Effects of bioactive peptide, valyl-prolyl-proline (VPP), and Lactobacillus helveticus fermented milk containing VPP on bone loss in ovariectomized rats

Background: Valyl-prolyl-proline (VPP), a bioactive peptide formed during the fermentation with Lactobacillus helveticus LBK-16H (L. helveticus), has been shown to increase bone formation in vitro. The aim of the study was to determine whether VPP and L. helveticus fermented milk prevent bone loss i...

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Veröffentlicht in:Annals of nutrition and metabolism 2007-01, Vol.51 (1), p.65-74
Hauptverfasser: Narva, Mirkka, Rissanen, Jukka, Halleen, Jussi, Vapaatalo, Heikki, Väänänen, Kalervo, Korpela, Riitta
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container_issue 1
container_start_page 65
container_title Annals of nutrition and metabolism
container_volume 51
creator Narva, Mirkka
Rissanen, Jukka
Halleen, Jussi
Vapaatalo, Heikki
Väänänen, Kalervo
Korpela, Riitta
description Background: Valyl-prolyl-proline (VPP), a bioactive peptide formed during the fermentation with Lactobacillus helveticus LBK-16H (L. helveticus), has been shown to increase bone formation in vitro. The aim of the study was to determine whether VPP and L. helveticus fermented milk prevent bone loss in ovariectomized (OVX) rats. Methods: During the 12-week intervention study, the OVX rats received VPP in water or L. helveticus fermented milk, containing VPP. Sham-operated rats receiving water acted as controls. The trabecular and cortical bone mineral density were determined by peripheral quantitative computed tomography before the operation and at 4 and 12 weeks. The mechanical testing and ash weight analysis as well as the static and dynamic histomorphometrical parameters were assessed at the end of the intervention. Results: VPP given in water showed no clear effect on bone loss. L. helveticus fermented milk prevented bone loss by decreasing bone turnover and increasing the bone mineral density. Ovariectomy caused a 57% loss in the trabecular bone, which was attenuated by 16% in the L. helveticus group. Conclusions: VPP peptide did not prevent ovariectomy-induced bone loss, which could be due to the poor bioavailability of VPP from water solution. L. helveticus fermented milk prevented bone loss, whether this is due to the VPP peptide cannot be concluded.
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The aim of the study was to determine whether VPP and L. helveticus fermented milk prevent bone loss in ovariectomized (OVX) rats. Methods: During the 12-week intervention study, the OVX rats received VPP in water or L. helveticus fermented milk, containing VPP. Sham-operated rats receiving water acted as controls. The trabecular and cortical bone mineral density were determined by peripheral quantitative computed tomography before the operation and at 4 and 12 weeks. The mechanical testing and ash weight analysis as well as the static and dynamic histomorphometrical parameters were assessed at the end of the intervention. Results: VPP given in water showed no clear effect on bone loss. L. helveticus fermented milk prevented bone loss by decreasing bone turnover and increasing the bone mineral density. Ovariectomy caused a 57% loss in the trabecular bone, which was attenuated by 16% in the L. helveticus group. Conclusions: VPP peptide did not prevent ovariectomy-induced bone loss, which could be due to the poor bioavailability of VPP from water solution. L. helveticus fermented milk prevented bone loss, whether this is due to the VPP peptide cannot be concluded.</description><identifier>ISSN: 0250-6807</identifier><identifier>EISSN: 1421-9697</identifier><identifier>DOI: 10.1159/000100823</identifier><identifier>PMID: 17356257</identifier><language>eng</language><publisher>Basel, Switzerland: S. Karger AG</publisher><subject>animal models ; Animals ; Bioavailability ; Bone density ; Bone Density - drug effects ; Bone mineral density ; bone mineralization ; bone resorption ; Computed tomography ; Cultured Milk Products ; cultured milk starters ; Female ; Fermentation ; fermented milk ; lactic acid bacteria ; Lactobacillus helveticus ; Milk ; Nutrition ; Oligopeptides - pharmacology ; Original Paper ; Osteoporosis - etiology ; Osteoporosis - prevention &amp; control ; ovariectomy ; Ovariectomy - adverse effects ; Peptides ; Probiotics ; Probiotics - pharmacology ; proline ; Rats ; Receiving waters ; Rodents</subject><ispartof>Annals of nutrition and metabolism, 2007-01, Vol.51 (1), p.65-74</ispartof><rights>2007 S. Karger AG</rights><rights>2007 S. Karger AG, Basel</rights><rights>Copyright 2007 S. Karger AG, Basel.</rights><rights>Copyright (c) 2007 S. 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The aim of the study was to determine whether VPP and L. helveticus fermented milk prevent bone loss in ovariectomized (OVX) rats. Methods: During the 12-week intervention study, the OVX rats received VPP in water or L. helveticus fermented milk, containing VPP. Sham-operated rats receiving water acted as controls. The trabecular and cortical bone mineral density were determined by peripheral quantitative computed tomography before the operation and at 4 and 12 weeks. The mechanical testing and ash weight analysis as well as the static and dynamic histomorphometrical parameters were assessed at the end of the intervention. Results: VPP given in water showed no clear effect on bone loss. L. helveticus fermented milk prevented bone loss by decreasing bone turnover and increasing the bone mineral density. Ovariectomy caused a 57% loss in the trabecular bone, which was attenuated by 16% in the L. helveticus group. Conclusions: VPP peptide did not prevent ovariectomy-induced bone loss, which could be due to the poor bioavailability of VPP from water solution. 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The aim of the study was to determine whether VPP and L. helveticus fermented milk prevent bone loss in ovariectomized (OVX) rats. Methods: During the 12-week intervention study, the OVX rats received VPP in water or L. helveticus fermented milk, containing VPP. Sham-operated rats receiving water acted as controls. The trabecular and cortical bone mineral density were determined by peripheral quantitative computed tomography before the operation and at 4 and 12 weeks. The mechanical testing and ash weight analysis as well as the static and dynamic histomorphometrical parameters were assessed at the end of the intervention. Results: VPP given in water showed no clear effect on bone loss. L. helveticus fermented milk prevented bone loss by decreasing bone turnover and increasing the bone mineral density. Ovariectomy caused a 57% loss in the trabecular bone, which was attenuated by 16% in the L. helveticus group. Conclusions: VPP peptide did not prevent ovariectomy-induced bone loss, which could be due to the poor bioavailability of VPP from water solution. L. helveticus fermented milk prevented bone loss, whether this is due to the VPP peptide cannot be concluded.</abstract><cop>Basel, Switzerland</cop><pub>S. Karger AG</pub><pmid>17356257</pmid><doi>10.1159/000100823</doi><tpages>10</tpages></addata></record>
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source MEDLINE; JSTOR Archive Collection A-Z Listing; Karger Journals; Alma/SFX Local Collection
subjects animal models
Animals
Bioavailability
Bone density
Bone Density - drug effects
Bone mineral density
bone mineralization
bone resorption
Computed tomography
Cultured Milk Products
cultured milk starters
Female
Fermentation
fermented milk
lactic acid bacteria
Lactobacillus helveticus
Milk
Nutrition
Oligopeptides - pharmacology
Original Paper
Osteoporosis - etiology
Osteoporosis - prevention & control
ovariectomy
Ovariectomy - adverse effects
Peptides
Probiotics
Probiotics - pharmacology
proline
Rats
Receiving waters
Rodents
title Effects of bioactive peptide, valyl-prolyl-proline (VPP), and Lactobacillus helveticus fermented milk containing VPP on bone loss in ovariectomized rats
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