High calcium diet down-regulates kidney angiotensin-converting enzyme in experimental renal failure

High calcium diet down-regulates kidney angiotensin-converting enzyme in experimental renal failure. Calcium salts are used as phosphate binders in renal failure, while high calcium diet also improves vasorelaxation and enhances natriuresis. The influences of calcium intake on renal renin-angiotensi...

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Veröffentlicht in:Kidney international 2004-12, Vol.66 (6), p.2155-2166
Hauptverfasser: Pörsti, Ilkka, Fan, Meng, Kööbi, Peeter, Jolma, Pasi, Kalliovalkama, Jarkko, Vehmas, Tuija I., Helin, Heikki, Holthöfer, Harry, Mervaala, Eero, Nyman, Tuulikki, Tikkanen, Ilkka
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container_end_page 2166
container_issue 6
container_start_page 2155
container_title Kidney international
container_volume 66
creator Pörsti, Ilkka
Fan, Meng
Kööbi, Peeter
Jolma, Pasi
Kalliovalkama, Jarkko
Vehmas, Tuija I.
Helin, Heikki
Holthöfer, Harry
Mervaala, Eero
Nyman, Tuulikki
Tikkanen, Ilkka
description High calcium diet down-regulates kidney angiotensin-converting enzyme in experimental renal failure. Calcium salts are used as phosphate binders in renal failure, while high calcium diet also improves vasorelaxation and enhances natriuresis. The influences of calcium intake on renal renin-angiotensin system (RAS) are largely unknown. Four weeks after NTX, rats were put on 3.0% or 0.3% calcium diet for 8 weeks (12-week study). In additional experiments, 15 weeks after NTX, rats were put on similar diets for 12 weeks (27-week study). Appropriate blood, urine, and kidney samples were taken. Renal angiotensin-converting enzyme (ACE) and angiotensin II receptors (AT1, AT2) were examined using autoradiography, ACE also using Western blotting, and connective tissue growth factor (CTGF) using immunohistochemistry. In the 12-week study, albuminuria increased 5-fold in NTX rats, but only 2-fold in calcium NTX rats on 3.0% calcium. In the 27-week study, high calcium intake decreased blood pressure, retarded progression of renal failure, reduced glomerulosclerosis, interstitial damage, and aortic calcifications, and improved survival from 50% to 92% in NTX rats. In both experiments plasma parathyroid hormone and phosphate were elevated after NTX, and suppressed by high calcium diet, while kidney ACE was down-regulated by 40% or more after increased calcium intake. In the 27-week study renal CTGF was decreased and cortical AT1 receptor density reduced after high calcium diet. High calcium diet down-regulated kidney ACE, reduced albuminuria and blood pressure, and favorably influenced kidney morphology in experimental renal failure. These findings suggest a link between calcium metabolism and kidney ACE expression, which may play a role in the progression of renal damage.
doi_str_mv 10.1111/j.1523-1755.2004.66006.x
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Calcium salts are used as phosphate binders in renal failure, while high calcium diet also improves vasorelaxation and enhances natriuresis. The influences of calcium intake on renal renin-angiotensin system (RAS) are largely unknown. Four weeks after NTX, rats were put on 3.0% or 0.3% calcium diet for 8 weeks (12-week study). In additional experiments, 15 weeks after NTX, rats were put on similar diets for 12 weeks (27-week study). Appropriate blood, urine, and kidney samples were taken. Renal angiotensin-converting enzyme (ACE) and angiotensin II receptors (AT1, AT2) were examined using autoradiography, ACE also using Western blotting, and connective tissue growth factor (CTGF) using immunohistochemistry. In the 12-week study, albuminuria increased 5-fold in NTX rats, but only 2-fold in calcium NTX rats on 3.0% calcium. 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Renal failure ; parathyroid hormone ; Parathyroid Hormone - blood ; Peptidyl-Dipeptidase A - metabolism ; phosphate ; Phosphates - blood ; Rats ; Rats, Sprague-Dawley ; Renal failure ; Renal Insufficiency - drug therapy ; Renal Insufficiency - metabolism ; Renal Insufficiency - pathology ; Renin-Angiotensin System - drug effects ; Renin-Angiotensin System - physiology</subject><ispartof>Kidney international, 2004-12, Vol.66 (6), p.2155-2166</ispartof><rights>2004 International Society of Nephrology</rights><rights>2005 INIST-CNRS</rights><rights>Copyright Nature Publishing Group Dec 2004</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c532t-19e4edd01bbb136e8563687afd8f6deb2479de7292102af52edc1617e0070aac3</citedby><cites>FETCH-LOGICAL-c532t-19e4edd01bbb136e8563687afd8f6deb2479de7292102af52edc1617e0070aac3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.proquest.com/docview/210108890?pq-origsite=primo$$EHTML$$P50$$Gproquest$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,64385,64387,64389,72469</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=16330779$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15569305$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Pörsti, Ilkka</creatorcontrib><creatorcontrib>Fan, Meng</creatorcontrib><creatorcontrib>Kööbi, Peeter</creatorcontrib><creatorcontrib>Jolma, Pasi</creatorcontrib><creatorcontrib>Kalliovalkama, Jarkko</creatorcontrib><creatorcontrib>Vehmas, Tuija I.</creatorcontrib><creatorcontrib>Helin, Heikki</creatorcontrib><creatorcontrib>Holthöfer, Harry</creatorcontrib><creatorcontrib>Mervaala, Eero</creatorcontrib><creatorcontrib>Nyman, Tuulikki</creatorcontrib><creatorcontrib>Tikkanen, Ilkka</creatorcontrib><title>High calcium diet down-regulates kidney angiotensin-converting enzyme in experimental renal failure</title><title>Kidney international</title><addtitle>Kidney Int</addtitle><description>High calcium diet down-regulates kidney angiotensin-converting enzyme in experimental renal failure. Calcium salts are used as phosphate binders in renal failure, while high calcium diet also improves vasorelaxation and enhances natriuresis. The influences of calcium intake on renal renin-angiotensin system (RAS) are largely unknown. Four weeks after NTX, rats were put on 3.0% or 0.3% calcium diet for 8 weeks (12-week study). In additional experiments, 15 weeks after NTX, rats were put on similar diets for 12 weeks (27-week study). Appropriate blood, urine, and kidney samples were taken. Renal angiotensin-converting enzyme (ACE) and angiotensin II receptors (AT1, AT2) were examined using autoradiography, ACE also using Western blotting, and connective tissue growth factor (CTGF) using immunohistochemistry. In the 12-week study, albuminuria increased 5-fold in NTX rats, but only 2-fold in calcium NTX rats on 3.0% calcium. 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Urinary tract diseases</topic><topic>Nephropathies. Renovascular diseases. Renal failure</topic><topic>parathyroid hormone</topic><topic>Parathyroid Hormone - blood</topic><topic>Peptidyl-Dipeptidase A - metabolism</topic><topic>phosphate</topic><topic>Phosphates - blood</topic><topic>Rats</topic><topic>Rats, Sprague-Dawley</topic><topic>Renal failure</topic><topic>Renal Insufficiency - drug therapy</topic><topic>Renal Insufficiency - metabolism</topic><topic>Renal Insufficiency - pathology</topic><topic>Renin-Angiotensin System - drug effects</topic><topic>Renin-Angiotensin System - physiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pörsti, Ilkka</creatorcontrib><creatorcontrib>Fan, Meng</creatorcontrib><creatorcontrib>Kööbi, Peeter</creatorcontrib><creatorcontrib>Jolma, Pasi</creatorcontrib><creatorcontrib>Kalliovalkama, Jarkko</creatorcontrib><creatorcontrib>Vehmas, Tuija I.</creatorcontrib><creatorcontrib>Helin, Heikki</creatorcontrib><creatorcontrib>Holthöfer, Harry</creatorcontrib><creatorcontrib>Mervaala, Eero</creatorcontrib><creatorcontrib>Nyman, Tuulikki</creatorcontrib><creatorcontrib>Tikkanen, Ilkka</creatorcontrib><collection>ScienceDirect Open Access Titles</collection><collection>Elsevier:ScienceDirect:Open Access</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Calcium &amp; Calcified Tissue Abstracts</collection><collection>ProQuest Nursing and Allied Health Journals</collection><collection>ProQuest Health and Medical</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Medical Database (Alumni Edition)</collection><collection>ProQuest Pharma Collection</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Health &amp; Medical Complete (Alumni)</collection><collection>Health &amp; Medical Collection (Alumni Edition)</collection><collection>PML(ProQuest Medical Library)</collection><collection>Nursing &amp; Allied Health Premium</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>MEDLINE - Academic</collection><jtitle>Kidney international</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pörsti, Ilkka</au><au>Fan, Meng</au><au>Kööbi, Peeter</au><au>Jolma, Pasi</au><au>Kalliovalkama, Jarkko</au><au>Vehmas, Tuija I.</au><au>Helin, Heikki</au><au>Holthöfer, Harry</au><au>Mervaala, Eero</au><au>Nyman, Tuulikki</au><au>Tikkanen, Ilkka</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High calcium diet down-regulates kidney angiotensin-converting enzyme in experimental renal failure</atitle><jtitle>Kidney international</jtitle><addtitle>Kidney Int</addtitle><date>2004-12-01</date><risdate>2004</risdate><volume>66</volume><issue>6</issue><spage>2155</spage><epage>2166</epage><pages>2155-2166</pages><issn>0085-2538</issn><eissn>1523-1755</eissn><coden>KDYIA5</coden><abstract>High calcium diet down-regulates kidney angiotensin-converting enzyme in experimental renal failure. 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In the 27-week study, high calcium intake decreased blood pressure, retarded progression of renal failure, reduced glomerulosclerosis, interstitial damage, and aortic calcifications, and improved survival from 50% to 92% in NTX rats. In both experiments plasma parathyroid hormone and phosphate were elevated after NTX, and suppressed by high calcium diet, while kidney ACE was down-regulated by 40% or more after increased calcium intake. In the 27-week study renal CTGF was decreased and cortical AT1 receptor density reduced after high calcium diet. High calcium diet down-regulated kidney ACE, reduced albuminuria and blood pressure, and favorably influenced kidney morphology in experimental renal failure. 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subjects Albuminuria - drug therapy
Albuminuria - metabolism
Albuminuria - pathology
angiotensin-converting enzyme
Animals
Aorta - pathology
Biological and medical sciences
calcium diet
Calcium, Dietary - pharmacology
Connective Tissue Growth Factor
Down-Regulation - drug effects
Immediate-Early Proteins - metabolism
Intercellular Signaling Peptides and Proteins - metabolism
Kidney - enzymology
Kidney - pathology
Male
Medical sciences
Nephrology. Urinary tract diseases
Nephropathies. Renovascular diseases. Renal failure
parathyroid hormone
Parathyroid Hormone - blood
Peptidyl-Dipeptidase A - metabolism
phosphate
Phosphates - blood
Rats
Rats, Sprague-Dawley
Renal failure
Renal Insufficiency - drug therapy
Renal Insufficiency - metabolism
Renal Insufficiency - pathology
Renin-Angiotensin System - drug effects
Renin-Angiotensin System - physiology
title High calcium diet down-regulates kidney angiotensin-converting enzyme in experimental renal failure
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