PMID- 17689021 OWN - NLM STAT- MEDLINE DCOM- 20080502 LR - 20080903 IS - 0306-9877 (Print) IS - 0306-9877 (Linking) VI - 70 IP - 2 DP - 2008 TI - The fibrosis and atrial fibrillation: is the transforming growth factor-beta 1 a candidate etiology of atrial fibrillation. PG - 317-9 AB - Atrial fibrillation (AF) is the most commonly occurring arrhythmia in clinical practice, however, the mechanism of atrial fibrillation is not well explained. It has been considered that myocardial fibrosis plays a role in atrial fibrillation. Within the heart, this fibrosis is thought to be mediated by transforming growth factor-beta 1 (TGF-beta 1), a potent stimulator of collagen-producing cardiac fibroblasts. Recent studies indicate that atrial fibrillation is associated with elevated serum concentrations of TGF-beta 1 and C-terminal propeptide of procollagen type I (a marker of collagen type I synthesis). TGF-beta 1 was not only associated with the presence of atrial fibrillation but may also predict patients at increased risk for future development of atrial fibrillation. Why TGF-beta 1 in atrial fibrillation is high is a puzzling problem. We hypothesized that TGF-beta 1 is a possible cause of atrial fibrillation by initiating fibrosis response. Atrial interstitial fibrosis has been seen in patients with CHF and in animal models of pacing-induced heart failure. It was demonstrated that TGF-beta 1 levels were increased in the atria after the development of congestive heart failure in dogs. In a similar study, mice with increased expression of TGF-beta 1 were prone to atrial fibrillation development as a result of raised levels of atrial fibrosis. If the hypothesis is confirmed, administration of TGF-beta 1 monoclonal antibodies may be used to eliminate the etiology. It will be a new target point to treat atrial fibrillation. FAU - Li, Xuping AU - Li X AD - Department of Cardiology, Beijing AnZhen Hospital, Capital Medical University, Beijing 100029, PR China. FAU - Ma, Changsheng AU - Ma C FAU - Dong, Jianzeng AU - Dong J FAU - Liu, Xingpeng AU - Liu X FAU - Long, Deyong AU - Long D FAU - Tian, Yin AU - Tian Y FAU - Yu, Ronghui AU - Yu R LA - eng PT - Journal Article DEP - 20070803 PL - United States TA - Med Hypotheses JT - Medical hypotheses JID - 7505668 RN - 0 (Angiotensin-Converting Enzyme Inhibitors) RN - 0 (Antibodies, Monoclonal) RN - 0 (Transforming Growth Factor beta1) SB - IM CIN - Med Hypotheses. 2008;71(1):149-50. PMID: 18329183 MH - Angiotensin-Converting Enzyme Inhibitors/pharmacology MH - Animals MH - Antibodies, Monoclonal/pharmacology MH - Atrial Fibrillation/*etiology/pathology/physiopathology/therapy MH - Fibrosis MH - Humans MH - Models, Cardiovascular MH - Myocardium/pathology MH - Transforming Growth Factor beta1/antagonists & inhibitors/immunology/*physiology EDAT- 2007/08/11 09:00 MHDA- 2008/05/03 09:00 CRDT- 2007/08/11 09:00 PHST- 2007/04/10 00:00 [received] PHST- 2007/04/17 00:00 [accepted] PHST- 2007/08/11 09:00 [pubmed] PHST- 2008/05/03 09:00 [medline] PHST- 2007/08/11 09:00 [entrez] AID - S0306-9877(07)00383-0 [pii] AID - 10.1016/j.mehy.2007.04.046 [doi] PST - ppublish SO - Med Hypotheses. 2008;70(2):317-9. doi: 10.1016/j.mehy.2007.04.046. Epub 2007 Aug 3.