1
|
Lützhøft DO, Bækgård C, Wimborne E, Straarup EM, Pedersen KM, Swann JR, Pedersen HD, Kristensen K, Morgills L, Nielsen DS, Hansen AK, Bracken MK, Cirera S, Christoffersen BØ. High fat diet is associated with gut microbiota dysbiosis and decreased gut microbial derived metabolites related to metabolic health in young Göttingen Minipigs. PLoS One 2024; 19:e0298602. [PMID: 38427692 PMCID: PMC10906878 DOI: 10.1371/journal.pone.0298602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 01/26/2024] [Indexed: 03/03/2024] Open
Abstract
The objectives were 1) to characterize a Göttingen Minipig model of metabolic syndrome regarding its colon microbiota and circulating microbial products, and 2) to assess whether ovariectomized female and castrated male minipigs show similar phenotypes. Twenty-four nine-week-old Göttingen Minipigs were allocated to four groups based on sex and diet: ovariectomized females and castrated males fed either chow or high-fat diet (HFD) for 12 weeks. At study end, body composition and plasma biomarkers were measured, and a mixed meal tolerance test (MMT) and an intravenous glucose tolerance test (IVGTT) were performed. The HFD groups had significantly higher weight gain, fat percentage, fasting plasma insulin and glucagon compared to the chow groups. Homeostatic model assessment of insulin resistance index (HOMA-IR) was increased and glucose effectiveness derived from the IVGTT and Matsuda´s insulin sensitivity index from the MMT were decreased in the HFD groups. The HFD groups displayed dyslipidemia, with significantly increased total-, LDL- and HDL-cholesterol, and decreased HDL/non-HDL cholesterol ratio. The colon microbiota of HFD minipigs clearly differed from the lean controls (GuniFrac distance matrix). The main bacteria families driving this separation were Clostridiaceae, Fibrobacteraceae, Flavobacteriaceae and Porphyromonadaceae. Moreover, the species richness was significantly decreased by HFD. In addition, HFD decreased the circulating level of short chain fatty acids and beneficial microbial metabolites hippuric acid, xanthine and trigonelline, while increasing the level of branched chain amino acids. Six and nine metabolically relevant genes were differentially expressed between chow-fed and HFD-fed animals in liver and omental adipose tissue, respectively. The HFD-fed pigs presented with metabolic syndrome, gut microbial dysbiosis and a marked decrease in healthy gut microbial products and thus displayed marked parallels to human obesity and insulin resistance. HFD-fed Göttingen Minipig therefore represents a relevant animal model for studying host-microbiota interactions. No significant differences between the castrated and ovariectomized minipigs were observed.
Collapse
Affiliation(s)
- Ditte Olsen Lützhøft
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Cecilie Bækgård
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Elizabeth Wimborne
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | | | | | - Jonathan R. Swann
- School of Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | | | | | | | - Dennis Sandris Nielsen
- Department of Food Science, Faculty of Science, University of Copenhagen, Frederiksberg C, Denmark
| | - Axel Kornerup Hansen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | | | - Susanna Cirera
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | | |
Collapse
|
2
|
Zhao Y, Niu M, Jia Y, Yuan J, Xiang L, Dai X, Wang G, Chen H. Establishment of type 2 diabetes mellitus models using streptozotocin after 3 months high-fat diet in Bama minipigs. Anim Biotechnol 2023; 34:2295-2312. [PMID: 35749713 DOI: 10.1080/10495398.2022.2088548] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
In the past twenty years, the number of adults with diabetes has tripled. Most studies have been conducted using rodent models of type 2 diabetes mellitus (T2DM), and the developed drugs have low clinical conversion efficiency. Therefore, it is urgent to establish a more human-like large animal model to explore T2DM pathogenesis and formulate new disease prevention and control strategies. This study was designed to establish and validate a T2DM model using minipigs fed a high-fat or high-cholesterol/high-fat diet and injected with low-dose streptozotocin (STZ). We examined the influence of the STZ injection timing with a diet high in fat (HFD) compared with one high in cholesterol and fat (HCFD) on the atherosclerotic lesions accelerated by T2DM. Male Bama minipigs (n = 24) were randomly divided into five groups. The control group was fed a normal diet for 9 months. The STZ + HFD and STZ + HCFD groups were infused with 90 mg/kg STZ and then fed a high-fat diet or high-cholesterol and high-fat diet for 9 months, respectively. The HFD + STZ and HCFD + STZ groups were fed a high-fat diet or a high-cholesterol and high-fat diet, respectively, for 9 months (after 3 months, these pigs were injected intravenously with 90 mg/kg STZ). During the induction period, animal body weight, BMI, and serum GLU, INS, TG, TC, HDL-C, LDL-C, FFA, ALT, AST, CRE, and BUN were detected monthly intervals. IVGTT and insulin release tests were performed at 3-month intervals. At the end of the test, the coronary artery and abdominal aorta were examined by computed tomography and pathological observations, and the thickness of the basement membrane of the capillary of the retina and kidney glomerulus was measured under a transmission electron microscope. The serum glucose concentrations were normal in all groups except the HFD + STZ and HCFD + STZ groups. Animals fed an HFD for 9 months did not develop apparent atherosclerotic lesions, but atherosclerotic lesions were seen in the animals fed an HCFD. Hyperglycemia accelerated the formation of atherosclerotic lesions on the intimal surface of the abdominal aorta. Low-dose STZ after 3 months of HFD or HCFD successfully established a T2DM model in minipigs. The HFD did not induce apparent atherosclerotic lesions, but these were seen with the HCFD. Hyperglycemia accelerated atherosclerosis in the minipigs.
Collapse
Affiliation(s)
- Yuqiong Zhao
- Laboratory Animal Center, Chinese PLA General Hospital, Beijing, China
| | - Miaomiao Niu
- Laboratory Animal Center, Chinese PLA General Hospital, Beijing, China
| | - Yunxiao Jia
- Laboratory Animal Center, Chinese PLA General Hospital, Beijing, China
| | - Jifang Yuan
- Laboratory Animal Center, Chinese PLA General Hospital, Beijing, China
| | - Lei Xiang
- Laboratory Animal Center, Chinese PLA General Hospital, Beijing, China
| | - Xin Dai
- Laboratory Animal Center, Chinese PLA General Hospital, Beijing, China
| | - Guisheng Wang
- Radiology Department of No. 3 Clinical Center, Chinese PLA General Hospital, Beijing, China
| | - Hua Chen
- Laboratory Animal Center, Chinese PLA General Hospital, Beijing, China
| |
Collapse
|
3
|
Xu Y, Curtasu MV, Bach Knudsen KE, Hedemann MS, Theil PK, Lærke HN. Dietary fibre and protein do not synergistically influence insulin, metabolic or inflammatory biomarkers in young obese Göttingen minipigs. Br J Nutr 2020; 125:1-13. [PMID: 32778179 DOI: 10.1017/s0007114520003141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The effects of dietary fibre (DF) and protein on insulin response, lipidaemia and inflammatory biomarkers were studied in a model experiment with juvenile obese Göttingen minipigs. After 20 weeks feeding on a high-fat fructose-rich low-DF diet, forty-three 30-week-old minipigs (31·3 (sem 4·0) kg body weight) were allocated to low- or high-DF and -protein diets for 8 weeks in a 2 × 2 factorial design. High DF contents decreased (P = 0·006) while high protein increased (P < 0·001) the daily gain. High protein contents increased fasting plasma concentrations of glucose (P = 0·008), NEFA (P = 0·015), ghrelin (P = 0·008) and non-fasting LDL:HDL ratios (P = 0·015). High DF increased ghrelin (P = 0·036) and C-peptide levels (P = 0·011) in the non-fasting state. High protein increased the gene expression of fructose-bisphosphatase 1 in liver tissue (P = 0·043), whereas DF decreased fatty acid synthase expression in adipose tissue (P = 0·035). Interactions between DF and protein level were observed in the expression of leptin receptor in adipose tissue (P = 0·031) and of PPARγ in muscle (P = 0·018) and adipose tissue (P = 0·004). In conclusion, high DF intake reduced weight gain and had potential benefit on β-cell secretory function, but without effect on the lipid profile in this young obese model. High dietary protein by supplementing with whey protein did not improve insulin sensitivity or lipidaemia, and combining high DF with high protein did not alleviate the risk of metabolic abnormalities.
Collapse
Affiliation(s)
- Yetong Xu
- Department of Animal Science, Aarhus University, DK-8830Tjele, Denmark
| | | | | | | | | | | |
Collapse
|
4
|
Abstract
Swine disease models are essential for mimicry of human metabolic and vascular pathophysiology, thereby enabling high-fidelity translation to human medicine. The worldwide epidemic of obesity, metabolic disease, and diabetes has prompted the focus on these diseases in this review. We highlight the remarkable similarity between Ossabaw miniature swine and humans with metabolic syndrome and atherosclerosis. Although the evidence is strongest for swine models of coronary artery disease, findings are generally applicable to any vascular bed. We discuss the major strengths and weaknesses of swine models. The development of vascular imaging is an example of optimal vascular engineering in swine. Although challenges regarding infrastructure and training of engineers in the use of swine models exist, opportunities are ripe for gene editing, studies of molecular mechanisms, and use of swine in coronary artery imaging and testing of devices that can move quickly to human clinical studies.
Collapse
Affiliation(s)
- Michael Sturek
- Department of Anatomy, Cell Biology, and Physiology, Indiana University School of Medicine, Indianapolis, Indiana 46202-5120, USA; .,Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 46907, USA
| | - Mouhamad Alloosh
- Department of Anatomy, Cell Biology, and Physiology, Indiana University School of Medicine, Indianapolis, Indiana 46202-5120, USA;
| | - Frank W Sellke
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital and Warren Alpert Medical School of Brown University, Providence, Rhode Island 02903, USA
| |
Collapse
|
5
|
Çeribaşı S, Türk G, Özçelik M, Doğan G, Çeribaşı AO, Mutlu Sİ, Erişir Z, Güvenç M, Güngören G, Acısu TC, Akarsu SA, Kaya ŞÖ, Sönmez M, Yüce A, Çiftçi M, Çambay Z, Bağcı E, Azman MA, Şimşek ÜG. Negative effect of feeding with high energy diets on testes and metabolic blood parameters of male Japanese quails, and positive role of milk thistle seed. Theriogenology 2020; 144:74-81. [PMID: 31927417 DOI: 10.1016/j.theriogenology.2019.12.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 12/26/2019] [Accepted: 12/26/2019] [Indexed: 11/19/2022]
Abstract
In this study, it was aimed to investigate the changes in testicular tissue and cell count, testicular oxidative stress and some metabolic blood parameters of male broiler Japanese quails fed with high energy diet and milk thistle (Silybum marianum) seed. One hundred-twenty male 15-day-old Japanese quail chicks were divided into 4 equal groups with 30 each. The applications in each group were repeated 3 times with 10 animals each. Control group was fed with basal diet. Milk thistle seed group was fed with diet including 1% milk thistle seed. High energy diet group was fed with high energy diet including 10% corn syrup. High energy diet + milk thistle seed group was fed with high energy diet including 10% corn syrup along with 1% milk thistle seed. The feeding period in all groups was 35 days. When the quails reached 50 days old, a total of 48, 12 from each group (4 from each replication) were euthanized and blood samples and testes were collected. Compared with the control group, significant increases in body weight, serum cholesterol and glucose level, aspartate aminotransferase activity and testicular malondialdehyde level; however, significant decreases in serum testosterone level, testicular glutathione peroxidase activity, counts of round and elongated spermatid and sperm as well as histopathologically, significant decreases in seminiferous tubular diameter and seminiferous epithelium thickness, and marked disorganization in germinal cells were determined in quails fed with high energy diet. It was observed that almost all of the disturbances in testicular tissue, cell number, oxidant-antioxidant balance and metabolic blood parameters caused by feeding with high energy diet were significantly prevented by supplementation of milk thistle seed to the diet with high energy. On the other hand, alone milk thistle seed and high energy diet + milk thistle seed administrations decreased body weight in comparison to control and high energy diet groups. As a result, feeding with high energy diet causes disturbances in testes of male quails by affecting liver metabolic functions and testicular oxidant-antioxidant balance, but milk thistle seed addition to diet plays a protective role.
Collapse
Affiliation(s)
- S Çeribaşı
- Department of Pathology, Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey
| | - G Türk
- Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey.
| | - M Özçelik
- Department of Medical Services and Technics, High School of Medical Services, Fırat University, Elazığ, Turkey
| | - G Doğan
- Department of Biology, Faculty of Science, Fırat University, Elazığ, Turkey
| | - A O Çeribaşı
- Department of Pathology, Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey
| | - S İflazoğlu Mutlu
- Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey
| | - Z Erişir
- Department of Animal Science, Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey
| | - M Güvenç
- Department of Physiology, Faculty of Veterinary Medicine, Mustafa Kemal University, Hatay, Turkey
| | - G Güngören
- Department of Animal Science, Faculty of Veterinary Medicine, Harran University, Şanlıurfa, Turkey
| | - T C Acısu
- Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey
| | - S A Akarsu
- Elbistan High School, İstiklal University, Kahramanmaraş, Turkey
| | - Ş Özer Kaya
- Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey
| | - M Sönmez
- Department of Reproduction and Artificial Insemination, Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey
| | - A Yüce
- Department of Physiology, Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey
| | - M Çiftçi
- Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey
| | - Z Çambay
- Department of Medical Services and Technics, High School of Medical Services, Fırat University, Elazığ, Turkey
| | - E Bağcı
- Department of Biology, Faculty of Science, Fırat University, Elazığ, Turkey
| | - M A Azman
- Department of Animal Nutrition and Nutritional Diseases, Faculty of Veterinary Medicine, Balıkesir University, Balıkesir, Turkey
| | - Ü G Şimşek
- Department of Animal Science, Faculty of Veterinary Medicine, Fırat University, Elazığ, Turkey
| |
Collapse
|
6
|
Reimer C, Rubin CJ, Sharifi AR, Ha NT, Weigend S, Waldmann KH, Distl O, Pant SD, Fredholm M, Schlather M, Simianer H. Analysis of porcine body size variation using re-sequencing data of miniature and large pigs. BMC Genomics 2018; 19:687. [PMID: 30231878 PMCID: PMC6146782 DOI: 10.1186/s12864-018-5009-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 08/14/2018] [Indexed: 12/30/2022] Open
Abstract
Background Domestication has led to substantial phenotypic and genetic variation in domestic animals. In pigs, the size of so called minipigs differs by one order of magnitude compared to breeds of large body size. We used biallelic SNPs identified from re-sequencing data to compare various publicly available wild and domestic populations against two minipig breeds to gain better understanding of the genetic background of the extensive body size variation. We combined two complementary measures, expected heterozygosity and the composite likelihood ratio test implemented in “SweepFinder”, to identify signatures of selection in Minipigs. We intersected these sweep regions with a measure of differentiation, namely FST, to remove regions of low variation across pigs. An extraordinary large sweep between 52 and 61 Mb on chromosome X was separately analyzed based on SNP-array data of F2 individuals from a cross of Goettingen Minipigs and large pigs. Results Selective sweep analysis identified putative sweep regions for growth and subsequent gene annotation provided a comprehensive set of putative candidate genes. A long swept haplotype on chromosome X, descending from the Goettingen Minipig founders was associated with a reduction of adult body length by 3% in F2 cross-breds. Conclusion The resulting set of genes in putative sweep regions implies that the genetic background of body size variation in pigs is polygenic rather than mono- or oligogenic. Identified genes suggest alterations in metabolic functions and a possible insulin resistance to contribute to miniaturization. A size QTL located within the sweep on chromosome X, with an estimated effect of 3% on body length, is comparable to the largest known in pigs or other species. The androgen receptor AR, previously known to influence pig performance and carcass traits, is the most obvious potential candidate gene within this region. Electronic supplementary material The online version of this article (10.1186/s12864-018-5009-y) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- C Reimer
- Animal Breeding and Genetics Group, Department of Animal Sciences, University of Goettingen, Albrecht-Thaer-Weg 3, 37075, Goettingen, Germany. .,Center for Integrated Breeding Research, University of Goettingen, Albrecht-Thaer-Weg 3, 37075, Goettingen, Germany.
| | - C-J Rubin
- Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala Biomedicinska centrum BMC, Husargatan 3, 75237, Uppsala, Sweden
| | - A R Sharifi
- Animal Breeding and Genetics Group, Department of Animal Sciences, University of Goettingen, Albrecht-Thaer-Weg 3, 37075, Goettingen, Germany.,Center for Integrated Breeding Research, University of Goettingen, Albrecht-Thaer-Weg 3, 37075, Goettingen, Germany
| | - N-T Ha
- Animal Breeding and Genetics Group, Department of Animal Sciences, University of Goettingen, Albrecht-Thaer-Weg 3, 37075, Goettingen, Germany.,Center for Integrated Breeding Research, University of Goettingen, Albrecht-Thaer-Weg 3, 37075, Goettingen, Germany
| | - S Weigend
- Institute of Farm Animal Genetics of the Friedrich-Loeffler-Institut, Höltystraße 10, 31535, Neustadt-Mariensee, Germany.,Center for Integrated Breeding Research, University of Goettingen, Albrecht-Thaer-Weg 3, 37075, Goettingen, Germany
| | - K-H Waldmann
- Clinic for Swine, Small Ruminants, Forensic Medicine and Ambulatory Service, University of Veterinary Medicine - Foundation, Bischofsholer Damm 15, 30173, Hannover, Germany
| | - O Distl
- Institute of Animal Breeding and Genetics, University of Veterinary Medicine - Foundation, Bünteweg 17p, 30559, Hannover, Germany
| | - S D Pant
- Graham Centre for Agricultural Innovation, School of Animal & Veterinary Sciences, Charles Sturt University, Locked Bag 588, Boorooma St., Wagga Wagga, NSW, Australia
| | - M Fredholm
- Department of Veterinary- and Animal Sciences, University of Copenhagen, Grønnegårdsvej 3, 1870, Frederiksberg C, Denmark
| | - M Schlather
- School of Business Informatics and Mathematics, University of Mannheim, A5 6, 68131, Mannheim, Germany.,Center for Integrated Breeding Research, University of Goettingen, Albrecht-Thaer-Weg 3, 37075, Goettingen, Germany
| | - H Simianer
- Animal Breeding and Genetics Group, Department of Animal Sciences, University of Goettingen, Albrecht-Thaer-Weg 3, 37075, Goettingen, Germany.,Center for Integrated Breeding Research, University of Goettingen, Albrecht-Thaer-Weg 3, 37075, Goettingen, Germany
| |
Collapse
|
7
|
Myrie SB, McKnight LL, King JC, McGuire JJ, Van Vliet BN, Cheema SK, Bertolo RF. Intrauterine growth-restricted Yucatan miniature pigs experience early catch-up growth, leading to greater adiposity and impaired lipid metabolism as young adults. Appl Physiol Nutr Metab 2017; 42:1322-1329. [PMID: 28813611 DOI: 10.1139/apnm-2017-0311] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2023]
Abstract
Early nutrition has critical influences on cardiovascular disease risk in adulthood. The study objectives were to evaluate the impact of low birth weight on fasting and postprandial lipid metabolism and endothelium function in Yucatan miniature pigs. Intrauterine growth-restricted (IUGR) piglets (n = 6; 3 days old, 0.73 ± 0.04 kg) were paired with normal-weight (NW) same-sex littermates (n = 6; 1.11 ± 0.05 kg) and fed milk replacer ad libitum for 4 weeks. Thereafter, all pigs were fed a standard diet ad libitum for 5 h/day with growth, intakes, and blood samples collected for 8 months. At 9 months old, pigs were surgically fitted with venous catheters and an oral fat tolerance test was performed. At 10 months old, pigs were killed and endothelium-dependent and -independent vasodilations of isolated coronary arteries were measured using wire-myographs. IUGR pigs demonstrated catch-up growth (P < 0.05) in body weight and abdominal circumference prior to sexual maturity (<7 months old) and had more (P < 0.05) subcutaneous fat at 10 months old compared with NW pigs. IUGR pigs had consistently higher fasting plasma triglyceride concentrations from 5 to 10 months old and higher liver triglyceride and total cholesterol concentrations at 10 months old (P < 0.05). The fat tolerance test revealed delayed postprandial triglyceride clearance in IUGR pigs, but no differences in plaque formation or vascular reactivity. To conclude, IUGR and early postnatal catch-up growth are associated with increased overall body fat deposition and altered triglyceride metabolism in adult Yucatan miniature swine.
Collapse
Affiliation(s)
- Semone B Myrie
- a Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada
| | - Leslie L McKnight
- a Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada
| | - J Christopher King
- b Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL A1C 5S7, Canada
| | - John J McGuire
- b Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL A1C 5S7, Canada
| | - Bruce N Van Vliet
- b Division of BioMedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL A1C 5S7, Canada
| | - Sukhinder K Cheema
- a Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada
| | - Robert F Bertolo
- a Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada
| |
Collapse
|
8
|
Hsu MC, Wang ME, Jiang YF, Liu HC, Chen YC, Chiu CH. Long-term feeding of high-fat plus high-fructose diet induces isolated impaired glucose tolerance and skeletal muscle insulin resistance in miniature pigs. Diabetol Metab Syndr 2017; 9:81. [PMID: 29046729 PMCID: PMC5640912 DOI: 10.1186/s13098-017-0281-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 10/06/2017] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND During the prediabetic development, the changes in β-cell function and tissue-specific insulin resistance have been described. However, there are conflicting views in insulin secretory capacity between early clinical observation and recent proposed mathematical model. On the basis of digestive and metabolic similarities with humans, swine have great potential as an animal model to investigate the progressive mechanisms of prediabetes. The aim of this study was to investigate the insulin secretory response and tissue-specific insulin resistance in a dietary-induced prediabetic porcine model. METHODS Adult male Taiwan Lee-Sung miniature pigs were randomized into two groups: (1) low-fat diet and (2) high-fat plus high-fructose diet (HFHF; 20.9% crude fat and 17.8% fructose). During the 12-month dietary intervention, body weights and blood glucose levels were measured monthly. Intravenous glucose tolerance test was used for measuring glucose tolerance and insulin secretory capacity. At the end of the experiment, liver and soleus muscle specimens were collected for ex vivo insulin sensitivity testing. RESULTS The results showed that the HFHF group had obesity, hyperinsulinemia, and dyslipidemia, but normal fasting glucose levels. The HFHF pigs exhibited enhanced first- and second-phase insulin secretion and high 2-h postload glucose levels in intravenous glucose tolerance test. Furthermore, the skeletal muscle specimens from the HFHF group were desensitized to insulin stimulation as shown by the lack of AKT Ser473 phosphorylation; however, the liver specimens remained a normal response. CONCLUSIONS In conclusion, the HFHF diet-fed pigs developed isolated impaired glucose tolerance corresponding to prediabetes with an intense insulin secretory response and skeletal muscle insulin resistance.
Collapse
Affiliation(s)
- Meng-Chieh Hsu
- Laboratory of Animal Physiology, Department of Animal Science and Technology, National Taiwan University, No. 50, Ln. 155, Sec. 3, Keelung Rd., Da’an Dist., Taipei, 106 Taiwan, Republic of China
| | - Mu-En Wang
- Laboratory of Animal Physiology, Department of Animal Science and Technology, National Taiwan University, No. 50, Ln. 155, Sec. 3, Keelung Rd., Da’an Dist., Taipei, 106 Taiwan, Republic of China
| | - Yi-Fan Jiang
- Laboratory of Animal Physiology, Department of Animal Science and Technology, National Taiwan University, No. 50, Ln. 155, Sec. 3, Keelung Rd., Da’an Dist., Taipei, 106 Taiwan, Republic of China
- Graduate Institute of Molecular and Comparative Pathobiology, School of Veterinary Medicine, National Taiwan University, No. 1, Sec. 4, Rooservelt Rd., Da’an Dist., Taipei, 106 Taiwan, Republic of China
| | - Hung-Chang Liu
- Department of Thoracic Surgery, Mackay Memorial Hospital, No. 92, Sec. 2, Chung-Shan North Rd., Zhongshan Dist., Taipei, 104 Taiwan, Republic of China
| | - Yi-Chen Chen
- Laboratory of Animal Physiology, Department of Animal Science and Technology, National Taiwan University, No. 50, Ln. 155, Sec. 3, Keelung Rd., Da’an Dist., Taipei, 106 Taiwan, Republic of China
| | - Chih-Hsien Chiu
- Laboratory of Animal Physiology, Department of Animal Science and Technology, National Taiwan University, No. 50, Ln. 155, Sec. 3, Keelung Rd., Da’an Dist., Taipei, 106 Taiwan, Republic of China
| |
Collapse
|
9
|
Hernández Hurtado L, Sánchez-Margallo FM, De la Cruz Vigo JL, Maestre Antequera J, Matos Azevedo AM, Casado JG, Díaz-Güemes Martín-Portugués I. Changes on Adipose Tissue Distribution After Laparoscopic Roux-en-Y Gastric Bypass in Obese Göttingen Minipig. Effects on Glucose Metabolism. Obes Surg 2016; 26:3001-3006. [PMID: 27185175 DOI: 10.1007/s11695-016-2223-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND The objective of the study was to assess Roux-en-Y independent-to-weight metabolic effects on an obese Gottingen minipig. METHODS Eleven castrated Göttingen minipigs were enrolled. Minipigs became obese after a 9-month period of experimental diet. The animals were then subjected to a laparoscopic Roux-en-Y gastric bypass (period P1) followed by 4 months of follow-up (period P2). During this last period, they were fed to maintain similar body weight to that observed at the day of surgery. Registered parameters during each period included biometric variables; abdominal adipose tissue (AT) distribution; lipid profile; HOMA-IR; and fasting plasma leptin, adiponectin, glucose, insulin and fructosamine. RESULTS Two pigs were unable to complete the study due to postoperative complications. Four months after surgery, the body weight (kg) was maintained (P1 51.90 ± 5.78 vs P2 51.47 ± 5.68). On the contrary, intraperitoneal AT (p < 0.0001), glucose (mmol/L) (P1: 5.53 ± 0.37 vs 4.66 ± 0.72, p = 0.019), fructosamine (μmol/L) (p = 0.0001) and insulin (pmol/L) (P1: 36.66 ± 13.94 vs P2: 21.42 ± 12.62, p = 0.001) significantly decreased after surgery. Lipid profile showed a significant increase after high-fat feeding period and a slight reduction at P2, which continued increasing. At the end of the study, leptin plasma levels (ng/mL) showed a significant reduction compared to basal value (p = 0.001). CONCLUSIONS The improvement in glucose metabolism seems to occur by means of the redistribution of body fat. In order to fully confirm this hypothesis, more studies including the evaluation of incretins and inflammatory molecules, as well as a glycaemia control study against glucose load, are needed.
Collapse
Affiliation(s)
| | | | | | | | | | - Javier G Casado
- Minimally Invasive Surgery Centre Jesús Usón, Cáceres, Spain
| | | |
Collapse
|
10
|
Yang SL, Xia JH, Zhang YY, Fan JG, Wang H, Yuan J, Zhao ZZ, Pan Q, Mu YL, Xin LL, Chen YX, Li K. Hyperinsulinemia shifted energy supply from glucose to ketone bodies in early nonalcoholic steatohepatitis from high-fat high-sucrose diet induced Bama minipigs. Sci Rep 2015; 5:13980. [PMID: 26358367 PMCID: PMC4566077 DOI: 10.1038/srep13980] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 08/12/2015] [Indexed: 02/06/2023] Open
Abstract
The minipig can serve as a good pharmacological model for human subjects. However, the long-term pathogenesis of high-calorie diet-induced metabolic syndromes, including NASH, has not been well described in minipigs. We examined the development of metabolic syndromes in Bama minipigs that were fed a high-fat, high-sucrose diet (HFHSD) for 23 months, by using histology and serum biochemistry and by profiling the gene expression patterns in the livers of HFHSD pigs compared to controls. The pathology findings revealed microvesicular steatosis, iron overload, arachidonic acid synthesis, lipid peroxidation, reduced antioxidant capacity, increased cellular damage, and inflammation in the liver. RNA-seq analysis revealed that 164 genes were differentially expressed between the livers of the HFHSD and control groups. The pathogenesis of early-stage NASH was characterized by hyperinsulinemia and by de novo synthesis of fatty acids and nascent triglycerides, which were deposited as lipid droplets in hepatocytes. Hyperinsulinemia shifted the energy supply from glucose to ketone bodies, and the high ketone body concentration induced the overexpression of cytochrome P450 2E1 (CYP2E1). The iron overload, CYP2E1 and alcohol dehydrogenase 4 overexpression promoted reactive oxygen species (ROS) production, which resulted in arachidonic and linoleic acid peroxidation and, in turn, led to malondialdehyde production and a cellular response to ROS-mediated DNA damage.
Collapse
Affiliation(s)
- Shu-lin Yang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, No.2 Yuanmingyuan West Road, Beijing, 100193, P.R. China
| | - Ji-han Xia
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, No.2 Yuanmingyuan West Road, Beijing, 100193, P.R. China
| | - Yuan-yuan Zhang
- College of Veterinary Medicine, China Agricultural University, No.2 Yuanmingyuan West Road, Beijing, 100193, P.R. China
| | - Jian-gao Fan
- Department of Gastroenterology, Shanghai Key Laboratory of Children's Digestion and Nutrition, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200092, P.R. China
| | - Hua Wang
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei, 230032, Anhui, P.R. China
| | - Jing Yuan
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, No.2 Yuanmingyuan West Road, Beijing, 100193, P.R. China.,College of Animal Science, Yangtze University, Jinzhou, 434023, Hubei, P.R. China
| | - Zhan-zhao Zhao
- College of Veterinary Medicine, China Agricultural University, No.2 Yuanmingyuan West Road, Beijing, 100193, P.R. China
| | - Qin Pan
- Department of Gastroenterology, Shanghai Key Laboratory of Children's Digestion and Nutrition, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200092, P.R. China
| | - Yu-lian Mu
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, No.2 Yuanmingyuan West Road, Beijing, 100193, P.R. China
| | - Lei-lei Xin
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, No.2 Yuanmingyuan West Road, Beijing, 100193, P.R. China
| | - Yao-xing Chen
- College of Veterinary Medicine, China Agricultural University, No.2 Yuanmingyuan West Road, Beijing, 100193, P.R. China
| | - Kui Li
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, No.2 Yuanmingyuan West Road, Beijing, 100193, P.R. China
| |
Collapse
|
11
|
Blat S, Vincent S, Lefeuvre L, Lemoine-Morel S, Malbert CH, Pichon L, Mikogami T, Gratas-Delamarche A. Dietary α-lactalbumin supplementation alleviates normocaloric western diet-induced glucose intolerance in Göttingen minipigs. Obesity (Silver Spring) 2015; 23:415-21. [PMID: 25594308 DOI: 10.1002/oby.20990] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 10/28/2014] [Indexed: 01/26/2023]
Abstract
OBJECTIVE The pandemic of obesity in Western countries is mainly due to the high-fat, high-energy diet prevailing there. Obesity-associated metabolic disorders are the consequence of fat mass increase leading to altered adipokine secretion, hyperlipemia, oxidant stress, low-grade inflammation, and eventually glucose intolerance. Yet not all people consuming a Western diet become obese, and the question is raised whether these people are also at risk of developing metabolic disorders. METHODS Glucose tolerance, lipid profile, and oxidant and inflammation status were investigated longitudinally in lean Göttingen minipigs receiving for 16 weeks either a normal diet (ND), a Western diet (WD), or a Western diet supplemented with a whey protein isolate (WPI) rich in α-lactalbumin known to improve glucose tolerance. ND and WD were supplied isoenergetically. RESULTS Lean minipigs fed WD displayed glucose intolerance and altered lipid profile after 6 weeks of diet but no inflammation or oxidative stress. Supplementation with WPI alleviated glucose intolerance by improving insulin secretion, but not lipid profile. CONCLUSIONS Western diet consumption is deleterious for glucose tolerance even in the absence of fat mass accretion, and dyslipemia is a major determinant for this metabolic dysfunction. Stimulating insulin secretion with a WPI is an effective strategy to improve glucose tolerance.
Collapse
Affiliation(s)
- Sophie Blat
- INRA, UR1341, ADNC, F-35590, Saint-Gilles, France
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Yongming P, Zhaowei C, Yichao M, Keyan Z, Liang C, Fangming C, Xiaoping X, Quanxin M, Minli C. Involvement of peroxisome proliferator-activated receptors in cardiac and vascular remodeling in a novel minipig model of insulin resistance and atherosclerosis induced by consumption of a high-fat/cholesterol diet. Cardiovasc Diabetol 2015; 14:6. [PMID: 25592139 PMCID: PMC4300051 DOI: 10.1186/s12933-014-0165-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 12/27/2014] [Indexed: 11/10/2022] Open
Abstract
Background A long-term high-fat/cholesterol (HFC) diet leads to insulin resistance (IR), which is associated with inflammation, atherosclerosis (AS), cardiac sympathovagal imbalance, and cardiac dysfunction. Peroxisome proliferator-activated receptors (PPARs) and nuclear factor ĸB (NF-κB) are involved in the development of IR-AS. Thus, we elucidated the pathological molecular mechanism of IR-AS by feeding an HFC diet to Tibetan minipigs to induce IR and AS. Methods Male Tibetan minipigs were fed either a normal diet or an HFC diet for 24 weeks. Thereafter, the minipigs were tested for physiological and biochemical blood indices, blood pressure, cardiac function, glucose tolerance, heart rate variability (HRV), and PPAR-associated gene and protein expression levels. Results HFC-fed minipigs exhibited IR through increased body weight, fasting blood glucose levels, plasma cholesterol and its composition, and insulin and free fatty acid (FFA) levels; decreased insulin sensitivity; impaired glucose tolerance; and hypertension. Increased C-reactive protein (CRP) levels, cardiac dysfunction, depressed HRV, and the up-regulation of PPAR expression in the abdominal aorta concomitant with down-regulation in the heart tissue were observed in HFC-fed minipigs. Furthermore, the levels of NF-κBp65, IL-1β, TNF-α, MCP-1, VCAM-1, ICAM-1, MMP-9, and CRP proteins were also significantly increased. Conclusions These data suggest that HFC-fed Tibetan minipigs develop IR and AS and that PPARs are involved in cardiovascular remodeling and impaired function.
Collapse
Affiliation(s)
- Pan Yongming
- Experimental Animal Research Center, Zhejiang Chinese Medical University, No. 548 Binwen Road, Binjiang District, Hangzhou, 310053, China.
| | - Cai Zhaowei
- Experimental Animal Research Center, Zhejiang Chinese Medical University, No. 548 Binwen Road, Binjiang District, Hangzhou, 310053, China.
| | - Ma Yichao
- Experimental Animal Research Center, Zhejiang Chinese Medical University, No. 548 Binwen Road, Binjiang District, Hangzhou, 310053, China.
| | - Zhu Keyan
- Experimental Animal Research Center, Zhejiang Chinese Medical University, No. 548 Binwen Road, Binjiang District, Hangzhou, 310053, China.
| | - Chen Liang
- Experimental Animal Research Center, Zhejiang Chinese Medical University, No. 548 Binwen Road, Binjiang District, Hangzhou, 310053, China.
| | - Chen Fangming
- Experimental Animal Research Center, Zhejiang Chinese Medical University, No. 548 Binwen Road, Binjiang District, Hangzhou, 310053, China.
| | - Xu Xiaoping
- Experimental Animal Research Center, Zhejiang Chinese Medical University, No. 548 Binwen Road, Binjiang District, Hangzhou, 310053, China.
| | - Ma Quanxin
- Experimental Animal Research Center, Zhejiang Chinese Medical University, No. 548 Binwen Road, Binjiang District, Hangzhou, 310053, China.
| | - Chen Minli
- Experimental Animal Research Center, Zhejiang Chinese Medical University, No. 548 Binwen Road, Binjiang District, Hangzhou, 310053, China.
| |
Collapse
|
13
|
Rødgaard T, Skovgaard K, Moesgaard SG, Cirera S, Christoffersen BØ, Heegaard PMH. Extensive changes in innate immune gene expression in obese Göttingen minipigs do not lead to changes in concentrations of circulating cytokines and acute phase proteins. Anim Genet 2013; 45:67-73. [PMID: 24106888 DOI: 10.1111/age.12090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/19/2013] [Indexed: 12/22/2022]
Abstract
The usefulness of Göttingen minipigs as models for obesity and obesity-related pathologies is well established. The low-grade inflammation associated with obesity involves a range of innate immune factors; however, to our knowledge, the impact of obesity on innate immune factor expression has not been studied in Göttingen minipigs. Therefore, we studied the expression of innate immune genes in liver and adipose tissues as well as serum concentrations of cytokines and acute phase proteins in obese vs. lean Göttingen minipigs. In the liver, of 35 investigated genes, the expression of nine was significantly different in obese pigs (three up-regulated, six down-regulated). Of 33 genes in adipose tissues, obesity was associated with changed expression of 12 genes in the visceral adipose tissue (VAT) (three up-regulated), 11 in the abdominal retroperitoneal adipose tissue (RPAT) (seven of these up-regulated) and eight in the subcutaneous adipose tissue (SAT) from the neck (five of which were up-regulated). Obesity-associated expression changes were observed for three genes in all adipose tissues, namely chemokine (C-C motif) ligand 3-like 1 (up-regulated), CD200 molecule (down-regulated) and interleukin 1 receptor antagonist (up-regulated) with interleukin 1 receptor antagonist being the most highly regulated gene in both VAT and RPAT. Looking at patterns of expression across the three types of adipose tissues, obesity was associated with an increased number of acute phase proteins differentially expressed between adipose tissues and a decreased tissue-specific expression of cytokines and chemokines. In contrast to obese humans, no changes in serum concentrations of haptoglobin, C-reactive protein, serum amyloid A, tumor necrosis factor-α and interleukin 6 were found in obese Göttingen minipigs.
Collapse
Affiliation(s)
- T Rødgaard
- National Veterinary Institute, Technical University of Denmark, Frederiksberg C, 1870, Denmark
| | | | | | | | | | | |
Collapse
|
14
|
Fisher KD, Scheffler TL, Kasten SC, Reinholt BM, van Eyk GR, Escobar J, Scheffler JM, Gerrard DE. Energy dense, protein restricted diet increases adiposity and perturbs metabolism in young, genetically lean pigs. PLoS One 2013; 8:e72320. [PMID: 23991090 PMCID: PMC3753342 DOI: 10.1371/journal.pone.0072320] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Accepted: 07/11/2013] [Indexed: 01/15/2023] Open
Abstract
Animal models of obesity and metabolic dysregulation during growth (or childhood) are lacking. Our objective was to increase adiposity and induce metabolic syndrome in young, genetically lean pigs. Pre-pubertal female pigs, age 35 d, were fed a high-energy diet (HED; n = 12), containing 15% tallow, 35% refined sugars and 9.1–12.9% crude protein, or a control corn-based diet (n = 11) with 12.2–19.2% crude protein for 16 wk. Initially, HED pigs self-regulated energy intake similar to controls, but by wk 5, consumed more (P<0.001) energy per kg body weight. At wk 15, pigs were subjected to an oral glucose tolerance test (OGTT); blood glucose increased (P<0.05) in control pigs and returned to baseline levels within 60 min. HED pigs were hyperglycemic at time 0, and blood glucose did not return to baseline (P = 0.01), even 4 h post-challenge. During OGTT, glucose area under the curve (AUC) was higher and insulin AUC was lower in HED pigs compared to controls (P = 0.001). Chronic HED intake increased (P<0.05) subcutaneous, intramuscular, and perirenal fat deposition, and induced hyperglycemia, hypoinsulinemia, and low-density lipoprotein hypercholesterolemia. A subset of HED pigs (n = 7) was transitioned back to a control diet for an additional six weeks. These pigs were subjected to an additional OGTT at 22 wk. Glucose AUC and insulin AUC did not improve, supporting that dietary intervention was not sufficient to recover glucose tolerance or insulin production. These data suggest a HED may be used to increase adiposity and disrupt glucose homeostasis in young, growing pigs.
Collapse
Affiliation(s)
- Kimberly D. Fisher
- Department of Animal and Poultry Sciences, Virginia Tech University, Blacksburg, Virginia, United States of America
| | - Tracy L. Scheffler
- Department of Animal and Poultry Sciences, Virginia Tech University, Blacksburg, Virginia, United States of America
| | - Steven C. Kasten
- Department of Animal and Poultry Sciences, Virginia Tech University, Blacksburg, Virginia, United States of America
| | - Brad M. Reinholt
- Department of Animal and Poultry Sciences, Virginia Tech University, Blacksburg, Virginia, United States of America
| | - Gregory R. van Eyk
- Department of Animal and Poultry Sciences, Virginia Tech University, Blacksburg, Virginia, United States of America
| | - Jeffery Escobar
- Department of Animal and Poultry Sciences, Virginia Tech University, Blacksburg, Virginia, United States of America
| | - Jason M. Scheffler
- Department of Animal and Poultry Sciences, Virginia Tech University, Blacksburg, Virginia, United States of America
- * E-mail:
| | - David E. Gerrard
- Department of Animal and Poultry Sciences, Virginia Tech University, Blacksburg, Virginia, United States of America
| |
Collapse
|
15
|
Mardas N, Dereka X, Donos N, Dard M. Experimental Model for Bone Regeneration in Oral and Cranio-Maxillo-Facial Surgery. J INVEST SURG 2013; 27:32-49. [DOI: 10.3109/08941939.2013.817628] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
16
|
Lomax MA, Karamanlidis G, Laws J, Cremers SG, Weinberg PD, Clarke L. Pigs fed saturated fat/cholesterol have a blunted hypothalamic-pituitary-adrenal function, are insulin resistant and have decreased expression of IRS-1, PGC1α and PPARα. J Nutr Biochem 2013; 24:656-63. [DOI: 10.1016/j.jnutbio.2012.03.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 02/22/2012] [Accepted: 03/15/2012] [Indexed: 10/28/2022]
|
17
|
Pedersen R, Ingerslev HC, Sturek M, Alloosh M, Cirera S, Christoffersen BØ, Moesgaard SG, Larsen N, Boye M. Characterisation of gut microbiota in Ossabaw and Göttingen minipigs as models of obesity and metabolic syndrome. PLoS One 2013; 8:e56612. [PMID: 23437186 PMCID: PMC3577853 DOI: 10.1371/journal.pone.0056612] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Accepted: 01/11/2013] [Indexed: 01/10/2023] Open
Abstract
Background Recent evidence suggests that the gut microbiota is an important contributing factor to obesity and obesity related metabolic disorders, known as the metabolic syndrome. The aim of this study was to characterise the intestinal microbiota in two pig models of obesity namely Göttingen minipigs and the Ossabaw minipigs. Methods and Findings The cecal, ileal and colonic microbiota from lean and obese Osabaw and Göttingen minipigs were investigated by Illumina-based sequencing and by high throughput qPCR, targeting the 16S rRNA gene in different phylogenetic groups of bacteria. The weight gain through the study was significant in obese Göttingen and Ossabaw minipigs. The lean Göttingen minipigs’ cecal microbiota contained significantly higher abundance of Firmicutes (P<0.006), Akkermensia (P<0.01) and Methanovibribacter (P<0.01) than obese Göttingen minipigs. The obese Göttingen cecum had higher abundances of the phyla Spirochaetes (P<0.03), Tenericutes (P<0.004), Verrucomicrobia (P<0.005) and the genus Bacteroides (P<0.001) compared to lean minipigs. The relative proportion of Clostridium cluster XIV was 7.6-fold higher in cecal microbiota of obese Göttingen minipigs as compared to lean. Obese Ossabaw minipigs had a higher abundance of Firmicutes in terminal ileum and lower abundance of Bacteroidetes in colon than lean Ossabaw minipigs (P<0.01). Obese Ossabaws had significantly lower abundances of the genera Prevotella and Lactobacillus and higher abundance of Clostridium in their colon than the lean Ossabaws. Overall, the Göttingen and Ossabaw minipigs displayed different microbial communities in response to diet-induced obesity in the different sections of their intestine. Conclusion Obesity-related changes in the composition of the gut microbiota were found in lean versus obese Göttingen and Ossabaw minipigs. In both pig models diet seems to be the defining factor that shapes the gut microbiota as observed by changes in different bacteria divisions between lean and obese minipigs.
Collapse
Affiliation(s)
- Rebecca Pedersen
- Department of Bacteriology Pathology and Parasitology, National Veterinary Institute, Technical University of Denmark, Frederiksberg C, Denmark
| | - Hans-Christian Ingerslev
- Department of Bacteriology Pathology and Parasitology, National Veterinary Institute, Technical University of Denmark, Frederiksberg C, Denmark
| | - Michael Sturek
- Department of Cellular & Integrative Physiology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Mouhamad Alloosh
- Department of Cellular & Integrative Physiology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Susanna Cirera
- Department of Veterinary Clinical and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | | | | | | | - Mette Boye
- Department of Bacteriology Pathology and Parasitology, National Veterinary Institute, Technical University of Denmark, Frederiksberg C, Denmark
- * E-mail:
| |
Collapse
|
18
|
Sejersen H, Sørensen MT, Larsen T, Bendixen E, Ingvartsen KL. Liver protein expression in young pigs in response to a high-fat diet and diet restriction1. J Anim Sci 2013; 91:147-58. [DOI: 10.2527/jas.2012-5303] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- H. Sejersen
- Department of Animal Science, Aarhus University, AU Foulum, Tjele, Denmark
| | - M. T. Sørensen
- Department of Animal Science, Aarhus University, AU Foulum, Tjele, Denmark
| | - T. Larsen
- Department of Animal Science, Aarhus University, AU Foulum, Tjele, Denmark
| | - E. Bendixen
- Department of Animal Science, Aarhus University, AU Foulum, Tjele, Denmark
| | - K. L. Ingvartsen
- Department of Animal Science, Aarhus University, AU Foulum, Tjele, Denmark
| |
Collapse
|
19
|
McKnight LL, Myrie SB, MacKay DS, Brunton JA, Bertolo RF. Glucose tolerance is affected by visceral adiposity and sex, but not birth weight, in Yucatan miniature pigs. Appl Physiol Nutr Metab 2012; 37:106-14. [DOI: 10.1139/h11-142] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Epidemiological studies have linked small birth weight and lack of breastfeeding to type 2 diabetes mellitus. This study aimed to determine if (i) small birth weight promotes and (ii) suckling prevents the development of adiposity and diabetes biomarkers in a Yucatan miniature pig model. At 3 days of age, the intrauterine growth-restricted (IUGR) piglet (n = 6) was paired with a normal weight (NW), same-sex littermate (n = 6) and fed milk replacer for 4 weeks. A sow-fed normal weight littermate (n = 6) was also compared with the NW littermate to assess the effects of suckling. All pigs were fed a standard diet ad libitum for 5 h·day–1 from week 4. At 9.5 months, pigs underwent intravenous glucose tolerance (IVGTT) and insulin sensitivity tests (IST). At 10 months, tissues were harvested for fat analysis and pancreas histology. IUGR pigs demonstrated compensatory growth before sexual maturity and had greater subcutaneous fat depth; birth weight also negatively correlated with visceral fat content. Visceral and subcutaneous adiposity were greater in females than males. IVGTT and IST outcomes were not different due to birth weight or suckling. However, visceral adiposity was associated with several glucose tolerance outcomes and females were more glucose intolerant due to their greater adiposity. Pancreas insulin content or histology outcomes were not different. This model did not develop markers of type 2 diabetes mellitus because of small birth weight or formula feeding. However, visceral adiposity and sex were associated with glucose intolerance, which is consistent with data in humans.
Collapse
Affiliation(s)
- Leslie L. McKnight
- Department of Biochemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada
| | - Semone B. Myrie
- Department of Biochemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada
| | - Dylan S. MacKay
- Department of Biochemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada
| | - Janet A. Brunton
- Department of Biochemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada
| | - Robert F. Bertolo
- Department of Biochemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada
| |
Collapse
|
20
|
Azorín-Ortuño M, Yáñez-Gascón MJ, González-Sarrías A, Larrosa M, Vallejo F, Pallarés FJ, Lucas R, Morales JC, Tomás-Barberán FA, García-Conesa MT, Espín JC. Effects of long-term consumption of low doses of resveratrol on diet-induced mild hypercholesterolemia in pigs: a transcriptomic approach to disease prevention. J Nutr Biochem 2011; 23:829-37. [PMID: 21852083 DOI: 10.1016/j.jnutbio.2011.04.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Revised: 03/28/2011] [Accepted: 04/01/2011] [Indexed: 12/26/2022]
Abstract
Metabolic and cardiovascular diseases (CVDs) have risen to alarming proportions, and there is a need for therapeutic and preventive measures. The polyphenol resveratrol (RES) protects against CVDs, but in vivo molecular mechanisms responsible for protection are not yet understood. Peripheral blood mononuclear cells (PBMNCs) are involved in the development of atherosclerosis and metabolic disorders. The identification of PBMNCs genes responding to dietary compounds might help to understand the mechanisms underlying the effects of polyphenols. We determined gene expression differences between PBMNCs from pigs fed a high-fat diet manifesting a mild increase of cholesterol and pigs fed a high-fat diet containing low doses of RES. Although the consumption of RES did not modify the levels of cholesterol, microarray analyses indicated that some of the differentially expressed genes, collagens (COL1A, COL3A), lipoprotein lipase (LPL) and fatty-acid binding proteins (FABPs) involved in CVDs and lipid metabolism were up-regulated by the high-fat diet and down-regulated by RES. Reverse transcriptase polymerase chain reaction confirmed that RES and RES-containing grape extract prevented the induction of FABP4 in PBMNCs in female pigs fed a high-fat diet. Low micromolar concentrations of RES and its metabolite dihydroresveratrol exerted a minor but significant reducing effect on the induction of FABP4 expression in human macrophages treated with oxidized low-density lipoprotein. Our results show that the consumption of low doses of RES modulates the expression of genes related to lipid metabolism and metabolic disorders that are affected by a high-fat diet and suggest that some of the circulating RES metabolites may contribute to these effects.
Collapse
Affiliation(s)
- María Azorín-Ortuño
- Department Food Science and Technology, Research Group on Quality, Safety and Bioactivity of Plant Foods, CEBAS-CSIC, P.O. Box 164, 30100 Campus de Espinardo, Murcia, Spain
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Sturek M. Ca2+ regulatory mechanisms of exercise protection against coronary artery disease in metabolic syndrome and diabetes. J Appl Physiol (1985) 2011; 111:573-86. [PMID: 21596923 DOI: 10.1152/japplphysiol.00373.2011] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Chronic exercise attenuates coronary artery disease (CAD) in humans largely independent of reductions in risk factors; thus major protective mechanisms of exercise are directly within the coronary vasculature. Further, tight control of diabetes, e.g., blood glucose, can be detrimental. Accordingly, knowledge of mechanisms by which exercise attenuates diabetic CAD could catalyze development of molecular therapies. Exercise attenuates CAD (atherosclerosis) and restenosis in miniature swine models, which enable precise control of exercise parameters (intensity, duration, and frequency) and characterization of the metabolic syndrome (MetS) and diabetic milieu. Intracellular Ca(2+) is a pivotal second messenger for coronary smooth muscle (CSM) excitation-contraction and excitation-transcription coupling that modulates CSM proliferation, migration, and calcification. CSM of diabetic dyslipidemic Yucatan swine have impaired Ca(2+) extrusion via the plasmalemma Ca(2+) ATPase (PMCA), downregulation of L-type voltage-gated Ca(2+) channels (VGCC), increased Ca(2+) sequestration by the sarcoplasmic reticulum (SR) Ca(2+) ATPase (SERCA), increased nuclear Ca(2+) localization, and greater activation of K channels by Ca(2+) release from the SR. Endurance exercise training prevents Ca(2+) transport changes with virtually no effect on the diabetic milieu (glucose, lipids). In MetS Ossabaw swine transient receptor potential canonical (TRPC) channels are upregulated and exercise training reverses expression and TRPC-mediated Ca(2+) influx with almost no change in the MetS milieu. Overall, exercise effects on Ca(2+) signaling modulate CSM phenotype. Future studies should 1) selectively target key Ca(2+) transporters to determine definitively their causal role in atherosclerosis and 2) combine mechanistic studies with clinical outcomes, e.g., reduction of myocardial infarction.
Collapse
Affiliation(s)
- Michael Sturek
- Department of Cellular and Integrative Physiology, Indiana University School of Medicine, 635 Barnhill Dr., MS 385, Indianapolis, IN 46202-5120, USA.
| |
Collapse
|
22
|
Porcine models for the metabolic syndrome, digestive and bone disorders: a general overview. Animal 2010; 4:899-920. [DOI: 10.1017/s1751731110000200] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
|
23
|
Madsen MB, Birck MM, Fredholm M, Cirera S. Expression Studies of the Obesity Candidate GeneFTOin Pig. Anim Biotechnol 2009; 21:51-63. [DOI: 10.1080/10495390903381792] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
24
|
Chen H, Liu YQ, Li CH, Guo XM, Huang LJ. The susceptibility of three strains of Chinese minipigs to diet-induced type 2 diabetes mellitus. Lab Anim (NY) 2009; 38:355-63. [DOI: 10.1038/laban1109-355] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2008] [Accepted: 03/18/2009] [Indexed: 11/09/2022]
|
25
|
Christoffersen B, Ribel U, Raun K, Golozoubova V, Pacini G. Evaluation of different methods for assessment of insulin sensitivity in Gottingen minipigs: introduction of a new, simpler method. Am J Physiol Regul Integr Comp Physiol 2009; 297:R1195-201. [PMID: 19710388 DOI: 10.1152/ajpregu.90851.2008] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The use of animal models in diabetes research requires reliable tests for evaluation of insulin sensitivity and beta-cell function. Minipigs are being increasingly used in metabolic research, and the aim of this study was to compare different tests and indexes for evaluation of insulin sensitivity and beta-cell function in Göttingen minipigs. Hyperinsulinemic, isoglycemic clamp, intravenous (IVGTT) and oral glucose tolerance tests (OGTT), and a modified insulin tolerance test were performed in minipigs fed either low- or high-energy diet. Furthermore, the reproducibility of IVGTT-derived parameters was assessed. Previously described insulin sensitivity indexes [steady-state glucose infusion rate/glucose concentration/insulin concentration from clamp (M/G/I); oral glucose insulin sensitivity (OGIS) and ISI(comp) from OGTT; S(I) from minimal model analysis of IVGTT; and quantitative insulin sensitivity check index from fasting values] were calculated together with an insulin sensitivity index from the modified insulin tolerance test (ISI(ITT)) and a new simple index (S2) derived from the first 30 min of the IVGTT. beta-Cell function was assessed from the IVGTT and the OGTT. Reproducibility of the IVGTT-derived parameters was calculated as median intraindividual coefficient of variation (CV%).M/G/I correlated significantly only with S2 (P < 0.05, r = 0.54). S2 furthermore correlated with S(I) (P < 0.001, r = 0.81), ISI(ITT) (P < 0.001, r = 0.57), and the two indexes from OGTT, ISI(comp) (P < 0.001, r = 0.78) and OGIS (p < 0.05, r = 0.48). No correlation was found between beta-cell function indexes from OGTT and IVGTT. The median CV% of the new S2 index was 13. In conclusion, the new simple index of insulin sensitivity, S2, was revealed to be useful for evaluation of insulin sensitivity in pigs.
Collapse
|
26
|
Liu Y, Wang Z, Yin W, Li Q, Cai M, Zhang C, Xiao J, Hou H, Li H, Zu X. Severe insulin resistance and moderate glomerulosclerosis in a minipig model induced by high-fat/ high-sucrose/ high-cholesterol diet. Exp Anim 2007; 56:11-20. [PMID: 17283886 DOI: 10.1538/expanim.56.11] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
To develop a minipig model of type 2 diabetes that simulates the common manifestations of the metabolic abnormalities and resembles the kidney pathology of type 2 diabetes in the human population, male Chinese Bama minipigs were divided into 2 groups (5 in each) and fed with a control diet (CD) or high-fat/ high-sucrose/ high-cholesterol diet (HFSCD) for 5 months. The biochemical parameters of blood and urine, and the oral glucose tolerance test were monitored after the feeding program. The insulin resistance was estimated by the HOMA-IR index and the glucose elimination constant (K(G)), and beta-cell function by the HOMA-beta index and the acute insulin response (AIR). Glomerulosclerosis index (GSI) was semi-quantitated by the degree of glomerular lesions in kidney sections stained with Masson trichrome. Extracellular matrix deposition in the kidney was examined by the protein expression of type IV collagen, connective tissue growth factor (CTGF) and matrix metalloproteinases 2 (MMP-2) using immunohistochemistry. Feeding HFSCD to minipigs markedly caused hyperglycaemia, hyperinsulinaemia and dyslipidaemia. HOMA-IR was significantly increased while HOMA-beta, AIR and K(G) were obviously decreased in the HFSCD group compared with control group. Microalbuminuria, glucosuria and moderate glomerulosclerosis were exhibited in HFSCD-fed minipigs. The expression of type IV collagen and CTGF was elevated whereas that of MMP-2 was reduced in the kidneys of HFSCD group compared with the CD group. We concluded that feeding HFSCD to Chinese Bama minipigs for 5 months can induce humanoid type 2 diabetes and early-stage diabetic nephropathy, and accelerate extracellular matrix deposition and glomerulosclerosis.
Collapse
Affiliation(s)
- Yi Liu
- Institute of Cardiovascular Research, School of Life Sciences and Technology, Nanhua University, Hengyang, Hunan 421001, PR China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Sébert SP, Lecannu G, Sené S, Hucteau S, Chetiveaux M, Ouguerram K, Champ MMJ. Obesity induced during sexual maturation is linked to LDL-triacylglycerols in Yucatan miniature swine. Br J Nutr 2007; 94:282-9. [PMID: 16115364 DOI: 10.1079/bjn20051478] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The incidence of childhood obesity is rising dramatically throughout industrialised countries. To evaluate and study the impact of childhood obesity on lipoprotein metabolism, we developed a new animal model of premature obesity. Yucatan mini-pigs aged 4 months were studied over a 12-month period from childhood to adulthood. Animals were divided into two groups: the first group were overfed a Western misbalanced diet; the second group were normally fed a recommended human-type diet. Cholesterol and triacylglycerol concentrations in VLDL-, LDL- and HDL-lipoproteins were followed from baseline to adulthood by fast protein liquid chromatography. At 10 (the end of sexual maturation) and 16 months old (adulthood), liver, visceral and subcutaneous adipose tissues were sampled. Real-time RT-PCR was performed in order to compare apo AI, apo B, apo C-III, PPAR-α, insulin receptor and lipoprotein lipase gene expression between groups and ages. Differences between groups were observed only after sexual maturity. Adult overfed mini-pigs had a higher LDL-cholesterol:HDL-cholesterol ratio (P<0·05; 0·55 (SE 0·06) for overfedv. 0·42 (SE 0·04) for normally fed pigs at the tenth month of the study). In both groups, VLDL-triacylglycerol decreased (P<0·05). VLDL-triacylglycerol evolution in the overfed group was associated with an increase in LDL-triacylglycerol plasma concentrations (P<0·05) after sexual maturation. LDL-triacylglycerol concentration in overfed mini-pigs went from an average of 0·28 mmol/l before sexual maturation to reach an average concentration of 0·56 mmol/l afterwards. This phenomenon has never been observed in similar studies when obesity is induced in adult mini-pigs and may represent a specific hallmark of an obesity induced during sexual maturity.
Collapse
Affiliation(s)
- Sylvain P Sébert
- Human Nutrition and Gut Functions Unit, National Institute of Agronomic Research Rue de la Géraudière, BP 71627, 44316 Nantes Cedex 3, France
| | | | | | | | | | | | | |
Collapse
|
28
|
Model-based glycaemic control in critical care—A review of the state of the possible. Biomed Signal Process Control 2006. [DOI: 10.1016/j.bspc.2006.03.002] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
29
|
Bellinger DA, Merricks EP, Nichols TC. Swine Models of Type 2 Diabetes Mellitus: Insulin Resistance, Glucose Tolerance, and Cardiovascular Complications. ILAR J 2006; 47:243-58. [PMID: 16804199 DOI: 10.1093/ilar.47.3.243] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Dwight A Bellinger
- Department of Pathology and Laboratory Medicine and Division of Laboratory Animal Medicine, University of North Carolina, School of Medicine, Chapel Hill, NC, USA
| | | | | |
Collapse
|
30
|
Wong XW, Chase JG, Shaw GM, Hann CE, Lotz T, Lin J, Singh-Levett I, Hollingsworth LJ, Wong OSW, Andreassen S. Model predictive glycaemic regulation in critical illness using insulin and nutrition input: a pilot study. Med Eng Phys 2005; 28:665-81. [PMID: 16343972 DOI: 10.1016/j.medengphy.2005.10.015] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2005] [Revised: 10/06/2005] [Accepted: 10/31/2005] [Indexed: 01/08/2023]
Abstract
Stress-induced hyperglycaemia is prevalent in intensive care, impairing the immune response. Nutritional support regimes with high glucose content further exacerbate the problem. Tight glucose control has been shown to reduce mortality by up to 43% if levels are kept below 6.1 mmol/L. This research develops a control algorithm with insulin and nutritional inputs for targeted glucose control in the critically ill. Ethics approval for this research was granted by the Canterbury Ethics Committee. Proof-of-concept clinical pilot trials were conducted on intubated, insulin-dependent Christchurch ICU patients (n=7) on constant nutritional support. A target 10-15% reduction in glucose level per hour for a desired glucose level of 4-6 mmol/L was set. 43% and 91% of glucose targets were achieved within +/-5 and +/-20%, respectively. The mean error was 8.9% (0.5 mmol/L), with an absolute range [0, 2.9] mmol/L. End glucose levels were 40% lower compared to initial values. All large target errors are attributable to sudden changes in patient physiology at low glucose values, rather than systemic deficiencies. Target errors are consistent with and explainable by published sensor error distributions. The results show that intensive model-based glucose management with nutrition control reduced absolute glucose levels progressively while reducing the severity of glycaemic fluctuation even with significant inter-patient variability and time-varying physiological condition. Trials spanning longer periods of time are in development to verify the short-term pilot studies performed and to test the adaptability of the controller. Clinically, these results indicate potential in clinical use to reduce ICU mortality as well as reduce risk of severe complications.
Collapse
Affiliation(s)
- X W Wong
- Department of Mechanical Engineering, College of Engineering, University of Canterbury, and Department of Intensive Care, Christchurch Hospital, New Zealand.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Sébert SP, Lecannu G, Kozlowski F, Siliart B, Bard JM, Krempf M, Champ MMJ. Childhood obesity and insulin resistance in a Yucatan mini-piglet model: putative roles of IGF-1 and muscle PPARs in adipose tissue activity and development. Int J Obes (Lond) 2005; 29:324-33. [PMID: 15672115 DOI: 10.1038/sj.ijo.0802823] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To explore metabolic and cellular modifications induced during childhood obesity, in a novel animal model of obese mini-piglets. DESIGN A total of 10 four-month old Yucatan mini-pigs were followed from prepuberty to adulthood. Animals were divided into two groups. The first one had been overfed (OF) a western-type diet and the second one had been normally fed a control recommended human-type diet (NF). MEASUREMENTS Plasma insulin-like growth factor 1 (IGF-1), insulin, leptin, nonesterified fatty acids, triglycerides (TGs) and glucose were determined at sexual maturity and at young adulthood. Quantitative gene expressions of peroxysome-proliferator-activated receptors (PPARs), glucose transporter 4, insulin receptor, IGF-1, leptin and interleukin-6 (IL-6) in skeletal muscle, adipose tissue and liver were also measured at both stages. Adult insulin sensitivity was measured via euglycaemic-hyperinsulinaemic clamps. RESULTS Increased body weight in adult OF pigs was associated with increased body size and low insulin sensitivity. Sexually mature OF pigs had higher IGF-1 plasma concentrations than their lean littermates (P < 0.05). In the OF group, TGs and glucose were both decreased (P < 0.05). Muscle PPARgamma and alpha in OF pubescent pigs as compared to NF pigs were 11 times higher and 20 times lower, respectively (P < 0.01). CONCLUSION Obesity and insulin resistance induced by overfeeding mini-pigs during development and puberty were not associated with the cluster of metabolic modifications frequently observed in their adult littermates. Increased IGF-1 concentrations and modifications of skeletal muscle PPAR (alpha and gamma) expressions may help the young obese pig to partially regulate its glycaemia and triglyceridaemia through an increase of fat mass, which maintains its high insulin sensitivity.
Collapse
Affiliation(s)
- S P Sébert
- Unité des Fonctions Digestives et de Nutrition Humaine, Institut National de la Recherche Agronomique (INRA), Nantes, France
| | | | | | | | | | | | | |
Collapse
|
32
|
Xi S, Yin W, Wang Z, Kusunoki M, Lian X, Koike T, Fan J, Zhang Q. A minipig model of high-fat/high-sucrose diet-induced diabetes and atherosclerosis. Int J Exp Pathol 2005; 85:223-31. [PMID: 15312127 PMCID: PMC2517483 DOI: 10.1111/j.0959-9673.2004.00394.x] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Summary Type 2 diabetes is a major risk factor of the development of atherosclerosis in humans. However, studies examining mechanisms underlying diabetes-accelerated atherosclerosis have been limited by the lack of suitable humanoid animal models. Pigs have a cardiovascular system that is very similar to that of humans and is useful as a model for human physiology and pathophysiology. In this study, we established a new miniature pig model for studying dyslipidaemia and atherosclerosis in diabetes. Chinese Guizhou minipigs were fed a normal control diet or a high-fat/high-sucrose diet (HFSD) for 6 months. Plasma total cholesterol (TC), high-density lipoprotein cholesterol, triglyceride (TG), insulin and glucose were quantified at monthly intervals. The induction of insulin resistance and dysfunction of the pancreatic beta-cell were assessed by oral glucose tolerance test and insulin sensitivity test. The aortic fatty streak lesions were quantified following lipid staining with Sudan IV. During the feeding period, mild high plasma TC and TG were induced. At the end of 6 months, in HFSD-fed animals, the adipocytes were hypertrophic, fat deposit in the liver was observed, loss of pancreatic beta-cells was observed, and the aortic fatty streak lesions were clearly present in the animals' aortas. Our study established that miniature pigs that were fed a HFSD without adding dietary cholesterol developed insulin resistance, mild diabetes and atherosclerotic lesions. HFSD-fed miniature pigs may be good animal models for research on the treatment of diabetic dyslipidaemia complicated with atherosclerosis.
Collapse
Affiliation(s)
- Shoumin Xi
- Department of Biochemistry and Molecular Biology, Nanhua University School of Life Sciences and TechnologyHengyang, Hunan, China
| | - Weidong Yin
- Department of Biochemistry and Molecular Biology, Nanhua University School of Life Sciences and TechnologyHengyang, Hunan, China
- Institute of Cardiovascular Research, Nanhua University Medical SchoolHengyang, Hunan, China
| | - Zongbao Wang
- Department of Biochemistry and Molecular Biology, Nanhua University School of Life Sciences and TechnologyHengyang, Hunan, China
| | - Masataka Kusunoki
- Department of Internal Medicine, Faculty of Medicine, Aichi Medical UniversityNagakute-cho, Aichigunte, Japan
| | - Xin Lian
- Department of Biochemistry and Molecular Biology, Nanhua University School of Life Sciences and TechnologyHengyang, Hunan, China
| | - Tomonari Koike
- Laboratory of Cardiovascular Disease, Department of Pathology, Institute of Basic Medical Sciences, University of TsukubaTsukuba, Japan
| | - Jianglin Fan
- Laboratory of Cardiovascular Disease, Department of Pathology, Institute of Basic Medical Sciences, University of TsukubaTsukuba, Japan
| | - Qiuju Zhang
- Department of Biochemistry and Molecular Biology, Nanhua University School of Life Sciences and TechnologyHengyang, Hunan, China
| |
Collapse
|
33
|
Larsen MO, Juhl CB, Pørksen N, Gotfredsen CF, Carr RD, Ribel U, Wilken M, Rolin B. Beta-cell function and islet morphology in normal, obese, and obese beta-cell mass-reduced Göttingen minipigs. Am J Physiol Endocrinol Metab 2005; 288:E412-21. [PMID: 15479954 DOI: 10.1152/ajpendo.00352.2004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Herein, we bridge beta-cell function and morphology in minipigs. We hypothesized that different aspects of beta-cell dysfunction are present in obesity and obesity with reduced beta-cell mass by using pulsatile insulin secretion as an early marker. Measures for beta-cell function (glucose and arginine stimulation plus baseline and glucose-entrained pulsatile insulin secretion) and islet morphology were studied in long-term (19-20 mo) obese (n = 5) and obese beta-cell-reduced [nicotinamide + streptozotocin (STZ), n = 5] minipigs and normal controls, representing different stages in the development toward type 2 diabetes. Acute insulin response (AIR) to glucose and arginine were, surprisingly, normal in obese (0.3 g/kg glucose: AIR = 246 +/- 119 vs. 255 +/- 61 pM in control; 67 mg/kg arginine: AIR = 230 +/- 124 vs. 214 +/- 85 pM in control) but reduced in obese-STZ animals (0.3 g/kg glucose: AIR = 22 +/- 36, P < 0.01; arginine: AIR = 87 +/- 92 pM, P < 0.05 vs. control). Baseline pulsatile insulin secretion was reduced in obese (59 +/- 16 vs. 76 +/- 16% in control, P < 0.05) and more so in obese-STZ animals (43 +/- 13%, P < 0.01), whereas regularity during entrainment was increased in obese animals (approximate entropy: 0.85 +/- 0.14 vs. 1.13 +/- 0.13 in control, P < 0.01). Beta-cell mass (mg/kg body wt) was normal in obese and reduced in obese-STZ animals, with pancreatic fat infiltration in both groups. In conclusion, obesity and insulin resistance are not linked with a general reduction of beta-cell function, but dynamics of insulin secretion are perturbed. The data suggest a sequence in the development of beta-cell dysfunction, with the three groups representing stages in the progression from normal physiology to diabetes, and assessment of pulsatility as the single most sensitive marker of beta-cell dysfunction.
Collapse
Affiliation(s)
- M O Larsen
- Dept. of Pharmacology Research I, Pharmacology Research and Development, Novo Nordisk Park F6.1.30, Maaloev DK-2760, Denmark.
| | | | | | | | | | | | | | | |
Collapse
|
34
|
Larsen MO, Rolin B. Use of the Gottingen Minipig as a Model of Diabetes, with Special Focus on Type 1 Diabetes Research. ILAR J 2004; 45:303-13. [PMID: 15229377 DOI: 10.1093/ilar.45.3.303] [Citation(s) in RCA: 144] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Animal models of type 1 diabetes remain essential tools for investigation of the etiology and pathogenesis of the disease and, importantly, for the development of effective new treatments. Although a range of well-characterized and widely used models of type 1 diabetes in rodents are currently available, large animal models are a valuable complement to rodent models for both physiological and practical reasons. The pig is very useful in many aspects as a model for human physiology and pathophysiology because many organ systems of this species, as well as physiological and pathophysiological responses, resemble those of the human. The Göttingen minipig is particularly suitable for long-term studies because of its inherent small size and ease of handling, even at full maturity. Of particular relevance to the field of type 1 diabetes are the many similarities evident between humans and pigs with regard to pharmacokinetics of compounds after subcutaneous administration, structure and function of the gastrointestinal tract, morphology of the pancreas, and the overall metabolic status of the two species. Because spontaneous type 1-like diabetes is very rare in pigs, a model of the condition must be induced experimentally, either surgically or chemically. This process is discussed, and the use of the pig as a model in islet transplantation and diabetic complications is briefly summarized.
Collapse
Affiliation(s)
- Marianne O Larsen
- Department of Pharmacology Research I, Novo Nordisk A/S, Maaloev, Denmark
| | | |
Collapse
|
35
|
Larsen MO, Rolin B, Wilken M, Carr RD, Gotfredsen CF. Measurements of insulin secretory capacity and glucose tolerance to predict pancreatic beta-cell mass in vivo in the nicotinamide/streptozotocin Göttingen minipig, a model of moderate insulin deficiency and diabetes. Diabetes 2003; 52:118-23. [PMID: 12502501 DOI: 10.2337/diabetes.52.1.118] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Knowledge about beta-cell mass and/or function could be of importance for the early diagnosis and treatment of diabetes. However, measurement of beta-cell function as an estimate of beta-cell mass is currently the only method possible in humans. The present study was performed to investigate different functional tests as predictors of beta-cell mass in the Göttingen minipig. beta-cell mass was reduced in the Göttingen minipig with a combination of nicotinamide (100 [n = 6], 67 [n = 25], 20 [n = 2], or 0 mg/kg [n = 4]) and streptozotocin (125 mg/kg). Six normal pigs were included. An oral glucose tolerance test (OGTT) (n = 43) and insulin secretion test (n = 30) were performed and pancreata obtained for stereological determination of beta-cell mass. During OGTT, fasting glucose (r(2) = 0.1744, P < 0.01), area under the curve for glucose (r(2) = 0.2706, P < 0.001), maximum insulin secretion (r(2) = 0.2160, P < 0.01), and maximum C-peptide secretion (r(2) = 0.1992, P < 0.01) correlated with beta-cell mass. During the insulin secretion test, acute insulin response to 0.3 g/kg (r(2) = 0.6155, P < 0.0001) and 0.6 g/kg glucose (r(2) = 0.7321, P < 0.0001) and arginine (67 mg/kg) (r(2) = 0.7732, P < 0.0001) and maximum insulin secretion (r(2) = 0.8192, P < 0.0001) correlated with beta-cell mass. This study supports the use of functional tests to evaluate beta-cell mass in vivo and has established a validated basis for developing a mathematical method for estimation of beta-cell mass in vivo in the Göttingen minipig.
Collapse
Affiliation(s)
- Marianne O Larsen
- Department of Pharmacological Research I, Novo Nordisk A/S, Bagsvaerd, Denmark.
| | | | | | | | | |
Collapse
|