Hyaluronic acid-mediated epithelial-mesenchymal transition of human lens epithelial cells via CD44 and TGF-β2

ABSTRACT Purpose: The epithelial-mesenchymal transition of human lens epithelial cells plays a role in posterior capsule opacification, a fibrotic process that leads to a common type of cataract. Hyaluronic acid has been implicated in this fibrosis. Studies have investigated the role of transforming growth factor (TGF)-β2 in epithelial-mesenchymal transition. However, the role of TGF-β2 in hyaluronic acid-mediated fibrosis of lens epithelial cell remains unknown. We here examined the role of TGF-β2 in the hyaluronic acid-mediated epithelial-mesenchymal transition of lens epithelial cells. Methods: Cultured human lens epithelial cells (HLEB3) were infected with CD44-siRNA by using the Lipofectamine 3000 transfection reagent. The CCK-8 kit was used to measure cell viability, and the scratch assay was used to determine cell migration. Cell oxidative stress was analyzed in a dichloro-dihydro-fluorescein diacetate assay and by using a flow cytometer. The TGF-β2 level in HLEB3 cells was examined through immunohistochemical staining. The TGF-β2 protein level was determined through western blotting. mRNA expression levels were determined through quantitative real-time polymerase chain reaction. Results: Treatment with hyaluronic acid (1.0 μM, 24 h) increased the epithelial-mesenchymal transition of HLEB3 cells. The increase in TGF-β2 levels corresponded to an increase in CD44 levels in the culture medium. However, blocking the CD44 function significantly reduced the TGF-β2-mediated epithelial-mesenchymal transition response of HLEB3 cells. Conclusions: Our study showed that both CD44 and TGF-β2 are critical contributors to the hyaluronic acid-mediated epithelial-mesenchymal transition of lens epithelial cells, and that TGF-β2 in epithelial-mesenchymal transition is regulated by CD44. These results suggest that CD44 could be used as a target for preventing hyaluronic acid-induced posterior capsule opacification. Our findings suggest that CD44/TGF-β2 is crucial for the hyaluronic acid-induced epithelial-mesenchymal transition of lens epithelial cells.

Management and repair strategies for abdominal perforations during abdominoplasty innovative techniques and clinical outcomes: a systematic review

Current suture advancements in abdominoplasty and abdominal perforation repair have enhanced surgical outcomes. Innovations include antimicrobial sutures, which use agents like triclosan and silver nanoparticles to reduce surgical site infections without compromising suture integrity. Drug-eluting sutures release therapeutic agents directly at the wound site promote healing and reducing the need for systemic medications. Bioactive sutures and those seeded with stem cells aid tissue regeneration promising confirmed success in complex surgeries. Smart sutures featuring shape-memory polymers and electronic sutures that monitor physiological parameters represent cutting-edge developments. Barbed sutures eliminate the need for knots, distribute tension evenly, and decrease operative time. Mesh repair techniques come with biocompatible materials enhancing tissue integration and reducing complications. Endoscopic and laparoscopic approaches augmented by artificial intelligence and have further refined abdominal perforation repairs and offer superior outcomes. Fibrin sealants and adhesives have also seen improvements in efficacy, safety, and biocompatibility, with advances in synthetic alternatives and bioactive formulations further enhancing surgical success.

Terata catadidyma conjoined twins: how early you can diagnose

A conjoined twin is a complex process end-result considered to be caused by either delayed splitting of the fertilized ovum or fusion of the embryonic stem cells. Disorganization of mutant genes is believed to be a cause in some cases. Conjoined twins are described as having been physically fused during pregnancy and delivery. Division after 14th day of fertilization, results in an incomplete division, because once it becomes an embryo, it is incapable of fusion. The later the division, the more severe the effect. Conjoined twins were first mentioned a long time ago when there was not much known about this. They share some organs that are vital for survival, like the heart; these twins are almost impossible to save, but there are some cases wherein there is evidence of their survival. Current technology is providing a basis for earlier diagnosis and a better prognosis. MRI and CT scan provide excellent anatomic details later in pregnancy, demonstrating organ position, shared viscera, and vascular anatomy. We present a case of live Terata Catadidyma (which refers to twins joined in the lower portion of their body, or they may appear to be two bodies on top and one body on the bottom), diagnosed at 7 weeks and 3 days by non-invasive ultrasonography, hardly reported previously so early in the literature. This reported conjoined twin were having defect in occipital region of neurocranium (forming calvarium) which should have produced encephalocele later. So, early diagnosis inflicts much less physical and psychological trauma to parents concerning viability and pregnancy outcome in long run.

Follicular unit grafting in chronic ulcers: a valuable technique for integrated management

Abstract Chronic ulcers significantly affect the quality of life of patients and impose a high cost on the healthcare system. The therapeutic management should be comprehensive, taking into consideration the etiological diagnosis of the wound and the characteristics of the wound bed when deciding on a therapeutic proposal appropriate to the healing phase, correcting factors that delay healing. During the epithelialization phase, repair techniques with grafts are recommended to shorten re-epithelialization time, improve the quality of scar tissue, and achieve adequate pain management. Currently, due to the reported benefits of skin appendages, the technique of follicular unit auto-grafting obtained with a scalp punch is among the chosen strategies for wound repair. This is a minimally invasive, outpatient practice, whose technique has advantages over the donor site, patients recovery and well-being.

Morphological and Morphometric Analysis, Apoptosis and Oxidative Stress Study in Hep 2 Cells Treated by Resveratrol or Quercetine / Análisis Morfológico y Morfométrico, Estudio de Apoptosis y Estrés Oxidativo en Células Hep 2 Tratadas con Resveratrol o Quercetina

SUMMARY: Resveratrol (RES) and quercetine (QRC), is a promising agent relevant for both cancer chemoprevention and treatment via several signaling pathways, involved in their anticancer activity related to its chemotherapeutic potential, associated with the induction of ROS generation in cancer cells, leading to apoptosis. In our study, we have summarized the mechanisms of action of RES and QRC, and their pharmacological implications and potential therapeutic applications in cancer therapy. After treatment of Hep 2 cells with QRC or RES, the death pathways such as the cytochrome c release, ERK1/2 and IRS-1 pathways were upregulated, while cell survival pathway, including PI3K/AKT were downregulated. The RES and QRC caused oncosis, cells hypertrophy, hypercondensatin of chromatin, rupture of the plasma membrane and nuclear membrane, and formation of apoptotic bodies. Morphometric measurements of some cellular and nuclear parameters showed that RES and QRC induced an increase in cells and nuclear size, the nucleocytoplasmic ratio remained below 1 (N-Cyt R < 1), sign of low nuclear activity. The RES and QRC induced apoptosis of Hep2 cells by increasing of oxidative stress markers, MDA, and by modulating detoxifying enzymes, CAT and SOD. Our study results prove antiproliferative and proapoptotic properties of quercetin and resveratrol with regard to larynx cancer.

Resveratrol (RES) y quercetina (QRC), es un agente prometedor y relevante tanto para la quimioprevención como para el tratamiento del cáncer a través de varias vías de señalización, involucrado en su actividad anticancerígena relacionada con su potencial quimioterapéutico, asociado con la inducción de la generación de especies reactivas del oxígeno (ROS) en células cancerosas, lo que lleva a apoptosis. En nuestro estudio, hemos resumido los mecanismos de acción de RES y QRC, y sus implicaciones farmacológicas y posibles aplicaciones terapéuticas en la terapia del cáncer. Después del tratamiento de las células Hep 2 con QRC o RES, las vías de muerte, tal como la liberación de citocromo c, las vías ERK1/2 e IRS-1, se regulaban positivamente, mientras que la vía de supervivencia celular, incluida PI3K/AKT, se regulaba negativamente. El RES y el QRC provocaron oncosis, hipertrofia celular, hipercondensación de la cromatina, rotura de la membrana plasmática y nuclear y formación de cuerpos apoptóticos. Las mediciones morfométricas de algunos parámetros celulares y nucleares mostraron que RES y QRC indujeron un aumento en las células y el tamaño nuclear, la proporción nucleocitoplasmática se mantuvo por debajo de 1 (N- Cyt R <1), signo de baja actividad nuclear. RES y QRC indujeron la apoptosis de las células Hep2 aumentando los marcadores de estrés oxidativo, MDA, y modulando las enzimas desintoxicantes, CAT y SOD. Los resultados de nuestro estudio demuestran las propiedades antiproliferativas y proapoptóticas de la quercetina y el resveratrol con respecto al cáncer de laringe.

Key clinical predictors in the diagnosis of ovarian torsion in children

Abstract Objective: Ovarian torsion (OT) represents a severe gynecological emergency in female pediatric patients, necessitating immediate surgical intervention to prevent ovarian ischemia and preserve fertility. Prompt diagnosis is, therefore, paramount. This retrospective study set out to assess the utility of combined clinical, ultrasound, and laboratory features in diagnosing OT. Methods: The authors included 326 female pediatric patients aged under 14 years who underwent surgical confirmation of OT over a five-year period. Logistic regression analysis was employed to pinpoint factors linked with OT, and the authors compared clinical presentation, laboratory results, and ultrasound characteristics between patients with OT (OT group) and without OT (N-OT group). The authors conducted receiver operating characteristic (ROC) curve analysis to gauge the predictive capacity of the combined features. Results: Among 326, OTwas confirmed in 24.23 % (79 cases) of the patients. The OT group had a higher incidence of prenatal ovarian masses than the N-OT (22 cases versus 7 cases) (p < 0.0001). Similarly, the authors observed significant differences in the presence of lower abdominal pain, suspected torsion on transabdominal ultrasound, and a high neutrophil-lymphocyte ratio (NLR > 3) between the OTand non-OT groups (p < 0.05). Furthermore, when these parameters were combined, the resulting area under the curve (AUC) was 0.868, demonstrating their potential utility in OT diagnosis. Conclusion: This study demonstrates a prediction model integrating clinical, laboratory, and ultrasound findings that can support the preoperative diagnosis of ovarian torsion, thereby enhancing diagnostic precision and improving patient management. Future prospective studies should concentrate on developing clinical predictive models for OTin pediatric patients.

Protective effect of trans-nerolidol on vascular endothelial cell injury induced by lipopolysaccharides / Efectos protectores del trans-nerolidol en lesiones inducidas por lipopolisacáridos en células endoteliales vasculares

This article aimed to discuss the protection of trans - nerolidol on vascular endothelial cells (ECs) injured by lipopolysac charides. ECs were divided into four groups: normal, model, low and high dose trans - nerolidol treatment groups. The cell survival rate and the contents of NO in the cell culture supernatant were determined. The protein expression and transcript level of pe roxisome proliferator - activated receptor - γ (PPARγ), endothelial nitric oxide synthase (eNOS), and inducible nitric oxide synthase (iNOS) were determined by western blotting and RT - PCR respectively. Compared with the normal group, cell livability, protein e xpression and mRNA transcript level of PPARγ and eNOS decreased, NO contents, protein expression and mRNA transcript tlevel of iNOS increased in model group significantly. Compared with model group, all the changes recovered in different degree in treatmen t groups. Hence, it was concluded that trans - nerolidol can alleviate the ECs injuryby the regulation of iNOS/eNOS through activating PPARγ in a dose - dependent manner

Este artículo tiene como objetivo discutir la protección del trans - nerolidol en las células endoteliales vasculares (CE) dañadas por lipopolisacáridos. Las CE se di vidieron en cuatro grupos: normal, modelo, grupos de tratamiento con trans - nerolidol de baja y alta dosis. Se determinó la tasa de supervivencia de las células y los contenidos de óxido nítrico (NO) en el sobrenadante del cultivo celular. La expresión de p roteínas y el nivel de transcripción del receptor activado por proliferadores de peroxisomas - γ (PPARγ), el óxido nítrico sint et asa endotelial (eNOS) y el óxido nítrico sint et asa inducible (iNOS) se determinaron mediante western blot y RT - PCR, respectivamen te. En comparación con el grupo normal, la viabilidad celular, la expresión de proteínas y el nivel de transcripción de PPARγ y eNOS disminuyeron, los contenidos de NO, la expresión de proteínas y el nivel de transcripción de iNOS aumentaron significativam ente en el grupo modelo. En comparación con el grupo modelo, todos los cambios se recuperaron en diferentes grados en los grupos de tratamiento. Por lo tanto, se concluyó que el trans - nerolidol puede aliviar el daño en las CE regulando iNOS/eNOS a través d e la activación de PPARγ de manera dependiente de la dosis.

Disseminated juvenile xanthogranuloma secondary to chemotherapeutic treatment of acute lymphoblastic leukemia

Juvenile xanthogranuloma is a benign, reactive, self-limiting disorder within the non-Langerhans cell histiocytosis group. It primarily affects infants and preschoolers, and occasionally in adults. Some cases report concurrent non-LCH and leukemia, with bone marrow being the second common pathology. We present a case of JXG with acute lymphoblastic leukemia in a 17-year-old male. Emphasizing the importance of considering the possibility of apparently disparate disorders in a patient, especially with unusual clinical findings.

Effect of Cucumber (Cucumis sativus) Fruit Homogenate on Hypotonicity� induced Haemolysis of Red Blood Cell

Background: Several findings and reports show that people with high intake of Cucumis sativus (Cucumber) have relief in pains, swelling and other inflammatory signs. Human red blood cell membrane stabilization has been used as a method to investigate the mechanism of action of anti-inflammatory drugs. The anti-inflammatory activity of cucumber has been demonstrated in previous study. In this study, we aimed at assessing the effect of cucumber (Cucumis sativus) fruit homogenate on hypotonicity � induced haemolysis of red blood cell.Methods: Whole fresh blood (3 ml) was collected from healthy volunteer into plastic tubes containing 0.1 volume of 3.8% trisodium citrate and used within 8 hr. The blood sample was centrifuged at 3000 x g for 10 min and the supernatant (plasma) discarded. The pellet was washed twice by resuspending in a volume of normal saline equal to the volume of the supernatant (plasma) and centrifuged at 3000 x g for 10 min. The pellet (0.1 ml) was resuspended in 2.5 ml of normal saline and used as the red blood cell (RBC).Results: The results revealed that cucumber (Cucumis sativus) fruit homogenate significantly (p ? 0.05) inhibited hypotonicity-induced red blood cell haemolysis when compared to indomethacin (a known standard drug).Conclusion: Cucumber has membrane stabilization effect on the red blood cell.

CRISPR/Cas9-mediated genome editing: from basic research to gene therapy

CRISPR/Cas9 mediated genome editing is one of the most significant molecular tools discovered to edit the desired genes. It has ushered in a new era of novel possibilities of gene therapy. CRISPR/Cas9 system was originally observed as a part of the adaptive immune system in bacteria. It later on was adapted to carry precise and targeted alterations to the DNA in human cells to be used for gene therapy to correct genetic disorders and treat various severe diseases associated with the genetic changes. Besides this, the CRISPR/Cas9 system has been employed in pharmacogenomics to develop new drugs based on the patient’s genes, in modifying the organisms for research and even for diagnostic purposes in developing CRISPR based COVID-9 test. The recent approval of a CRISPR/Cas9 cellular gene therapy by FDA named “Casgevy” to treat sickle cell anemia is a testimonial to the potentials of CRISPR/Cas9 system in developing innovative gene therapies. This review details the mechanisms of CRISPR/Cas9 gene editing and its utilization in the ongoing clinical trials in the treatment of not only the monogenic disorders like sickle cell disease, thalassemia, and genetic blindness but also in treating multi-factorial diseases like cancers, cardiac diseases, diabetes, autoimmune diseases, viral infections such as human immunodeficiency virus (HIV) etc. An attempt has also been made to discuss the various limitations, challenges and ethical frameworks encompassing CRISPR/Cas9 based gene therapy in clinical settings.

An unusual case of lateral vaginal wall leiomyoma: case report

Twenty to thirty percent of women in the reproductive age group are affected with leiomyomas, the most frequent benign tumor of the uterus. Only 300 occurrences of vaginal leiomyomas have been documented, hence they are still a rare condition. Because of their low incidence and wide range of nonspecific clinical symptoms, tumors are assumed to originate from Mullerian smooth muscle cells in the sub-epithelium of the vagina. However, these cells can easily be misdiagnosed. Usually located in the anterior vaginal wall are vaginal leiomyomas. Here, we describe a case of left upper lateral vaginal wall leiomyoma in a 40-year-old multigravida. She presented with pelvic fullness. Cervical fibroid was diagnosed based on physical examination and MRI. Under anesthesia, the tumor was removed vaginally, and histology revealed a vaginal leiomyoma. Vaginal leiomyomas are uncommon tumors; however, they can present with a range of clinical symptoms and be mistakenly classified as cervical fibroid before surgery. The most effective therapy approach seems to be vaginal tumor excision followed by a histological investigation. To raise awareness of the disease and lower the possibility of a misdiagnosis and improper treatment, the current instance was disclosed.

Efecto modulador de los glucocorticoides sobre la angiogénesis mediada porPI3K/Akt activada por α7-nAChR: Una revisión narrativa

Introducción: los glucocorticoides (GC) han sido ampliamente utilizados en el tratamiento de patologías oculares debido a sus efectos antiinflamatorios y anti-angiogénicos. Se ha sugerido que el mecanismo de acción anti-angiogénico de los GC puede estar relacionado con la enzima fosfatidilinositol-3-cinasa (PI3K), la cual desempeña un papel crucial en la angiogénesis mediada por el receptor de acetilcolina nicotínico alfa 7 (α7-nAChR). La PI3K es una enzima lipoproteica heterodimérica compuesta por las subunidades; reguladora (p85) y catalítica (p110). Objetivo: esta revisión examina la evidencia de cómo los GC modulan la vía de señalización de PI3K activada por α7-nAChR en el proceso de angiogénesis in vitro. Metodología: se realizó una revisión bibliográfica utilizando los motores de búsqueda PubMed y Web of Science, relacionando los conceptos "endothelial cell", "α7-nAChR", "PI3K" y "glucocorticoid". Resultados: se seleccionaron 30 artículos que informaron sobre la expresión de α7-nAChR y PI3K en células endoteliales humanas. Además, del efecto de dexametasona sobre las subunidades de PI3K y Akt (proteína cinasa B) en modelos humano, murino y porcino. A partir de estos hallazgos, se propuso un mecanismo mediante el cual los GC ejercen su efecto anti-angiogénico a través de la modulación en la expresión de la subunidad inhibitoria p85 de PI3K activada por α7-nAChR en células endoteliales humanas. Conclusión: los antecedentes evidencian que dexametasona, ejerce su mecanismo de acción anti-angiogénico mediante el incremento de la expresión de la subunidad inhibitoria p85 de PI3K activada por α7-nAChR.

Introduction: glucocorticoids (GC) have been widely used in the treatment of ocular pathologies due to their anti-inflammatory and anti-angiogenic effects. It has been suggested that the anti-angiogenic mechanism of GC may be related to the enzyme phosphatidylinositol-3-kinase (PI3K), which plays a crucial role in angiogenesis mediated by the alpha 7 nicotinic acetylcholine receptor (α7-nAChR). PI3K is a heterodimeric lipoprotein enzyme composed of regulatory (p85) and catalytic (p110) subunits. Objective: this review examines the evidence of how the GC modulate the PI3K signaling pathway activated by α7-nAChR in the process of in vitro angiogenesis. Methodology: a literature search was conducted using the PubMed and Web of Science search engines, relating the concepts of "endothelial cell," "α7-nAChR," "PI3K," and "glucocorticoid." Results: thirty-two articles were selected that reported on the expression of α7-nAChR and PI3K in human endothelial cells. Furthermore, the effect of dexamethasone on PI3K and Akt (protein kinase B) subunits was documented in human, murine, and porcine models. Based on these findings, a mechanism was proposed whereby GC exert their anti-angiogenic effect through modulation of the expression of the inhibitory p85 subunit of PI3K activated by α7-nAChR in human endothelial cells. Conclusion: background evidence suggests that dexamethasone exerts its anti-angiogenic mechanism of action by increasing the expression of the α7-nAChR-activated PI3K inhibitory subunit p85

Efecto de los microplásticos de poliestireno sobre el citoesqueleto de células humanas / Effect of Polystyrene Microplastics on the Cytoskeleton of Human Cells

Resumen El plástico se ha vuelto muy popular en los últimos años gracias a su durabilidad y propiedades. A pesar de sus múltiples ventajas, la humanidad ha desarrollado cierta dependencia hacia este material, lo que ha propiciado un incremento en su uso y, a su vez, en la generación de desechos ante el escaso hábito de reúso. Uno de los polímeros plásticos más usados es el poliestireno (PS), ya que este se usa en una amplia gama de aplicaciones gracias a su bajo costo y fácil producción. Sin embargo, pasado el tiempo de vida útil de este plástico, es considerado como desecho. El PS al estar expuesto a condiciones atmosféricas como la radiación UV, se fragmenta dando como resultado la creación de microplásticos (MP), mismos que son pequeñas partículas que no sobrepasan los 5 mm, lo que representa una amenaza al medio ambiente pues, al degradarse, las propiedades decaen, se genera un cambio dimensional y, además, pueden ser fácilmente transportadas no solo al medio ambiente, sino también a los organismos. Este artículo de revisión se enfoca en evidenciar las principales rutas que siguen los MP al interaccionar con los seres humanos y los efectos potenciales de los PS-MP en el citoesqueleto, así como en resaltar la necesidad de más estudios al respecto.

Abstract Plastic has become very popular in recent years due to its durability and properties. Despite its many advantages, humanity has developed a certain dependence on this material, which represents an increase in its use and in turn, in waste. One of the most widely used plastic polymers is the polystyrene (PS), as is used in a wide range of applications due to its low cost and easy production, although after the useful life of the plastic, it is considered as waste. When plastic is exposure to atmospheric conditions such as UV radiation, it degrades and fragments giving rise to microplastics (MPs), which are defined as small particles that do not exceed 5 mm, representing a threat to the environment because when they degrade the properties decay, a dimensional change is generated and they can also be easily transported not only to the environment but also to organisms. This review article focuses on highlighting the main pathways that MPs follow when interacting with humans and the potential effects of PS-MPs on the cytoskeleton, as well as highlighting the need for more studies in this regard.

Organoides en Odontología. Avances en este Nuevo Enfoque de Investigación: Revisión Sistemática Exploratoria

Los Organoides (O) son un tipo de cultivo celular 3D, que reproducen las características morfológicas y funcionales de diversos órganos o tejidos en un entorno in vivo. Se logran a través de la proliferación y diferenciación de Células Madres (CM) en distintas líneas celulares con capacidad de autoorganizarse. Son capaces de reproducir forma, función, expresión génica o repuesta a estímulos de la misma forma que el órgano original. Esto le ha permitido servir de base para múltiples investigaciones en el ámbito médico y odontológico. En los últimos años, se ha podido recrear con éxito, prácticamente, todos los órganos de nuestro cuerpo, como pulmones, hígado, tracto reproductivo, cerebro y muchos otros (Bartfeld, 2021). De la misma forma, son varias las líneas de investigación odontológicas desarrolladas. En específico, la creación de O de órganos orales como dientes y glándulas salivales, son las más reportadas (Oshima et al., 2017). Sin embargo, no son del común conocimiento del odontólogo general. Esta revisión sistemática exploratoria, tiene como objetivo presentar una visión general de la evidencia acumulada, determinado las áreas odontológicas de investigación, así como sus resultados. La investigación odontológica, en base al uso de O, es de alta calidad y de vanguardia, mostrando resultados prometedores, que auguran un gran futuro, tanto para la odontología como para los pacientes.

Organoids (O) are a type of 3D cell culture, which reproduce the morphological and functional characteristics of various organs or tissues in an in vivo environment. They are achieved through the proliferation and differentiation of Stem Cells (SC) into different cell lines with the ability to self-organize. They are capable of reproducing form, function, gene expression, or responses to stimuli in the same way as the original organ. This has allowed it to serve as the basis for multiple investigations in the medical and dental field. In recent years, it has been possible to successfully recreate practically all human organs, such as the lungs, liver, reproductive tract, brain and many others (Bartfeld, 2021). In the same way, there are several lines of dental research developed, specifically, the creation of O from oral organs such as teeth and salivary glands, are the most reported (Oshima et al., 2017). However, they are not common knowledge of the general dentist. This exploratory systematic review aims to present an overview of the accumulated evidence, determining the dental research areas, as well as their results. Dental research, based on the use of O, is of high quality and cutting-edge, showing promising results and a favorable future, both for dentistry and for patients.

Phenotypic characteristics and differentiation potential of gingival mesenchymal stem cells in hyperglycemia ­ an ex vivo exploratory study / Características fenotípicas y potencial de diferenciación de las células madre mesenquimales gingivales en la hiperglucemia: un estudio exploratorio ex vivo

Background: The therapeutic use of gingival mesenchymal stem cells (GMSCs) as autologous cells may pose the challenge of alterations inflicted by the hyperglycemic environment. Objective: This study aims to assess the effects of hyperglycemia on the characteristics of GMSCs in diabetics. Materials and Methods: 10 patients who consented and fulfilled the criteria for inclusion and exclusion were recruited and categorized as test (HbA1c > 6.5) and control (HbA1c < 6.0). Gingival explants were obtained from gingival collar of teeth, washed, digested and cultured. The cells were subjected to microscopic observation to assess phenotype characteristics, and flow cytometry and qRT-PCR to assess differentiation potential. Stem cell markers CD90, CD73, CD105, CD34, CD45, HLA DR & HLA ABC, osteogenic differentiation markers RUNX2 & OCN, adipogenic differentiation markers PPARG2 & FABP4 and chondrogenic differentiation markers SOX9 & AGCN were evaluated. Results: Microscopic appearance of spindle shaped cells was found to be comparable in both groups. Flow cytometry results demonstrated comparable expressions with both groups, samples being positive for CD90, CD73, CD105, HLA ABC and negative for CD34, CD45 & HLA DR. There were variations in the expression of markers when assessed for differentiation potentials. Conclusions: The hyperglycemic environment did not manifest any changes in the phenotypic characteristics of GMSCs among diabetics. However, the expression of certain differentiation markers was significantly altered in the diabetic test population included. Further research is being conducted to understand the GMSCs in a hyperglycemic environment with an aim to develop strategies to optimize its clinical implications. Keywords: Gingiva; Mesenchymal stem cells; Diabetes mellitus; Cell Differentiation; Hyperglycemia; Flow cytometry.

Antededentes: El uso terapéutico de células madre mesenquimales gingivales(GMSC) como células autólogas puede plantear el desafío de las alteraciones infligidas por el entorno hiperglucémico. Objetivo: Este estudio tiene como objetivo evaluar los efectos de la hiperglucemia sobre las características de las GMSC en diabéticos. Materiales y Métodos: Se reclutaron y categorizaron 10 pacientes que dieron su consentimiento y cumplieron los criterios de inclusión y exclusión como prueba (HbA1c > 6,5) y control (HbA1c < 6,0). Los explantes gingivales se obtuvieron del cuello gingival de los dientes, se lavaron, digirieron y cultivaron. Las células se sometieron a observación microscópica para evaluar las características fenotípicas y a citometría de flujo y qRT-PCR para evaluar el potencial de diferenciación. Se evaluaron los marcadores de células madre CD90, CD73, CD105, CD34, CD45, HLA DR y HLA ABC, marcadores de diferenciación osteogénica RUNX2 y OCN, marcadores de diferenciación adipogénica PPARG2 y FABP4 y marcadores de diferenciación condrogénica SOX9 y AGCN. Resultados: Se encontró que la apariencia microscópica de las células fusiformes era comparable en ambos grupos. Los resultados de la citometría de flujo demostraron expresiones comparables en ambos grupos, siendo las muestras positivas para CD90, CD73, CD105, HLA ABC y negativas para CD34, CD45 y HLA DR. Hubo variaciones en la expresión de los marcadores cuando se evaluaron los potenciales de diferenciación. Conclusiones: El entorno hiperglucémico no manifestó ningún cambio en las características fenotípicas de las GMSC entre los diabéticos. Sin embargo, la expresión de ciertos marcadores de diferenciación se alteró significativamente en la población de prueba de diabetes incluida. Se están realizando más investigaciones para comprender las GMSC en un entorno hiperglucémico con el objetivo de desarrollar estrategias para optimizar sus implicaciones clínicas.

A case of ovarian juvenile granulosa cells tumor with peritoneal and jejunal localisation at Amath Dansokho Regional Hospital, Kedougou, Senegal

Granulosa tumors are rare ovarian tumors they belong to sex-cord and stromal tumor family. They are the most common type of malignant stromal tumor and have a good prognosis. There are two types: the adult type (AGCTs), which occurs most frequently between the ages of 40 and 70, and the juvenile type (JGCTs), which is uncommon. Juvenile granulosa tumors tend to involve a single ovary and occur mainly in people who are younger than 30 years. Metastatic spread is rare and, if present, is usually limited to the peritoneal cavity. We report a case of ovarian juvenile granulosa cell tumor extending to the jejunum and peritoneum in an 18-year-old female patient received in our institution.

Células tronco e endodontia regenerativa / Stem cells and regenerative endodontics

Desde o incremento das pesquisas das células-tronco em 1961, por cientistas canadenses, os avanços em estudos, pesquisas e o desenvolvimento de novos tratamentos com esse tipo de recurso se mostram promissores. O uso de células-tronco é uma grande aposta tanto para a medicina quanto para a odontologia regenerativa. Os tratamentos com essa terapia podem oferecer mais qualidade de vida para as pessoas. O potencial dessas células tão especiais se encontra em duas características peculiares: elas são capazes de se multiplicarem e de se diferenciarem em outros tipos de células, como de tecidos, cartilagens e neurônios. É dessa maneira que elas têm um papel fundamental para estudos e tratamentos relacionados à regeneração. O uso de células-tronco na Odontologia torna possível diferentes processos odontológicos que oferecem mais qualidade de vida ao paciente. Isso porque fatores como defeitos genéticos, hábitos nocivos, cáries dentárias e perdas precoces dos dentes contribuem com a perda de dentes ao longo da vida. No início do século XXI, por volta dos anos de 2005, 2006, pesquisadores começaram a publicar em revistas internacionais da área uma nova técnica baseada no uso de célulastronco existentes no osso de sustentação dos dentes e na articulação dento alveolar. Esta técnica, chamada de Revascularização, promove o aparecimento de um novo tecido pulpar sadio, devolvendo ao dente sua vitalidade e higidez(AU)

Since the increase in stem cell research in 1961 by Canadian scientists, advances in studies, research and the development of new treatments with this type of resource have shown promise. The use of stem cells is a big bet for both medicine and regenerative dentistry. Treatments with this therapy can offer more quality of life for people. The potential of these very special cells lies in two peculiar characteristics: they are able to multiply and differentiate into other types of cells, such as tissues, cartilage and neurons. It is in this way that they play a key role for studies and treatments related to regeneration. The use of stem cells in dentistry makes possible different dental processes that offer more quality of life to the patient. That's because factors such as genetic defects, harmful habits, tooth decay, and early tooth loss all contribute to lifelong tooth loss. At the beginning of the twenty-first century, around the years 2005, 2006, researchers began to publish in international journals of the area a new technique based on the use of existing stem cells in the supporting bone of the teeth and in the alveolar tooth joint. This technique, called Revascularization, promotes the appearance of a new healthy pulp tissue, returning to the tooth its vitality and hygiene(AU)

Neural and Neural Crest-Derived Stem Cell Distribution in the Adult Human Dental Pulp / Distribución de Células Madre Neurales y Derivadas de la Cresta Neural en la Pulpa Dental Humana Adulta

SUMMARY: Despite comprehensive studies and reports about the properties of dental pulp stem cells (DPSCs) in vitro, we still need to confirm whether these in vitro characteristics coincide with the nature of DPSCs in situ. The anatomical location of DPSCs populations in the dental pulp has yet to be investigated. Moreover, the mesenchymal DPSCs have been much more studied than the neural crest-derived DPSCs. In this study, well-recognized neural/neural crest stem cell markers NCAM1, Nestin, SNAIL/SLUG, SOX9, and S100 are being investigated by immunohistochemistry to localize the precise location of these populations of DPSCs within the human adult dental pulp.All previously mentioned markers were expressed in the dental pulp, and their intensity and location of expression were reported.

A pesar de estudios e informes exhaustivos sobre las propiedades de las células madre de la pulpa dental (DPSC) in vitro, todavía necesitamos confirmar si estas características in vitro coinciden con la naturaleza de las DPSC in situ. La ubicación anatómica de las poblaciones de DPSC en la pulpa dental aún no se ha investigado. Además, las DPSC mesenquimales han sido mucho más estudiadas que las DPSC derivadas de la cresta neural. En este estudio, se están investigando mediante inmunohisto química marcadores de células madre de la cresta neural/ neural NCAM1, Nestin, SNAIL/SLUG, SOX9 y S100 para localizar la ubicación precisa de estas poblaciones de DPSC dentro de la pulpa dental humana adulta. Todos los marcadores mencionados anteriormente se expresaron en la pulpa dental y se informó su intensidad y ubicación de expresión.

Emerging Role of Mast Cells as Biological Markers in the Pathogenesis of Infectious Diseases and their Projection in Health Emergencies / Rol Emergente de los Mastocitos como Marcadores Biológicos en la Patogenia de Enfermedades Infecciosas y su Proyección en Emergencias Sanitarias

SUMMARY: Mast cells (MC) are cells of the immune system that regulate cell and tissue homeostasis, are found in low numbers, have an intact plasma membrane, and a cytoplasm with a wide variety of inflammatory chemical mediators. The activation or degranulation of mast cells implies the release of these chemical mediators (interleukins, cytokines, and more), causing tissue actions ranging from the activation of metalloproteinases to the development of anaphylactic hypersensitivity of different degrees, alterations in vascular permeability, and loss of cell homeostasis. This behavior would allow them to act as sentinels responding to pathophysiological processes. During the COVID-19 pandemic, in positive human patients, the available literature reports the presence and degranulation of mast cells in a generalized manner, especially in the respiratory tract. This study aimed to analyze the emerging role of MCs in the pathogenesis of diseases and their projection as biological markers in the treatment of diseases or pandemics. The analysis of human biopsies showed that MCs are observed as cells with diameters between 8 to 20 µm, and in inflamed tissues, degranulation of MCs is observed. The action of MCs degranulation was related to different inflammatory processes of autoimmune diseases. It is concluded that the potential of MC as therapeutic targets and biomarkers could raise new pharmacological targets, as supportive therapy, and possibly of great help in the treatment of future emerging pandemics such as the current monkeypox.

Los mastocitos (MC) son células del sistema inmune que regulan la homeostasis celular y tisular, se encuentran en escasas cantidades, presentan una membrana plasmática íntegra, y un citoplasma con una amplia variedad de mediadores químicos. La activación o degranulación de los mastocitos implica la liberación de estos mediadores químicos (interleuquinas, citoquina y más), provocando acciones tisulares que van desde la activación de metaloproteinasas hasta el desarrollo de hipersensibilidad anafiláctica de distinto grado, provocando la pérdida de la homeostasis celular. Durante la pandemia de la COVID-19, en pacientes humanos positivos, se informa recurrentemente la presencia y degranulación de mastocitos de manera generalizada sobre todo en las vías respiratorias. El análisis de la degranulación de los MCs podría proporcionar información que podría utilizarse en el desarrollo de tratamientos preventivos contra infecciones virales, bacterianas u otros patógenos. Este comportamiento les permitiría actuar como centinelas en respuesta a procesos fisiopatológicos. El objetivo de este trabajo fue analizar el rol emergente de los MCs en la patogenia de enfermedades y su proyección como marcadores biológicos en el tratamiento de enfermedades o pandemias. En análisis de biopsias humanas se muestran que MCs se observan como células con diámetros de entre 8 a 20 µm, en tejidos inflamados se observa degranulación de MCs. Se relacionó el accionar de degranulación de los MCs en diferentes procesos inflamatorios de enfermedades autoinmunes. Se concluye que el potencial de MC como dianas terapéuticas y biomarcadores podrían plantear nuevos objetivos farmacológicos, como terapia de apoyo, y posiblemente de gran ayuda en el tratamiento de futuras pandemias emergentes como la actual viruela del mono.