Results 71 to 80 of about 67,731 (192)

Electroacupuncture attenuates retinal ischemia/reperfusion injury by protecting the outer blood-retina barrier via enkephalins activate delta opioid receptor

open access: yesWorld Journal of Acupuncture - Moxibustion
Objectives: Retinal ischemia-reperfusion (RIR) injury results in irreversible visual impairments. The disruption of the outer blood-retinal barrier (OBRB) is a major ocular pathogenic process that RIR injury affects.
Ping CHEN   +7 more
doaj   +1 more source

Neurotransmitter Imbalance in Tension-Type Headache: A Systematic Review of Mechanisms and Therapeutic Targets

open access: yesPain and Therapy
Introduction Tension-type headache (TTH) is the most prevalent primary headache disorder worldwide, yet its neurobiological underpinnings remain partially understood.
Lanfranco Pellesi   +6 more
doaj   +1 more source

Influence of methionine-enkephalin and morphine on myoelectric activity of small bowel

open access: yes, 1980
Enkephalins, naturally occurring peptides with powerful opiatelike effects, have recently been detected throughout the tissues of the alimentary tract, but their role is unknown.
A. Dembinski   +4 more
core   +1 more source

Enkephalin-induced inhibition of the isolated rat ileum is not blocked by naloxone

open access: yes, 1981
Both methionine- and leucine-enkephalin caused the isolated rat ileum to relax in a concentration-dependent manner; the EC50 values were in the order of 10−8 to 10−7 M. This isolated preparation was generally not sensitive to morphine.
K. Nakatsu   +3 more
core   +1 more source

Opioid pathways in an avian retina. I. The content, biosynthesis, and release of Met5-enkephalin

open access: yes, 1985
By means of an enzyme-linked immunosorbent assay, the concentration of enkephalin-immunoreactive substances was estimated to be about 25 nM in the chicken retina.
CB Watt, DM Lam, YY Su
core   +1 more source

Effect of endogenous opioid peptides on acetylcholine release from the cat superior cervical ganglion: selective effect of a heptapeptide

open access: yes, 1987
The present experiments show the presence of both metenkephalin-like and met-enkephalin-Arg6-Phe7-like immunoreactivity in the superior cervical ganglion of the cat; this was determined by radioimmunoassay after high-pressure liquid chromatography ...
B Collier, DM Araujo
core   +1 more source

Interaction of enkephalin and caerulein on guinea pig small intestine

open access: yes, 1983
This is a report on the effect of caerulein and methionine-enkephalin interaction on mechanical contraction and acetylcholine release in vitro. The ability of enkephalin to relax caerulein-induced contractions and the manner in which the caerulein dose ...
M. L. Youther, W. M. Yau, P. F. Lingle
core   +1 more source

Cardiac synthesis, processing, and coronary release of enkephalin-related peptides

open access: yes, 2000
Although preproenkephalin mRNA is abundant in the heart, the myocardial synthesis and processing of proenkephalin is largely undefined. Isolated working rat hearts were perfused to determine the rate of myocardial proenkephalin synthesis, its processing ...
Edward G. Lakatta   +5 more
core   +1 more source

A study into the cobalamin-dependent methionine synthase reactivation mechanism in corynebacterium glutamicum [PDF]

open access: yes, 2009
PhDMethionine is one of the seven essential amino-acids for humans and is also used in feed supplements, predominantly for poultry and felines. Thus there is commercial interest in producing this nutrient. The final step in the biological synthesis of
Burton-Smith, Raymond Nathaniel
core   +2 more sources

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