標題: Effects of renal sympathetic denervation on the stellate ganglion and brain stem in dogs
作者: Tsai, Wei-Chung
Chan, Yi-Hsin
Chinda, Kroekkiat
Chen, Zhenhui
Patel, Jheel
Shen, Changyu
Zhao, Ye
Jiang, Zhaolei
Yuan, Yuan
Ye, Michael
Chen, Lan S.
Riley, Amanda A.
Persohn, Scott A.
Territo, Paul R.
Everett, Thomas H.
Lin, Shien-Fong
Vinters, Harry V.
Fishbein, Michael C.
Chen, Peng-Sheng
分子醫學與生物工程研究所
Institute of Molecular Medicine and Bioengineering
關鍵字: Nervous system;Sympathetic;Trans-synaptic degeneration;Arrhythmia;Neuromodulation
公開日期: 1-Feb-2017
摘要: BACKGROUND Renal sympathetic denervation (RD) is a promising method of neuromodulation for the management of cardiac arrhythmia. OBJECTIVE We tested the hypothesis that RD is antiarrhythmic in ambulatory dogs because it reduces the stellate ganglion nerve activity (SGNA) by remodeling the stellate ganglion (SG) and brain stem. METHODS We implanted a radiotransmitter to record SGNA and electrocardiogram in 9 ambulatory dogs for 2 weeks, followed by a second surgery for RD and 2 months SGNA recording. Cell death was probed by terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay. RESULTS Integrated SGNA at baseline and 1 and 2 months after RD were 14.0 +/- 4.0, 9.3 +/- 2.8, and 9.6 +/- 2.0 mu V, respectively (P = .042). The SG from RD but not normal control dogs (n = 5) showed confluent damage. An average of 41% +/- 10% and 40% +/- 16% of ganglion cells in the left and right SG, respectively, were TUNEL positive in RD dogs compared with 0% in controls dogs (P = .005 for both). The left and right SG from RD dogs had more tyrosine hydroxylase-negative ganglion cells than did the left SG of control dogs (P = .028 and P = .047, respectively). Extensive TUNEL-positive neurons and glial cells were also noted in the medulla, associated with strongly positive glial fibrillary acidic protein staining. The distribution was heterogeneous, with more cell death in the medial than lateral aspects of the medulla. CONCLUSION Bilateral RD caused significant central and peripheral sympathetic nerve remodeling and reduced SGNA in ambulatory dogs. These findings may in part explain the antiarrhythmic effects of RD.
URI: http://dx.doi.org/10.1016/j.hrthm.2016.10.003
http://hdl.handle.net/11536/144864
ISSN: 1547-5271
DOI: 10.1016/j.hrthm.2016.10.003
期刊: HEART RHYTHM
Volume: 14
起始頁: 255
結束頁: 262
Appears in Collections:Articles