Selective Impairment of Central Mediation of Baroreflex in Anesthetized Young-Adult Fischer 344 Rats Following Chronic Intermittent Hypoxia

نویسندگان

  • He Gu
  • Min Lin
  • Jianyu Liu
  • David Gozal
  • Karie E Scrogin
  • Robert Wurster
  • Mark W Chapleau
  • Xiuying Ma
  • Zixi Cheng
چکیده

Selective Impairment of Central Mediation of Baroreflex in Anesthetized Young-Adult Fischer 344 Rats Following Chronic Intermittent Hypoxia He Gu, Min Lin, Jianyu Liu, David Gozal, Karie E Scrogin, Robert Wurster, Mark W Chapleau, Xiuying Ma, Zixi (Jack) Cheng* Biomolecular Science Center, Burnett College of Biomedical Sciences, University of Central Florida, Orlando, FL 32816, Kosair Children’s Hospital Research Institute, Department of Pediatrics, University of Louisville School of Medicine, Louisville, Kentucky 40202, Department of Pharmacology and Physiology, Loyola University Chicago, Stritch School of Medicine, Maywood, IL 60153, Department of Internal Medicine, University of Iowa, and Veterans Affairs Medical Center, Iowa City, IA 52242, Running Header: CIH Modified Baroreflex Circuitry in Anesthetized Rats

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Selective impairment of central mediation of baroreflex in anesthetized young adult Fischer 344 rats after chronic intermittent hypoxia.

Baroreflex control of heart rate (HR) is impaired after chronic intermittent hypoxia (CIH). However, the location and nature of this response remain unclear. We examined baroreceptor afferent, vagal efferent, and central components of the baroreflex circuitry. Fischer 344 (F344) rats were exposed to room air (RA) or CIH for 35-50 days and were then anesthetized with isoflurane, ventilated, and ...

متن کامل

Inhibition of carotid sinus baroreflex in neonatal rats exposed to chronic intermittent hypobaric hypoxia.

Chronic intermittent hypobaric hypoxia (CIHH) facilitates carotid sinus baroreflex (CSB) in adult rats, but the effect of CIHH on CSB in young rats is not known. The purpose of present study was to investigate the effect of CIHH on CSB in the young rat treated with CIHH from neonatal age, and the role of nitric oxide (NO) and Ca²⁺ in the effect of CIHH. Neonatal male Sprague-Dawley rats were ra...

متن کامل

Chronic intermittent hypoxia impairs baroreflex control of heart rate but enhances heart rate responses to vagal efferent stimulation in anesthetized mice.

Chronic intermittent hypoxia (CIH) leads to increased sympathetic nerve activity and arterial hypertension. In this study, we tested the hypothesis that CIH impairs baroreflex (BR) control of heart rate (HR) in mice, and that decreased cardiac chronotropic responsiveness to vagal efferent activity contributes to such impairment. C57BL/6J mice were exposed to either room air (RA) or CIH (6-min a...

متن کامل

Postnatal intermittent hypoxia alters baroreflex function in adult rats.

Chronic perinatal intermittent hypoxia (IH) could have long-term cardiovascular effects by altering baroreflex function. To examine this hypothesis, we exposed rats (n = 6/group) for postnatal days 1-30 or prenatal embryonic days 5-21 to IH (8% ambient O2 for 90 s after 90 s of 21% of O2, 12 h/day) or to normoxia (control). Baroreflex sensitivity (BRS) and cardiac chronotropic responses were ex...

متن کامل

Carotid sinus nerve stimulation, but not intermittent hypoxia, induces respiratory LTF in adult rats exposed to neonatal intermittent hypoxia.

We tested the hypothesis that exposure to neonatal intermittent hypoxia (n-IH) in rat pups alters central integrative processes following acute and intermittent peripheral chemoreceptor activation in adults. Newborn male rats were exposed to n-IH or normoxia for 10 consecutive days after birth. We then used both awake and anesthetized 3- to 4-mo-old rats to record ventilation, blood pressure, a...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2007