journal
MENU ▼
Read by QxMD icon Read
search

Peptides

journal
https://www.readbyqxmd.com/read/28917652/tilapia-adropin-the-localization-and-regulation-of-growth-hormone-gene-expression-in-pituitary-cells
#1
JianPeng Peng, Ping Yang, Qianli Zhang, Quan Jiang
The peptide hormone adropin, encoded by the energy homeostasis-associated (Enho) gene, plays a role in energy homeostasis and the control of vascular function. The aim of this study was to examine the role of adropin in growth hormone (GH) gene expression at the pituitary level in tilapia. As a first step, the antiserum for the tilapia adropin was produced, and its specificity was confirmed by antiserum preabsorption and immunohistochemical staining in the tilapia pituitary. Adropin could be detected immunocytochemically in the proximal pars distalis (PPD) of the tilapia pituitary...
September 14, 2017: Peptides
https://www.readbyqxmd.com/read/28916197/invertebrate-neuropeptides-xvi
#2
EDITORIAL
Ronald J Nachman, Young Joon Kim
No abstract text is available yet for this article.
September 12, 2017: Peptides
https://www.readbyqxmd.com/read/28899838/design-and-evaluation-of-novel-natriuretic-peptide-derivatives-with-improved-pharmacokinetic-and-pharmacodynamic-properties
#3
Naomi Morozumi, Seiji Sato, Sayaka Yoshida, Yuriko Harada, Mayumi Furuya, Yoshiharu Minamitake, Kenji Kangawa
C-type natriuretic peptide (CNP) and its receptor, natriuretic peptide receptor B (NPR-B), are potent positive regulators of endochondral bone growth, making the CNP pathway one of the most promising therapeutic targets for the treatment of growth failure. However, the administration of exogenous CNP is not fully effective, due to its rapid clearance in vivo. Modification of CNP to potentially druggable derivatives may result in increased resistance to proteolytic degradation, longer plasma half-life (T1/2), and better distribution to target tissues...
September 9, 2017: Peptides
https://www.readbyqxmd.com/read/28893643/neuropeptide-discovery-in-proasellus-cavaticus-prediction-of-the-first-large-scale-peptidome-for-a-member-of-the-isopoda-using-a-publicly-accessible-transcriptome
#4
Andrew E Christie
In silico transcriptome mining is one of the most effective methods for neuropeptide discovery in crustaceans, particularly for species that are small, rare or from geographically inaccessible habitats that make obtaining the large pools of tissue needed for other peptide discovery platforms impractical. Via this approach, large peptidomes have recently been described for members of many of the higher crustacean taxa, one notable exception being the Isopoda; no peptidome has been predicted for any member of this malacostracan order...
September 8, 2017: Peptides
https://www.readbyqxmd.com/read/28889964/hypotensive-effect-induced-by-microinjection-of-alamandine-a-derivative-of-angiotensin-1-7-into-caudal-ventrolateral-medulla-of-2k1c-hypertensive-rats
#5
E R Soares, C M Barbosa, M J Campagnole-Santos, R A S Santos, A C Alzamora
In the present study we evaluated the cardiovascular effects produced by microinjection of the new component of the renin-angiotensin system, alamandine, into caudal ventrolateral medulla of urethane-anesthetized normotensive and hypertensive 2K1C rats. The participation of different angiotensin receptors in the effects of alamandine was also evaluated. Microinjection of angiotensin-(1-7) was used for comparison. The microinjection of 4, 40 and 140pmol of alamandine or angiotensin-(1-7) into caudal ventrolateral medulla induced similar hypotensive effects in Sham-operated rats...
September 8, 2017: Peptides
https://www.readbyqxmd.com/read/28870797/detailed-characterisation-of-stc-1-cells-and-the-pgip-neo-sub-clone-suggests-the-incretin-hormones-are-translationally-regulated
#6
Anna L Gillespie, Xiaobei Pan, Anna Marco-Ramell, Caroline Meharg, Brian D Green
STC-1 is a heterogeneous plurihormonal cell line producing several prominent gut peptide hormones. pGIP/Neo is a genetically selected sub-clone of STC-1 with augmented levels of glucose-dependent insulinotropic peptide (GIP). Morphometric parameters, hormone concentrations, mRNA transcripts, hormone immunocytochemistry and nutrient utilisation/production of these two cell lines were compared. Proglucagon-derived peptides (Glucagon-like peptide-1 (GLP-1) and - 2(GLP-2)) were lower in sub-clone cells than progenitor cells...
September 8, 2017: Peptides
https://www.readbyqxmd.com/read/28889965/losartan-counteracts-the-effects-of-cardiomyocyte-swelling-on-glucose-uptake-and-insulin-receptor-substrate-1-levels
#7
Yamil Gerena, Janice Griselle Lozada, Bryan Jael Collazo, Jarold Méndez-Álvarez, Jennifer Méndez-Estrada, Walmor C De Mello
A growing body of evidence demonstrates an association between Angiotensin II (Ang II) receptor blockers (ARBs) and enhanced glucose metabolism during ischemic heart disease. Despite these encouraging results, the mechanisms responsible for these effects during ischemia remain poorly understood. In this study we investigated the influence of losartan, an AT1 receptor blocker, and secreted Ang II (sAng II) on glucose uptake and insulin receptor substrate (IRS-1) levels during cardiomyocyte swelling. H9c2 cells were differentiated to cardiac muscle and the levels of myogenin, Myosin Light Chain (MLC), and membrane AT1 receptors were measured using flow cytometry...
September 7, 2017: Peptides
https://www.readbyqxmd.com/read/28888771/c-terminal-hydrazide-modification-changes-the-spinal-antinociceptive-profiles-of-endomorphins-in-mice
#8
Chang-Lin Wang, Dai-Jun Yang, Bi-Yu Yuan, Yu Wang
Previously, we have demonstrated that endomorphins (EMs) analogs with C-terminal hydrazide modification retained the μ-opioid receptor affinity and selectivity, and exhibited potent antinociception after intracerebroventricular (i.c.v.) administration. In the present study, we extended our studies to evaluate the antinociceptive profiles of EMs and their analogs EM-1-NHNH2, EM-2-NHNH2 given spinally in the radiant heat paw withdrawal test. Following intrathecal (i.t.) administration, EM-1, EM-2, EM-1-NHNH2 and EM-2-NHNH2 dose-dependently increased the latency for paw withdrawal response...
September 6, 2017: Peptides
https://www.readbyqxmd.com/read/28887047/peptides-from-frog-skin-with-potential-for-development-into-agents-for-type-2-diabetes-therapy
#9
J Michael Conlon, Milena Mechkarska, Yasser H Abdel-Wahab, Peter R Flatt
Several frog skin peptides, first identified as result of their antimicrobial or immunomodulatory activities, have subsequently been shown to stimulate insulin release both in vitro and in vivo and so show potential for development into incretin-based drugs for treatment of patients with Type 2 diabetes mellitus. However, their therapeutic potential as anti-diabetic agents is not confined to this activity as certain frog skin-derived peptides, such as magainin-AM2 and CPF-SE1 and analogs of hymenochirin-1B, tigerinin-1R, and esculentin-2CHa, have been shown to increase insulin sensitivity, promote β-cell proliferation, suppress pancreatic and circulating glucagon concentrations, improve the lipid profile, and selectively alter expression of genes involved in insulin secretion and action in mice with diet-induced obesity, insulin resistance and impaired glucose tolerance...
September 5, 2017: Peptides
https://www.readbyqxmd.com/read/28887046/effect-of-amino-acids-near-the-rgd-sequence-on-binding-activities-between-%C3%AE-iib%C3%AE-3-integrin-and-fibrinogen-in-the-presence-of-rgd-containing-synthetic-peptides-from-elegantin-and-angustatin
#10
Etsuko Oyama, Hidenobu Takahashi, Kazuyuki Ishii
Elegantin and angustatin, which were isolated from the snake venoms of Protobothrops elegans and Dendroaspis angusticeps, markedly inhibit binding between platelet integrins and fibrinogen via the Arg-Gly-Asp (RGD) sequence. Angustatin, which is a three-finger toxin containing the RGD sequence, inhibits platelet aggregation almost ten times more strongly than disintegrin isolated from the venoms of Viperidae and Crotalidae. The RGD sequences of both polypeptides are located at the top of hairpin loops, and the composition of the RGD loop is very important for binding to integrin...
September 5, 2017: Peptides
https://www.readbyqxmd.com/read/28882471/arginine-vasopressin-improves-the-memory-deficits-in-han-chinese-patients-with-first-episode-schizophrenia
#11
Cai-Hong Geng, Chao Wang, Jun Yang, Hua Wang, Rui-Qing Ma, Xu Liu, Chang-Hong Wang
The memory impairment is a core deficit in the first-episode schizophrenia patients. Arginine vasopressin (AVP) in the brain can improve learning and memory. We performed multicentre, randomized, double-blind, placebo-controlled, parallel-group clinical trial to study the cognitive functioning in Han Chinese first-episode schizophrenic patients in a 12-week treatment regime with the intranasal administration of AVP (128 cases) or placebo (131 cases) in addition to the conventional treatment. The methods of positive and negative syndrome scale (PANSS), Wechsler memory scale-4th edition (WMS-IV) and event-related potential (ERP) were used to study the effects of AVP on the cognitive function...
September 5, 2017: Peptides
https://www.readbyqxmd.com/read/28870798/pattern-of-mas-expression-in-acute-and-post-acute-stage-of-nerve-injury-in-mice
#12
Alex Dias Assis, Fernanda de Assis Araújo, Robson Augusto Souza Dos Santos, Silvia Passos Andrade, Renata Graciele Zanon
Angiotensin-(1-7) (Ang [1-7]) and its receptor Mas are involved in a number of physiological processes, including control of arterial pressure and modulation of nervous system actions. However, the involvement of the Ang-(1-7)/Mas axis in peripheral nerve injury has not been investigated. Using a model of sciatic nerve injury in mice, we demonstrated opposing changes in Mas receptor expression at days 2 and 14 post-injury. Mas receptor expression was more intense 2days after the nerve lesion, compared with the intensity of the intact nerve...
September 1, 2017: Peptides
https://www.readbyqxmd.com/read/28867075/isolation-of-new-ligands-for-orphan-receptor-mrgprx1-hemorphins-lvv-h7-and-vv-h7
#13
T Karhu, K Akiyama, O Vuolteenaho, U Bergmann, T Naito, K Tatemoto, K-H Herzig
The human MAS-related G protein-coupled receptor X1 (MRGPRX1) is a member of the GPCR family. The receptor is primate specific and expressed in the sensory neurons of dorsal root ganglion and trigeminal ganglion, where it is considered to be involved in the pain perception. The MRGPRX1 has unusual binding mechanism, as it is activated by several different ligands as well as several different fragments of precursor proteins. Thus, we hypothesize that it is activated by several unknown compounds as well since the receptor is still classified as orphan...
September 1, 2017: Peptides
https://www.readbyqxmd.com/read/28851568/angiotensin-at1-receptors-modulate-the-anxiogenic-effects-of-angiotensin-5-8-injected-into-the-rat-ventrolateral-periaqueductal-gray
#14
Karina Genaro, Débora Fabris, Helene A Fachim, Wiliam A Prado
Losartan and PD 123,319 are non-peptide angiotensin (Ang) receptor antagonists for the AT1 and AT2 subtypes of Ang II receptors, respectively. The tetrapeptide Ang (5-8) is the smallest Ang-peptide that elicits anxiogenic effects on unconditioned and conditioned experimental models upon injection into the ventrolateral column of the periaqueductal gray (vlPAG), and Ang (5-8) can be synthesized (from Ang II or Ang III) and inactivated in this mesencephalic structure. The vlPAG is also known to play a central role in mechanisms of fear and anxiety...
August 26, 2017: Peptides
https://www.readbyqxmd.com/read/28851567/association-of-down-regulation-of-calcitonin-gene-related-peptide-and-substance-p-with-increase-of-myocardial-vulnerability-in-diabetic-neuropathic-rats
#15
Tu-Ping Li, Zheng Guo, Chao-Jie Liu, Tao Sun, Lu Chen, Xin Zhao
Diabetic patients present high co-morbidities of neuropathy and severer consequences of coronary heart disease. But the pathological mechanism is still unclear. Here we investigated a potential association of diabetic impairment of sensory nerves with increase of vulnerability of myocardium in acute myocardial ischemia/reperfusion. A rat model of diabetes mellitus was induced by high fat and sugar diet plus a small dose of streptozotocin. Impairment of sensory nerves was evaluated by measurement of changes in tail flick latency to noxious thermal stimulation and calcitonin gene-related peptide (CGRP) and substance P (SP) in the dorsal root ganglia (DRG) and the myocardium of the heart were examined...
August 26, 2017: Peptides
https://www.readbyqxmd.com/read/28847490/apelin-attenuates-tgf-%C3%AE-1-induced-epithelial-to-mesenchymal-transition-via-activation-of-pkc-%C3%AE%C2%B5-in-human-renal-tubular-epithelial-cells
#16
Li-Yan Wang, Zong-Li Diao, Jun-Fang Zheng, Yi-Ru Wu, Qi-Dong Zhang, Wen-Hu Liu
Epithelial to mesenchymal transition (EMT), a process whereby fully differentiated epithelial cells transition to a mesenchymal phenotype, has been implicated in the pathogenesis of renal fibrosis. Apelin, a bioactive peptide, has recently been recognized to protect against renal profibrotic activity, but the underlying mechanism has not yet been elucidated. In this study, we investigated the regulation of EMT in the presence of apelin-13 in vitro. Expression of the mesenchymal marker alpha-smooth muscle actin (α-SMA) and the epithelial marker E-cadherin was examined by immunofluorescence and western blotting in transforming growth factor beta 1 (TGF-β1)-stimulated human proximal tubular epithelial cells...
August 25, 2017: Peptides
https://www.readbyqxmd.com/read/28844870/phoenixin-14-injected-intracerebroventricularly-but-not-intraperitoneally-stimulates-food-intake-in-rats
#17
Martha Schalla, Philip Prinz, Tiemo Friedrich, Sophie Scharner, Peter Kobelt, Miriam Goebel-Stengel, Matthias Rose, Andreas Stengel
Phoenixin, a recently discovered 20-amino acid peptide was implicated in reproduction. However, the expression in food intake-regulatory nuclei such as the paraventricular nucleus, the arcuate nucleus and the nucleus of the solitary tract suggests an implication of phoenixin in food intake regulation. Therefore, we investigated the effects of phoenixin-14, the shorter form of phoenixin, on food intake following intracerebroventricular (icv) and intraperitoneal (ip) injection in ad libitum fed male Sprague-Dawley rats...
August 24, 2017: Peptides
https://www.readbyqxmd.com/read/28838782/temporary-removal-rebirth-of-the-incretin-concept-its-conception-and-early-development
#18
Vincent Marks
No abstract text is available yet for this article.
August 22, 2017: Peptides
https://www.readbyqxmd.com/read/28807775/temporary-removal-the-potential-benefits-of-glucagon-like-peptide-1-receptor-agonists-for-diabetic-retinopathy
#19
Baoying Pang, Huanran Zhou, Hongyu Kuang
No abstract text is available yet for this article.
August 12, 2017: Peptides
https://www.readbyqxmd.com/read/28800948/comparative-effects-of-intraduodenal-fat-and-glucose-on-the-gut-incretin-axis-in-healthy-males
#20
Tongzhi Wu, Christopher K Rayner, Linda E Watson, Karen L Jones, Michael Horowitz, Tanya J Little
BACKGROUND: The interaction of nutrients with the small intestine stimulates the secretion of numerous enteroendocrine hormones that regulate postprandial metabolism. However, differences in gastrointestinal hormonal responses between the macronutrients are incompletely understood. In the present study, we compared blood glucose and plasma hormone concentrations in response to standardised intraduodenal (ID) fat and glucose infusions in healthy humans. METHODS: In a parallel study design, 16 healthy males who received an intraduodenal fat infusion were compared with 12 healthy males who received intraduodenal glucose, both at a rate of 2kcal/min over 120min...
August 8, 2017: Peptides
journal
journal
28024
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"