ANGIOTENSIN II INCREASES TISSUE‐SPECIFIC INHIBITOR OF METALLOPROTEINASE‐2 EXPRESSION IN RAT AORTIC SMOOTH MUSCLE CELLS IN VIVO: EVIDENCE OF A PRESSURE‐INDEPENDENT EFFECT (English)

Clinical and Experimental Pharmacology and Physiology

Angiotensin (Ang) II plays a major role in vascular remodelling. Matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) are involved in the tissue remodelling processes. The aim of the present study was to investigate whether AngII modulates TIMP‐2 expression in rat aortic smooth muscle cells in vivo.

Angiotensin II (200 ng/kg per min, s.c.) or AngII + losartan (10 mg/kg per day, s.c.) or normal saline was administered continuously by osmotic minipumps to Sprague‐Dawley rats for 1 week. In addition, the effect of endogenous AngII on TIMP‐2 expression was evaluated in renovascular hypertensive rats (two kidney, one clip (2K1C) and one kidney, one clip (1K1C) models). Control rats (sham 2K1C and sham 1K1C rats) underwent sham‐clipping of the left renal artery. At the end of the treatment, plasma renin activity was measured by radioimmunoassay, aortic TIMP‐2 mRNA expression was evaluated by real‐time polymerase chain reaction and/or northern blotting and protein expression was evaluated by immunohistochemistry. Systolic blood pressure (SBP) was measured twice a week by the tail‐cuff method.

Exogenous AngII administration produced the expected increase in SBP (P = 0.02) compared with the control saline‐treated group. The increase in SBP was abolished in AngII + losartan‐treated rats. Administration of AngII caused a significant increase in TIMP‐2 expression (P = 0.01) in rat aortic smooth muscle cells that was abolished in AngII + losartan‐treated rats. In renovascular hypertensive rats, SBP was higher (P <� 0.0001) in 2K1C and 1K1C rats compared with the corresponding sham‐operated rats. Plasma renin activity was higher (P <� 0.01) in 2K1C rats compared with the other groups. The expression of TIMP‐2 was significantly (P <� 0.05) increased only in 2K1C rats.

Our in vivo data demonstrate that exogenous and endogenous AngII increases TIMP‐2 expression in rat aortic smooth muscle cells. This effect is not dependent on the AngII‐induced increase in blood pressure and is mediated by angiotensin AT1 receptors.

How to get this document?
Download
Commercial Copyright fee: €37.76 Basic fee: €4.00 Total price: €41.76
Academic Copyright fee: €37.76 Basic fee: €2.00 Total price: €39.76

Document information


Table of contents – Volume 34, Issue 3

Show all volumes and issues

Tables of content are generated automatically and are based on records of articles contained that are available in the TIB-Portal index. Due to missing records of articles, the volume display may be incomplete, even though the whole journal is available at TIB.

135
CHOLESTEROL, STATINS AND CANCER
Brown, Andrew J | 2007
142
EFFICACY OF SARGASSUM POLYCYSTUM (PHAEOPHYCEAE) SULPHATED POLYSACCHARIDE AGAINST PARACETAMOL‐INDUCED DNA FRAGMENTATION AND MODULATION OF MEMBRANE‐BOUND PHOSPHATASES DURING TOXIC HEPATITIS
Raghavendran, HB / Sathivel, A / Yogeeta, RSSK / Devaki, T | 2007
148
FUNCTIONAL IMPAIRMENT OF CARDIAC TRANSIENT OUTWARD K+ CURRENT AS A RESULT OF ABNORMALLY ALTERED CELLULAR ENVIRONMENT
Du, Zhimin / Chaoqian, Xu / Shan, Hongli / Lu, Yanjie / Ren, Nanqi | 2007
153
ANGIOTENSIN II‐INDUCED GROWTH OF VASCULAR SMOOTH MUSCLE CELLS IS ASSOCIATED WITH MODULATION OF CELL SURFACE AREA AND PLATELET‐DERIVED GROWTH FACTOR RECEPTOR EXPRESSION
Kuma, Sosei / Oki, Eiji / Onohara, Toshihiro / Komori, Kimihiro / Maehara, Yoshihiko | 2007
161
CHANGES IN THE IN VITRO PHARMACODYNAMIC PROPERTIES OF METOPROLOL IN ATRIA ISOLATED FROM SPONTANEOUSLY HYPERTENSIVE RATS
Di Verniero, Carla / Höcht, Christian / Opezzo, Javier A W / Taira, Carlos A | 2007
166
CARDIOPROTECTIVE EFFECTS OF A NON‐ALCOHOLIC EXTRACT OF RED WINE DURING ISCHAEMIA AND REPERFUSION IN SPONTANEOUSLY HYPERTENSIVE RATS
Fantinelli, Juliana C / Mosca, Susana M | 2007
170
EFFECTS OF SHRIMP (MACROBRACIUM ROSENBERGII)‐DERIVED CHITOSAN ON PLASMA LIPID PROFILE AND LIVER LIPID PEROXIDE LEVELS IN NORMO‐ AND HYPERCHOLESTEROLAEMIC RATS
Hossain, Shahdat / Rahman, Azizur / Kabir, Yearul / Shams, Ali Ahmed / Afros, Fahmida / Hashimoto, Michio | 2007
177
NEUROPROTECTIVE EFFECTS OF DAURICINE AGAINST APOPTOSIS INDUCED BY TRANSIENT FOCAL CEREBRAL ISCHAEMIA IN RATS VIA A MITOCHONDRIAL PATHWAY
Li, Yan‐Hong / Gong, Pei‐Li | 2007
185
FIBRIN D‐DIMER FRAGMENTS ENHANCE INFLAMMATORY RESPONSES IN MACROPHAGES: ROLE IN ADVANCING ATHEROSCLEROSIS
Zhou, Dong / Yang, Peng‐Yuan / Zhou, Bin / Rui, Yao‐Cheng | 2007
191
DIFFERENTIAL DEVELOPMENT OF CARBACHOL‐INDUCED DESENSITIZATION IN RECEPTOR‐MEDIATED Ca2+ INFLUX AND Ca2+ RELEASE PATHWAYS IN SMOOTH MUSCLE OF GUINEA‐PIG TAENIA CAECI
Hishinuma, Shigeru / Matsumoto, Yukio / Sato, Ryo / Saito, Masaki | 2007
198
AMINO ACID AND FATTY ACID COMPOSITION OF AN AQUEOUS EXTRACT OF CHANNA STRIATUS (HARUAN) THAT EXHIBITS ANTINOCICEPTIVE ACTIVITY
Zakaria, ZA / Mat Jais, AM / Goh, YM / Sulaiman, MR / Somchit, MN | 2007
205
ANGIOTENSIN II INCREASES TISSUE‐SPECIFIC INHIBITOR OF METALLOPROTEINASE‐2 EXPRESSION IN RAT AORTIC SMOOTH MUSCLE CELLS IN VIVO: EVIDENCE OF A PRESSURE‐INDEPENDENT EFFECT
Castoldi, G / Di Gioia, CRT / Travaglini, C / Busca, G / Redaelli, S / Bombardi, C / Stella, A | 2007
210
STOBADINE PROTECTS RAT KIDNEY AGAINST ISCHAEMIA/REPERFUSION INJURY
Guz, Galip / Demirogullari, Billur / Ulusu, Nuray N / Dogu, Cihangir / Demirtola, Arzu / Kavutcu, Mustafa / Omeroglu, Suna / Stefek, Milan / Karasu, Cimen | 2007
217
POTENTIAL FOR ENDOTHELIN‐1‐MEDIATED IMPAIRMENT OF CONTRACTILE ACTIVITY IN HYPERTENSION
Kolka, Cathryn M / Rattigan, Stephen / Richards, Stephen M / Clark, Michael G | 2007
223
ROLE OF DORSAL HIPPOCAMPAL CANNABINOID RECEPTORS AND NITRIC OXIDE IN ANXIETY LIKE BEHAVIOURS IN RATS USING THE ELEVATED PLUS‐MAZE TEST
Roohbakhsh, Ali / Moghaddam, Akbar Hajizadeh / Massoudi, Roohollah / Zarrindast, Mohammad‐Reza | 2007
230
DIFFERENTIAL GROWTH INHIBITION AND INDUCTION OF APOPTOSIS BY GOSSYPOL BETWEEN HCT116 AND HCT116/BAX−/– COLORECTAL CANCER CELLS
Zhang, Manchao / Liu, Hongpeng / Tian, Zhenkun / Huang, Jenny / Remo, Mylene / Li, Q Quentin | 2007
238
BENEFICIAL EFFECT OF XANTHOANGELOL, A CHALCONE COMPOUND FROM ANGELICA KEISKEI, ON LIPID METABOLISM IN STROKE‐PRONE SPONTANEOUSLY HYPERTENSIVE RATS
Ogawa, Hiroshi / Okada, Yukiko / Kamisako, Toshinori / Baba, Kimiye | 2007
244
AMELIORATIVE EFFECT OF CHLOROPHYTUM BORIVILIANUM ROOT ON LIPID METABOLISM IN HYPERLIPAEMIC RATS
Visavadiya, NP / Narasimhacharya, AVRL | 2007
250
ACUTE CORONARY LIGATION IN THE DOG INDUCES TIME‐DEPENDENT TRANSITIONAL CHANGES IN MITOCHONDRIAL CRISTA IN THE NON‐ISCHAEMIC VENTRICULAR MYOCARDIUM
McLachlan, Craig Steven / Almsherqi, Zakaria A / Chua, Kerin Sze Yi / Liew, Yu Ying / Low, Chwee Wah / Deng, Yuru | 2007
254
LETTER TO THE EDITOR
Palomeque, Jesús CG / Ruiz, Hugo G | 2007