Document Detail

Fructose feeding increases insulin resistance but not blood pressure in Sprague-Dawley rats.
MedLine Citation:
PMID:  16157789     Owner:  NLM     Status:  MEDLINE    
Fructose feeding has been widely reported to cause hypertension in rats, as assessed indirectly by tail cuff plethysmography. Because there are potentially significant drawbacks associated with plethysmography, we determined whether blood pressure changes could be detected by long-term monitoring with telemetry in age-matched male Sprague-Dawley rats fed either a normal or high-fructose diet for 8 weeks. Fasting plasma glucose (171+/-10 versus 120+/-10 mg/dL), plasma insulin (1.8+/-0.5 versus 0.7+/-0.1 microg/L), and plasma triglycerides (39+/-2 versus 30+/-2 mg/dL) were modestly but significantly elevated in fructose-fed animals. Using the hyperinsulinemic euglycemic clamp technique, the rate of glucose infusion necessary to maintain equivalent plasma glucose was significantly reduced in fructose-fed compared with control animals (22.9+/-3.6 versus 41.5+/-2.9 mg/kg per minute; P<0.05). However, mean arterial pressure (24-hour) did not change in the fructose-fed animals over the 8-week period (111+/-1 versus 114+/-2 mm Hg; week 0 versus 8), nor was it different from that in control animals (109+/-2 mm Hg). Conversely, systolic blood pressure measured by tail cuff plethysmography at the end of the 8-week period was significantly greater in fructose-fed versus control animals (162+/-5 versus 139+/-1 mm Hg; P<0.001). Together, these data demonstrate that long-term fructose feeding induces mild insulin resistance but does not elevate blood pressure. We propose that previous reports of fructose-induced hypertension reflect a heightened stress response by fructose-fed rats associated with restraint and tail cuff inflation.
Gerard D'Angelo; Ahmed A Elmarakby; David M Pollock; David W Stepp
Related Documents :
7648669 - Acute hypertension induces heat-shock protein 70 gene expression in rat aorta.
25229929 - Antiretroviral therapy after cryptococcal meningitis.
9109619 - Food restriction reduces sympathetic support of blood pressure in spontaneously hyperte...
15126919 - Cardiovascular hypertrophy in one-kidney, one-clip renal hypertension is resistant to h...
16423349 - Perimicrovascular edema in the frontal cortex in a rat model of intraperitoneal sepsis.
11948289 - The hypertrophic heart rat: a new normotensive model of genetic cardiac and cardiomyocy...
12842819 - Nitric oxide synthase inhibition does not affect regulation of muscle sympathetic nerve...
2822879 - Resting and exercise blood pressure with atenolol, enalapril and a low-dose combination.
8025749 - Pulmonary hypertension in a murine model of the acquired immunodeficiency syndrome.
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.     Date:  2005-09-12
Journal Detail:
Title:  Hypertension     Volume:  46     ISSN:  1524-4563     ISO Abbreviation:  Hypertension     Publication Date:  2005 Oct 
Date Detail:
Created Date:  2005-09-30     Completed Date:  2005-12-15     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  7906255     Medline TA:  Hypertension     Country:  United States    
Other Details:
Languages:  eng     Pagination:  806-11     Citation Subset:  IM    
Vascular Biology Center, Medical College of Georgia, Augusta, GA 30912-2500, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Animal Feed
Blood Glucose / metabolism
Blood Pressure / drug effects*
Fasting / blood
Fructose / administration & dosage*,  pharmacology
Glucose Clamp Technique
Insulin / blood
Insulin Resistance / physiology*
Rats, Sprague-Dawley
Tail / blood supply
Time Factors
Triglycerides / blood
Grant Support
Reg. No./Substance:
0/Blood Glucose; 0/Triglycerides; 11061-68-0/Insulin; 30237-26-4/Fructose

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Effects of endurance training on blood pressure, blood pressure-regulating mechanisms, and cardiovas...
Next Document:  c-Src-dependent nongenomic signaling responses to aldosterone are increased in vascular myocytes fro...