Hypoglossal LTF is unaffected by intrapleural siRNA. Hypoglossal nerve amplitude (% baseline) following AIH exposure after pretreatment with intrapleural injections of nontargeting siRNA (NTsiRNA, n = 5), PKCθ siRNA (siPKCθ, n = 3), or PKCζ siRNA (siPKCζ, n = 3). All groups were significantly elevated compared with time control rats (NTsiRNA, n = 3; siPKCθ, n = 2; or siPKCζ, n = 3 + no AIH, n = 8). *p < 0.05, significant difference versus time control.