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Biochem Genet ; 2024 Mar 05.
Artigo em Inglês | MEDLINE | ID: mdl-38441812


Mesenchymal stem cells (MSCs) are the most widely used stem cells in regenerative medicine. They can be isolated from multiple sources, most commonly bone marrow and adipose tissue. MSCs derived from different sources show similar molecular and biological characteristics, but there is ongoing debate regarding the best source of MSCs and the potential biological differences between MSCs from different origins. Bone marrow derived-MSCs (BM-MSCs) and adipose tissue-derived MSCs (AD-MSCs) share many molecular and immunomodulatory properties. In this study, we compared the levels of major immunomodulatory, adhesive, and migratory factors in human BM-MSCs and AD-MSCs under normal conditions, which will help determine the suitability and specificity of each type for certain therapeutic applications. WST1 assay and fluorescent assay SUC-LLVY-AMC were used to measure MSC proliferation and 26S proteasome activity, respectively. Western blotting, ELISA Assays, and bright field live imaging were also used. AD-MSCs and BM-MSCs exhibited similar morphology and proliferation rate. A significantly higher 26S proteasome activity was detected in AD-MSCs than in BM-MSCs. Levels of ICAM-1, integrin α5 and integrin α6 were significantly higher in AD-MSCs compared to BM-MSCs, while no significant difference in CXCR4 levels was observed. Expression of IDO and factor H was significantly higher in AD-MSCs, while CTLA-4 and IL-10 levels were higher in BM-MSCs. This indicates that AD-MSCs and BM-MSCs have different immunomodulatory and adhesion profiles. MSCs isolated from different sources may show differences in their biological and immunomodulatory properties, suggesting a potential suitability of certain MSCs type for specific conditions. Also, combination of different MSCs types could help optimize therapeutic outcomes.

IUBMB Life ; 2023 Nov 28.
Artigo em Inglês | MEDLINE | ID: mdl-38014654


Mesenchymal stem cells (MSCs) are a therapeutically efficient type of stem cells validated by their ability to treat many inflammatory and chronic conditions. The biological and therapeutic characteristics of MSCs can be modified depending on the type of microenvironment at the site of transplantation. Diabetes mellitus (DM) is a commonly diagnosed metabolic disease characterized by hyperglycemia, which alters over time the cellular and molecular functions of many cells and causes their damage. Hyperglycemia can also impact the success rate of MSCs transplantation; therefore, it is extremely significant to investigate the effect of high glucose on the biological and therapeutic attributes of MSCs, particularly their immunomodulatory abilities. Thus, in this study, we explored the effect of high glucose on the immunosuppressive characteristics of human adipose tissue-derived mesenchymal stem cells (hAD-MSCs). We found that hAD-MSCs cultured in high glucose lost their immunomodulatory abilities and became detectable by immune cells. The decline in the immunosuppressive capabilities of hAD-MSCs was mediated by significant decrease in the levels of IDO, IL-10, and complement factor H and substantial increase in the activity of immunoproteasome. The protein levels of AMP-activated protein kinase (AMPK) and phosphofructokinase-1 (PFK-1), which are integral regulators of glycolysis, revealed a marked decline in high glucose exposed MSCs. The findings of our study indicated the possibility of immunomodulatory shift in MSCs after being cultured in high glucose, which can be translationally employed to explain their poor survival and short-lived therapeutic outcomes in diabetic patients.

Curr Stem Cell Res Ther ; 18(5): 580-594, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36045542


Alzheimer's disease (AD) is considered one of the most complicated neurodegenerative disorders, and it is associated with progressive memory loss and remarkable neurocognitive dysfunction that negatively impacts the ability to perform daily living activities. AD accounts for an estimated 60-80% of dementia cases. AD's previously known pathological basis is the deposition of amyloid ß (Aß) aggregates and the formation of neurofibrillary tangles by tau hyperphosphorylation in the cell bodies of neurons that are located in the hippocampus, neocortex, and certain other regions of the cerebral hemispheres and limbic system. The lack of neurotransmitter acetylcholine and the activation of oxidative stress cascade may also contribute to the pathogenesis of AD. These pathological events can lead to irreversible loss of neuronal networks and the emergence of memory impairment and cognitive dysfunction that can engender an abnormal change in the personality. AD cannot be cured, and to some extent, the prescribed medications can only manage the symptoms associated with this disease. Several studies have reported that the regenerative abilities of neural stem/progenitor cells (NSCs) remarkably decline in AD, which disturbs the balancing power to control its progression. Exogenous infusion or endogenous activation of NSCs may be the ultimate solution to restore the neuronal networks in the brain of AD patients and regenerate the damaged areas responsible for memory and cognition. In this mini-review, we will touch upon the fate of NSCs in AD and the utilization of neurogenesis using modified NSCs to restore cognitive functions in AD.

Doença de Alzheimer , Células-Tronco Neurais , Humanos , Doença de Alzheimer/terapia , Doença de Alzheimer/patologia , Peptídeos beta-Amiloides/uso terapêutico , Neurônios/patologia , Neurogênese
Int. j. morphol ; 39(6): 1776-1781, dic. 2021. ilus, tab, graf
Artigo em Inglês | LILACS | ID: biblio-1385549


SUMMARY: The Q-angle is defined as the acute angle formed by the vectors for combined pull of the quadriceps femoris muscle and the patellar tendon. This study aimed to investigate the variations in Q angle with respect to race. Moreover, this study performed ultrasound to evaluate of the thickness of articular cartilage covering the medial and lateral femoral condyle in volunteers with an increased Q angle. The study included 487 Jordanian and 402 Malaysians with age range 18-23 years. Moreover, the study included 30 participants aged between 18 and 22 years, with a total of 15 volunteers with Q >14° and 15 patients with Q ≤14°. Both Q angle and condylar distance were measured by well-trained medical practitioners according to a well-established protocol. The thickness of articular cartilage covering the medial and lateral femoral condyle of the femoral bone was measured using ultrasound. Regardless of race, Q angle was greater in females. Furthermore, Q angle was significantly greater in Arab volunteers compared to Malay volunteers. Q angle significantly increase with increasing condylar distance in both races. Finally, the statistical analysis showed a significantly reduced thickness of articular cartilage on both medial and lateral femoral condyle (P = 0.05) in the Q >14° group. Multiple factors including race and condylar distance and even the articular cartilage of femoral condyle should be considered during the examination and management of knee fractures and condylar diseases.

RESUMEN: El ángulo Q se define como el ángulo agudo formado por los vectores de tracción combinada del músculo cuádriceps femoral y el tendón patelar. Este estudio tuvo como objetivo investigar las variaciones en el ángulo Q con respecto a la raza. Además, se realizó una ecografía para evaluar el grosor del cartílago articular que cubre los cóndilos femorales medial y lateral en voluntarios con un ángulo Q aumentado. El estudio incluyó a 487 jordanos y 402 malayos con un rango de edad de 18 a 23 años. Además, el estudio incluyó a 30 participantes con edades comprendidas entre 18 y 22 años, 15 voluntarios con Q> 14 ° y 15 pacientes con Q ≤ 14 °. Tanto el ángulo Q como la distancia condilar fueron medidos por médicos bien entrenados de acuerdo con un protocolo establecido. El grosor del cartílago articular que cubre los cóndilos femorales medial y lateral del fémur se midió mediante ecografía. Independientemente del grupo racial, el ángulo Q fue mayor en las mujeres. Además, el ángulo Q fue significativamente mayor en los voluntarios árabes en comparación con los voluntarios malayos. El ángulo Q se aumenta significativamente al incrementarse la distancia condilar en ambas grupos raciales. Finalmente, el análisis estadístico mostró una reducción significativa del grosor del cartílago articular en los cóndilos femorales medial y lateral (P = 0,05) en el grupo Q> 14. Durante la exploración y el tratamiento de las fracturas de rodilla y de las enfermedades condilares, se deben considerar múltiples factores, incluida la raza y la distancia condilar e incluso el cartílago articular del cóndilo femoral.

Humanos , Masculino , Feminino , Adolescente , Adulto Jovem , Cartilagem Articular/diagnóstico por imagem , Fatores Raciais , Joelho/diagnóstico por imagem , Cartilagem Articular/anatomia & histologia , Estudos Retrospectivos , Ultrassonografia , Jordânia , Joelho/anatomia & histologia , Malásia
Int J Pharm Pract ; 21(5): 337-40, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23418903


OBJECTIVE: Clinical pharmacy services are still in the early stages of implementation in the Middle East. This study assessed the implementation of clinical pharmacy services at a major university hospital. METHODS: All recommendations and services provided by clinical pharmacists were recorded for a period of 7 months. KEY FINDINGS: During the study period a total of 3026 patients were followed up and 10,783 recommendations and services were provided. The physicians' rate of acceptance of clinical pharmacists' recommendations was 69.4%. CONCLUSION: The implementation of clinical pharmacy services in this setting was successful and should positively impact patient care.

Hospitais Universitários , Serviço de Farmácia Hospitalar , Humanos , Jordânia , Farmacêuticos
Endocr Res ; 37(1): 7-11, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-21977974


OBJECTIVES: This study aims to evaluate the efficacy and safety of adding pioglitazone to treatment with metformin (MF) and gliclazide in patients with type 2 diabetes mellitus (DM2) who had inadequate glycemic control. METHODS: This study is a retrospective cohort study based on King Abdullah University Hospital records concerning type 2 diabetic adult patients for year 2008. Patients included were assessed according to changes in glycosylated hemoglobin (HbA1c), lipid profile, albuminuria and liver enzymes before and after the addition of pioglitazone. RESULTS: The patients included in the study had an initial mean HbA1c of 9.44%, which decreased to 7.56% after the addition of pioglitazone (P-value < 0.005).

Glicemia/efeitos dos fármacos , Diabetes Mellitus Tipo 2/tratamento farmacológico , Gliclazida/uso terapêutico , Hipoglicemiantes/uso terapêutico , Metformina/uso terapêutico , Tiazolidinedionas/uso terapêutico , Adulto , Idoso , Glicemia/metabolismo , Diabetes Mellitus Tipo 2/sangue , Quimioterapia Combinada , Feminino , Gliclazida/farmacologia , Humanos , Hipoglicemiantes/farmacologia , Masculino , Metformina/farmacologia , Pessoa de Meia-Idade , Pioglitazona , Estudos Retrospectivos , Tiazolidinedionas/farmacologia