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Wronska A, Zubrzycki A, Kotlarz G, Kmiec Z. Fenofibrate mildly stimulates browning-associated expression in white adipose tissues of young but not old male rats. J Physiol Pharmacol 2023; 74. [PMID: 37453093 DOI: 10.26402/jpp.2023.2.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 04/30/2023] [Indexed: 07/18/2023]
Abstract
The aim of this study was to examine the effects of the hypolipemic drug fenofibrate (FF) and aging on the expression of factors/enzymes involved in brown adipose tissue (BAT) function and browning of white adipose tissue epididymal (eWAT) and subcutaneous (sWAT) depots. Young-adult and old male Wistar rats were fed standard chow (control) or supplemented with 0.1% or 0.5% FF for 30 days. Tissue samples were analysed for gene expression and protein content, and stained with Oil Red O or hematoxylin and eosin. In BAT of young rats, 0.5% FF increased only Cbp/p300 interacting transactivator with Glu/Asp rich carboxy-terminal domain 1 (CITED1) protein content and Fgf21 and Gpr109A mRNA expression. The expression of oxidative metabolism related genes (Pgc1α, Cpt1b, Mcad) decreased after 0.5% FF. In BAT of old rats, FF did not affect UCP1 and CITED1 content and had little effect on gene expression. Oil Red O staining of BAT revealed no changes in lipid droplet area upon treatment in either age group. In eWAT of young rats, 0.1FF elevated UCP1 protein content and Ucp1, Pgc-1α, and Mcad expression, whereas 0.5% FF increased PPARα content and Pgc-1α, Cpt1b, Mcad, and Gpr109A levels. In eWAT of old rats, only 0.1FF increased Pgc1α and Mcad expression. In both age groups median cell area of eWAT adipocytes was reduced after 0.5% FF. In sWAT Ucp1 gene expression was very low and UCP1 protein was undetectable. FF upregulated Ucp1, Cited1, Eva1, and Cpt1b expression in sWAT of young rats, with diminished effects in old rats. In both age groups 0.5% FF increased Fgf21 expression in sWAT. Median cell area of sWAT adipocytes decreased only in young rats treated with 0.5% FF. Our results reveal that fenofibrate differentially affects gene expression in BAT, with diminished effects in old compared to young rats. In WAT of young rats FF modestly stimulates the expression of factors/enzymes involved in lipid oxidative metabolism and browning. Aging reduces both these effects. Gpr109A may present a novel gene target upregulated by FF in BAT and eWAT.
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Affiliation(s)
- A Wronska
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, Gdansk, Poland.
| | - A Zubrzycki
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, Gdansk, Poland
| | - G Kotlarz
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, Gdansk, Poland
| | - Z Kmiec
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, Gdansk, Poland
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Zubrzycki A, Wronska A, Zauszkiewicz-Pawlak A, Kmiec Z. Short-term fenofibrate treatment improves ultrastructure of hepatocytes of old rats. Folia Histochem Cytobiol 2021; 59:167-177. [PMID: 34515330 DOI: 10.5603/fhc.a2021.0018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 08/24/2021] [Indexed: 11/25/2022] Open
Abstract
INTRODUCTION Fenofibrate (FN) is a hypolipemic drug used for the treatment of mixed dyslipidemia. Since in our previous study FN administration to young and old rats adversely affected the serum activity of liver marker enzymes, we decided to examine the effects of FN on liver ultrastructure of young and old animals. MATERIAL AND METHODS Young and old rats were fed standard rodent chow supplemented with 0.1% FN for 30 days. Liver samples obtained from animals under full anesthesia were processed by routine methods to obtain ultrathin and histological sections for the examination by light microscopy (LM) and transmission electron microscopy (TEM). Furthermore, liver lysates were analyzed by Western blotting for the expression of the autophagy-related proteins LC3A/B and beclin 1. RESULTS The ultrastructure of hepatocytes in both age groups was well-preserved, with the presence of abundant mitochondria, numerous peroxisomes and lysosomes, glycogen stored in the form of rosettes, and occasionally autolysosomes. However, hepatocytes of old control rats contained less mitochondria and peroxisomes, and more lipid droplets than cells of young animals. The effects of FN on liver ultrastructure were age-depended. FN increased the relative number of mitochondria and peroxisomes in the hepatocytes of old, and did not affect their number in young rats. Moreover, FN decreased and increased the relative number of lipid droplets in the hepatocytes of old and young rats, respectively. At the LM level, Oil Red O staining revealed smaller and larger lipid droplets within hepatocytes and non-parenchymal liver cells. In the livers of young and old rats lipid droplets were distributed mainly in the periportal zones of hepatic lobules. Morphometric analysis confirmed that livers of control old rats contained more lipid-stainable areas than those of young ones; however, no effect of FN was observed either in young or old rats. Despite larger size of autolysosomes and autophagic vacuoles in hepatocytes of old rats, the expression of autophagy-related proteins did not differ in the livers of control and fenofibrate-treated young and old animals. CONCLUSIONS The results of our study suggest that fenofibrate, apart from its hypolipemic action, may have beneficial effect on the energy metabolism in the liver of old individuals by increasing the number of mitochondria and peroxisomes in hepatocytes.
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Affiliation(s)
| | - Agata Wronska
- Department of Histology, Medical University of Gdansk, Gdansk
| | | | - Zbigniew Kmiec
- Department of Histology, Medical University of Gdansk, Gdansk
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Wierzbicki PM, Klacz J, Kotulak-Chrzaszcz A, Wronska A, Stanislawowski M, Rybarczyk A, Ludziejewska A, Kmiec Z, Matuszewski M. Prognostic significance of VHL, HIF1A, HIF2A, VEGFA and p53 expression in patients with clear‑cell renal cell carcinoma treated with sunitinib as first‑line treatment. Int J Oncol 2019; 55:371-390. [PMID: 31268155 PMCID: PMC6615924 DOI: 10.3892/ijo.2019.4830] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 05/30/2019] [Indexed: 12/11/2022] Open
Abstract
Clear cell renal cell carcinoma (ccRCC) is the most common subtype of renal cell cancer, characterized by the highest mortality rate among other RCC subtypes due to the occurrence of metastasis and drug resistance following surgery. The Von Hippel-Lindau tumor suppressor (VHL)-hypoxia-inducible factor 1 subunit α (HIF1A)/hypoxia-inducible factor 2α (HIF2A)-vascular endothelial growth factor A (VEGFA) protein axis is involved in the development and progression of ccRCC, whereas sunitinib, a tyrosine kinase inhibitor, blocks the binding of VEGFA to its receptor. The aim of the present study was to examine the possible association of the gene expression of VHL, HIF1A, HIF2A, VEGFA and tumor protein P53 (P53) in cancer tissue with the outcome of ccRCC patients who were treated with sunitinib as first-line therapy following nephrec-tomy. A total of 36 ccRCC patients were enrolled, 11 of whom were administered sunitinib post-operatively. Tumor and control samples were collected, and mRNA and protein levels were assessed by reverse transcription-quantitative polymerase chain reaction and western blot analysis, respectively. High mRNA and protein expression levels of HIF2A and VEGFA were found to be associated with shorter overall survival (OS) and progression-free survival (PFS) rates, as well as with unfavorable risk factors of cancer recurrence and mortality. Resistance to sunitinib was also observed; the OS and PFS rates were shorter (median OS and PFS: 12 and 6 months, respectively, vs. undetermined). Sunitinib resistance was associated with high HIF2A and VEGFA protein levels (b=0.57 and b=0.69 for OS and PFS, respectively; P<0.001). Taken together, the findings of this study suggest that the protein levels of HIF2A and VEGFA in tumor tissue may serve as independent prognostic factors in ccRCC. ccRCC patients with increased intratumoral HIF2A and VEGFA protein levels, and unaltered VHL protein levels, are not likely to benefit from sunitinib treatment following nephrectomy; however, this hypothesis requires verification by large-scale replication studies.
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Affiliation(s)
- Piotr M Wierzbicki
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, 80211 Gdansk, Poland
| | - Jakub Klacz
- Department of Urology, Faculty of Medicine, Medical University of Gdansk, 80402 Gdansk, Poland
| | - Anna Kotulak-Chrzaszcz
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, 80211 Gdansk, Poland
| | - Agata Wronska
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, 80211 Gdansk, Poland
| | - Marcin Stanislawowski
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, 80211 Gdansk, Poland
| | - Agnieszka Rybarczyk
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, 80211 Gdansk, Poland
| | | | - Zbigniew Kmiec
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, 80211 Gdansk, Poland
| | - Marcin Matuszewski
- Department of Urology, Faculty of Medicine, Medical University of Gdansk, 80402 Gdansk, Poland
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Cierpka-Kmiec K, Wronska A, Kmiec Z. In vitro generation of pancreatic β-cells for diabetes treatment. I. β-like cells derived from human pluripotent stem cells. Folia Histochem Cytobiol 2019; 57:1-14. [PMID: 30869153 DOI: 10.5603/fhc.a2019.0001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 02/06/2019] [Indexed: 11/25/2022] Open
Abstract
Diabetes mellitus is a chronic disease that affects hundreds of millions of people worldwide. Type 1 diabetes (T1D) is characterized by the lack of pancreatic β-cells that had been destroyed as a result of an autoimmune response. Therefore, in patients with T1D, the replacement therapy with functional β-cells derived from extrinsic sources could be a preferable option as compared to insulin treatment. Unfortunately, successful transplantation of whole pancreata or pancreatic islets into patients with diabetes is available only to a fraction of them due to the scarcity of donors. The rapid development of cell reprogramming methods made it possible to generate large numbers of human β-like cells derived from human embryonic stem cells (hESCs) or human induced pluripotent stem cells (hiPSCs). This review describes the basis of in vitro differentiaton protocols of β-like cells that mimic changes of the main signaling pathways during the key stages of human and murine pancreas development, which are described first. During the last 15 years it was found that there are no important differences between hESCs and hiPSCs in their differentiation capacities into β-like cells and the expression profiles of the key transcription factors. The in vitro produced β-like cells are immature as demonstrated by functional tests in rodents and single-cell transcriptomic and proteomic analyses. After the transplantation of the β cell progenitors into immunocompromised diabetic mice, a few weeks have to pass before the increased insulin levels in response to glucose load appear. There is a continuous progress in the development of open-type encapsulation devices which allow the vascularization of the transplanted cells and protect them against host's immune cells. The results of the first clinical trial of human partially differentiated endocrine progenitors of β cells transplanted into patients with T1D will be published in the year 2019. It is hoped that further improvements in the techniques of large-scale generation of the β-like cells derived from human pluripotent stem cells will bring us closer to their clinical application as a form of cause-directed therapy for people with diabetes.
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Affiliation(s)
- Katarzyna Cierpka-Kmiec
- Department of Hypertension and Diabetology, Medical University of Gdansk, Poland, Gdańsk, Poland
| | - Agata Wronska
- Department of Histology, Medical University of Gdansk, Poland
| | - Zbigniew Kmiec
- Department of Histology, Medical University of Gdansk, Poland.
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Zubrzycki A, Cierpka-Kmiec K, Kmiec Z, Wronska A. The role of low-calorie diets and intermittent fasting in the treatment of obesity and type-2 diabetes. J Physiol Pharmacol 2019; 69. [PMID: 30683819 DOI: 10.26402/jpp.2018.5.02] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 10/30/2018] [Indexed: 11/03/2022]
Abstract
Obesity is a condition associated with an increased risk of metabolic disorders, and in particular of type-2 diabetes (T2D). The treatment and prevention of obesity and associated metabolic disorders present great medical challenges. A major therapeutic goal in T2D is to control blood glucose levels, which can be achieved by pharmacological and nonpharmacological measures. The latter include increased physical activity and reduction of body fat mass by limiting dietary caloric content. Low-calorie diets (LCDs) involve a reduction in daily caloric intake by 25% to 30%. LCDs should be individualized depending on the patient's energy requirements, the severity of the obesity, and any accompanying diseases and treatments. Intermittent fasting (IF) involves caloric restriction for one or several days a week, or every day as the prolongation of the overnight fast. The results of recent clinical trials have shown that LCDs and intermittent fasting in patients with obesity (including those with coexisting T2D) can lead to a reduction in body fat mass and metabolic parameter improvements. These beneficial effects arise not only from the loss of body mass, but also from the activation of metabolic pathways specific to fasting conditions. However, the paucity of large-scale randomized controlled trials makes it difficult to prescribe LCDs or IF as reliable, routine methods for successful and stable weight loss.
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Affiliation(s)
- A Zubrzycki
- Department of Histology, Medical University of Gdansk, Gdansk, Poland
| | - K Cierpka-Kmiec
- Department of Hypertension and Diabetology, Medical University of Gdansk, Gdansk, Poland
| | - Z Kmiec
- Department of Histology, Medical University of Gdansk, Gdansk, Poland
| | - A Wronska
- Department of Histology, Medical University of Gdansk, Gdansk, Poland.
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Rybarczyk A, Klacz J, Wronska A, Matuszewski M, Kmiec Z, Wierzbicki PM. Overexpression of the YAP1 oncogene in clear cell renal cell carcinoma is associated with poor outcome. Oncol Rep 2017; 38:427-439. [DOI: 10.3892/or.2017.5642] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 04/27/2017] [Indexed: 11/05/2022] Open
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Kotulak A, Wronska A, Kobiela J, Godlewski J, Stanislawowski M, Wierzbicki P. Decreased expression of p73 in colorectal cancer. Folia Histochem Cytobiol 2016; 54:166-170. [DOI: 10.5603/fhc.a2016.0018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 08/17/2016] [Accepted: 08/17/2016] [Indexed: 11/25/2022] Open
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Wronska A, Lawniczak A, Wierzbicki PM, Kmiec Z. Age-Related Changes in Sirtuin 7 Expression in Calorie-Restricted and Refed Rats. Gerontology 2015; 62:304-10. [DOI: 10.1159/000441603] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 10/10/2015] [Indexed: 11/19/2022] Open
Abstract
Background: Sirtuins (SIRT1-7) have been implicated to mediate the beneficial effects of calorie restriction for healthy aging. While the physiological functions of SIRT7 are still poorly understood, SIRT7 has recently been shown to affect ribosome biogenesis, mitochondrial gene expression, and hepatic lipid metabolism. Objective: To analyze the effects of age and short-term calorie restriction (SCR) and subsequent refeeding on SIRT7 expression in key metabolic tissues. Methods: Four- and 24-month-old male Wistar rats were subjected to 40% SCR for 30 days, followed by ad libitum feeding for 2 or 4 days. Liver, white adipose tissue (WAT), heart and skeletal muscle samples were analyzed by real-time PCR and Western blotting for SIRT7 mRNA and protein expression, respectively. Results: Aging had diverse effects on SIRT7 levels in lipogenic tissues: both the mRNA and protein levels increased in the retroperitoneal depot (rWAT), did not change in the epididymal depot (eWAT), and decreased in the subcutaneous depot (sWAT) and the liver of old as compared to young animals. In the heart, extensor digitorum longus muscle (EDL) and soleus muscle (SOL), Sirt7 gene but not protein expression was lower in old than in young control rats. SCR did not affect SIRT7 expression in WAT and the liver in both age groups. In the heart of young animals, SCR did not affect SIRT7 mRNA or protein level. In EDL, SIRT7 protein but not mRNA levels decreased after SCR and remained reduced upon refeeding. In SOL, both SIRT7 mRNA and protein expression were inhibited by refeeding. In old rats, cardiac Sirt7 expression increased after SCR and refeeding. In old rats' EDL and SOL muscles, SIRT7 protein expression was inhibited by refeeding. Conclusion: Age-related changes of SIRT7 gene expression in key organs of energy homeostasis are tissue dependent.
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Klacz J, Wierzbicki PM, Wronska A, Rybarczyk A, Stanislawowski M, Slebioda T, Olejniczak A, Matuszewski M, Kmiec Z. Decreased expression of RASSF1A tumor suppressor gene is associated with worse prognosis in clear cell renal cell carcinoma. Int J Oncol 2015; 48:55-66. [PMID: 26648328 PMCID: PMC4734610 DOI: 10.3892/ijo.2015.3251] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 10/09/2015] [Indexed: 12/27/2022] Open
Abstract
Clear-cell renal cell carcinoma (ccRCC) is the most common subtype of RCC (70-80%) and is associated with poor prognosis in 40% of cases mainly due to metastasis in the course of the disease. RASSF1, with its isoforms RASSF1A and RASSF1C, is a tumor suppressor gene which has not been fully analyzed in ccRCC yet. The epigenetic downregulation of RASSF1A is commonly associated with promoter hypermethylation. The aim of the present study was to compare the ccRCC outcomes with the expression of RASSF1A and RASSF1C. Tissues were obtained from 86 ccRCC patients. RASSF1A and RASSF1C mRNA levels were assessed in tumor and matched normal kidney tissue, and in 12 samples of local metastases by quantitative PCR (qPCR). RASSF1A and RASSF1C proteins levels were semi-quantified in 58 samples by western blot analysis and their tissue localization was assessed by immunohistochemistry. Hypermethylation of RASSF1A promoter was measured by high-resolution-melting methylation-specific qPCR. RASSF1A mRNA levels were 4 and 5 times lower in 66% of tumor and 75% metastasized samples. RASSF1A hypermethylation was found in 40% of analyzed T cases. RASSF1A protein expression was 5 or 20 times decreased in 70% tumor and 75% metastatic samples, respectively. RASSF1A hypermethylation, mRNA and protein levels were associated with TNM progression and higher Fuhrman's grading. Decreased RASSF1A expression, hypermethylation, TNM and Fuhrman's grading were associated with poorer overall survival (OS). Cox hazard ratio (HR) analysis revealed predictor role of RASSF1A mRNA levels on OS and progression-free survival (PFS) in relation to Fuhrman's grading (OS HR=2.25, PFS HR=2.93). RASSF1C levels were increased in ccRCC; no correlations with clinicopathological variables were found. We conclude that RASSF1C gene is not involved in ccRCC progression and we propose that the measurements of RASSF1A mRNA levels in paired tumor-normal kidney tissue could serve as a new prognostic factor in ccRCC.
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Affiliation(s)
- Jakub Klacz
- Department of Urology, Faculty of Medicine, Medical University of Gdansk, Gdansk 80-211, Poland
| | - Piotr M Wierzbicki
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, Gdansk 80-211, Poland
| | - Agata Wronska
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, Gdansk 80-211, Poland
| | - Agnieszka Rybarczyk
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, Gdansk 80-211, Poland
| | - Marcin Stanislawowski
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, Gdansk 80-211, Poland
| | - Tomasz Slebioda
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, Gdansk 80-211, Poland
| | - Agata Olejniczak
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, Gdansk 80-211, Poland
| | - Marcin Matuszewski
- Department of Urology, Faculty of Medicine, Medical University of Gdansk, Gdansk 80-211, Poland
| | - Zbigniew Kmiec
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, Gdansk 80-211, Poland
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Wronska A, Lawniczak A, Wierzbicki PM, Goyke E, Sledzinski T, Kmiec Z. White Adipose Tissue Depot-Specific Activity of Lipogenic Enzymes in Response to Fasting and Refeeding in Young and Old Rats. Gerontology 2015; 61:448-55. [PMID: 25721559 DOI: 10.1159/000371578] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 12/16/2014] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Although the heterogeneity of white adipose tissue (WAT) in different anatomical sites is a well-known phenomenon, there are scarce data on aging-associated metabolic alterations in various WAT depots. OBJECTIVE We used the model of fasting and refeeding to analyze the effect of aging on the activity of key lipogenic enzymes in retroperitoneal (rWAT), epididymal (eWAT), and subcutaneous (sWAT) adipose tissue depots. METHODS 5- and 24-month-old male Wistar rats were fasted for 48 h or were fasted for 2 days and subsequently refed for 2 or 4 days. Control animals had ad libitum access to chow. Samples obtained from three WAT deposits were analyzed for the enzymatic activities of ATP citrate lyase (ACL), fatty acid synthase (FAS), and glucose-6-phosphate dehydrogenase (G6PD). Concentrations of lipids and proteins were measured in the blood serum. RESULTS Fasting for 2 days decreased the concentration of free fatty acids only in the young rats. The basal activities of ACL and FAS were lower in eWAT than in rWAT and sWAT of the young rats. In the young rats, fasting did not change ACL and FAS activities in any of the studied depots. Refeeding increased these activities more quickly in rWAT than in eWAT, while in sWAT no induction was observed. ACL and FAS activities were manifold lower in all WAT depots of the old than in those of the young rats. In the old animals fasting had no effect on ACL activity in any depot and decreased FAS activity only in sWAT. After 4 days of refeeding, FAS activity increased in rWAT and sWAT, but no change in ACL activity occurred. G6PD activity in the young rats was lower by 40% in eWAT than in rWAT. The induction of the enzyme by refeeding occurred faster in rWAT than in eWAT, while in sWAT no change in G6PD activity was observed. G6PD activity did not change with aging. Fasting of the old rats decreased G6PD activity in rWAT and sWAT. Refeeding failed to induce the enzyme in these depots, whereas in eWAT G6PD activity increased by 76% after 4 days of refeeding. CONCLUSION Fasting and refeeding revealed WAT depot-specific, age-related changes of the activities of lipogenic enzymes.
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Affiliation(s)
- Agata Wronska
- Department of Histology, Medical University of Gdansk, Gdansk, Poland
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Wronska A, Kurkowska-Jastrzebska I, Santulli G. Application of microRNAs in diagnosis and treatment of cardiovascular disease. Acta Physiol (Oxf) 2015; 213:60-83. [PMID: 25362848 DOI: 10.1111/apha.12416] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 10/08/2014] [Accepted: 10/24/2014] [Indexed: 12/13/2022]
Abstract
Cardiovascular disease (CVD) is a major cause of morbidity and mortality worldwide. Innovative, more stringent diagnostic and prognostic biomarkers and effective treatment options are needed to lessen its burden. In recent years, microRNAs have emerged as master regulators of gene expression - they bind to complementary sequences within the mRNAs of their target genes and inhibit their expression by either mRNA degradation or translational repression. microRNAs have been implicated in all major cellular processes, including cell cycle, differentiation and metabolism. Their unique mode of action, fine-tuning gene expression rather than turning genes on/off, and their ability to simultaneously regulate multiple elements of relevant pathways makes them enticing potential biomarkers and therapeutic targets. Indeed, cardiovascular patients have specific patterns of circulating microRNA levels, often early in the disease process. This article provides a systematic overview of the role of microRNAs in the pathophysiology, diagnosis and treatment of CVD.
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Affiliation(s)
- A. Wronska
- Helen and Clyde Wu Center for Molecular Cardiology; Department of Physiology and Cellular Biophysics; College of Physicians and Surgeons of Columbia University; New York NY USA
| | - I. Kurkowska-Jastrzebska
- Department of Experimental and Clinical Pharmacology; Medical University of Warsaw; Warsaw Poland
- 2nd Department of Neurology; National Institute of Psychiatry and Neurology; Warsaw Poland
| | - G. Santulli
- Helen and Clyde Wu Center for Molecular Cardiology; Department of Physiology and Cellular Biophysics; College of Physicians and Surgeons of Columbia University; New York NY USA
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Wierzbicki PM, Klacz J, Rybarczyk A, Slebioda T, Stanislawowski M, Wronska A, Kowalczyk A, Matuszewski M, Kmiec Z. Identification of a suitable qPCR reference gene in metastatic clear cell renal cell carcinoma. Tumour Biol 2014; 35:12473-87. [PMID: 25225161 PMCID: PMC4275580 DOI: 10.1007/s13277-014-2566-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 08/27/2014] [Indexed: 11/20/2022] Open
Abstract
There is no data on reference gene (RG) selection in metastatic clear-cell renal cell carcinoma (mccRCC) for quantitative PCR (qPCR) data normalization. We aimed at selecting the most stable RG for further determination of new prognostic markers. Thirty-five nonmetastatic and 35 mccRCC patients undergoing radical nephrectomy were included. Paired primary tumor (T, n = 70) and normal (C, n = 70) kidney fragments were collected; from 12 out of 35 mccRCC cases, we also collected metastasized regional lymph nodes and adrenal gland tissues (M, n = 12). After RNA extraction, reverse transcription and qPCR were performed. Samples were divided into four analyzed groups. Fifteen candidate RGs were tested by RefFinder tool and manual statistics. To present the importance of RG selection, TP53 gene expression levels in samples were normalized with the use of RG data. RPL13 gene was the most stable RG in analysis of 35 primary tumor nonmetastatic versus 35 mccRCC samples and matched metastasized T/C/M samples (n = 12, each group). GUSB was the most suitable RG in total 152 samples and in paired T and C (n = 140) kidney samples. Expression of GUSB, RPL13, and the RPL13 + RPLP0 pair were independent of clinical/sample variables. Normalization of TP53 expression levels showed variability of GAPDH and ACTB assays. GUSB or RPL13 assays should be used in mccRCC for qPCR data normalization whereas GAPDH and ACTB assays should be avoided. Prior RG studies should precede each qPCR gene expression study since RG selection is associated with the origin and proportion of specimens.
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Affiliation(s)
- Piotr M Wierzbicki
- Department of Histology, Faculty of Medicine, Medical University of Gdansk, ul. Dębinki 1, PL 80-211, Gdańsk, Poland,
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Wronska A, Sledzinski T, Goyke E, Lawniczak A, Wierzbicki P, Kmiec Z. Short-term calorie restriction and refeeding differently affect lipogenic enzymes in major white adipose tissue depots of young and old rats. J Physiol Pharmacol 2014; 65:117-126. [PMID: 24622836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 12/12/2013] [Indexed: 06/03/2023]
Abstract
The metabolic effects of short-term calorie restriction (SCR) and subsequent refeeding were compared in different white adipose tissue (WAT) depots of young (5-month old) and old (24-month) male Wistar rats. The animals were subjected to a 40% calorie restricted diet (i.e. 40% lower food supply than of control rats) for 30 days, and then re-fed for 0, 2, or 4 days. WAT samples from perirenal (pWAT), epididymal (eWAT), and subcutaneous (sWAT) depots were analysed for the enzymatic activities of ATP-citrate lyase (ACL), fatty acid synthase (FAS), and glucose-6-phosphate dehydrogenase (G6PD). The total WAT mass almost doubled in old rats, however, aging did not alter the relative proportions of the major regional fat depots. Serum leptin concentration was prominently higher in old rats, in which SCR resulted in less suppression of leptin level than in young animals, whereas refeeding increased leptin concentration in young, but not old, rats. In young rats refeeding elevated leptin gene expression only in pWAT, while in old rats the expression was induced first in eWAT, and later in pWAT. A prominent age-related decrease of ACL and FAS activities, but not of G6PD activity, was found in all the studied WAT depots. In young control rats, ACL activity was highest in pWAT, FAS activity was similar in all WAT depots, and G6PD activity was lowest in eWAT. In old rats, the enzymatic activities were lower in eWAT than in the other depots. The patterns of response to SCR and refeeding varied by age and WAT location. SCR stimulated ACL activity in pWAT but not in other depots of young rats, while FAS activity in pWAT and sWAT did not change in young and decreased in the old animals. Among the studied depots, pWAT was most responsive to refeeding in both age groups. In conclusion, SCR in old rats, as compared to the young, may be accompanied by reduced 'rebound effect' upon returning to unrestricted diet.
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Affiliation(s)
- A Wronska
- Department of Histology, Medical University of Gdansk, Gdansk, Poland.
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Wronska A, Kmiec Z. Structural and biochemical characteristics of various white adipose tissue depots. Acta Physiol (Oxf) 2012; 205:194-208. [PMID: 22226221 DOI: 10.1111/j.1748-1716.2012.02409.x] [Citation(s) in RCA: 240] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 09/29/2011] [Accepted: 01/02/2012] [Indexed: 12/11/2022]
Abstract
It is now widely accepted that white adipose tissue (WAT) is not merely a fuel storage organ, but also a key component of metabolic homoeostatic mechanisms. Apart from its major role in lipid and glucose metabolism, adipose tissue is also involved in a wide array of other biological processes. The hormones and adipokines, as well as other biologically active agents released from fat cells, affect many physiological and pathological processes. WAT is neither uniform nor inflexible because it undergoes constant remodelling, adapting the size and number of adipocytes to changes in nutrients' availability and hormonal milieu. Fat depots from different areas of the body display distinct structural and functional properties and have disparate roles in pathology. The two major types of WAT are visceral fat, localized within the abdominal cavity and mediastinum, and subcutaneous fat in the hypodermis. Visceral obesity correlates with increased risk of insulin resistance and cardiovascular diseases, while increase of subcutaneous fat is associated with favourable plasma lipid profiles. Visceral adipocytes show higher lipogenic and lipolytic activities and produce more pro-inflammatory cytokines, while subcutaneous adipocytes are the main source of leptin and adiponectin. Moreover, adipose tissue associated with skeletal muscles (intramyocellular and intermuscular fat) and with the epicardium is believed to provide fuels for skeletal and cardiac muscle contraction. However, increased mass of either epicardial or intermuscular adipose tissue correlates with cardiovascular risk, while the presence of the intramyocellular fat is a risk factor for the development of insulin resistance. This review summarizes results of mainly human studies related to the differential characteristics of various WAT depots.
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Affiliation(s)
- A. Wronska
- Department of Histology; Medical Faculty; Medical University of Gdansk; Gdansk; Poland
| | - Z. Kmiec
- Department of Histology; Medical Faculty; Medical University of Gdansk; Gdansk; Poland
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Seigel GM, Wagner J, Wronska A, Campbell L, Ju W, Zhong N. Progression of early postnatal retinal pathology in a mouse model of neuronal ceroid lipofuscinosis. Eye (Lond) 2006; 19:1306-12. [PMID: 15565184 DOI: 10.1038/sj.eye.6701770] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
PURPOSE Accumulation of autofluorescent storage material in the CNS is a hallmark of neuronal ceroid lipofuscinosis (NCL, Batten disease). Since the retina is generally the first CNS target affected in NCL and could serve as a means to assess early disease progression as well as potential therapeutic responses, we followed the course of postnatal retinal pathology in tissues from the CLN8 (mnd) mouse model of NCL. RESULTS Cytoplasmic inclusions in the retinal ganglion cell (RGC) layer were shown by periodic acid schiff stain by P7. TUNEL measurements of cell death became significant at P21 (P<0.001) with most cell death occurring in the photoreceptor layer. Significant autofluorescence and RGC hypertrophy were evident in mnd mice at P0, prior to eye opening or significant cell death. CONCLUSION An increased understanding of the timing, location, and characteristic retinal pathologies of Batten disease may lead to diagnostic and therapeutic advances in the clinical setting.
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Affiliation(s)
- G M Seigel
- Department of Ophthalmology, Ross Eye Institute, Physiology and Biophysics, University at Buffalo-SUNY, Buffalo, NY 14214, USA.
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Wegiel J, Wang KC, Imaki H, Rubenstein R, Wronska A, Osuchowski M, Lipinski WJ, Walker LC, LeVine H. The role of microglial cells and astrocytes in fibrillar plaque evolution in transgenic APP(SW) mice. Neurobiol Aging 2001; 22:49-61. [PMID: 11164276 DOI: 10.1016/s0197-4580(00)00181-0] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ultrastructural reconstruction of 27 fibrillar plaques in different stages of formation and maturation was undertaken to characterize the development of fibrillar plaques in the brains of human APP(SW) transgenic mice (Tg2576). The study suggests that microglial cells are not engaged in Abeta removal and plaque degradation, but in contrast, are a driving force in plaque formation and development. Fibrillar Abeta deposition at the amyloid pole of microglial cells appears to initiate three types of neuropil response: degeneration of neurons, protective activation of astrocytes, and attraction and activation of microglial cells sustaining plaque growth. Enlargement of neuronal processes and synapses with accumulation of degenerated mitochondria, dense bodies, and Hirano-type bodies is the marker of toxic injury of neurons by fibrillar Abeta. Separation of amyloid cores from neurons and degradation of amyloid cores by cytoplasmic processes of hypertrophic astrocytes suggest the protective and defensive character of astrocytic response to fibrillar Abeta. The growth of cored plaque from a small plaque with one microglial cell with an amyloid star and a few dystrophic neurites to a large plaque formed by several dozen microglial cells seen in old mice is the effect of attraction and activation of microglial cells residing outside of the plaque perimeter. This mechanism of growth of plaques appears to be characteristic of cored plaques in transgenic mice. Other features in mouse microglial cells that are absent in human brain are clusters of vacuoles, probably of lysosomal origin. They evolve into circular cisternae and finally into large vacuoles filled with osmiophilic, amorphous material and bundles of fibrils that are poorly labeled with antibody to Abeta. Microglial cells appear to release large amounts of fibrillar Abeta and accumulate traces of fibrillar Abeta in a lysosomal pathway.
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Affiliation(s)
- J Wegiel
- New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
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Czlonkowska A, Kurkowska-Jastrzebska I, Wronska A, Kohutnicka M, Czlonkowski A. Immune system involvement in toxic neurodegeneration following 1-methyl-4-phenyl-1,2,3,6-tetrahydropiridine (MPTP) treatment in mice. J Neuroimmunol 1998. [DOI: 10.1016/s0165-5728(98)91337-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Jaroszyński J, Wciórka J, Stanikowska I, Wronska A, Stepień E. [Results of complex hospital treatment of schizophrenic psychoses]. Psychiatr Pol 1983; 17:113-6. [PMID: 6635042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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