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Goutchtat R, Quenon A, Clarisse M, Delalleau N, Coddeville A, Gobert M, Gmyr V, Kerr-Conte J, Pattou F, Hubert T. Effects of subtotal pancreatectomy and long-term glucose and lipid overload on insulin secretion and glucose homeostasis in minipigs. Endocrinol Diabetes Metab 2023:e425. [PMID: 37144278 DOI: 10.1002/edm2.425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 03/30/2023] [Accepted: 04/10/2023] [Indexed: 05/06/2023] Open
Abstract
INTRODUCTION Nowadays, there are no strong diabetic pig models, yet they are required for various types of diabetes research. Using cutting-edge techniques, we attempted to develop a type 2 diabetic minipig model in this study by combining a partial pancreatectomy (Px) with an energetic overload administered either orally or parenterally. METHODS Different groups of minipigs, including Göttingen-like (GL, n = 17) and Ossabaw (O, n = 4), were developed. Prior to and following each intervention, metabolic assessments were conducted. First, the metabolic responses of the Göttingen-like (n = 3) and Ossabaw (n = 4) strains to a 2-month High-Fat, High-Sucrose diet (HFHSD) were compared. Then, other groups of GL minipigs were established: with a single Px (n = 10), a Px combined with a 2-month HFHSD (n = 6), and long-term intraportal glucose and lipid infusions that were either preceded by a Px (n = 4) or not (n = 4). RESULTS After the 2-month HFHSD, there was no discernible change between the GL and O minipigs. The pancreatectomized group in GL minipigs showed a significantly lower Acute Insulin Response (AIR) (18.3 ± 10.0 IU/mL after Px vs. 34.9 ± 13.7 IU/mL before, p < .0005). In both long-term intraportal infusion groups, an increase in the Insulinogenic (IGI) and Hepatic Insulin Resistance Indexes (HIRI) was found with a decrease in the AIR, especially in the pancreatectomized group (IGI: 4.2 ± 1.9 after vs. 1.5 ± 0.8 before, p < .05; HIRI (×10-5 ): 12.6 ± 7.9 after vs. 3.8 ± 4.3 before, p < .05; AIR: 24.4 ± 13.7 µIU/mL after vs. 43.9 ± 14.5 µIU/mL before, p < .005). Regardless of the group, there was no fasting hyperglycemia. CONCLUSIONS In this study, we used pancreatectomy followed by long-term intraportal glucose and lipid infusions to develop an original minipig model with metabolic syndrome and early signs of glucose intolerance. We reaffirm the pig's usefulness as a preclinical model for the metabolic syndrome but without the fasting hyperglycemia that characterizes diabetes mellitus.
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Affiliation(s)
- Rébecca Goutchtat
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur Lille, UFR3S, U1190 - Egid, Lille, France
| | - Audrey Quenon
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur Lille, UFR3S, U1190 - Egid, Lille, France
- Univ. Lille, CHU Lille, UFR3S, Département Hospitalo-Universitaire de Recherche et d'Enseignement (Dhure), Lille, France
| | | | - Nathalie Delalleau
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur Lille, UFR3S, U1190 - Egid, Lille, France
| | - Anaïs Coddeville
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur Lille, UFR3S, U1190 - Egid, Lille, France
| | - Mathilde Gobert
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur Lille, UFR3S, U1190 - Egid, Lille, France
| | - Valéry Gmyr
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur Lille, UFR3S, U1190 - Egid, Lille, France
| | - Julie Kerr-Conte
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur Lille, UFR3S, U1190 - Egid, Lille, France
| | - François Pattou
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur Lille, UFR3S, U1190 - Egid, Lille, France
| | - Thomas Hubert
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur Lille, UFR3S, U1190 - Egid, Lille, France
- Univ. Lille, CHU Lille, UFR3S, Département Hospitalo-Universitaire de Recherche et d'Enseignement (Dhure), Lille, France
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Miller NE, Steptoe A. Pericardial Fat, Socioeconomic Status, and Biological Responses to Acute Mental Stress. Psychosom Med 2023; 85:280-288. [PMID: 36705572 PMCID: PMC10082067 DOI: 10.1097/psy.0000000000001169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 11/14/2022] [Indexed: 01/27/2023]
Abstract
OBJECTIVE Central adiposity is associated with impaired biological responses to mental stress, and socioeconomic status (SES) might moderate this relationship. However, evidence for associations between pericardial fat, a fat depot implicated in the pathogenesis of cardiovascular disease (CVD), with cardiovascular and inflammatory responses to mental stress is lacking, and moderation by SES is unknown. METHODS The sample was 473 healthy men and women (mean age = 62.8 years) from the Whitehall II study. Cardiovascular and inflammatory responses to laboratory-induced mental stress, consisting of a 5-minute Stroop task and 5-minute mirror tracing task, were assessed. Pericardial fat volume was measured using electron bean computed tomography and adjusted for body surface area. SES was defined by grade of employment within the British civil service (higher/intermediate/lower). RESULTS Pericardial fat was associated with lower heart rate variability, raised heart rate, plasma interleukin-6, fibrinogen, and C-reactive protein at baseline. Furthermore, greater pericardial fat was associated with lower systolic blood pressure reactivity to mental stress, independent of sociodemographics, smoking status, waist-to-hip ratio, and baseline systolic blood pressure. There were no interactions between pericardial fat and SES for any outcome. CONCLUSIONS Greater pericardial fat was associated with numerous cardiovascular and inflammatory factors implicated in CVD. It was also related to reduced systolic blood pressure reactivity to acute mental stress, independent of central adiposity and baseline systolic blood pressure. This association did not vary by SES. Reduced systolic blood pressure reactivity to mental stress might contribute to the association between greater pericardial fat and CVD.
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Reactivation of PPAR α alleviates myocardial lipid accumulation and cardiac dysfunction by improving fatty acid β-oxidation in Dsg2-deficient arrhythmogenic cardiomyopathy. Acta Pharm Sin B 2023; 13:192-203. [PMID: 36815030 PMCID: PMC9939300 DOI: 10.1016/j.apsb.2022.05.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/27/2022] [Accepted: 04/02/2022] [Indexed: 02/07/2023] Open
Abstract
Arrhythmogenic cardiomyopathy (ACM), a fatal heart disease characterized by fibroadipocytic replacement of cardiac myocytes, accounts for 20% of sudden cardiac death and lacks effective treatment. It is often caused by mutations in desmosome proteins, with Desmoglein-2 (DSG2) mutations as a common etiology. However, the mechanism underlying the accumulation of fibrofatty in ACM remains unknown, which impedes the development of curative treatment. Here we investigated the fat accumulation and the underlying mechanism in a mouse model of ACM induced by cardiac-specific knockout of Dsg2 (CS-Dsg2 -/-). Heart failure and cardiac lipid accumulation were observed in CS-Dsg2 -/- mice. We demonstrated that these phenotypes were caused by decline of fatty acid (FA) β-oxidation resulted from impaired mammalian target of rapamycin (mTOR) signaling. Rapamycin worsened while overexpression of mTOR and 4EBP1 rescued the FA β-oxidation pathway in CS-Dsg2 -/- mice. Reactivation of PPARα by fenofibrate or AAV9-Pparα significantly alleviated the lipid accumulation and restored cardiac function. Our results suggest that impaired mTOR-4EBP1-PPARα-dependent FA β-oxidation contributes to myocardial lipid accumulation in ACM and PPARα may be a potential target for curative treatment of ACM.
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Cluzel GL, Ryan PM, Herisson FM, Caplice NM. High-fidelity porcine models of metabolic syndrome: a contemporary synthesis. Am J Physiol Endocrinol Metab 2022; 322:E366-E381. [PMID: 35224983 DOI: 10.1152/ajpendo.00413.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This review aims to describe and compare porcine models of metabolic syndrome. This syndrome and its associated secondary comorbidities are set to become the greatest challenge to healthcare providers and policy makers in the coming century. However, an incomplete understanding of the pathogenesis has left significant knowledge gaps in terms of efficacious therapeutics. To further our comprehension and, in turn, management of metabolic syndrome, appropriate high-fidelity models of the disease complex are of great importance. In this context, our review aims to assess the most promising porcine models of metabolic syndrome currently available for their similarity to the human phenotype. In addition, we aim to highlight the strengths and shortcomings of each model in an attempt to identify the most appropriate application of each. Although no porcine model perfectly recapitulates the human metabolic syndrome, several pose satisfactory approximations. The Ossabaw miniature swine in particular represents a highly translatable model that develops each of the core parameters of the syndrome with many of the associated secondary comorbidities. Future high-fidelity porcine models of metabolic syndrome need to focus on secondary sequelae replication, which may require extended induction period to reveal.
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Affiliation(s)
- Gaston L Cluzel
- Centre for Research in Vascular Biology, University College Cork, Cork, Ireland
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Paul M Ryan
- Centre for Research in Vascular Biology, University College Cork, Cork, Ireland
- Department of Paediatrics, University of Toronto, Toronto, Ontario, Canada
| | - Florence M Herisson
- Centre for Research in Vascular Biology, University College Cork, Cork, Ireland
- APC Microbiome Ireland, University College Cork, Cork, Ireland
| | - Noel M Caplice
- Centre for Research in Vascular Biology, University College Cork, Cork, Ireland
- APC Microbiome Ireland, University College Cork, Cork, Ireland
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Nyvad J, Lerman A, Lerman LO. With a Little Help From My Friends: the Role of the Renal Collateral Circulation in Atherosclerotic Renovascular Disease. Hypertension 2022; 79:717-725. [PMID: 35135307 PMCID: PMC8917080 DOI: 10.1161/hypertensionaha.121.17960] [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: 11/16/2022]
Abstract
The collateral circulation can adapt to bypass major arteries with limited flow and serves a crucial protective role in coronary, cerebral, and peripheral arterial disease. Emerging evidence indicates that the renal collateral circulation can similarly adapt and thereby limit kidney ischemia in atherosclerotic renovascular disease. These adaptations predominantly include recruitment of preexisting microvessels for arteriogenesis, with de novo vessel formation playing a limited role. Yet, adaptations of the renal collateral circulation in renovascular disease are often insufficient to fully compensate for the limited flow within an obstructed renal artery and may be hampered by the severity of obstruction or patient comorbidities. Experimental strategies have attempted to circumvent limitations of collateral formation and improve the prognosis of patients with various ischemic vascular territories. These have included pharmacological approaches such as endothelial growth factors, renin-angiotensin-aldosterone system blockade, and If-channel-blockers, as well as interventions like preconditioning, exercise, enhanced external counter-pulsation, and low-energy shock-wave therapy. However, few of these strategies have been implemented in atherosclerotic renovascular disease. This review summarizes current understanding regarding the development of renal collateral circulation in atherosclerotic renovascular disease. Studies are needed to apply lessons learned in other vascular beds in the setting of atherosclerotic renovascular disease to develop new treatment regimens for this patient group.
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Affiliation(s)
- Jakob Nyvad
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN. (J.N., L.O.L.).,Department of Nephrology and Hypertension, Aarhus University Hospital, Aarhus, Denmark (J.N.)
| | - Amir Lerman
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN. (A.L.)
| | - Lilach O Lerman
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN. (J.N., L.O.L.)
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Romanov A, Minin S, Nikitin N, Ponomarev D, Shabanov V, Losik D, Steinberg JS. The relationship between global cardiac and regional left atrial sympathetic innervation and epicardial fat in patients with atrial fibrillation. Ann Nucl Med 2021; 35:1079-1088. [PMID: 34128159 DOI: 10.1007/s12149-021-01643-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/08/2021] [Indexed: 10/21/2022]
Abstract
AIM To investigate the relationship between epicardial adipose tissue (EAT) volume and distribution and the parameters of global cardiac and regional left atrial (LA) sympathetic activity in patients with atrial fibrillation (AF). METHODS AND RESULTS The data of the 45 consecutive patients scheduled for an index catheter ablation (CA) for AF were analyzed. Total and peri-atrial EAT volumes were measured by cardiac CT. Parameters of global cardiac sympathetic activity and discrete sympathetic regions around LA were assessed by 123I-mIBG SPECT/CT. The patients were followed up for AF recurrences assessment during 12 months after CA. A total of 133 (mean per patient 2.96 ± 1.07) discrete 123I-mIBG uptake areas (DUAs), corresponding to typical anatomical locations of LA ganglionated plexi (GP), were identified. Peri-atrial EAT volume was associated with the number of DUAs (regression estimate, 5.1 [95% CI, 0.3-9.9], p = 0.03). There was no statistically significant association between either total or peri-atrial EAT volumes and risks of AF recurrence. The washout rate (WR) was associated with reduced risk of AF recurrence (HR = 0.95; 95% CI 0.92-0.99; p = 0.01), while left ventricular (LV) myocardium 123I-mIBG summed defect score (SDS) was linked to increased hazards of AF recurrence (HR = 1.04; 95% CI 1.01-1.08; p = 0.03). CONCLUSION Peri-atrial EAT volume is associated with regions of sympathetic activity corresponding to typical anatomical locations of LA GP. The WR was associated with reduced risk of AF recurrence while LV myocardial SDS was linked to increased hazards of AF recurrence.
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Affiliation(s)
- Alexander Romanov
- E. Meshalkin National Medical Research Center of the Ministry of Health of the Russian Federation, Rechkunovskaya str.15, 630055, Novosibirsk, Russian Federation
| | - Stanislav Minin
- E. Meshalkin National Medical Research Center of the Ministry of Health of the Russian Federation, Rechkunovskaya str.15, 630055, Novosibirsk, Russian Federation
| | - Nikita Nikitin
- E. Meshalkin National Medical Research Center of the Ministry of Health of the Russian Federation, Rechkunovskaya str.15, 630055, Novosibirsk, Russian Federation.
| | - Dmitry Ponomarev
- E. Meshalkin National Medical Research Center of the Ministry of Health of the Russian Federation, Rechkunovskaya str.15, 630055, Novosibirsk, Russian Federation
| | - Vitaly Shabanov
- E. Meshalkin National Medical Research Center of the Ministry of Health of the Russian Federation, Rechkunovskaya str.15, 630055, Novosibirsk, Russian Federation
| | - Denis Losik
- E. Meshalkin National Medical Research Center of the Ministry of Health of the Russian Federation, Rechkunovskaya str.15, 630055, Novosibirsk, Russian Federation
| | - Jonathan S Steinberg
- Clinical Cardiovascular Research Center, School of Medicine & Dentistry, University of Rochester, Rochester, NY, USA
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