@article {8511, title = {Genome-wide meta-analysis of SNP and antihypertensive medication interactions on left ventricular traits in African Americans.}, journal = {Mol Genet Genomic Med}, volume = {7}, year = {2019}, month = {2019 10}, pages = {e00788}, abstract = {

BACKGROUND: Left ventricular (LV) hypertrophy affects up to 43\% of African Americans (AAs). Antihypertensive treatment reduces LV mass (LVM). However, interindividual variation in LV traits in response to antihypertensive treatments exists. We hypothesized that genetic variants may modify the association of antihypertensive treatment class with LV traits measured by echocardiography.

METHODS: We evaluated the main effects of the three most common antihypertensive treatments for AAs as well as the single nucleotide polymorphism (SNP)-by-drug interaction on LVM and relative wall thickness (RWT) in 2,068 participants across five community-based cohorts. Treatments included thiazide diuretics (TDs), angiotensin converting enzyme inhibitors (ACE-Is), and dihydropyridine calcium channel blockers (dCCBs) and were compared in a pairwise manner. We performed fixed effects inverse variance weighted meta-analyses of main effects of drugs and 2.5~million SNP-by-drug interaction estimates.

RESULTS: We observed that dCCBs versus TDs were associated with higher LVM after adjusting for covariates (p~=~0.001). We report three SNPs at a single locus on chromosome 20 that modified the association between RWT and treatment when comparing dCCBs to ACE-Is with consistent effects across cohorts (smallest p~=~4.7~{\texttimes}~10 , minor allele frequency range 0.09-0.12). This locus has been linked to LV hypertrophy in a previous study. A marginally significant locus in BICD1 (rs326641) was validated in an external population.

CONCLUSIONS: Our study identified one locus having genome-wide significant SNP-by-drug interaction effect on RWT among dCCB users in comparison to ACE-I users. Upon additional validation in future studies, our findings can enhance the precision of medical approaches in hypertension treatment.

}, keywords = {African Americans, Angiotensin-Converting Enzyme Inhibitors, Antihypertensive Agents, Calcium Channel Blockers, Humans, Observational Studies as Topic, Pharmacogenomic Variants, Polymorphism, Single Nucleotide, Sodium Chloride Symporter Inhibitors, Ventricular Dysfunction, Left}, issn = {2324-9269}, doi = {10.1002/mgg3.788}, author = {Do, Anh N and Zhao, Wei and Baldridge, Abigail S and Raffield, Laura M and Wiggins, Kerri L and Shah, Sanjiv J and Aslibekyan, Stella and Tiwari, Hemant K and Limdi, Nita and Zhi, Degui and Sitlani, Colleen M and Taylor, Kent D and Psaty, Bruce M and Sotoodehnia, Nona and Brody, Jennifer A and Rasmussen-Torvik, Laura J and Lloyd-Jones, Donald and Lange, Leslie A and Wilson, James G and Smith, Jennifer A and Kardia, Sharon L R and Mosley, Thomas H and Vasan, Ramachandran S and Arnett, Donna K and Irvin, Marguerite R} } @article {9092, title = {Glucose dysregulation and subclinical cardiac dysfunction in older adults: The Cardiovascular Health Study.}, journal = {Cardiovasc Diabetol}, volume = {21}, year = {2022}, month = {2022 Jun 20}, pages = {112}, abstract = {

OBJECTIVE: We evaluated whether measures of glucose dysregulation are associated with subclinical cardiac dysfunction, as assessed by speckle-tracking echocardiography, in an older population.

METHODS: Participants were men and women in the Cardiovascular Health Study, age 65+ years and without coronary heart disease, atrial fibrillation, or heart failure at baseline. We evaluated fasting insulin resistance (IR) with the homeostatic model of insulin resistance (HOMA-IR) and estimated the Matsuda insulin sensitivity index (ISI) and insulin secretion with an oral glucose tolerance test. Systolic and diastolic cardiac mechanics were measured with speckle-tracking analysis of echocardiograms. Multi-variable adjusted linear regression models were used to investigate associations of insulin measures and cardiac mechanics.

RESULTS: Mean age for the 2433 included participants was 72.0~years, 33.6\% were male, and 3.7\% were black. After adjustment for age, sex, race, site, speckle-tracking analyst, echo image and quality score, higher HOMA-IR, lower Matsuda ISI, and higher insulin secretion were each associated with worse left ventricular (LV) longitudinal strain and LV early diastolic strain rate (p-value < 0.005); however, associations were significantly attenuated after adjustment for waist circumference, with the exception of Matsuda ISI and LV longitudinal strain (increase in strain per standard deviation increment in Matsuda ISI = 0.18; 95\% confidence interval = 0.03-0.33).

CONCLUSION: In this cross-sectional study of older adults, associations of glucose dysregulation with subclinical cardiac dysfunction were largely attenuated after adjusting for central adiposity.

}, keywords = {Aged, Cross-Sectional Studies, Female, Glucose, Humans, Insulin Resistance, Male, Ventricular Dysfunction, Left, Ventricular Function, Left}, issn = {1475-2840}, doi = {10.1186/s12933-022-01547-z}, author = {Garg, Parveen K and Biggs, Mary L and Kizer, Jorge R and Shah, Sanjiv J and Psaty, Bruce and Carnethon, Mercedes and Gottdiener, John S and Siscovick, David and Mukamal, Kenneth J} }