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Title: Nerve growth factor gene and hypertension in spontaneously hypertensive rats.
Austin Authors: Kapuscinski, M;Charchar, F;Innes, B;Mitchell, G A;Norman, Trevor R ;Harrap, Stephen B
Affiliation: Department of Surgery, University of Melbourne, Austin Hospital, Victoria, Australia
Issue Date: 1-Feb-1996
Publication information: Journal of Hypertension; 14(2): 191-7
Abstract: High blood pressure in spontaneously hypertensive rat (SHR) is associated with increased sympathetic innervation of key tissues, possibly as the result of increased nerve growth factor (NGF). The aim of this study was to test for genetic linkage of the NGF gene to high blood pressure.We studied NGF gene expression in young SHR and examined linkage of the NGF locus to mean arterial pressure in genetically segregating crosses of SHR and normotensive Donryu (DRY) rats.NGF mRNA was measured by Northern blot, and a restriction fragment length polymorphism of the NGF gene revealed after digestion with the NsiI restriction enzyme was used to study inheritance.Levels of NGF mRNA were detected easily in the kidneys of 2-, 4- and 10-week-old SHR but not in age-matched DRY rats. In an F2 population, the blood pressure of rats homozygous for the DRY NGF allele was 6 mmHg less than in heterozygotes and 8 mmHg less than in rats homozygous for the SHR NGF allele (analysis of variance, P < 0.004). In backcross rats the blood pressure of NGF heterozygotes was not significantly different from that of SHR homozygotes.These results indicate differences in renal NGF mRNA in SHR during the development of hypertension and suggest that a genetic locus in or near the NGF gene contributes in a Mendelian dominant pattern to a significant increment in blood pressure in SHR.
Gov't Doc #: 8728296
Type: Journal Article
Subjects: Animals
Blood Pressure.genetics.physiology
Blotting, Northern
Gene Expression Regulation.physiology
Genetic Linkage
Nerve Growth Factors.biosynthesis.genetics
Polymorphism, Restriction Fragment Length
RNA, Messenger.analysis
Rats, Inbred SHR
Appears in Collections:Journal articles

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