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Soy Isoflavones and Bone Health: Focus on the RANKL/RANK/OPG Pathway. BIOMED RESEARCH INTERNATIONAL 2022; 2022:8862278. [PMID: 36330454 PMCID: PMC9626210 DOI: 10.1155/2022/8862278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 10/07/2022] [Indexed: 11/17/2022]
Abstract
Bone remodels via resorption and formation, two phenomena that continuously occur in bone turnover. The RANKL/RANK/OPG pathway is one of the several mechanisms that affect bone turnover. The RANKL/OPG ratio has a substantial role in bone resorption. An imbalance between formation and resorption is related to an increased RANKL/OPG balance. OPG, a member of this system, can bind to RANKL and suppress RANK-RANKL interaction, and subsequently, inhibit further osteoclastogenesis. The serum levels of RANKL and OPG in the bone microenvironment are vital for osteoclasts formation. The RANK/RANKL/OPG system plays a role in the pathogenesis of bone disorders. This system can be considered a new treatment target for bone disorders. Soy isoflavones affect the RANK/RANKL/OPG system through numerous mechanisms. Soy isoflavones decrease RANKL levels and increase OPG levels. Therefore, isoflavones improve bone metabolism and decrease bone resorption. Soy isoflavones decrease serum markers of bone resorption and improve bone metabolism. However, while the available data are promising, the results of several studies reported no change in RANKL and OPG levels with isoflavones supplementation. In this regard, current evidence is insufficient for conclusive approval of the efficacy of isoflavones on RANKL/RANK/OPG and further research, including animal and human studies, are needed to confirm the effect of soy isoflavones on the RANKL/RANK/OPG pathway. This study was a review of available evidence to determine the role of isoflavones in bone hemostasis and the RANK/RANKL/OPG pathway. The identification of the effects of isoflavones on the RANKL/RANK/OPG pathway directs future studies and leads to the development of effective treatment strategies for bone disorders.
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Kanadys W, Barańska A, Błaszczuk A, Polz-Dacewicz M, Drop B, Malm M, Kanecki K. Effects of Soy Isoflavones on Biochemical Markers of Bone Metabolism in Postmenopausal Women: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:5346. [PMID: 34067865 PMCID: PMC8156509 DOI: 10.3390/ijerph18105346] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/12/2021] [Accepted: 05/14/2021] [Indexed: 12/28/2022]
Abstract
This systematic review and meta-analysis of randomized controlled trials was performed to more completely assess potential changes in bone turnover marker levels in postmenopausal women during the intake of soy isoflavones. PubMed (Medline) and EMBASE were searched for relevant studies, and their quality was evaluated according to Cochrane criteria. The levels of markers were evaluated in a total of 1114 women who ingested mean daily doses of 98.2 mg (30.9 to 300) of soy isoflavones for 3 to 24 months, in comparison to those of 1081 subjects who used a placebo. Ten, eighteen, eight, and fourteen comparison studies were finally selected for an estimation of the effects on osteocalcin (OC), bone alkaline phosphatase (BAP), pyridinoline (PYD), and deoxypyridinoline (DPD), respectively. A summary of the results of intervention was as follows: 4.16%, 95% CI: -7.72-16.04, p = 0.49 for OC; 5.50%, 95% CI: -3.81-14.82, p = 0.25 for BAP; -12.09%, 95% CI: -25.37-1.20, p = 0.07 for PYD; and -7.48%, 95% CI: -15.37-0.41, p = 0.06 for DPD. The meta-analysis of the included studies revealed some statistically insignificant observations that soy isoflavones intake is associated with a trend in increased levels of OC and BAP, as well as a trend in reduced levels of PYD and DPD. Soy isoflavones may have a beneficial effect on bone formation markers, but this requires extensive multi-center research.
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Affiliation(s)
- Wiesław Kanadys
- Specialistic Medical Center “Czechów” in Lublin, 20-848 Lublin, Poland;
| | - Agnieszka Barańska
- Department of Medical Informatics and Statistics with E-learning Lab, Medical University of Lublin, 20-090 Lublin, Poland; (B.D.); (M.M.)
| | - Agata Błaszczuk
- Department of Virology with SARS Laboratory, Medical University of Lublin, 20-093 Lublin, Poland; (A.B.); (M.P.-D.)
| | - Małgorzata Polz-Dacewicz
- Department of Virology with SARS Laboratory, Medical University of Lublin, 20-093 Lublin, Poland; (A.B.); (M.P.-D.)
| | - Bartłomiej Drop
- Department of Medical Informatics and Statistics with E-learning Lab, Medical University of Lublin, 20-090 Lublin, Poland; (B.D.); (M.M.)
| | - Maria Malm
- Department of Medical Informatics and Statistics with E-learning Lab, Medical University of Lublin, 20-090 Lublin, Poland; (B.D.); (M.M.)
| | - Krzysztof Kanecki
- Department of Social Medicine and Public Health, Warsaw Medical University, 02-007 Warsaw, Poland;
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Lu M, Xie K, Huang K, Lu X, Lu L, Shi Y, Tang Y. Effects of soybean isoflavone on metabolism of rat osteoblasts and cytokines in vitro. J Food Sci 2020; 85:1302-1306. [PMID: 32144772 DOI: 10.1111/1750-3841.14986] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 10/20/2019] [Accepted: 11/05/2019] [Indexed: 12/19/2022]
Abstract
The effects and mechanisms of soybean isoflavone on osteoblast (OB) proliferation in vitro were investigated. Fifty female Wistar rats were randomly divided into five groups with 10 rats in each group. Rat OBs were separated and cultured. The first generation of OBs cultured for 48 hr at various concentrations of isoflavone were set as the experimental groups, the OBs exposed to estradiol (E2 ) culture were considered as positive control group. The biological characterization of OBs was investigated by phase contrast microscopy and alkaline phosphatase (ALP) histochemistry. The concentrations of interleukin (IL-1), osteoprotegerin (OPG), transforming growth factor (TGF), granulocyte-macrophage colony-stimulating factor (GM-CSF), and vascular endothelial growth factor (VEGF) in isoflavone culture solutions were determined. Proliferation rate of OBs was increased in experimental group comparing that in the blank group. ALP activity in experimental group was higher than that in blank group. No significant differences of ALP activity were observed between E2 culture group and isoflavone group at concentrations of 10-5 and 10-7 mM (P > 0.05). Furthermore, in the experimental groups at low isoflavone concentrations, the concentrations of OPG, TGF, and VEGF were increased and positively correlated with OB proliferation. However, the concentrations of IL-1, GM-CSF were decreased at higher concentration of isoflavone and were negatively correlated with OB proliferation. Soybean isoflavone could promote the growth and proliferation of rat OB, it might act as the stimulator of OPG, TGF, and VEGF pathway, and the inhibitor of IL-1, GM-CSF pathway as well.
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Affiliation(s)
- Minan Lu
- Dept. of Orthopedics, Affiliated Hospital of Youjiang Medical Univ. for Nationalities, Baise, China
| | - Kegong Xie
- Dept. of Orthopedics, Affiliated Hospital of Youjiang Medical Univ. for Nationalities, Baise, China
| | - Ke Huang
- Dept. of Orthopedics, Affiliated Hospital of Youjiang Medical Univ. for Nationalities, Baise, China
| | - Xianzhe Lu
- Dept. of Orthopedics, Affiliated Hospital of Youjiang Medical Univ. for Nationalities, Baise, China
| | - Lu Lu
- Dept. of Orthopedics, Affiliated Hospital of Youjiang Medical Univ. for Nationalities, Baise, China
| | - Yu Shi
- Dept. of Orthopedics, Affiliated Hospital of Youjiang Medical Univ. for Nationalities, Baise, China
| | - Yujin Tang
- Dept. of Orthopedics, Affiliated Hospital of Youjiang Medical Univ. for Nationalities, Baise, China
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Smeriglio A, Calderaro A, Denaro M, Laganà G, Bellocco E. Effects of Isolated Isoflavones Intake on Health. Curr Med Chem 2019; 26:5094-5107. [PMID: 28990503 DOI: 10.2174/0929867324666171006143047] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 09/16/2017] [Accepted: 09/21/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND Isoflavones are naturally occurring flavonoids, commonly found in the food consumed for centuries in the East-Asian population, characterized by a structure able to exert nonsteroidal estrogen-like activity on human cells. They have attracted researcher interest all around the word, following the results obtained in epidemiological and clinical studies. The involvement of isoflavones and their metabolites in various biological processes suggests that they can influence several metabolic pathways and can influence the gene expression at epigenetic level, involving effects that probably are due to early life exposure. They show positive health effects on several diseases, especially in the prevention of coronary heart and neurological diseases, hormone-related cancers, osteoporosis, and postmenopausal symptoms. METHODS We have performed a critical evaluation of available literature trough a structured search of bibliographic databases about isoflavones health promoting properties, risk assessment and mechanisms of action. In addition, we supplied useful information on their biochemical properties, sources and bioavailability. RESULTS Although these molecules have been the subjects of numerous researches, their role for the wellness of the human organism remains controversial. Moreover, there are substantial inconsistencies between the results obtained by epidemiologic studies conducted on Eastern population, which found high health promoting properties, and Western clinical trials, which found much less positive effects. CONCLUSION Further epidemiologic studies and well-designed prospective human studies are to determine the beneficial effects of isoflavones exposure, as well as establishing its safe therapeutic.
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Affiliation(s)
- Antonella Smeriglio
- Department of Chemical, University of Messina, Biological, Pharmaceutical and Environmental Sciences, Viale F. Stagno d'Alcontres 31, Messina, Italy
| | - Antonella Calderaro
- Department of Chemical, University of Messina, Biological, Pharmaceutical and Environmental Sciences, Viale F. Stagno d'Alcontres 31, Messina, Italy
| | - Marcella Denaro
- Department of Chemical, University of Messina, Biological, Pharmaceutical and Environmental Sciences, Viale F. Stagno d'Alcontres 31, Messina, Italy
| | - Giuseppina Laganà
- Department of Chemical, University of Messina, Biological, Pharmaceutical and Environmental Sciences, Viale F. Stagno d'Alcontres 31, Messina, Italy
| | - Ersilia Bellocco
- Department of Chemical, University of Messina, Biological, Pharmaceutical and Environmental Sciences, Viale F. Stagno d'Alcontres 31, Messina, Italy
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Soy isoflavones and cholecalciferol reduce inflammation, and gut permeability, without any effect on antioxidant capacity in irritable bowel syndrome: A randomized clinical trial. Clin Nutr ESPEN 2019; 34:50-54. [PMID: 31677711 DOI: 10.1016/j.clnesp.2019.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 09/01/2019] [Accepted: 09/08/2019] [Indexed: 01/28/2023]
Abstract
BACKGROUND & AIMS Irritable bowel syndrome (IBS) is a common gastrointestinal disorder that is more prevalent in women. Vitamin D deficiency and hormonal disorders are also prevalent in Iranian women, and may influence the severity of clinical outcomes mediated by microinflammation, oxidative stress and intestinal permeability pathways. Our objective was to investigate the effects of co-administration of soy and vitamin D on some inflammatory, antioxidant and gut permeability markers in women with IBS. METHODS In a randomized clinical trial, women (18-75 years of age) were randomly allocated into four groups to receive soy isoflavones (40 mg/day), cholecalciferol (50,000 IU/15 days), both soy isoflavones and cholecalciferol, or placebo for six weeks. The outcomes were plasma inflammatory markers, antioxidant status and fecal protease activity at week 0 and week 6. RESULTS After the intervention, plasma inflammatory markers and fecal protease activity were reduced significantly in all treatment groups compared to the placebo group; however, there was no significant effect on antioxidant status. CONCLUSION This study suggests combined supplementation of soy isoflavones and active vitamin D can improve some biochemical parameters regarding inflammation and intestinal permeability of IBS in women. TRIAL REGISTRATION Clinical.Trials.govNCT02026518.
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Rozek LS, Virani S, Bellile EL, Taylor JMG, Sartor MA, Zarins KR, Virani A, Cote C, Worden FP, Mark MEP, McLean SA, Duffy SA, Yoo GH, Saba NF, Shin DM, Kucuk O, Wolf GT. Soy Isoflavone Supplementation Increases Long Interspersed Nucleotide Element-1 (LINE-1) Methylation in Head and Neck Squamous Cell Carcinoma. Nutr Cancer 2019; 71:772-780. [PMID: 30862188 PMCID: PMC6513708 DOI: 10.1080/01635581.2019.1577981] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 11/13/2018] [Accepted: 12/26/2018] [Indexed: 12/20/2022]
Abstract
AIM Soy isoflavones have been suggested as epigenetic modulating agents with effects that could be important in carcinogenesis. Hypomethylation of LINE-1 has been associated with head and neck squamous cell carcinoma (HNSCC) development from oral premalignant lesions and with poor prognosis. To determine if neoadjuvant soy isoflavone supplementation could modulate LINE-1 methylation in HNSCC, we undertook a clinical trial. METHODS Thirty-nine patients received 2-3 weeks of soy isoflavone supplements (300 mg/day) orally prior to surgery. Methylation of LINE-1, and 6 other genes was measured by pyrosequencing in biopsy, resection, and whole blood (WB) specimens. Changes in methylation were tested using paired t tests and ANOVA. Median follow up was 45 months. RESULTS LINE-1 methylation increased significantly after soy isoflavone (P < 0.005). Amount of change correlated positively with days of isoflavone taken (P = 0.04). Similar changes were not seen in corresponding WB samples. No significant changes in tumor or blood methylation levels were seen in the other candidate genes. CONCLUSION This is the first demonstration of in vivo increases in tissue-specific global methylation associated with soy isoflavone intake in patients with HNSCC. Prior associations of LINE-1 hypomethylation with genetic instability, carcinogenesis, and prognosis suggest that soy isoflavones maybe potential chemopreventive agents in HNSCC.
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Affiliation(s)
- Laura S Rozek
- a University of Michigan , Ann Arbor , Michigan, USA
| | - Shama Virani
- a University of Michigan , Ann Arbor , Michigan, USA
| | | | | | | | | | - A Virani
- a University of Michigan , Ann Arbor , Michigan, USA
| | - C Cote
- a University of Michigan , Ann Arbor , Michigan, USA
| | | | | | | | | | - George H Yoo
- c Karmanos Cancer Institute , Wayne State University , Detroit , Michigan 48201, USA
| | - Nabil F Saba
- d Winship Cancer Institute , Emory University , Atlanta , Georgia, USA
| | - Dong M Shin
- d Winship Cancer Institute , Emory University , Atlanta , Georgia, USA
| | - Omer Kucuk
- d Winship Cancer Institute , Emory University , Atlanta , Georgia, USA
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Yang B, Jiang WD, Wu P, Liu Y, Zeng YY, Jiang J, Kuang SY, Tang L, Tang WN, Wang SW, Zhou XQ, Feng L. Soybean isoflavones improve the health benefits, flavour quality indicators and physical properties of grass carp (Ctenopharygodon idella). PLoS One 2019; 14:e0209570. [PMID: 30699129 PMCID: PMC6353095 DOI: 10.1371/journal.pone.0209570] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 12/07/2018] [Indexed: 12/14/2022] Open
Abstract
Health benefits, flavour quality indicators and physical properties were analysed after feeding grass carp graded concentrations of soybean isoflavones (SIF) (0, 25, 50, 75, 100 and 125 mg/kg) for 60 days. The results demonstrated that optimal dietary SIF supplementation improved the protein and total PUFA content, especially healthcare n-3 PUFA (C18: 3n-3, EPA and DHA), and increased the flavour-related free amino acid [especially umami amino acid] and 5'-inosine monophosphate content, improving the health benefits and flavour quality indicators in the muscle of grass carp. In addition, optimal dietary SIF supplementation (25 or 50 mg SIF/kg diet) enhanced some physical properties [water-holding capacity and tenderness] and increased the collagen content; however, it reduced cathepsin activity and apoptosis. SIF supplementation enhanced the glutathione content and the activity of antioxidant enzymes (except CuZnSOD) by regulating their gene expression. The gene expression could be regulated by NF-E2-related factor 2 (Nrf2) signalling in the muscle of grass carp. We demonstrated that optimal dietary SIF supplementation elevated the health benefits, flavour quality indicators and physical properties of fish muscle.
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Affiliation(s)
- Bo Yang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Wei-Dan Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, Sichuan, China
- Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu, China
| | - Pei Wu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, Sichuan, China
- Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu, China
| | - Yang Liu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, Sichuan, China
- Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu, China
| | - Yun-Yun Zeng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Jun Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Sheng-Yao Kuang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu, Sichuan, China
| | - Ling Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu, Sichuan, China
| | - Wu-Neng Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu, Sichuan, China
| | | | - Xiao-Qiu Zhou
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, Sichuan, China
- Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu, China
| | - Lin Feng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu, Sichuan, China
- Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, China
- Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu, China
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Wang T, Liu Y, Liu H, Li C, Wang Y. Auriculasin from Flemingia philippinensis roots shows good therapeutic indexes on hyperactive behavior in zebrafish. Biochem Biophys Res Commun 2018; 503:1254-1259. [DOI: 10.1016/j.bbrc.2018.07.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 07/07/2018] [Indexed: 11/28/2022]
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Torre E. Molecular signaling mechanisms behind polyphenol-induced bone anabolism. PHYTOCHEMISTRY REVIEWS : PROCEEDINGS OF THE PHYTOCHEMICAL SOCIETY OF EUROPE 2017; 16:1183-1226. [PMID: 29200988 PMCID: PMC5696504 DOI: 10.1007/s11101-017-9529-x] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 08/20/2017] [Indexed: 05/08/2023]
Abstract
For millennia, in the different cultures all over the world, plants have been extensively used as a source of therapeutic agents with wide-ranging medicinal applications, thus becoming part of a rational clinical and pharmacological investigation over the years. As bioactive molecules, plant-derived polyphenols have been demonstrated to exert many effects on human health by acting on different biological systems, thus their therapeutic potential would represent a novel approach on which natural product-based drug discovery and development could be based in the future. Many reports have provided evidence for the benefits derived from the dietary supplementation of polyphenols in the prevention and treatment of osteoporosis. Polyphenols are able to protect the bone, thanks to their antioxidant properties, as well as their anti-inflammatory actions by involving diverse signaling pathways, thus leading to bone anabolic effects and decreased bone resorption. This review is meant to summarize the research works performed so far, by elucidating the molecular mechanisms of action of polyphenols in a bone regeneration context, aiming at a better understanding of a possible application in the development of medical devices for bone tissue regeneration.
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Affiliation(s)
- Elisa Torre
- Nobil Bio Ricerche srl, Via Valcastellana, 26, 14037 Portacomaro, AT Italy
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Zheng X, Lee SK, Chun OK. Soy Isoflavones and Osteoporotic Bone Loss: A Review with an Emphasis on Modulation of Bone Remodeling. J Med Food 2016; 19:1-14. [PMID: 26670451 PMCID: PMC4717511 DOI: 10.1089/jmf.2015.0045] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 10/21/2015] [Indexed: 12/21/2022] Open
Abstract
Osteoporosis is an age-related disorder that affects both women and men, although estrogen deficiency induced by menopause accelerates bone loss in older women. As the demographic shifts to a more aged population, a growing number of men and women will be afflicted with osteoporosis. Since the current drug therapies available have multiple side effects, including increased risk of developing certain types of cancer or complications, a search for potential nonpharmacologic alternative therapies for osteoporosis is of prime interest. Soy isoflavones (SI) have demonstrated potential bone-specific effects in a number of studies. This article provides a systematic review of studies on osteoporotic bone loss in relation to SI intake from diet or supplements to comprehensively explain how SI affect the modulation of bone remodeling. Evidence from epidemiologic studies supports that dietary SI attenuate menopause-induced osteoporotic bone loss by decreasing bone resorption and stimulating bone formation. Other studies have also illustrated that bone site-specific trophic and synergistic effects combined with exercise intervention might contribute to improve the bioavailability of SI or strengthen the bone-specific effects. To date, however, the effects of dietary SI on osteoporotic bone loss remain inconclusive, and study results vary from study to study. The current review will discuss the potential factors that result in the conflicting outcomes of these studies, including dosages, intervention materials, study duration, race, and genetic differences. Further well-designed studies are needed to fully understand the underlying mechanism and evaluate the effects of SI on osteoporosis in humans.
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Affiliation(s)
- Xi Zheng
- Department of Nutritional Sciences, University of Connecticut, Storrs, Connecticut, USA
| | - Sun-Kyeong Lee
- Center on Aging, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Ock K. Chun
- Department of Nutritional Sciences, University of Connecticut, Storrs, Connecticut, USA
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New isoflavones from Gynandriris sisyrinchium and their antioxidant and cytotoxic activities. Fitoterapia 2015; 107:15-21. [DOI: 10.1016/j.fitote.2015.09.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Revised: 09/19/2015] [Accepted: 09/21/2015] [Indexed: 12/30/2022]
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12
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Chiang SS, Pan TM. Beneficial effects of phytoestrogens and their metabolites produced by intestinal microflora on bone health. Appl Microbiol Biotechnol 2013; 97:1489-500. [PMID: 23318837 DOI: 10.1007/s00253-012-4675-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Revised: 12/18/2012] [Accepted: 12/19/2012] [Indexed: 01/01/2023]
Abstract
Phytoestrogens are a class of bioactive compounds derived from plants and exert various estrogenic and antiestrogenic effects. Estrogen deficiency osteoporosis has become a serious problem in elderly women. The use of ovariectomized (OVX) rat or mice models to simulate the postmenopausal condition is well established. This review aimed to clarify the sources, biochemistry, absorption, metabolism, and mode of action of phytoestrogens on bone health in intervention studies. In vitro, phytoestrogens promote protein synthesis, osteoprotegerin/receptor activation of nuclear factor-kappa B ligand ratio, and mineralization by osteoblast-like cells (MC3T3-E1). In the OVX murine model, administration of phytoestrogens can inhibit differentiation and activation of osteoclasts, expression of tartrate-resistant acid phosphatase, and secretion of pyridinoline compound. Phytoestrogens also enhance bone formation and increase bone mineral density and levels of alkaline phosphatase, osteocalcin, osteopontin, and α1(I) collagen. Results of mechanistic studies have indicated that phytoestrogens suppress the rate of bone resorption and enhance the rate of bone formation.
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Affiliation(s)
- Shen-Shih Chiang
- Department of Food Science and Biotechnology, National Chung Hsing University, No. 250 Kuokuang Road, Taichung 40227, Taiwan
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Aoyama I, Yaegaki K, Calenic B, Ii H, Ishkitiev N, Imai T. The role of p53 in an apoptotic process caused by an oral malodorous compound in periodontal tissues: a review. J Breath Res 2012; 6:017104. [DOI: 10.1088/1752-7155/6/1/017104] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Aoyama I, Calenic B, Imai T, Ii H, Yaegaki K. Oral malodorous compound causes caspase-8 and -9 mediated programmed cell death in osteoblasts. J Periodontal Res 2011; 47:365-73. [DOI: 10.1111/j.1600-0765.2011.01442.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Xiang MX, Su HW, Hu J, Yan YJ. Stimulative effects of Polygonum amplexicaule var. sinense on osteoblastic MC3T3-E1 cells. PHARMACEUTICAL BIOLOGY 2011; 49:1091-1096. [PMID: 21595574 DOI: 10.3109/13880209.2011.568507] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
CONTEXT Polygonum amplexicaule D. Don var. sinense Forb. (Polygonaceae) (PAF) is a well known traditional herb used to treat some diseases, such as fractures, rheumatoid arthritis, muscle injury, and pain. However, its pharmacological mechanism of promoting the healing of fractures is still unknown. OBJECTIVE The present study was designed to investigate the effects of PAF ethanol extracts on the proliferation and differentiation of osteoblastic MC3T3-E1 cell in vitro, thereby to illuminate the pharmacological mechanism to promote the healing of fractures. MATERIALS AND METHODS The effects of PAF ethanol extracts on MC3T3-E1 cell proliferation and differentiation were detected by using CCK-8, cell cycle, alkaline phosphatase (ALP), and prostaglandin E(2) (PGE(2)) assays in vitro. RESULTS The results showed that PAF ethanol extracts significantly stimulated cell proliferation at 0.1-100 μg/mL and the proportion of cells in S-phase increased from 16.33 to 27.29% in osteoblastic MC3T3-E1 cells. Moreover, PAF ethanol extracts increased ALP expression in MC3T3-E1 cells at the concentration from 0.1 to 100 μg/mL and inhibited PGE(2) production induced by TNF-α in osteoblasts at the concentrations ranging from 10 to 100 μg/mL in MC3T3-E1 osteoblasts. DISCUSSION AND CONCLUSION These results indicated that PAF directly stimulates cell proliferation and differentiation of osteoblasts; therefore, this study preliminarily explored the pharmacological mechanism of PAF to promote the healing of bone rheumatism and various fractures.
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Affiliation(s)
- Mei-Xian Xiang
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, P.R. China
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Salari Sharif P, Nikfar S, Abdollahi M. Prevention of bone resorption by intake of phytoestrogens in postmenopausal women: a meta-analysis. AGE (DORDRECHT, NETHERLANDS) 2011; 33:421-431. [PMID: 20827510 PMCID: PMC3168592 DOI: 10.1007/s11357-010-9180-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Accepted: 08/25/2010] [Indexed: 05/29/2023]
Abstract
Phytoestrogens as selective estrogen receptor modulators like compounds may consider as a therapeutic option in osteoporosis. In this regard, the effect of phytoestrogens on bone biomarkers was examined in several trials which their results are controversial. We aimed this meta-analysis to evaluate the net effect of phytoestrogens on bone markers. A thorough search was conducted from 2000 to 2010 in English articles. All randomized clinical trials were reviewed, and finally, 11 eligible randomized clinical trials were selected for meta-analysis. Totally 1,252 postmenopausal women were enrolled in the study by considering the changes of pyridinoline (Pyd), desoxypyridinoline (Dpyd), bone alkaline phosphatase, and osteocalcin concentrations in urine and serum after phytoestrogens consumption. The urine Pyd and Dpyd levels decreased significantly in phytoestrogens consumers. Effect size and effect size for weighted mean difference of urine Pyd levels showed -1.229171 (95% confidence interval (CI) = -1.927639 to -0.530703) and -9.780623 (95% CI = -14.240401 to -5.320845), respectively, a significant results in comparison to control group and significant results for Dpyd -0.520132 (95% CI = -0.871988 to -0.168275) and -0.818582 (95% CI = -1.247758 to -0.389407), respectively. Meta-analysis indicates that phytoestrogens intake can prevent bone resorption, but its benefits on bone formation are not significant. This favorable effect was observed in low doses and in at least 3 weeks of phytoestrogens intake.
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Affiliation(s)
- Pooneh Salari Sharif
- Medical Ethics and History of Medicine Research Center, Tehran University of Medical Sciences, 16 Azar Ave, Tehran, Iran.
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17
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Emodin-8-O-β-D-glucoside from Polygonum amplexicaule D. Don var. sinense Forb. promotes proliferation and differentiation of osteoblastic MC3T3-E1 cells. Molecules 2011; 16:728-37. [PMID: 21245807 PMCID: PMC6259125 DOI: 10.3390/molecules16010728] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2010] [Revised: 01/07/2011] [Accepted: 01/17/2011] [Indexed: 11/28/2022] Open
Abstract
Polygonum amplexicaule D. Don var. sinense Forb. (Polygonaceae) (PAF) is a famous traditional herb used to treat fractures, rheumatoid arthritis, muscle injury and pain. The present study was designed to investigate a PAF derived-chemical compound emodin-8-O-β-d-glucoside (EG) on the proliferation and differentiation of osteoblastic MC3T3-E1 cell in vitro. A compound was isolated from PAF extract by HPLC and identified as emodin-8-O-β-d-glucoside (EG) by spectroscopic methods. EG significantly promoted cell proliferation at 0.1–100 ng/mL, and increased the cell proportion in S-phase from 16.34% to 32.16%. Moreover, EG increased alkaline phosphatase (ALP) expression in MC3T3-E1 cells at the concentration from 0.1 to 100 ng/mL and inhibited PGE2 production induced by TNF-α in osteoblasts at the concentrations ranging from 10–100 ng/mL, suggesting that cell differentiation was induced in MC3T3-E1 osteoblasts. Taken together, these results indicated compound EG directly stimulated cell proliferation and differentiation of osteoblasts, therefore this study preliminarily explored the pharmacological mechanism of PAF to promote the healing of bone rheumatism and various fractures.
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Chen J, Saggar JK, Ward WE, Thompson LU. Effects of flaxseed lignan and oil on bone health of breast-tumor-bearing mice treated with or without tamoxifen. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2011; 74:757-768. [PMID: 21541878 DOI: 10.1080/15287394.2011.567950] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Previous studies showed that flaxseed lignan (secoisolariciresinol diglucoside, SDG) and oil (FO) inhibit established breast tumor growth in athymic mice with or without tamoxifen (TAM) treatment. TAM was found to increase bone mineral content (BMC) and density (BMD) in breast cancer patients. It is not known whether SDG or FO alone or combined with TAM affects bone health. Hence, the effects of SDG and FO, alone or in combination, on BMC, BMD, and biomechanical bone strength in ovariectomized athymic mice with established human breast tumors (MCF-7) treated with or without TAM were studied. In a factorial design, mice were divided into four non-TAM and four TAM groups. Each group consisted of mice fed a basal diet (BD), SDG (1 g/kg), FO (38.5 g/kg) or SDG + FO (combination) diets. The TAM group had TAM implants that provide a 5-mg TAM dose released over 60 d. TAM exerted an overall significant effect in increasing BMC, BMD, and biomechanical strength in femurs and lumbar vertebra. Without TAM treatment, SDG produced significant lower femur BMD (6%) while FO produced lower vertebrae BMC (8%) and BMD (6%). With TAM treatment, SDG and FO did not exert an effect on BMC and BMD at the femur or vertebra. SDG and FO produced no marked effect on biomechanical bone strength with or without TAM treatment. In conclusion, FS components did not significantly attenuate the positive effects on bone induced by TAM in this model system, indicating no apparent adverse effects on bone health.
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Affiliation(s)
- Jianmin Chen
- Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
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19
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Winzer M, Rauner M, Pietschmann P. Glycitein decreases the generation of murine osteoclasts and increases apoptosis. Wien Med Wochenschr 2010; 160:446-51. [DOI: 10.1007/s10354-010-0811-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2010] [Accepted: 03/21/2010] [Indexed: 10/19/2022]
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20
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Wegiel B, Persson JL. Effect of a novel botanical agent Drynol Cibotin on human osteoblast cells and implications for osteoporosis: promotion of cell growth, calcium uptake and collagen production. Phytother Res 2009; 24 Suppl 2:S139-47. [DOI: 10.1002/ptr.3026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Nakada M, Imai M, Suzuki I. Impact of ethanol addition on the solubility of various soybean isoflavones in supercritical carbon dioxide and the effect of glycoside chain in isoflavones. J FOOD ENG 2009. [DOI: 10.1016/j.jfoodeng.2009.06.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Cannavà C, Crupi V, Ficarra P, Guardo M, Majolino D, Mazzaglia A, Stancanelli R, Venuti V. Physico-chemical characterization of an amphiphilic cyclodextrin/genistein complex. J Pharm Biomed Anal 2009; 51:1064-8. [PMID: 20036091 DOI: 10.1016/j.jpba.2009.11.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2009] [Revised: 11/24/2009] [Accepted: 11/24/2009] [Indexed: 10/20/2022]
Abstract
Specific recognition of cell-targeting systems as host-carriers modified with receptor targeting groups, is a major ambition in the application of supramolecular science to medicine and life science. Genistein (Gen), an isoflavone belonging to the class of phytoestrogens, is of great interest because it has been considered as potential remedy for many kinds of disease. In this work, genistein in aqueous medium and in the presence of an host nanocarrier as amphiphilic cyclodextrin (CyD) modified in the upper rim with oligoethylene hydroxyl groups [(2-oligo(ethyleneoxide)-6-hexylthio)-beta-CyD, SC6OH] at 1:1 molar ratio, has been firstly investigated by UV-vis measurements coupled with circular dichroism data, in order to characterize the drug/macrocycle binding affinity through the formation of the complex. Furthermore, FTIR-ATR technique has been used to detect the complex formation in solid phase and to characterize the functional groups responsible of the solid Gen/SC6OH complex stability. The infrared absorbance spectra of the complex, collected in a wide range of wavenumber and around the physiological temperature, have been analysed and compared with the spectra of the pure compounds and their physical mixture. By monitoring the most significant changes in the shape and position of the absorbance bands of the Gen functional groups, we showed that the formation and/or modification of polar bonds play the main role in the interaction of the drug with the amphiphilic CyD. From the results, Gen is shown to be entangled in SC6OH nanoaggregates, establishing hydrogen bonding with the hydrophilic PEG chains.
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Affiliation(s)
- C Cannavà
- Dipartimento Farmaco-Chimico, Università di Messina, Viale Annunziata, 98168 Messina, Italy
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23
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Crupi V, Majolino D, Paciaroni A, Stancanelli R, Venuti V. Influence of the "host-guest" interactions on the mobility of genistein/beta-cyclodextrin inclusion complex. J Phys Chem B 2009; 113:11032-8. [PMID: 19603804 DOI: 10.1021/jp810546h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Inclusion complexes of cyclodextrins with nonpolar drugs are a topic of current interest in pharmaceutical science, because they increase the aqueous solubility, chemical stability and bioavailability of poorly water-soluble drugs. By means of elastic incoherent neutron scattering (EINS) technique on the backscattering spectrometer IN13, we measured, in the 150-340 K temperature range, the mean square displacements (MSD) of hydrogen atoms derived from elastic spectra of inclusion complex of beta-cyclodextrin (beta-CyD) with genistein (Gen), a phytoestrogen of great interest for its antioxidant, anticarcinogenic and antiosteoporotic activities. The mobility of the complex has been compared with the single components and the physical mixture. The elastic intensity has been interpreted in terms of the double-well model in the whole temperature range. In the case of Gen, a mainly vibrational dynamics is revealed, while for the other samples, the elastic intensity becomes non-Gaussian above a temperature T(d) congruent with 220-230 K. This dynamical activation, which is represented by an Arrhenius trend, seems to be promoted by the crystallization water molecules. The dynamics of the Gen/beta-CyD inclusion complex is restricted with respect to the physical mixture, due to the action of specific "host-guest" interactions upon complexation. Finally, the dynamical response of our systems to temperature is put in relationship with their thermal stability.
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Affiliation(s)
- Vincenza Crupi
- Department of Physics, University of Messina and Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, C.da Papardo, S.ta Sperone 31, P.O. Box 55, 98166 S. Agata, Messina, Italy
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24
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Zhu S, Hong M, Liu C, Pei Y. Application of Box-Behnken design in understanding the quality of genistein self-nanoemulsified drug delivery systems and optimizing its formulation. Pharm Dev Technol 2009; 14:642-9. [DOI: 10.3109/10837450902882385] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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25
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Linares GR, Xing W, Govoni KE, Chen ST, Mohan S. Glutaredoxin 5 regulates osteoblast apoptosis by protecting against oxidative stress. Bone 2009; 44:795-804. [PMID: 19442627 PMCID: PMC4683083 DOI: 10.1016/j.bone.2009.01.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2008] [Revised: 11/19/2008] [Accepted: 01/05/2009] [Indexed: 11/17/2022]
Abstract
There is now increasing evidence which suggests an important role for reactive oxygen species (ROS) in the pathogenesis of osteoporosis. However, little is known on the molecular components of the oxidative stress pathway or their functions in bone. In this study, we evaluated the role and mechanism of action of glutaredoxin (Grx) 5, a protein that is highly expressed in bone. Osteoblasts were transfected with Grx5 siRNA and treated with hydrogen peroxide (H(2)O(2)). Grx5 siRNA treatment increased apoptosis while Grx5 overexpression protected MC3T3-E1 cells against H(2)O(2) induced apoptosis and ROS formation. Grx5 deficiency results in impaired biogenesis of Fe-S cluster in yeast. Accordingly, activity of mitochondrial aconitase, whose activity is dependent on Fe-S cluster, decreased in Grx5 siRNA treated cells. Since reduced formation of Fe-S cluster would lead to increased level of free iron, a competitive inhibitor of manganese superoxide dismutase (MnSOD), we measured MnSOD activity in Grx5 deficient osteoblasts and found MnSOD activity was significantly reduced. The consequence of long term inhibition of Grx5 on osteoblast apoptosis was evaluated using lentiviral shRNA technology. Grx5 shRNA cells exhibited higher caspase activity and cardiolipin oxidation in the presence of H(2)O(2). MnSOD activity was rescued by the addition of MnCl(2) to Grx5 shRNA osteoblasts in the presence of H(2)O(2). Our findings are consistent with the hypothesis that Grx5 is an important determinant of osteoblast apoptosis and acts via a molecular pathway that involves regulation of ROS production, cardiolipin oxidation, caspase activity, Fe-S cluster formation, and MnSOD activity.
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Affiliation(s)
- Gabriel R Linares
- Musculoskeletal Disease Center, Jerry L Pettis Memorial Veterans Affairs Medical Center, Loma Linda, CA 92357, USA
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26
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Chuang WL, Haugland Ø, Pan BS, Evensen Ø. Isoflavone-rich extracts from wooly glycine Glycine tomentella inhibits LPS-induced TNF-α expression in a macrophage cell line of Atlantic salmon (Salmo salar L.). Mol Immunol 2008; 45:3956-64. [DOI: 10.1016/j.molimm.2008.06.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2008] [Revised: 06/10/2008] [Accepted: 06/13/2008] [Indexed: 12/29/2022]
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27
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Abstract
Due to their ability to mimic the actions of mammalian estrogens, soy phytoestrogens have been proposed as potential therapeutic agents to aid in preventing postmenopausal bone loss. In vitro, phytoestrogens promote osteoblastogenesis and inhibit osteoclastogenesis. Although a relatively large number of intervention studies have been undertaken in animals and humans, the efficacy of phytoestrogens as bone-protective agents in vivo remains unclear. Differences in the bioactivities of individual phytoestrogens, differences in phytoestrogen metabolism and bioavailability within different study populations, and imprecise reporting of the dose of phytoestrogens administered in intervention studies may have contributed to the disparity in study findings.
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Affiliation(s)
- Raewyn C Poulsen
- Institute of Food Nutrition and Human Health, Massey University, Palmerston North, New Zealand
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28
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Son YO, Kook SH, Choi KC, Jang YS, Choi YS, Jeon YM, Kim JG, Hwang HS, Lee JC. Quercetin accelerates TNF-alpha-induced apoptosis of MC3T3-E1 osteoblastic cells through caspase-dependent and JNK-mediated pathways. Eur J Pharmacol 2007; 579:26-33. [PMID: 17988664 DOI: 10.1016/j.ejphar.2007.10.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2007] [Revised: 09/05/2007] [Accepted: 10/04/2007] [Indexed: 01/05/2023]
Abstract
The bioflavonoid, quercetin, is believed to inhibit bone loss by regulating many systemic and local factors including hormones and cytokines. However, our previous findings revealed that quercetin did not inhibit but facilitate the tumor necrosis factor (TNF)-alpha-mediated apoptosis of MC3T3-E1 osteoblastic cells. Therefore, this study was carried out to examine the cellular mechanisms for how quercetin accelerates TNF-alpha-mediated apoptosis, and to determine whether the accelerating effect of quercetin is a general effect in osteoblastic cells. Quercetin promoted the TNF-alpha-induced apoptosis of MC3T3-E1 cells through both the mitochondrial-mediated and caspase-dependent mechanisms. Quercetin also augmented the TNF-alpha-mediated apoptosis by activating c-Jun N-terminal kinase (JNK) with the attendant activation of activator protein-1, where the nuclear translocation of c-Jun protein appeared to be a critical event responsible for the accelerating action of quercetin. However, TNF-alpha-mediated apoptosis and its acceleration by quercetin were not observed in primary osteoblasts. These results strongly suggest that quercetin accelerates TNF-alpha-mediated apoptosis of osteoblasts through caspase-dependent and JNK-mediated pathways, and that the cellular responses of osteoblasts to TNF-alpha and/or quercetin might differ according to their origins.
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Affiliation(s)
- Young-Ok Son
- Laboratory of Cell Biology in Department of Orthodontics and Institute of Oral Biosciences, Chonbuk National University, Jeonju 561-756, Republic of Korea
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29
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Crupi V, Ficarra R, Guardo M, Majolino D, Stancanelli R, Venuti V. UV–vis and FTIR–ATR spectroscopic techniques to study the inclusion complexes of genistein with β-cyclodextrins. J Pharm Biomed Anal 2007; 44:110-7. [PMID: 17379467 DOI: 10.1016/j.jpba.2007.01.054] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2006] [Revised: 01/29/2007] [Accepted: 01/31/2007] [Indexed: 10/23/2022]
Abstract
The effect of beta-cyclodextrin (beta-CyD), (2-hydroxypropyl)-beta-cyclodextrin (HP-beta-CyD) and methyl-beta-cyclodextrin (Me-beta-CyD) complexation on the UV absorption of genistein (Gen) was studied in pure water. A phase solubility study was performed, according to the method reported by Higuchi and Connors, to evaluate the changes of isoflavone in the complexation state and the obtained diagrams suggested that it forms complexes with a stoichiometry of 1:1. Then, the solid complexes of genistein with these macrocycles in 1:1 molar ratio were prepared by the co-precipitation method and characterized by FTIR absorption spectroscopy in ATR geometry. The host-guest interactions have been evidenced by monitoring, in the FTIR-ATR spectra, the changes in some guest molecule bands relative to those observed in the spectra of the 1:1 physical mixtures and complexes. In particular, for the high-frequency O-H stretching band, a quantitative vibrational assignment of the observed sub-bands has been made. From the results, the inclusion phenomena have been discussed.
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Affiliation(s)
- V Crupi
- Dipartimento di Fisica, Facoltà di Scienze MM.FF.NN., Università di Messina, C.da Papardo, S.ta Sperone 31, P.O. Box 55, 98166 S. Agata, Messina, Italy
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30
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Omoigui S. The Interleukin-6 inflammation pathway from cholesterol to aging--role of statins, bisphosphonates and plant polyphenols in aging and age-related diseases. Immun Ageing 2007; 4:1. [PMID: 17374166 PMCID: PMC1845171 DOI: 10.1186/1742-4933-4-1] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2007] [Accepted: 03/20/2007] [Indexed: 12/25/2022]
Abstract
We describe the inflammation pathway from Cholesterol to Aging. Interleukin 6 mediated inflammation is implicated in age-related disorders including Atherosclerosis, Peripheral Vascular Disease, Coronary Artery Disease, Osteoporosis, Type 2 Diabetes, Dementia and Alzheimer's disease and some forms of Arthritis and Cancer. Statins and Bisphosphonates inhibit Interleukin 6 mediated inflammation indirectly through regulation of endogenous cholesterol synthesis and isoprenoid depletion. Polyphenolic compounds found in plants, fruits and vegetables inhibit Interleukin 6 mediated inflammation by direct inhibition of the signal transduction pathway. Therapeutic targets for the control of all the above diseases should include inhibition of Interleukin-6 mediated inflammation.
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Affiliation(s)
- Sota Omoigui
- Division of Inflammation and Pain Medicine, LA Pain Clinic, 4019 W Rosecrans Ave, Los Angeles, CA 90250, USA.
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31
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Figuero E, Soory M, Cerero R, Bascones A. Oxidant/antioxidant interactions of nicotine, Coenzyme Q10, Pycnogenol and phytoestrogens in oral periosteal fibroblasts and MG63 osteoblasts. Steroids 2006; 71:1062-72. [PMID: 17045317 DOI: 10.1016/j.steroids.2006.09.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2006] [Revised: 09/04/2006] [Accepted: 09/05/2006] [Indexed: 11/22/2022]
Abstract
BACKGROUND There is a growing awareness that oxidative stress may play a role in periodontal disease. The aim of this investigation was to evaluate potential oxidant/antioxidant interactions of nicotine with antioxidants (Coenzyme Q10 (CoQ), Pycnogenol and phytoestrogens in a cell culture model. METHODS Duplicate incubations of human periosteal fibroblasts and osteoblasts were performed with 14C-testosterone as substrate, in the presence or absence of CoQ (20 microg/ml), Pycnogenol (150 microg/ml), and phytoestrogens (10 and 40 microg/ml), alone and in combination with nicotine (250 microg/ml). At the end of a 24-h incubation period, the medium was solvent extracted and testosterone metabolites were separated by thin-layer chromatography and quantified using a radioisotope scanner. RESULTS The incubations of osteoblasts and periosteal fibroblasts with CoQ, Pycnogenol or phytoestrogens stimulated the synthesis of the physiologically active androgen DHT, while the yields of DHT were significantly reduced in response to nicotine compared to control values (p<0.001 for phytoestrogens). The combination of nicotine with CoQ, Pycnogenol or phytoestrogens increased the yields of DHT compared with incubation with nicotine alone in both cell types. CONCLUSION This investigation suggests that the catabolic effects of nicotine could be reversed by the addition of antioxidants such as CoQ or Pycnogenol and phytoestrogens.
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Affiliation(s)
- Elena Figuero
- Department of Periodontology, Faculty of Dentistry, University Complutense of Madrid, Spain.
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32
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Bandyopadhyay S, Lion JM, Mentaverri R, Ricupero DA, Kamel S, Romero JR, Chattopadhyay N. Attenuation of osteoclastogenesis and osteoclast function by apigenin. Biochem Pharmacol 2006; 72:184-97. [PMID: 16750176 DOI: 10.1016/j.bcp.2006.04.018] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2006] [Revised: 04/17/2006] [Accepted: 04/17/2006] [Indexed: 10/24/2022]
Abstract
The physiological effects of the flavone, apigenin on bone cells were studied. We first show that apigenin inhibits tumor necrosis factor alpha (TNFalpha)- and interferon gamma (IFNgamma)-induced secretion of several osteoclastogenic cytokines from MC3T3-E1 mouse calvarial osteoblast cell line. Ligands of the TNF receptor family constitute the most potent osteoclastic cytokines. In MC3T3-E1 cells, apigenin dose-dependently (from 5 to 20 microM) inhibits TNFalpha-induced production of the osteoclastogenic cytokines, IL-6 (interleukin-6), RANTES (regulated upon activation, normal T cell-expressed and -secreted), monocyte chemoattractant protein-1 (MCP-1) and MCP-3. In addition, apigenin inhibits IFNgamma-stimulated secretion of monokines, CXCL-9, and -10 in MC3T3-E1 cells. Next, we show that apigenin strongly inhibits differentiation of 3T3-L1 preadipocytes to adipocytes with attendant inhibition of adipocyte differentiation-induced IL-6, MCP-1, and leptin production. Inhibition of adipogenic differentiation by apigenin could be due to induction of osteogensis as it robustly upregulates mRNA levels of bone morphogenetic protein-6 (BMP-6). Finally, the presence of apigenin inhibited osteoclast differentiation from the RAW 264.7 cell line by reducing receptor activator of nuclear factor kappa ligand (RANKL)-induced expression of tartrate-resistant acid phosphatase (TRAP), RANK, and calcitonin receptor but not CCR1, resulting in the inhibition of multinucleated osteoclast formation. Similarly, apigenin inhibited expression of the osteoclast differentiation markers TRAP, RANK, and c-Fms in osteoclast precursor cells obtained from mouse bone marrow following treatment with RANKL and macrophage colony stimulating factor (MCSF). Furthermore, apigenin induced apoptosis of mature osteoclasts obtained from rabbit long bone and inhibited bone resorption. In all instances, a structurally related compound, flavone had no significant effect. These data suggest that apigenin has multiple effects on all three bone cells that could prevent bone loss in vivo.
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Affiliation(s)
- Sanghamitra Bandyopadhyay
- Genetics and Aging Research Unit, Psychiatry Department, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
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Son YO, Kook SH, Choi KC, Jang YS, Jeon YM, Kim JG, Lee KY, Kim J, Chung MS, Chung GH, Lee JC. Quercetin, a bioflavonoid, accelerates TNF-α-induced growth inhibition and apoptosis in MC3T3-E1 osteoblastic cells. Eur J Pharmacol 2006; 529:24-32. [PMID: 16316652 DOI: 10.1016/j.ejphar.2005.10.041] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2005] [Revised: 10/18/2005] [Accepted: 10/25/2005] [Indexed: 10/25/2022]
Abstract
The bioflavonoid quercetin is believed to play an important role in preventing bone loss by affecting osteoclastogenesis and regulating many systemic and local factors including hormones and cytokines. This study examined how quercetin acts on tumor necrosis factor-alpha (TNF-alpha)-mediated growth inhibition and apoptosis in MC3T3-E1 osteoblastic cells. Tritium uptake assay showed that a quercetin treatment accelerated TNF-alpha-induced inhibition of DNA synthesis in the cells in a dose-dependent manner. Both the 3-(4,5-dimethylthiazol-2yl-)-2,5-diphenyl tetrazolium bromide and trypan blue staining assays also showed the quercetin-mediated facilitation of TNF-alpha-induced cytotoxicity in the cells. Apoptosis assays revealed an accelerating effect of quercetin on TNF-alpha-induced apoptosis in MC3T3-E1 cells. In addition, Fas activation and poly (ADP ribose) polymerase cleavage are thought to be closely associated with the TNF-alpha-induced apoptosis and its acceleration by the quercetin treatment in the cells. Collectively, this study showed that quercetin accelerates the TNF-alpha-induced growth inhibition and apoptosis in MC3T3-E1 osteoblastic cells.
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Affiliation(s)
- Young-Ok Son
- Research Center of Bioactive Materials, Chonbuk National University, Chonju 561-756, South Korea
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34
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Chun HS, Chang HJ, Choi EH, Kim HJ, Ku KH. Molecular and absorption properties of 12 soy isoflavones and their structure-activity relationship with selected biological activities. Biotechnol Lett 2005; 27:1105-11. [PMID: 16132860 DOI: 10.1007/s10529-005-8457-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2004] [Revised: 05/23/2005] [Accepted: 05/24/2005] [Indexed: 11/26/2022]
Abstract
Three biological activities of 12 soy isoflavones were investigated in terms of the structure-activity relationship. Seven molecular descriptors and one absorption predictor were significantly related to the inhibition of cytochrome P4501 activity in HepG2 cells by soy isoflavones, yielding water solubility [correlation coefficient (gamma)=-0.779] and hydrophobicity (gamma=0.718) as more relevant molecular properties. By contrast, the inducing activities of 12 soy isoflavones both on quinone reductase in HepG2 cells and proliferation of the osteoblastic MG-63 cells demonstrated significant correlation to the hydroxyl and methoxyl substituents on the isoflavone skeleton (p<0.01).
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Affiliation(s)
- Hyang Sook Chun
- Korea Food Research Institute, 463-746, Sungnam, Kyonggi-do, Korea.
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Soung DY, Chung HY, Rhee SH, Park KY. Age-Related Male Osteoporosis, and Soy, Its Alternative Therapy - Review-. Prev Nutr Food Sci 2005. [DOI: 10.3746/jfn.2005.10.3.298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Wang TC, Chen IL, Lu CM, Kuo DH, Liao CH. Synthesis, and Cytotoxic and Antiplatelet Activities of Oxime- and Methyloxime-Containing Flavone, Isoflavone, and Xanthone Derivatives. Chem Biodivers 2005; 2:253-63. [PMID: 17191978 DOI: 10.1002/cbdv.200590008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A series of oxime- and methyloxime-containing flavone, isoflavone, and xanthone derivatives (1-12) were synthesized (Scheme) and evaluated for their cytotoxic (Table 1) and antiplatelet activities (Table 2). The in vitro anticancer assay indicated that the cytotoxicity of structurally related compounds decreases in the order isoflavones (7a-7c) > flavones (8a-8c) > xanthones (9a-9c), electron-releasing substituents (R) on the Ph ring being favorable (mean GI50 values of 2.84, 12.3, and 20.9 microM for 7c, 8c, and 9c, resp.). The inhibition of platelet aggregation induced by arachidonic acid (AA) similarly decreased from the isoflavone 1 (IC50 = 2.97 microM) to the flavone 2 (7.70 microM) to the xanthone 3 (inactive). Thereby, compound 1 seems to be a promising lead, since it was not only the most-potent aggregation inhibitor (IC50 = 2.97 microM), but was also found to be noncytotoxic at a concentration of 100 microM.
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Affiliation(s)
- Tai-Chi Wang
- Department of Pharmacy, Tajen Institute of Technology, Pingtung 907, Taiwan, Republic of China.
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Fonseca D, Ward WE. Daidzein together with high calcium preserve bone mass and biomechanical strength at multiple sites in ovariectomized mice. Bone 2004; 35:489-97. [PMID: 15268901 DOI: 10.1016/j.bone.2004.03.031] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2003] [Revised: 03/28/2004] [Accepted: 03/30/2004] [Indexed: 10/26/2022]
Abstract
As the prevalence of osteoporosis is increasing, and the adverse effects of hormone replacement therapy are evident, women are searching for natural alternatives such as soy isoflavones to help prevent postmenopausal osteoporosis. Daidzein is one of the most abundant isoflavones present in soy and it is unique as it can be further metabolized to equol, a compound with greater estrogenic activity than other isoflavones. The objective of this study was to determine the effects of purified daidzein in combination with high calcium (Ca) on preserving femur and lumbar vertebrae (LV1-LV4) bone mineral density (BMD) and biomechanical bone strength at three different sites (femur midpoint, femur neck and LV3) in ovariectomized mice. Sham (SH) mice (n = 12) received control diet (AIN93G) containing 2 g Ca/kg diet and ovariectomized mice were randomized to 1 of 6 groups (n = 12/group): OVX (2 g Ca/kg diet), HCa (25 g Ca/kg diet), HD (2 g Ca + 200 mg daidzein/kg diet), HDCa (25 g Ca + 200 mg daidzein/kg diet), LD (2 g Ca + 100 mg daidzein/kg diet) or LDCa (25 g Ca + 100 mg daidzein/kg diet) for 12 weeks. HDCa preserved femur and vertebrae BMD and biomechanical bone strength (at all three sites) compared to the OVX group, however, only femur yield load (at midpoint) was preserved to a level that was greater (P < 0.05) than HCa alone. Mice fed HD diet had greater (P < 0.05) femur BMD than OVX group, however, daidzein alone (HD) did not appear to preserve trabecular bone (i.e., vertebrae BMD and vertebra peak load). All mice fed daidzein produced equol and there were no uterotrophic effects of daidzein at either dose. Both daidzein and Ca attenuated the increase in serum IL-1beta observed in the OVX group. The results from this study suggest that the combination of daidzein and high Ca favorably affect cortical and trabecular bone as indicated by femur and lumbar vertebrae BMD and biomechanical strength but much of this effect is mediated by the high Ca diet. Further investigation is required to determine optimal dietary levels of daidzein and Ca with the long-term goal of developing a dietary strategy to prevent postmenopausal osteoporosis and related fragility fractures.
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Affiliation(s)
- Debbie Fonseca
- Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada M5S 3E2
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Senturk N, Keles GC, Kaymaz FF, Yildiz L, Acikgoz G, Turanli AY. The role of ascorbic acid on collagen structure and levels of serum interleukin-6 and tumour necrosis factor-alpha in experimental lathyrism. Clin Exp Dermatol 2004; 29:168-75. [PMID: 14987276 DOI: 10.1111/j.1365-2230.2004.01473.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Lathyrism is characterized by defective collagen synthesis due to inhibition of lysyl oxidase, an enzyme essential for interfibrillar cross-linking. The lathyritic agent beta-aminoproprionitrile (beta-APN) is considered an appropriate agent for studying connective tissue metabolism. We investigated the effects of ascorbic acid on collagen structure and serum cytokine levels in experimentally induced lathyrism. Forty Wistar rats weighing 200-300 g were used in the study: three test groups of 10 rats each (groups 2, 3 and 4) and 10 rats used as a control group (group 1). Experimental lathyrism was induced with daily subcutaneous injections of beta-APN in the test groups for 40 days. On the 40th day, skin biopsies were taken from the control group (group 1) and group 2, to evaluate the effect of beta-APN on dermal collagen. After the 40th day, 10 rats received ascorbic acid 100 mg/kg intraperitoneally daily for 15 days (group 3) and 10 rats (group 4) received no medication and served as a control for group 3. On the 55th day, skin biopsies were taken from groups 3 and 4. Serum concentrations of interleukin-6 and tumour necrosis factor-alpha were assessed in each group by enzyme-linked immunosorbent assay. Ultrastructural examination of the skin biopsies in group 1 revealed normal-appearing epidermal and dermal structures. Group 2 showed disorganization of the epidermis and collagen structure, and vacuolization of the endoplasmic reticulum in fibroblasts. In group 3, ultrastructural examination revealed significant improvement in the structure of dermal collagen after administration of ascorbic acid, whereas the changes in group 4 were unremarkable. Ascorbic acid administration significantly decreased the concentrations of serum cytokines in group 3 compared with group 2 (P < 0.001). Ascorbic acid administration significantly improved dermal collagen structure and serum cytokine levels in experimental lathyrism.
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Affiliation(s)
- N Senturk
- Department of Dermatology, Faculty of Medicine, Hacettepe University, Ankara, Turkey.
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