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Sueajai J, Sutjarit N, Boonmuen N, Auparakkitanon S, Noumjad N, Suksamrarn A, Vinayavekhin N, Piyachaturawat P. Lowering of lysophosphatidylcholines in ovariectomized rats by Curcuma comosa. PLoS One 2022; 17:e0268179. [PMID: 35588422 PMCID: PMC9119514 DOI: 10.1371/journal.pone.0268179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 04/24/2022] [Indexed: 11/19/2022] Open
Abstract
Decline of ovarian function in menopausal women increases metabolic disease risk. Curcuma comosa extract and its major compound, (3R)-1,7-diphenyl-(4E,6E)-4,6-heptadien-3-ol (DPHD), improved estrogen-deficient ovariectomized (OVX) rat metabolic disturbances. However, information on their effects on metabolites is limited. Here, we investigated the impacts of C. comosa ethanol extract and DPHD on 12-week-old OVX rat metabolic disturbances, emphasizing the less hydrophobic metabolites. Metabolomics analysis of OVX rat serum showed a marked increase compared to sham-operated rat (SHAM) in levels of lysophosphatidylcholines (lysoPCs), particularly lysoPC (18:0) and lysoPC (16:0), and of arachidonic acid (AA), metabolites associated with inflammation. OVX rat elevated lysoPCs and AA levels reverted to SHAM levels following treatments with C. comosa ethanol extract and DPHD. Overall, our studies demonstrate the effect of C. comosa extract in ameliorating the metabolic disturbances caused by ovariectomy, and the elevated levels of bioactive lipid metabolites, lysoPCs and AA, may serve as potential biomarkers of menopausal metabolic disturbances.
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Affiliation(s)
- Jetjamnong Sueajai
- Toxicology Graduate Program, Faculty of Science, Mahidol University, Bangkok, Thailand
- Department of Pathology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Nareerat Sutjarit
- Graduate Program in Nutrition, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Nittaya Boonmuen
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Saranya Auparakkitanon
- Department of Pathology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Nantida Noumjad
- Department of Pathology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Apichart Suksamrarn
- Department of Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkok, Thailand
| | - Nawaporn Vinayavekhin
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Center of Excellence in Biocatalyst and Sustainable Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- * E-mail:
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Vafaeipour Z, Razavi BM, Hosseinzadeh H. Effects of turmeric (Curcuma longa) and its constituent (curcumin) on the metabolic syndrome: An updated review. JOURNAL OF INTEGRATIVE MEDICINE 2022; 20:193-203. [PMID: 35292209 DOI: 10.1016/j.joim.2022.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 01/13/2022] [Indexed: 12/16/2022]
Abstract
Metabolic syndrome (MS) involves people with the following risk factors: obesity, hypertension, high glucose level and hyperlipidemia. It can increase the risk of heart disease, stroke and type 2 diabetes mellitus. The prevalence of MS in the world's adult population is about 20%-25%. Today, there is much care to use medicinal plants. Turmeric (Curcuma longa) as well as curcumin which is derived from the rhizome of the plant, has been shown beneficial effects on different components of MS. Thus, the purpose of this manuscript was to introduce different in vitro, in vivo and human studies regarding the effect of turmeric and its constituent on MS. Moreover, different mechanisms of action by which this plant overcomes MS have been introduced. Based on studies, turmeric and its bioactive component, curcumin, due to their anti-inflammatory and antioxidant properties, have antidiabetic effects through increasing insulin release, antihyperlipidemic effects by increasing fatty acid uptake, anti-obesity effects by decreasing lipogenesis, and antihypertensive effects by increasing nitric oxide. According to several in vivo, in vitro and human studies, it can be concluded that turmeric or curcumin has important values as a complementary therapy in MS. However, more clinical trials should be done to confirm these effects.
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Affiliation(s)
- Zeinab Vafaeipour
- Student Research Committee, Mashhad University of Medical Sciences, Mashhad 9177948954, Iran; Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad 9177948954, Iran
| | - Bibi Marjan Razavi
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad 9177948954, Iran; Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad 9177948954, Iran
| | - Hossein Hosseinzadeh
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad 9177948954, Iran; Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad 9177948954, Iran.
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Nurcahyanti ADR, Jap A, Lady J, Prismawan D, Sharopov F, Daoud R, Wink M, Sobeh M. Function of selected natural antidiabetic compounds with potential against cancer via modulation of the PI3K/AKT/mTOR cascade. Biomed Pharmacother 2021; 144:112138. [PMID: 34750026 DOI: 10.1016/j.biopha.2021.112138] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/19/2021] [Accepted: 08/31/2021] [Indexed: 12/12/2022] Open
Abstract
Diabetes mellitus (DM) is a metabolic disorder with growing global incidence, as 387 million people were diagnosed in 2014 with an expected projection of 642 million in 2040. Several complications are associated with DM including heart attack, stroke, kidney failure, blindness, and cancer. The latter is the second leading cause of death worldwide accounting for one in every six deaths, with liver, pancreas, and endometrium cancers are the most abundant among patients with diabetes. Phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt)/mammalian target of rapamycin (mTOR) pathway plays a vital role in developing a wide array of pathological disorders, among them diabetes and cancer. Natural secondary metabolites that counteract the deleterious effects of reactive oxygen species (ROS) and modulate PI3K/Akt/mTOR pathway could be a promising approach in cancer therapy. Here, 717 medicinal plants with antidiabetic activities were highlighted along with 357 bioactive compounds responsible for the antidiabetic activity. Also, 43 individual plant compounds with potential antidiabetic activities against cancer via the modulation of PI3K/Akt/mTOR cascade were identified. Taken together, the available data give an insight of the potential of repurposing medicinal plants and/or the individual secondary metabolites with antidiabetic activities for cancer therapy.
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Affiliation(s)
- Agustina Dwi Retno Nurcahyanti
- Department of Pharmacy, School of Medicine and Health Sciences, Atma Jaya Catholic University of Indonesia, Pluit Raya 2, 14440 Jakarta, Indonesia.
| | - Adeline Jap
- Department of Pharmacy, School of Medicine and Health Sciences, Atma Jaya Catholic University of Indonesia, Pluit Raya 2, 14440 Jakarta, Indonesia
| | - Jullietta Lady
- Department of Pharmacy, School of Medicine and Health Sciences, Atma Jaya Catholic University of Indonesia, Pluit Raya 2, 14440 Jakarta, Indonesia
| | - Deka Prismawan
- Department of Pharmacy, School of Medicine and Health Sciences, Atma Jaya Catholic University of Indonesia, Pluit Raya 2, 14440 Jakarta, Indonesia
| | - Farukh Sharopov
- Chinese-Tajik Innovation Center for Natural Products, National Academy of Sciences of Tajikistan, Ayni str. 299/2, 734063, Dushanbe, Tajikistan
| | - Rachid Daoud
- African Genome Center, Mohammed VI Polytechnic University (UM6P), Lot 660, Hay Moulay Rachid, Ben Guerir 43150, Morocco
| | - Michael Wink
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany
| | - Mansour Sobeh
- AgroBiosciences Research, Mohammed VI Polytechnic University, Lot 660-Hay Moulay Rachid, 43150 Ben-Guerir, Morocco.
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Hayward GC, Baranowski BJ, Marko DM, MacPherson REK. Examining the effects of ovarian hormone loss and diet-induced obesity on Alzheimer's disease markers of amyloid-β production and degradation. J Neurophysiol 2021; 125:1068-1078. [PMID: 33534663 DOI: 10.1152/jn.00489.2020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
After menopause, women experience declines in ovarian sex hormones, an event that has recently been associated with increased amyloid-β peptides, a main feature of Alzheimer's disease. Diet-induced insulin resistance also increases amyloid-β peptides; however, whether this process is exacerbated with ovarian sex hormone loss remains unknown. Female C57BL6/J mice received either bilateral ovariectomy (OVX; n = 20) or remained intact (n = 20) at 24 wk of age and were placed on either a low- or high-fat diet (LFD, n = 10 for OVX and intact; HFD, n = 10 for OVX and intact) for 10 wk. Independently, OVX led to increases in the amyloidogenic marker, soluble amyloid precursor protein β (sAPPβ). The HFD in combination with OVX led to lower insulin degrading enzyme (IDE) protein content and activity in the prefrontal cortex, indicative of decreased amyloid-β degradation; however, no differences in amyloid-β content were observed. Data from this study provide novel evidence of independent effects of peripheral insulin resistance and ovarian sex hormone loss in decreasing brain markers of amyloid-β degradation. Furthermore, findings indicate how the loss of ovarian sex hormones can promote the formation of amyloidogenic APP cleavage products, independent of diet-induced insulin resistance.NEW & NOTEWORTHY This study provides novel insight into the effect of peripheral insulin resistance and ovarian hormone loss in decreasing brain markers of amyloid-β degradation. Results demonstrate that ovarian hormone loss through ovariectomy increased the amyloidogenic marker, sAPPβ, while the high-fat diet in combination with ovariectomy led to lower IDE protein content and activity in the prefrontal cortex, indicative of decreased amyloid-β degradation. These original results provide important information for future targets in early AD pathogenesis.
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Affiliation(s)
- Grant C Hayward
- Department of Health Sciences, Brock University, St Catharines, Ontario, Canada.,Centre for Neuroscience, Brock University, St. Catharines, Ontario, Canada.,Faculty of Medicine, Ottawa University, Ottawa, Ontario, Canada
| | - Bradley J Baranowski
- Department of Health Sciences, Brock University, St Catharines, Ontario, Canada.,Centre for Neuroscience, Brock University, St. Catharines, Ontario, Canada
| | - Daniel M Marko
- Department of Health Sciences, Brock University, St Catharines, Ontario, Canada.,Centre for Neuroscience, Brock University, St. Catharines, Ontario, Canada
| | - Rebecca E K MacPherson
- Department of Health Sciences, Brock University, St Catharines, Ontario, Canada.,Centre for Neuroscience, Brock University, St. Catharines, Ontario, Canada
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Buniam J, Chukijrungroat N, Rattanavichit Y, Surapongchai J, Weerachayaphorn J, Bupha-Intr T, Saengsirisuwan V. 20-Hydroxyecdysone ameliorates metabolic and cardiovascular dysfunction in high-fat-high-fructose-fed ovariectomized rats. BMC Complement Med Ther 2020; 20:140. [PMID: 32375750 PMCID: PMC7203795 DOI: 10.1186/s12906-020-02936-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 04/27/2020] [Indexed: 12/21/2022] Open
Abstract
Background Ecdysteroids are polyhydroxylated steroids present in invertebrates and plants. 20-Hydroxyecdysone (20E) is the most common and the main biologically active compound of ecdysteroids. Previous studies have demonstrated anabolic and metabolic effects of 20E in mammals. However, it is unknown whether 20E has a positive effect on all aspects of cardiometabolic syndrome. The aims of this study were to investigate the favorable effect and possible underlying mechanisms of 20E in a rat model of cardiometabolic syndrome (CMS) induced by a high-calorie diet combined with female sex hormone deprivation. Methods 20E (5 mg/kg, 10 mg/kg, or 20 mg/kg) or pioglitazone (PIO) (10 mg/kg) was intragastrically administered to sham-operated Sprague-Dawley female rats and ovariectomized rats fed a high-fat-high-fructose diet (OHFFD) for 8 weeks. The phenotypic characteristics of CMS, including central adiposity, blood pressure, serum lipid profile, glucose tolerance, insulin action on skeletal muscle glucose transport activity and hepatic protein expression, were determined. Results Some CMS characteristics were improved by 20E treatment. Rats treated with 20E had lower body weight, abdominal fat accumulation than rats treated with vehicle control without changes in total caloric intake and fat-free mass. OHFFD rats exhibited high blood pressure, but 20E-treated rats maintained normal blood pressure with a lower level of low-density lipoprotein (LDL)-cholesterol. Although 20E showed no positive effect on inducing insulin-mediated glucose transport in the skeletal muscle of OHFFD rats, 20E improved whole body glucose homeostasis. Analysis of protein expression in livers from 20E-treated rats revealed significantly increased expression of pAkt Ser473, pFOXO1 Ser256, pAMPKα Thr172, and FGF21. Conclusion 20E treatment can alleviate cardiometabolic disorder caused by a high-fat-high-fructose diet and female sex hormone deprivation. In particular, 20E helps improve whole body insulin sensitivity in OHFFD rats, and the mechanisms that underlie this favorable effect are potentially mediated by the activation of AMPK and FGF21. The present study indicates that 20E could be an alternative therapeutic option for the prevention and alleviation of cardiometabolic syndrome.
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Affiliation(s)
- Jariya Buniam
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Natsasi Chukijrungroat
- Faculty of Physical Therapy, Huachiew Chalermprakiet University, Samut Prakan, 10540, Thailand
| | - Yupaporn Rattanavichit
- Division of Physical Therapy, Faculty of Physical Therapy, Srinakharinwirot University, Nakhon Nayok, 26120, Thailand
| | | | | | - Tepmanas Bupha-Intr
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Vitoon Saengsirisuwan
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand.
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Prasannarong M, Saengsirisuwan V, Surapongchai J, Buniam J, Chukijrungroat N, Rattanavichit Y. Rosmarinic acid improves hypertension and skeletal muscle glucose transport in angiotensin II-treated rats. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 19:165. [PMID: 31286941 PMCID: PMC6615279 DOI: 10.1186/s12906-019-2579-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 06/26/2019] [Indexed: 12/16/2022]
Abstract
BACKGROUND Rosmarinic acid (RA) is a natural pure compound from herbs belonging to the Lamiaceae family, such as rosemary, sage, basil, and mint. The antioxidant, angiotensin-converting enzyme inhibitory, and vasodilatory effects of RA have been revealed. Angiotensin II (ANG II) is a potent agent that generates hypertension and oxidative stress. Hypertension and skeletal muscle insulin resistance are strongly related. The aim of this study was to evaluate the effects of acute and chronic RA treatment on blood pressure and skeletal muscle glucose transport in ANG II-induced hypertensive rats. METHODS Eight-week-old male Sprague Dawley rats were separated into SHAM and ANG II-infused (250 ng/kg/min) groups. ANG II rats were treated with or without acute or chronic RA at 10, 20, or 40 mg/kg. At the end of the experiment, body weight, liver and heart weights, oral glucose tolerance, skeletal muscle glucose transport activity, and signaling proteins were evaluated. RESULTS Both acute and chronic RA treatment decreased systolic, diastolic, and mean arterial blood pressure. Only acute RA at 40 mg/kg resulted in a reduction of fasting plasma glucose levels and an induction of skeletal muscle glucose transport activity. These effects might involve increased ERK activity in skeletal muscle. Meanwhile, chronic RA treatment with 10, 20, and 40 mg/kg prevented ANG II-induced hyperglycemia. CONCLUSIONS Both acute and chronic RA treatment attenuated ANG II-induced cardiometabolic abnormalities in rats. Therefore, RA would be an alternative strategy for improving skeletal muscle glucose transport and protecting against ANG II-induced hypertension and hyperglycemia.
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Affiliation(s)
- Mujalin Prasannarong
- Department of Physical Therapy, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200 Thailand
| | - Vitoon Saengsirisuwan
- Exercise Physiology Laboratory, Department of Physiology, Faculty of Science, Mahidol University, Bangkok, 10400 Thailand
| | | | - Jariya Buniam
- Exercise Physiology Laboratory, Department of Physiology, Faculty of Science, Mahidol University, Bangkok, 10400 Thailand
| | - Natsasi Chukijrungroat
- Faculty of Physical Therapy, Huachiew Chalermprakiet University, Samut Prakan, 10540 Thailand
| | - Yupaporn Rattanavichit
- Division of Physical Therapy, Faculty of Physical Therapy, Srinakharinwirot University, Nakhon Nayok, 26120 Thailand
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Kouhestani S, Zare S, Babaei P. Flavonoids Fraction of Mespilus Germanica Alleviates Insulin Resistance in Metabolic Syndrome Model of Ovariectomized Rats via Reduction in Tumor Necrosis Factor-α. J Menopausal Med 2018; 24:169-175. [PMID: 30671409 PMCID: PMC6336565 DOI: 10.6118/jmm.2018.24.3.169] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 08/21/2018] [Accepted: 08/29/2018] [Indexed: 12/01/2022] Open
Abstract
Objectives The rate of metabolic syndrome (MetS) in women diagnosed as they age is one of the main concerns of health cares. Recently new strategies used to prevent progressions of MetS toward the diagnosis of diabetes have focused on plant flavonoids. This study was aimed to investigate the beneficial effects of flavonoids fraction of Mespilus germanica leaves (MGL) on MetS in ovariectomized (OVX) rats. Methods Twenty-four adult female Wistar rats, weighing 200 to 250 g, were divided into 3 groups: Sham surgery, OVX + Salin, or OVX + Flavonoid. Three weeks after ovariectomy, animals displayed MetS criteria received flavonoid injection (10 mg/kg, intraperitoneally) for 21 days. Then the body weight, body mass index, waist circumference, visceral fat, fasting blood glucose, serum insulin, lipid profiles and tumor necrosis factor-α (TNF-α) were measured. Results Treatment with flavonoids fraction of MGL significantly decreased serum level of insulin (P = 0.011), glucose (P = 0.024), TNF-α (P = 0.010), also MetS Z score (P = 0.020) and homeostasis model assessment of insulin resistance (P = 0.007). Lipid profiles and visceral fat showed insignificant reduction. Conclusions Flavonoids of MGL attenuates some of the MetS components possibly via reduction in TNF-α inflammatory cytokine.
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Affiliation(s)
- Somayeh Kouhestani
- Cellular and Molecular Research Center, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran.,Department of Physiology, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran.,Department of Biology, Faculty of Basic Sciences, Urmia University, Urmia, Iran
| | - Samad Zare
- Department of Biology, Faculty of Basic Sciences, Urmia University, Urmia, Iran
| | - Parvin Babaei
- Cellular and Molecular Research Center, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran.,Department of Physiology, Faculty of Medicine, Guilan University of Medical Sciences, Rasht, Iran
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Preventative effects of resveratrol and estradiol on streptozotocin-induced diabetes in ovariectomized mice and the related mechanisms. PLoS One 2018; 13:e0204499. [PMID: 30273360 PMCID: PMC6166971 DOI: 10.1371/journal.pone.0204499] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 09/10/2018] [Indexed: 12/20/2022] Open
Abstract
Resveratrol, a non-flavonoid polyphenolic compound, is structurally and functionally similar to estrogen and has drawn great attention for its potentially beneficial effects on diabetes. However, it is not known whether it shares the same protective effect against diabetes as estrogen and the underlying mechanisms. The aim of the present study was to investigate the protective effects of phytoestrogen resveratrol and exogenous 17β-estradiol against streptozotocin (STZ)-induced type 1 diabetes. Female mice were ovariectomized (OVX) and chronically injected with different concentrations of resveratrol (0.1, 1 or 10 mg/kg) and 17β-estradiol (0.01, 0.1 or 1 mg/kg) subcutaneously for 4 weeks, and the levels of blood glucose, plasma insulin, plasma antioxidant capacity, the changes of pancreatic islet cells and the expressions of glucose transporter 4 (GLUT4), insulin receptor substrate 1 (IRS-1) and phosphorylation of extracellular signal-regulated kinase (p-ERK) were detected. Resveratrol and 17β-estradiol significantly inhibited the increase of the blood glucose level and the rise of plasma malondialdehyde in STZ-induced diabetic mice, improved the levels of plasma antioxidant capacity and plasma insulin, protected the pancreatic islet cells, and increased the expressions of GLUT4 and IRS-1, but decreased p-ERK expression in skeletal muscle and myocardial tissue. The results suggest that resveratrol or 17β-estradiol shows obvious protection against STZ-induced diabetes in OVX mice, the mechanisms probably involve their ameliorating antioxidant activities and islet function, promoting muscle glucose uptake and inhibiting the expression of p-ERK.
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Sutjarit N, Sueajai J, Boonmuen N, Sornkaew N, Suksamrarn A, Tuchinda P, Zhu W, Weerachayaphorn J, Piyachaturawat P. Curcuma comosa reduces visceral adipose tissue and improves dyslipidemia in ovariectomized rats. JOURNAL OF ETHNOPHARMACOLOGY 2018; 215:167-175. [PMID: 29273438 DOI: 10.1016/j.jep.2017.12.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 12/14/2017] [Accepted: 12/18/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Curcuma comosa Roxb. (C. comosa) or Wan chak motluk Zingiberaceae family, is widely used in Thai traditional medicine for treatment of gynecological problems as well as relief of postmenopausal symptoms. Since C. comosa contains phytoestrogen and causes lipid lowering effect by an unknown mechanism, we investigated its effect on adiposity and lipid metabolism in estrogen-deprived rats. MATERIALS AND METHODS Adult female rats were ovariectomized (OVX) and received daily doses of either a phytoestrogen from C. comosa [(3R)-1,7-diphenyl-(4E,6E)-4,6-heptadien-3-ol; DPHD], C. comosa extract, or estrogen (17β-estradiol; E2) for 12 weeks. Adipose tissue mass, serum levels of lipids and adipokines were determined. In addition, genes and proteins involved in lipid synthesis and fatty acid oxidation in visceral adipose tissue were analyzed. RESULTS Ovariectomy for 12 weeks elevated level of serum lipids and increased visceral fat mass and adipocyte size. These alterations were accompanied with the up-regulation of lipogenic mRNA and protein expressions including LXR-α, SREBP1c and their downstream targets. OVX rats showed decrease in proteins involved in fatty acid oxidation including AMPK-α and PPAR-α in adipose tissue, as well as alteration of adipokines; leptin and adiponectin. Treatments with E2, DPHD or C. comosa extract in OVX rats prevented an increase in adiposity, down-regulated lipogenic genes and proteins with marked increases in the protein levels of AMPK-α and PPAR-α. These findings indicated that their lipid lowering effects were mediated via the suppression of lipid synthesis in concert with an increase in fatty acid oxidation. CONCLUSIONS C. comosa exerts a lipid lowering effect in the estrogen deficient rats through the modulations of lipid synthesis and AMPK-α activity in adipose tissues, supporting the use of this plant for health promotion in the post-menopausal women.
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Affiliation(s)
- Nareerat Sutjarit
- Toxicology Graduate Program, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Jetjamnong Sueajai
- Department of Pathology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand
| | - Nittaya Boonmuen
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Nilubon Sornkaew
- Department of Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand
| | - Apichart Suksamrarn
- Department of Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand
| | - Patoomratana Tuchinda
- Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Weiming Zhu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | | | - Pawinee Piyachaturawat
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
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Busayapongchai P, Siri S. Simple assay for screening phytoestrogenic compounds using the oestrogen receptor immobilised magnetite nanoparticles. IET Nanobiotechnol 2017; 11:395-402. [PMID: 28530188 DOI: 10.1049/iet-nbt.2016.0139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
With increasing interests of phytoestrogens for their potential applications, a rapid and simple tool for screening these phytochemicals is still required. In this study, a simple assay to detect phytoestrogens was developed based on the competition binding between the tested samples and the fluorescently labelled oestrogen (E2) to the human ligand binding domain of oestrogen receptor (LBD-ER) that was immobilised on the magnetite nanoparticles (MNPs). The 40-kDa LBD-ER peptide was produced in an Escherichia coli system. The synthesised 68.7-nm MNPs were silanised and subsequently covalently linked to the C-terminus of LBD-ER peptide. The LBD-ER immobilised MNPs demonstrated the specific binding for the standard E2 with the equilibrium dissociation constant of 9.56 nM and the binding capacity of 0.08 pmol/1 mg of the MNPs. The LBD-ER immobilised MNPs could evaluate oestrogenic activity of the extracts of Asparagus racemosus and Curcuma comosa, the reported phytoestrogenic plants, but not progesterone (P4) and Raphanus sativus extract, the negative controls. The results of this work clearly demonstrated a potential assay for detecting phytoestrogens of crude plant extracts, which is simple and easily adapted to a high throughput format.
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Affiliation(s)
| | - Sineenat Siri
- School of Biology, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima, Thailand.
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Sun W, Wang S, Zhao W, Wu C, Guo S, Gao H, Tao H, Lu J, Wang Y, Chen X. Chemical constituents and biological research on plants in the genus Curcuma. Crit Rev Food Sci Nutr 2017; 57:1451-1523. [PMID: 27229295 DOI: 10.1080/10408398.2016.1176554] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Curcuma, a valuable genus in the family Zingiberaceae, includes approximately 110 species. These plants are native to Southeast Asia and are extensively cultivated in India, China, Sri Lanka, Indonesia, Peru, Australia, and the West Indies. The plants have long been used in folk medicine to treat stomach ailments, stimulate digestion, and protect the digestive organs, including the intestines, stomach, and liver. In recent years, substantial progress has been achieved in investigations regarding the chemical and pharmacological properties, as well as in clinical trials of certain Curcuma species. This review comprehensively summarizes the current knowledge on the chemistry and briefly discusses the biological activities of Curcuma species. A total of 720 compounds, including 102 diphenylalkanoids, 19 phenylpropene derivatives, 529 terpenoids, 15 flavonoids, 7 steroids, 3 alkaloids, and 44 compounds of other types isolated or identified from 32 species, have been phytochemically investigated. The biological activities of plant extracts and pure compounds are classified into 15 groups in detail, with emphasis on anti-inflammatory and antitumor activities.
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Affiliation(s)
- Wen Sun
- a State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao , China
| | - Sheng Wang
- b State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Materia Medica, China Academy of Chinese Medical Sciences , Beijing , China
| | - Wenwen Zhao
- a State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao , China
| | - Chuanhong Wu
- a State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao , China
| | - Shuhui Guo
- a State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao , China
| | - Hongwei Gao
- a State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao , China
| | - Hongxun Tao
- a State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao , China
| | - Jinjian Lu
- a State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao , China
| | - Yitao Wang
- a State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao , China
| | - Xiuping Chen
- a State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau , Macao , China
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Vinayavekhin N, Sueajai J, Chaihad N, Panrak R, Chokchaisiri R, Sangvanich P, Suksamrarn A, Piyachaturawat P. Serum lipidomics analysis of ovariectomized rats under Curcuma comosa treatment. JOURNAL OF ETHNOPHARMACOLOGY 2016; 192:273-282. [PMID: 27448454 DOI: 10.1016/j.jep.2016.07.054] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 06/26/2016] [Accepted: 07/19/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Curcuma comosa Roxb. (C. comosa) or Wan Chak Motluk, Zingiberaceae family, has been used in Thai traditional medicine for the treatment of gynecological problems and inflammation. AIM OF THE STUDY This study aimed to investigate the therapeutic potential of C. comosa by determining the changes in the lipid profiles in the ovariectomized rats, as a model of estrogen-deficiency-induced hyperlipidemia, after treatment with different components of C. comosa using an untargeted lipidomics approach. MATERIALS AND METHODS Lipids were extracted from the serum of adult female rats subjected to a sham operation (SHAM; control), ovariectomy (OVX), or OVX with 12-week daily doses of estrogen (17β-estradiol; E2), (3R)-1,7-diphenyl-(4E,6E)-4,6-heptadien-3-ol (DPHD; a phytoestrogen from C. comosa), powdered C. comosa rhizomes or its crude ethanol extract. They were then analyzed by liquid chromatography-mass spectrometry, characterized, and subjected to the orthogonal projections to latent structures discriminant analysis statistical model to identify tentative biomarkers. RESULTS Levels of five classes of lipids (ceramide, ceramide-1-phosphate, sphingomyelin, 1-O-alkenyl-lysophosphatidylethanolamine and lysophosphatidylethanolamine) were elevated in the OVX rats compared to those in the SHAM rats, while the monoacylglycerols and triacylglycerols were decreased. The E2 treatment only reversed the levels of ceramides, whereas treatments with DPHD, C. comosa extract or powder returned the levels of all upregulated lipids back to those in the SHAM control rats. CONCLUSIONS The findings suggest the potential beneficial effects of C. comosa on preventing the increased ceramide levels in OVX rats, a possible cause of metabolic disturbance under estrogen deficiency. Overall, the results demonstrated the power of untargeted lipidomics in discovering disease-relevant biomarkers, as well as evaluating the effectiveness of treatment by C. comosa components (DPHD, extract or powder) as utilized in Thai traditional medicine, and also providing scientific support for its folklore use.
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Affiliation(s)
- Nawaporn Vinayavekhin
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Omics Sciences and Bioinformatics Center, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Jetjamnong Sueajai
- Toxicology Graduate Program, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
| | - Nichaboon Chaihad
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Ratchanee Panrak
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
| | | | - Polkit Sangvanich
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Apichart Suksamrarn
- Department of Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand.
| | - Pawinee Piyachaturawat
- Department of Physiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand; Chakri Naruebodindra Medical Institute, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand.
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Abedinzade M, Nasri S, Jamal Omodi M, Ghasemi E, Ghorbani A. Efficacy of Trigonella foenum-graecum Seed Extract in Reducing Metabolic and Inflammatory Alterations Associated With Menopause. IRANIAN RED CRESCENT MEDICAL JOURNAL 2015; 17:e26685. [PMID: 26732240 PMCID: PMC4698329 DOI: 10.5812/ircmj.26685] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Revised: 04/01/2015] [Accepted: 04/21/2015] [Indexed: 02/03/2023]
Abstract
Background: Several experimental and clinical studies support beneficial effects of Trigonella foenum-graecum (fenugreek) in the management of metabolic diseases and inflammatory disorders. Objectives: The purpose of this study was to examine the effect of T. foenum-graecum seed extract in reducing the metabolic and inflammatory alternations associated with menopause. Materials and Methods: In this experimental study, 49 rats were divided into seven groups: (I) sham-control, (II) ovariectomized-control, (III and IV) ovariectomized treated with 50 and 150 mg/kg of T. foenum-graecum seed ethanolic extract, (V and VI) ovariectomized treated with 50 and 150 mg/kg of T. foenum-graecum hexanic extract, (VII) ovariectomized-positive control treated with 10 µg/kg of estradiol. The extracts were injected intraperitoneally one day after ovariectomy and the treatments were lasted for 42 days. Results: Fasting blood glucose and body weight gain increased significantly in the ovariectomized-control group compared with that in the sham animals (P < 0.05). Administration of estradiol and T. foenum-graecum (50 and 150 mg/dL of hexanic extract and 150 mg/kg of ethanolic extract) significantly diminished the increase in glucose and body weight (P < 0.05). The serum level of interleukin-1 (IL-1), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α) in the ovariectomized control group was significantly higher than those in the sham animals (P < 0.05). Both hexanic and ethanolic extracts as well as estradiol were able to decrease level of these cytokines in the serum of ovariectomized rats (P < 0.05). Conclusions: The results of the present study show that administration of T. foenum-graecum corrects metabolic and inflammatory alterations associated with ovariectomy and has a potential for the management of menopause.
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Affiliation(s)
- Mahmood Abedinzade
- Medical Biotechnology Research Center, Paramedical School, Guilan University of Medical Sciences, Rasht, IR Iran
| | - Sima Nasri
- Department of Biology, Payame Noor University, Tehran, IR Iran
- Corresponding Author: Sima Nasri, Department of Biology, Payame Noor University, Tehran, IR Iran. Tel: +98-9123277539, Fax: +98-2188948995, E-mail:
| | | | - Elham Ghasemi
- Department of Biology, Payame Noor University, Tehran, IR Iran
| | - Ahmad Ghorbani
- Pharmacological Research Center of Medicinal Plants, School of Medicine, Mashhad University of Medical Sciences, Mashhad, IR Iran
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Abnormalities in three-dimensional capillary architecture and imbalance between vascular endothelial growth factor-A and thrombospondin-1 in soleus muscle of ovariectomized rat. Acta Histochem 2015; 117:605-11. [PMID: 26092525 DOI: 10.1016/j.acthis.2015.06.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Revised: 05/29/2015] [Accepted: 06/01/2015] [Indexed: 11/23/2022]
Abstract
Reduced ovarian hormone levels associated with menopause or ovariectomy (OVX) not only result in vascular dysfunction but also lead to structural abnormalities in capillaries. Therefore, the effect of OVX on the three-dimensional (3-D) architecture of capillary networks and the underlying molecular mechanisms were investigated in rat soleus muscle. Seven-week-old female Wistar rats were divided into the OVX and sham-treated (Sham) groups. The OVX group exhibited lower endurance exercise capacity compared to the sham group and resulted in decreased capillary diameter, number of anastomoses and capillary/anastomosis volume in soleus muscle, indicating 3-D structural abnormalities of capillary networks. Furthermore, OVX led to increased concentrations of thrombospondin-1 (TSP-1) protein and a decreased VEGF-A/TSP-1 ratio, an indicator of angio-adaptations, in soleus muscle compared with the Sham group. These results indicate OVX may induce 3-D capillary regression in soleus muscle through an imbalance between VEGF-A and TSP-1 expression, possibly associated with decreased exercise tolerance in ovariectomized rats.
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Efficacy of Trigonella foenum-graecum Seed Extract in Reducing Metabolic and Inflammatory Alterations Associated With Menopause. IRANIAN RED CRESCENT MEDICAL JOURNAL 2015. [DOI: 10.5812/ircmj.17(5)2015.26685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Yoon L, Liu YN, Park H, Kim HS. Olive Leaf Extract Elevates Hepatic PPAR α mRNA Expression and Improves Serum Lipid Profiles in Ovariectomized Rats. J Med Food 2015; 18:738-44. [PMID: 25714618 DOI: 10.1089/jmf.2014.3287] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
We hypothesized that olive leaf extract might alleviate dyslipidemia resulting from estrogen deficiency. Serum lipid profile and mRNA expression of the related genes in the liver and adipose tissue were analyzed after providing olive leaf extract (200 or 400 mg/kg body weight; n=7 for each group) to ovariectomized rats for 10 weeks. After 10 weeks' administration, the rats in the olive leaf extract-administered groups showed significantly lower levels of serum triglyceride and very-low-density lipoprotein (VLDL)-cholesterol compared with the rats in the control group, whereas the administration of olive leaf extract did not significantly change the elevated low-density lipoprotein cholesterol levels. In addition, administration of high dose of olive leaf extract significantly decreased the liver triglyceride and increased serum estradiol levels. mRNA expressions of peroxisome proliferator-activated receptor alpha (PPAR α) and acyl-CoA oxidase (ACO) were not affected by ovariectomy, however, administration of olive leaf extract significantly increased both PPAR α and ACO mRNA expression. Expression of adiponectin mRNA in adipose tissue was significantly decreased in the ovariectomized control group. Rats administered low-dose olive leaf extract showed significantly elevated adiponectin mRNA expression compared with rats in the ovariectomized control group. Even though dose-dependent effects were not observed in most of the measurements, these results suggest that genes involved in lipid metabolism may be regulated by olive leaf extract administration in ovariectomized rats.
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Affiliation(s)
- Leena Yoon
- 1 Division of Life Systems, College of Science, Sookmyung Women's University , Seoul, Korea
| | - Ya-Nan Liu
- 2 Major in Food and Nutrition, College of Human Ecology, Sookmyung Women's University , Seoul, Korea
| | - Hyunjin Park
- 2 Major in Food and Nutrition, College of Human Ecology, Sookmyung Women's University , Seoul, Korea.,3 ICAN Nutrition Education and Research , Seoul, Korea
| | - Hyun-Sook Kim
- 1 Division of Life Systems, College of Science, Sookmyung Women's University , Seoul, Korea.,2 Major in Food and Nutrition, College of Human Ecology, Sookmyung Women's University , Seoul, Korea
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Eddouks M, Bidi A, El Bouhali B, Hajji L, Zeggwagh NA. Antidiabetic plants improving insulin sensitivity. ACTA ACUST UNITED AC 2014; 66:1197-214. [PMID: 24730446 DOI: 10.1111/jphp.12243] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Accepted: 02/23/2014] [Indexed: 12/19/2022]
Abstract
BACKGROUND Globally, the prevalence of diabetes mellitus is increasing at an alarming rate. This chronic pathology gravely troubled the human health and quality of life. Both insulin deficiency and insulin resistance are involved in the pathophysiology of diabetes mellitus. Moreover, insulin resistance is being diagnosed nowadays in a growing population of diabetic and obese patients, especially in industrialized societies. There are lots of conventional agents available to control and to treat diabetes, but total recovery from this disorder has not been reported up to this date. Plants provided a potential source of hypoglycemic drugs and are widely used in several traditional systems of medicine to prevent diabetes. A few reviews with less attention paid to mechanisms of action have been published on antidiabetic plants. OBJECTIVES The present review focuses on the various plants that have been reported to be effective in improving insulin sensitivity associated with diabetes. KEY FINDINGS In this work, an updated systematic review of the published literature has been conducted to review the antidiabetic plants improving insulin sensitivity and 111 medicinal plants have been reported to have a beneficial effect on insulin sensitivity using several in-vitro and in-vivo animal models of diabetes. CONCLUSION The different metabolic and cellular effects of the antidiabetic plants improving insulin sensitivity are reported indicating the important role of medicinal plants as potential alternative or complementary use in controlling insulin resistance associated with diabetes mellitus.
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Affiliation(s)
- Mohamed Eddouks
- Faculty of Sciences and Techniques Errachidia, Moulay Ismail University, Errachidia, Morocco
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Root-Bernstein R, Podufaly A, Dillon PF. Estradiol Binds to Insulin and Insulin Receptor Decreasing Insulin Binding in vitro. Front Endocrinol (Lausanne) 2014; 5:118. [PMID: 25101056 PMCID: PMC4104309 DOI: 10.3389/fendo.2014.00118] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 07/04/2014] [Indexed: 11/13/2022] Open
Abstract
RATIONALE Insulin (INS) resistance associated with hyperestrogenemias occurs in gestational diabetes mellitus, polycystic ovary syndrome, ovarian hyperstimulation syndrome, estrogen therapies, metabolic syndrome, and obesity. The mechanism by which INS and estrogen interact is unknown. We hypothesize that estrogen binds directly to INS and the insulin receptor (IR) producing INS resistance. OBJECTIVES To determine the binding constants of steroid hormones to INS, the IR, and INS-like peptides derived from the IR; and to investigate the effect of estrogens on the binding of INS to its receptor. METHODS Ultraviolet spectroscopy, capillary electrophoresis, and NMR demonstrated estrogen binding to INS and its receptor. Horse-radish peroxidase-linked INS was used in an ELISA-like procedure to measure the effect of estradiol on binding of INS to its receptor. MEASUREMENTS Binding constants for estrogens to INS and the IR were determined by concentration-dependent spectral shifts. The effect of estradiol on INS binding to its receptor was determined by shifts in the INS binding curve. MAIN RESULTS Estradiol bound to INS with a K d of 12 × 10(-9) M and to the IR with a K d of 24 × 10(-9) M, while other hormones had significantly less affinity. Twenty-two nanomolars of estradiol shifted the binding curve of INS to its receptor 0.8 log units to the right. CONCLUSION Estradiol concentrations in hyperestrogenemic syndromes may interfere with INS binding to its receptor producing significant INS resistance.
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Affiliation(s)
- Robert Root-Bernstein
- Department of Physiology, Michigan State University, East Lansing, MI, USA
- *Correspondence: Robert Root-Bernstein, Department of Physiology, Michigan State University, 2174 Biomedical and Physical Science Building, East Lansing, MI 48824, USA e-mail:
| | - Abigail Podufaly
- College of Osteopathic Medicine, Michigan State University, East Lansing, MI, USA
| | - Patrick F. Dillon
- Department of Physiology, Michigan State University, East Lansing, MI, USA
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Wang Y, Li B, Zhang W, Liu Y, Xue P, Ma J, Li Y. Impaired PI3 K Akt expression in liver and skeletal muscle of ovariectomized rats. Endocrine 2013; 44:659-65. [PMID: 23377702 DOI: 10.1007/s12020-013-9894-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Accepted: 01/22/2013] [Indexed: 01/08/2023]
Abstract
It is well established that estrogen deficiency is strongly linked to the development of insulin resistance (IR), but the mechanism is still unclear. Since IR is characterized by a marked reduction in insulin-stimulated PI3 K-mediated activation of Akt in liver and skeletal muscle, we hypothesized that ovariectomized rats (OVX) would exhibit reductions in the expression of proteins in PI3 K signaling pathway, including PI3 K and Akt. As hypothesized, after observing for 12 weeks, compared with the SHAM rats, ovariectomy led to decreased plasma estrogen level and increased HOMA-IR index; in addition, ovariectomy also caused decreased PI3 K and Akt expression levels in the liver and skeletal muscle. Interestingly, the expression patterns differed in tissue-dependent fashion: Akt1 was only found reduction in liver, whereas Akt2 decreased in muscle; these changes can be reversed by estrogen supplement (OVXE). In conclusion, data demonstrate that estrogen withdrawals may cause IR at least in part by impaired PI3 K/Akt signaling proteins in liver and skeletal muscle, and Akt1 and Akt2 might be tissue-specific expressions.
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Affiliation(s)
- Yan Wang
- Department of Endocrinology, The Third Hospital of Hebei Medical University, Shijiazhuang, 050051, China,
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