Key result
Deleterious SLC12A3 exon 21 variants are linked to severe hypokalemia and metabolic alkalosis in hypertensive males.
Why the study?
Hypertension is affected by genetic factors that play a role in kidney disturbances and ionic balance, prompting an assessment of the relationship between variants in exon 21 of the SLC12A3 gene and physiological changes in individuals with hypertension.
Do genetic variants in exon 21 of the SLC12A3 gene correlate with disturbances in renal electrolyte homeostasis, blood pH, and renin-angiotensin-aldosterone system activity in males with hypertension?
Cross-Sectional (n=30)
Do genetic variants in exon 21 of the SLC12A3 gene correlate with disturbances in renal electrolyte homeostasis, blood pH, and renin-angiotensin-aldosterone system activity in males with hypertension?
Deleterious missense variants in exon 21 of the SLC12A3 gene correlate with severe hypokalemia, hypomagnesemia, metabolic alkalosis, and secondary RAAS activation in hypertensive males, resembling a Gitelman syndrome-like renal tubular phenotype.
Hypothesis-generating in hypertensive electrolyte disorders; leaves open whether SLC12A3 genotyping aids risk stratification.
High blood pressure is a common disease in society. It is considered one of the diseases affected by genetic factors, so it plays a role in disturbances in the kidneys and ionic balance. This study focused on a key genetic factor, the SLC12A3 gene, specifically its coding region (exon 21), to assess the relationship between genetic variants and physiological changes in individuals with hypertension. The study involved conducting the necessary analyses to evaluate the physiological role of the study variables in patients, including potassium and magnesium levels, blood pH, renin, and aldosterone. Additionally, blood samples were used to amplify and sequence the genetic sequence, identifying variants. After identifying these variants in a sample of individuals, bioinformatics algorithms such as SIFT, Provean, and PolyPhen-2 were used to predict the role of these variants in the development of disorders. The results of this study demonstrated a positive correlation between most of the adverse variants and electrolyte imbalances, which can include decreased potassium and magnesium levels, as well as elevated blood pH. As for the non-harmful variants, a weaker correlation was observed with biophysical changes. However, in all cases, renin and aldosterone levels were elevated, reflecting the overactivity of the renin-angiotensin-aldosterone system. Therefore, the current study confirms that the identified alterations in exon 21 of the SLC12A3 gene, which is responsible for ionization in the kidneys, may affect normal kidney function, disrupt electrolyte balance, and contribute to disease severity. The analysis performed using bioinformatics algorithms reveals differences in physiological outcomes among hypertensive patients. Therefore, further studies with larger sample sizes are recommended to confirm these findings.
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Omar Qahtan Yaseen (2026) conducted a cross-sectional in Hypertension with electrolyte imbalance (n=30). Deleterious/damaging SLC12A3 exon 21 missense variants vs. Tolerated/neutral/benign SLC12A3 exon 21 missense variants was evaluated on Renal electrolyte homeostasis (blood potassium, magnesium, pH, renin, and aldosterone levels) and clinical phenotype severity. Deleterious SLC12A3 exon 21 variants were associated with severe hypokalemia (K+ 2.5-2.7 mmol/L), hypomagnesemia (Mg2+ 1.1-1.4 mg/dL), and metabolic alkalosis (pH 7.49-7.52) in hypertensive males.
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