The effects of intensity and duration of aerobic exercise on spatial memory function in male Wistar rats

BACKGROUND Memory is a vital function of the brain. Aerobic exercise has a positive effect on memory’s function, but the appropriate combination of intensity and duration of aerobic exercise is still unknown. This study was aimed to investigate the effect of optimum combinations of intensity and duration of aerobic exercise on spatial memory function

Environmental Enrichment and Aerobic Exercise Enhances Spatial Memory and Synaptophysin Expression in Rats

BACKGROUND: Exposure to environmental enrichment has a positive effect on brain function, including improved cognition. Environmental enrichment has many aspects, including social interactions, object stimulations, and physical activities. Exercise and environmental enrichment can be considered to improve cognitive function with different underlying mechanisms. This study aims to compare the effects of environmental enrichment and aerobic exercise at both synaptic and whole-organism levels using synapyophysin as a measure of synaptic physiology and spatial memory as a measure of cognitive function.METHODS: A six-week in vivo experimental study on 15, 6-month old male Wistar rats randomly divided into three groups (n=5): aerobic group (A), enriched environment group (EE), and enriched with an aerobic or combined group (EEA). All rats were tested four times in the Water-E maze (WEM) task at weeks 0, 2, 4, and 6 of the study. We used immunohistochemistry to determine the synaptophysin expression in hippocampal CA1 region.RESULTS: Based on synaptophysin immunostaining, there were higher optical density scores for synaptophysin in hippocampal CA1 region following EEA, but there were no statistically significant differences between groups (ANOVA test, p>0.05). The spatial memory test showed there were significantly reduced travel time and total errors from the 2nd and 4th weeks in the EEA group, respectively (p<0.05).CONCLUSION: The combination of enriched environment and aerobic exercise seems to rapidly improve spatial memory and enhances the presynaptic protein, synaptophysin in hippocampal CA1 region.KEYWORDS: aerobic exercise, environmental enrichment, spatial memory, synaptophysin, Water-E maz

Potensi Hibiscus sabdariffa Linn. Memodulasi GLP-1 dan Neuropeptide Y (NPY) di Nucleus Arcuatus pada Tikus Obes

Gangguan pada pusat pengaturan nafsu makan dapat menyebabkan obesitas. Glucagon like Peptide -1 (GLP-1) dan Neuropeptide Y (NPY) merupakan dua peptida penting yang terlibat dalam pengendalian nafsu makan. Beberapa penelitian menunjukkan Hibiscus sabdariffa Linn. memiliki potensi dalam pengendalian obesitas dengan memodulasi kadar GLP-1 dan NPY di perifer. Penelitian ini bertujuan untuk mengetahui bagaimana potensi Hibiscus sabdariffa Linn.(HSL) dalam memodulasi kadar GLP-1 dan NPY di sentral khususnya di Nucleus Arcuatus. Penelitian ini merupakan penelitian lanjutan yang menggunakan jaringan otak tikus tersimpan yang berasal dari 24 ekor tikus Spraque Dawley jantan umur 6 -10 minggu, berat badan antara 90 -160 gram, yang dibagi dalam 4 kelompok yaitu: Normal(C); Obes(Ob); Obes-Hib200(Ob-Hib200); Obes-Hib400(Ob-Hib400). Ekstrak HSL diberikan secara oral satu kali per hari selama 5 minggu. Sampel diperoleh dari hasil isolasi ARC, kemudian dilakukan pengukuran kadar GLP-1 dan NPY menggunakan metode ELISA. Hasil penelitian menunjukkan ekstrak HSL dosis 400mg/KgBB/hari dapat meningkatkan kadar GLP-1 paling tinggi, dibandingkan dengan kelompok tikus lainnya, sekaligus dapat menurunkan kadar NPY dibandingkan dengan kelompok tikus Obes(Ob) dan Obes-Hib(200), meskipun secara analisis tidak terdapat perbedaan bermakna. Dosis ekstrak HSL berperan penting dalam efektifitasnya memodulasi kadar GLP-1 dan NPY di ARC untuk membantu mengendalikan nafsu makan sehingga dapat mengurangi resiko terjadinya obesitas.Gangguan pada pusat pengaturan nafsu makan dapat menyebabkan obesitas. Glucagon like Peptide -1 (GLP-1) dan Neuropeptide Y (NPY) merupakan dua peptida penting yang terlibat dalam pengendalian nafsu makan. Beberapa penelitian menunjukkan Hibiscus sabdariffa Linn. memiliki potensi dalam pengendalian obesitas dengan memodulasi kadar GLP-1 dan NPY di perifer. Penelitian ini bertujuan untuk mengetahui bagaimana potensi Hibiscus sabdariffa Linn.(HSL) dalam memodulasi kadar GLP-1 dan NPY di sentral khususnya di Nucleus Arcuatus. Penelitian ini merupakan penelitian lanjutan yang menggunakan jaringan otak tikus tersimpan yang berasal dari 24 ekor tikus Spraque Dawley jantan umur 6 -10 minggu, berat badan antara 90 -160 gram, yang dibagi dalam 4 kelompok yaitu: Normal(C); Obes(Ob); Obes-Hib200(Ob-Hib200); Obes-Hib400(Ob-Hib400). Ekstrak HSL diberikan secara oral satu kali per hari selama 5 minggu. Sampel diperoleh dari hasil isolasi ARC, kemudian dilakukan pengukuran kadar GLP-1 dan NPY menggunakan metode ELISA. Hasil penelitian menunjukkan ekstrak HSL dosis 400mg/KgBB/hari dapat meningkatkan kadar GLP-1 paling tinggi, dibandingkan dengan kelompok tikus lainnya, sekaligus dapat menurunkan kadar NPY dibandingkan dengan kelompok tikus Obes(Ob) dan Obes-Hib(200), meskipun secara analisis tidak terdapat perbedaan bermakna. Dosis ekstrak HSL berperan penting dalam efektifitasnya memodulasi kadar GLP-1 dan NPY di ARC untuk membantu mengendalikan nafsu makan sehingga dapat mengurangi resiko terjadinya obesitas

EFFECT OF HIBISCUS SABDARIFFA LINN METHANOLIC EXTRACT ON HEART HYPERTROPHY INDEX AND PGC-1α IN OVERTRAINED RAT

Objective: Studies have shown that prolonged physical exercise increases ventricular wall mass. Physiologically, this increase is followed by an increase of mitochondrial biogenesis. However, increases of ventricular mass in some cardiovascular diseases are not followed by an increase of PPARγ coactivator-1α (PGC-1α), a marker of mitochondrial biogenesis. No data regarding cardiac PGC-1α during an excessive physical exercise program that causes pathological conditions (overtraining) are available. Thus, we aimed to determine the effect of overtraining on cardiac hypertrophy index and PGC-1α level. Furthermore, we aimed to elucidate the cardio protective effect of Hibiscus sabdariffa Linn. (HSL) administration on these cardiac parameters. Methods: Twenty-five male adult Wistar rats aged 8–10 w were randomly divided into five groups: control (C), control-HSL (C-HSL), aerobic training (A), overtraining (OT), and overtraining-HSL (OT-HSL). Treatments were conducted five times a week, for 11 w. Differences in heart mass were determined by measuring ratios of ventricular weight to body weight (hypertrophy index). PGC-1α levels were measured using an ELISA method. Results: We found that overtraining increased ventricular wall mass; however, it did not increase cardiac PGC-1α levels, whereas mild-aerobic exercise robustly increased cardiac levels of PGC-1α. Furthermore, administration of a methanol extract of HSL did not show any significant effect on cardiac mass or PGC-1α level. Conclusion: Thus, our study showed that ventricular hypertrophy elicited by overtraining conditions was not followed by an increase in cardiac PGC-1α, and administration of H. sabdariffa extract did not ameliorate this condition

EFFECT OF HIBISCUS SABDARIFFA LINN ON IL-6 AND TNF- α LEVELS IN OVERTRAINED RAT HEART

Objective: This study aims to determine the effect of Hibiscus sabdariffa Linn. (HSL) administration on the interleukin-6 (IL-6) and tumor necrosis factor α (TNF-α) levels in rat heart. Overtraining was proven to increase the IL-6 and TNF-α levels in the blood, and HSL had anti-inflammatory and anti-oxidant properties. However, no studies have been conducted on the effect of methanolic extract of HSL administration on the IL-6 and TNF-α levels in overtrained rat heart. Methods: This study used 25 male adult Wistar rats aged 8–10 w and weighing 200–250 g. The rats were randomly divided into five groups: control (C), control H. sabdariffa Linn (C+HSL), overtraining (OT), overtraining H. sabdariffa Linn (OT+HSL), and aerobic (A). Treatment was given 5 times a week for 11 w. At the end of the study, the IL-6 and TNF-α levels were measured using a standard ELISA kit. Results: IL-6 and TNF-α levels in the heart were the highest in the overtraining group. The group that received HSL administration showed the lowest TNF-α and IL-6 levels. Conclusion: HSL could be a used to protect the heart from an inflammatory state, particularly in an overtraining condition

The Effects of Exercise Regimens on Irisin Levels in Obese Rats Model: Comparing High-Intensity Intermittent with Continuous Moderate-Intensity Training

Background. Recently, high-intensity intermittent training (HIIT) appears to have the same beneficial effects or even superior to those of continuous moderate-intensity training (CMIT) on body fat mass reduction. Exercise may induce myokine secretion such as irisin, which plays a role as a mediator of beiging process, and thus might contribute as treatment of obesity. However, the effects of those exercise formulas on irisin level changes as beiging agent are not known. In addition, metabolic states may affect the irisin responses to those exercise formulas. Therefore, this study was aimed to determine the different effects of exercises using HIIT and CMIT on circulating and tissue irisin levels in normal and abnormal metabolic conditions (obese). Methods. Sixteen male Sprague-Dawley rats (8 weeks of age) were randomized to 4 groups according to training regimens (HIIT and CMIT) and metabolic conditions (normal and abnormal/obese). The groups are (1) HIIT on normal metabolic (n=4), (2) CMIT on normal metabolic (n=4), (3) HIIT on abnormal metabolic (n=4), and (4) CMIT on abnormal metabolic (n=4). Abnormal metabolic condition was induced with high fat diet (19% fat) for 8 weeks in obese rats. Irisin levels in serum, skeletal muscle, and white adipose tissue were evaluated by ELISA. Results. Serum irisin levels were shown significantly higher in normal metabolic compared to abnormal metabolic condition (P0.05). Regarding exercise formula, no different effects were found between HIIT and CMIT on skeletal muscle irisin levels in both metabolic conditions (P>0.05). The similar findings were observed in serum irisin levels (P>0.05). Conclusions. The exercise effects in abnormal metabolic condition might be more adaptable in maintaining the irisin levels in skeletal muscle and induce the irisin uptake from circulation into adipose tissue. In addition, HIIT might be more involved to induce irisin uptake into adipose tissue; thus it might have the significant role in beiging process. However, further research about how the HIIT formula affects the regulation mechanisms of irisin uptake into adipose tissue is still warranted

The Potential of Hibiscus sabdariffa Linn. for Treatment of Obesity: Focus on FGF21 in Liver and Adipose Tissue

Obesity is one of the health problems associated with FGF21 resistance. FGF21 is a hormone secreted in the liver and plays a role in energy homeostasis in adipose tissue. FGF 21 is used as an alternative for treating obesity. While the potential of H. sabdariffa for weight loss has been acknowledged, H. sabdariffa&rsquo;s ability to handle FGF 21 is still unknown. This study aims to determine the potential of H. sabdariffa in FGF 21 resistance by measuring FGF 21 in adipose and liver tissue. This study was conducted at Biochemistry Animal House Laboratory at Faculty of Medicine Universitas Indonesia in January until May 2019. This experimental studies using 24 male rats for 6-10 weeks were divided into four groups, namely the normal control group (N), the obese control group (Ob), the obese group with H. sabdariffa dose 200 mg/kgBW/day (Ob-Hib 200), and obese groups with H. sabdariffa dose 400 mg/kgBW/day (Ob-Hib 400). H. sabdariffa is given every day for 5 weeks in a row. Examination of FGF21 protein in white adipose tissue and liver using the ELISA test. ANOVA test results showed an increase in FGF21 levels in adipose tissue in obese rats given H. sabdariffa extract dose of 400 mg/kgBW/day (p&lt;0.05) and even significantly different than normal conditions (p&lt;0.05). The results showed that a dose of 400 mg/kgBW had the potential to increase FGF21 levels in the liver (p&lt;0.05). In conclusion, giving extract of H. sabdariffa has the potential for handling FGF21 resistance because H. sabdariffa is able to increase FGF 21 levels in adipose and liver tissue. Keywords: FGF21, H. sabdariffa, obese. &nbsp; Potensi Hibiscus Sabdariffa untuk Mengobati Obesitas: Fokus pada FGF21 di Jaringan Hati dan Adiposa &nbsp; Abstrak Obesitas berhubungan dengan resistensi FGF21. FGF21 merupakan hormon yang disekresikan oleh hati dan berperan dalam homeostasis energi di jaringan adiposa. FGF21 digunakan sebagai alternatif dalam penanganan obesitas, namun potensi H. sabdariffa dalam menurunkan berat badan belum pernah dilakukan dan potensinya dalam pengaturan FGF21 juga belum diketahui. Penelitian bertujuan mengetahui potensi H. sabdariffa dalam mengatasi resistensi FGF21 melalui pengukuran kadar FGG21 di jaringan adiposa dan hati. Penelitian dilakukan di Laboratorium Hewan Biokimia Fakultas Kedokteran Universitas Indonesia pada bulan Januari-Mei 2019. Studi eksperimental ini menggunakan 24 tikus jantan 6-10 minggu yang dibagi menjadi 4 kelompok, yaitu kelompok normal (N), kelompok kontrol obese (Ob), kelompok obese dengan pemberian H. sabdariffa 200 mg/kgBB/hari (Ob-Hib 200), dan kelompok obese dengan pemberian H. sabdariffa 400 mg/kgBB/hari (Ob-Hib 400). H. sabdariffa diberikan selama 5 minggu berturut-berturut sehari sekali. Pemeriksaan protein FGF21 di jaringan adiposa dan hati menggunakan metode ELISA. Uji ANOVA menunjukkan peningkatan FGF21 di jaringan adiposa pada tikus obese yang diberikan H. sabdariffa dengan dosis 400 mg/kgBB (p&lt;0,05) dan memiliki perbedaan signifikan dengan kelompok normal (p&lt;005). Selain itu, pemberian H. sabdariffa dengan dosis 400 mg/kg BB pada jaringan hati meningkatkan kadar FGF21 (p&lt;0,05). Disimpulkan H. sabdariffa memiliki potensi untuk mengatasi resistensi FGF21 karena meningkatkan kadar protein FGF21 baik di jaringan adiposa maupun hati. Kata kunci: FGF21, H. sabdariffa, obesitas

Anti-inflammatory Effects of Hibiscus Sabdariffa Linn. on the IL-1β/IL-1ra Ratio in Plasma and Hippocampus of Overtrained Rats and Correlation with Spatial Memory

Overtraining leads to an increase in IL-1β systemically due to muscle microtrauma, which affects the hippocampus, an important structure in spatial memory consolidation. The administration of Hibiscus sabdariffa Linn is expected to decrease IL-1β and increase IL-1ra, thereby potentially preventing impairments in spatial memory consolidation. This research was an experimental study using 20 male Wistar rats. The overtraining of Wistar rats altered the ratio of IL-1β/IL-1ra in the plasma and hippocampus. Moreover, this overtraining impaired spatial memory consolidation. The methanol extract of H. sabdariffa improved spatial memory consolidation in Wistar rats and prevented impairment in spatial memory consolidation by maintaining the ratio of IL-1β/IL-1ra in the plasma and hippocampus of Wistar rats who experienced overtraining. H. sabdariffa is a potent anti-inflammatory substance that prevents impairments in spatial memory consolidation in overtrained Wistar rats

Anti-inflammatory Effects of Hibiscus Sabdariffa Linn. on the IL-1β/IL-1ra Ratio in Plasma and Hippocampus of Overtrained Rats and Correlation with Spatial Memory

Overtraining leads to an increase in IL-1β systemically due to muscle microtrauma, which affects the hippocampus, an important structure in spatial memory consolidation. The administration of Hibiscus sabdariffa Linn is expected to decrease IL-1β and increase IL-1ra, thereby potentially preventing impairments in spatial memory consolidation. This research was an experimental study using 20 male Wistar rats. The overtraining of Wistar rats altered the ratio of IL-1β/IL-1ra in the plasma and hippocampus. Moreover, this overtraining impaired spatial memory consolidation. The methanol extract of H. sabdariffa improved spatial memory consolidation in Wistar rats and prevented impairment in spatial memory consolidation by maintaining the ratio of IL-1β/IL-1ra in the plasma and hippocampus of Wistar rats who experienced overtraining. H. sabdariffa is a potent anti-inflammatory substance that prevents impairments in spatial memory consolidation in overtrained Wistar rats