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1.
Arq. bras. oftalmol ; 84(3): 282-296, May-June 2021. tab, graf
Article in English | LILACS | ID: biblio-1248965

ABSTRACT

ABSTRACT This review is intended to describe the therapeutic approaches for corneal blindness, detailing the steps and elements involved in corneal wound healing. It also presents the limitations of the actual surgical and pharmacological strategies used to restore and maintain corneal transparency in terms of long-term survival and geographic coverage. In addition, we critically review the perspectives of anabolic agents, including vitamin A, hormones, growth factors, and novel promitotic and anti-inflammatory modulators, to assist corneal wound healing. We discuss the studies involving nanotechnology, gene therapy, and tissue reengineering as potential future strategies to work solely or in combination with corneal surgery to prevent or revert corneal blindness.(AU)


RESUMO O presente trabalho traz uma revisão das abordagens terapêuticas para a cegueira da córnea. O estudo detalha as etapas e os elementos envolvidos na cicatrização da córnea. Ele mostra as limitações das estratégias cirúrgicas e farmacológicas usadas para restaurar e manter a transparência da córnea em termos de sobrevida a longo prazo e alcance geográfico. As perspectivas dos agentes anabólicos, incluindo vitamina A, hormônios, fatores de crescimento e novos moduladores pró-mitóticos e anti-inflamatórios para auxiliar a cicatrização da ferida na córnea, são revisadas criticamente. Aqui, apresentamos estudos envolvendo nanotecnologia, terapia gênica e reengenharia de tecidos como possíveis estratégias futuras para atuar de maneira isolada ou combinada com a cirurgia da córnea para prevenir ou reverter a cegueira corneana.(AU)


Subject(s)
Humans , Blindness/prevention & control , Blindness/therapy , Corneal Injuries/prevention & control , Corneal Injuries/therapy , Stem Cells , Vitamin A/therapeutic use , Genetic Therapy/instrumentation , Nanotechnology/instrumentation , Intercellular Signaling Peptides and Proteins/therapeutic use , Hormones/therapeutic use , Anti-Inflammatory Agents/therapeutic use
2.
Arq. gastroenterol ; 58(1): 55-60, Jan.-Mar. 2021. tab, graf
Article in English | LILACS | ID: biblio-1248983

ABSTRACT

ABSTRACT BACKGROUND: Colorectal cancer is the third most common neoplasm in the world. Methylation of tumor related genes in CpG islands can cause gene silencing and been involved in the development of cancer. The potential role of DKK2 as a biomarker for early diagnosis of colorectal cancer remains unclear. OBJECTIVE: The aim of the study was to evaluate the profile of methylation and RNAm expression of DKK2 as potential predictors of colorectal cancer diagnosis and prognosis. METHODS: Expression of mRNAs encoding DKK2 in 35 colorectal cancer tissues was quantified using real-time polymerase chain reaction analysis. The DNA methylation was studied by high resolution melting analysis. The general characteristics of the patients were collected. DKK2 methylation and expression were compared to clinical, pathological aspects and overall survival. RESULTS: Among the 35 patients studied, 18 were male, 10 were on right colon and 25 on left colon. Among the 20 patients with high hypermethylation, 15 of them had mRNA low expression of DKK2. There was no significant association between DKK2 promoter methylation and mRNA DKK2 expression and clinical or pathological features. DKK2 promoter methylation (P=0.154) and DKK2 RNA expression (P=0.345) did not show significant correlation with overall survival. CONCLUSION: DKK2 promoter methylation and DKK2 RNA status appear to be biomarkers of cancer diagnosis but not predictors of prognosis.


RESUMO CONTEXTO: O câncer colorretal é a terceira neoplasia mais comum no mundo. A metilação de alguns genes nas ilhas CpG podem causar silenciamento gênico e estar envolvida no desenvolvimento de câncer. O potencial papel de DKK2 como um biomarcador no diagnóstico precoce de CCR permanece incerto. OBJETIVO: O objetivo do estudo foi avaliar o perfil de metilação e expressão de RNAm do gene DKK2 para identificar preditores potenciais de diagnóstico e prognóstico de CCR. MÉTODOS: A expressão de mRNAs que codificam DKK2 em 35 tecidos de câncer colorretal foi quantificada por reação em cadeia da polimerase em tempo real e a metilação do DNA foi verificada por análise de alta resolução. As características gerais dos pacientes foram coletadas. A metilação e expressão de DKK2 foram comparadas aos aspectos clínicos, patológicos e à sobrevida global. RESULTADOS: Entre os 35 pacientes estudados, 18 eram do sexo masculino, 10 tumores eram do cólon ascendente ou transverso e 25 do descendente ou reto. Entre os 20 pacientes com hipermetilação, 12 deles apresentaram baixa expressão de RNAm do gene DKK2. Não houve associação significativa entre a metilação do promotor de DKK2 e a expressão de RNAm de DKK2 e características clínicas ou patológicas. A metilação do promotor de DKK2 e a expressão do RNA de DKK2 não mostraram correlação com sobrevida global dos pacientes com CCR. CONCLUSÃO: A metilação do gene promotor e a expressão do RNAm do gene DKK2 parecem ser biomarcadores de diagnóstico de câncer, mas não se mostraram úteis na avaliação prognóstica.


Subject(s)
Humans , Male , Female , Colorectal Neoplasms/genetics , DNA Methylation , Prognosis , Biomarkers, Tumor/genetics , Biomarkers, Tumor/metabolism , Promoter Regions, Genetic , CpG Islands , Intercellular Signaling Peptides and Proteins/genetics
3.
Repert. med. cir ; 30(1): 13-21, 2021. Ilus., tab.
Article in English | LILACS, COLNAL | ID: biblio-1281415

ABSTRACT

El gen AIP (proteína moduladora de la actividad del receptor de aril hidrocarburos) se localiza en la región 11q13.2 y codifica para una proteína de 330 aminoácidos que interactúa con el factor de transcripción AhR (receptor para aril hidrocarburos). Las mutaciones en este gen se han asociado con adenomas pituitarios aislados de tipo familiar (APAF). Se caracterizan por una presentación temprana (alrededor de 20 años), por lo regular producen hormona de crecimiento y/o prolactina, tienen un comportamiento clínico agresivo y poca respuesta a análogos de somatostatina.


The AIP gene (aryl hydrocarbon receptor interacting protein) is located on chromosome 11q13.2 and encodes a 330 amino acid protein which interacts with the aryl hydrocarbon receptor (AHR) transcription factor. Mutations in the AIP gene have been associated with familial isolated pituitary adenomas (FIPA). They characterize by an early-onset (around the age of 20 years old) and for being aggressive, growth hormone and/or prolactin-secreting tumors, with poor response to somatostatin analogues.


Subject(s)
Humans , Animals , Male , Female , Child , Adolescent , Adult , Young Adult , Pituitary Neoplasms/genetics , Pituitary Neoplasms/metabolism , Adenoma/genetics , Adenoma/metabolism , Intercellular Signaling Peptides and Proteins/genetics , Intercellular Signaling Peptides and Proteins/metabolism , Pituitary Diseases/genetics , Pituitary Diseases/metabolism
4.
Article in Chinese | WPRIM | ID: wpr-878716

ABSTRACT

Objective To investigate the expression of Cripto-1 in pancreatic cancer and to analyze its clinical significance. Methods Cripto-1 expression in normal pancreas,pancreatic cancer and adjacent non-tumor tissues,chronic pancreatitis tissues and other related tissues was evaluated using immunohistochemistry.The association of Cripto-1 expression with the clinicopathological characteristics and the prognostic value of Cripto-1 in patients with pancreatic cancer were analyzed. Results The expression of Cripto-1 was higher in chronic pancreatitis tissues,pancreatic cancer and its metastases than in normal pancreas(P=0.019,P=0.025,and P=0.018,respectively).Cripto-1 overexpression was correlated with poorly differentiated pancreatic cancer.The patients with Cripto-1 upregulation had shorter median survival time(8 months vs.16 months,χ


Subject(s)
Biomarkers, Tumor , Carcinoma, Pancreatic Ductal , GPI-Linked Proteins , Humans , Intercellular Signaling Peptides and Proteins , Neoplasm Proteins/genetics , Pancreatic Neoplasms , Prognosis
5.
Rev. ADM ; 77(6): 287-294, nov.-dic. 2020. ilus, tab
Article in Spanish | LILACS | ID: biblio-1150870

ABSTRACT

Introducción: El carcinoma oral de células escamosas (COCE) es una neoplasia epitelial maligna que se presenta frecuentemente entre la quinta y sexta década de la vida. Su compleja patogénesis incluye el proceso de angiogénesis y la regulación del microambiente tumoral como mecanismos de progresión tumoral. Objetivo: Determinar la relación entre las variables clínicas e histológicas del COCE con la inmunoexpresión de VEGF, FGF-1, FGFR-1, TGFB-1, TGFBR-II y CD105. Material y métodos: Nueve casos de COCE; tres bien (BD), tres moderado (MD) y tres pobremente diferenciados (PD) obtenidos del Departamento de Patología y Medicina Bucal, División de Estudios de Postgrado e Investigación. Se aplicó la técnica de inmunohistoquímica por peroxidasa para identificar la expresión de VEGF, FGF-1, FGFR- 1, TGFB-1, TGFBR-II y CD105. El análisis de inmunoexpresión se realizó con el programa ImageJ. Se aplicó la prueba de Kruskal-Wallis y correlación de Spearman (p < 0.05). Resultados: La inmunoexpresión de VEGF fue mayor en los COCE PD, FGFR-1 fue positivo en los BD, mientras que FGF, TGFB-1 y TGFBR-II fueron negativos. El análisis de microdensidad vascular (MVD) indicó mayor número de vasos CD105 positivos en los carcinomas BD, seguidos de los PD y MD. Conclusión: Considerando los resultados obtenidos podemos concluir que la angiogénesis es un fenómeno constante independiente del grado de diferenciación que durante el proceso de transformación de una neoplasia requerirá la formación de vasos sanguíneos y que este proceso puede ser modulado por factores de crecimiento tales como los analizados en este trabajo (AU)


Introduction: Oral squamous cell carcinoma (OSCC) is a malignant epithelial neoplasm that frequently occurs between the fifth and sixth decade of life. Its complex pathogenesis includes the angiogenesis process and the regulation of the tumor microenvironment as mechanisms of tumor progression. Objective: To determine the relationship between the clinical and histological variables of OSCC with the immunoexpression of VEGF, FGF-1, FGFR-1, TGFB- 1, TGFBR-II and CD105. Material and methods: Nine cases of OSCC; three well (WD), three moderate (MD) and three poorly differentiated (PD) obtained from the Oral Medicine and Pathology Department, Division of Graduate Studies and Research. The peroxidase immunohistochemistry technique was performed to identify the expression of VEGF, FGF-1, FGFR-1, TGFB-1, TGFBR-II and CD105. The immunoexpression analysis was performed with the ImageJ software. The Kruskal-Wallis and Spearman correlation test were performed (p < 0.05). Results: VEGF immunoexpression was higher in PD OSCC, while FGFR-1 was predominantly positive in WD; FGF, TGFB-1 and TGFBR-II were negative. Vascular microdensity analysis (MVD) indicated a greater number of CD105 positive vessels in WD carcinomas, followed by PD and MD. Conclusion: Considering the results obtained, we can conclude that angiogenesis is a constant phenomenon independent of the degree of differentiation; that during the transformation process of a neoplasm it will require the formation of blood vessels and that this process can be modulated by growth factors such as those analyzed in this work (AU)


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Carcinoma, Squamous Cell/immunology , Fibroblast Growth Factor 1 , Vascular Endothelial Growth Factor A , Blood Vessels , Immunohistochemistry , Statistical Analysis , Histological Techniques , Intercellular Signaling Peptides and Proteins , Receptor, Fibroblast Growth Factor, Type 1 , Endoglin , Mexico
6.
Medicentro (Villa Clara) ; 24(4): 785-804, oct.-dic. 2020.
Article in Spanish | LILACS | ID: biblio-1143246

ABSTRACT

RESUMEN Introducción: los avances científico-técnicos en el campo de la Biología celular y molecular han permitido restaurar y mejorar la función de órganos y tejidos lesionados por ciertas enfermedades y traumatismos. La Ingeniería de tejido se define como el uso de los principios y métodos de la Ingeniería, la Biología y la Bioquímica, los cuales están orientados a la comprensión de la estructura y la función de los tejidos normales y patológicos, y al consecuente desarrollo de sustitutos biológicos para restaurar, mantener o mejorar su función. Objetivo: realizar un acercamiento a algunos aspectos de la Biología celular y molecular vinculada con la Ingeniería tisular ósea. Métodos: se realizó una búsqueda bibliográfica en SciELO Cuba y en Google académico durante el período de 1 de marzo al 28 de abril de 2018. Se evaluaron 134 artículos y el estudio se circunscribió a los 25 artículos que se enfocaban en estas temáticas de manera integral. Conclusiones: se ofreció una visión general de los avances que se han obtenido en la Biología celular y molecular, y en particular a: la aplicación de los factores de crecimiento en la Ingeniería del tejido óseo, así como sus futuras perspectivas. Se concluyó que es fundamental consolidar una base apropiada de conocimientos sobre la Biología celular y molecular y el desarrollo actual de la Ingeniería del tejido óseo.


ABSTRACT Introduction: scientific and technical advances in the field of cellular and molecular biology have allowed restoring and improving the function of organs and tissues injured by certain diseases and trauma. Tissue engineering is defined as the use of the principles and methods of Engineering, Biology and Biochemistry, which are aimed at understanding the structure and function of normal and pathological tissues, and the consequent development of biological substitutes to restore, maintain or improve their function. Objective: to carry out an approach to some aspects of cellular and molecular biology related to bone tissue engineering. Methods: a bibliographic review was carried out in SciELO Cuba and Google Scholar from March 1 to April 28, 2018. A number of 134 articles were evaluated and the study was limited to 25 articles that focused on these topics in an integral way. Conclusions: an overview of the advances that have been obtained in cellular and molecular biology was offered, particularly to the application of growth factors in bone tissue engineering, as well as its future perspectives. We concluded that it is essential to consolidate an appropriate knowledge base on cellular and molecular biology and the current development of bone tissue engineering.


Subject(s)
Tissue Engineering , Intercellular Signaling Peptides and Proteins , Regenerative Medicine , Placenta Growth Factor
7.
Braz. j. otorhinolaryngol. (Impr.) ; 86(5): 617-625, Sept.-Oct. 2020. tab, graf
Article in English | LILACS | ID: biblio-1132640

ABSTRACT

Abstract Introduction: Nasopharyngeal carcinoma, an epithelial-derived malignant tumor which because of its anatomical location and atypical early symptoms, when diagnosed invasion and metastasis often have occurred. This requires a better understanding of the development mechanism, identifying diagnostic markers, and developing new treatment strategies. Objective: To study the relationship of LMP1 and Cripto-1 in nasopharyngeal carcinoma. Methods: The expression of LMP1 and Cripto-1 in specimens obtained from nasopharyngeal carcinoma patients (n = 42) and nasopharyngitis patients (n = 22) were examined. The expression of LMP1 and Cripto-1 in LMP1-negative and LMP1-positive (CNE1-LMP1) cells were also examined. Results: The expression of LMP1 and Cripto-1 was significantly higher in nasopharyngeal carcinoma than in nasopharyngitis (p < 0.05). Their expression in nasopharyngeal carcinoma with metastasis were significantly higher than that without metastasis (p < 0.05), which was correlated with TNM staging (p < 0.05). High Cripto-1 expression and high proliferation rate were seen in CNE1-LMP1 cells. Conclusions: The expression of LMP1 and Cripto-1 in nasopharyngeal carcinoma is positively related. Their co-expression might contribute to the proliferation and metastasis of nasopharyngeal carcinoma.


Resumo Introdução: O carcinoma nasofaríngeo é um tumor maligno derivado do epitélio de localização anatômica recôndita e sintomas iniciais atípicos; quando diagnosticado, frequentemente invasão e metástases já ocorreram. Isso requer uma melhor compreensão do seu mecanismo de desenvolvimento, identificação dos marcadores diagnósticos e desenvolvimento de novas estratégias de tratamento. Objetivo: Estudar a relação de LMP1 e Cripto-1 no carcinoma nasofaríngeo. Método: A expressão de LMP1 e Cripto-1 em espécimes obtidos de pacientes com carcinoma de nasofaringe (n = 42) e pacientes com nasofaringite (n = 22) foi analisada. A expressão de LMP1 e Cripto-1 em células LMP1-negativas e LMP1-positivas (CNE1-LMP1) também foi analisada. Resultados: A expressão de LMP1 e Cripto-1 foi significantemente maior na presença de carcinoma nasofaríngeo do que na nasofaringite (p < 0,05). Sua expressão em carcinomas com metástase foi significantemente maior do que em casos sem metástase (p < 0,05), o que se correlacionou com o estadiamento TNM (p < 0,05). Uma alta expressão de Cripto-1 e alta taxa de proliferação foram observadas nas células CNE1-LMP1. Conclusões: A expressão de LMP1 e Cripto-1 é positivamente relacionada com carcinoma nasofaríngeo. Sua coexpressão pode ser atribuída à proliferação e metástase do tumor.


Subject(s)
Humans , Nasopharyngeal Neoplasms , Nasopharyngeal Carcinoma , Bacterial Outer Membrane Proteins , Viral Matrix Proteins , Intercellular Signaling Peptides and Proteins
8.
Rev. bras. ortop ; 55(3): 263-268, May-June 2020. tab
Article in English | LILACS | ID: biblio-1138037

ABSTRACT

Abstract Platelet-rich plasma is derived from centrifuging whole blood. There is increasing interest in the sports medicine and athlete community about providing endogenous growth factors directly to the injury site, using autologous blood products such as platelet-rich plasma. The aim of the present study is to evaluate the association between research financing, conflict of interests, level of evidence and author affiliation with the interpretation of results in articles published on platelet-rich plasma therapy in musculoskeletal ailments. A review of the current literature was performed. The outcome was classified as favorable or unfavorable. The declaration of conflict of interests and the type of funding was extracted from each article. The financing was classified as industry-sponsored; not industry-sponsored; or unidentifiable. The level of evidence was categorized from I to IV. Higher positive outcomes were observed in 134 studies with industry sponsorship compared with not industry-sponsored studies (odds ratio [OR]: 0.26; 95% confidence interval [95%CI]: 0.08-0.85; p < 0.05). Compared with level of evidence I, levels II and IV increase the probability of positive outcomes by 12.42 times (p < 0.01) and 10.97 times (p < 0.01) respectively. Proportionally, industry-sponsored studies are more likely to present positive results, as well as articles with a lower quality of evidence.


Resumo O plasma rico em plaquetas é derivado da centrifugação do sangue total. Há um interesse crescente, na medicina esportiva e na comunidade atlética, no fornecimento de fatores de crescimento endógeno diretamente ao sítio da lesão, usando componentes sanguíneos autólogos, como o plasma rico em plaquetas. O objetivo deste estudo é avaliar a associação entre financiamento de pesquisa, conflito de interesses, nível de evidência e afiliação dos autores com a interpretação dos resultados em publicações sobre terapia com plasma rico em plaquetas nas doenças osteomusculares. Foi realizada uma revisão da literatura atual. O desfecho foi classificado como favorável ou desfavorável. A declaração de conflito de interesses e o tipo de financiamento foram extraídos de cada artigo. O financiamento foi qualificado em patrocínio industrial; não patrocinado pela indústria; ou não identificável. O nível de evidência foi categorizado de I a IV. Foram obtidos os resultados positivos mais altos com 134 estudos financiados pelo setor industrial, em comparação com estudos não financiados pela indústria (razão de probabilidades [RP]: 0,26; intervalo de confiança de 95% [95%IC]: 0,08-0,85; p < 0,05). Em comparação com o nível de evidência I, os níveis II e IV aumentam a probabilidade de resultado positivo em 12,42 vezes (p < 0,01) e 10,97 vezes (p < 0,01), respectivamente. Demonstrou-se que, proporcionalmente, estudos patrocinados pela indústria têm maior probabilidade de apresentar resultados positivos, bem como artigos com menor qualidade de evidência.


Subject(s)
Plasma , Sports Medicine , Blood Platelets , Capital Financing , Conflict of Interest , Musculoskeletal Diseases , Intercellular Signaling Peptides and Proteins , Ethics , Platelet-Rich Plasma , Industry
9.
Rev. Assoc. Med. Bras. (1992) ; 66(3): 300-306, Mar. 2020. tab, graf
Article in English | LILACS, SES-SP | ID: biblio-1136211

ABSTRACT

SUMMARY OBJECTIVES To compare the serum concentrations of adipokines resistin and chemerin in children and adolescents with eutrophic and overweight and to evaluate their relationship with anthropometric, biochemical, and blood pressure variables. METHODS a cross-sectional epidemiological study was conducted with 234 students enrolled in public elementary schools in the city of Juiz de Fora / MG. Anthropometric evaluation, biochemistry, and blood pressure measurement were performed. Statistical analyzes included the Student-t or Mann-Whitney tests, Pearson or Spearman correlation, used according to the distribution of the variables, and linear regression analysis, by means of the evaluation of the effect of the independent variables on the serum levels of chemerin and resistin, adjusted for age and sex. For the data analysis, SPSS® software version 21.0 and STATA® version 10.1 were used, assuming a significance level of 5%. RESULTS the concentrations of chemerin were higher in eutrophic individuals than in those with excess weight (p> 0.05). In contrast, levels of resistin were higher in the young with excess weight than in the eutrophic ones (p <0.05). In the multiple linear regression analysis, the levels of chemerin were associated with the values of resistin, systolic, and diastolic blood pressure. Resistance levels maintained association only with BMI and chemerin values. CONCLUSION the adipokines analyzed presented a distinct profile in the groups of children and adolescents with eutrophic and overweight.


RESUMO OBJETIVOS Comparar as concentrações séricas das adipocinas resistina e quemerina em crianças e adolescentes com eutrofia e excesso de peso e avaliar sua relação com as variáveis antropométricas, bioquímicas e a pressão arterial. MÉTODOS Estudo epidemiológico transversal realizado com 234 estudantes matriculados em escolas públicas do ensino fundamental no município de Juiz de Fora/MG. Realizou-se avaliação antropométrica, bioquímica e aferição da pressão arterial. As análises estatísticas compreenderam os testes t de Student ou Mann-Whitney, correlação de Pearson ou Spearman, utilizados de acordo com a distribuição das variáveis, e análise de regressão linear, realizada por meio da avaliação do efeito das variáveis independentes nos níveis séricos de quemerina e resistina, ajustado por idade e sexo. Para a análise dos dados foram utilizados os softwares SPSS® versão 21.0 e Stata® versão 10.1, admitindo-se nível de significância de 5%. RESULTADOS As concentrações de quemerina foram maiores nos indivíduos eutróficos do que nos com excesso de peso (p>0,05). Em contrapartida, os níveis de resistina estiveram maiores nos jovens com excesso ponderal do que nos eutróficos (p<0,05). Na análise de regressão linear múltipla, os níveis de quemerina apresentaram associação com os valores de resistina, pressão arterial sistólica e diastólica. Os níveis de resistina mantiveram associação apenas com os valores de IMC e quemerina. CONCLUSÃO As adipocinas analisadas apresentaram perfil distinto nos grupos de crianças e adolescentes com eutrofia e com excesso de peso.


Subject(s)
Humans , Male , Female , Child , Adolescent , Chemokines/blood , Overweight/blood , Adiponectin/blood , Resistin/blood , Anthropometry , Cross-Sectional Studies , Intercellular Signaling Peptides and Proteins , Overweight/complications , Overweight/metabolism , Adipokines
10.
Braz. oral res. (Online) ; 34: e034, 2020. tab, graf
Article in English | LILACS, BBO | ID: biblio-1100933

ABSTRACT

Abstract The aim of this split mouth, double blinded, randomized clinical trial was to evaluate the clinical efficacy of use of Plasma rich in growth factors (PRGF) as an adjunct to scaling and root planing (SRP) in the treatment of periodontal pockets. Twenty six patients (15 males, 11 females) diagnosed with generalized periodontitis with Pocket Depth > 5mm and plaque index score < 1.5, were randomly allocated by using computer generated random sequence, into two groups, one treated with intra-pocket application of PRGF adjunct to SRP and other with SRP alone. The clinical outcomes like pocket depth (PD), relative attachment level (RAL) and sulcus bleeding index (SBI) were assessed at baseline, 3 months and 6 months. Twenty two patients (44 sites) were analyzed at the end of 6 month follow-up, using SPSS 20.0v software. There was a significant statistical difference observed between both the groups favouring SRP +PRGF group in terms of PD (p = 0.007) and RAL (p = 0.021) at the end of 6 month follow-up. Also there was a statistical significant difference (< 0.001) at all time points compared to baseline, for all parameters in intra-group comparison. Moreover, the sites with PD>4mm necessitating further treatment after 6-month follow-up were significantly lesser for SRP+PRGF group. The use of PRGF technology in non-surgical periodontal therapy, by single intra-pocket application in to periodontal pockets as an adjunct to SRP, in chronic periodontitis patients, was found to be effective in reduction of pocket depth and gain in clinical attachment level.


Subject(s)
Humans , Male , Female , Adult , Periodontal Pocket/therapy , Dental Scaling/methods , Intercellular Signaling Peptides and Proteins/therapeutic use , Platelet-Rich Plasma , Time Factors , Periodontal Index , Double-Blind Method , Reproducibility of Results , Follow-Up Studies , Treatment Outcome , Periodontal Attachment Loss , Middle Aged
11.
Actual. osteol ; 16(3): 211-231, 2020. ilus, tab
Article in Spanish | LILACS | ID: biblio-1253844

ABSTRACT

Hematoma, inflamación, angiogénesis y osteogénesis son distintas etapas que se superponen durante el proceso de reparación de una fractura ósea. Durante las primeras etapas se liberan distintos factores de crecimiento quimioatractantes que producen el reclutamiento de diversas células para generar la formación de un hueso funcional con su respectiva vasculatura. Debido a la importancia que posee la angiogénesis en el desarrollo de una adecuada red vascular, tanto para la formación ósea como en su reparación, en los últimos años los especialistas en ingeniería de tejido óseo han estudiado la manera de fomentar tanto la osteogénesis como la angiogénesis durante la reparación ósea. En este trabajo de revisión, se recopilan y discuten los principales conceptos sobre distintas estrategias a fin de lograr un implante sintético con funcionalidad dual promoviendo los procesos que garanticen la angiogénesis y la osteogénesis en forma acoplada utilizando distintos tipos de scaffolds y sistemas de liberación de drogas osteoinductoras y angioinductoras. La liberación dual de factores osteoinductores y angioinductores debe producirse en forma témporo-espacial controlada para garantizar los efectos deseados sin producir efectos adversos como tumores o hueso ectópico. Se deben tener en cuenta varios factores como el tipo y la arquitectura de hueso, tipo de daño, edad, sexo y condiciones patológicas del paciente. En cuanto a los materiales se debe considerar el tipo de material para usar como scaffold, los factores inductores seleccionados, su combinación y sistemas de liberación. El avance en estos estudios hará que la Ingeniería de Tejido Óseo sea una alternativa terapéutica en el futuro. (AU)


Hematoma, inflammation, angiogenesis, and osteogenesis are different stages that overlap during the healing process of a bone fracture. During the first stages, different chemoattractant growth factors are released which produce the recruitment of various cells that will induce the formation of a functional bone with its respective vasculature. Due to the importance of angiogenesis for the development of an adequate vascular network in both bone formation and repair, in recent years specialists in bone tissue engineering have studied how to promote both osteogenesis and angiogenesis during bone repair. In this review, the main concepts on different strategies developed to achieve a synthetic implant with dual functionality, promoting processes that guarantee angiogenesis and osteogenesis in a coupled way using different types of scaffolds and osteo-drug delivery systems and angioinductors, are collected and discussed. The dual release for osteoinductive and angioinductive factors must ensure the release of them in a controlled time-space manner to guarantee the desired effects without producing adverse effects such as tumors or ectopic bone. Several factors must be taken into account, such as bone type and architecture, type of damage to be repaired, age, sex, and pathological conditions of the patient. Regarding the materials, the type of material to be used as scaffolds, selected inducing factors and drug release system must be considered. Advances in these studies will make Bone Tissue Engineering a therapeutic alternative in the future. (AU)


Subject(s)
Humans , Tissue Engineering/trends , Fractures, Bone/rehabilitation , Osteogenesis , Biocompatible Materials , Drug Delivery Systems , Neovascularization, Physiologic , Intercellular Signaling Peptides and Proteins , Tissue Scaffolds
12.
J. appl. oral sci ; 28: e20190236, 2020. tab, graf
Article in English | LILACS, BBO | ID: biblio-1090786

ABSTRACT

Abstract Objective This clinical trial sought to evaluate the clinical effectiveness of concentrated growth factor (CGF) and compare it with connective tissue graft (CTG) with coronally advanced flap (CAF) in the treatment of Miller Class I gingival recessions (GR). Methodology This split-mouth study included 74 Miller Class I isolated (24 teeth) or multiple (50 teeth) GRs in 23 jaws of 19 patients. GRs were randomly treated using CGF (test group: 37 teeth; 12 teeth in isolated GRs, 25 teeth in multiple GRs) or CTG with CAF (control group: 37 teeth;12 teeth isolated GRs, 25 teeth in multiple GRs). Clinical variables, plaque index (PI), gingival index (GI), probing depth (PD), recession depth (RD), recession width (RW), clinical attachment level (CAL), keratinized tissue thickness (KTT), keratinized tissue width (KTW), and root coverage (RC) were assessed at the baseline as well as at three and six months post-surgery. Healing index (HI) were obtained in the second and third weeks post-surgery. Postoperative pain was assessed for the first seven days using a horizontal visual analog scale (VAS). Results No significant change was observed in PI, GI, or PD values in either the intergroup or the intragroup comparisons. A statistically significant decrease was observed in CAL, RD, and RW, and KTT increased in all groups at three and six months compared with the baseline. The control group had greater increases in KTW, KTT, and RC at three and six months. No significant difference was found in CAL or RD at the third and sixth months between the two groups. Healing was found to be similar for both groups in the second and third weeks post-surgery. The VAS values in the control group were higher than in the test group, especially at the second, fourth, fifth, and seventh days postoperatively. Conclusions CTG is superior to CGF with CAF for increasing KTT, KTW, and RC. CGF may be preferable due to decreased postoperative pain.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Surgical Flaps/transplantation , Connective Tissue/transplantation , Intercellular Signaling Peptides and Proteins/therapeutic use , Gingival Recession/surgery , Pain, Postoperative , Reference Values , Time Factors , Wound Healing , Blood Platelets , Periodontal Index , Dental Plaque Index , Reproducibility of Results , Treatment Outcome , Statistics, Nonparametric
13.
Article in English | WPRIM | ID: wpr-811113

ABSTRACT

BACKGROUND: Platelet-rich plasma (PRP) is a plasma component of autologous blood containing a high concentration of platelets. PRP is used to promote healing of damaged tissues. However, there are not many studies on the composition and expression patterns of active proteins in PRP. The purpose of this study was to identify unknown factors that contribute to tissue healing by proteomic analysis of proteins in PRP.METHODS: Three men in their 30s with no basal disease participated in this study. All identified proteins were classified for tissue healing-related functions on the basis of the gene ontology analysis of adhesion molecule with Ig-like domain 2 (AmiGO2). PRP was prepared by using the ACP kit and GPS III kit.RESULTS: We identified a total of 125 proteins related to wound healing, along with three proteins for angiogenesis involved in wound healing, two proteins for fibroblast migration, four proteins for collagen biosynthesis process, two proteins for glycosaminoglycan biosynthesis process, and 13 proteins for glycosaminoglycan binding. So, in addition to the growth factors that have been already known to be involved in tissue healing, 25 new proteins were identified.CONCLUSIONS: We identified the unknown proteins associated with tissue healing in PRP. Our findings may serve as a foundation for the establishment of basic medical evidence for PRP applications.


Subject(s)
Classification , Collagen , Fibroblasts , Gene Ontology , Humans , Intercellular Signaling Peptides and Proteins , Male , Plasma , Platelet-Rich Plasma , Proteome , Wound Healing
14.
Blood Research ; : 35-43, 2020.
Article in English | WPRIM | ID: wpr-820805

ABSTRACT

BACKGROUND: Fetal bovine serum (FBS) has been used to support the growth and proliferation of mammalian cells for decades. Owing to several risk factors associated with FBS, several trials have been conducted to evaluate substitutes to FBS with the same efficiency and the lower risk issues.METHODS: In this study, human platelet lysate (HPL) derived from activated human platelets was evaluated as an alternative to FBS due to the associated risk factors. To evaluate the efficiency of the preparation process, platelet count was performed before and after activation. The concentrations of several growth factors and proteins were measured to investigate HPL efficiency. HPL stability was studied at regular intervals, and optimal heparin concentration required to prevent gel formation in various media was determined. The biological activity of HPL and FBS was compared by evaluating the growth performance of Vero and Hep-2 cell lines.RESULTS: Result of platelet count assay revealed the efficiency of HPL preparation process. Growth factor concentrations in HPL were significantly higher than those in FBS, while the protein content of HPL was lower than that of FBS. Stability study data showed that the prepared HPL was stable for up to 15 months at −20℃. Ideal heparin concentration to be used in different media was dependent on calcium concentration. Results of cell viability assay showed that HPL was superior to FBS in supporting the growth and proliferation of Vero and Hep-2 cells.CONCLUSION: The HPL prepared by the mechanical activation of platelets may serve as an efficient alternative to FBS in cell culture process.


Subject(s)
Blood Platelets , Calcium , Cell Culture Techniques , Cell Line , Cell Survival , Heparin , Humans , Intercellular Signaling Peptides and Proteins , Platelet Count , Risk Factors
15.
Article in Chinese | WPRIM | ID: wpr-828180

ABSTRACT

Bladder has many important functions as a urine storage and voiding organ. Bladder injury caused by various pathological factors may need bladder reconstruction. Currently the standard procedure for bladder reconstruction is gastrointestinal replacement. However, due to the significant difference in their structure and function, intestinal segment replacement may lead to complications such as hematuria, dysuria, calculi and tumor. With the recent advance in tissue engineering and regenerative medicine, new techniques have emerged for the repair of bladder defects. This paper reviews the recent progress in three aspects of urinary bladder tissue engineering, i.e., seeding cells, scaffolds and growth factors.


Subject(s)
Humans , Intercellular Signaling Peptides and Proteins , Regenerative Medicine , Tissue Engineering , Tissue Scaffolds , Urinary Bladder
16.
Journal of Experimental Hematology ; (6): 1167-1170, 2020.
Article in Chinese | WPRIM | ID: wpr-827145

ABSTRACT

OBJECTIVE@#To investigate the effect of chidamide on the killing activity of NK (Natural killer cell, NK) cells targeting K562 cells and its related mechanism.@*METHODS@#K562 cells were pretreated with chidamide at different concentrations and cocultured with NK cells at different effect-target ratios. The killing effect of chidamide on K562 cells by NK cells, the expression of natural killer group 2 member D (NKG2D) ligands and apoptosis rate of K562 cells were detected by flow cytometry.@*RESULTS@#The killing sensitivity of NK cells to K562 cells could be enhanced by chidamide. The expression of ULBP2 on K562 cell surface could be up-regulate, however, the expression of ULBP1 and MICA/MICB showed no statistically difference as compared with control group. Chidamide showed no obvious cytotoxicity to K562 cells.@*CONCLUSION@#Chidamide can significantly improve killing efficiency of NK cells on K562 cells, which may be related to the up-regulation of ULBP2 expression.


Subject(s)
Aminopyridines , Benzamides , GPI-Linked Proteins , Histocompatibility Antigens Class I , Humans , Intercellular Signaling Peptides and Proteins , K562 Cells , Killer Cells, Natural , Allergy and Immunology , NK Cell Lectin-Like Receptor Subfamily K
17.
Article in English | WPRIM | ID: wpr-786216

ABSTRACT

Therapeutic angiogenesis is an important strategy to rescue ischemic tissues in patients with critical limb ischemia having no other treatment option such as endovascular angioplasty or bypass surgery. Studies indicated so far possibilities of therapeutic angiogenesis using autologous bone marrow mononuclear cells, CD34⁺ cells, peripheral blood mononuclear cells, adipose-derived stem/progenitor cells, and etc. Recent studies indicated that subcutaneous adipose tissue contains stem/progenitor cells that can give rise to several mesenchymal lineage cells. Moreover, these mesenchymal progenitor cells release a variety of angiogenic growth factors including vascular endothelial growth factor, fibroblast growth factor, hepatocyte growth factor and chemokine stromal cell-derived factor-1. Subcutaneous adipose tissues can be harvested by less invasive technique. These biological properties of adipose-derived regenerative cells (ADRCs) implicate that autologous subcutaneous adipose tissue would be a useful cell source for therapeutic angiogenesis in humans. In this review, I would like to discuss biological properties and future perspective of ADRCs-mediated therapeutic angiogenesis.


Subject(s)
Angioplasty , Bone Marrow , Extremities , Fibroblast Growth Factors , Hepatocyte Growth Factor , Humans , Intercellular Signaling Peptides and Proteins , Ischemia , Mesenchymal Stem Cells , Stem Cell Transplantation , Stem Cells , Subcutaneous Fat , Vascular Endothelial Growth Factor A
18.
Int. j. odontostomatol. (Print) ; 13(4): 497-503, dic. 2019. tab, graf
Article in Spanish | LILACS | ID: biblio-1056491

ABSTRACT

RESUMEN: Los concentrados plaquetarios han emergido como un potencial material regenerativo, utilizado de forma aislada o como andamiaje para otros materiales de injerto. Son extractos de sangre, obtenidos después de procesar una muestra de sangre completa, mediante centrifugación. El primer reporte data de 1970, con un CP utilizado como pegamento para mejorar cicatrización de heridas de piel. En 1998, se usaron en cirugía oral y maxilofacial. Desde entonces, se han desarrollado diferentes técnicas y una variedad de preparaciones. Entre ellas, cabe destacar el plasma rico en plaquetas, fibrina rica en plaquetas y leucocitos (L-PRF) y plasma rico en factores de crecimiento (PRGF). El desarrollo de estos biomateriales, se debe en parte, a la posibilidad de alterar la concentración de mediadores químicos liberados en una lesión que provoque la formación de un coágulo, que pueda madurar conforme transcurran las fases del proceso inflamatorio y concluya con la regeneración íntegra del tejido dañado. El objetivo de este manuscrito fue describir las principales vías de señalización intracelular que se activan en presencia del L-PRF en cirugía oral, y sus efectos en la regulación del ciclo celular.


ABSTRACT: Platelet concentrates (PC) have emerged as a potential regenerative material, used in isolation or as scaffolding for other graft materials. They are blood extracts, obtained after processing a sample of whole blood, by centrifugation. The first report dates from 1970, with a PC used glue to improve the healing of skin wounds. In 1998, they were used in oral and maxillofacial surgery. Since then, different techniques and a variety of preparations have been developed. These include platelet-rich plasma, fibrin rich in platelets and leukocytes (L-PRF) and plasma rich in growth factors (PRGF). The development of these biomaterials, is due in part to the possibility of altering the concentration of chemical mediators released in a lesion that causes the formation of a clot, which can mature as the phases of the inflammatory process pass and conclude with the complete regeneration of the damaged tissue. The aim of this manuscript was to describe the main intracellular signaling pathways that are activated in the presence of LPRF in oral surgery, and its effects on the regulation of the cell cycle.


Subject(s)
Humans , Centrifugation , Intercellular Signaling Peptides and Proteins , Platelet-Rich Fibrin , Periapical Periodontitis , Bone Regeneration , Signal Transduction , Cyclins , Vascular Endothelial Growth Factor A
19.
Int. j. morphol ; 37(4): 1564-1571, Dec. 2019. tab
Article in Spanish | LILACS | ID: biblio-1040170

ABSTRACT

Las glándulas salivales humanas pueden ser gravemente lesionadas por la radioterapia utilizada contra neoplasias de cabeza y cuello, produciendo hiposialia y xerostomía, las cuales afectan la salud oral y sistémica, mermando la calidad de vida de la persona. Los tratamientos convencionales actuales están diseñados para disminuir los síntomas, sin actuar sobre los cambios fisiopatológicos que se dan a nivel glandular. Esta revisión intenta analizar aquellas terapias preventivas y/o curativas que están desarrollándose en el campo biomolecular y que tienen un futuro prometedor por sus características innovadoras: terapia génica, terapia con células madre y terapia con factores de crecimiento. Se evidencia un aporte adicional de la nanotecnología, la cual está mejorando las vías de aplicación de los tratamientos.


Human salivary glands can be seriously injured by the radiotherapy used against head and neck neoplasms, producing hyposialia and xerostomy, which affect oral and systemic health, diminishing the person's quality of life. Current conventional treatments are designed to reduce symptoms, without acting on the pathophysiological changes that occur at the glandular level. This review attempts to analyze those preventive and /or curative therapies that are developing in the biomolecular field and that have a promising future due to their innovative features: Gene therapy, stem cell therapy and growth factor therapy. An additional contribution of nanotechnology is evident, which is improving the routes of treatment application.


Subject(s)
Humans , Radiotherapy/adverse effects , Salivary Gland Diseases/prevention & control , Stem Cells/physiology , Genetic Therapy/methods , Intercellular Signaling Peptides and Proteins/therapeutic use , Radiation Injuries/prevention & control , Radiation-Protective Agents/therapeutic use , Salivary Gland Diseases/therapy , Salivary Glands/radiation effects , Xerostomia/prevention & control , Nanotechnology
20.
Int. j. odontostomatol. (Print) ; 13(3): 271-274, set. 2019. graf
Article in Spanish | LILACS | ID: biblio-1012421

ABSTRACT

RESUMEN: Entre los concentrados plaquetarios de segunda generación, ha suscitado creciente interés, el uso de fibrina rica en plaquetas y leucocitos inyectable (i-PRF); que se obtiene a partir de la centrifugación inmediata de sangre venosa del propio individuo, y que aporta concentraciones elevadas de factor de crecimiento vascular endotelial, factor de crecimiento transformante beta, y factor de crecimiento derivado de plaquetas, entre otras proteínas que inician y coordinan el proceso reparativo. Su nula citotoxicidad y consistencia líquida abren un nuevo campo de estudio y experimentación en el ámbito de la Cirugía Oral y de la Periodoncia, como sustancia para irrigar. El objetivo de este manuscrito fue reportar el uso del i-PRF como irrigador subgingival en el tratamiento periodontal convencional de defectos infra óseos con 6 meses de seguimiento. En ambos casos, se verificó un efecto positivo de irrigación, lo que abre el debate al uso de productos farmacéuticos tradicionales como la clorhexidina versus preparados autólogos sin efectos adversos reportados a la fecha.


ABSTRACT: Second generation platelet concentrates include the use of injectable platelet-rich fibrin (i-PRF), which has generated increasing interest because it is derived from immediate centrifugation of venous blood from the patients themselves. It provides high concentrations of vascular endothelial growth factor, transforming growth factor beta, and platelet-derived growth factor, among other proteins that initiate and coordinate the healing process. Its null cytotoxicity and liquid consistency has opened new research lines in the field of oral surgery and periodontics, as an irrigation substance. The aim of this manuscript was to report the use of i-PRF, as a subgingival irrigator in conventional periodontal treatment of infra osseous defects, with six months follow-up. In both cases, a positive effect of irrigation was confirmed. These findings, open the debate as regards the use of traditional pharmaceutical products (such as chlorhexidine), versus autonomous preparations without adverse effects reported to date.


Subject(s)
Humans , Female , Adult , Aged, 80 and over , Periodontics/methods , Regeneration/drug effects , Bone Substitutes/therapeutic use , Intercellular Signaling Peptides and Proteins/pharmacology , Platelet-Rich Fibrin , Biocompatible Materials/pharmacology , Bone Matrix , Radiography, Dental , Dental Occlusion , Control , Therapeutic Irrigation/methods
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