Effect of recombinant human growth hormone administration on body composition and vascular function and structure in old male Wistar rats
The process of ageing affects negatively both cardiovascular system and body composition. On the other hand, the hormones of the somatotrophic axis, growth hormone (GH) and insulin-like growth factor-I (IGF-I), whose production is reduced by age, are involved in the regulation of the cardiovascular system. The aim of this study was to investigate the effect of GH on body composition, vascular function and structure in old male rats. Old (20 months) and adult (4 months) male Wistar rats were used. One group of old animals was treated with GH for 4 weeks. Periepididimary fat weight, Specific Gravity Index (SGI), dose responses to Acetylcholine (ACh), Isoproterenol (Iso), Phenylephrine (Phe) and ACh in the presence of NG-nitro-L: -arginine metylester (L-NAME; ACh + L-NAME), as well as vascular morphology in aortic rings, were studied. Old rats showed increased fat weight and decreased SGI as compared to adult animals. GH increased SGI and tended to reduce fat weight. Old rats showed an impairment in the vasodilator response to ACh and Iso; GH significantly improved the vasodilatation induced by Iso, whereas the response to ACh was not significantly enhanced by GH treatment. There were no significant differences between adult and old rats in the contractile response to Phe, and GH did not show any effect. Contraction induced by ACh + L-NAME was higher in old rats as compared to adults, and treatment with GH significantly reduced this response. Aortic media area was increased in old rats, and GH administration reduced this parameter. In conclusion, GH shows beneficial effects on body composition, as well as on vascular function and morphology in old male rats.
| Medienart: |
Artikel |
|---|
| Erscheinungsjahr: |
2005 |
|---|---|
| Erschienen: |
2005 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:6 |
|---|---|
| Enthalten in: |
Biogerontology - 6(2005), 5 vom: 21., Seite 303-12 |
| Sprache: |
Englisch |
|---|
| Beteiligte Personen: |
Castillo, Carmen [VerfasserIn] |
|---|
| Anmerkungen: |
Date Completed 27.09.2006 Date Revised 21.11.2013 published: Print Citation Status MEDLINE |
|---|
| Förderinstitution / Projekttitel: |
|
|---|
| PPN (Katalog-ID): |
NLM160574625 |
|---|
| LEADER | 01000naa a22002652 4500 | ||
|---|---|---|---|
| 001 | NLM160574625 | ||
| 003 | DE-627 | ||
| 005 | 20231223090354.0 | ||
| 007 | tu | ||
| 008 | 231223s2005 xx ||||| 00| ||eng c | ||
| 028 | 5 | 2 | |a pubmed24n0535.xml |
| 035 | |a (DE-627)NLM160574625 | ||
| 035 | |a (NLM)16463107 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rakwb | ||
| 041 | |a eng | ||
| 100 | 1 | |a Castillo, Carmen |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Effect of recombinant human growth hormone administration on body composition and vascular function and structure in old male Wistar rats |
| 264 | 1 | |c 2005 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ohne Hilfsmittel zu benutzen |b n |2 rdamedia | ||
| 338 | |a Band |b nc |2 rdacarrier | ||
| 500 | |a Date Completed 27.09.2006 | ||
| 500 | |a Date Revised 21.11.2013 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a The process of ageing affects negatively both cardiovascular system and body composition. On the other hand, the hormones of the somatotrophic axis, growth hormone (GH) and insulin-like growth factor-I (IGF-I), whose production is reduced by age, are involved in the regulation of the cardiovascular system. The aim of this study was to investigate the effect of GH on body composition, vascular function and structure in old male rats. Old (20 months) and adult (4 months) male Wistar rats were used. One group of old animals was treated with GH for 4 weeks. Periepididimary fat weight, Specific Gravity Index (SGI), dose responses to Acetylcholine (ACh), Isoproterenol (Iso), Phenylephrine (Phe) and ACh in the presence of NG-nitro-L: -arginine metylester (L-NAME; ACh + L-NAME), as well as vascular morphology in aortic rings, were studied. Old rats showed increased fat weight and decreased SGI as compared to adult animals. GH increased SGI and tended to reduce fat weight. Old rats showed an impairment in the vasodilator response to ACh and Iso; GH significantly improved the vasodilatation induced by Iso, whereas the response to ACh was not significantly enhanced by GH treatment. There were no significant differences between adult and old rats in the contractile response to Phe, and GH did not show any effect. Contraction induced by ACh + L-NAME was higher in old rats as compared to adults, and treatment with GH significantly reduced this response. Aortic media area was increased in old rats, and GH administration reduced this parameter. In conclusion, GH shows beneficial effects on body composition, as well as on vascular function and morphology in old male rats | ||
| 650 | 4 | |a Comparative Study | |
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 7 | |a Recombinant Proteins |2 NLM | |
| 650 | 7 | |a Vasoconstrictor Agents |2 NLM | |
| 650 | 7 | |a Vasodilator Agents |2 NLM | |
| 650 | 7 | |a Human Growth Hormone |2 NLM | |
| 650 | 7 | |a 12629-01-5 |2 NLM | |
| 650 | 7 | |a Isoproterenol |2 NLM | |
| 650 | 7 | |a L628TT009W |2 NLM | |
| 650 | 7 | |a Acetylcholine |2 NLM | |
| 650 | 7 | |a N9YNS0M02X |2 NLM | |
| 650 | 7 | |a NG-Nitroarginine Methyl Ester |2 NLM | |
| 650 | 7 | |a V55S2QJN2X |2 NLM | |
| 700 | 1 | |a Cruzado, Mar |e verfasserin |4 aut | |
| 700 | 1 | |a Ariznavarreta, Carmen |e verfasserin |4 aut | |
| 700 | 1 | |a Gil-Loyzaga, Pablo |e verfasserin |4 aut | |
| 700 | 1 | |a Lahera, Vicente |e verfasserin |4 aut | |
| 700 | 1 | |a Cachofeiro, Victoria |e verfasserin |4 aut | |
| 700 | 1 | |a Tresguerres, Jesús A F |e verfasserin |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Biogerontology |d 2000 |g 6(2005), 5 vom: 21., Seite 303-12 |w (DE-627)NLM116002239 |x 1389-5729 |7 nnns |
| 773 | 1 | 8 | |g volume:6 |g year:2005 |g number:5 |g day:21 |g pages:303-12 |
| 912 | |a GBV_USEFLAG_A | ||
| 912 | |a GBV_NLM | ||
| 951 | |a AR | ||
| 952 | |d 6 |j 2005 |e 5 |b 21 |h 303-12 | ||