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1.
J Cell Mol Med ; 28(2): e18052, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38041559

RESUMO

Fibrosis refers to excessive build-up of scar tissue and extracellular matrix components in different organs. In recent years, it has been revealed that different cytokines and chemokines, especially Transforming growth factor beta (TGF-ß) is involved in the pathogenesis of fibrosis. It has been shown that TGF-ß is upregulated in fibrotic tissues, and contributes to fibrosis by mediating pathways that are related to matrix preservation and fibroblasts differentiation. There is no doubt that antioxidants protect against different inflammatory conditions by reversing the effects of nitrogen, oxygen and sulfur-based reactive elements. Oxidative stress has a direct impact on chronic inflammation, and as results, prolonged inflammation ultimately results in fibrosis. Different types of antioxidants, in the forms of vitamins, natural compounds or synthetic ones, have been proven to be beneficial in the protection against fibrotic conditions both in vitro and in vivo. In this study, we reviewed the role of different compounds with antioxidant activity in induction or inhibition of TGF-ß/SMAD signalling pathway, with regard to different fibrotic conditions such as gastro-intestinal fibrosis, cardiac fibrosis, pulmonary fibrosis, skin fibrosis, renal fibrosis and also some rare cases of fibrosis, both in animal models and cell lines.


Assuntos
Fibrose Pulmonar , Fator de Crescimento Transformador beta , Animais , Fator de Crescimento Transformador beta/metabolismo , Antioxidantes/farmacologia , Fibrose , Inflamação , Fator de Crescimento Transformador beta1/metabolismo , Proteínas Smad/metabolismo
2.
Mol Biol Rep ; 51(1): 261, 2024 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-38302805

RESUMO

BACKGROUND: The cardioprotective properties of mesenchymal stem cells and the therapeutic potential of curcumin (CUR) have been explored. Combining these approaches may enhance stem cell effectiveness and expedite healing. This study aimed to investigate the synergistic effects of co-treating bone marrow mesenchymal stem cells (BMSCs) with curcumin on vascular endothelial growth factor (VEGF) levels, in a rat model of myocardial ischemia (MI). METHODS AND RESULTS: Sixty-five male rats were divided into four groups: G1 (healthy control), G2 (MI induced by isoproterenol hydrochloride), G3 (treated with BMSCs), and G4 (co-treated with curcumin and BMSCs). Blood and tissue samples were collected at specific time points (day 1, 7, 15 and 21) after MI induction. Serum levels of lactate dehydrogenase (LDH), creatine kinase (CK), cardiac troponin I (cTnI), aspartate aminotransferase (AST), CK-MB and VEGF were measured. VEGF mRNA and protein expression were evaluated using RT-qPCR and Western blot techniques. Histopathological assessments were performed using H&E staining and CD31 immunofluorescence staining. VEGF expression significantly increased on days 7 and 15 in the CUR-BMSCs group, peaking on day 7. Western blot analysis confirmed elevated VEGF protein expression on days 7 and 15 post-MI. ELISA results demonstrated increased serum VEGF levels on days 7 and 15, reaching the highest level on day 7 in CUR-BMSCs-treated animals. Treated groups showed lower levels of LDH, AST, CK, CK-MB and cTnI compared to the untreated MI group. H&E staining revealed improved myocardial structure, increased formation of new capillaries, in both treatment groups compared to the MI group. CONCLUSION: Combining curcumin with BMSCs promotes angiogenesis in the infarcted myocardium after 15 days of MI induction. These findings suggest the potential of this combined therapy approach for enhancing cardiac healing and recovery.


Assuntos
Doença da Artéria Coronariana , Curcumina , Transplante de Células-Tronco Mesenquimais , Células-Tronco Mesenquimais , Infarto do Miocárdio , Isquemia Miocárdica , Ratos , Masculino , Animais , Fator A de Crescimento do Endotélio Vascular/genética , Fator A de Crescimento do Endotélio Vascular/metabolismo , Infarto do Miocárdio/tratamento farmacológico , Infarto do Miocárdio/patologia , Curcumina/farmacologia , Curcumina/metabolismo , Medula Óssea/metabolismo , Angiogênese , Isquemia Miocárdica/metabolismo , Miocárdio/metabolismo , Doença da Artéria Coronariana/metabolismo , Células-Tronco Mesenquimais/metabolismo , Transplante de Células-Tronco Mesenquimais/métodos , Células da Medula Óssea
3.
Mol Biol Rep ; 51(1): 308, 2024 Feb 17.
Artigo em Inglês | MEDLINE | ID: mdl-38366290

RESUMO

The DNA damage response (DDR) is a crucial cellular signaling pathway activated in response to DNA damage, including damage caused by chemotherapy. Chemoresistance, which refers to the resistance of cancer cells to the effects of chemotherapy, poses a significant challenge in cancer treatment. Understanding the relationship between DDR and chemoresistance is vital for devising strategies to overcome this resistance and improve treatment outcomes. Long non-coding RNAs (lncRNAs) are a class of RNA molecules that do not code for proteins but play important roles in various biological processes, including cancer development and chemoresistance. RNA-binding proteins (RBPs) are a group of proteins that bind to RNA molecules and regulate their functions. The interaction between lncRNAs and RBPs has been found to regulate gene expression at the post-transcriptional level, thereby influencing various cellular processes, including DDR signaling pathways. Multiple studies have demonstrated that lncRNAs can interact with RBPs to modulate the expression of genes involved in cancer chemoresistance by impacting DDR signaling pathways. Conversely, RBPs can regulate the expression and function of lncRNAs involved in DDR. Exploring these interactions can provide valuable insights for the development of innovative therapeutic approaches to overcome chemoresistance in cancer patients. This review article aims to summarize recent research on the interaction between lncRNAs and RBPs during cancer chemotherapy, with a specific focus on DDR pathways.


Assuntos
Neoplasias , RNA Longo não Codificante , Humanos , RNA Longo não Codificante/metabolismo , Resistencia a Medicamentos Antineoplásicos/genética , Neoplasias/tratamento farmacológico , Neoplasias/genética , Dano ao DNA/genética , Reparo do DNA/genética , Proteínas de Ligação a RNA/genética , Proteínas de Ligação a RNA/metabolismo
4.
Mol Biol Rep ; 51(1): 739, 2024 Jun 14.
Artigo em Inglês | MEDLINE | ID: mdl-38874886

RESUMO

Acrylamide (ACR) is an industrial chemical used to produce polyacrylamide, a synthetic polymer with a wide range of applications. Depending on the dosage, its presence in occupational and environmental sources poses potential health risks to humans and animals. ACR can be formed in starchy foods cooked at high temperatures. Its effects on human sperm are not well understood. Animal studies indicate that ACR induces toxicity in the male reproductive system through oxidative stress mechanisms. Exposure to ACR alters the normal structure of testicular tubules, leading to congestion, interstitial edema, degeneration of spermatogenic cells, formation of abnormal spermatid giant cells, and necrosis and apoptosis. It also disrupts the balance of important biomarkers such as malondialdehyde, nitric oxide, superoxide dismutase, catalase, and glutathione. ACR has a negative impact on mitochondrial function, antioxidant enzymes, ATP production, and sperm membrane integrity, resulting in decreased sperm quality. Furthermore, it interferes with the expression of steroidogenic genes associated with testosterone biosynthesis. This review explores the detrimental effects of ACR on sperm and testicular function and discusses the potential role of antioxidants in mitigating the adverse effects of ACR on male reproduction.


Assuntos
Acrilamida , Estresse Oxidativo , Espermatozoides , Testículo , Masculino , Acrilamida/toxicidade , Espermatozoides/efeitos dos fármacos , Espermatozoides/metabolismo , Humanos , Testículo/efeitos dos fármacos , Testículo/metabolismo , Animais , Estresse Oxidativo/efeitos dos fármacos , Antioxidantes/metabolismo , Antioxidantes/farmacologia
5.
BMC Med Educ ; 24(1): 722, 2024 Jul 03.
Artigo em Inglês | MEDLINE | ID: mdl-38961364

RESUMO

INTRODUCTION: In response to the COVID-19 crisis, this study aimed to introduce a new virtual teaching model for anatomy education that combines Peer-Assisted Learning (PAL) and flipped classrooms, aligning with constructivist principles. METHOD: The Flipped Peer Assisted (FPA) method was implemented in a virtual neuroanatomy course for second-year medical students at Birjand University of Medical Sciences via a descriptive study. The method involved small groups of PAL, with peer learning serving as educational assistants and the teacher acting as a facilitator. Educational content was uploaded to the university's learning management system (LMS). The opinion of medical students regarding the teaching method were evaluated using a 15-item questionnaire on a five-point Likert scale. RESULTS: A total of 210 students participated in the instruction using the FPA method. The analysis of students' scores revealed an average score of 26.75 ± 3.67 on the 30-point test. According to student feedback, this teaching method effectively motivated students to study, enhanced teamwork and communication skills, transformed their perspective on the anatomy course, provided opportunities for formative assessment and feedback, and demonstrated the teacher's dedication to education. CONCLUSION: The FPA model demonstrates its effectiveness in transforming traditional classroom teaching and fostering teaching and learning in virtual environments, particularly during pandemics like COVID-19. This model holds promise for enhancing anatomy education in challenging circumstances.


Assuntos
Anatomia , COVID-19 , Educação de Graduação em Medicina , Grupo Associado , Estudantes de Medicina , Humanos , Educação de Graduação em Medicina/métodos , Anatomia/educação , SARS-CoV-2 , Educação a Distância , Masculino , Pandemias , Currículo , Avaliação Educacional , Modelos Educacionais , Feminino , Ensino
6.
Mol Cell Probes ; 72: 101935, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37806642

RESUMO

Natural killer cells (NK cells) are a type of cytotoxic lymphocytes which are involved in innate immunity, alongside with assisting with adaptive immune response. Since they have cytotoxic effects, disruptions in their functionality and development leads to a variety of conditions, whether malignant or non-malignant. The profile and interaction of these non-coding RNAs and NK cells in different conditions is extensively studied, and it is now approved that if dysregulated, non-coding RNAs have detrimental effects on NK cell activity and can contribute to the pathogenesis of diverse disorders. In this review, we aim at a thorough inspection on the role of different non-coding RNAs on the activity and development of NK cells, in a broad spectrum of conditions, including blood-related disorders, viral infections, neurological diseases, gastrointestinal disorders, lung disorders, reproductive system conditions and other types of maladies, alongside with providing insight to the future non-coding RNA-NK cell studies.


Assuntos
Células Matadoras Naturais , RNA não Traduzido , RNA não Traduzido/genética , Imunidade Inata/genética
7.
Mol Biol Rep ; 50(6): 4823-4829, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37039996

RESUMO

OBJECTIVE: Integrins are known as key molecules that importantly involve in fertilization. This study aimed to evaluate effects of vitrification on fertilization rate and expression of integrin genes, α9 and ß1, on mice oocytes in GV and MІІ stages. MATERIALS AND METHODS: From the ovarian tissue and fallopian tube of NMRI mice, germinal vesicle (GV, n = 200) and metaphase II (MII, n = 200) oocytes were obtained. Then, oocytes were distributed into 4 groups including non-vitrified GV, non-vitrified MII, vitrified GV, and vitrified MII. Cryotop method was used for vitrification and oocytes (for 4 weeks) were kept in liquid nitrogen. After that, by using an inverted microscope, the rate of survived oocytes was assessed. Also, in vitro fertilization (IVF) for oocytes, obtained from in vitro maturated MII and mice ovaries (ovulated MII), was done to assess embryos at differenced stages (2-cells, morula, and hatched). Finally, RT-qPCR was performed to investigate the mRNA expression of integrin genes (α9 and ß1). RESULTS: After vitrification, the rate of survived oocytes, 68.65%for GV and 65.07% % for MII, did not show a remarkable difference related to non-vitrified groups, while the fertilization rate in vitrified groups remarkably decrease compared to non-vitrified groups (p < 0.05). Also, the expression of α9 and ß1 genes was significantly altered in vitrified groups when compared to non-vitrified groups (p < 0.05). There was no significant difference in embryo developmental rates for non-vitrified and vitrified groups. CONCLUSION: Cryotop method for vitrification caused an alternation in oocyte quality by reducing fertilization rate and integrin gene expression.


Assuntos
Criopreservação , Vitrificação , Feminino , Camundongos , Animais , Criopreservação/métodos , Sobrevivência Celular , Oócitos , Fertilização in vitro/métodos
8.
Nutr Metab Cardiovasc Dis ; 33(9): 1633-1646, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37419751

RESUMO

AIMS: This systematic review and dose-response meta-analysis was conducted to summarize data from available clinical trials on the effects of whey protein (WP) supplementation on blood pressure (BP) in adults. DATA SYNTHESIS: A comprehensive literature search was conducted in the electronic databases PubMed, Web of Science, ProQuest, Embase, and SCOPUS from inception to October 2022. Weighted mean differences (WMD) and 95% confidence intervals (CI) were calculated to assess pooled effect sizes. Heterogeneity between studies was assessed using the Cochran's Q test and I2. Subgroup analysis was performed to assess potential sources of heterogeneity. The dose-response relationship was assessed using fractional polynomial modeling. Of the 2,840 records, 18 studies with 1,177 subjects were included. Pooled analysis showed that whey protein supplementation resulted in a significant reduction in systolic blood pressure (WMD: -1.54 mmHg; 95% CI: -2.85 to -0.23, p = 0.021), with significant heterogeneity between studies (I2 = 64.2%, p < 0.001), but not for diastolic blood pressure (DBP) (WMD: -0.27 mmHg; 95% CI: -1.14, 0.59, p = 0.534) with high heterogeneity between studies (I2 = 64.8%, p < 0.001). However, WP supplementation significantly reduced DBP at a dose of ˃30 g/day, in RCTs that used WP isolate powder for their intervention, in sample sizes ≤100, in studies with an intervention duration of ≤10 weeks, and in those studies that were conducted in patients with hypertension and had participants with a BMI of 25-30 kg/m2. CONCLUSION: This meta-analysis demonstrated that WP intake significantly reduced SBP levels. Further large-scale studies are needed to specify the exact mechanism, and optimal dosage of WP supplementation to obtain a beneficial effect on BP.


Assuntos
Hipertensão , Adulto , Humanos , Pressão Sanguínea , Proteínas do Soro do Leite/efeitos adversos , Ensaios Clínicos Controlados Aleatórios como Assunto , Hipertensão/diagnóstico , Hipertensão/tratamento farmacológico , Bases de Dados Factuais , Suplementos Nutricionais/efeitos adversos
9.
Cancer Cell Int ; 22(1): 298, 2022 Sep 30.
Artigo em Inglês | MEDLINE | ID: mdl-36180892

RESUMO

Resveratrol (3,5,4'-trihydroxy-trans-stilbene) is a natural phenol that is present in the skin of the grape, blueberry, raspberry, mulberry, and peanut. This substance is synthesized in these plants following injury or exposure to pathogens. Resveratrol is used as a dietary supplement for a long time and its effects have been assessed in animal models of human disorders. It has potential beneficial effects in diverse pathological conditions such as diabetes mellitus, obesity, hypertension, neoplastic conditions, Alzheimer's disease, and cardiovascular disorders. Notably, resveratrol has been found to affect the expression of several genes including cytokine coding genes, caspases, matrix metalloproteinases, adhesion molecules, and growth factors. Moreover, it can modulate the activity of several signaling pathways such as PI3K/AKT, Wnt, NF-κB, and Notch pathways. In the current review, we summarize the results of studies that reported modulatory effects of resveratrol on the expression of genes and the activity of signaling pathways. We explain these results in two distinct sections of non-neoplastic and neoplastic conditions.

10.
Mol Biol Rep ; 49(10): 9767-9781, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-35499687

RESUMO

The PI3K/AKT signaling has crucial role in the regulation of numerous physiological functions through activation of downstream effectors and modulation of cell cycle transition, growth and proliferation. This pathway participates in the pathogenesis of several human disorders such as heart diseases through regulation of size and survival of cardiomyocytes, angiogenic processes as well as inflammatory responses. Moreover, PI3K/AKT pathway participates in the process of myocardial injury induced by a number of substances such as H2O2, Mercury, lipopolysaccharides, adriamycin, doxorubicin and epirubicin. In this review, we describe the contribution of this pathway in the pathoetiology of myocardial ischemia/reperfusion injury and myocardial infarction, heart failure, cardiac hypertrophy, cardiomyopathy and toxins-induced cardiac injury.


Assuntos
Mercúrio , Traumatismo por Reperfusão Miocárdica , Apoptose , Doxorrubicina/metabolismo , Epirubicina , Humanos , Peróxido de Hidrogênio/metabolismo , Lipopolissacarídeos/metabolismo , Traumatismo por Reperfusão Miocárdica/metabolismo , Miócitos Cardíacos/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo
11.
Mol Biol Rep ; 49(7): 6701-6716, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-35220526

RESUMO

Ginsenosides belong to a group of steroid glycosides that are extracted from the plant genus Panax (ginseng). This plant has been used for a long time for the treatment of a variety of disorders in traditional medicine. Recent studies have assessed the biological impact of Ginsenosides in cell culture or animal models. Animal studies have shown their beneficial impacts in the remedy of pathological conditions in different tissues. The ameliorating effects of Ginsenosides in diverse pathogenic conditions can be attributed to their effects on the production of reactive oxygen species. These substances mainly affect the activity of AMPK/AKT and PI3K/AKT pathways. The beneficial effects of Ginsenosides have been appraised in diabetes-related complications, spinal cord injury, cerebral ischemia, myocardial ischemia, and other disorders which are associated with oxidative stress. Moreover, these substances have been shown to interfere with the pathologic conditions during carcinogenesis. In the current study, we explain these impacts in two distinct sections including non-neoplastic conditions and neoplastic conditions.


Assuntos
Ginsenosídeos , Panax , Animais , Ginsenosídeos/metabolismo , Ginsenosídeos/farmacologia , Panax/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Transdução de Sinais
12.
Andrologia ; 54(4): e14375, 2022 May.
Artigo em Inglês | MEDLINE | ID: mdl-35266181

RESUMO

The current research aimed to assess the impacts of Minocycline on varicocele-induced regulation of apoptotic-related genes and oxidative stress in the testis of adult Wistar rats. Thirty-two rats were divided into 4 groups: sham, varicocele (VcI), varicocele treated with Minocycline (VcI + Mno) for 56 days and healthy rats treated with minocycline (Mno). After 8 weeks, the oxidative stress markers levels in serum were investigated, afterwards, the level of Bax and Bcl-2 expression were assessed through 'immunocytochemistry' and RT-qPCR assays. Also, the rate of apoptosis was evaluated through the TUNEL method. Johnson's score, 'the width of epithelium' and 'seminiferous tubules diameter' were ameliorated in the VcI + Mno group in comparison with the Vcl group. Administration of Minocycline raised the 'Glutathione peroxidase' and 'Superoxide dismutase' levels in serum and declined the Malondialdehyde level in serum (p = 0.001). Furthermore, current study represented that minocycline reduced Bax and enhanced the expression of Bcl-2 gene and protein in comparison with the Vcl group (p < 0.05). In addition, Minocycline administration significantly declined the rate of apoptosis in germ cells (p < 0.05). Our study demonstrated that the administration of Minocycline could improve testicular injury in varicocele-induced rats by its antioxidant activity.


Assuntos
Varicocele , Animais , Apoptose , Humanos , Masculino , Minociclina/metabolismo , Minociclina/farmacologia , Minociclina/uso terapêutico , Estresse Oxidativo , Ratos , Ratos Wistar , Testículo/metabolismo , Varicocele/tratamento farmacológico , Varicocele/metabolismo
13.
Exp Mol Pathol ; 123: 104602, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-33422487

RESUMO

Cisplatin is an extensively used chemotherapeutic substance for various types of human malignancies including sarcomas, carcinomas and lymphomas. Yet, the vast application of this drug is hampered by the emergence of chemoresistance in some treated patients. Several mechanisms such as degradation of the membrane transporters by cisplatin have been implicated in the pathogenesis of this event. Recent researches have also indicated the role of long non-coding RNAs (lncRNAs) as well as micoRNAs (miRNAs) in the emergence of resistance to cisplatin in several cancer types. For instance, up-regulation of miR-21 has been associated with resistance to this agent in ovarian cancer, oral squamous cell cancer, gastric malignancy and non-small cell lung cancer (NSCLC). On the other hand, down-regulation of miR-218 has been implicated in emergence of chemoresistance in breast cancer and esophageal squamous cell carcinoma. MALAT1 is implicated in the chemoresistance of bladder cancer cells, NSCLC, gastric cancer and cervical cancer. Most notably, the expression profile of resistance-associated miRNAs and lncRNAs can predict overall survival of cancer patients. Mechanistic assays have revealed that interference with expression of some miRNAs and lncRNAs can reverse the resistance phenotype in cancer cells. In this paper, we review the scientific writings on the role of lncRNAs and miRNAs in the evolution of chemoresistance to cisplatin in cancer cells.


Assuntos
Cisplatino/uso terapêutico , MicroRNAs/genética , Neoplasias/tratamento farmacológico , RNA Longo não Codificante/genética , Apoptose/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Cisplatino/efeitos adversos , Resistencia a Medicamentos Antineoplásicos/genética , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Humanos , Neoplasias/genética , Intervalo Livre de Progressão
14.
Biometals ; 34(3): 439-491, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-33761043

RESUMO

Infertility is regarded as a global health problem affecting 8-12% of couples. Male factors are regarded as the main cause of infertility in 40% of infertile couples and contribute to this condition in combination with female factors in another 20% of cases. Abnormal sperm parameters such as oligospermia, asthenospermia, and teratozoospermia result in male factor infertility. Several studies have shown the deteriorative impact of heavy metals on sperm parameters and fertility in human subjects or animal models. Other studies have pointed to the role of antioxidants in counteracting the detrimental effects of heavy metals. In the currents study, we summarize the main outcomes of studies that assessed the counteracting impacts of heavy metal and antioxidants on male fertility. Based on the provided data from animal studies, it seems rational to administrate appropriate antioxidants in persons who suffer from abnormal sperm parameters and infertility due to exposure to toxic elements. Yet, further human studies are needed to approve the beneficial effects of these antioxidants.


Assuntos
Antioxidantes/farmacologia , Infertilidade Masculina/metabolismo , Metais Pesados/efeitos adversos , Animais , Antioxidantes/metabolismo , Humanos , Masculino , Metais Pesados/metabolismo , Espermatozoides/efeitos dos fármacos , Espermatozoides/metabolismo
15.
Clin Exp Pharmacol Physiol ; 48(3): 291-309, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33462845

RESUMO

Diabetes mellitus is a metabolic disorder defined as an increase in blood glucose levels (hyperglycaemia) and insufficient production or action of insulin produced by the pancreas. Chronic hyperglycaemia leads to increased reactive oxygen species (ROS) production and oxidative stress, which consequently results in insulin resistance, beta cell degeneration, dyslipidaemia, and glucose intolerance in diabetic patients. Chromium has an essential role in the metabolism of proteins, lipids, and carbohydrates through increasing insulin efficiency. This systematic review aimed to evaluate chromium supplementation's potential roles in oxidative stress indices in diabetes mellitus. A systematic search was performed in PubMed, Scopus, Google Scholar, Cochrane, and Science Direct databases until November 2020. All clinical trials and animal studies that assessed chromium's effect on oxidative stress indices in diabetes mellitus and were published in English-language journals were included. Finally, only 33 out of 633 articles met the required criteria for further analysis. Among 33 papers, 25 studies were performed on animals, and eight investigations were conducted on humans. Twenty-eight studies of chromium supplementation lead to reducing oxidative stress indices. Also, 23 studies showed that chromium supplementation markedly increased antioxidant enzymes' activity and improved levels of antioxidant indices. In conclusion, chromium supplementation decreased oxidative stress in diabetes mellitus. However, further clinical trials are suggested in a bid to determine the exact mechanisms.


Assuntos
Glicemia , Diabetes Mellitus Tipo 2 , Estresse Oxidativo , Animais , Humanos , Resistência à Insulina
16.
Genomics ; 112(6): 3883-3889, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-32619575

RESUMO

Hormone-sensitive lipase (HSL) was considered as an essential enzyme in glucolipid metabolism. It has been proposed to be a lead candidate gene for genetic markers of lipid deposition in livestock. The aim of this study was to identify sequence variants (SVs) of the bovine HSL gene and evaluate the relations to intramuscular fat in two indigenous Chinese beef cattle breeds. Expression analysis by quantitative real-time polymerase chain reactions (qPCR) indicated that expression levels of bovine HSL gene were highest in the perirenal fat and heart within two different age stage (adult and calf), respectively. Five SVs were identified by direct DNA sequencing, which included four missense mutations (g.16563C>T, g.16734G>A, g.16896A>G, g.17388G>T) in exon 8 and a synonymous mutation (g.17402C>T) in exon 9. Population genetic analysis showed that except for g.16563C>T and g.17402C>T, all the other detected SVs strongly affected the bovine intramuscular fat content (P < 0.01 or P < 0.05). The individuals with Hap5/5 diplotypes (CC-GG-GG-GG-CC) was highly significantly associated with intramuscular fat content than the other diplotypes (P < 0.01). The above results suggested that the HSL gene can used as potential candidate markers gene for the beef breed improvement through marker assisted selection in Chinese cattle breeds.


Assuntos
Tecido Adiposo/metabolismo , Bovinos/genética , Músculo Esquelético/metabolismo , Polimorfismo de Nucleotídeo Único , Carne Vermelha , Esterol Esterase/genética , Sequência de Aminoácidos , Animais , Estudos de Associação Genética , Haplótipos , Desequilíbrio de Ligação , Especificidade da Espécie , Esterol Esterase/química
17.
J Cell Physiol ; 235(12): 9269-9290, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-32529678

RESUMO

Esophageal cancer is the seventh most common cancer worldwide. Although a number of environmental and lifestyle-related risk factors have been identified for this kind of cancer, the exact molecular mechanisms of tumor evolution have not been clarified yet. Long noncoding RNAs (lncRNAs) and microRNAs (miRNAs) as important regulators of gene expression and chromatin configuration have essential roles in the pathogenesis of esophageal cancer. They have been shown to alter the function of cancer-related signaling pathways such as phosphoinositide 3-kinase/protein kinase B and Wnt pathway, thus they might modulate the response of patients to pathway-targeted therapies. Moreover, a number of lncRNAs, such as AFAP1-AS1, UCA1, HOTAIR, LOC285194, and TUSC7, are involved in conferring chemoresistant/radioresistant in esophageal cancer cells. A complex network of interaction exists between lncRNAs and miRNAs in the context of esophageal cancer. Finally, various panels of lncRNAs and miRNAs have been introduced that can predict the survival of esophageal cancer patients. In this review article, we summarize the recent findings regarding the role of miRNAs and lncRNAs in the pathogenesis of esophageal cancer with the special focus on their regulatory roles on signaling pathways, their potential as diagnostic/prognostic markers, and their relevance with therapeutic response.


Assuntos
Biomarcadores Tumorais/análise , Neoplasias Esofágicas/diagnóstico , Neoplasias Esofágicas/genética , Redes Reguladoras de Genes/genética , RNA Longo não Codificante/genética , Biomarcadores Tumorais/genética , Regulação Neoplásica da Expressão Gênica/genética , Humanos , Fosfatidilinositol 3-Quinases/metabolismo
18.
Exp Mol Pathol ; 113: 104381, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-31954715

RESUMO

Ovarian cancer is a gynecological cancer with high mortality and a heterogeneous nature which complicates its early detection and primary prevention. Numerous studies have evaluated expression profile microRNAs (miRNAs) in tissue and serum samples of ovarian cancer patients to find appropriate biomarkers for this malignancy. Functional experiments also verified the oncogenic or suppressor effects of a number of miRNAs. miRNAs exert their role through degradation or inhibition of translation of the target mRNA. Through this regulatory function, they modulate numerous cellular processes which are ultimately associated with carcinogenesis. A number of miRNAs including miR-135a-3p, miR-200c, miR-216a and miR-340 regulate epithelial-mesenchymal transition program thus modulate invasiveness of ovarian cancer cell. Others have been shown to regulate some fundamental pathways in carcinogenesis such as mTOR and PI3K/AKT pathways. Such vast area of function of miRNAs in ovarian cancer has suggested them as putative therapeutic options for future years. In this review, we summarize the recent findings regarding the role of miRNAs in ovarian cancer pathogenesis, their application as biomarkers and the future perspectives of this research area.


Assuntos
Perfilação da Expressão Gênica , MicroRNAs/biossíntese , MicroRNAs/genética , Neoplasias Ovarianas/genética , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/metabolismo , Transição Epitelial-Mesenquimal/genética , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , MicroRNAs/química
19.
Exp Mol Pathol ; 114: 104411, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32112788

RESUMO

Lung cancer is the most frequently diagnosed malignancy and the leading source of cancer-associated mortality. This kind of cancer has heterogeneous nature and is divided into two broad classes of small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC). In addition to aberrant expression of several signaling pathways and oncogenes, lung cancer is associated with dysregulation of expression of non-coding RNAs including both long non-coding RNAs (lncRNAs) and miRNAs. These aberrantly expressed transcripts are putative therapeutic targets and diagnostic/ prognostic markers. Integrative assessment of expression of lncRNAs, miRNAs and mRNAs has led to construction of competing endogenous RNA networks in which several lncRNAs act as molecular sponges to inhibit regulatory function of miRNAs on mRNAs. Notably, some of these networks seem to have subtype-specific functions in lung cancer. In this review, we summarize recent findings about the importance of these networks in the pathogenesis of lung cancer and provide a list of onco-miRNAs, tumor suppressor miRNAs, oncogenic lncRNAs and tumor suppressor lncRNAs based on their roles in the carcinogenic process in lung cancer.


Assuntos
Carcinogênese/genética , Neoplasias Pulmonares/genética , RNA não Traduzido/genética , Transcriptoma/genética , Biomarcadores Tumorais/genética , Regulação Neoplásica da Expressão Gênica/genética , Redes Reguladoras de Genes/genética , Humanos , Neoplasias Pulmonares/patologia , MicroRNAs/genética , Prognóstico , RNA Mensageiro/genética
20.
Andrologia ; 52(11): e13826, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-32991040

RESUMO

Varicocele is one of the leading causes of male infertility in which oxidative stress induces DNA damages in spermatozoa of patients with varicocele. Recent studies indicated that the treatment with antioxidant agents has protective effects against the formation of reactive oxygen species (ROS). Our research aimed to evaluate the impact of Fumaria Parviflora (FP) on the varicocele-induced testicular injury. For this purpose, 32 adult male Wistar rats (n = 8 per group) were randomly assigned to four groups as follows: sham group, varicocele group, varicocele treatment group and the control treatment group. The experimental groups daily received FP (250 mg/kg) for 8 weeks. The induction of varicocele was conducted by partial occlusion on the left renal vein. The diameter of seminiferous tubules, Johnsen's score and the epithelium thickness improved in the treated-varicocele group as compared to the varicocele group. FP extract could increase the biochemical parameters including superoxide dismutase and glutathione peroxidase, and also decrease malondialdehyde level in the varicocele group. Furthermore, varicocele markedly increased both mRNA and intensity of Bax, while treatment with FP could alleviate them. We concluded that FP could alleviate varicocele, possibly by lowering oxidative stress and testicular damage.


Assuntos
Apoptose , Fumaria , Estresse Oxidativo , Extratos Vegetais , Varicocele , Animais , Expressão Gênica , Humanos , Masculino , Extratos Vegetais/farmacologia , Ratos , Ratos Wistar , Testículo/metabolismo , Varicocele/metabolismo
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