Yang Yang;Shan Huang;Jun Wang;Xiao Nie;Ling Huang;Tianfa Li
The Korean Journal of Physiology and Pharmacology
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v.28
no.1
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pp.39-48
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2024
Wogonin, extracted from the roots of Scutellaria baicalensis Georgi, has been shown to suppress collagen deposition in spontaneously hypertensive rats (SHRs). This study was performed to investigate the role and mechanism of wogonin underlying vascular remodeling in SHRs. After injection of SHRs with 40 mg/kg of wogonin, blood pressure in rats was measured once a week. Masson's trichrome staining was conducted to observe the changes in aortas and mesenteric arteries. Vascular smooth muscle cells (VSMCs) isolated from rat thoracic aortas were treated with Angiotensin II (Ang II; 100 nM) in the presence or absence of varying concentrations of wogonin. The viability and proliferation of VSMCs were examined using Cell Counting Kit-8 assay and 5-ethynyl-2'-deoxyuridine assay, respectively. The migration of VSMCs was examined using wound healing assay and transwell assay. We found that wogonin administration alleviated hypertension, increased lumen diameter, and reduced the thickness of the arterial media in SHRs. Ang II treatment enhanced the viability of VSMCs, which was inhibited by wogonin in a concentration-dependent manner. Wogonin reversed Ang II-induced increases in the viability, proliferation, and migration of VSMCs. Moreover, wogonin inhibited Ang II-induced activation of mitogen-activated protein kinase (MAPK) signaling in VSMCs. Overall, wogonin repressed the proliferative and migratory capacity of VSMCs by regulating the MAPK signaling pathway, thereby attenuating vascular remodeling in hypertensive rats, indicating that wogonin might be a therapeutic agent for the treatment of vascular diseases.
The kinetic properties and isozyme expression of lactate dehydrogenase (EC 1.1.1.27; LDH) in tissues from Rana catesbeiana I and II collected from February (I) and August (II) were studied. LDH activities, A4 isozyme, and LDH/citrate synthase (EC 4.1.3.7; CS) were high in skeletal muscle from R. catesbeiana I, and LDH $B_4$ isozyme increased in several tissues of R. catesbeiana II. In particular, LDH activities were high in heart and brain tissues from R. catesbeiana II. LDH eye-specific C isozyme, detected by native polyacrylamide gel electrophoresis after immunoprecipitation, was expressed in eye tissue and was more similar to the $B_4$ than $A_4$ isozyme. LDH $A_4$ isozyme was purified by oxamate-linked affinity chromatography, and the molecular weight of subunit A was 32.0 kDa. In R. catesbeiana II, levels of $Km^{PYU}$, $Vmax^{LAC}$, and tolerance to lactate of LDH were high in all tissues, and $Vmax^{PYU}$ of LDH in heart and brain tissue was highly detected. Purified $A_4$ isozyme and LDH in eye tissue were highly tolerate compared to others. The $Km^{LAC}$ value was highly measured compared to $Km^{PYU}$. The degree of inhibition by 10 mM of pyruvate on LDH activities in tissues from R. catesbeiana I and II was more pronounced as the ratio of subunit B increased. As a result, characteristic expression of LDH eye-specific C was found in R. catesbeiana. Anaerobic metabolism seemed to predominate as the LDH of skeletal muscle from I showed higher activity. It also appeared that R. catesbeiana II adapted well to incremental increases in LDH B, becoming tolerant to the lactate of LDH in tissues.
An experiment was conducted to study the effect of feeding ammoniated wheat straw treated with and without HCl on meat quality and various sensory attributes of growing male buffalo (Bubalus bubalis) calves. Due to urea-ammoniation, the CP content of wheat straw increased from 2.90 to 6.96%. The addition of HCl along with urea during urea-ammoniation further increased the CP content to 10.09%. The proximate composition (% fresh basis) of psoas major, longissimus dorsi and semitendinosus were comparable among the groups. However, comparatively higher cumulative muscle mean protein and ash percentage and lower moisture percentage in groups II and III in comparison to group I indicated the desirable effect of feeding AWS and HCl-AWS. The cumulative muscle mean pH in group III (5.54) was comparatively lower than group I (5.65) and II (5.62). The cumulative group mean pH and water holding capacity (% water retained) in semitendinosus was comparatively lower than psoas major and longissimus dorsi. The cumulative muscle mean SSP (g%) was significantly (p<0.05) lower in group III (41.78) than group I (42.45). The cumulative group mean cooking loss (%) was significantly (p<0.01) lower in psoas major (31.61) and longissimus dorsi (29.78) than semitendinosus (35.10). The cumulative group mean SFV (kg/$cm^{2}$) of psoas major, longissimus dorsi and semitendinosus were 6.38, 6.32 and 6.56, respectively, being lowest in psoas major and highest in semitendinosus. However, the cumulative muscle mean SFV (kg/$cm^{2}$) in group I, II and III were 6.53, 6.56 and 6.17, respectively, being lowest in group III and highest in group II. The scores of the cooked (2% common salt) buffen for various sensory attributes viz. appearance, flavour, juiciness, texture, mouth coating and overall palatability were comparable among the groups. Results suggested that feeding of ammoniated wheat straw treated with and without HCl to growing male buffalo calves for 180 days had no adverse effect on the meat quality and various sensory attributes.
Nutrient availability may control muscle growth directly and indirectly through its influence on regulatory factors. We analyzed the effects of nutrient availability on the breast muscle insulin-like growth factor system. Real time RT-PCR was used to quantify the level of transcription in breast muscle from Langshan (LS) layer and Arbor Acres (AA) broiler chickens subjected to different feeding regimens during embryonic and postnatal development. The AA chickens were fed AA diet (AA, control group) while the LS chickens were either fed LS diet (LL) or AA diet (LA). According to our results, insulin-like growth factor (IGF)-II (embryonic day 16 (E16) - postnatal day 42 (P42)), IGF-I receptor (IGF-IR, E18-P42), and IGF binding protein (IGFBP)-2 (E18-P42), -5 (E16-P14), -7 (E12-P0), and -3 (E12-P0) were positively correlated with IGF-I, while IGFBP-3 (P0-P28) was negatively correlated with IGF-I. In comparison, IGF-IR (E18-P42), IGFBP-2 (E18-P42), IGFBP-5 (E14-P0), and IGFBP-3 (E16-P0) were positively correlated with IGF-II, while IGF-IR (E10-E16) and IGFBP-3 (P0-P28) were negatively correlated with IGF-II. Moreover, IGFBP-2 (E16-P42), -7 (E10-E16), and -3 (E10-E16) were positively correlated with IGF-IR, while IGFBP-3 (P0-P28) was negatively correlated with IGF-IR. Finally, IGFBP-7 (E12-P0) was positively correlated with IGFBP-3, while IGFBP-2 (P0-P28) and -7 (P0-P42) were negatively correlated with IGFBP-3. Overall, the AA chickens exhibited higher levels of IGF-I, IGF-IR, and IGFBP-2 mRNA expression than the LL chickens, while the opposite was true for IGFBP-7. No strain differences in IGF-I, IGF-IR, and IGFBP-7 mRNA expression were detected between LA and AA chickens; however, a strain difference was observed for IGFBP-2. LA chickens exhibited higher levels of IGFBP-2 than LL chickens, while the opposite was true for IGFBP-7. Our data show the first evidence that certain genes may be correlated during specific developmental periods and that strain differences in the expression of those genes in LS and AA chickens are due to differential responses to the same diet.
Shin, Donghyun;Kim, Kyoung Hwan;Lee, Ji Hyun;Cho, Byung-Wook
Journal of Life Science
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v.28
no.10
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pp.1127-1131
/
2018
Cortisol, a steroid hormone, functions within metabolism, immune response, and stress. Intense or prolonged physical exercise increases cortisol levels to enhance the gluconeogenesis pathway and stabilize blood glucose level. However, cortisol also exerts a negative impact on muscle function and creates a stressful environment in skeletal muscle cells. The present study investigated the function of cortisol as a stress hormone. To examine the effect of the exercise-induced hormone cortisol on skeletal muscles, C2C12 cells were cultured and treated with cortisol at different concentrations. As a result, we found that the morphology of C2C12 changed remarkably with 5 ug/ml cortisol treatment. Western blot analysis was conducted to learn whether ER-stress and autophagy were induced. We found that the expression ratio of LC3I/LC3II decreased and BiP expression increased after cortisol treatment. In addition, immunocytochemistry analysis with IER3 antibody clearly showed that apoptosis is induced after 12-hour cortisol treatment. These results indicate that cortisol treatment could induce apoptosis, ER-stress, and autophagy in muscle cells. This study would provide valuable information in the study of the effects of exercise on skeletal muscle cells and the development of additives to reduce cortisol stress.
Pediatric surgeons are familiar with the posterior sagittal approach to the rectum at sacrococcygeal area and well oriented with the anatomy because of the Penal procedure for imperforate anus. The author utilized the posterior vertical elliptical incisions in 12 cases of sacrococcygeal teratoma since 1987. For presacral tumor(type IV)$^2$, the incision was exactly same as the posterior sagittal procedure for imperforate anus. But the out-growing(type I) or dumbbell-shaped(type II & III) tumors, a vertical elliptical incision was required. For the laterally deviated tumors, a vertical and half-chevron incision was utilized in one case, but an unbalanced vertical elliptical incision was acceptable for the remaining two cases, with shrinkage of the overlying skin. In dumbbell-shaped tumors(type II & III), the narrow waist of the tumor was at the level of the levator muscle, which formed a muscle-belt on the tumor waist. A careful dissection to save the muscle-belt seemed to be the most important point during this procedure, utilizing the nerve-stimulator. After complete removal of the tumor and the coccyx, the levator muscles and the skin were closed in vertical fashion along the midline. For the caudally extending tumors in 3 cases, the muscle complex was divided in midline. Nothing by mouth and total parenteral nutrition was maintained for 1 week and then laxatives were given for 2 weeks in order to give the sphincters rest. Operative scars were acceptable resembling natural vertical midline folds, and the sphincter function was continent in all cases. In conclusion, vertical elliptical incision in sacrococcygeal teratoma is recommended because of the acceptable scar, functional restoration, and because it is a familiar procedure particularly for the pediatric surgeons who are accustomed performing posterior sagittal approach for imperforate anus.
The purpose of this study was to test the microcurrent electrical neuromuscular stimulation on muscle soreness, serum creatine kinase levels and force deficits evident following a high-intensity eccentric exercise bout. 10 volunteer male subjects were randomly assigned to a treatment group or to a control group. Exercise consisted of high-intensity eccentric contractions of the elbow flexors. Resistance was reduced as subjects fatigued, until they reached exhaustion. Muscle soreness rating was determined using a visual analog scale. Serum creatine kinase levels were analyzed using a blood sample. Force deficits were determined by measures of maximal voluntary isometric contraction at $90^{\circ}$ of elbow flexion on a Orthotron II dynamometer. Muscle soreness rating, serum creatine kinase levels and maximal voluntary isometric contraction were determined at the before exercise and again at 24 and 48 hours postexericse. Treatments were applied immediately following exercise. The control group subjects rested following their exercise bout. Statistical analysis showed significant increases in muscle soreness rating and significant decreases in maximal voluntary isometric contraction when the before exercise was compared with 24 and 48 hour measures(p<0.01). No significant effects were observed between groups in muscle soreness rating and maximal voluntary isometric contraction(p>0.05). Highly significants differences in serum creatine kinase levels were found using on Analysis of variance(ANOVA) repeated measures between groups for each time cycles(p<0.001). This modality may have benefits when used early stage in the muscle damage.
Kim, Hyun-Jin;Kim, Su-Hyun;Park, Young-Hyun;Oh, Seok;Choi, Ji-Ho;Kim, Tae-Youl
Journal of the Korean Academy of Clinical Electrophysiology
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v.8
no.1
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pp.23-29
/
2010
Purpose : This study is to offer clinical primary data that examines the change of imaging structure and the quantitative evaluation of muscle activity on myofascial trigger points. This study examines neuromuscular physiological characteristic by comparing the differences in physical findings, pressure pain threshold, imaging, and electrophysiological characteristics in latent and active myofascial trigger points muscle and normal muscle through the following experimental procedures. Methods : The participants for the study were thirty-three adults in their twenties. We divided three groups into normal, latent and active myofascial trigger points groups by physical findings. We analyzed the results of measured pressure pain, threshold for pain, ultrasound imaging perform for structure characteristic of muscle, surface EMG according to type of muscle contraction for function of muscle contraction. Results : Significant differences were indicated in pressure pain threshold (p<0.05). Significant differences were discovered in the ultrasound imaging analysis. There were increases in muscle Echogenicity white area index (p<0.001). There were significant differences that decrease in %MVIC (p<0.05), increase in MDF (p<0.05). Conclusion : From these results, active rnyotascial trigger points muscle showed quality deterioration on ultrasound imaging and decreased function of muscle contraction, increased motor unit action potential of II type fiber, and electrophysiologically. Imaging structure and neuromuscular physiological characteristic can be diagnostic and quantitative analytical techniques for myofascial pain syndrome and a primary factor that reflected in physical therapy intervention.
Chronic or acute alcohol abuse often leads to liver injury associated with alcoholic hepatitis, liver fibrosis, cirrhosis, and liver cancer. In addition to the liver, alcohol abuse also induces a variety of other tissue injuries including pancreatitis, cardiomyopathy, neurotoxicity and muscle loss. Chronic skeletal muscle myopathy, independent of peripheral neuropathy, is well recognised in alcoholic patients. Several mechanisms may be involved in the pathogenesis of alcoholic myopathy. Ethanol is a potent inhibitor of muscle protein synthesis. Gastrocnemius and plantaris muscles are Type II fiber-predominant and usually considered representative of the musculature as a whole. Whereas, soleus muscle is Type I fiber predominant. Shihosogan-san is a traditional Korean medicine that is widely employed to treat indigestion and liver diseases. Muscle diseases are often related to liver diseases and conditions. We therefore tested the hypothesis that treatment with Shihosogan-san could ameliorate the ethanol-induced changes in muscle protein synthesis. Young male Sprague-Dawley rats were orally given 25% ethanol (5ml/kg, body weight) daily with Ethanol for 28 days. Normal group was similarly administrated with saline. In Shihosogan-san treated group, rats were orally administrated Shihosogan-san extract, and rats of EtOH group were given with the vehicle only. After 4 week, the morphology of gastrocnemius and plantaris muscles were assessed by hematoxylin and eosin staining. For comparative purposes, liver function was also investigated. The muscles from rats of EtOH group displayed a significant reduction in average cross section area compared to Normal group. Shihosogan-san treated group had increased fiber compared to the EtOH group. Moreover, Shihosogan-san treated group compared with EtOH group showed significantly decreased pro-apoptotic BAX expression and increased anti-apoptotic Bcl-2 expression. In conclusion, Shihosogan-san extract showed ameliorating effects on chronic alcohol toxicity in skeletal muscle.
Bae, Jun Hyun;Seo, Dae Yun;Lee, Sang Ho;Shin, Chaeyoung;Jamrasi, Parivash;Han, Jin;Song, Wook
The Korean Journal of Physiology and Pharmacology
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v.25
no.6
/
pp.585-592
/
2021
Cisplatin has been reported to cause side effects such as muscle wasting in humans and rodents. The physiological mechanisms involved in preventing muscle wasting, such as the regulation of AKT, PGC1-α, and autophagy-related factor FOXO3a by MuRF 1 and Atrogin-1, remain unclear following different types of exercise and in various skeletal muscle types. Eight-week-old male Wistar rats (n = 34) were assigned to one of four groups: control (CON, n = 6), cisplatin injection (1 mg/kg) without exercise (CC, n = 8), cisplatin (1 mg/kg) + resistance exercise (CRE, n = 9) group, and cisplatin (1 mg/kg) + aerobic exercise (CAE, n = 11). The CRE group performed progressive ladder exercise (starting with 10% of body weight on a 1-m ladder with 2-cm-interval grids, at 85°) for 8 weeks. The CAE group exercised by treadmill running (20 m/min for 60 min daily, 4 times/week) for 8 weeks. Compared with the CC group, the levels of the autophagy-related factors BNIP3, Beclin 1, LC3-II/I ratio, p62, and FOXO3a in the gastrocnemius and soleus muscles were significantly decreased in the CRE and CAE groups. The CRE and CAE groups further showed significantly decreased MuRF 1 and Atrogin-1 levels and increased phosphorylation of AKT, FOXO3a, and PGC1-α. These results suggest that both ladder and aerobic exercise directly affected muscle wasting by modulating the AKT/PGC1-α/FOXO3a signaling pathways regardless of the skeletal muscle type.
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