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Ishaq A, Tchkonia T, Kirkland JL, Siervo M, Saretzki G. Palmitate induces DNA damage and senescence in human adipocytes in vitro that can be alleviated by oleic acid but not inorganic nitrate. Exp Gerontol 2022; 163:111798. [PMID: 35390489 PMCID: PMC9214712 DOI: 10.1016/j.exger.2022.111798] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/28/2022] [Accepted: 03/31/2022] [Indexed: 11/22/2022]
Abstract
Hypertrophy in white adipose tissue (WAT) can result in sustained systemic inflammation, hyperlipidaemia, insulin resistance, and onset of senescence in adipocytes. Inflammation and hypertrophy can be induced in vitro using palmitic acid (PA). WAT adipocytes have innately low β-oxidation capacity, while inorganic nitrate can promote a beiging phenotype, with promotion of β-oxidation when cells are exposed to nitrate during differentiation. We hypothesized that treatment of human adipocytes with PA in vitro can induce senescence, which might be attenuated by nitrate treatment through stimulation of β-oxidation to remove accumulated lipids. Differentiated subcutaneous and omental adipocytes were treated with PA and nitrate and senescence markers were analyzed. PA induced DNA damage and increased p16INK4a levels in both human subcutaneous and omental adipocytes in vitro. However, lipid accumulation and lipid droplet size increased after PA treatment only in subcutaneous adipocytes. Thus, hypertrophy and senescence seem not to be causally associated. Contrary to our expectations, subsequent treatment of PA-induced adipocytes with nitrate did not attenuate PA-induced lipid accumulation or senescence. Instead, we found a significantly beneficial effect of oleic acid (OA) on human subcutaneous adipocytes when applied together with PA, which reduced the DNA damage caused by PA treatment.
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Affiliation(s)
- Abbas Ishaq
- Biosciences Institute, Campus for Ageing and Vitality, Newcastle upon Tyne, UK
| | - Tamara Tchkonia
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, United States of America
| | - James L Kirkland
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, United States of America
| | - Mario Siervo
- Human Nutrition Research Centre, Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK; School of Life Sciences, University of Nottingham, Queen's Medical Centre, Nottingham, UK
| | - Gabriele Saretzki
- Biosciences Institute, Campus for Ageing and Vitality, Newcastle upon Tyne, UK.
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Miranda RA, Pietrobon CB, Bertasso IM, Rodrigues VST, Lopes BP, Calvino C, de Oliveira E, de Moura EG, Lisboa PC. Early weaning leads to specific glucocorticoid signalling in fat depots of adult rats. Endocrine 2020; 67:180-189. [PMID: 31494802 DOI: 10.1007/s12020-019-02080-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 08/30/2019] [Indexed: 12/25/2022]
Abstract
PURPOSE Early weaning (EW) is a stressful condition that programmes a child to be overweight in adult life. Fat mass depends on glucocorticoids (GC) to regulate adipogenesis and lipogenesis. We hypothesised that the increased adiposity in models of EW was due to a disturbed HPA axis and/or disrupted GC function. METHODS We used two experimental models, pharmacological early weaning (PEW, dams were bromocriptine-treated) and non-pharmacological early weaning (NPEW, dams' teats were wrapped with a bandage), which were initiated during the last 3 days of lactation. Offspring from both genders was analysed on postnatal day 180. RESULTS Offspring in both models were overweight with increased visceral fat mass, but plasma corticosterone was increased in both genders in the PEW group but not the NPEW group. NPEW males had increased GRα expression in visceral adipose tissue (VAT), and GRα expression decreased in PEW males in subcutaneous adipose tissue (SAT). Females in both EW groups had increased 11βHSD1 expression in SAT. PEW males had increased C/EBPβ expression in SAT. PEW females had lower PPARy and FAS expression in VAT than the NPEW females. We detected a sex dimorphism in VAT and SAT in the EW groups regarding 11βHSD1, GRα and C/EBPβ expression. CONCLUSIONS The accumulated adiposity induced by EW exhibited distinct mechanisms depending on gender, specific fat deposition and GC metabolism and action. The higher proportion of VAT/SAT in both sets of EW males may be related to the action of GC in these tissues, and the higher conversion of GC in SAT in females may explain the differences in the fat distribution.
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Affiliation(s)
- Rosiane Aparecida Miranda
- Laboratory of Endocrine Physiology, Biology Institute, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil
| | - Carla Bruna Pietrobon
- Laboratory of Endocrine Physiology, Biology Institute, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil
| | - Iala Milene Bertasso
- Laboratory of Endocrine Physiology, Biology Institute, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil
| | - Vanessa S Tavares Rodrigues
- Laboratory of Endocrine Physiology, Biology Institute, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil
| | - Bruna Pereira Lopes
- Laboratory of Endocrine Physiology, Biology Institute, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil
| | - Camila Calvino
- Laboratory of Endocrine Physiology, Biology Institute, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil
| | - Elaine de Oliveira
- Laboratory of Endocrine Physiology, Biology Institute, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil
| | - Egberto Gaspar de Moura
- Laboratory of Endocrine Physiology, Biology Institute, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil
| | - Patrícia C Lisboa
- Laboratory of Endocrine Physiology, Biology Institute, Rio de Janeiro State University, Rio de Janeiro, RJ, Brazil.
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Chen Y, Yu Y, Qiao J, Zhu L, Xiao Z. Mineralocorticoid receptor excessive activation involved in glucocorticoid-related brain injury. Biomed Pharmacother 2019; 122:109695. [PMID: 31812016 DOI: 10.1016/j.biopha.2019.109695] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 11/15/2019] [Accepted: 11/22/2019] [Indexed: 02/05/2023] Open
Abstract
The mechanisms involved in brain damage during chronic glucocorticoid exposure are poorly understood. Since mineralocorticoid receptor (MR) activation has been proven to be important in the pathophysiology of vascular damage and MRs are highly expressed in many brain regions, we hypothesized that the cerebral injury observed in subjects with Cushing syndrome is in part associated with the overactivation of MR. The aim of this study was to determine whether the cerebral injury observed in chronic hyperglucocorticoidemia animal models is related to excessive MR activation. Male SD rats were divided into five groups: vehicle, hydrocortisone (HC, 5 mg/kg/day, i.g.), HC + spironolactone (SL, 20 mg/kg/d in chow), dexamethasone (DXM, 0.25 mg/kg/day, i.g.), and DXM + SL (20 mg/kg/d in chow). Compared to the vehicle-treated group, HC-treated rats had higher blood pressure and higher levels of cerebral vascular fibrosis, cortical/hippocampal atrophy, reactive oxygen species (ROS) production and proinflammatory gene expression. However, in HC-treated animals, treatment with SL markedly alleviated ROS production, cerebral and cerebrovascular morphological changes and inflammation but failed to reduce blood pressure. In contrast, DXM induced no cerebral morphological changes except fibrosis in cerebral vessels, an effect that was not ameliorated by SL treatment. These findings demonstrate that the excessive MR activation observed following chronic hyperglucocorticoidemia exposure contributes to cerebrovascular fibrosis and remodeling and promotes neural apoptosis in the cerebral cortex/hippocampus.
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Affiliation(s)
- Yaxi Chen
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Yerong Yu
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
| | - Jingtao Qiao
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Leilei Zhu
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Zhen Xiao
- Department of Endocrinology and Metabolism, West China Hospital, Sichuan University, Chengdu, Sichuan, China
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Ferreira TDS, Barreto Silva MI, da Costa MS, Pontes KSDS, Castro FG, Antunes VP, Rosina KTDC, Menna Barreto APM, Souza E, Klein MRST. High abdominal adiposity and low phase angle in overweight renal transplant recipients. Clin Transplant 2019; 33:e13654. [PMID: 31241791 DOI: 10.1111/ctr.13654] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 05/19/2019] [Accepted: 06/20/2019] [Indexed: 12/14/2022]
Abstract
Obesity is associated with increased risk of cardiovascular disease (CVD). Body mass index (BMI) is the most used parameter for obesity screening. However, the evaluation of CVD risk in overweight individuals should include the assessment of body fat distribution and body composition. Renal transplant recipients (RTR) have a high CVD risk and frequently present weight gain and loss of lean mass. The aim of this study was to evaluate body fat distribution and body composition in overweight RTR. This cross-sectional study was conducted with 86 RTR and 86 hypertensive individuals (comparison group, CG) presenting BMI 25-35 Kg/m2 and 45-70 years. Anthropometric evaluation included BMI, waist circumference, waist-to-height ratio, and a body shape index. Body composition was evaluated with bioelectrical impedance analysis (BIA). Glomerular filtration rate was estimated (eGFR) by CKD-EPI equation. RTR group (RTRG) and CG presented similar age and BMI. RTRG when compared to CG presented lower percentage of women and eGFR; higher central adiposity; and lower values of reactance, intracellular water, body cell mass and phase angle, more consistently observed in women. This study suggests that overweight RTR present higher abdominal adiposity and impairment in BIA parameters that are sensitive indicators of impaired membrane integrity, water distribution, and body cell mass.
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Affiliation(s)
- Thaís da Silva Ferreira
- Rio de Janeiro State University, Rio de Janeiro, Brazil.,Federal University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Maria Inês Barreto Silva
- Rio de Janeiro State University, Rio de Janeiro, Brazil.,Federal University of the State of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | | | | | | | | | - Ana Paula Medeiros Menna Barreto
- Rio de Janeiro State University, Rio de Janeiro, Brazil.,Federal University of Rio de Janeiro (Macaé Campus), Rio de Janeiro, Brazil
| | - Edison Souza
- Rio de Janeiro State University, Rio de Janeiro, Brazil
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Jerez-Cepa I, Gorissen M, Mancera JM, Ruiz-Jarabo I. What can we learn from glucocorticoid administration in fish? Effects of cortisol and dexamethasone on intermediary metabolism of gilthead seabream (Sparus aurata L.). Comp Biochem Physiol A Mol Integr Physiol 2019; 231:1-10. [PMID: 30690148 DOI: 10.1016/j.cbpa.2019.01.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/20/2018] [Accepted: 01/21/2019] [Indexed: 02/06/2023]
Abstract
In aquaculture facilities fish welfare could be compromised due to stressors. Fish deal with stress, inter alia, through the activation of the hypothalamic-pituitary-interrenal endocrine axis and, as a result, corticosteroids are released into the blood. Recent studies have described that corticosteroids actions depend on the specific affinities to their receptors, and the subsequent differentiated responses. Cortisol is the main corticosteroid hormone in teleost fish, being its actions dependent on the intensity and time of exposure to stressors. Short-term effects of corticosteroids are well described, but long-term effects, including changes in the energy management directly affecting growth and survival, are less understood in fish. Here we show the effects of chronic oral administration of cortisol and the synthetic glucocorticoid dexamethasone (DXM) on the intermediary metabolism of the gilthead seabream (Sparus aurata). We described a higher energy expenditure associated to both corticosteroids resulting in lower growth rates of fish. Moreover, the effects of these compounds were tissue-dependant, with differences between both hormones. Thus, cortisol-fed animals accumulated triglycerides in the liver, while DXM treatment led to glycogen storage. Cortisol and DXM stimulated amino acids catabolism and gluconeogenic pathways in muscle and gills, but the effects were significantly enhanced in DXM-fed fish. The described effects highlighted differentiated mechanisms of action associated to both corticosteroids under chronic stress conditions. Further studies should aim at describing those pathways in detail, with special attention to the functionality of glucocorticoid receptor isoforms. The effects described here for S. aurata juveniles, may serve as a basis to assess long-term stress in future comparative studies with other aquaculture species.
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Affiliation(s)
- I Jerez-Cepa
- Department of Biology, Faculty of Marine and Environmental Sciences, Instituto Universitario de Investigación Marina (INMAR), Universidad de Cádiz, Campus de Excelencia Internacional del Mar (CEI·MAR), Av. República Saharaui s/n, E-11510 Puerto Real, Cádiz, Spain.
| | - M Gorissen
- Radboud University, Institute for Water and Wetland Research, Department of Animal Ecology and Physiology, Heyendaalseweg 135, 6525 AJ Nijmegen, the Netherlands.
| | - J M Mancera
- Department of Biology, Faculty of Marine and Environmental Sciences, Instituto Universitario de Investigación Marina (INMAR), Universidad de Cádiz, Campus de Excelencia Internacional del Mar (CEI·MAR), Av. República Saharaui s/n, E-11510 Puerto Real, Cádiz, Spain.
| | - I Ruiz-Jarabo
- Department of Biology, Faculty of Marine and Environmental Sciences, Instituto Universitario de Investigación Marina (INMAR), Universidad de Cádiz, Campus de Excelencia Internacional del Mar (CEI·MAR), Av. República Saharaui s/n, E-11510 Puerto Real, Cádiz, Spain.
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Noyin K, Akpinar E, Cadirci E, Cinar I, Aydin P. THE EFFECTS OF VARIOUS DOSES OF PREDNISOLONE ADMINISTRATION ON SERUM VASPIN LEVELS IN RATS. ACTA ENDOCRINOLOGICA (BUCHAREST, ROMANIA : 2005) 2018; 14:320-323. [PMID: 31149278 PMCID: PMC6525765 DOI: 10.4183/aeb.2018.320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIM The aim of this study was to investigate the dose-dependent effects of prednisolone administration on serum vaspin levels and correlate this with changes in the BMI and lipogenesis in rats. MATERIALS AND METHODS Twenty-four albino Wistar male rats weighing between 190-240 g were divided into four groups, three experimental (5 mg/kg, 10 mg/kg, and 20 mg/kg prednisolone) and one control. The prednisolone groups were given once-daily doses for 30 days, orally. In addition, the rats were weighed, and their height and waist circumferences were measured once a week. At the end of 30 days, vaspin and glucose levels were measured from blood samples. RESULTS In the prednisolone groups, the vaspin levels significantly increased when compared with the control group. The control group has a serum vaspin level of 155 ± 20.99 pg/mL and this level has been increased by prednisolone administration in a dose dependent manner. In the prednisolone groups, especially the 10 mg/kg and 20 mg/kg groups, the glucose levels increased in a dose dependent fashion. CONCLUSION Prednisolone administration significantly increased serum glucose and vaspin levels in a dose dependent manner, indicating that the increase in the serum vaspin levels could be related to the increase in the serum glucose concentration. Vaspin can be a molecule that is released in response to increased glucose and can be a rebound defense mechanism to modulate the blood glucose concentration. We suggest vaspin as a potential target for the treatment and diagnosis of diabetes mellitus and other metabolic disorders.
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Affiliation(s)
- K. Noyin
- Ataturk University, Faculty of Medicine, Department of Pharmacology, Erzurum, Turkey
| | - E. Akpinar
- Ataturk University, Faculty of Medicine, Department of Pharmacology, Erzurum, Turkey
| | - E. Cadirci
- Ataturk University, Faculty of Medicine, Department of Pharmacology, Erzurum, Turkey
| | - I. Cinar
- Ataturk University, Faculty of Medicine, Department of Pharmacology, Erzurum, Turkey
| | - P. Aydin
- Erzurum Regional Training and Research Hospital, Department of Anesthesiology and Reanimation, Erzurum, Turkey
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