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Perinatal inhibition of NF-kappaB has long-term antihypertensive effects in spontaneously hypertensive rats.
MedLine Citation:
PMID:  21505356     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
BACKGROUND: Excessive reactive oxygen species (ROS) activate the inflammatory transcription factor nuclear factor-kappa B (NF-κB). ROS-induced inflammation appears to be an early event in the development of hypertension in different models. In the spontaneously hypertensive rat (SHR) we investigated whether perinatal inhibition of NF-κB persistently decreases blood pressure. To probe antihypertensive mechanisms we studied natriuresis and sensitivity of blood pressure and renal hemodynamics to the superoxide dismutase mimetic Tempol. METHODS AND RESULTS: Perinatal pyrrolidine di thio carbamate (PDTC) (a NF-κB inhibitor), administered during pregnancy and lactation to SHR dams, persistently ameliorated hypertension up to 28 weeks of age in their offspring. Furthermore, after perinatal treatment with PDTC natriuresis was temporarily doubled at 4 weeks of age in both females and males. Urinary excretion of thiobarbituric acid reactive substances (an indirect measure of oxidative stress) was decreased by perinatal PDTC, persistently in females and temporarily in males. At 28 weeks, Tempol reduced arterial pressure in all groups, but had opposite effects in control and perinatal PDTC rats on renal vascular resistance (RVR), namely decreased RVR in controls and increased RVR in perinatal PDTC rats. CONCLUSION: These data indicate that increased activity of NF-κB very early in life, presumably in conjunction with oxidative stress, can lead to the development of hypertension. Perinatal inhibition of NF-κB has persistent antihypertensive effects. This could be related to a short phase of enhanced sodium excretion at an early age, and persistent changes of intrarenal vasoreactivity to ROS.
Authors:
Maarten P Koeners; Branko Braam; Jaap A Joles
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-17
Journal Detail:
Title:  Journal of hypertension     Volume:  -     ISSN:  1473-5598     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-4-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8306882     Medline TA:  J Hypertens     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
aDepartment of Nephrology and Hypertension, University Medical Center, Utrecht, The Netherlands bDivision of Nephrology and Immunology/Department Medicine, Canada cDepartment of Physiology, University of Alberta, Edmonton, Canada.
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