Hypertension-Associated Genes in the Mesenteric Artery of Three Spontaneously Hypertensive Rat Substrains Identified...

Area of Science:

• Cardiovascular Research
• Genetics and Genomics
• Molecular Biology

Background:

• Essential hypertension's molecular mechanisms remain incompletely understood.
• The mesenteric artery is crucial for regulating peripheral blood pressure.

Purpose of the Study:

• To identify candidate genes contributing to hypertension development.
• To investigate gene expression differences in mesenteric arteries of spontaneously hypertensive rat (SHR) substrains.

Main Methods:

• Utilized DNA microarrays to compare gene expression profiles.
• Analyzed mesenteric artery gene expression in SHR, stroke-prone SHR (SHRSP), and malignant SHRSP (M-SHRSP) substrains.
• Compared gene expression to normotensive Wistar Kyoto rats (WKY).

Main Results:

• Identified 31 overexpressed and 24 downregulated genes in hypertensive rats compared to WKY.
• Associated ADAM23 (negative potassium current regulator), KCNC2, and KCNQ5 with hypertension onset.
• Identified SPOCK2 and AGTRAP as genes that strengthen hypertension.

Conclusions:

• ADAM23, KCNC2, and KCNQ5 are implicated as factors in hypertension onset.
• SPOCK2 and AGTRAP are identified as factors that exacerbate hypertension.
• Findings advance understanding of hypertension pathophysiology and potential treatments.