journal
MENU ▼
Read by QxMD icon Read
search

Journal of Physiological Sciences: JPS

journal
https://www.readbyqxmd.com/read/28083734/effects-of-beta-hydroxy-beta-methylbutyrate-hmb-on-the-expression-of-ubiquitin-ligases-protein-synthesis-pathways-and-contractile-function-in-extensor-digitorum-longus-edl-of-fed-and-fasting-rats
#1
Frederico Gerlinger-Romero, Lucas Guimarães-Ferreira, Caio Yogi Yonamine, Rafael Barrera Salgueiro, Maria Tereza Nunes
Beta-hydroxy-beta-methylbutyrate (HMB), a leucine metabolite, enhances the gain of skeletal muscle mass by increasing protein synthesis or attenuating protein degradation or both. The aims of this study were to investigate the effect of HMB on molecular factors controlling skeletal muscle protein synthesis and degradation, as well as muscle contractile function, in fed and fasted conditions. Wistar rats were supplied daily with HMB (320 mg/kg body weight diluted in NaCl-0.9%) or vehicle only (control) by gavage for 28 days...
January 12, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28078626/time-course-investigation-of-blood-brain-barrier-permeability-and-tight-junction-protein-changes-in-a-rat-model-of-permanent-focal-ischemia
#2
Peng Liu, Rui Zhang, Danyang Liu, Jinling Wang, Chunling Yuan, Xuemei Zhao, Yinjie Li, Xuefei Ji, Tianyan Chi, Libo Zou
Permanent middle cerebral artery occlusion (pMCAO) is an animal model that is widely used to simulate human ischemic stroke. However, the timing of the changes in the expression of tight junction (TJ) proteins and synaptic proteins associated with pMCAO remain incompletely understood. Therefore, to further explore the characteristics and mechanisms of blood-brain barrier (BBB) damage during cerebral ischemic stroke, we used a pMCAO rat model to define dynamic changes in BBB permeability within 120 h after ischemia in order to examine the expression levels of the TJ proteins claudin-5 and occludin and the synaptic proteins synaptophysin (SYP) and postsynaptic density protein 95 (PSD95)...
January 11, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28070865/sphingosine-1-phosphate-pretreatment-amends-hypoxia-induced-metabolic-dysfunction-and-impairment-of-myogenic-potential-in-differentiating-c2c12-myoblasts-by-stimulating-viability-calcium-homeostasis-and-energy-generation
#3
Babita Rahar, Sonam Chawla, Sanjay Pandey, Anant Narayan Bhatt, Shweta Saxena
Sphingosine-1-phosphate (S1P) has a role in transpiration in patho-physiological signaling in skeletal muscles. The present study evaluated the pre-conditioning efficacy of S1P in facilitating differentiation of C2C12 myoblasts under a normoxic/hypoxic cell culture environment. Under normoxia, exogenous S1P significantly promoted C2C12 differentiation as evident from morphometric descriptors and differentiation markers of the mature myotubes, but it could facilitate only partial recovery from hypoxia-induced compromised differentiation...
January 9, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28054308/inhibition-of-ghrelin-induced-feeding-in-rats-by-pretreatment-with-a-novel-dual-orexin-receptor-antagonist
#4
Mariko So, Hirofumi Hashimoto, Reiko Saito, Yukiyo Yamamoto, Yasuhito Motojima, Hiromichi Ueno, Satomi Sonoda, Mitsuhiro Yoshimura, Takashi Maruyama, Koichi Kusuhara, Yoichi Ueta
Orexin-A and -B, and ghrelin are potent orexigenic peptides. The effects of ACT462206, a novel dual orexin receptor antagonist (DORA), on ghrelin-induced feeding were examined in adult male Wistar rats. Hyperphagia induced by the intracerebroventricular (icv) administration of ghrelin was significantly suppressed for at least 2 h by pretreatment with icv administration of DORA. A marked increase was observed in the number of neurons showing Fos immunoreactivity in the paraventricular nucleus, arcuate nucleus and lateral hypothalamic area (LHA), 90 min after icv administration of ghrelin...
January 4, 2017: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28035645/reflex-arc-of-the-teeth-clenching-induced-pressor-response-in-rats
#5
Ichiro Shoji, Takehito Kemuriyama, Megumi Tandai-Hiruma, Satoshi Maruyama, Akimasa Tashiro, Hidetaka Yokoe, Yasuhiro Nishida
Although "teeth clenching" induces pressor response, the reflex tracts of the response are unknown. In this study, dantrolene administration inhibited teeth clenching generated by electrical stimulation of the masseter muscles and completely abolished the pressor response. In addition, trigeminal ganglion block or hexamethonium administration completely abolished the pressor response. Local anesthesia of molar regions significantly reduced the pressor response to 27 ± 10%. Gadolinium (mechanoreceptor blocker of group III muscle afferents) entrapment in masticatory muscles also significantly reduced the pressor response to 62 ± 7%...
December 29, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28028653/quantification-of-radial-arterial-pulse-characteristics-change-during-exercise-and-recovery
#6
Anran Wang, Lin Yang, Weimin Wen, Song Zhang, Dongmei Hao, Syed G Khalid, Dingchang Zheng
It is physiologically important to understand the arterial pulse waveform characteristics change during exercise and recovery. However, there is a lack of a comprehensive investigation. This study aimed to provide scientific evidence on the arterial pulse characteristics change during exercise and recovery. Sixty-five healthy subjects were studied. The exercise loads were gradually increased from 0 to 125 W for female subjects and to 150 W for male subjects. Radial pulses were digitally recorded during exercise and 4-min recovery...
December 27, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28004337/erratum-to-the-effect-of-resveratrol-on-angiotensin-ii-levels-and-the-rate-of-transcription-of-its-receptors-in-the-rat-cardiac-hypertrophy-model
#7
Fahimeh Dorri Mashhadi, Javad Zavvar Reza, Mohabbat Jamhiri, Zeinab Hafizi, Fatemeh Zare Mehrjardi, Fatemeh Safari
No abstract text is available yet for this article.
December 21, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28000176/pathology-and-molecular-mechanisms-of-coarctation-of-the-aorta-and-its-association-with-the-ductus-arteriosus
#8
REVIEW
Utako Yokoyama, Yasuhiro Ichikawa, Susumu Minamisawa, Yoshihiro Ishikawa
Coarctation of the aorta (CoA) is defined as a congenital stenosis of the thoracic aorta and is one of the most common congenital cardiovascular diseases. Despite successful surgical treatment for CoA, arterial abnormalities, including refractory hypertension, aortic aneurysm, and proatherogenic phenotypic changes, frequently affect patients' quality of life. Emerging evidence from morphological and molecular biological investigations suggest that the area of CoA is characterized by phenotypic modulation of smooth muscle cells, intimal thickening, and impaired elastic fiber formation...
December 20, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/28000175/adaptation-to-microgravity-deconditioning-and-countermeasures
#9
REVIEW
Kunihiko Tanaka, Naoki Nishimura, Yasuaki Kawai
Humans are generally in standing or sitting positions on Earth during the day. The musculoskeletal system supports these positions and also allows motion. Gravity acting in the longitudinal direction of the body generates a hydrostatic pressure difference and induces footward fluid shift. The vestibular system senses the gravity of the body and reflexively controls the organs. During spaceflight or exposure to microgravity, the load on the musculoskeletal system and hydrostatic pressure difference is diminished...
December 20, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27995459/epac-activation-inhibits-il-6-induced-cardiac-myocyte-dysfunction
#10
Huiling Jin, Takayuki Fujita, Meihua Jin, Reiko Kurotani, Yuko Hidaka, Wenqian Cai, Kenji Suita, Rajesh Prajapati, Chen Liang, Yoshiki Ohnuki, Yasumasa Mototani, Masanari Umemura, Utako Yokoyama, Motohiko Sato, Satoshi Okumura, Yoshihiro Ishikawa
Pro-inflammatory cytokines are released in septic shock and impair cardiac function via the Jak-STAT pathway. It is well known that sympathetic and thus catecholamine signaling is activated thereafter to compensate for cardiac dysfunction. The mechanism of such compensation by catecholamine signaling has been traditionally understood to be cyclic AMP-dependent protein kinase (PKA)-mediated enforcement of cardiac contractility. We hypothesized that the exchange protein activated by cAMP (Epac), a newly identified target of cAMP signaling that functions independently of PKA, also plays a key role in this mechanism...
December 19, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27987117/differential-effects-of-type-2-diabetes-on-brain-glycometabolism-in-rats-focus-on-glycogen-and-monocarboxylate-transporter-2
#11
Takeru Shima, Subrina Jesmin, Takashi Matsui, Mariko Soya, Hideaki Soya
Astrocyte-neuron lactate shuttle (ANLS) is a pathway that supplies glycogen-derived lactate to active neurons via monocarboxylate transporter 2 (MCT2), and is important for maintaining brain functions. Our study revealed alterations of ANLS with hippocampal hyper-glycogen levels and downregulated MCT2 protein levels underlying hippocampal dysfunctions as a complication in type 2 diabetic (T2DM) animals. Since T2DM rats exhibit brain dysfunctions involving several brain regions, we examined whether there might also be T2DM effects on ANLS's disturbances in other brain loci...
December 16, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27942993/diadenosine-pentaphosphate-affects-electrical-activity-in-guinea-pig-atrium-via-activation-of-potassium-acetylcholine-dependent-inward-rectifier
#12
Denis V Abramochkin, Viktoria M Karimova, Tatiana S Filatova, Andre Kamkin
Diadenosine pentaphosphate (Ap5A) belongs to the family of diadenosine polyphosphates, endogenously produced compounds that affect vascular tone and cardiac performance when released from platelets. The previous findings indicate that Ap5A shortens action potentials (APs) in rat myocardium via activation of purine P2 receptors. The present study demonstrates alternative mechanism of Ap5A electrophysiological effects found in guinea pig myocardium. Ap5A (10(-4) M) shortens APs in guinea pig working atrial myocardium and slows down pacemaker activity in the sinoatrial node...
December 10, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27928720/cardioprotection-of-exercise-preconditioning-involving-heat-shock-protein-70-and-concurrent-autophagy-a-potential-chaperone-assisted-selective-macroautophagy-effect
#13
Yang Yuan, Shan-Shan Pan, Yu-Jun Shen
It has been confirmed that exercise preconditioning (EP) has a protective effect on acute cardiovascular stress. However, how Hsp70 participates in EP-induced cardioprotection is unknown. EP may involve Hsp70 to repair unfolded proteins or may also stabilize the function of the endoplasmic reticulum via Hsp70-related autophagy to work on a protective formation. Our EP protocol involves four periods of 10 min running with 10 min recovery intervals. We added a period of exhaustive running to test this protective effect, using histology and molecular biotechnology methods to detect related markers...
December 7, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27913948/branched-chain-amino-acids-administration-suppresses-endurance-exercise-related-activation-of-ubiquitin-proteasome-signaling-in-trained-human-skeletal-muscle
#14
Evgeny A Lysenko, Tatiana F Vepkhvadze, Egor M Lednev, Olga L Vinogradova, Daniil V Popov
We tested whether post exercise ingestion of branched-chain amino acids (BCAA < 10 g) is sufficient to activate signaling associated with muscle protein synthesis and suppress exercise-induced activation of mechanisms associated with proteolysis in endurance-trained human skeletal muscle. Nine endurance-trained athletes performed a cycling bout with and without BCAA ingestion (0.1 g/kg). Post exercise ACC(Ser79/222) phosphorylation (endogenous marker of AMPK activity) was increased (~3-fold, P < 0...
December 3, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27909891/canola-oil-rich-in-oleic-acid-improves-diastolic-heart-function-in-diet-induced-obese-rats
#15
Sijo Joseph Thandapilly, Pema Raj, Xavier Lieben Louis, Danielle Perera, Prasanga Yamanagedara, Peter Zahradka, Carla G Taylor, Thomas Netticadan
Obesity is a leading cause of cardiovascular disease. It directly affects heart structure and function and contributes to heart failure. Diet is a major factor involved in the development of obesity along with genetic factors. We examined the effects of monounsaturated and polyunsaturated fatty acid-rich oils on cardiac structure and function in the diet-induced rodent model of obesity (DIO). Obese prone (OP) rats were fed a high-fat diet (HF; 55% of kcal) for 12 weeks; Sprague-Dawley rats fed commercial chow served as control...
December 1, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27896597/noradrenergic-inhibition-of-spinal-hyperexcitation-elicited-by-cutaneous-cold-stimuli-in-rats-with-oxaliplatin-induced-allodynia-electrophysiological-and-behavioral-assessments
#16
Seunghwan Choi, Akihiro Yamada, Woojin Kim, Sun Kwang Kim, Hidemasa Furue
We investigated the spinal action of noradrenaline on cold-elicited hyperexcitation detected in dorsal horn neurons of rats with allodynia induced by an oxaliplatin (6 mg/kg, i.p.) injection. In vivo extracellular recordings from the spinal dorsal horn showed that wide dynamic range neurons responded to cutaneous acetone (10 μl) stimulation in normal rats, and cold-elicited firings in oxaliplatin-administered rats were increased with a longer duration, correlated with behavioral responses. These responses were significantly attenuated by spinal administration (50 μM) of noradrenaline or its agonists, clonidine (α2), phenylephrine (α1) and isoprenaline (β), in descending order of efficacy...
November 28, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27873157/eicosapentaenoic-acid-triggers-ca-2-release-and-ca-2-influx-in-mouse-cerebral-cortex-endothelial-bend-3-cells
#17
King-Chuen Wu, Kar-Lok Wong, Mei-Ling Wang, Lian-Ru Shiao, Iat-Lon Leong, Chi-Li Gong, Ka-Shun Cheng, Paul Chan, Yuk-Man Leung
Eicosapentaenoic acid (EPA), an omega-3 fatty acid abundant in fish oil, protects endothelial cells (EC) from lipotoxicity and triggers EC NO release. The latter is related to an elevation of cytosolic Ca(2+). Although EPA has been shown to cause human EC cytosolic Ca(2+) elevation, the mechanism is unclear. Microfluorimetric imaging was used here to measure free cytosolic Ca(2+) concentration. EPA was shown to cause intracellular Ca(2+) release in mouse cerebral cortex endothelial bEND.3 cells; interestingly, the EPA-sensitive intracellular Ca(2+) pool(s) appeared to encompass and was larger than the Ca(2+) pool mobilized by sarcoplasmic-endoplasmic reticulum Ca(2+)-ATPase inhibition by cyclopiazonic acid...
November 21, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27864684/network-mechanisms-of-hippocampal-laterality-place-coding-and-goal-directed-navigation
#18
REVIEW
Takuma Kitanishi, Hiroshi T Ito, Yuichiro Hayashi, Yoshiaki Shinohara, Kenji Mizuseki, Takatoshi Hikida
The hippocampus and associated structures are responsible for episodic memory in humans. In rodents, the most prominent behavioral correlate of hippocampal neural activity is place coding, which is thought to underlie spatial navigation. While episodic memory is considered to be unique to humans in a restricted context, it has been proposed that the same neural circuitry and algorithms that enable spatial coding and navigation also support episodic memory. Here we review the recent progress in neural circuit mechanisms of hippocampal activity by introducing several topics: (1) cooperation and specialization of the bilateral hippocampi, (2) the role of synaptic plasticity in gamma phase-locking of spikes and place cell formation, (3) impaired goal-related activity and oscillations in a mouse model of mental disorders, and (4) a prefrontal-thalamo-hippocampal circuit for goal-directed spatial navigation...
November 18, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27838886/altered-uterine-contractility-in-response-to-%C3%AE-adrenoceptor-agonists-in-ovarian-cancer
#19
Beata Modzelewska, Maciej Jóźwik, Marcin Jóźwik, Stanisław Sulkowski, Anna Pędzińska-Betiuk, Tomasz Kleszczewski, Anna Kostrzewska
We aimed to prospectively examine β-adrenoceptor-mediated uterine contractility in women suffering from gynecological malignancies. Myometrial specimens were obtained from non-pregnant women undergoing hysterectomy for benign gynecological disorders, and ovarian, endometrial, synchronous ovarian-endometrial, and cervical cancer. Contractions of myometrial strips in an organ bath before and after cumulative dosages of β2- and β3-adrenoceptor agonists with preincubation of propranolol, SR 59230A, and butoxamine were studied...
November 12, 2016: Journal of Physiological Sciences: JPS
https://www.readbyqxmd.com/read/27826897/interactions-between-%C3%AE-adrenergic-vasodilation-and-cervical-sympathetic-nerves-are-mediated-by-%C3%AE-2-adrenoceptors-in-the-rat-masseter-muscle
#20
Hisayoshi Ishii, Toshiya Sato
Neural and humoral autonomic mechanisms may be important in the maintenance of blood flow in the masseter muscle (MBF). However, their interactions remain unclear. In this study, we examined interactions between neural and humoral regulation of MBF and investigated the mechanisms mediating these interactions in urethane-anesthetized rats. Stimulation of the adrenal nerve (AN) projecting to the adrenal medulla increased MBF, and this increase was mediated by β-adrenoceptors. Sectioning of the superior cervical sympathetic trunk (CST) significantly inhibited increases in MBF induced by AN stimulation during high activity in the CST, but not during low activity...
November 8, 2016: Journal of Physiological Sciences: JPS
journal
journal
41228
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"