PMID- 28738166 OWN - NLM STAT- MEDLINE DCOM- 20180604 LR - 20180604 IS - 1205-7541 (Electronic) IS - 0008-4212 (Linking) VI - 95 IP - 11 DP - 2017 Nov TI - Ablation of toll-like receptor 4 mitigates cardiac mitochondrial dysfunction in hyperhomocysteinemia. PG - 1369-1375 LID - 10.1139/cjpp-2016-0744 [doi] AB - Hyperhomocysteinemia (HHcy) is a risk factor for adverse cardiovascular events; however, the mechanism for development of this disease is still unknown. Toll-like receptor 4 (TRL4) is a molecule involved in the immune response pathway and is quickly becoming a receptor of interest in the field of hypertension. In this study, we hypothesized that ablation of TLR4 mitigates cardiac mitochondrial dysfunction in a model of HHcy. Five strains of mice (C57BL/6J, CBS(+/-), C3H, CBS(+/-)/C3H, and C3H/HeOuJ) 10-12 weeks old were utilized. We found that HHcy causes heart hypertrophy and promotes oxidative stress while mice with HHcy and inactivated TLR4 showed significant improvement in examined parameters. A dominance of endothelial cell mitochondrial fission over mitochondrial fusion in HHcy and oxidative stress was observed, which may explain the endothelial cell loss and dysfunction that contributes to inward cardiac remodeling. FAU - Jeremic, Nevena AU - Jeremic N AD - Health Sciences Centre, Department of Physiology, School of Medicine, University of Louisville, 500 South Preston Street, Louisville, KY 40202, USA. AD - Health Sciences Centre, Department of Physiology, School of Medicine, University of Louisville, 500 South Preston Street, Louisville, KY 40202, USA. FAU - Weber, Gregory J AU - Weber GJ AD - Health Sciences Centre, Department of Physiology, School of Medicine, University of Louisville, 500 South Preston Street, Louisville, KY 40202, USA. AD - Health Sciences Centre, Department of Physiology, School of Medicine, University of Louisville, 500 South Preston Street, Louisville, KY 40202, USA. FAU - Tyagi, Suresh C AU - Tyagi SC AD - Health Sciences Centre, Department of Physiology, School of Medicine, University of Louisville, 500 South Preston Street, Louisville, KY 40202, USA. AD - Health Sciences Centre, Department of Physiology, School of Medicine, University of Louisville, 500 South Preston Street, Louisville, KY 40202, USA. LA - eng PT - Journal Article DEP - 20170724 PL - Canada TA - Can J Physiol Pharmacol JT - Canadian journal of physiology and pharmacology JID - 0372712 RN - 0 (Toll-Like Receptor 4) SB - IM MH - Animals MH - *Gene Deletion MH - Genotype MH - Hyperhomocysteinemia/*genetics/metabolism/*pathology MH - Hypertrophy/metabolism/pathology MH - Mice MH - Mitochondria, Heart/metabolism/*pathology MH - Mitochondrial Dynamics MH - Myocardium/metabolism/pathology MH - Oxidative Stress/genetics MH - Toll-Like Receptor 4/*deficiency/*genetics OTO - NOTNLM OT - coeur OT - heart OT - homocysteine OT - homocysteine OT - hyperhomocysteinemia OT - hyperhomocysteinemie OT - mitochondria OT - mitochondrie OT - recepteur de type Toll 4 OT - toll-like receptor 4 EDAT- 2017/07/25 06:00 MHDA- 2018/06/05 06:00 CRDT- 2017/07/25 06:00 PHST- 2017/07/25 06:00 [pubmed] PHST- 2018/06/05 06:00 [medline] PHST- 2017/07/25 06:00 [entrez] AID - 10.1139/cjpp-2016-0744 [doi] PST - ppublish SO - Can J Physiol Pharmacol. 2017 Nov;95(11):1369-1375. doi: 10.1139/cjpp-2016-0744. Epub 2017 Jul 24.