Main Page
Faculty Deanship
Dean
Health Empowerment Unit
Strategic Planning Unit
Development and Quality Unit
Medical and Bioethics Unit
Vice Dean for Graduate Studies and Research
Vice Dean for Female Section
Vice dean for Academic Affairs
Examination and Assessment Unit
Internship and Alumni Unit
Student Research Unit
E-learning Unit
Student Mentoring and Support Unit
Community Service Unit
Talent and Creativity Care Unit
Continuing Education Unit
Neuroscience Research Unit
Vice Deanship of Clinical Affairs / Administration
Organizational Structure
Departments
Basic Sciences
Department of Anatomy
Department of Pharmacology
Department of Pathology
Department of Microbiology and Medical Parasitolog
Deparment of Clinical Biochemistry
Department of Physiology
Department of Medical Genetics
Clinical Sciences
Department of Otorhinolaryngology
Department of Obstetrics and Gynecology
Department of Hematology
Department of Medical Education
Department of Anesthesia
Department of Family Medicine
Department of Community Medicine
Department of Surgery
Department of Orthopedic Surgery
Department of ophthalmology
Department of Radiology
Department of Internal Medicine
Department of Pediatrics
Department of Emergency Medicine
Department of Urology
Department of Dermatology
Latest News
عربي
English
About
Admission
Academic
Research and Innovations
University Life
E-Services
Search
Faculty of Medicine
Document Details
Document Type
:
Article In Journal
Document Title
:
Glutamine metabolism in skeletal muscle of glucocorticoid-treated rats
Glutamine metabolism in skeletal muscle of glucocorticoid-treated rats
Subject
:
Biochemistry
Document Language
:
English
Abstract
:
1. The effect of dexamethasone (30 micrograms day-1 100 g-1 body weight) on the regulation of glutamine metabolism was studied in skeletal muscles of rats after 9 days of treatment. 2. Dexamethasone resulted in negative nitrogen balance, and produced increases in the plasma concentrations of alanine (23.4%) and insulin (158%) but a decrease in the plasma concentration of glutamine (28.7%). 3. Dexamethasone treatment increased the rate of glutamine production in muscle, skin and adipose tissue preparations, with muscle production accounting for over 90% of total glutamine produced by the hindlimb. 4. Blood flow and arteriovenous concentration difference measurements across the hindlimb showed an increase in the net exchange rates of glutamine (25.3%) and alanine (90.5%) in dexamethasone-treated rats compared with corresponding controls. 5. Dexamethasone treatment produced significant decreases in the concentrations of skeletal muscle glutamine (51.8%) and 2-oxoglutarate (50.8%). The concentrations of alanine (16.2%), pyruvate (45.9%), ammonia (43.3%) and inosine 5'-phosphate (141.8%) were increased. 6. The maximal activity of glutamine synthetase was increased (21-34%), but there was no change in that of glutaminase, in muscles of dexamethasone-treated rats. 7. It is concluded that glucocorticoid administration enhances the rates of release of both glutamine and alanine from skeletal muscle of rats (both in vitro and in vivo). This may be due to changes in efflux and/or increased intracellular formation of glutamine and alanine
ISSN
:
0143-5221
Journal Name
:
Clinical Science
Volume
:
79
Issue Number
:
2
Publishing Year
:
1411 AH
1990 AD
Article Type
:
Article
Added Date
:
Monday, December 5, 2011
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
محمد العرضاوي
Ardawi, Mohammed
Investigator
Doctorate
ياسر جمال
Jamal, Yasir
Researcher
Doctorate
Files
File Name
Type
Description
31525.pdf
pdf
Back To Researches Page