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Showing 3 results for Atrophy
Atrophy of hippocampal subfields as a diagnostic biomarker in alzheimer's disease patients and its differentiation from mild cognitive impairment disorders
Yunus Soleymani, Amir Reza Jahanshahi, Davood Khezerloo ,
Volume 80, Issue 11 (2-2023)
Abstract
Background: Atrophy of hippocampal subfields is one of the diagnostic biomarkers of Alzheimer's disease, which has also been observed in many patients with mild cognitive impairment. There is still no clear understanding of the atrophy pattern of hippocampal subfields in Alzheimer's disease and its differentiation from mild cognitive impairment. In this cross-sectional study, hippocampal subfield atrophy in Alzheimer's patients were compared with patients with early (EMCI) and late (LMCI) cognitive impairment and the control group.
Methods: This was a cross-sectional study conducted from September 2021 to September 2022 in the radiology department of Tabriz Paramedical Faculty. MRI images of Alzheimer's patients, EMCI patients, LMCI patients, and normal controls (NCs) were obtained from the ADNI database. Different hippocampus subfields of hippocampal fissure, dentate gyrus head, dentate gyrus body, first cornu ammonis body, cornu ammonis head, subiculum body, and subiculum head were isolated using the hippocampus segmentation tool in FreeSurfer 7.0 software. The volume of all subfields was calculated bilaterally and normalized. The volume difference of each hippocampus subfield between the groups participating in the study and the pair volume difference between the groups was analyzed using the Kruskal-Wallis H Test and post-hoc Dunn's test. The P<0.05 was considered as the significance level.
Results: The most significant volume difference between the four groups participating in the study was related to the whole hippocampus, DG body, subiculum body, and subiculum head subfields (P<0.0001). Also, when examining pairs, the most significant difference was observed between the NC/AD pair (P<0.0001) and the least significant difference between the pair of LMCI/AD group (P<0.05) and in the subfield subiculum body showing the progressive course of hippocampal subfield atrophy with cognitive progress towards Alzheimer's disease.
Conclusion: In most subfields of the hippocampus, a significant difference in atrophy can be seen, increasing the severity of atrophy as the disorder progresses toward Alzheimer's. Such findings can help guide future studies to improve diagnostic performance to identify individuals at high risk of Alzheimer's disease.

Effect of ten-week lower limb progressive resistance training on muscle quality of life and fatigue in adults with spinal muscular atrophy type III
Khadije Sohrabi, Abbas Ali Gaeini , Elham Shirzad , Shahram Khorshidi , Shahriar Nafissi, Hamid Reza Fateh,
Volume 82, Issue 4 (7-2024)
Abstract
Background: Spinal Muscular Atrophy (SMA) is a neurodegenerative disorder caused by a mutation in the survival motor neuron 1 (SMN1) gene. It is classified into five types (from type 0 to 4) based on the age of onset of symptoms and maximum motor function. This autosomal recessive mutation results in progressive weakness and atrophy of the proximal muscles. Due to the high cost of treatment, the critical timing of intervention, and the varied responses of patients, many individuals do not sufficiently benefit from current therapeutic methods. This study evaluates the impact of resistance training on the quality of life and fatigue in patients with SMA type III, considering the potential benefits of such training.
Methods: The present study was developmental and semi-experimental. Fourteen ambulatory patients with SMA type III were randomly assigned to exercise and control groups. The exercise group engaged in lower limb resistance training at an intensity of 6 to 8 on an adult resistance exercise scale for 10 weeks (25 sessions). During this period, the control group maintained their usual daily activities. Patients in the exercise group did not engage in any exercise activity other than the protocol of the present study. Patients' quality of life was measured with the Short Form 36 (SF-36) questionnaire, and fatigue severity was measured with the Fatigue Severity Scale (FSS), both evaluated pre- and post-intervention. The assessments and exercises were conducted in the occupational therapy department of Shariati Hospital, Tehran, from July 2023 to September 2023.
Results: Analysis of the results showed significant improvements (P<0.05) in the exercise group compared to the control group in the subscales of physical functioning and fatigue within the quality of life assessment. Additionally, notable differences were found between the groups on the fatigue intensity scale. However, No significant difference was observed in the patients' Body Mass Index (BMI) measurements.
Conclusion: Progressive resistance training of the lower limbs enhances the quality of life and reduces fatigue in patients with SMA type III.

Investigating the effect of aerobic training and Ursolic acid consumption on the expression of some genes of the sarcopenia and osteoporosis signaling pathways in type 2 diabetic model aged rats
Mohammad Hossein Rabbani , Parvin Farzanegi, Mohammad Ali Azarbayjani ,
Volume 82, Issue 6 (9-2024)
Abstract
Background: Aerobic exercise and the consumption of certain supplements, such as ursolic acid, may reduce sarcopenia and osteoporosis by activating or inhibiting specific genes and signaling pathways. This study aimed to investigate the effects of aerobic exercise and ursolic acid supplementation on the expression of genes related to inflammatory and autophagy pathways in type 2 diabetes.
Methods: This experimental study was conducted from May 2023 to October 2023 at Islamic Azad University, Sari Branch. A total of 30 male Wistar rats (12 months old, mean weight 390 g) were randomly assigned to five groups: 1) healthy (normal), 2) diabetic, 3) diabetic+exercise, 4) diabetic+supplement, 5) diabetic+exercise+ supplement. Diabetes was induced via intraperitoneal injection of streptozotocin (50 mg/kg body weight). The aerobic exercise protocol was performed five days a week for eight weeks. The supplement groups received a daily intraperitoneal injection of ursolic acid (250 mg/kg body weight).
Results: Data analysis showed that there was a statistically significant difference between the groups in the expression levels of LC3, Becline-1, TNFα, IL-1β Akt, and FOXO3 genes (P=0.000). The results of the post hoc test also showed that the expression level of LC3, Becline-1, TNFα, IL-1β genes in the model group increased significantly compared to the normal group (P=0.000). A significant difference was observed between intervention groups (P<0.05). The results of the follow-up test also showed that the level of expression of Akt genes in the model group was significantly decreased compared to the normal group (P=0.000). No significant difference was observed between intervention groups (P<0.05).
Conclusion: The results of the study showed that regular aerobic training and Ursolic acid consumption can affect inflammatory and autophagy pathways. These effects reduce cell atrophy through changes in some biological signals and help improve muscle function in type 2 diabetes. Therefore, aerobic training and Ursolic acid consumption can serve as an effective strategy for improving metabolic status and preventing cellular damage in this patient population.

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