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Chike-Ekwughe A, John-Africa LB, Adebayo AH, Ogunlana OO. Antioxidative and anti-diabetic effects of Tapinanthus cordifolius leaf extract on high-fat diet and streptozotocin-induced type 2 diabetic rats. Biomed Pharmacother 2024; 176:116774. [PMID: 38820976 DOI: 10.1016/j.biopha.2024.116774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 05/09/2024] [Accepted: 05/17/2024] [Indexed: 06/02/2024] Open
Abstract
Type 2 diabetes mellitus (T2DM) remains a global health concern despite current treatment options. This study investigated the potential of Tapinanthus cordifolius (TC) leaf extract as a therapeutic agent for T2DM. T2DM was induced in rats using a high-fat diet and streptozotocin. Diabetic rats received daily oral administration of TC extract (200, 400, or 800 mg/kg) and metformin (400 mg/kg) or remained untreated for 21 days. Blood glucose levels, body weight, diabetic symptoms, oxidative stress markers, and gene expression of metabolic regulators were assessed. TC treatment significantly reduced blood glucose levels and restored body weight in diabetic rats, comparable to the effects of metformin. TC also increased antioxidant enzyme activities (SOD, GST, and CAT) and decreased lipid peroxidation in various tissues. Furthermore, TC upregulated gene expression of glucose transporter type 4 (GLUT-4) and adiponectin receptor 2 (ADIPOR-2) while downregulating pro-inflammatory cytokines TNF-α and IL-6. This study provides the first in vivo evidence supporting TC leaf extract's anti-diabetic and antioxidant efficacy. The findings suggest that TC holds promise as a natural therapeutic agent for managing T2DM through multiple mechanisms, including improved glycemic control, enhanced insulin sensitivity, and protection against oxidative stress and tissue damage. In conclusion, this study validates the ethnobotanical use of TC as an anti-diabetic agent. Further research is warranted to isolate the bioactive compounds responsible for these effects.
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Affiliation(s)
- Amarachi Chike-Ekwughe
- Department of Biochemistry, College of Science and Technology, Covenant University, Ota, Ogun State, Nigeria; Department of Life Sciences, Faculty of Computing and Applied Sciences, Baze University, Abuja, Nigeria.
| | - Lucy Binda John-Africa
- Department of Pharmacology and Toxicology, National Institute for Pharmaceutical and Research Development, Idu Industrial Area, Abuja, Nigeria
| | - Abiodun Humphrey Adebayo
- Department of Biochemistry, College of Science and Technology, Covenant University, Ota, Ogun State, Nigeria
| | - Olubanke Olujoke Ogunlana
- Department of Biochemistry, College of Science and Technology, Covenant University, Ota, Ogun State, Nigeria.
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Saleh NKM, Mohamed AEHA, Moussa MH, Assal Y, Lasheen NN. Garlic oil improves small intestinal motility in experimentally induced type II diabetes mellitus in female Wistar rats. PLoS One 2024; 19:e0301621. [PMID: 38630691 PMCID: PMC11023395 DOI: 10.1371/journal.pone.0301621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Accepted: 03/19/2024] [Indexed: 04/19/2024] Open
Abstract
Diabetes mellitus adversely affects the contractile ability of the small intestine. However, there is a paucity of studies investigating the impact of garlic oil on small intestinal motility. This study aimed to evaluate the potential beneficial effects of garlic oil on type 2 diabetes mellitus in rats. Thirty-six adult female Wistar rats (n = 36) were divided into four groups: control, non-diabetic rats supplemented with garlic oil, diabetic rats, and diabetic rats treated with garlic oil. The rats were anesthetized using pentobarbitone (40 mg/kg BW); various motility parameters and oxidative markers were determined in small intestinal segments. Measurements were taken for naso-anal length, waist circumference, fasting blood glucose level (FBG), and plasma insulin level. Compared to the control group, the diabetic rats exhibited a reduction in the average force of contraction and motility index in all small intestinal segments. Furthermore, the rats exhibited a reduction in the average duration of muscle contraction only in the jejunum. The rats also exhibited hyperglycemia, insulin resistance, significant oxidative stress, and obesity. This was proven by changes in motility parameters, fasting blood glucose levels, HOMA-IR values, intestinal MDA levels, and waist circumference. The non-diabetic rats supplemented with garlic oil also exhibited a decrease in the average force of contraction and motility index in all small intestinal segments, despite having consistently higher Lee index and waist circumference values. However, the diabetic rats treated with garlic oil demonstrated improved small intestinal motility in nearly all small intestinal segments and a reduction in oxidative stress. In conclusion, rats with diabetes mellitus experienced a decrease in small intestinal motility, which is primarily driven by oxidative stress. Normal rats administered with garlic oil supplements exhibited similar effects. In contrast, garlic oil treatment in diabetic rats led to enhanced small intestinal motility and a notable anti-hyperglycemic effect, which can be attributed to the potent antioxidant properties of garlic oil.
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Affiliation(s)
| | | | | | - Yasmin Assal
- Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Noha N. Lasheen
- Faculty of Medicine, Ain Shams University, Cairo, Egypt
- Faculty of Medicine, Galala University, Suez, Egypt
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Hasan Chowdhury MA, Al Araby SQ, Alelwani W, Kattan SW, Mansouri OA, Uddin Rahat MR, Khan M, Tangpong J, Rahman MA. Green-synthesized nanoparticles of the polyherbal extract attenuate the necrosis of pancreatic β-cell in a streptozotocin-induced diabetic model. Heliyon 2023; 9:e16137. [PMID: 37251822 PMCID: PMC10208926 DOI: 10.1016/j.heliyon.2023.e16137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 04/21/2023] [Accepted: 05/06/2023] [Indexed: 05/31/2023] Open
Abstract
Plant-based nanoformulation is one of the novel approaches for therapeutic benefits. This research synthesized a silver nanoparticle from the polyherbal combination of four plants/seeds (Momordica charantia, Trigonella foenum-graecum, Nigella sativa, and Ocimum sanctum) and investigated its antidiabetic effects in streptozotocin-induced Wistar albino rat model. The polyherbal extract (PH) was extracted by the Soxhlet-solvent extraction method and the resulting crude extract was undergone for silver nanoparticle synthesis. The PH extract was subjected to a four-week intervention in fructose-fed streptozotocin-induced Wistar Albino rats' models and in vitro antioxidative tests. Experimental animals (age: 6-7 weeks, male, body weight: 200-220 g), were divided into five groups including normal control (NC), reference control (RC), diabetic control (DC), and treatment groups PH200, PH100, and PHAgNP20. After three weeks of intervention, body weight, weekly blood glucose level, oral glucose tolerance test, AST, ALT, alkaline phosphatase, total cholesterol, triglycerides, uric acid, urea, and creatinine level of PH200 were found to be significantly (P < 0.05) improved compared to the diabetic control. The same dose demonstrated better regeneration of damaged pancreatic and kidney tissues. In vitro antioxidant assay manifested promising IC50 values of 86.17 μg/mL for DPPH, 711.04 μg/mL for superoxide free radical, and 0.48 mg/mL for Iron chelating activity of the polyherbal extract. GC-MS analysis impacted the major volatile compounds of the PH. The data demonstrate that the PH and its nanoparticles could be a novel source of antidiabetic therapeutics through an advanced dose-response study in the type 2 diabetic model.
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Affiliation(s)
| | | | - Walla Alelwani
- Department of Biochemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Shahad W. Kattan
- Medical Laboratory Department, College of Applied Medical Sciences, Taibah University, Yanbu, Saudi Arabia
| | - Omniah A. Mansouri
- Department of Biology, Collage of Science, University of Jeddah, Saudi Arabia
| | - Mohammad Rasib Uddin Rahat
- Department of Pharmacy, International Islamic University Chittagong, Kumira, Sitakunda, Chittagong-4318, Bangladesh
| | - Mala Khan
- Bangladesh Reference Institute for Chemical Measurements (BRiCM), Dr. Qudrat-i-Khuda Road, Dhanmondi, Dhaka-1205, Bangladesh
| | - Jitbanjong Tangpong
- School of Allied Health Sciences, Walailak University, Nakkhon-Shi Thammarat, Nakhon Si Thammarat, 80160, Thailand
| | - Md. Atiar Rahman
- Department of Biochemistry & Molecular Biology, University of Chittagong, Chittagong-4331, Bangladesh
- School of Allied Health Sciences, Walailak University, Nakkhon-Shi Thammarat, Nakhon Si Thammarat, 80160, Thailand
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Desoye G, Herrera E. Adipose tissue development and lipid metabolism in the human fetus: The 2020 perspective focusing on maternal diabetes and obesity. Prog Lipid Res 2020; 81:101082. [PMID: 33383022 DOI: 10.1016/j.plipres.2020.101082] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 12/21/2020] [Accepted: 12/22/2020] [Indexed: 12/12/2022]
Abstract
During development, the human fetus accrues the highest proportion of fat of all mammals. Precursors of fat lobules can be found at week 14 of pregnancy. Thereafter, they expand, filling with triacylglycerols during pregnancy. The resultant mature lipid-filled adipocytes emerge from a developmental programme of embryonic stem cells, which is regulated differently than adult adipogenesis. Fetal triacylglycerol synthesis uses glycerol and fatty acids derived predominantly from glycolysis and lipogenesis in liver and adipocytes. The fatty acid composition of fetal adipose tissue at the end of pregnancy shows a preponderance of palmitic acid, and differs from the mother. Maternal diabetes mellitus does not influence this fatty acid profile. Glucose oxidation is the main source of energy for the fetus, but mitochondrial fatty acid oxidation also contributes. Indirect evidence suggests the presence of lipoprotein lipase in fetal adipose tissue. Its activity may be increased under hyperinsulinemic conditions as in maternal diabetes mellitus and obesity, thereby contributing to increased triacylglycerol deposition found in the newborns of such pregnancies. Fetal lipolysis is low. Changes in the expression of genes controlling metabolism in fetal adipose tissue appear to contribute actively to the increased neonatal fat mass found in diabetes and obesity. Many of these processes are under endocrine regulation, principally by insulin, and show sex-differences. Novel fatty acid derived signals such as oxylipins are present in cord blood with as yet undiscovered function. Despite many decades of research on fetal lipid deposition and metabolism, many key questions await answers.
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Affiliation(s)
- G Desoye
- Department of Obstetrics and Gynaecology, Medical University of Graz, Graz, Austria.
| | - E Herrera
- Faculties of Pharmacy and Medicine, University CEU San Pablo, Madrid, Spain.
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Kilari BP, Mudgil P, Azimullah S, Bansal N, Ojha S, Maqsood S. Effect of camel milk protein hydrolysates against hyperglycemia, hyperlipidemia, and associated oxidative stress in streptozotocin (STZ)-induced diabetic rats. J Dairy Sci 2020; 104:1304-1317. [PMID: 33272578 DOI: 10.3168/jds.2020-19412] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 09/08/2020] [Indexed: 12/12/2022]
Abstract
This study investigated the effect of camel milk protein hydrolysates (CMPH) at 100, 500 and 1,000 mg/kg of body weight (BW) for 8 wk on hyperglycemia, hyperlipidemia, and associated oxidative stress in streptozotocin-induced diabetic rats. Body weights and fasting blood glucose levels were observed after every week until 8 wk, and oral glucose tolerance test (OGTT) levels and biochemical parameters were evaluated after 8 wk in blood and serum samples. Antioxidant enzyme activity and lipid peroxidation in the liver were estimated, and histological examination of the liver and pancreatic tissues was also conducted. Results showed that CMPH at 500 mg/kg of BW [camel milk protein hydrolysate, mid-level dosage (CMPH-M)] exhibited potent hypoglycemic activity, as shown in the reduction in fasting blood glucose and OGTT levels. The hypolipidemic effect of CMPH was indicated by normalization of serum lipid levels. Significant improvement in activity of superoxide dismutase and catalase, and reduced glutathione levels were observed, along with the attenuation of malondialdehyde content in groups fed CMPH, especially CMPH-M, was observed. Decreased levels of liver function enzymes (aspartate aminotransferase and alanine aminotransferase) in the CMPH-M group was also noted. Histology of liver and pancreatic tissue displayed absence of lipid accumulation in hepatocytes and preservation of β-cells in the CMPH-M group compared with the diabetic control group. This is the first study to report anti-hyperglycemic and anti-hyperlipidemic effect of CMPH in an animal model system. This study indicates that CMPH can be suggested for its therapeutic benefits for hyperglycemia and hyperlipidemia, thus validating its use for better management of diabetes and associated comorbidities.
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Affiliation(s)
- Bhanu Priya Kilari
- Department of Food Science, College of Food and Agriculture, United Arab Emirates University, Al-Ain, 15551, United Arab Emirates
| | - Priti Mudgil
- Department of Food Science, College of Food and Agriculture, United Arab Emirates University, Al-Ain, 15551, United Arab Emirates
| | - Sheikh Azimullah
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, 17666, United Arab Emirates
| | - Nidhi Bansal
- ARC Dairy Innovation Hub, School of Agriculture and Food Sciences, The University of Queensland, QLD 4072, Australia
| | - Shreesh Ojha
- Department of Pharmacology and Therapeutics, College of Medicine and Health Sciences, United Arab Emirates University, Al-Ain, 17666, United Arab Emirates.
| | - Sajid Maqsood
- Department of Food Science, College of Food and Agriculture, United Arab Emirates University, Al-Ain, 15551, United Arab Emirates.
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Hebi M, Eddouks M. Leaf Aqueous Extract of Argania spiniosa Exhibits Antihyperglycemic Effect in Diabetic Rats. Cardiovasc Hematol Agents Med Chem 2019; 17:64-71. [PMID: 31187714 PMCID: PMC6864554 DOI: 10.2174/1871525717666190611143514] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/30/2019] [Accepted: 05/16/2019] [Indexed: 11/22/2022]
Abstract
Introduction: Argania Spinosa L. (Sapotaceae) is an endemic species from south-western Morocco. This plant has many traditional uses including its use in the treatment of diabetes. Objective: The objective of the study was to evaluate the antidiabetic activity of Argania Spinosa Leaf Aqueous Extract (A.S.L.A.E). Methods: The antidiabetic effect of A.S.L.A.E was evaluated in both normal and streptozotocin (STZ)-induced diabetic rats treated at a dose of 20 mg/kg body weight for 15 days. The histopathological changes in the liver were evaluated. In addition, the antioxidant activity of this extract was also studied. Results: Single oral administration of A.S.L.A.E (20 mg/kg) showed no significant change in blood glucose levels in both normal and STZ induced diabetic rats after 6 hours of administration. Furthermore, in normal rats, repeated oral administration of A.S.L.A.E reduced blood glucose levels. Moreover, blood glucose levels decreased in STZ diabetic rats after fifteen days of treatment. According to the oral glucose tolerance test, the A.S.L.A.E (20 mg/kg) was shown to prevent significantly the increase in blood glucose levels in normal treated rats. Moreover, A.S.L.A.E showed antioxidant activity. Conclusion: The results show that Argania spinosa leaf aqueous extract possesses significant antihyperglycemic activity.
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Affiliation(s)
- Morad Hebi
- Faculty of Sciences and Techniques Errachidia, Moulay Ismail University, BP 509, Boutalamine, 52000, Errachidia, Morocco
| | - Mohamed Eddouks
- Faculty of Sciences and Techniques Errachidia, Moulay Ismail University, BP 509, Boutalamine, 52000, Errachidia, Morocco
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Gallego FQ, Miranda CA, Sinzato YK, Iessi IL, Dallaqua B, Pando RH, Rocha NS, Volpato GT, Damasceno DC. Temporal analysis of distribution pattern of islet cells and antioxidant enzymes for diabetes onset in postnatal critical development window in rats. Life Sci 2019; 226:57-67. [PMID: 30930115 DOI: 10.1016/j.lfs.2019.03.061] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 03/12/2019] [Accepted: 03/25/2019] [Indexed: 12/22/2022]
Abstract
AIM At performing a temporal analysis of the distribution pattern of islet endocrine cells and antioxidant enzymes in diabetic rats during the post-natal critical development window. MAIN METHODS The newborns received streptozotocin (STZ) at birth for diabetes induction, and control females received the vehicle. The animals were euthanized at different lifetimes: D5, D10, D15, and D30. Morphological analysis of pancreas and biochemical assays was performed. KEY FINDINGS The STZ-induced rats presented irregular shape of islet on D5 and there was an attempt to restore of this shape in other life moment studied. There was an increase progressive in islet area, however they maintained smaller than those of control rats, with lower labeling intensity for insulin, higher for glucagon and somatostatin, lower for SOD-1 was lower in the islets of the STZ-induced animals at all times studied and for GSH-Px in D10 and D30. SIGNIFICANCE Although STZ-induced diabetic rats presented compensatory mechanisms to restore the mass of endocrine cells, this was not sufficient since these rats developed the diabetic state. This was confirmed by the oral glucose tolerance test from D30. In addition, the delta (δ)-cells presented ectopic location in islets, indicating a possible relationship for beta (β)-cell mass restoration. There was a response of the pancreas to reduce the hyperglycemia in the first month of life. Furthermore, the cells from the endocrine pancreas of diabetic animals show a decline of antioxidant enzymatic, contributing to the increased susceptibility of cells to hyperglycemia-induced ROS in this postnatal critical development window.
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Affiliation(s)
- Franciane Quintanilha Gallego
- Laboratory of Experimental Research of Gynecology and Obstetrics, Postgraduate Course of Gynecology, Obstetrics and Mastology, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Carolina Abreu Miranda
- Laboratory of Experimental Research of Gynecology and Obstetrics, Postgraduate Course of Gynecology, Obstetrics and Mastology, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Yuri Karen Sinzato
- Laboratory of Experimental Research of Gynecology and Obstetrics, Postgraduate Course of Gynecology, Obstetrics and Mastology, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Isabela Lovizutto Iessi
- Laboratory of Experimental Research of Gynecology and Obstetrics, Postgraduate Course of Gynecology, Obstetrics and Mastology, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Bruna Dallaqua
- DeVry Ruy Barbosa School (DeVry Brazil Group), Salvador, Bahia State, Brazil
| | - Rogelio Hernandez Pando
- Department of Pathology, National Institute of Medical Sciences and Nutrition "Salvador Zubirán", Mexico City, Mexico
| | - Noeme Sousa Rocha
- Department of Pathology, School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Gustavo Tadeu Volpato
- Laboratory of System Physiology and Reproductive Toxicology, Institute of Biological and Health Sciences, Federal University of Mato Grosso (UFMT), Barra do Garças, Mato Grosso State, Brazil
| | - Débora Cristina Damasceno
- Laboratory of Experimental Research of Gynecology and Obstetrics, Postgraduate Course of Gynecology, Obstetrics and Mastology, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil.
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Jalili-Nik M, Soukhtanloo M, Javanshir S, Jahani Yazdi A, Esmaeilizadeh M, Jafarian AH, Ghorbani A. Effects of ethanolic extract of Ferula gummosa oleo-resin in a rat model of streptozotocin-induced diabetes. Res Pharm Sci 2019; 14:138-145. [PMID: 31620190 PMCID: PMC6791176 DOI: 10.4103/1735-5362.253361] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Previous studies have shown that some plants in the genus of Ferula (Apiaceae) have antidiabetic effects. The present work was aimed to evaluate effects of Ferula gummosa oleo-resin in a rat model of streptozotocin-induced diabetes. Male Wistar rats were randomized into five groups (n = 6): normal control, diabetic control, diabetic rats treated with insulin (3 IU/day), and diabetic rats treated with 100 or 400 mg/kg/day of an ethanolic extract of the oleo-resin. After 4 weeks, blood samples were collected for measuring fasting blood glucose (FBG), lipid profile, aspartate aminotransferase, alanine aminotransferase (ALT), alkaline phosphatase, blood urea nitrogen, and creatinine. In addition, levels of lipid peroxidation, thiol groups, and superoxide dismutase (SOD) activity were evaluated in the liver and kidney. At the end of the fourth week, the level of FBG in rats treated with 100 mg/kg of the extract was lower than that in diabetic control rats (273 ± 39 mg/dL vs 471 ± 32 mg/dL). Administration of insulin and the extract had no significant effects on the serum lipids. Insulin and both doses of the extract significantly reduced the activity of ALT. In addition, the extract inhibited lipid peroxidation in the kidney and restored the elevated level of SOD in the liver and kidneys. Ferula gummosa oleo-resin has the potential to prevent or delay the complications of diabetes by inhibiting the progression of hyperglycemia and attenuating oxidative stress-induced damage in the liver and kidneys.
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Affiliation(s)
- Mohammad Jalili-Nik
- Department of Clinical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - Mohammad Soukhtanloo
- Department of Clinical Biochemistry, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - Sajad Javanshir
- Student Research Committee, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - Amirali Jahani Yazdi
- Department of Laboratory Sciences, School of Paramedical Sciences, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - Mahdi Esmaeilizadeh
- Department of Basic Sciences, Esfarayen Faculty of Medical Sciences, Esfarayen, I.R. Iran.,Student Research Committee, Esfarayen Faculty of Medical Sciences, Esfarayen, I.R. Iran
| | - Amir Hossein Jafarian
- Cancer Molecular Pathology Research Center, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - Ahmad Ghorbani
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
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Lee S, Kwak JH, Kim SH, Yun J, Cho JY, Kim K, Hwang D, Jung YS. A comparison of metabolomic changes in type-1 diabetic C57BL/6N mice originating from different sources. Lab Anim Res 2018; 34:232-238. [PMID: 30671110 PMCID: PMC6333615 DOI: 10.5625/lar.2018.34.4.232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 12/04/2018] [Accepted: 12/04/2018] [Indexed: 11/21/2022] Open
Abstract
Animal models have been used to elucidate the pathophysiology of varying diseases and to provide insight into potential targets for therapeutic intervention. Although alternatives to animal testing have been proposed to help overcome potential drawbacks related to animal experiments and avoid ethical issues, their use remains vital for the testing of new drug candidates and to identify the most effective strategies for therapeutic intervention. Particularly, the study of metabolic diseases requires the use of animal models to monitor whole-body physiology. In line with this, the National Institute of Food and Drug Safety Evaluation (NIFDS) in Korea has established their own animal strains to help evaluate both efficacy and safety during new drug development. The objective of this study was to characterize the response of C57BL/6NKorl mice from the NIFDS compared with that of other mice originating from the USA and Japan in a chemical-induced diabetic condition. Multiple low-dose treatments with streptozotocin were used to generate a type-1 diabetic animal model which is closely linked to the known clinical pathology of this disease. There were no significantly different responses observed between the varying streptozotocin-induced type-1 diabetic models tested in this study. When comparing control and diabetic mice, increases in liver weight and disturbances in serum amino acids levels of diabetic mice were most remarkable. Although the relationship between type-1 diabetes and BCAA has not been elucidated in this study, the results, which reveal a characteristic increase in diabetic mice of all origins are considered worthy of further study.
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Affiliation(s)
- Seunghyun Lee
- College of Pharmacy, Pusan National University, Busan, Korea
| | - Jae-Hwan Kwak
- College of Pharmacy, Brain Busan 21 Plus Program, Kyungsung University, Busan, Korea
| | - Sou Hyun Kim
- College of Pharmacy, Pusan National University, Busan, Korea
| | - Jieun Yun
- Department of Pharmaceutical Engineering, Cheongju University, Cheongju, Korea
| | - Joon-Yong Cho
- Department of Health and Exercise Science, Korea National Sport University, Seoul, Korea
| | - Kilsoo Kim
- College of Veterinary Medicine, Kyungpook National University, Daegu, Korea
| | - Daeyeon Hwang
- College of Natural Resources & Life Science/Life and Industry Convergence Research Institute, Pusan National University, Miryang, Korea
| | - Young-Suk Jung
- College of Pharmacy, Pusan National University, Busan, Korea
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10
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Silveira AS, Aydos RD, Ramalho RT, Silva IS, Caldas RDA, Santos Neto ATD, Rodrigues CT. Oxidative stress effects in the uterus, placenta and fetus of pregnant rats submitted to acute and chronic stress. Acta Cir Bras 2018; 33:806-815. [PMID: 30328913 DOI: 10.1590/s0102-865020180090000009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 08/04/2018] [Indexed: 12/24/2022] Open
Abstract
PURPOSE To evaluate the effects of oxidative stress in pregnant rats submitted to acute and chronic stress, relating to alterations in the uterus, placenta and fetus. METHODS Twenty-four female Wistar albino (Rattus norvegicus), were divided into four groups, for induction of oxidative stress the animals were submitted to cold and physical immobilization. Plasma fasting glucose and MDA were determined in all groups and the fetuses and placentas were measured. RESULTS There were no statistical differences in the levels of malonic dialdehyde (MDA), however the averages of chronic stress group were higher compared to control groups, which could explain the observed adverse effects; there was no correlation between puppies' size, the weight of the placenta and MDA values. CONCLUSIONS Chronic stress causes adverse effects, when compared to control groups; chronic stress group had fetuses, placentas and number of puppies, significantly lower compared to other groups. The rats exposed to chronic stress, also presented a higher frequency of fetal resorption.
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Affiliation(s)
- Adriano Silva Silveira
- Fellow Master degree, Postgraduate Program in Health and Development in the Midwest Region, Universidade Federal do Mato Grosso do Sul (UFMS), Campo Grande-MS, Brazil. Conception and design of the study; technical procedures; acquisition, interpretation and analysis of data; manuscript writing
| | - Ricardo Dutra Aydos
- PhD, Associate Professor of Surgery, Postgraduate Program in Health and Development in the Midwest Region, UFMS, Campo Grande-MS, Brazil. Conception and design of the study, interpretation of data, manuscript writing, critical revision, final approval
| | - Rondon Tosta Ramalho
- Full Professor, Laboratory of Experimental Carcinogenicity, UFMS, Campo Grande-MS, Brazil. Macroscopic and histopathologic analysis
| | - Iandara Schettert Silva
- Full Professor, Postgraduate Program in Health and Development in the Midwest Region, UFMS, Campo Grande-MS, Brazil. Intellectual and scientific content of the study
| | - Ruy de Araujo Caldas
- Senior Visiting Professor, UFMS, Campo Grande-MS, Brazil. English language, manuscript writing
| | - Abílio Torres Dos Santos Neto
- Fellow Master degree, Postgraduate Program in Health and Development in the Midwest Region, UFMS, Campo Grande-MS, Brazil. Technical procedures
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Parmar KM, Shende PR, Katare N, Dhobi M, Prasad SK. Wound healing potential of Solanum xanthocarpum in streptozotocin-induced diabetic rats. ACTA ACUST UNITED AC 2018; 70:1389-1400. [PMID: 29984407 DOI: 10.1111/jphp.12975] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 06/15/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The objective of the present study was to evaluate wound healing potential of Solanum xanthocarpum extract in streptozotocin-induced diabetic rats. METHODS Alcoholic extract of the aerial parts (ESX) was subjected to phytochemical estimations and its standardization with chlorogenic acid using HPLC. ESX was then evaluated for wound healing potential in, streptozotocin-induced diabetic rats using excision and incision wound models on topical and oral treatment Various biochemical evaluations, such as collagen, hexosamine, hyaluronic acid, protein, DNA along with antioxidant parameters, proinflammatory cytokines, VEGF and histopathological examination were also evaluated. KEY FINDINGS Extract of S. xanthocarpum depicted the presence of mainly alkaloids, polyphenols, steroids, while content of chlorogenic acid was found to be 8.44% w/w. The maximum effective nature of ESX in healing was observed at 10% gel (topical) and 200 mg/kg (orally) in diabetic rats, where highest healing power was observed when treated both orally and topically. Biochemical evaluations showed significant increase in the levels of collagen, hexosamine, hyaluronic acid, protein, DNA followed by significant decline in the levels of blood glucose, lipid peroxidation, nitric oxide and expression of proinflammatory cytokines, supported by histopathology. CONCLUSIONS The potential healing effect in diabetic rats may be attributed to the presence of chlorogenic acid in combination with other phytoconstituents.
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Affiliation(s)
- Komal M Parmar
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, Maharashtra, India
| | - Priyanka R Shende
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, Maharashtra, India
| | - Nitin Katare
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, Maharashtra, India
| | - Mahaveer Dhobi
- Department of Pharmacognosy and Phytochemistry, Delhi Pharmaceutical Sciences and Research University, New Delhi, India
| | - Satyendra K Prasad
- Department of Pharmaceutical Sciences, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur, Maharashtra, India
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12
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Seck A, Hichami A, Doucouré S, Diallo Agne F, Bassène H, Ba A, Sokhna C, Khan NA, Samb A. Th1/Th2 Dichotomy in Obese Women with Gestational Diabetes and Their Macrosomic Babies. J Diabetes Res 2018; 2018:8474617. [PMID: 30539027 PMCID: PMC6261071 DOI: 10.1155/2018/8474617] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 09/25/2018] [Indexed: 12/17/2022] Open
Abstract
The aim of the study was to assess T cell differentiation and the modulation of inflammatory cytokines in obese and gestational diabetes mellitus (GDM) women and their macrosomic newborns. Hence, immediately after delivery, blood samples were collected through the mother's arm vein and the umbilical cordon vein. Biochemical parameters measured were HbA1C, glucose, insulin, triglyceride (TG), total cholesterol (Tchol), HDL cholesterol (HDLchol), and LDL cholesterol (LDLchol). T lymphocytes were purified from the total blood with Ficoll-Paque. The mRNA expression of inflammatory markers in T cells was determined by RT-qPCR. We observed that diabetic mothers exhibited higher HbA1C, glycemia, insulinemia, TG, Tchol, HDLchol, and LDLchol levels than control mothers. Glycemia was not significantly different between macrosomic and control newborns. However, insulinemia was high in macrosomic babies. TG, Tchol, HDLchol, and LDLchol were not significantly different between macrosomic and control babies. In diabetic mothers, mRNA expression of the Th1 cell subtype was significantly increased. Th1 markers were upregulated in babies born to diabetic women than in control newborns. However, expression of two Th2 markers (GATA3 and IL-4) was not significantly different between control and GDM women and between their respective newborns. Interestingly, IL-10 mRNA expression was decreased in diabetic mothers and their offsprings. The Th1/Th2 cytokine ratio was increased in GDM obese mothers and their macrosomic newborns, suggesting a proinflammatory status in these subjects.
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Affiliation(s)
- A. Seck
- Laboratory of Physiology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, 5005 Dakar-Fann, Senegal
| | - A. Hichami
- U1231 INSERM/Université de Bourgogne-Franche Comté (UBFC)/Agro-Sup, Physiologie de la Nutrition & Toxicologie, Dijon 21000, France
| | - S. Doucouré
- Institute of Research for Development, VITROME Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, IHU-Mediterranean Infection, CP18524 Dakar, Senegal
| | - F. Diallo Agne
- Laboratory of Biochemistry and Molecular Biology, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, 5005 Dakar-Fann, Senegal
| | - H. Bassène
- Institute of Research for Development, VITROME Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, IHU-Mediterranean Infection, CP18524 Dakar, Senegal
| | - A. Ba
- Laboratory of Physiology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, 5005 Dakar-Fann, Senegal
- UMI 3189, “Environnement, Santé, Sociétés”, CNRS, CNRST, Université Bamako-UCAD, Dakar, Senegal
| | - C. Sokhna
- Institute of Research for Development, VITROME Aix Marseille Univ, IRD, AP-HM, SSA, VITROME, IHU-Mediterranean Infection, CP18524 Dakar, Senegal
| | - N. A. Khan
- U1231 INSERM/Université de Bourgogne-Franche Comté (UBFC)/Agro-Sup, Physiologie de la Nutrition & Toxicologie, Dijon 21000, France
| | - A. Samb
- Laboratory of Physiology and Functional Explorations, Faculty of Medicine, Pharmacy and Odontology, Cheikh Anta Diop University, 5005 Dakar-Fann, Senegal
- UMI 3189, “Environnement, Santé, Sociétés”, CNRS, CNRST, Université Bamako-UCAD, Dakar, Senegal
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Ravi S, Shanmugam B, Subbaiah GV, Prasad SH, Reddy KS. Identification of food preservative, stress relief compounds by GC-MS and HR-LC/Q-TOF/MS; evaluation of antioxidant activity of Acalypha indica leaves methanolic extract (in vitro) and polyphenolic fraction (in vivo). JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2017; 54:1585-1596. [PMID: 28559618 PMCID: PMC5430191 DOI: 10.1007/s13197-017-2590-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 03/05/2017] [Accepted: 03/15/2017] [Indexed: 01/24/2023]
Abstract
The present paper has been designed to evaluate phytochemical profile, in vitro free radical scavenging activity, cytotoxicity of methanolic extract and in vivo antioxidant activity of polyphenolic fraction of Acalypha indica leaves. Methanolic extract of A. indica leaves (MEAIL) contained rich amount of phenols, flavonoids and saponins. The GC-MS analysis of extract revealed 13 compounds, whereas HR-LC/Q-TOF/MS showed 87, and all were coincided with functional groups identified by FTIR. The extract showed good scavenging activity on DPPH, H2O2, hydroxyl radicals and metal ions. The Polyphenolic fraction induced the antioxidant enzymes in Diabetic rats. The extract also potentially showed cytotoxic (LC50: 140.02 µg/mL) activity against brine shrimp. Based on these analytical results, in vitro and in vivo experiments, it was concluded that the MEAIL has encompassed rich amount of polyphenols (antioxidants) and cytotoxic compounds for their respective activities. Polyphenolic fraction has the induction capacity to elevate cellular antioxidant enzymes in diabetic animals.
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Affiliation(s)
- Sahukari Ravi
- Division of Molecular Biology and Ethnopharmacology, Department of Zoology, Sri Venkateswara University, Tirupati, 517 502 India
| | - Bhasha Shanmugam
- Division of Molecular Biology and Ethnopharmacology, Department of Zoology, Sri Venkateswara University, Tirupati, 517 502 India
| | - Ganjikunta Venkata Subbaiah
- Division of Molecular Biology and Ethnopharmacology, Department of Zoology, Sri Venkateswara University, Tirupati, 517 502 India
| | - Singamala Hari Prasad
- Division of Molecular Biology and Ethnopharmacology, Department of Zoology, Sri Venkateswara University, Tirupati, 517 502 India
| | - Kesireddy Sathyavelu Reddy
- Division of Molecular Biology and Ethnopharmacology, Department of Zoology, Sri Venkateswara University, Tirupati, 517 502 India
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Hosseini A, Mollazadeh H, Amiri MS, Sadeghnia HR, Ghorbani A. Effects of a standardized extract of Rheum turkestanicum Janischew root on diabetic changes in the kidney, liver and heart of streptozotocin-induced diabetic rats. Biomed Pharmacother 2016; 86:605-611. [PMID: 28027536 DOI: 10.1016/j.biopha.2016.12.059] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 12/12/2016] [Accepted: 12/15/2016] [Indexed: 10/20/2022] Open
Abstract
Numerus studies highlighted benefits of natural flavonoids in the management of diabetes. The present study was aimed to investigate the effects of a high flavonoids containing extract of Rheum turkestanicum on diabetic changes in different tissues. Male Wistar rats were divided into normal and streptozotocin-induced diabetic groups received saline or hydroalcoholic extract of R. turkestanicum root (100, 200 and 300mg/kg) through orogastric gavage for 4 weeks. Serum glucose, HbA1c, lipids, creatinine, uric acid, liver enzymes (alkaline phosphatase, aspartate aminotransferase and alanine aminotransferase), and cardiac enzymes (lactate dehydrogenase and creatine phosphokinase) in diabetic control group were significantly higher compared to normal control group (p<0.001). The extract significantly reduced these factors, increased body weight, and improved both glucosurea and proteinuria. Lipid peroxidation was high in the liver of diabetic rats compared to normal rats (p<0.001) and reverted toward control values by R. turkestanicum. Also, the extract significantly protected the liver, kidney, and heart of diabetic rats against histopathological changes. In conclusion, R. turkestanicum inhibited the development of nephropathy, liver injury, and myocardial damage in diabetes by lowering the serum levels of glucose and lipids, and by inhibiting oxidative stress mediated lipid peroxidation.
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Affiliation(s)
- Azar Hosseini
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamid Mollazadeh
- Department of Physiology and Pharmacology, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | | | - Hamid Reza Sadeghnia
- Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ahmad Ghorbani
- Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran.
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Caluwaerts S, Holemans K, van Bree R, Verhaeghe J, Van Assche FA. Is Low-Dose streptozotocin in Rats an Adequate Model for Gestational Diabetes Mellitus? ACTA ACUST UNITED AC 2016. [DOI: 10.1016/s1071-55760300044-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Silvia Caluwaerts
- Department of Obstetrics and Gynecology, U.Z. Gasthuisberg, Herestraat 49, 3000 Leuven, Belgium
| | | | | | | | - F. André Van Assche
- Department of Obstetrics and Gynecology, Katholieke Universiteit Leuven, Leuven, Belgium
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Hichami A, Grissa O, Mrizak I, Benammar C, Khan NA. Role of T-Cell Polarization and Inflammation and Their Modulation by n-3 Fatty Acids in Gestational Diabetes and Macrosomia. J Nutr Metab 2016; 2016:3124960. [PMID: 27313878 PMCID: PMC4897714 DOI: 10.1155/2016/3124960] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 04/10/2016] [Accepted: 05/05/2016] [Indexed: 01/04/2023] Open
Abstract
Th (T helper) cells are differentiated into either Th1 or Th2 phenotype. It is generally considered that Th1 phenotype is proinflammatory, whereas Th2 phenotype exerts anti-inflammatory or protective effects. Gestational diabetes mellitus (GDM) has been associated with a decreased Th1 phenotype, whereas macrosomia is marked with high expression of Th1 cytokines. Besides, these two pathological situations are marked with high concentrations of inflammatory mediators like tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6), known to play a pivotal role in insulin resistance. Dietary n-3 polyunsaturated fatty acids (n-3 PUFAs) may exert a beneficial effect by shifting Th1/Th2 balance to a Th2 phenotype and increasing insulin sensitivity. In this paper, we shed light on the role of T-cell malfunction that leads to an inflammatory and pathophysiological state, related to insulin resistance in GDM and macrosomia. We will also discuss the nutritional management of these pathologies by dietary n-3 polyunsaturated fatty acids (PUFAs).
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Affiliation(s)
- A. Hichami
- INSERM U866, Université de Bourgogne, 21000 Dijon, France
| | - O. Grissa
- INSERM U866, Université de Bourgogne, 21000 Dijon, France
- Service de Physiologie et Explorations Fonctionnelles, Faculté de Médecine de Sousse, 4000 Sousse, Tunisia
| | - I. Mrizak
- INSERM U866, Université de Bourgogne, 21000 Dijon, France
- Service de Physiologie et Explorations Fonctionnelles, Faculté de Médecine de Sousse, 4000 Sousse, Tunisia
| | - C. Benammar
- INSERM U866, Université de Bourgogne, 21000 Dijon, France
- Laboratoire des Produits Naturels (LAPRONA), Département de Biologie Moléculaire et Cellulaire, Faculté des Sciences, Université Abou Bekr Belkaid, 25000 Tlemcen, Algeria
| | - N. A. Khan
- INSERM U866, Université de Bourgogne, 21000 Dijon, France
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Eleazu CO, Eleazu KC, Iroaganachi MA. Effect of cocoyam (Colocasia esculenta), unripe plantain (Musa paradisiaca) or their combination on glycated hemoglobin, lipogenic enzymes, and lipid metabolism of streptozotocin-induced diabetic rats. PHARMACEUTICAL BIOLOGY 2016; 54:91-7. [PMID: 25880140 DOI: 10.3109/13880209.2015.1016181] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
CONTEXT The possibility of combining unripe plantain [Musa paradisiacae Linn (Plantaginaceae)] and cocoyam [Colocassia esculenta Linn (Araceae)] in the management of diabetes has not been investigated. OBJECTIVE The objective of this study is to evaluate the antihyperglycemic and antihyperlipidemic actions of unripe plantain and cocoyam. MATERIALS AND METHODS Diabetes was induced in rats by intraperitoneal injection of streptozotocin (STZ) (65 mg/kg body weight). Twelve days after STZ induction, respective groups of diabetic rats were fed cocoyam (810 g/kg), unripe plantain (810 g/kg), and unripe plantain + cocoyam (405:405 g/kg) for 28 d. Body weights, feed intake, biochemical parameters, namely serum glucose, total cholesterol, high-density lipoprotein (HDL), low-density lipoprotein (LDL), very low-density lipoprotein (VLDL), atherogenic index, coronary risk index, triacylglycerol, glycated hemoglobin (HbA1C), hepatic isocitrate dehydrogenase, malic enzyme, and glucose-6-phosphate dehydrogenase of the rats and phytochemical composition of the test and standard rat feeds were measured. RESULTS AND DISCUSSION Cocoyam or unripe plantain alone significantly (p < 0.05) ameliorated the body weights (18.89 and 19.95% decreases, respectively) and biochemical parameters as compared with those of STZ controls (31.21% decrease). While combination of cocoyam and unripe plantain significantly (p < 0.05) ameliorated the biochemical parameters of the rats (except HbA1C), it did not ameliorate their body weights (28.53% decrease). The feed intake of the experimental rats did not differ from each other (p > 0.05) at the end of experimentation and the feed samples contained considerable amounts of saponins, alkaloids, flavonoids, and tannins. CONCLUSION Cocoyam or unripe plantain alone showed better antihyperglycemic and anihyperlipidemic action than their combination.
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Abstract
The present study investigated the hepatoprotective role of selenium during alloxan-induced diabetes in rats. Male Wistar rats were divided into four groups, namely, normal control, selenium treated, diabetic, and selenium-treated diabetic. Diabetes was induced in the animals by injecting alloxan intraperitoneally at a dose rate of 150 mg/kg body weight. Selenium in the form of sodium selenite was supplemented to rats at a dose level of 1 ppm in drinking water, ad libitum for two time durations of 2 and 4 weeks. The effects of different treatments were studied on various parameters in rat liver, which included serum glucose levels, serum insulin levels, alkaline phosphatase (ALP), aspartate aminotransferase (AST), alanine aminotransferase (ALT), lipid peroxidation (LPO), glutathione reduced (GSH), oxidized glutathione (GSSG), total glutathione (TG), superoxide dismutase (SOD), catalase (CAT), glutathione reductase, glutathione peroxidase, metallothionein (MT), and histoarchitecture. A significant increase in the serum glucose levels, LPO levels, and in enzyme activities of ALP, ALT, and AST was observed in diabetic rats which, however, got decreased significantly upon supplementation with selenium. On the contrary, decreased enzyme activities of GSSG, SOD, and CAT and depressed levels of GSH as well as serum insulin levels were observed in diabetic rats which got improved following selenium supplementation. Interestingly, MT levels were increased both in diabetic and selenium-treated diabetic rats. Further, marked alterations in histoarchitecture were seen in diabetic rats with the prominent features being congestion in sinusoids, lipid accumulation, and centrilobular hepatocyte degeneration. However, selenium treatment to diabetic rats showed overall improvement in the hepatic histoarchitecture.
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Affiliation(s)
- C Zou
- Department of Endocrinology, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical College, Southeast University, Jiangsu, China Xuzhou Institute of Medical Sciences, Xuzhou Institute of Diabetes, Xuzhou, Jiangsu, China
| | - Q Qiu
- Xuzhou Medical College, Xuzhou, Jiangsu, China
| | - H Chen
- Department of Endocrinology, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical College, Southeast University, Jiangsu, China Xuzhou Institute of Medical Sciences, Xuzhou Institute of Diabetes, Xuzhou, Jiangsu, China
| | - L Dou
- Department of Endocrinology, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical College, Southeast University, Jiangsu, China Xuzhou Institute of Medical Sciences, Xuzhou Institute of Diabetes, Xuzhou, Jiangsu, China
| | - J Liang
- Department of Endocrinology, Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical College, Southeast University, Jiangsu, China Xuzhou Institute of Medical Sciences, Xuzhou Institute of Diabetes, Xuzhou, Jiangsu, China Xuzhou Medical College, Xuzhou, Jiangsu, China
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Hashemnia M, Nikousefat Z, Yazdani-Rostam M. Antidiabetic effect of Pistacia atlantica and Amygdalus scoparia in streptozotocin-induced diabetic mice. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/s00580-015-2068-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Eleazu CO, Eleazu KC, Ironkwe A, Iroaganachi MA. Effect of Livingstone Potato (Plectranthus esculenthus N.E.Br) on Diabetes and Its Complications in Streptozotocin Induced Diabetes in Rats. Diabetes Metab J 2014; 38:366-74. [PMID: 25349824 PMCID: PMC4209351 DOI: 10.4093/dmj.2014.38.5.366] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Accepted: 02/19/2014] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The effect of livingstone potato (Plectranthus esculenthus N.E.Br) on diabetes and its complications in Streptozotocin induced diabetic rats was investigated. The duration of the experiment was 4 weeks. METHODS The blood glucose level of the rats was measured with a glucometer, the protein and glucose and specific gravity in the urine samples of the rats were measured using urine assay strips and urinometer respectively. The liver and kidney function parameters in the serum of the rats were determined using Biosystem Kits. RESULTS The diabetic rats given livingstonepotato incorporated feeds, had 129.7% decrease in their hyperglycemia with corresponding amelioration of their elevated urinary protein, sugars, specific gravity, renal growth, liver growth as well as 15.64% decrease in body weights compared with the nondiabetic rats that had 5.54% decrease in blood glucose and 20.39% increase in body weight unlike the diabetic control rats that had 18.34% decrease in blood glucose and 52.68% decrease in body weight. There were significant differences (P<0.05) in the relative liver, pancreas, and kidney weights of the diabetic rats given livingstone potato feeds compared with the diabetic control while there were no significant differences (P>0.05) in the relative heart weights of all the rats in the three different groups. In terms of liver and kidney function parameters, values obtained for the diabetic rats given livingstone potato incorporated feeds were not significantly different from that of the nondiabetic rats except for total bilurubin, aspartate transaminase, and creatinine (P>0.05) while they were significantly different from the values obtained for the diabetic control rats (P<0.05). In addition, the serum amylase of the diabetic control rats were significantly higher (P<0.05) than that of the nondiabetic and diabetic rats treated with livingstone potato incorporated feeds. CONCLUSION Results show the antidiabetic actions of livingstone potato and its ability to ameliorate glomerular complication and liver hypertrophy in diabetics.
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Affiliation(s)
| | | | - Adanma Ironkwe
- National Root Crops Research Institute, Umudike, Nigeria
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Streptozotocin-induced diabetes models: pathophysiological mechanisms and fetal outcomes. BIOMED RESEARCH INTERNATIONAL 2014; 2014:819065. [PMID: 24977161 PMCID: PMC4058231 DOI: 10.1155/2014/819065] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 04/30/2014] [Accepted: 05/14/2014] [Indexed: 12/26/2022]
Abstract
Glucose homeostasis is controlled by endocrine pancreatic cells, and any pancreatic disturbance can result in diabetes. Because 8% to 12% of diabetic pregnant women present with malformed fetuses, there is great interest in understanding the etiology, pathophysiological mechanisms, and treatment of gestational diabetes. Hyperglycemia enhances the production of reactive oxygen species, leading to oxidative stress, which is involved in diabetic teratogenesis. It has also been suggested that maternal diabetes alters embryonic gene expression, which might cause malformations. Due to ethical issues involving human studies that sometimes have invasive aspects and the multiplicity of uncontrolled variables that can alter the uterine environment during clinical studies, it is necessary to use animal models to better understand diabetic pathophysiology. This review aimed to gather information about pathophysiological mechanisms and fetal outcomes in streptozotocin-induced diabetic rats. To understand the pathophysiological mechanisms and factors involved in diabetes, the use of pancreatic regeneration studies is increasing in an attempt to understand the behavior of pancreatic beta cells. In addition, these studies suggest a new preventive concept as a treatment basis for diabetes, introducing therapeutic efforts to minimize or prevent diabetes-induced oxidative stress, DNA damage, and teratogenesis.
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Damasceno DC, Sinzato YK, Bueno A, Netto AO, Dallaqua B, Gallego FQ, Iessi IL, Corvino SB, Serrano RG, Marini G, Piculo F, Calderon IMP, Rudge MVC. Mild diabetes models and their maternal-fetal repercussions. J Diabetes Res 2013; 2013:473575. [PMID: 23878822 PMCID: PMC3710615 DOI: 10.1155/2013/473575] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 06/10/2013] [Accepted: 06/11/2013] [Indexed: 12/16/2022] Open
Abstract
The presence of diabetes in pregnancy leads to hormonal and metabolic changes making inappropriate intrauterine environment, favoring the onset of maternal and fetal complications. Human studies that explore mechanisms responsible for changes caused by diabetes are limited not only for ethical reasons but also by the many uncontrollable variables. Thus, there is a need to develop appropriate experimental models. The diabetes induced in laboratory animals can be performed by different methods depending on dose, route of administration, and the strain and age of animal used. Many of these studies are carried out in neonatal period or during pregnancy, but the results presented are controversial. So this paper, addresses the review about the different models of mild diabetes induction using streptozotocin in pregnant rats and their repercussions on the maternal and fetal organisms to propose an adequate model for each approached issue.
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Affiliation(s)
- D. C. Damasceno
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - Y. K. Sinzato
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - A. Bueno
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - A. O. Netto
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - B. Dallaqua
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - F. Q. Gallego
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - I. L. Iessi
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - S. B. Corvino
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - R. G. Serrano
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - G. Marini
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - F. Piculo
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - I. M. P. Calderon
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
| | - M. V. C. Rudge
- Laboratory of Experimental Research on Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School, Universidade Estadual Paulista (Unesp), 18618-970 Botucatu, SP, Brazil
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Cisse O, Fajardy I, Dickes-Coopman A, Moitrot E, Montel V, Deloof S, Rousseaux J, Vieau D, Laborie C. Mild gestational hyperglycemia in rat induces fetal overgrowth and modulates placental growth factors and nutrient transporters expression. PLoS One 2013; 8:e64251. [PMID: 23691181 PMCID: PMC3653871 DOI: 10.1371/journal.pone.0064251] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Accepted: 04/14/2013] [Indexed: 12/30/2022] Open
Abstract
Mild gestational hyperglycemia is often associated with fetal overgrowth that can predispose the offspring to metabolic diseases later in life. We hypothesized that unfavorable intrauterine environment may compromise the development of placenta and contribute to fetal overgrowth. Therefore, we developed a rat model and investigated the effects of maternal dysglycemia on fetal growth and placental gene expression. Female rats were treated with single injection of nicotinamide plus streptozotocin (N-STZ) 1-week before mating and were studied at gestational day 21. N-STZ pregnant females displayed impaired glucose tolerance that is associated with a lower insulin secretion. Moderate hyperglycemia induced fetal overgrowth in 40% of newborns, from pregnancies with 10 to 14 pups. The incidence of macrosomia was less than 5% in the N-STZ pregnancies when the litter size exceeds 15 newborns. We found that placental mass and the labyrinthine layer were increased in macrosomic placentas. The expression of genes involved in placental development and nutrient transfer was down regulated in the N-STZ placentas of macrosomic and normosomic pups from pregnancies with 10 to 14 ones. However, we observed that lipoprotein lipase 1 (LPL1) gene expression was significantly increased in the N-STZ placentas of macrosomic pups. In pregnancies with 15 pups or more, the expression of IGFs and glucose transporter genes was also modulated in the control placentas with no additional effect in the N-STZ ones. These data suggest that placental gene expression is modulated by gestational conditions that might disrupt the fetal growth. We described here a new model of maternal glucose intolerance that results in fetal overgrowth. We proposed that over-expression of LPL1 in the placenta may contribute to the increased fetal growth in the N-STZ pregnancies. N-STZ model offers the opportunity to determinate whether these neonatal outcomes may contribute to developmental programming of metabolic diseases in adulthood.
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Affiliation(s)
- Ouma Cisse
- Unité Environnement Périnatal et Croissance, EA 4489, Université Lille Nord de France, Lille, France
| | - Isabelle Fajardy
- Unité Environnement Périnatal et Croissance, EA 4489, Université Lille Nord de France, Lille, France
- Pôle de Biochimie et Biologie Moléculaire, Centre de Biologie et de Pathologie, Lille, France
| | - Anne Dickes-Coopman
- Unité Environnement Périnatal et Croissance, EA 4489, Université Lille Nord de France, Lille, France
| | - Emmanuelle Moitrot
- Unité Environnement Périnatal et Croissance, EA 4489, Université Lille Nord de France, Lille, France
- Pôle de Biochimie et Biologie Moléculaire, Centre de Biologie et de Pathologie, Lille, France
| | - Valérie Montel
- Unité Environnement Périnatal et Croissance, EA 4489, Université Lille Nord de France, Lille, France
| | - Sylvie Deloof
- Unité Environnement Périnatal et Croissance, EA 4489, Université Lille Nord de France, Lille, France
| | - Jean Rousseaux
- Unité Environnement Périnatal et Croissance, EA 4489, Université Lille Nord de France, Lille, France
- Pôle de Biochimie et Biologie Moléculaire, Centre de Biologie et de Pathologie, Lille, France
| | - Didier Vieau
- Unité Environnement Périnatal et Croissance, EA 4489, Université Lille Nord de France, Lille, France
| | - Christine Laborie
- Unité Environnement Périnatal et Croissance, EA 4489, Université Lille Nord de France, Lille, France
- * E-mail:
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Hokke SN, Armitage JA, Puelles VG, Short KM, Jones L, Smyth IM, Bertram JF, Cullen-McEwen LA. Altered ureteric branching morphogenesis and nephron endowment in offspring of diabetic and insulin-treated pregnancy. PLoS One 2013; 8:e58243. [PMID: 23516451 PMCID: PMC3596403 DOI: 10.1371/journal.pone.0058243] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 01/31/2013] [Indexed: 12/11/2022] Open
Abstract
There is strong evidence from human and animal models that exposure to maternal hyperglycemia during in utero development can detrimentally affect fetal kidney development. Notwithstanding this knowledge, the precise effects of diabetic pregnancy on the key processes of kidney development are unclear due to a paucity of studies and limitations in previously used methodologies. The purpose of the present study was to elucidate the effects of hyperglycemia on ureteric branching morphogenesis and nephrogenesis using unbiased techniques. Diabetes was induced in pregnant C57Bl/6J mice using multiple doses of streptozotocin (STZ) on embryonic days (E) 6.5-8.5. Branching morphogenesis was quantified ex vivo using Optical Projection Tomography, and nephrons were counted using unbiased stereology. Maternal hyperglycemia was recognised from E12.5. At E14.5, offspring of diabetic mice demonstrated fetal growth restriction and a marked deficit in ureteric tip number (control 283.7±23.3 vs. STZ 153.2±24.6, mean±SEM, p<0.01) and ureteric tree length (control 33.1±2.6 mm vs. STZ 17.6±2.7 mm, p = 0.001) vs. controls. At E18.5, fetal growth restriction was still present in offspring of STZ dams and a deficit in nephron endowment was observed (control 1246.2±64.9 vs. STZ 822.4±74.0, p<0.001). Kidney malformations in the form of duplex ureter and hydroureter were a common observation (26%) in embryos of diabetic pregnancy compared with controls (0%). Maternal insulin treatment from E13.5 normalised maternal glycaemia but did not normalise fetal weight nor prevent the nephron deficit. The detrimental effect of hyperglycemia on ureteric branching morphogenesis and, in turn, nephron endowment in the growth-restricted fetus highlights the importance of glycemic control in early gestation and during the initial stages of renal development.
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Affiliation(s)
- Stacey N. Hokke
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia
| | - James A. Armitage
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia
- School of Medicine (Optometry), Deakin University, Waurn Ponds, Victoria, Australia
| | - Victor G. Puelles
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia
| | - Kieran M. Short
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia
| | - Lynelle Jones
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia
| | - Ian M. Smyth
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia
| | - John F. Bertram
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia
| | - Luise A. Cullen-McEwen
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia
- * E-mail:
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Khan RA, Khan MR, Sahreen S, Ahmed M, Shah NA. Carbon tetrachloride-induced lipid peroxidation and hyperglycemia in rat: a novel study. Toxicol Ind Health 2013; 31:546-53. [PMID: 23416881 DOI: 10.1177/0748233713475503] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Launaea procumbens methanol extract (LPME) was evaluated against carbon tetrachloride (CCl4)-induced pancreatic oxidative damage and hyperglycemia in rats. Various doses of the extract were administered to rats after 48 h of CCl4 treatment (3 ml/kg bodyweight (bw); intraperitoneally, 20% CCl4/olive oil) twice a week for 4 weeks. Coadministration of various concentrations of LPME (100, 150 and 200 mg/kg) ameliorated the toxicity of CCl4 and reversed the serum level of enzymes (amylase and lipase), glucose and hormone (insulin). The extract was able to reduce thiobarbituric acid reactive substance but increased the glutathione contents in pancreatic tissue. Depletion of antioxidant enzyme activities (catalase, peroxidase, superoxide dismutase, glutathione peroxidase, glutathione-S-transferase and glutathione-S-reductase) and DNA damages induced with CCl4 were restored by LPME supplement. It is suggested that LPME effectively protects the liver against the CCl4-induced oxidative damage in rats, possibly through antioxidant and/or free radical scavenging effects of flavonoids and phenolic compounds in the extract.
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Affiliation(s)
- Rahmat Ali Khan
- Faculty of Biological Sciences, Department of Biotechnology, University of Science and Technology Bannu, Khyber Pakhtunkhwa, Pakistan Faculty of Biological Sciences, Department of Biochemistry, Quaid-i-Azam University Islamabad, Pakistan
| | - Muhammad Rashid Khan
- Faculty of Biological Sciences, Department of Biochemistry, Quaid-i-Azam University Islamabad, Pakistan
| | - Sumaira Sahreen
- Faculty of Biological Sciences, Department of Biochemistry, Quaid-i-Azam University Islamabad, Pakistan
| | - Mushtaq Ahmed
- Faculty of Biological Sciences, Department of Biotechnology, University of Science and Technology Bannu, Khyber Pakhtunkhwa, Pakistan
| | - Naseer Ali Shah
- Faculty of Biological Sciences, Department of Biochemistry, Quaid-i-Azam University Islamabad, Pakistan
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Harville EW, Srinivasan S, Chen W, Berenson GS. Is the metabolic syndrome a "small baby" syndrome?: the bogalusa heart study. Metab Syndr Relat Disord 2012; 10:413-21. [PMID: 22831273 DOI: 10.1089/met.2012.0031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Metabolic syndrome has been called a "small baby syndrome," but other analyses suggest that postnatal growth is more important than birthweight, or that large babies are also at risk. The aim of this analysis was to examine whether there was a relationship between both low and high birthweight and metabolic syndrome, using multiple definitions of metabolic syndrome, and to determine whether this relationship varied by body size across the life course. METHODS Data from the Bogalusa Heart Study, a study of cardiovascular disease in children and young adults, were linked to birth certificate data. Metabolic syndrome was defined by the National Cholesterol Education Program, the International Diabetes Foundation, and the World Health Organization (WHO) definition. Small-for-gestational-age (SGA) was defined as birthweight <10(th) percentile by sex for gestational age and large-for-gestational-age (LGA) as birthweight >90(th) percentile. Birthweight-for-gestational-age was also examined as a continuous predictor. Chi-squared tests and logistic regression were used to examine the relationship between birth size and metabolic syndrome. RESULTS Higher birthweight-for-gestational-age was associated with a reduced risk of metabolic syndrome, especially by the WHO definition. After adjustment for body mass index (BMI), categorized birthweight was associated with metabolic syndrome, with the protective associations with LGA being stronger than the positive associations with SGA. Among the individual components of metabolic syndrome, higher waist circumference was associated with both SGA and LGA after BMI was controlled for. Effects of SGA and BMI at any age were largely independent rather than interactive. CONCLUSIONS SGA is associated with some, but not all, components of metabolic syndrome. The relationship between SGA and metabolic syndrome is partially confounded by later BMI.
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Affiliation(s)
- Emily W Harville
- Department of Epidemiology, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA 70112, USA.
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Severe maternal hyperglycemia exacerbates the development of insulin resistance and fatty liver in the offspring on high fat diet. EXPERIMENTAL DIABETES RESEARCH 2012; 2012:254976. [PMID: 22566993 PMCID: PMC3332175 DOI: 10.1155/2012/254976] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Revised: 02/05/2012] [Accepted: 02/16/2012] [Indexed: 02/07/2023]
Abstract
BACKGROUND Adverse maternal environments may predispose the offspring to metabolic syndrome in adulthoods, but the underlying mechanism has not been fully understood. METHODS Maternal hyperglycemia was induced by streptozotocin (STZ) injection while control (CON) rats received citrate buffer. Litters were adjusted to eight pups per dam and then weaned to standard diet. Since 13 weeks old, a subset of offspring from STZ and CON dams were switched to high fat diet (HFD) for another 13 weeks. Glucose and insulin tolerance tests (GTT and ITT) and insulin secretion assay were performed; serum levels of lipids and leptin were measured. Hepatic fat accumulation and islet area were evaluated through haematoxylin and eosin staining. RESULTS STZ offspring exhibited lower survival rate, lower birth weights, and growth inhibition which persisted throughout the study. STZ offspring on HFD showed more severe impairment in GTT and ITT, and more profound hepatic steatosis and more severe hyperlipidemia compared with CON-HFD rats. CONCLUSIONS Offspring from diabetic dams would be prone to exhibit low birth weight and postnatal growth inhibition, but could maintain normal glucose tolerance and insulin sensitivity. HFD accelerates development of insulin resistance in the offspring of diabetic dams mainly via a compensatory response of islets.
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Damasceno DC, Sinzato YK, Lima PH, de Souza MS, Campos KE, Dallaqua B, Calderon IM, Rudge MV, Volpato GT. Effects of exposure to cigarette smoke prior to pregnancy in diabetic rats. Diabetol Metab Syndr 2011; 3:20. [PMID: 21851636 PMCID: PMC3170573 DOI: 10.1186/1758-5996-3-20] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Accepted: 08/18/2011] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND The purpose of this study was to evaluate the effects of cigarette smoke exposure before pregnancy on diabetic rats and their offspring development. METHODS Diabetes was induced by streptozotocin and cigarette smoke exposure was conducted by mainstream smoke generated by a mechanical smoking device and delivered into a chamber. Diabetic female Wistar rats were randomly distributed in four experimental groups (n minimum = 13/group): nondiabetic (ND) and diabetic rats exposed to filtered air (D), diabetic rats exposed to cigarette smoke prior to and into the pregnancy period (DS) and diabetic rats exposed to cigarette smoke prior to pregnancy period (DSPP). At day 21 of pregnancy, rats were killed for maternal biochemical determination and reproductive outcomes. RESULTS The association of diabetes and cigarette smoke in DSPP group caused altered glycemia at term, reduced number of implantation and live fetuses, decreased litter and maternal weight, increased pre and postimplantation loss rates, reduced triglyceride and VLDL-c concentrations, increased levels of thiol groups and MDA. Besides, these dams presented increased SOD and GSH-Px activities. However, the increased antioxidant status was not sufficient to prevent the lipid peroxidation observed in these animals. CONCLUSION Despite the benefits stemming from smoking interruption during the pregnancy of diabetic rats, such improvement was insufficient to avoid metabolic alterations and provide an adequate intrauterine environment for embryofetal development. Therefore, these results suggest that it is necessary to cease smoking extensive time before planning pregnancy, since stopping smoking only when pregnancy is detected may not contribute effectively to fully adequate embryofetal development.
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Affiliation(s)
- Débora C Damasceno
- Botucatu Medical School, UNESP - Univ Estadual Paulista, Department of Gynecology and Obstetrics, Laboratory of Experimental Research in Gynecology and Obstetrics, São Paulo State, Brazil
| | - Yuri K Sinzato
- Botucatu Medical School, UNESP - Univ Estadual Paulista, Department of Gynecology and Obstetrics, Laboratory of Experimental Research in Gynecology and Obstetrics, São Paulo State, Brazil
| | - Paula H Lima
- Botucatu Medical School, UNESP - Univ Estadual Paulista, Department of Gynecology and Obstetrics, Laboratory of Experimental Research in Gynecology and Obstetrics, São Paulo State, Brazil
| | - Maricelma S de Souza
- Botucatu Medical School, UNESP - Univ Estadual Paulista, Department of Gynecology and Obstetrics, Laboratory of Experimental Research in Gynecology and Obstetrics, São Paulo State, Brazil
- Pharmacology Department, University of Marilia_UNIMAR, Marilia, São Paulo State, Brazil
| | - Kleber E Campos
- Botucatu Medical School, UNESP - Univ Estadual Paulista, Department of Gynecology and Obstetrics, Laboratory of Experimental Research in Gynecology and Obstetrics, São Paulo State, Brazil
- Institute of Biological and Health Sciences, University Center of Araguaia, Mato Grosso Federal University (UFMT), Mato Grosso, Brazil
| | - Bruna Dallaqua
- Botucatu Medical School, UNESP - Univ Estadual Paulista, Department of Gynecology and Obstetrics, Laboratory of Experimental Research in Gynecology and Obstetrics, São Paulo State, Brazil
| | - Iracema M Calderon
- Botucatu Medical School, UNESP - Univ Estadual Paulista, Department of Gynecology and Obstetrics, Laboratory of Experimental Research in Gynecology and Obstetrics, São Paulo State, Brazil
| | - Marilza V Rudge
- Botucatu Medical School, UNESP - Univ Estadual Paulista, Department of Gynecology and Obstetrics, Laboratory of Experimental Research in Gynecology and Obstetrics, São Paulo State, Brazil
| | - Gustavo T Volpato
- Botucatu Medical School, UNESP - Univ Estadual Paulista, Department of Gynecology and Obstetrics, Laboratory of Experimental Research in Gynecology and Obstetrics, São Paulo State, Brazil
- Institute of Biological and Health Sciences, University Center of Araguaia, Mato Grosso Federal University (UFMT), Mato Grosso, Brazil
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Madkor HR, Mansour SW, Ramadan G. Modulatory effects of garlic, ginger, turmeric and their mixture on hyperglycaemia, dyslipidaemia and oxidative stress in streptozotocin-nicotinamide diabetic rats. Br J Nutr 2011; 105:1210-7. [PMID: 21144104 DOI: 10.1017/s0007114510004927] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Spices which show hypoglycaemic, hypolipidaemic and antioxidant activities may have a role in the treatment of diabetes and its complications. The present study aimed to compare the modulatory effects of garlic, ginger, turmeric and their mixture on the metabolic syndrome and oxidative stress in streptozotocin (STZ)-nicotinamide diabetic rats. Diabetes was induced in overnight fasted rats by a single intraperitoneal injection of STZ (65 mg/kg body weight) and nicotinamide (110 mg/kg body weight, 15 min before STZ injection). Diabetic rats orally received either distilled water (as vehicle) or 200 mg/kg body weight of garlic bulb, ginger rhizome or turmeric rhizome powder suspension separately or mixed together (GGT mixture) for twenty-eight consecutive days. The results showed that these spices and their mixture significantly alleviated (80-97 %, P < 0·05-0·001) signs of the metabolic syndrome (hyperglycaemia and dyslipidaemia), the elevation in atherogenic indices and cellular toxicity in STZ-nicotinamide diabetic rats by increasing the production of insulin (26-37 %), enhancing the antioxidant defence system (31-52 %, especially GSH) and decreasing lipid peroxidation (60-97 %). The greatest modulation was seen in diabetic rats that received garlic and the GGT mixture (10-23 % more than that in the ginger and turmeric groups). In conclusion, garlic or the mix including garlic appears to have an impact on each of the measures more effectively than ginger and turmeric and may have a role in alleviating the risks of the metabolic syndrome and cardiovascular complications.
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Affiliation(s)
- Hafez R Madkor
- Biomedical Science Department, College of Clinical Pharmacy, King Faisal University, Al-Hufof, Kingdom of Saudi Arabia
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Sinzato Y, Damasceno D, Laufer-Amorim R, Rodrigues M, Oshiiwa M, Taylor K, Rudge M. Plasma concentrations and placental immunostaining of interleukin-10 and tumornecrosis factor-α as predictors of alterations in the embryo-fetal organism and the placental development of diabetic rats. Braz J Med Biol Res 2011; 44:206-11. [DOI: 10.1590/s0100-879x2011007500015] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2010] [Accepted: 01/06/2011] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | | | | | - M. Oshiiwa
- Centro Estadual de Tecnologia e Educação Paula Souza, Faculdade de Tecnologia, Brasil
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Yessoufou A, Moutairou K, Khan NA. A model of insulin resistance in mice, born to diabetic pregnancy, is associated with alterations of transcription-related genes in pancreas and epididymal adipose tissue. J Obes 2011; 2011:654967. [PMID: 20936114 PMCID: PMC2948918 DOI: 10.1155/2011/654967] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Accepted: 08/30/2010] [Indexed: 01/22/2023] Open
Abstract
Objective. This study is conducted on a model of insulin-resistant (IR) mice born to dams which were rendered diabetic by the administration of streptozotocin. Methods. Adult IR and control offspring were selected and we determined the mRNA expression of transcription factors known to modulate pancreatic and adipose tissue activities and inflammation. Results. We observed that serum insulin increased, and the mRNA of insulin gene transcription factors, Pdx-1, Nkx6.1 and Maf-A, were upregulated in IR mice pancreas. Besides, their pancreatic functional capacity seemed to be exhausted as evidenced by low expression of pancreatic Glut2 and glucokinase mRNA. Though IR offspring exhibited reduced epididymal adipose tissue, their adipocytes seemed to be differentiated into macrophage-like cells, as they exhibited upregulated CD14 and CD68 antigens, generally expressed by macrophages. However, there was no peripheral macrophages infiltration into epididymal adipose tissue, as the expression of F4/80, a true macrophage marker, was undetectable. Furthermore, the expression of IL-6, TNF-α and TLR-2, key players of insulin resistance, was upregulated in the adipose tissue of IR offspring. Conclusion. Insulin resistant state in mice, born to diabetic pregnancy, alters the expression of function-related genes in pancreas and epididymal adipose tissue and these offspring are prone to develop metabolic syndrome.
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Affiliation(s)
- Akadiri Yessoufou
- Faculty of Life Sciences, University of Bourgogne, UPRES EA 4183 Lipides et Signalisation Cellulaire, 6 Boulevard Gabriel, 21000 Dijon, France
- Laboratory of Cell Biology and Physiology, Department of Biochemistry and Cellular Biology, Faculty of Sciences and Techniques, University of Abomey-Calavi and Institute of Biomedical and Applied Sciences (ISBA), 01 BP 918 Cotonou, Benin
- Centre for Integrative Genomics, University of Lausanne, Bâtiment Génopode, 5è Etage, 1015 Lausanne, Switzerland
- *Akadiri Yessoufou:
| | - Kabirou Moutairou
- Laboratory of Cell Biology and Physiology, Department of Biochemistry and Cellular Biology, Faculty of Sciences and Techniques, University of Abomey-Calavi and Institute of Biomedical and Applied Sciences (ISBA), 01 BP 918 Cotonou, Benin
| | - Naim Akhtar Khan
- Faculty of Life Sciences, University of Bourgogne, UPRES EA 4183 Lipides et Signalisation Cellulaire, 6 Boulevard Gabriel, 21000 Dijon, France
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Abstract
There are many instances in life when the environment plays a critical role in the health outcomes of an individual, yet none more so than those experienced in fetal and neonatal life. One of the most detrimental environmental problems encountered during this critical growth period are changes in nutrition to the growing fetus and newborn. Disturbances in the supply of nutrients and oxygen to the fetus can not only lead to adverse fetal growth patterns, but they have also been associated with the development of features of metabolic syndrome in adult life. This fetal response has been termed developmental programming or the developmental origins of health and disease. The present review focuses on the epidemiological studies that identified this association and the importance that animal models have played in studying this concept. We also address the potential mechanisms that may underpin the developmental programming of future disease. It also highlights (i) how developmental plasticity, although beneficial for short-term survival, can subsequently programme glucose intolerance and insulin resistance in adult life by eliciting changes in key organ structures and the epigenome, and (ii) how aberrant mitochondrial function can potentially lead to the development of Type 2 diabetes and other features of metabolic syndrome.
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Affiliation(s)
- Matthew J Warner
- Institute of Metabolic Science, Addenbrooke's Hospital, University of Cambridge, UK
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Kanter M, Akpolat M, Aktas C. Protective effects of the volatile oil of Nigella sativa seeds on beta-cell damage in streptozotocin-induced diabetic rats: a light and electron microscopic study. J Mol Histol 2010; 40:379-85. [PMID: 20049514 DOI: 10.1007/s10735-009-9251-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2009] [Accepted: 12/21/2009] [Indexed: 11/24/2022]
Abstract
The aim of this study was to evaluate the possible protective effects of the volatile oil of Nigella sativa (NS) seeds on insulin immunoreactivity and ultrastructural changes of pancreatic beta-cells in STZ-induced diabetic rats. STZ was injected intraperitoneally at a single dose of 50 mg/kg to induce diabetes. The rats in NS treated groups were given NS (0.2 ml/kg) once a day orally for 4 weeks starting 3 days prior to STZ injection. To date, no ultrastructural changes of pancreatic beta-cells in STZ induced diabetic rats by NS treatment have been reported. Islet cell degeneration and weak insulin immunohistochemical staining was observed in rats with STZ-induced diabetes. Increased intensity of staining for insulin, and preservation of beta-cell numbers were apparent in the NS-treated diabetic rats. The protective effect of NS on STZ-diabetic rats was evident by a moderate increase in the lowered secretory vesicles with granules and also slight destruction with loss of cristae within the mitochondria of beta-cell when compared to control rats. These findings suggest that NS treatment exerts a therapeutic protective effect in diabetes by decreasing morphological changes and preserving pancreatic beta-cell integrity. Consequently, NS may be clinically useful for protecting beta-cells against oxidative stress.
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Affiliation(s)
- Mehmet Kanter
- Department of Histology and Embryology, Faculty of Medicine, Trakya University, Edirne 22030, Turkey.
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Kiss ACI, Lima PHO, Sinzato YK, Takaku M, Takeno MA, Rudge MVC, Damasceno DC. Animal models for clinical and gestational diabetes: maternal and fetal outcomes. Diabetol Metab Syndr 2009; 1:21. [PMID: 19840387 PMCID: PMC2770456 DOI: 10.1186/1758-5996-1-21] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2009] [Accepted: 10/19/2009] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Diabetes in pregnant women is associated with an increased risk of maternal and neonatal morbidity and remains a significant medical challenge. Diabetes during pregnancy may be divided into clinical diabetes and gestational diabetes. Experimental models are developed with the purpose of enhancing understanding of the pathophysiological mechanisms of diseases that affect humans. With regard to diabetes in pregnancy, experimental findings from models will lead to the development of treatment strategies to maintain a normal metabolic intrauterine milieu, improving perinatal development by preventing fetal growth restriction or macrosomia. Based on animal models of diabetes during pregnancy previously reported in the medical literature, the present study aimed to compare the impact of streptozotocin-induced severe (glycemia >300 mg/dl) and mild diabetes (glycemia between 120 and 300 mg/dl) on glycemia and maternal reproductive and fetal outcomes of Wistar rats to evaluate whether the animal model reproduces the maternal and perinatal results of clinical and gestational diabetes in humans. METHODS On day 5 of life, 96 female Wistar rats were assigned to three experimental groups: control (n = 16), severe (n = 50) and mild diabetes (n = 30). At day 90 of life, rats were mated. On day 21 of pregnancy, rats were killed and their uterine horns were exposed to count implantation and fetus numbers to determine pre- and post-implantation loss rates. The fetuses were classified according to their birth weight. RESULTS Severe and mild diabetic dams showed different glycemic responses during pregnancy, impairing fetal glycemia and weight, confirming that maternal glycemia is directly associated with fetal development. Newborns from severe diabetic mothers presented growth restriction, but mild diabetic mothers were not associated with an increased rate of macrosomic fetuses. CONCLUSION Experimental models of severe diabetes during pregnancy reproduced maternal and fetal outcomes of pregnant women presenting uncontrolled clinical diabetes. On the other hand, the mild diabetes model caused mild hyperglycemia during pregnancy, although it was not enough to reproduce the increased rate of macrosomic fetuses seen in women with gestational diabetes.
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Affiliation(s)
- Ana CI Kiss
- Laboratory of Experimental Research of Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School - São Paulo State University (Unesp), Botucatu, São Paulo, Brazil
| | - Paula HO Lima
- Laboratory of Experimental Research of Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School - São Paulo State University (Unesp), Botucatu, São Paulo, Brazil
| | - Yuri K Sinzato
- Laboratory of Experimental Research of Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School - São Paulo State University (Unesp), Botucatu, São Paulo, Brazil
| | - Mariana Takaku
- Laboratory of Experimental Research of Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School - São Paulo State University (Unesp), Botucatu, São Paulo, Brazil
| | - Marisa A Takeno
- Laboratory of Experimental Research of Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School - São Paulo State University (Unesp), Botucatu, São Paulo, Brazil
| | - Marilza VC Rudge
- Laboratory of Experimental Research of Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School - São Paulo State University (Unesp), Botucatu, São Paulo, Brazil
| | - Débora C Damasceno
- Laboratory of Experimental Research of Gynecology and Obstetrics, Department of Gynecology and Obstetrics, Botucatu Medical School - São Paulo State University (Unesp), Botucatu, São Paulo, Brazil
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Khan NA. Role of lipids and fatty acids in macrosomic offspring of diabetic pregnancy. Cell Biochem Biophys 2007; 48:79-88. [PMID: 17709877 DOI: 10.1007/s12013-007-0019-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/1999] [Revised: 11/30/1999] [Accepted: 11/30/1999] [Indexed: 12/21/2022]
Abstract
Diabetic pregnancy frequently results in macrosomia or fetal obesity. It seems that the anomalies in carbohydrate and lipid metabolism in macrosomic infants of diabetic mothers are due to maternal hyperglycemia, which leads to fetal hyperinsulinemia. We have developed a rat model of macrosomic offspring and assessed the onset of obesity in these animals. The macrosomic offspring born to diabetic mothers are prone to the development of glucose intolerance and obesity as a function of age. It seems that in utero programming during diabetic pregnancy creates a "metabolic memory" which is responsible for the development of obesity in macrosomic offspring. We have demonstrated that the metabolism of lipids, and altered anti-oxidant status and immune system are implicated in the etiopathology of obesity in these animals. We have reported beneficial effects of n-3 polyunsaturated fatty acids (PUFAs) in obese animals, born to diabetic dams.
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Affiliation(s)
- Naim Akhtar Khan
- Department of Physiology, UPRES Lipides & Signalisation Cellulaire, Université de Bourgogne, Dijon, France.
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Adewole SO, Caxton-Martins EA, Ojewole JAO. Protective effect of quercetin on the morphology of pancreatic beta-cells of streptozotocin-treated diabetic rats. AFRICAN JOURNAL OF TRADITIONAL, COMPLEMENTARY, AND ALTERNATIVE MEDICINES : AJTCAM 2006; 4:64-74. [PMID: 20162074 PMCID: PMC2816429 DOI: 10.4314/ajtcam.v4i1.31196] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
This study was undertaken to investigate the protective effects of quercetin (QCT) on the morphology of pancreatic beta-cells against diabetes mellitus and oxidative stress experimentally-induced by streptozotocin (STZ) treatment in Wistar rats. Fifty male and female Wistar rats (200-250 g) were randomly divided into three experimental groups (i. e., control, STZ-treated, and STZ + Quercetin-treated groups). Diabetes was induced in the diabetic groups (B and C) of animals, by a single intraperitoneal injection of STZ (75 mg/kg), while each of the rats in the 'control' group received equal volume of citrate buffer (pH 6.3) solution intraperitoneally. In group C rats, quercetin (QCT, 25 mg/kg/day i.p.) was injected daily for 3 days prior to STZ treatment, and QCT administration continued until the end of the study period (30 days). Diabetes mellitus was confirmed by using Bayer's Glucometer Elite and compatible blood glucose test strips. The rats were sacrificed serially until the end of the study period (after 30 days). The pancreases of the sacrificed rats were excised and randomly processed for histological staining and biochemical assays for antioxidant enzymes [such as glutathione peroxidase (GSHPx), superoxide dismutase (SOD), catalase (CAT), malondialdehyde (MDA) and serum nitric oxide (NO)]. In the diabetic state, pancreatic beta-cells of STZ-treated group B rats histologically demonstrated an early chromatin aggregation, cytoplasmic vesiculation in the central beta-cells, nuclear shrinkage, and lysis of beta-cells with distortion of granules. The morphology of QCT-treated rats' pancreases showed viable cellularity with distinct beta-cell mass. STZ treatment significantly decreased (p<0.05) GSHPx, SOD, CAT and pancreatic insulin content. However, STZ treatment increased blood glucose concentrations, MDA and serum NO. The QCT-treated group of animals showed a significant decrease (p<0.05) in elevated blood glucose, MDA and NO. Furthermore, QCT treatment significantly increased (p<0.05) antioxidant enzymes' activities, as well as pancreatic insulin contents. Quercetin (QCT) treatment protected and preserved pancreatic beta-cell architecture and integrity. In conclusion, the findings of the present experimental animal study indicate that QCT treatment has beneficial effects on pancreatic tissues subjected to STZ-induced oxidative stress by directly quenching lipid peroxides and indirectly enhancing production of endogenous antioxidants.
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Affiliation(s)
- Stephen O Adewole
- Department of Anatomy and Cell Biology, Faculty of Basic Medical Sciences, College of Health Sciences, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria
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Kanter M, Uysal H, Karaca T, Sagmanligil HO. Depression of glucose levels and partial restoration of pancreatic beta-cell damage by melatonin in streptozotocin-induced diabetic rats. Arch Toxicol 2005; 80:362-9. [PMID: 16341692 DOI: 10.1007/s00204-005-0055-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2005] [Accepted: 11/16/2005] [Indexed: 10/25/2022]
Abstract
Diabetes mellitus is a common but serious metabolic disorder associated with many functional and structural complications. Glucose metabolism is disturbed due to an absolute or relative insulin deficiency. The experiment was carried out to determine the effect of melatonin on blood glucose and insulin concentrations, and histopathology of pancreatic beta-cells in streptozotocin (STZ)-induced diabetic rats. The rats were randomly allocated into one of the four experimental groups: group A (control), group B (diabetic untreated), group C (diabetic treated with melatonin for 6 weeks) and group D (diabetic treated with melatonin for 8 weeks); each group contained ten animals. Diabetes was induced in B, C and D groups by a single intraperitoneal (i.p.) injection of STZ (50 mg/kg, freshly dissolved in 5 mmol/l citrate buffer, pH 4.5). The rats in melatonin-treated groups were subjected to the daily i.p injection of 10 mg kg(-1) of melatonin for 6 or 8 weeks starting the day after STZ injection. Control and diabetic untreated rats were injected with the same volume of isotonic NaCl as the melatonin treated groups. Almost all insulin-positive beta-cells were degranulated, degenerated or necrotic in the STZ-treated rats leading to decrease in insulin secretion and an increase in blood glucose concentration. Melatonin treatment caused a sharp decrease in the elevated serum glucose, a slight increase in the lowered serum insulin concentrations and small partial regeneration/proliferation of beta-cells of islets. It is concluded that the hypoglycemic action of melatonin could be partly due to small amelioration in the beta-cells of pancreatic islets causing a slight increase in insulin secretion, it is mostly due to the extrapancreatic actions of the melatonin.
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Affiliation(s)
- Mehmet Kanter
- Department of Histology-Embryology, Faculty of Medicine, Trakya University, Edirne, Turkey.
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Age-related changes in cholesterol metabolism in macrosomic offspring of rats with streptozotocin-induced diabetes. J Lipid Res 2001. [DOI: 10.1016/s0022-2275(20)31606-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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