Shiva Khoramshahi; Mohammadreza Kordi; Fatemeh Shabkhiz; Abbas Ali Gaeini
Abstract
Background and Aim: Alzheimer’s is a neuroendocrine disease related to insulin signaling, due to the association of Alzheimer’s disease with the reduction of insulin production and resistance, the term type III or cerebral diabetes has become popular in this regard. Accumulation of Advanced ...
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Background and Aim: Alzheimer’s is a neuroendocrine disease related to insulin signaling, due to the association of Alzheimer’s disease with the reduction of insulin production and resistance, the term type III or cerebral diabetes has become popular in this regard. Accumulation of Advanced glycation end products (AGEs) is associated with aging, inflammation, and neurodegenerative diseases. AGEs increase the accumulation of amyloid oligomers in the brain causing neurotoxicity. The beneficial effect of physical activity on the brain has been established, but the effect of voluntary exercise in an enriched environment had been less investigated. Therefore, the aim of this study was to identify the effect of 8 weeks of voluntary exercise in an enriched environment on the expression of AGEs protein, Amyloid beta, and cell death rate in the hippocampal tissue of male Wistar rats with type III diabetes. Materials and Methods: Twenty 10-week-old male rats were randomly divided into four groups including healthy control, sham, type III diabetes, and type III diabetes group+ voluntary exercise in an enriched environment. The intervention group trained in the cage two hours a day for eight weeks. To analyze the data, one-way analysis of variance and Tukey’s post hoc test were used at a significance level of p≤0.05. Results: Voluntary exercise in the enriched environment caused a significant decrease in AGEs protein expression and amyloid beta accumulation in the hippocampus (p=0.0001). Also, the rate of cell death in the voluntary exercise group was significantly reduced compared to the control of diabetes type III (p=0.0001). Conclusion: It seems that the activity in the enriched environment probably changes of AGEs and Amyloid beta by improving insulin resistance and increasing insulin production, and has favorable effects in reducing the signs of dead cells and improving cognitive function in type III diabetes.
Seyed Morteza Sajadi; Mohammadreza kordi; Seyyed Reza Attarzadeh Hosseini; Hamzeh Akbari Bokani; Mahdi Aliakbari
Abstract
Background and Aim: Evidence has shown that C-reactive protein (CRP) is not only an inflammatory biomarker but also an important risk factor associated with aging-related diseases including cardiovascular, metabolic, and kidney disorders. Therefore, the aim of this study was to investigate the comparison ...
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Background and Aim: Evidence has shown that C-reactive protein (CRP) is not only an inflammatory biomarker but also an important risk factor associated with aging-related diseases including cardiovascular, metabolic, and kidney disorders. Therefore, the aim of this study was to investigate the comparison of serum high-sensitivity CRP (hs-CRP) and lipid profile levels in active and sedentary elderly people during the first peak of Covid-19 pandemic. Materials and Methods: Seventy seven elderly men and women (mean age 61.43±6.07 years) based on body mass index (BMI) were divided into three groups including the healthy (BMI as 18.5-24.9 kg/m2), overweight (BMI as 25-29.9 kg/m2), and obese (BMI as more than 30 kg/m2) groups. Serum lipid profile and hs-CRP, and waist-hip ratio (WHR) were measured in the study groups. Data analysis was performed using one-way analysis of variance (ANOVA), chi-square (χ2) and regression coefficient at the significant level of p≤0.05. Results: The average levels of hs-CRP in obese older were significantly higher than normal weight (p=0.01). Also, serum hs-CRP and low density lipoprotein cholesterol (LDL-C) were significantly higher in elderly people with low physical activity level than same people with moderate physical activity level (p=0.0001 and p=0.006; respectively). A negative and significant correlation was also observed between the level of physical activity with WHR (p=0.01) and BMI (p=0.006). Conclusion: Obese older adults who are inactive and with least physical activity in the condition of Covid-19 pandemic due to high hs-CRP and LDL-C, are more at risk of inflammation and weakened immune system.
Zohreh Shanazari; Mohammad Faramarzi; Mohammadreza kordi
Abstract
Background and Aim: Muscle atrophy is an active process controlled by specific signaling pathways and transcriptional programs. Atrogin-1/MAFbx and MuRF1 are up-regulated in different models of muscle atrophy and is responsible for increased protein degradation through the ubiquitin proteasome pathway. ...
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Background and Aim: Muscle atrophy is an active process controlled by specific signaling pathways and transcriptional programs. Atrogin-1/MAFbx and MuRF1 are up-regulated in different models of muscle atrophy and is responsible for increased protein degradation through the ubiquitin proteasome pathway. The purpose of this study was to investigate the effect of moderate and high intensity resistance training on miR-23a, Atrogin-1 and MuRF gene expression in fast and slow twitch muscles in elderly rats. Materials and Methods: Thirty male Wistar rats (23 months old) were randomly divided into three groups (n=10) including moderate-intensity resistance training, high-intensity resistance training and the control groups. Resistance training were performed during eight weeks of climbing a ladder with high intensity (80% Maximum voluntary carrying capacity/MVCC) and moderate intensity (60% of MVCC) for 5 days a week. Isolation of Soleus muscle and Flexor halluces longus (FHL) was performed immediately after blood sampling in sterile conditions. MiR-23a, Atrogin-1 and MuRF expression were measured by RT-PCR method in Soleus and FHL muscles. The statistical analysis was performed by One-way & Two-way ANOVA tests with significance level of p<0.05. Results: The results showed that the expression of MuRF and Atrogin-1 genes in both resistance groups were significantly lower than those the control group and miR-23a expression expression in both high and moderate resistance groups was significantly higher than the control group (p<0.05). But there was no significant difference between the effect of high and moderate intensity resistance training on miR-23a, MuRF, and Atrogin-1 expression in both muscles (p>0.05). Conclusion: It seems that resistance training with moderate and high-intensity can decrease the resting levels and gene expression of factors associated with muscular atrophy (miR-23a) and its target genes (Atrogin-1, MuRF) in older rats, and these exercises could lead to the prevention of sarcopenia.
Mostafa Sabouri; Mohammad Reza Kordi; Fatemeh Shabkhiz
Abstract
Background and Aim: Alzheimer’s disease is a progressive disorder of the nervous system. Inflammation plays an important role in neurological dysfunction and loss of neuronal cells in Alzheimer’s disease. Previous studies have shown that cAMP response element-binding protein (CREB) activity ...
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Background and Aim: Alzheimer’s disease is a progressive disorder of the nervous system. Inflammation plays an important role in neurological dysfunction and loss of neuronal cells in Alzheimer’s disease. Previous studies have shown that cAMP response element-binding protein (CREB) activity decreases with beta amyloid and inflammation. Therefore, the purpose of this study was to investigate the effect of aerobic training before and after induction of Alzheimer on interleukin-1β (IL-1β) and CREB gene expression of Wistar male rats. Materials and Methods: The number of 115 male adult rats (eight-week old) with an average weight of 250±17.20 grams in the pre-Alzheimer’s stage were randomly divided into two equal resting (55 heads) and exercise (55 heads) groups. After four weeks and after induction of Alzheimer’s disease, the rats of each group were divided into three subgroups including Amyloid injection, injecting the placebo, and without injection groups. Before the start of the study, animals were killed (5 heads in each group) and their hippocampus removed after four weeks of training (before and after Alzheimer’s induction). IL-1β and CREB expression were measured by Real Time-PCR method and data were analyzed in two stages before and after Alzheimer’s induction with one way- analysis of variance and least significant difference (LSD) tests at the significant level of p≤0.05. Results: Both in the pre and post-Alzheimer’s stages, IL-1β and CREB expression decreased and increased significantly (p<0.05) in the training group compared to the resting group, respectively. Conclusion: Aerobic exercise can increase of CREB expression and reduction of inflammation before and after Alzheimer’s induction, and it probably contributes to hippocampal plasticity in this way and has cognitive or functional benefits.
Mohammad mahdi Rafiei; Abbas Ali Gaeini; Mohammadreza kordi; Reza Nuri
Abstract
Background and Aim: Considering the key role of apoptosis and other factors in inflammation, growth and metastasis of tumor cells and also regulating effect of physical activity, the aim of this study was to investigate the effects of aerobic exercise on the expression of these factors in breast cancer ...
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Background and Aim: Considering the key role of apoptosis and other factors in inflammation, growth and metastasis of tumor cells and also regulating effect of physical activity, the aim of this study was to investigate the effects of aerobic exercise on the expression of these factors in breast cancer and also on breast cancer tumors weight reduction in mice. Materials and Methods: Twenty female 3-weeks-old C ball mice with a mean weight of 17.10±0.10 g were randomly divided into experimental (aerobic exercise) and control groups. By subcutaneous injection of MC4-L2 cancer cells, both groups were diagnosed with cancer, and then the experimental group was trained for 8 weeks (5 sessions per week and each session lasted 14-20 minutes running at 55-70 percent of VO2max on the treadmill with zero gradient. The exercises began at a speed of 14 m/min in the first week and finally reached to 20 m/min in the last two weeks. 48 hours after the last training session, the mice were sacrificed and their tumors tissue samples were removed and stored at -70 ° C and the level of gene expression of Apaf-1 and caspase 3 of tumor tissue were measured by Real Time-PCR. Data were analyzed by SPSS21 using independent sample t- test at the significant level of p≤0.05. Results: The results of independent sample t- test showed that tumor volume in the training group was significantly lower than the control group (p=0.001), moreover the levels of Apaf-1 (p=0.001) and caspase 3 (p=0.001) was also significantly higher than the control group. Conclusion: Due to the increased gene expression of Apaf-1 and caspase 3 following regular aerobic exercise with intensity of 55 to 70% VO2max, it can be suggested that medium-intensity aerobic exercise can controls the growth of breast tumors in female Balb C mice.
Saman Hadjizadeh Anvar; Mohammadreza Kordi; Parisa Pournemati; Sara Farajnia; Nima Gharadaghi; Mohammadreza Rahmati
Abstract
Background and Aim: It is mentioned a critical role for peroxisome proliferator-activated receptor gamma coactivator 1α (PGC-1α) in mitochondrial biogenesis, and for irisin in angiogenesis, myogenesis and health. The purpose of this study was to investigate the effect of cold-water immersion ...
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Background and Aim: It is mentioned a critical role for peroxisome proliferator-activated receptor gamma coactivator 1α (PGC-1α) in mitochondrial biogenesis, and for irisin in angiogenesis, myogenesis and health. The purpose of this study was to investigate the effect of cold-water immersion (CWI) post repeated sprint activity (RSA) on irisin & PGC-1α. Materials and Methods: Among 50 soccer players recruited from Tehran premier league, 20 men (age 23.5±1.67 yrs) were selected randomly to this study and after the RSA, 10 participants immersed in cold water (14°C) and 10 others set on a chair passively. Blood sampling was taken before and after RSA, after CWI or passive rest and after 24 hours. Serum irisin & PGC-1α were assessed through ELIZA kit of ZelBio, Germany. Shapiro-Wilk test was performed to determine data normality and to determine possibly differences between means in each group and in different times, analysis of variance test with repeated measures was applied at the significant level of p≤0.05. Results: The time factor had a significant effect on PGC-1α levels [F(3,51)=6.52, p=0.001, pη2=0.27], but the group effect [F(1,17)=0.79, p=0.38] and time - group interaction [F(3,51)=1.53, p=0.21] was not significant. PGC-1α had a significant increases after the RSA in both groups (p=0.004), but its changes were not significant after CWI or rest (p=1.00). In addition, PGC-1α changes was not significant after 24h (p=1.00). Moreover, the time factor had a significant effect on irisin levels [F(3,51)=15.38, p<0.001, pη2=0.47], but the group effect [F(1,17)=0.48, p=0.49] and the time – group interaction [F(3,51)=1.91, p=0.14] were nor significant. In other hand, irisin had a significant increases after the RSA in both groups (p<0.001), but its changes were not significant after CWI or rest (p=0.06). Further, the changes of irisin was not significant after 24h (p=1.00). Conclusion: It seems that the RSA could improve cellular processes through PGC-1α & irisin elevation.
Mojtaba Khaki; Abbasali Gaeini; Mohammad Reza Kordi; Mohammad Reza Rahmati; Abbas Hoseini; Saman Hajizadeh
Abstract
Background and Aim: Today, finding the best recovery method for athletes is very important. The purpose of this study wasto measure the effects of repeated sprint activities (RSA) and 12 minutes immersion (CWI) in cold water (14 ₒ C) immediately after performance of RSA on fatigue serum inflammatory ...
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Background and Aim: Today, finding the best recovery method for athletes is very important. The purpose of this study wasto measure the effects of repeated sprint activities (RSA) and 12 minutes immersion (CWI) in cold water (14 ₒ C) immediately after performance of RSA on fatigue serum inflammatory biomarkers as Interleukin-6 (IL-6) and Tumor necrosis factor alpha (TNF-α) in active men.Materials and Methods: The research adopted a quasi-experimentalmethod and the statistical population was20-26 year-old active men. in this was 20 active males after performance of RSA randomlywere divided into two groups as control passive recovery (PAS) and experimental (CWI) groups. Blood samples were taken from both groups, immediately before and 24 hours after immersion in cold water. For statistical analysistheWilcoxon and Repeated measures and ANOVA tests were used (p<0.05). Results: The results showed that RSA training significantly increased the TNF-α and IL-6 (p=0.02 & p=0.0001 respectively). However, the CWI significantly decreased the levels of TNF-α (p=0.006). Although, the CWI and PAS after RSA, could not prevent from increaseing in serum IL-6 levels, however in the cold water group, this increase was lower (p=0.001). After sprint activity, CWI caused significant reduction in serum levels of TNF-α in 24 hours after CWI (p=0.01), moreover, the CWI and PAS significantly decreased the levels of IL-6 after 24 hours of cold water recovery (p=0.01). Conclusion: Cold water immersiom and also cold with a local reduction in permeability of blood vessels could limit or delaythe accumulation of inflammatory factors.
