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Journal of Physiological Sciences: JPS

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https://www.readbyqxmd.com/read/29344913/cardiac-basal-autophagic-activity-and-increased-exercise-capacity
#1
Fang-Hui Li, Tao Li, Ying-Min Su, Jing-Yi Ai, Rui Duan, Timon Cheng-Yi Liu
To investigate whether high-intensity interval training (HIIT) and continuous moderate-intensity training (CMT) have different impacts on exercise performance and cardiac function and to determine the influence of these exercise protocols on modulating basal autophagy in the cardiac muscle of rats. Rats were assigned to three groups: sedentary control (SC), CMT, and HIIT. Total exercise volume and mean intensity were matched between the two protocols. After a 10-week training program, rats were evaluated for exercise performance, including exercise tolerance and grip strength...
January 17, 2018: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29332212/measurement-of-cl-i-unaffected-by-the-cell-volume-change-using-mqae-based-two-photon-microscopy-in-airway-ciliary-cells-of-mice
#2
Yukiko Ikeuchi, Haruka Kogiso, Shigekuni Hosogi, Saori Tanaka, Chikao Shimamoto, Toshio Inui, Takashi Nakahari, Yoshinori Marunaka
MQAE is a 'non-ratiometric' chloride ion (Cl-)-quenched fluorescent indicator that is used to determine intracellular Cl- concentration ([Cl-]i). MQAE-based two-photon microscopy is reported to be a useful method to measure [Cl-]i, but it is still controversial because a change in cell volume may alter the MQAE concentration, leading to a change in the fluorescence intensity without any change in [Cl-]i. In an attempt to elucidate the effect or lack of effect of cell volume on MQAE concentration, we studied the effects of changes in cell volume, achieved by applying different levels of osmotic stress, on the intensity of MQAE fluorescence in airway ciliary cells...
January 13, 2018: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29332211/testosterone-mediated-upregulation-of-delayed-rectifier-potassium-channel-in-cardiomyocytes-causes-abbreviation-of-qt-intervals-in-rats
#3
Kimiko Masuda, Hiroki Takanari, Masaki Morishima, FangFang Ma, Yan Wang, Naohiko Takahashi, Katsushige Ono
Men have shorter rate-corrected QT intervals (QTc) than women, especially at the period of adolescence or later. The aim of this study was to elucidate the long-term effects of testosterone on cardiac excitability parameters including electrocardiogram (ECG) and potassium channel current. Testosterone shortened QT intervals in ECG in castrated male rats, not immediately after, but on day 2 or later. Expression of Kv7.1 (KCNQ1) mRNA was significantly upregulated by testosterone in cardiomyocytes of male and female rats...
January 13, 2018: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29305789/correction-to-effects-of-exergaming-on-cardiovascular-risk-factors-and-adipokine-levels-in-women
#4
Maria Guadalupe Soares Amorim, Maurício Dias de Oliveira, Daiane Santos Soares, Leandro da Silva Borges, Alexandre Dermargos, Elaine Hatanaka
The original article was corrected.
January 5, 2018: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29285709/effects-of-dried-tofu-supplementation-during-interval-walking-training-on-the-methylation-of-the-nfkb2-gene-in-the-whole-blood-of-older-women
#5
Mayuko Morikawa, Sakura Nakano, Nobuo Mitsui, Hisashi Murasawa, Shizue Masuki, Hiroshi Nose
Muscle atrophy with aging is closely associated with chronic systemic inflammation and lifestyle-related diseases. Here, we assessed whether dried tofu intake during 5-month interval walking training (IWT) enhanced increases in thigh muscle mass and strength and ameliorated susceptibility to inflammation in older women. Subjects (n = 32, ~ 65 years) who performed IWT for > 6 months participated in this study. They were randomly divided into 2 groups: IWT + placebo intake (PLG, n = 16; 108 kcal, 0...
December 29, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29273887/post-myocardial-infarction-exercise-training-beneficially-regulates-thyroid-hormone-receptor-isoforms
#6
Xiaohua Xu, Wenhan Wan, Michael A Garza, John Q Zhang
Thyroid hormone receptors (TRs) play a critical role in the expression of genes that are major determinants of myocardial contractility, including α-myosin heavy chain (α-MHC) and β-MHC. After myocardial infarction (MI), changes in myocardial TRs consistently correlate with changes in thyroid hormone (TH) target gene transcription, and this is thought to play a key role in the progression to end-stage heart failure. Interestingly, post-MI exercise training has been shown to beneficially alter TH-target gene transcription and preserve cardiac function without changing serum TH...
December 22, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29270856/lumped-parameter-model-for-hemodynamic-simulation-of-congenital-heart-diseases
#7
REVIEW
Shuji Shimizu, Dai Une, Toru Kawada, Yohsuke Hayama, Atsunori Kamiya, Toshiaki Shishido, Masaru Sugimachi
The recent development of computer technology has made it possible to simulate the hemodynamics of congenital heart diseases on a desktop computer. However, multi-scale modeling of the cardiovascular system based on computed tomographic and magnetic resonance images still requires long simulation times. The lumped parameter model is potentially beneficial for real-time bedside simulation of congenital heart diseases. In this review, we introduce the basics of the lumped parameter model (time-varying elastance chamber model combined with modified Windkessel vasculature model) and illustrate its usage in hemodynamic simulation of congenital heart diseases using examples such as hypoplastic left heart syndrome and Fontan circulation...
December 21, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29260454/neuroprotective-effect-of-treadmill-exercise-possibly-via-regulation-of-lysosomal-degradation-molecules-in-mice-with-pharmacologically-induced-parkinson-s-disease
#8
Dong-Joo Hwang, Jung-Hoon Koo, Ki-Cheon Kwon, Dong-Hoon Choi, Sung-Deuk Shin, Jae-Hoon Jeong, Hyun-Seob Um, Joon-Yong Cho
Dysfunction of mitophagy, which is a selective degradation of defective mitochondria for quality control, is known to be implicated in the pathogenesis of Parkinson's disease (PD). However, how treadmill exercise (TE) regulates mitophagy-related molecules in PD remains to be elucidated. Therefore, we aimed to investigate how TE regulates α-synuclein (α-syn)-induced neurotoxicity and mitophagy-related molecules in the nigro-striatal region of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-mice. Our data showed that TE exhibited a significant restoration of tyrosine hydroxylase and motor coordination with suppression of α-syn expression, hallmarks of PD, possibly via up-regulation of lysosomal degradation molecules, LAMP-2 and cathepsin L, with down-regulation of p62, LC3-II/LC3-I ratio, PINK1 and parkin in the substantia nigra of MPTP mice...
December 19, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29230719/resveratrol-and-or-exercise-training-counteract-aging-associated-decline-of-physical-endurance-in-aged-mice-targeting-mitochondrial-biogenesis-and-function
#9
Marwa Hassan Muhammad, Mona Maher Allam
Mitochondrial dysfunction and decreased mitochondrial content are hallmarks of aging that leads to decreased physical endurance. Our aim was to explore the anti-aging effect of resveratrol (RSVT) supplementation, a polyphenol, and/or exercise training, started at an older age, on improving physical activity, therefore, help in frailty avoidance and promotion of healthy aging in elderly. Eighteen-month-old aged mice received RSVT (15 mg/kg/day) and/or exercise trained for 4 weeks showed significant longer time to exhaustion with decreased blood lactate and free fatty acids levels associated with improved oxidative stress evidenced by decreased gastrocnemius muscle lipid peroxidation and increased antioxidant enzymes activities, catalase and superoxide dismutase, when compared to aged mice control group...
December 11, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29222739/effects-of-two-aerobic-exercise-training-protocols-on-parameters-of-oxidative-stress-in-the-blood-and-liver-of-obese-rats
#10
Daniela Delwing-de Lima, Ariene Sampaio Souza Farias Ulbricht, Carla Werlang-Coelho, Débora Delwing-Dal Magro, Victor Hugo Antonio Joaquim, Eloise Mariani Salamaia, Silvana Rodrigues de Quevedo, Larissa Desordi
We evaluated the effects of moderate-intensity continuous training (MICT) and high-intensity interval training (HIIT) protocols on the alterations in oxidative stress parameters caused by a high-fat diet (HFD), in the blood and liver of rats. The HFD enhanced thiobarbituric acid reactive substances (TBA-RS) and protein carbonyl content, while reducing total sulfhydryl content and catalase (CAT) and glutathione peroxidase (GSH-Px) activities in the blood. Both training protocols prevented an increase in TBA-RS and protein carbonyl content, and prevented a reduction in CAT...
December 8, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29209891/renal-response-to-anaphylaxis-in-anesthetized-rats-and-isolated-perfused-rat-kidneys-roles-of-nitric-oxide
#11
Kiyotaka Mukai, Yuhichi Kuda, Toshishige Shibamoto, Mamoru Tanida, Yasutaka Kurata, Hitoshi Yokoyama
We determined the renal responses to anaphylaxis and the effects of a nitric oxide synthesis inhibitor, L-NAME, in anesthetized rats and isolated perfused rat kidneys. After the ovalbumin antigen injection, the sensitized rats showed transient and substantial decreases in mean blood pressure and renal blood flow and an increase in renal vascular resistance. Creatinine clearance, a measure of renal function, decreased to 53% baseline at 2 h after antigen. L-NAME pretreatment significantly enhanced the antigen-induced renal vasoconstriction and renal dysfunction...
December 5, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29189992/effects-of-exergaming-on-cardiovascular-risk-factors-and-adipokine-levels-in-women
#12
Maria Guadalupe Soares Amorim, Maurício Dias de Oliveira, Daiane Santos Soares, Leandro da Silva Borges, Alexandre Dermargos, Elaine Hatanaka
The aim of this study was to examine the effects of exergaming on the cardiovascular risk factors and adipokine levels of women engaged in the music video game Just Dance using the Xbox 360 Kinect console. Triglycerides, total cholesterol, HDL, LDL, FFA, CRP, TNF-α, Il-1β, IL-6, leptin, and resistin were measured in sedentary women before and 1 month after the practice of exergaming. We also evaluated anthropometric parameters. Our results indicate that total serum cholesterol, triglycerides, and LDL were reduced by 64, 29, and 12%, respectively...
November 30, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29181704/correction-to-protein-phosphatases-1-and-2a-and-their-naturally-occurring-inhibitors-current-topics-in-smooth-muscle-physiology-and-chemical-biology
#13
Akira Takai, Masumi Eto, Katsuya Hirano, Kosuke Takeya, Toshiyuki Wakimoto, Masaru Watanabe
The article Protein phosphatases 1 and 2A and their naturally occurring inhibitors: current topics in smooth muscle physiology and chemical biology, written by Akira Takai, Masumi Eto, Katsuya Hirano, Kosuke Takeya, Toshiyuki Wakimoto and Masaru Watanabe, was originally published electronically on the publisher's internet portal (currently SpringerLink) on 5th July 2017 without open access.
November 27, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29164389/early-life-stress-induces-motor-coordination-dysfunction-in-adult-mice
#14
Michifumi Kokubo, Syutaro Toya, Izuki Amano, Yusuke Takatsuru
Although child abuse has become a serious social problem in most countries, the neural mechanisms by which it induces adulthood mental disorders is not yet fully understood. Mice exposed to early-life stresses, such as maternal deprivation (MD) during lactation, are a good model for studying the effects of neglect of humans in early life. Early-life stress induces structural/functional changes of neurons in the hippocampus, prefrontal cortex, and amygdala, and causes mental disorders in adulthood. In this study, we found motor coordination dysfunction in male MD mice...
November 21, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29164388/correction-to-physiological-insights-of-recent-clinical-diagnostic-and-therapeutic-technologies-for-cardiovascular-diseases
#15
Kenji Shigemi, Soichiro Fuke, Dai Une, Keita Saku, Shuji Shimizu, Toru Kawada, Toshiaki Shishido, Kenji Sunagawa, Masaru Sugimachi
The article Physiological insights of recent clinical diagnostic and therapeutic technologies for cardiovascular diseases, written by Kenji Shigemi, Soichiro Fuke, Dai Une, Keita Saku, Shuji Shimizu, Toru Kawada, Toshiaki Shishido, Kenji Sunagawa and Masaru Sugimachi, was originally published Online First without open access.
November 21, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29134575/impact-of-intramuscular-administration-of-lipid-soluble-and-water-soluble-vehicles-into-regenerating-muscle-at-the-distinct-phases-of-skeletal-muscle-regeneration
#16
Ratchakrit Srikuea, Kanokwan Suhatcho
Interpretation on the effectiveness of potential substances to enhance skeletal muscle regeneration is difficult if an inappropriate vehicle is administered, since vehicle administration can directly enhance or suppress regenerative capacity. In the current study, intramuscular administration of lipid-soluble and water-soluble vehicles into regenerating muscle at the distinct phases of skeletal muscle regeneration (regenerative vs. remodeling) were investigated. Tested vehicles included lipid-soluble [olive oil, (0...
November 13, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/29134574/correction-to-potential-signaling-pathways-of-acute-endurance-exercise-induced-cardiac-autophagy-and-mitophagy-and-its-possible-role-in-cardioprotection
#17
Youngil Lee, Insu Kwon, Yongchul Jang, Wankeun Song, Ludmila M Cosio-Lima, Mark H Roltsch
The article Potential signaling pathways of acute endurance exercise-induced cardiac autophagy and mitophagy and its possible role in cardioprotection, written by Youngil Lee.
November 13, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28836167/attenuation-of-ductus-arteriosus-intimal-thickening-in-preterm-sheep-twins-compared-with-singletons
#18
Satoko Ito, Utako Yokoyama, Junichi Saito, Shinichi Sato, Haruo Usuda, Shimpei Watanabe, Ryuta Kitanishi, Yuichiro Miura, Masatoshi Saito, Takushi Hanita, Tadashi Matsuda, Yoshihiro Ishikawa
Preterm twins have a higher morbidity rate of patent ductus arteriosus (PDA) than do singletons. However, the effect of multiple births on maturation of the ductus arteriosus (DA) has not been reported. Because intimal thickening (IT) is required for DA anatomical closure, we examined IT development in the DA of preterm twins and singletons. Sheep DA tissues obtained from preterm fetuses were subjected to elastica van Gieson staining to evaluate IT. The total IT score in each DA was the sum of the IT scores obtained from six evenly divided parts of the DA, which was positively correlated with gestational ages in singletons...
November 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28681363/physiological-insights-of-recent-clinical-diagnostic-and-therapeutic-technologies-for-cardiovascular-diseases
#19
REVIEW
Kenji Shigemi, Soichiro Fuke, Dai Une, Keita Saku, Shuji Shimizu, Toru Kawada, Toshiaki Shishido, Kenji Sunagawa, Masaru Sugimachi
Diagnostic and therapeutic methods for cardiovascular diseases continue to be developed in the 21st century. Clinicians should consider the physiological characteristics of the cardiovascular system to ensure successful diagnosis and treatment. In this review, we focus on the roles of cardiovascular physiology in recent diagnostic and therapeutic technologies for cardiovascular diseases. In the first section, we discuss how to evaluate and utilize left ventricular arterial coupling in the clinical settings...
November 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27744641/somatosensory-regulation-of-serotonin-release-in-the-central-nucleus-of-the-amygdala-is-mediated-via-corticotropin-releasing-factor-and-gamma-aminobutyric-acid-in-the-dorsal-raphe-nucleus
#20
Ryota Tokunaga, Rie Shimoju, Hideshi Shibata, Mieko Kurosawa
Noxious cutaneous stimulation increases, whereas innocuous cutaneous stimulation decreases serotonin (5-HT) release in the central nucleus of the amygdala (CeA) in anesthetized rats. In the present study, we investigated the contribution of corticotropin releasing factor (CRF) receptors and gamma-aminobutyric acid (GABA) receptors in the dorsal raphe nucleus (DRN) to those responses. Release of 5-HT in the CeA was monitored by microdialysis before and after 10-min stimulation by pinching or stroking. Increased 5-HT release in the CeA in response to pinching was abolished by CRF2 receptor antagonism in the DRN...
November 2017: Journal of Physiological Sciences: JPS
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