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Biol. Res ; 57: 4-4, 2024. ilus, graf
Article in English | LILACS | ID: biblio-1550059


BACKGROUND: Fibrous scars frequently form at the sites of bone nonunion when attempts to repair bone fractures have failed. However, the detailed mechanism by which fibroblasts, which are the main components of fibrous scars, impede osteogenesis remains largely unknown. RESULTS: In this study, we found that fibroblasts compete with osteogenesis in both human bone nonunion tissues and BMP2-induced ectopic osteogenesis in a mouse model. Fibroblasts could inhibit the osteoblastic differentiation of mesenchymal stem cells (MSCs) via direct and indirect cell competition. During this process, fibroblasts modulated the nuclear-cytoplasmic shuttling of YAP in MSCs. Knocking down YAP could inhibit osteoblast differentiation of MSCs, while overexpression of nuclear-localized YAP-5SA could reverse the inhibition of osteoblast differentiation of MSCs caused by fibroblasts. Furthermore, fibroblasts secreted DKK1, which further inhibited the formation of calcium nodules during the late stage of osteogenesis but did not affect the early stage of osteogenesis. Thus, fibroblasts could inhibit osteogenesis by regulating YAP localization in MSCs and secreting DKK1. CONCLUSIONS: Our research revealed that fibroblasts could modulate the nuclear-cytoplasmic shuttling of YAP in MSCs, thereby inhibiting their osteoblast differentiation. Fibroblasts could also secrete DKK1, which inhibited calcium nodule formation at the late stage of osteogenesis.

Humans , Animals , Mice , Osteogenesis/physiology , Mesenchymal Stem Cells , Osteoblasts , Cell Differentiation , Calcium , Cicatrix , Intercellular Signaling Peptides and Proteins , Fibroblasts
Neuroscience Bulletin ; (6): 453-465, 2023.
Article in English | WPRIM | ID: wpr-971570


Myelin-forming oligodendrocytes in the central nervous system (CNS) and Schwann cells in the peripheral nervous system (PNS) are essential for structural and functional homeostasis of nervous tissue. Albeit with certain similarities, the regulation of CNS and PNS myelination is executed differently. Recent advances highlight the coordinated regulation of oligodendrocyte myelination by amino-acid sensing and growth factor signaling pathways. In this review, we discuss novel insights into the understanding of differential regulation of oligodendrocyte and Schwann cell biology in CNS and PNS myelination, with particular focus on the roles of growth factor-stimulated RHEB-mTORC1 and GATOR2-mediated amino-acid sensing/signaling pathways. We also discuss recent progress on the metabolic regulation of oligodendrocytes and Schwann cells and the impact of their dysfunction on neuronal function and disease.

Amino Acids , Myelin Sheath/metabolism , Schwann Cells/metabolism , Oligodendroglia/metabolism , Signal Transduction , Intercellular Signaling Peptides and Proteins/metabolism
Journal of Southern Medical University ; (12): 975-984, 2023.
Article in Chinese | WPRIM | ID: wpr-987011


OBJECTIVE@#To investigate the expression of four-jointed box kinase 1 (FJX1) in gastric cancer (GC), its correlation with survival outcomes of the patients, and its role in GC progression.@*METHODS@#The expression level of FJX1 in GC tissues and normal gastric mucosal tissues and its correlation with the survival outcomes of GC patients were analyzed using TCGA and GEO database GC cohort. Immunohistochemistry was used to detect FJX1 expression level in clinical specimens of GC tissue, and its correlations with the patients' clinicopathological parameters and prognosis were analyzed. Bioinformatic analysis was performed to identify the potential pathways of FJX1 in GC. The effects of FJX1 overexpression or FJX1 silencing on GC cell proliferation and expressions of proliferation-related proteins, PI3K, AKT, p-PI3K, and p-AKT were evaluated using CCK-8 assay and Western blotting. The effect of FJX1 overexpression on GC cell tumorigenicity was evaluated in nude mice.@*RESULTS@#GC tissues showed significantly higher expressions of FJX1 mRNA and protein compared with normal gastric mucosa tissues (P < 0.05). The high expression of FJX1 was associated with poor prognosis of GC patients (P < 0.05) and served as an independent risk factor for poor survival outcomes in GC (P < 0.05). FJX1 was expressed mainly in the cytoplasm of GC cells in positive correlation with Ki67 expression (R=0.34, P < 0.05), and was correlated with CA199 levels, depth of tumor infiltration and lymph node metastasis of GC (P < 0.05). In the cell experiment, FJX1 level was shown to regulate the expressions of Ki67 and PCNA and GC cell proliferation (P < 0.05). Gene set enrichment analysis indicated that the PI3K/AKT pathway potentially mediated the effect of FJX1, which regulated the expressions of PI3K and AKT and their phosphorylated proteins. In nude mice, FJX1 overexpression in GC cells significantly promoted the growth of the transplanted tumors (P < 0.05).@*CONCLUSION@#FJX1 is highly expressed in GC tissues and is correlated with poor prognosis of GC patients. FJX1 overexpression promotes GC cell proliferation through the PI3K/AKT signaling pathway, and may serve as a potential prognostic biomarker and therapeutic target for GC.

Animals , Mice , Humans , Cell Proliferation , Ki-67 Antigen , Mice, Nude , Phosphatidylinositol 3-Kinases , Proto-Oncogene Proteins c-akt , Signal Transduction , Stomach Neoplasms/pathology , Intercellular Signaling Peptides and Proteins/genetics
Chinese journal of integrative medicine ; (12): 500-507, 2023.
Article in English | WPRIM | ID: wpr-982274


OBJECTIVE@#To elucidate the renoprotective effect of resveratrol (RSV) on sphingosine kinase 1 (SphK1) signaling pathway and expression of its downstream molecules including activator protein 1 (AP-1) and transformation growth factor-β1 (TGF-β1) in lipopolysaccharide (LPS)-induced glomerular mesangial cells (GMCs).@*METHODS@#The rat GMCs line (HBZY-1) were cultured and randomly divided into 5 groups, including control, LPS (100 ng/mL), and 5, 10, 20 µmol/L RSV-treated groups. In addition, SphK1 inhibitor (SK-II) was used as positive control. GMCs were pretreated with RSV for 2 h and treated with LPS for another 24 h. GMCs proliferation was determined by 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyl tetrazolium bromide (MTT) assay. The proteins expression of SphK1, p-c-Jun and TGF-β1 in GMCs were detected by Western blot, and DNA-binding activity of AP-1 was performed by electrophoretic mobility shift assay (EMSA). The binding activity between RSV and SphK1 protein was detected by AutoDock Vina and visualized by Discovery Studio 2016.@*RESULTS@#LPS could obviously stimulate GMCs proliferation, elevate SphK1, p-c-Jun and TGF-β1 expression levels and increase the DNA-binding activity of AP-1 (P<0.05 or P<0.01), whereas these effects were significantly blocked by RSV pretreatment. It was also suggested that the effect of RSV was similar to SK-II (P>0.05). Moreover, RSV exhibited good binding affinity towards SphK1, with docking scores of -8.1 kcal/moL and formed hydrogen bonds with ASP-178 and LEU-268 in SphK1.@*CONCLUSION@#RSV inhibited LPS-induced GMCs proliferation and TGF-β1 expression, which may be independent of its hypoglycemic effect on preventing the development of mesangial cell fibrosis and closely related to the direct inhibition of SphK1 pathway.

Animals , Rats , Lipopolysaccharides/pharmacology , Mesangial Cells , Resveratrol/pharmacology , Transcription Factor AP-1 , Transforming Growth Factor beta1 , Intercellular Signaling Peptides and Proteins , Cell Proliferation , DNA , Cells, Cultured
Journal of Experimental Hematology ; (6): 377-382, 2023.
Article in Chinese | WPRIM | ID: wpr-982069


OBJECTIVE@#To investigate the clinical significance of SFRP1 gene and its methylation in childhood acute lymphoblastic leukemia (ALL) .@*METHODS@#Methylation-specific PCR (MSP) was used to detect the methylation status of SFRP1 gene in bone marrow mononuclear cells of 43 children with newly diagnosed ALL before chemotherapy (primary group) and when the bone marrow reached complete remission d 46 after induction of remission chemotherapy (remission group), the expression of SFRP1 mRNA was detected by quantitative real-time polymerase chain reaction (qRT-PCR), the expression of SFRP1 protein was detected by Western blot, and clinical data of children were collected, the clinical significance of SFRP1 gene methylation in children with ALL was analyze.@*RESULTS@#The positive rate of SFRP1 gene promoter methylation in the primary group (44.19%) was significantly higher than that in the remission group (11.63%) (χ2=11.328, P<0.05). The relative expression levels of SFRP1 mRNA and protein in bone marrow mononuclear cells of children in the primary group were significantly lower than those in the remission group (P<0.05). Promoter methylation of SFRP1 gene was associated with risk level (χ2=15.613, P=0.000) and survival of children (χ2=6.561, P=0.010) in the primary group, children with SFRP1 hypermethylation had significantly increased risk and shortened event-free survival time, but no significant difference in other clinical data.@*CONCLUSION@#Hypermethylation of SFRP1 gene promoter may be involved in the development of childhood ALL, and its hypermethylation may be associated with poor prognosis.

Child , Humans , Clinical Relevance , DNA Methylation , Precursor Cell Lymphoblastic Leukemia-Lymphoma/genetics , Bone Marrow/metabolism , RNA, Messenger/metabolism , Membrane Proteins/genetics , Intercellular Signaling Peptides and Proteins/metabolism
Acta Academiae Medicinae Sinicae ; (6): 500-505, 2023.
Article in Chinese | WPRIM | ID: wpr-981297


Tissue regeneration is an important engineering method for the treatment of oral soft and hard tissue defects.Growth factors,as one of the three elements of tissue regeneration,are a necessary condition for tissue regeneration.Concentrated growth factor(CGF)is a new generation of blood extract prepared by changing the centrifugal speed on the basis of the preparation of platelet-rich plasma(PRP)and platelet-rich fibrin(PRF).It contains abundant growth factors and a fibrin matrix with a three-dimensional network structure,being capable of activating angiogenesis and promoting tissue regeneration and healing.CGF has been widely used in the repair and regeneration of oral soft and hard tissues.This paper introduces the preparation and composition of CGF and reviews the application of CGF in oral implantation and the regeneration of oral bone tissue,periodontal tissue,and dental pulp tissue.

Platelet-Rich Plasma/metabolism , Platelet-Rich Fibrin , Cell Proliferation , Bone and Bones , Intercellular Signaling Peptides and Proteins/metabolism , Bone Regeneration
Rev. cir. traumatol. buco-maxilo-fac ; 22(1): 49-55, jan.-mar. 2022. ilus, tab
Article in Portuguese | LILACS, BBO | ID: biblio-1392234


Introdução: As limitações das terapias atuais para doenças degenerativas da articulação temporomandibular (ATM) levaram ao aumento do interesse em estratégias regenerativas. A engenharia de tecidos (ET), combinando células-tronco, arcabouços e fatores de crescimento, pode fornecer uma substituição biológica funcional e permanente das estruturas da ATM, além de prevenir o avanço de doenças degenerativas. Objetivo: Este artigo descreve as perspectivas atuais da ET das estruturas da ATM em modelos animais. Metodologia: As abordagens da ET foram categorizadas de acordo com as estruturas primárias da ATM: 1) o disco articular, 2) o côndilo mandibular e 3) a fossa glenóide e eminência articular. Resultados: As áreas com a maior quantidade de estudos são o côndilo mandibular e disco articular, em estudos que abordam o uso de arcabouços tridimensionais, de origem sintética e/ou natural, podendo ou não estar associados a células tronco (diferenciadas ou não) e a fatores de crescimento. Conclusão: A ET da ATM ainda é uma área relativamente nova, em desenvolvimento e em constante avanço. Os avanços tecnológicos desenvolvidos nessa área têm o potencial de auxiliar no desenvolvimento de terapias mais eficientes e menos invasivos... (AU)

Introducción: Las limitaciones de las terapias actuales para las enfermedades degenerativas de la articulación temporomandibular (ATM) han llevado a un mayor interés en las estrategias regenerativas. La ingeniería de tejidos, que combina células, andamios y factores de crecimiento, puede proporcionar un reemplazo biológico funcional y permanente de las estructuras de la ATM, además de prevenir el avance de enfermedades degenerativas. Objetivo: Este artículo describe las perspectivas actuales de la ingeniería de tecidos de las estructuras de la ATM en modelos animales. Metodología: Los enfoques de ingeniería de tejidos se clasificaron según las estructuras primarias de la ATM: 1) el disco articular, 2) el cóndilo mandibular y 3) la fosa glenoidea y la eminencia articular. Resultados: Las áreas con mayor número de estudios son el cóndilo mandibular y el disco articular, en estudios que abordan el uso de estructuras tridimensionales, de origen sintético y/o natural, que pueden o no estar asociadas a células (diferenciadas o no) y con factores de crecimiento. Conclusión: La ingeniería de tejidos de la ATM es todavía un área relativamente nueva, en desarrollo y en constante avance. Los avances tecnológicos desarrollados en esta área tienen el potencial de ayudar en el desarrollo de terapias más eficientes y menos invasivas... (AU)

Introduction: The limitations of current therapies for degenerative diseases of the temporomandibular joint (TMJ) have led to increased interest in regenerative strategies. Tissue engineering (TE), combining stem cells, scaffolds, and growth factors, can provide a functional and permanent biological replacement of TMJ structures, in addition to preventing the advancement of degenerative diseases. Aim: This article describes current TE perspectives of TMJ structures in animal models. Methods: TE approaches were categorized according to the primary TMJ structures: 1) the articular disc, 2) the mandibular condyle, and 3) the glenoid fossa and articular eminence. Results: The areas with the greatest number of studies are the mandibular condyle and articular disc, in studies that address the use of three-dimensional scaffolds, of synthetic and/ or natural origin, which may or may not be associated with stem cells (differentiated or not) and with growth factors. Conclusion: TE of the TMJ is still a relatively new, developing, and constantly advancing area. The technological advances developed in this area have the potential to assist in the development of more efficient and less invasive therapies... (AU)

Animals , Stem Cells , Temporomandibular Joint , Cells , Models, Animal , Tissue Engineering , Intercellular Signaling Peptides and Proteins , Growth and Development , Biological Products , Technological Development , Mandibular Condyle
NOVA publ. cient ; 20(3): [17], 2022 enero-junio. gráficos, mapas, tablas e ilustraciones
Article in Spanish | LILACS | ID: biblio-1397023


Resumen Introducción. Las células madre mesenquimales han generado interés en la ingeniería de tejidos, debido a sus propiedades proliferativas y capacidad de reparación de tejidos, sin embargo, para un trasplante exitoso, es necesario aumentar el número de células mediante un cultivo in-vitro. Durante este proceso la capacidad proliferativa disminuye, provocando cambios en la morfología y funcionalidad celular y afectando la viabilidad del cultivo, este estado se conoce como senescencia celular y como posibles causales, se ha considerado el estrés oxidativo y la falta de factores de crecimiento. Objetivos: Evaluar el efecto de FGF-2 sobre la senescencia de un cultivo de células madre mesenquimales aisladas de gelatina de Wharton y su papel en la regulación del estrés oxidativo. Metodología. Se añadieron dosis de 3,5 y 7,5 ng de FGF-2 al cultivo. Durante los pasajes 5 y 7, se estimó tanto la senescencia celular como la presencia de ROS (especies reactivas de oxígeno). Resultados.Se obtuvo en el pasaje 5, una diferencia significativa del 99,5% entre el control (+) con respecto a los tratamientos con FGF-2, sin embargo, en el pasaje 7 se observó un aumento en la producción de la enzima ß-galactosidasa y cambios morfológicos, confirmando un estado senescente en el cultivo en todos los tratamientos evaluados. Conclusión. Las dosis utilizadas en este estudio contribuyeron positivamente a disminuir el proceso senescente en el cultivo celular, además se determinó, que el FGF-2 puede prolongar el tiempo de cultivo, retardando parcialmente la concentración de especies reactivas de oxígeno

AbstractIntroduction. Mesenchymal stem cells have been generated interest in tissue engineering, due to their proliferative properties and tissue repair capacity, however, for a successful transplant process, it is necessary to increase the number of cells in a culture expansion process. During this process the proliferative capacity is limited, causing changes in cell morphology and functionality affecting the viability of the culture, this state is known as cell senescence. Oxidative stress and deregulation of growth factors are considered as reasons. Aims. To evaluate the effect of FGF-2 on the senescence of a mesenchymal stem cells culture isolated from Wharton ́s jelly and its role in the regulation of oxidative stress. Methodology: 3,5 and 7,5 ng doses of FGF-2 were added to the culture medium from passage 2, then the senescence of the culture was evaluated and the presence of reactive oxygen species was determined during passages 5 and 7. Results. We observed that in passage 5, there is a significant difference 99.5% between the control (+) concerning the FGF-2 treatments, however, in passage 7, an increase in the production of the enzyme ß-galactosidase was observed and changes in morphology such as: increase in size and elongated shape of the cell, confirming a senescent state on the culture in all the treatments evaluated. Conclusion. The doses used in this study contributed positively to decrease this process in a cell culture, also, the FGF- 2 can prolong the cultivation time, partially decreasing the concentration of reactive oxygen species

Humans , Mesenchymal Stem Cells , Fibroblast Growth Factor 2 , Intercellular Signaling Peptides and Proteins , Wharton Jelly
Chinese Journal of Burns ; (6): 691-696, 2022.
Article in Chinese | WPRIM | ID: wpr-940976


Wound repair is a highly coordinated and mutually regulated complex process involving various kinds of cells, extracellular matrices and cytokines. A variety of growth factors play an important regulatory role in wound healing, and it is critical to achieve effective delivery and sustained function of growth factors. In recent years, the application of biomaterials in tissue engineering has shown great potential, and the effective delivery of growth factors by biomaterials has attracted increasing attention. Based on this, this paper introduces the mechanism of related growth factors in the process of wound healing, focusing on the recent progress of biomaterial delivery of growth factors to accelerate wound healing, in order to provide new enlightenment for clinical wound treatment.

Biocompatible Materials/metabolism , Extracellular Matrix/metabolism , Intercellular Signaling Peptides and Proteins/therapeutic use , Tissue Engineering , Wound Healing
Chinese Journal of Burns ; (6): 610-615, 2022.
Article in Chinese | WPRIM | ID: wpr-940968


Growth factors play an important role in wound healing, and they mainly accelerate wound healing by activating the related signal pathways. Chinese scientists have been conducting basic and clinical researches on growth factors for 30 years, with a series of growth factor drugs being developed and widely used in the treatment of burns and trauma and chronic refractory ulcers. This paper expounds the frontier progress of growth factors on wound healing from the perspectives of immunity, nerve, fat, and so on, and puts forward the further thoughts of the research team on the regulation of wound healing by growth factors.

Humans , Burns/therapy , Intercellular Signaling Peptides and Proteins/therapeutic use , Signal Transduction , Wound Healing
Arq. bras. cardiol ; 117(4): 715-725, Oct. 2021. tab, graf
Article in Portuguese | LILACS | ID: biblio-1345249


Resumo Fundamentos A L-carnitina (LC) tem muitos efeitos benéficos em animais diabéticos e humanos, mas seu efeito regulatório sobre a quemerina como uma citocina inflamatória e seu receptor no estado diabético são desconhecidos. Objetivos O presente estudo teve como objetivo investigar o efeito regulatório da LC na expressão do receptor semelhante ao de quimiocina 1 e quemerina (CMKLRI) em tecidos adiposo e cardíaco de camundongos diabéticos. Métodos Sessenta camundongos NMARI foram divididos em quatro grupos, incluindo controle, diabético, diabético + suplementação com LC e controle + suplementação com LC. O diabetes foi induzido pela alimentação dos animais com dieta hipercalórica por 5 semanas e injeção de estreptozotocina. Os animais foram tratados com 300 mg/kg de LC por 28 dias. Nos dias 7, 14 e 28 após o tratamento, os níveis de mRNA e proteína da quemerina e CMKLRI nos tecidos cardíacos e adiposos de animais foram determinados utilizando análise por qPCR e ELISA. Os índices de resistência à insulina também foram medidos em todos os grupos experimentais. A diferença com p<0,05 foi considerada significativa. Resultados A expressão de quemerina e CMKLRI aumentou nos tecidos cardíaco e adiposo de camundongos diabéticos nos dias 14 e 28 após a indução do diabetes, concomitantemente com a incidência de resistência à insulina e níveis aumentados de quemerina circulante (p<0,05). O tratamento com LC causou uma diminuição significativa na expressão de ambos os genes nos tecidos estudados e redução dos sintomas de resistência à insulina e dos níveis séricos de quemerina (p<0,05). Conclusão Os resultados sugerem que o tratamento com LC pode diminuir a expressão de quemerina e CKLR1 em tecidos cardíacos e adiposos de animais experimentais obesos e diabéticos.

Abstract Background L-carnitine (LC) has many beneficial effects on diabetic animals and humans, but its regulatory effect on chemerin as an inflammatory cytokine, and its receptor in diabetes status is unknown. Objectives The present study aimed to investigate the regulatory effect of LC on the expression of chemerin and chemokine-like receptor I (CMKLRI) in adipose and cardiac tissues of diabetic mice. Methods Sixty NMARI mice were divided into four groups including control, diabetic, diabetic + LC supplementation and control + LC supplementation. Diabetes was induced by feeding the animals a high-calorie diet for 5 weeks and injection of Streptozotocin. The animals were treated with 300 mg/kg LC for 28 days. On days 7, 14, and 28 after treatment, the mRNA and protein levels of chemerin and CMKLRI in the cardiac and adipose tissues of the animals were determined using qPCR analysis and ELISA. Insulin resistance indices were also measured in all experimental groups. Differences with p <0.05 were considered significant. Results Chemerin and CMKLRI expressions levels were increased in cardiac and adipose tissues of diabetic mice on days 14 and 28 after diabetes induction, concurrent with the incidence of insulin resistance and increased levels of circulating chemerin (p<0.05). The treatment with LC caused a significant decrease in the expression of both genes in studied tissues and the reduction of insulin resistance symptoms and serum chemerin levels (p<0.05). Conclusion The results suggest that LC treatment were able to downregulate the expression of chemerin and CKLR1 in cardiac and adipose tissues of obese, diabetic experimental animals.

Animals , Mice , Receptors, Chemokine , Diabetes Mellitus, Experimental/drug therapy , Carnitine/pharmacology , Chemokines , Intercellular Signaling Peptides and Proteins , Mice, Obese , Obesity/drug therapy
Arq. bras. oftalmol ; 84(3): 282-296, May-June 2021. tab, graf
Article in English | LILACS | ID: biblio-1248965


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)

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
Rev. Ciênc. Méd. Biol. (Impr.) ; 20(1): 101-111, maio 5, 2021. fig, ilus
Article in Portuguese | LILACS | ID: biblio-1354993


Introdução: o plasma rico em plaquetas é definido como um concentrado de plaquetas autólogas, obtido por centrifugação de sangue total. Trata-se de uma técnica inovadora, simples e de baixo custo, que apresenta muitos benefícios, podendo ser aplicada em diferentes áreas da saúde. Objetivo: a presente pesquisa buscou desenvolver um protocolo operacional padrão para obtenção e aplicação do plasma sanguíneo rico em plaquetas para o tratamento de alterações estéticas faciais. Metodologia: o estudo tratou de uma pesquisa de campo experimental, de caráter qualitativo e quantitativo. Um processo seletivo foi realizado para recrutar pacientes voluntários para o estudo, que foram selecionados de acordo com os critérios de inclusão e exclusão. Através de testes foi possível chegar ao tempo de centrifugação e velocidade ideais para a produção do plasma rico em plaquetas e testá-lo no tratamento de alterações estéticas faciais. Resultados e discussão: as principais mudanças que foram notadas pelos pacientes durante e após o tratamento foram a redução das cicatrizes de acne e aumento da hidratação e viscosidade da pele. A melhora das alterações estéticas tratadas foi notada por 100% dos pacientes, não havendo piora em nenhum paciente. Conclusão: com base nos testes e resultados obtidos, foi possível padronizar um protocolo operacional padrão ideal para a obtenção e aplicação do plasma rico em plaquetas, comprovando sua eficácia no tratamento de alterações estéticas faciais como rugas, flacidez, linhas de expressões acentuadas, acne, cicatrizes de acne, além de ter-se observado uma melhora significativa na hidratação da pele e redução de poros dilatados.

Introduction: platelet-rich plasma is defined as a concentrate of autologous platelets, obtained by centrifuging whole blood. It is an innovative, simple and low-cost technique that has many benefits, and can be applied in different areas of health. Objective: the present research sought to develop a standard operating protocol for obtaining and applying platelet-rich blood plasma for the treatment of facial aesthetic changes. Metodology: the study was a qualitative and quantitative field research. A selection process was carried out to recruit volunteer patients for the study, who were selected according to the inclusion and exclusion criteria. Through tests it was possible to reach the ideal centrifugation time and speed for the production of platelet-rich plasma and to test it in the treatment of facial aesthetic changes. Results and discussion: the main changes that were noted by patients during and after treatment were the reduction of acne scars and increased hydration and skin viscosity. The improvement of the aesthetic changes treated was noticed by 100% of the patients, with no worsening in any patient. Conclusion: based on the tests and results obtained, it was possible to standardize an ideal standard operating protocol for obtaining and applying platelet-rich plasma, proving its effectiveness in the treatment of facial aesthetic changes such as wrinkles, sagging, accentuated expression lines, acne, scars from acne, in addition to a significant improvement in skin hydration and reduction of enlarged pores.

Humans , Male , Female , Adult , Middle Aged , Therapeutics , Intercellular Signaling Peptides and Proteins , Esthetics , Platelet-Rich Plasma , Cicatrix , Acne Vulgaris , Evaluation Studies as Topic
Arq. gastroenterol ; 58(1): 55-60, Jan.-Mar. 2021. tab, graf
Article in English | LILACS | ID: biblio-1248983


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.

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
Repert. med. cir ; 30(1): 13-21, 2021. Ilus., tab.
Article in English | COLNAL, LILACS | ID: biblio-1281415


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.

Pituitary Neoplasms/genetics , Intercellular Signaling Peptides and Proteins , Intercellular Signaling Peptides and Proteins/metabolism , Pituitary Diseases/genetics , Pituitary Diseases/metabolism , Pituitary Neoplasms/metabolism , Adenoma/genetics , Adenoma/metabolism
Acta Academiae Medicinae Sinicae ; (6): 173-179, 2021.
Article in Chinese | WPRIM | ID: wpr-878716


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

Humans , Biomarkers, Tumor , Carcinoma, Pancreatic Ductal , GPI-Linked Proteins , Intercellular Signaling Peptides and Proteins , Neoplasm Proteins/genetics , Pancreatic Neoplasms , Prognosis
Journal of Central South University(Medical Sciences) ; (12): 1063-1070, 2021.
Article in English | WPRIM | ID: wpr-922585


OBJECTIVES@#The biomarkers targeting colorectal cancer (CRC) prognosis are short of high accuracy and sensitivity in clinic. Through bioinformatics analysis, we aim to identify and confirm a series of key genes referred to the diagnosis and prognosis of CRC.@*METHODS@#GSE31905, GSE35279, and GSE41657 were selected as complete RNA sequencing data sets of CRC and colorectal mucosa (CRM) tissues from the NCBI-GEO database, and the differentially expressed genes (DEGs) were analyzed. The common DEGs in these 3 data sets were obtained by Venn map, and enriched by STRING network system and Cytoscape software. The Kaplan-Meier plotter website was used to verify the correlation between the enriched genes and the prognosis of CRC.@*RESULTS@#For the whole RNA sequencing data sets of CRC and normal intestinal mucosa samples, the DEGs of CRC and CRM in the 3 data sets (|log@*CONCLUSIONS@#The above 11 genes verified by bioinformatics retrieval and analysis can predict the poor prognosis of CRC to a certain extent, and they provide a possible target for the diagnosis and treatment of CRC.

Humans , Biomarkers, Tumor/metabolism , Colorectal Neoplasms/genetics , Computational Biology , Formins , Gene Expression Profiling , Gene Expression Regulation, Neoplastic , Glycoproteins , Intercellular Signaling Peptides and Proteins , Oncogenes , Prognosis , Protein Interaction Maps
Medicentro (Villa Clara) ; 24(4): 785-804, oct.-dic. 2020.
Article in Spanish | LILACS | ID: biblio-1143246


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.

Tissue Engineering , Intercellular Signaling Peptides and Proteins , Regenerative Medicine , Placenta Growth Factor
Rev. ADM ; 77(6): 287-294, nov.-dic. 2020. ilus, tab
Article in Spanish | LILACS | ID: biblio-1150870


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)

Humans , Male , Female , Adult , Middle Aged , Aged , Carcinoma, Squamous Cell/immunology , Fibroblast Growth Factor 1 , Vascular Endothelial Growth Factor A , Blood Vessels , Immunohistochemistry , Histological Techniques , Intercellular Signaling Peptides and Proteins , Receptor, Fibroblast Growth Factor, Type 1 , Endoglin , Mexico