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de Amaral M, Von Dentz MC, Ressel Simões LA, Vogt É, Heiermann D, Fischer P, Colombo P, Kucharski LC. Metabolic changes in the subtropical frog Boana pulchella during experimental cooling and recovery conditions. J Therm Biol 2023; 117:103705. [PMID: 37714110 DOI: 10.1016/j.jtherbio.2023.103705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 02/01/2023] [Revised: 08/30/2023] [Accepted: 08/31/2023] [Indexed: 09/17/2023]
Abstract
Frogs have developed biochemical and physiological adaptations to occupy diverse ecological niches on Earth successfully. Survival in frozen states is a fascinating strategy made possible by evolving adaptations to produce cryoprotectant solutes. The hylid frog Boana pulchella thrives in South American regions with cold climates, remaining active while enduring sporadic subzero temperatures during winter. The species' metabolic changes during subzero exposure remain unclear. Therefore, we exposed B. pulchella to cooling and recovery, assessing plasma and tissue metabolite changes. Cooling significantly reduced urea concentrations in plasma (P = 0.033), muscle (P = 0.001), heart (P = 0.009), and brain (P = 0.041) compared to acclimation. Liver glucose oxidation and glycogen synthesis were lower in cooling and recovery than in acclimation (P < 0.0001 and P = 0.0117, respectively). Muscle glycogen synthesis was lower in recovery than acclimation (P = 0.0249). These results demonstrate B. pulchella's physiological strategies during subzero exposure, likely reflecting species-specific evolutionary adaptations for brief subzero exposures that enable winter survival in its natural habitat.
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Affiliation(s)
- Marjoriane de Amaral
- Laboratory of Metabolism and Comparative Endocrinology, Department of Physiology, Federal University of Rio Grande do Sul, Ramiro Barcelos 2600, 90035003, Porto Alegre, Rio Grande do Sul, Brazil.
| | - Maiza Cristina Von Dentz
- Laboratory of Metabolism and Comparative Endocrinology, Department of Physiology, Federal University of Rio Grande do Sul, Ramiro Barcelos 2600, 90035003, Porto Alegre, Rio Grande do Sul, Brazil
| | - Leonardo Airton Ressel Simões
- Laboratory of Metabolism and Comparative Endocrinology, Department of Physiology, Federal University of Rio Grande do Sul, Ramiro Barcelos 2600, 90035003, Porto Alegre, Rio Grande do Sul, Brazil
| | - Éverton Vogt
- Laboratory of Metabolism and Comparative Endocrinology, Department of Physiology, Federal University of Rio Grande do Sul, Ramiro Barcelos 2600, 90035003, Porto Alegre, Rio Grande do Sul, Brazil
| | - Dener Heiermann
- Museum of Natural Sciences of the Secretariat of Environment and Infrastructure of Rio Grande do Sul (SEMA), FZB, Department of Herpetology/Amphibians, Doutor Salvador França, 90690000, Porto Alegre, Rio Grande do Sul, Brazil
| | - Pedro Fischer
- Museum of Natural Sciences of the Secretariat of Environment and Infrastructure of Rio Grande do Sul (SEMA), FZB, Department of Herpetology/Amphibians, Doutor Salvador França, 90690000, Porto Alegre, Rio Grande do Sul, Brazil
| | - Patrick Colombo
- Museum of Natural Sciences of the Secretariat of Environment and Infrastructure of Rio Grande do Sul (SEMA), FZB, Department of Herpetology/Amphibians, Doutor Salvador França, 90690000, Porto Alegre, Rio Grande do Sul, Brazil
| | - Luiz Carlos Kucharski
- Laboratory of Metabolism and Comparative Endocrinology, Department of Physiology, Federal University of Rio Grande do Sul, Ramiro Barcelos 2600, 90035003, Porto Alegre, Rio Grande do Sul, Brazil
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Vogt ÉL, Von Dentz MC, Rocha DS, Model JFA, Kowalewski LS, Silveira D, de Amaral M, de Bittencourt Júnior PIH, Kucharski LC, Krause M, Vinagre AS. Acute effects of a single moderate-intensity exercise bout performed in fast or fed states on cell metabolism and signaling: Comparison between lean and obese rats. Life Sci 2023; 315:121357. [PMID: 36634864 DOI: 10.1016/j.lfs.2022.121357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 09/06/2022] [Revised: 12/15/2022] [Accepted: 12/28/2022] [Indexed: 01/11/2023]
Abstract
AIMS Although the benefits of exercise can be potentiated by fasting in healthy subjects, few studies evaluated the effects of this intervention on the metabolism of obese subjects. This study investigated the immediate effects of a single moderate-intensity exercise bout performed in fast or fed states on the metabolism of gastrocnemius and soleus of lean and obese rats. MAIN METHODS Male rats received a high-fat diet (HFD) for twelve weeks to induce obesity or were fed standard diet (SD). After this period, the animals were subdivided in groups: fed and rest (FER), fed and exercise (30 min treadmill, FEE), 8 h fasted and rest (FAR) and fasted and exercise (FAE). Muscle samples were used to investigate the oxidative capacity and gene expression of AMPK, PGC1α, SIRT1, HSF1 and HSP70. KEY FINDINGS In relation to lean animals, obese animals' gastrocnemius glycogen decreased 60 %, triglycerides increased 31 %; glucose and alanine oxidation decreased 26 % and 38 %, respectively; in soleus, triglycerides reduced 46 % and glucose oxidation decreased 37 %. Exercise and fasting induced different effects in glycolytic and oxidative muscles of obese rats. In soleus, fasting exercise spared glycogen and increased palmitate oxidation, while in gastrocnemius, glucose oxidation increased. In obese animals' gastrocnemius, AMPK expression decreased 29 % and SIRT1 increased 28 % in relation to lean. The AMPK response was more sensitive to exercise and fasting in lean than obese rats. SIGNIFICANCE Exercise and fasting induced different effects on the metabolism of glycolytic and oxidative muscles of obese rats that can promote health benefits in these animals.
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Affiliation(s)
- Éverton Lopes Vogt
- Comparative Endocrinology and Metabolism Laboratory (LAMEC), Department of Physiology, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Graduate Program in Biological Sciences: Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Maiza Cristina Von Dentz
- Comparative Endocrinology and Metabolism Laboratory (LAMEC), Department of Physiology, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Graduate Program in Biological Sciences: Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Débora Santos Rocha
- Comparative Endocrinology and Metabolism Laboratory (LAMEC), Department of Physiology, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Graduate Program in Biological Sciences: Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Jorge Felipe Argenta Model
- Comparative Endocrinology and Metabolism Laboratory (LAMEC), Department of Physiology, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Graduate Program in Biological Sciences: Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Lucas Stahlhöfer Kowalewski
- Laboratory of Inflammation, Metabolism and Exercise Research (LAPIMEX), Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil; Graduate Program in Biological Sciences: Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil; Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Diane Silveira
- Comparative Endocrinology and Metabolism Laboratory (LAMEC), Department of Physiology, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Graduate Program in Biological Sciences: Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Marjoriane de Amaral
- Comparative Endocrinology and Metabolism Laboratory (LAMEC), Department of Physiology, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Graduate Program in Biological Sciences: Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Paulo Ivo Homem de Bittencourt Júnior
- Laboratory of Inflammation, Metabolism and Exercise Research (LAPIMEX), Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil; Graduate Program in Biological Sciences: Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil; Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Luiz Carlos Kucharski
- Comparative Endocrinology and Metabolism Laboratory (LAMEC), Department of Physiology, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Graduate Program in Biological Sciences: Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Mauricio Krause
- Laboratory of Inflammation, Metabolism and Exercise Research (LAPIMEX), Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil; Graduate Program in Biological Sciences: Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil; Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Anapaula Sommer Vinagre
- Comparative Endocrinology and Metabolism Laboratory (LAMEC), Department of Physiology, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Graduate Program in Biological Sciences: Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.
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Pöppl ÁG, Valle SC, Mottin TS, Leal JS, González FHD, Kucharski LC, Da Silva RSM. Pyometra-associated insulin resistance assessment by insulin binding assay and tyrosine kinase activity evaluation in canine muscle tissue. Domest Anim Endocrinol 2021; 76:106626. [PMID: 33866106 DOI: 10.1016/j.domaniend.2021.106626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 03/03/2021] [Accepted: 03/16/2021] [Indexed: 11/18/2022]
Abstract
Diestrus is associated with insulin resistance in bitches and pyometra can further impair insulin sensitivity. This study aimed to compare insulin sensitivity, insulin binding, and tyrosine kinase activity in bitches in anestrus, diestrus, or with pyometra. Patients submitted to elective ovariohysterectomy were divided into anestrus (n = 11) or diestrus (n = 13) according to reproductive history, vaginal cytology, and uterine histology. The group pyometra (n = 8) included bitches diagnosed with the disease based on clinical presentation and abdominal ultrasound findings and further confirmed by uterine histopathology. All patients were submitted to an intravenous glucose tolerance test (IVGTT) before ovariohysterectomy, and rectus abdominis muscle samples were collected during surgery for plasmatic membrane suspension preparation. Muscle-membranes were submitted to cold saturation insulin binding assay for dissociation constant (Kd) and maximum binding capacity (Bmax) determination, as well as exogenous substrate Poly (Glu: Tyr 4:1) phosphorylation assay for basal tyrosine kinase evaluation. Bitches with pyometra showed higher basal insulin (P < 0.001) and higher area under the curve (AUC) for insulin (P = 0.01) and glucose (P < 0.001) response during the IVGTT in comparison with bitches in anestrus or diestrus. Diestrus (P < 0.0001) and pyometra (P = 0.001) were associated with reduced tyrosine kinase activity in comparison with anestrus. No differences were documented in Kd and Bmax results for the low-affinity/high-capacity insulin receptors; however, high-affinity/low-capacity insulin receptors showed higher Kd and Bmax results in bitches in diestrus or with pyometra (P < 0.05) in comparison with anestrus. Despite the pyometra group showed the highest Kd values (P < 0.01), its Bmax results did not differ from the diestrus group (P > 0.05). Diestrus' higher Kd values and reduced tyrosine kinase activity in muscle tissue were compensated by increased total insulin binding capacity. Absent differences in IVGTT results between diestrus and anestrus bitches corroborate this finding. However, in bitches with pyometra, the highest Kd values were not compensated by increased total insulin binding capacity. This finding was associated with insulin resistance and glucose intolerance in IVGTT results. Moreover, pyometra resolution restored insulin sensitivity and glucose tolerance. These features can play a key role in pyometra-associated CDM, as well as in diabetic remission after pyometra resolution.
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Affiliation(s)
- Á G Pöppl
- Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite 500, Porto Alegre - RS, Brazil. CEP: 90050-170; Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, Porto Alegre - RS, Brazil. CEP: 91540-000; Hospital de Clínicas Veterinárias, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, Porto Alegre - RS, Brazil. CEP: 91540-000.
| | - S C Valle
- Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite 500, Porto Alegre - RS, Brazil. CEP: 90050-170
| | - T S Mottin
- Hospital de Clínicas Veterinárias, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, Porto Alegre - RS, Brazil. CEP: 91540-000
| | - J S Leal
- Setor de Patologia Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, Porto Alegre - RS, Brazil. CEP: 91540-000
| | - F H D González
- Departamento de Patologia Clínica Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9090, Porto Alegre - RS, Brazil. CEP: 91540-000
| | - L C Kucharski
- Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite 500, Porto Alegre - RS, Brazil. CEP: 90050-170
| | - R S M Da Silva
- Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite 500, Porto Alegre - RS, Brazil. CEP: 90050-170
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Rocha DS, Kucharski LC. Is the beta estradiol receptor receiving enough attention for its metabolic importance in postmenopause? Horm Mol Biol Clin Investig 2021; 42:329-340. [PMID: 34704691 DOI: 10.1515/hmbci-2020-0079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/09/2020] [Accepted: 02/16/2021] [Indexed: 11/15/2022]
Abstract
The relationship between menopause and the development of metabolic diseases is well established. In postmenopause women, there is an expansion of visceral white adipose tissue (WATv), which highly contributes to the rise of circulating lipids. Meanwhile, muscle glucose uptake decreases and hepatic glucose production increases. Consequently, in the pancreas, lipotoxicity and glycotoxicity lead to deficient insulin production. These factors initiate an energy imbalance and enhance the probability of developing cardiovascular and metabolic diseases. Although the activation of estradiol receptors (ER) has been shown to be beneficial for the WAT stock pattern, leading to the insulin-sensitive phenotype, authors have described the risk of these receptors' activation, contributing to neoplasia development. The selective activation of beta-type ER (ERβ) seems to be a promising strategy in the treatment of energy imbalance, acting on several tissues of metabolic importance and allowing an intervention with less risk for the development of estrogen-dependent neoplasia. However, the literature on the risks and benefits of selective ERβ activation still needs to increase. In this review, several aspects related to ERβ were considered, such as its physiological role in tissues of energy importance, beneficial effects, and risks of its stimulation during menopause. PubMed, SciELO, Cochrane, and Medline/Bireme databases were used in this study.
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Affiliation(s)
- Débora Santos Rocha
- Physiology Department, Federal University of Rio Grande do Sul, Sarmento Leite, 500, 90050-170 Porto Alegre, Rio Grande do Sul, Brazil
| | - Luiz Carlos Kucharski
- Physiology Department, Federal University of Rio Grande do Sul, Sarmento Leite, 500, 90050-170 Porto Alegre, Rio Grande do Sul, Brazil
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Odorcyk FK, Duran-Carabali LE, Rocha DS, Sanches EF, Martini AP, Venturin GT, Greggio S, da Costa JC, Kucharski LC, Zimmer ER, Netto CA. Differential glucose and beta-hydroxybutyrate metabolism confers an intrinsic neuroprotection to the immature brain in a rat model of neonatal hypoxia ischemia. Exp Neurol 2020; 330:113317. [PMID: 32304750 DOI: 10.1016/j.expneurol.2020.113317] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 02/05/2020] [Revised: 04/08/2020] [Accepted: 04/14/2020] [Indexed: 12/12/2022]
Abstract
Neonatal hypoxia ischemia (HI) is the main cause of newborn mortality and morbidity. Preclinical studies have shown that the immature rat brain is more resilient to HI injury, suggesting innate mechanisms of neuroprotection. During neonatal period brain metabolism experience changes that might greatly affect the outcome of HI injury. Therefore, the aim of the present study was to investigate how changes in brain metabolism interfere with HI outcome in different stages of CNS development. For this purpose, animals were divided into 6 groups: HIP3, HIP7 and HIP11 (HI performed at postnatal days 3, 7 and 11, respectively), and their respective shams. In vivo [18F]FDG micro positron emission tomography (microPET) imaging was performed 24 and 72 h after HI, as well as ex-vivo assessments of glucose and beta-hydroxybutyrate (BHB) oxidation. At adulthood behavioral tests and histology were performed. Behavioral and histological analysis showed greater impairments in HIP11 animals, while HIP3 rats were not affected. Changes in [18F]FDG metabolism were found only in the lesion area of HIP11, where a substantial hypometabolism was detected. Furthermore, [18F]FDG hypometabolism predicted impaired cognition and worst histological outcomes at adulthood. Finally, substrate oxidation assessments showed that glucose oxidation remained unaltered and higher level of BHB oxidation found in P3 animals, suggesting a more resilient metabolism. Overall, present results show [18F]FDG microPET predicts long-term injury outcome and suggests that higher BHB utilization is one of the mechanisms that confer the intrinsic neuroprotection to the immature brain and should be explored as a therapeutic target for treatment of HI.
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Affiliation(s)
- F K Odorcyk
- Graduate Program in Phisiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil.
| | - L E Duran-Carabali
- Graduate Program in Phisiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - D S Rocha
- Graduate Program in Phisiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - E F Sanches
- Graduate Program in Biochemistry, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - A P Martini
- Graduate Program in Neuroscience, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - G T Venturin
- Preclinical Research Center, Brain Institute (BraIns) of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - S Greggio
- Preclinical Research Center, Brain Institute (BraIns) of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - J C da Costa
- Preclinical Research Center, Brain Institute (BraIns) of Rio Grande do Sul, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Porto Alegre, Brazil
| | - L C Kucharski
- Graduate Program in Phisiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - E R Zimmer
- Graduate Program in Biochemistry, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Graduate Program in Pharmacology and therapeutics, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Department of Pharmacology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - C A Netto
- Graduate Program in Phisiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Graduate Program in Neuroscience, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Graduate Program in Biochemistry, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil; Department of Biochemistry, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
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Fernandes FA, Dutra BK, Mosele F, Araujo ASR, Ferreira GD, Belló-Klein A, Kucharski LC, Vinagre AS, Da Silva RSM. Redox and metabolic strategies developed by anterior and posterior gills of the crab Neohelice granulata after short periods of hypo- or hyper-osmotic stress. Sci Total Environ 2018; 639:457-464. [PMID: 29800839 DOI: 10.1016/j.scitotenv.2018.05.162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/11/2018] [Accepted: 05/13/2018] [Indexed: 06/08/2023]
Abstract
The aim of this study was to identify the response pattern of redox balance, Na+/K+ATPase activity and HSP70 expression in the posterior and anterior gills of the crab Neohelice granulata submitted to hypo- or hyper-osmotic stress for 1 h and 6 h. After 1 h of either type of osmotic stress, there was an increase in catalase activity, but a decrease in GSSG/GSH ratio (oxidized to reduced glutathione ratio) and Na+/K+ATPase activity in both gill sets. H2O2 levels decreased only in the posterior gills. H2O2 levels and Na+/K+ATPase activity remained reduced after 6 h of exposure to either type of osmotic stress in both gill sets. The GSSG/GSH ratio returned to initial levels after 6 h of hyper-osmotic stress, whereas it increased 10 times in both gill sets after hypo-osmotic stress. Furthermore, HSP70 protein expression increased in posterior gills after 6 h of hypo-osmotic stress. H2O2 levels in tank water decreased after hypo-osmotic challenge and increased after 6 h of hyper-osmotic stress, indicating increased H2O2 excretion. Therefore, N. granulata gills have redox, metabolic and molecular strategies to deal with rapid osmotic challenges, an important environmental parameter that influences juvenile and adult crab distribution and abundance within different populations.
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Affiliation(s)
- F A Fernandes
- Laboratório de Metabolismo e Endocrinologia Comparada (LAMEC), Departamento de Fisiologia, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Brazil; Laboratório de Ictiologia, Instituto Federal de Educação, Ciência e Tecnologia Farroupilha - Campus São Vicente do Sul (IFFAR), Brazil
| | - B K Dutra
- Laboratório de Ictiologia, Instituto Federal de Educação, Ciência e Tecnologia Farroupilha - Campus São Vicente do Sul (IFFAR), Brazil
| | - F Mosele
- Laboratório de Fisiologia Cardiovascular, Departamento de Fisiologia, ICBS, UFRGS, Brazil
| | - A S R Araujo
- Laboratório de Fisiologia Cardiovascular, Departamento de Fisiologia, ICBS, UFRGS, Brazil
| | - G D Ferreira
- Departamento de Fisiologia, Federal University of Pelotas (UFPEL), Brazil
| | - A Belló-Klein
- Laboratório de Fisiologia Cardiovascular, Departamento de Fisiologia, ICBS, UFRGS, Brazil
| | - L C Kucharski
- Laboratório de Metabolismo e Endocrinologia Comparada (LAMEC), Departamento de Fisiologia, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Brazil
| | - A S Vinagre
- Laboratório de Metabolismo e Endocrinologia Comparada (LAMEC), Departamento de Fisiologia, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Brazil.
| | - R S M Da Silva
- Laboratório de Metabolismo e Endocrinologia Comparada (LAMEC), Departamento de Fisiologia, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Brazil
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Hoefel AL, Arbo BD, Vieira-Marques C, Cecconello AL, Cozer AG, Ribeiro MFM, Kucharski LC. Female rats are more susceptible to metabolic effects of dehydroepiandrosterone treatment. Can J Physiol Pharmacol 2018; 96:1069-1075. [PMID: 30011383 DOI: 10.1139/cjpp-2018-0159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Dehydroepiandrosterone (DHEA) is a steroid hormone that presents several effects on metabolism; however, most of the studies have been performed on male animals, while few authors have investigated possible sex differences regarding the metabolic effects of DHEA. Therefore, the aim of this study was to evaluate the effect of different doses of DHEA on metabolic parameters of male and ovariectomized female Wistar rats. Sex differences were found in the metabolism of distinct substrates and in relation to the effect of DHEA. In respect to the glucose metabolism in the liver, the conversion of glucose to CO2 and the synthesis of lipids from glucose were 53% and 33% higher, respectively, in males. Also, DHEA decreased hepatic lipogenesis only in females. Regarding the hepatic glycogen synthesis pathway, females presented 73% higher synthesis than males, and the effect of DHEA was observed only in females, where it decreased this parameter. In the adipose tissue, glucose uptake was 208% higher in females and DHEA decreased this parameter. In the muscle, glucose uptake was 168% higher in females and no DHEA effect was observed. In summary, males and females present a different metabolic profile, with females being more susceptible to the metabolic effects of DHEA.
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Affiliation(s)
- Ana Lúcia Hoefel
- a Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil.,b Laboratório de Interação Neuro-humoral, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Bruno Dutra Arbo
- c Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Rio Grande, Rio Grande do Sul, Brazil
| | - Claudia Vieira-Marques
- a Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil.,b Laboratório de Interação Neuro-humoral, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Ana Lúcia Cecconello
- b Laboratório de Interação Neuro-humoral, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Aline Gonçalves Cozer
- a Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Maria Flávia Marques Ribeiro
- b Laboratório de Interação Neuro-humoral, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Luiz Carlos Kucharski
- a Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
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8
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Trapp M, Valle SC, Pöppl AG, Chittó ALF, Kucharski LC, Da Silva RSM. Insulin-like receptors and carbohydrate metabolism in gills of the euryhaline crab Neohelice granulata: Effects of osmotic stress. Gen Comp Endocrinol 2018; 262:81-89. [PMID: 29548758 DOI: 10.1016/j.ygcen.2018.03.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 03/11/2018] [Accepted: 03/12/2018] [Indexed: 11/16/2022]
Abstract
The present study determined the effect of osmotic stress on the insulin-like receptor binding characteristics and on glucose metabolism in the anterior (AG) and posterior (PG) gills of the crab Neohelice granulata. Bovine insulin increased the capacity of the PG cell membrane to phosphorylate exogenous substrate poly (Glu:Tyr 4:1) and the glucose uptake in the control crab group. The crabs were submitted to three periods of hyperosmotic (HR) and hyposmotic (HO) stress, for 24, 72 and 144 h, to investigate the insulin-like receptor phosphorylation capacity of gills. Acclimation to HO for 24 h or HR for 144 h of stress inhibited the effects of insulin in the PG, decreasing the capacity of insulin to phosphorylate exogenous substrate poly (Glu:Tyr 4:1) and decreasing the glucose uptake. Hyperosmotic stress for the same period of 144 h significantly affected 125I-insulin binding in the AG and PG. However, HO stress for 24 h significantly reduced 125I-insulin-specific uptake only in the PG. Therefore, osmotic stress induces alterations in the gill insulin-like receptors that decrease insulin binding in the PG. These findings indicate that osmotic stress induced a pattern of insulin resistance in the PG. The free-glucose concentration in the PG decreased during acclimation to 144 h of HR stress and 24 h of HO stress. This decrease in the cell free-glucose concentration was not accompanied by a significant change in hemolymph glucose levels. In AG from the control group, neither the capacity of bovine insulin to phosphorylate exogenous substrate poly (Glu:Tyr 4:1) nor the glucose uptake changed; however, genistein decreased tyrosine-kinase activity, confirming that this receptor belongs to the tyrosine-kinase family. Acclimation to HO (24 h) or HR (144 h) stress decreased tyrosine-kinase activity in the AG. This study provided new information on the mechanisms involved in the osmoregulation process in crustaceans, demonstrating for the first time in an estuarine crab that osmotic challenge inhibited insulin-like signaling and the effect of insulin on glucose uptake in the PG.
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Affiliation(s)
- Márcia Trapp
- Laboratório de Metabolismo e Endocrinologia Comparada, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul. Rua Sarmento Leite, 500, ICBS - Campus Centro, Porto Alegre CEP 90050-170, RS, Brazil.
| | - Sandra Costa Valle
- Laboratório de Metabolismo e Endocrinologia Comparada, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul. Rua Sarmento Leite, 500, ICBS - Campus Centro, Porto Alegre CEP 90050-170, RS, Brazil; Faculdade de Nutrição, Universidade Federal de Pelotas, Rua Gomes Carneiro, 1, Pelotas CEP 96010-610, RS, Brazil
| | - Alan Gomes Pöppl
- Laboratório de Metabolismo e Endocrinologia Comparada, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul. Rua Sarmento Leite, 500, ICBS - Campus Centro, Porto Alegre CEP 90050-170, RS, Brazil; Setor de Clínica de Pequenos Animais, Hospital de Clínicas Veterinárias, Departamento de Medicina Animal, Faculdade de Veterinária, Universidade Federal do Rio Grande do Sul (UFRGS), Avenida Bento Gonçalves 9090, Agronomia, Porto Alegre CEP 91540-000, RS, Brazil
| | - Ana Lúcia Fernandes Chittó
- Laboratório de Metabolismo e Endocrinologia Comparada, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul. Rua Sarmento Leite, 500, ICBS - Campus Centro, Porto Alegre CEP 90050-170, RS, Brazil; Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga, 6681 Partenon, Porto Alegre CEP 90619-900, RS, Brazil
| | - Luiz Carlos Kucharski
- Laboratório de Metabolismo e Endocrinologia Comparada, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul. Rua Sarmento Leite, 500, ICBS - Campus Centro, Porto Alegre CEP 90050-170, RS, Brazil
| | - Roselis Silveira Martins Da Silva
- Laboratório de Metabolismo e Endocrinologia Comparada, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul. Rua Sarmento Leite, 500, ICBS - Campus Centro, Porto Alegre CEP 90050-170, RS, Brazil
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9
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Gomez R, Caletti G, Arbo BD, Hoefel AL, Schneider R, Hansen AW, Pulcinelli RR, Freese L, Bandiera S, Kucharski LC, Barros HMT. Acute intraperitoneal administration of taurine decreases the glycemia and reduces food intake in type 1 diabetic rats. Biomed Pharmacother 2018; 103:1028-1034. [PMID: 29710660 DOI: 10.1016/j.biopha.2018.04.131] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 02/28/2018] [Revised: 04/17/2018] [Accepted: 04/17/2018] [Indexed: 10/17/2022] Open
Abstract
Taurine, an amino acid with antioxidant and osmoregulatory properties, has been studied for its possible antidiabetic properties in type 1 and type 2 diabetic animals. In type 2 diabetic mice, taurine decreases blood glucose through increased insulin secretion and insulin receptor sensitization. However, insulin is absent in type 1 diabetic individuals. The aim of this study was to evaluate the effects of taurine on parameters related to the energy balance that could explain the metabolic action of this amino acid in type 1 diabetic rats. Control and streptozotocin-induced diabetic rats received saline or taurine (100 mg/kg/day), intraperitoneally, for 30 days. Parameters such as palatable food intake, gastrointestinal transit rate, serum glucose, insulin, leptin, and glucagon levels were measured 60 min after the last taurine administration. Liver, kidneys, heart, and retroperitoneal fat were dissected and weighted. Glycogen levels were measured in the liver and soleus muscle. Our results showed that acute taurine administration decreased glycemia. It also decreased food intake in diabetic rats, without affecting other metabolic parameters. Altogether, our results suggest that in type 1 diabetic rats, taurine decreases blood glucose by a non-insulin-dependent mechanism. Due to the safety profile of taurine, and its effect on glycemia, this amino acid may help to design new drugs to add benefit to insulin therapy in type 1 diabetic individuals.
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Affiliation(s)
- Rosane Gomez
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil; Programa de Pós-Graduação em Neurociências, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil.
| | - Greice Caletti
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil; Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil
| | - Bruno Dutra Arbo
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande (FURG), Brazil
| | - Ana Lúcia Hoefel
- Programa de Pós-Graduação em Fisiologia, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Ricardo Schneider
- Programa de Pós-Graduação em Neurociências, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Alana Witt Hansen
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Rianne Remus Pulcinelli
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Luana Freese
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil
| | - Solange Bandiera
- Programa de Pós-Graduação em Farmacologia e Terapêutica, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Luiz Carlos Kucharski
- Programa de Pós-Graduação em Fisiologia, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Helena Maria Tanhauser Barros
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFSCPA), Brazil
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10
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Pöppl ÁG, Lasta CS, González FHD, Kucharski LC, Silva RSMD. Índices de sensibilidade à insulina em fêmeas caninas: efeito do ciclo estral e da piometra. ACTA SCI VET 2018. [DOI: 10.22456/1679-9216.16395] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Marqueze A, Garbino CF, Trapp M, Kucharski LC, Fagundes M, Ferreira D, Koakoski G, Rosa JGS. Protein and lipid metabolism adjustments in silver catfish (Rhamdia quelen) during different periods of fasting and refeeding. BRAZ J BIOL 2017; 78:464-471. [PMID: 29091116 DOI: 10.1590/1519-6984.169333] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Accepted: 02/21/2017] [Indexed: 11/21/2022] Open
Abstract
The fish may experience periods of food deprivation or starvation which produce metabolic changes. In this study, adult Rhamdia quelen males were subjected to fasting periods of 1, 7, 14, and 21 days and of refeeding 2, 4, 6, and 12 days. The results demonstrated that liver protein was depleted after 1 day of fasting, but recovered after 6 days of refeeding. After 14 days of fasting, mobilization in the lipids of the muscular tissue took place, and these reserves began to re-establish themselves after 4 days of refeeding. Plasmatic triglycerides increased after 1 day of fasting, and decreased following 2 days of refeeding. The glycerol in the plasma oscillated constantly during the different periods of fasting and refeeding. Changes in the metabolism of both protein and lipids during these periods can be considered as survival strategies used by R. quelen. The difference in the metabolic profile of the tissues, the influence of the period of fasting, and the type of reserves mobilized were all in evidence.
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Affiliation(s)
- A Marqueze
- Mestrado de Avaliação em Impactos Ambientais, Centro Universitário Lassalle - Unilasalle, Av. Victor Barreto, 2288, CEP 92010-000, Canoas, RS, Brazil
| | - C F Garbino
- Mestrado de Avaliação em Impactos Ambientais, Centro Universitário Lassalle - Unilasalle, Av. Victor Barreto, 2288, CEP 92010-000, Canoas, RS, Brazil
| | - M Trapp
- Departamento de Fisiologia, Universidade Federal do Rio Grande do Sul - UFRGS, Rua Sarmento Leite, 500, CEP 90050-170, Porto Alegre, RS, Brazil
| | - L C Kucharski
- Departamento de Fisiologia, Universidade Federal do Rio Grande do Sul - UFRGS, Rua Sarmento Leite, 500, CEP 90050-170, Porto Alegre, RS, Brazil
| | - M Fagundes
- Curso de Medicina Veterinária, Universidade de Passo Fundo - UPF, Campus I, São José, CP 611, CEP 99001-970, Passo Fundo, RS, Brazil
| | - D Ferreira
- Curso de Medicina Veterinária, Universidade de Passo Fundo - UPF, Campus I, São José, CP 611, CEP 99001-970, Passo Fundo, RS, Brazil
| | - G Koakoski
- Programa de Pós-graduação em Farmacologia, Universidade Federal de Santa Maria - UFSM, Avenida Roraima, 1000, Cidade Universitária, Camobi, CEP 97105-900, Santa Maria, RS, Brazil
| | - J G S Rosa
- Programa de Pós-graduação em Farmacologia, Universidade Federal de Santa Maria - UFSM, Avenida Roraima, 1000, Cidade Universitária, Camobi, CEP 97105-900, Santa Maria, RS, Brazil
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12
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Cozer AG, Trapp M, Martins TL, De Fraga LS, Vieira Marques C, Model JFA, Schein V, Kucharski LC, Da Silva RS. Effects of Stanniocalcin-1 on glucose flux in rat brown adipose tissue. Biochimie 2017; 138:50-55. [DOI: 10.1016/j.biochi.2017.04.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 04/18/2017] [Indexed: 11/26/2022]
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13
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Vieira-Marques C, Arbo BD, Cozer AG, Hoefel AL, Cecconello AL, Zanini P, Niches G, Kucharski LC, Ribeiro MFM. Sex-specific effects of dehydroepiandrosterone (DHEA) on glucose metabolism in the CNS. J Steroid Biochem Mol Biol 2017; 171:1-10. [PMID: 27871979 DOI: 10.1016/j.jsbmb.2016.11.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 12/22/2022]
Abstract
DHEA is a neuroactive steroid, due to its modulatory actions on the central nervous system (CNS). DHEA is able to regulate neurogenesis, neurotransmitter receptors and neuronal excitability, function, survival and metabolism. The levels of DHEA decrease gradually with advancing age, and this decline has been associated with age related neuronal dysfunction and degeneration, suggesting a neuroprotective effect of endogenous DHEA. There are significant sex differences in the pathophysiology, epidemiology and clinical manifestations of many neurological diseases. The aim of this study was to determine whether DHEA can alter glucose metabolism in different structures of the CNS from male and female rats, and if this effect is sex-specific. The results showed that DHEA decreased glucose uptake in some structures (cerebral cortex and olfactory bulb) in males, but did not affect glucose uptake in females. When compared, glucose uptake in males was higher than females. DHEA enhanced the glucose oxidation in both males (cerebral cortex, olfactory bulb, hippocampus and hypothalamus) and females (cerebral cortex and olfactory bulb), in a sex-dependent manner. In males, DHEA did not affect synthesis of glycogen, however, glycogen content was increased in the cerebral cortex and olfactory bulb. DHEA modulates glucose metabolism in a tissue-, dose- and sex-dependent manner to increase glucose oxidation, which could explain the previously described neuroprotective role of this hormone in some neurodegenerative diseases.
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Affiliation(s)
- Claudia Vieira-Marques
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170, Porto Alegre/RS, Brazil; Laboratório de Metabolismo e Endocrinologia Comparada, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170, Porto Alegre/RS, Brazil.
| | - Bruno Dutra Arbo
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170, Porto Alegre/RS, Brazil
| | - Aline Gonçalves Cozer
- Laboratório de Metabolismo e Endocrinologia Comparada, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170, Porto Alegre/RS, Brazil
| | - Ana Lúcia Hoefel
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170, Porto Alegre/RS, Brazil; Laboratório de Metabolismo e Endocrinologia Comparada, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170, Porto Alegre/RS, Brazil
| | - Ana Lúcia Cecconello
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170, Porto Alegre/RS, Brazil
| | - Priscila Zanini
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170, Porto Alegre/RS, Brazil
| | - Gabriela Niches
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170, Porto Alegre/RS, Brazil
| | - Luiz Carlos Kucharski
- Laboratório de Metabolismo e Endocrinologia Comparada, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170, Porto Alegre/RS, Brazil
| | - Maria Flávia M Ribeiro
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170, Porto Alegre/RS, Brazil
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14
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Cozer AG, Trapp M, Vieira Marques C, Martins TL, Model JFA, Schein V, Kucharski LC, Da Silva RSM. Stanniocalcin 1 Enhances Carbon Flux from Glucose to Lipids in White Retroperitoneal Adipose Tissue in the Fed Rat. Lipids 2016; 51:1303-1307. [PMID: 27730346 DOI: 10.1007/s11745-016-4202-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 09/30/2016] [Indexed: 12/18/2022]
Abstract
The present work assesses in vitro the role of human Stanniocalcin 1 (hSTC-1) in glucose metabolism in white retroperitoneal adipose tissue (WRAT) from fed rat. In the fed state, hSTC1 increases the incorporation of 14C from glucose into lipids in the rat WRAT. The increase in lipogenesis capacity supports the hypothesis that the activity of the glycerol-3-phosphate-generating pathway (glycolysis) from glucose is regulated by hSTC-1. The effect of hSTC-1 on de novo fatty acid synthesis and on glucose oxidation in WRAT is supported by an 85 % increase in 14CO2 production from 14C-glucose. The incubation of WRAT in the presence of hSTC-1 maintained the ADP/ATP ratio close to the control group. The presence of hSTC-1 in the incubation medium did not inhibit the lipolytic effect of epinephrine. In conclusion, hSTC-1 is one of the hormonal factors that control glucose metabolism in WRAT in the fed state.
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Affiliation(s)
- Aline G Cozer
- Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil.
| | - Márcia Trapp
- Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Claudia Vieira Marques
- Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Tiago L Martins
- Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Jorge Felipe A Model
- Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Vanessa Schein
- Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Luiz Carlos Kucharski
- Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Roselis S M Da Silva
- Department of Physiology, Institute of Health Sciences, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
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15
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Vieira-Marques C, Arbo BD, Ruiz-Palmero I, Ortiz-Rodriguez A, Ghorbanpoor S, Kucharski LC, Arevalo MA, Garcia-Segura LM, Ribeiro MFM. Dehydroepiandrosterone protects male and female hippocampal neurons and neuroblastoma cells from glucose deprivation. Brain Res 2016; 1644:176-82. [PMID: 27174000 DOI: 10.1016/j.brainres.2016.05.014] [Citation(s) in RCA: 11] [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: 12/23/2015] [Revised: 04/28/2016] [Accepted: 05/08/2016] [Indexed: 01/01/2023]
Abstract
Dehydroepiandrosterone (DHEA) modulates neurogenesis, neuronal function, neuronal survival and metabolism, enhancing mitochondrial oxidative capacity. Glucose deprivation and hypometabolism have been implicated in the mechanisms that mediate neuronal damage in neurological disorders, and some studies have shown that these mechanisms are sexually dimorphic. It was also demonstrated that DHEA is able to attenuate the hypometabolism that is related to some neurodegenerative diseases, eliciting neuroprotective effects in different experimental models of neurodegeneration. The aim of this study was to evaluate the effect of DHEA on the viability of male and female hippocampal neurons and SH-SY5Y neuroblastoma cells exposed to glucose deprivation. It was observed that after 12h of pre-treatment, DHEA was able to protect SH-SY5Y cells from glucose deprivation for 6h (DHEA 10(-12), 10(-8) and 10(-6)M) and 8h (DHEA 10(-8)M). In contrast, DHEA was not neuroprotective against glucose deprivation for 12 or 24h. DHEA (10(-8)M) also protected SH-SY5Y cells when added together or even 1h after the beginning of glucose deprivation (6h). Furthermore, DHEA (10(-8)M) also protected primary neurons from both sexes against glucose deprivation. In summary, our findings indicate that DHEA is neuroprotective against glucose deprivation in human neuroblastoma cells and in male and female mouse hippocampal neurons. These results suggest that DHEA could be a promising candidate to be used in clinical studies aiming to reduce neuronal damage in people from both sexes.
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Affiliation(s)
- Claudia Vieira-Marques
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170 Porto Alegre, RS, Brazil; Instituto Cajal, CSIC, Avenida Doctor Arce, 37, 28002 Madrid, Spain.
| | - Bruno Dutra Arbo
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170 Porto Alegre, RS, Brazil; Instituto Cajal, CSIC, Avenida Doctor Arce, 37, 28002 Madrid, Spain
| | | | | | | | - Luiz Carlos Kucharski
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170 Porto Alegre, RS, Brazil
| | - Maria A Arevalo
- Instituto Cajal, CSIC, Avenida Doctor Arce, 37, 28002 Madrid, Spain
| | | | - Maria Flávia M Ribeiro
- Laboratório de Interação Neuro-Humoral, Department of Physiology, ICBS, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, 90050-170 Porto Alegre, RS, Brazil
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16
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Pardo GVE, Goularte JF, Hoefel AL, de Castro AL, Kucharski LC, da Rosa Araujo AS, Lucion AB. Effects of sleep restriction during pregnancy on the mother and fetuses in rats. Physiol Behav 2016; 155:66-76. [DOI: 10.1016/j.physbeh.2015.11.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 11/29/2015] [Accepted: 11/30/2015] [Indexed: 01/15/2023]
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Cavagni J, de Macedo IC, Gaio EJ, Souza A, de Molon RS, Cirelli JA, Hoefel AL, Kucharski LC, Torres ILDS, Rösing CK. Obesity and Hyperlipidemia Modulate Alveolar Bone Loss in Wistar Rats. J Periodontol 2016; 87:e9-17. [DOI: 10.1902/jop.2015.150330] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Inohara ETS, Pinto CB, Model JFA, Trapp M, Kucharski LC, Da Silva RSM, Vinagre AS. Serotonin effects in the crab Neohelice granulata: Possible involvement of two types of receptors in peripheral tissues. Comp Biochem Physiol A Mol Integr Physiol 2015; 185:80-90. [DOI: 10.1016/j.cbpa.2015.03.012] [Citation(s) in RCA: 12] [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: 12/12/2014] [Revised: 03/13/2015] [Accepted: 03/16/2015] [Indexed: 11/24/2022]
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de Resende PE, Kaiser S, Pittol V, Hoefel AL, D'Agostini Silva R, Vieira Marques C, Kucharski LC, Ortega GG. Influence of crude extract and bioactive fractions of Ilex paraguariensis A. St. Hil. (yerba mate) on the Wistar rat lipid metabolism. J Funct Foods 2015. [DOI: 10.1016/j.jff.2015.03.040] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Rigon F, Horst A, Kucharski LC, Silva RSM, Faccioni-Heuser MC, Partata WA. Effects of sciatic nerve transection on glucose uptake in the presence and absence of lactate in the frog dorsal root ganglia and spinal cord. BRAZ J BIOL 2014; 74:S191-8. [DOI: 10.1590/1519-6984.26012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Accepted: 06/13/2013] [Indexed: 01/09/2023] Open
Abstract
Frogs have been used as an alternative model to study pain mechanisms because the simplicity of their nervous tissue and the phylogenetic aspect of this question. One of these models is the sciatic nerve transection (SNT), which mimics the clinical symptoms of “phantom limb”, a condition that arises in humans after amputation or transverse spinal lesions. In mammals, the SNT increases glucose metabolism in the central nervous system, and the lactate generated appears to serve as an energy source for nerve cells. An answerable question is whether there is elevated glucose uptake in the dorsal root ganglia (DRG) after peripheral axotomy. As glucose is the major energy substrate for frog nervous tissue, and these animals accumulate lactic acid under some conditions, bullfrogs Lithobates catesbeianus were used to demonstrate the effect of SNT on DRG and spinal cord 1-[14C] 2-deoxy-D-glucose (14C-2-DG) uptake in the presence and absence of lactate. We also investigated the effect of this condition on the formation of 14CO2 from 14C-glucose and 14C-L-lactate, and plasmatic glucose and lactate levels. The 3-O-[14C] methyl-D-glucose (14C-3-OMG) uptake was used to demonstrate the steady-state tissue/medium glucose distribution ratio under these conditions. Three days after SNT, 14C-2-DG uptake increased, but 14C-3-OMG uptake remained steady. The increase in 14C-2-DG uptake was lower when lactate was added to the incubation medium. No change was found in glucose and lactate oxidation after SNT, but lactate and glucose levels in the blood were reduced. Thus, our results showed that SNT increased the glucose metabolism in the frog DRG and spinal cord. The effect of lactate on this uptake suggests that glucose is used in glycolytic pathways after SNT.
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Affiliation(s)
| | - A Horst
- Universidade Federal do Rio Grande do Sul – UFRGS, Brazil
| | - LC Kucharski
- Universidade Federal do Rio Grande do Sul – UFRGS, Brazil
| | - RSM Silva
- Universidade Federal do Rio Grande do Sul – UFRGS, Brazil
| | | | - WA Partata
- Universidade Federal do Rio Grande do Sul – UFRGS, Brazil
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Pellegrino R, Martins TL, Pinto CB, Schein V, Kucharski LC, Da Silva RSM. Effect of starvation and refeeding on amino acid metabolism in muscle of crab Neohelice granulata previously fed protein- or carbohydrate-rich diets. Comp Biochem Physiol A Mol Integr Physiol 2013; 164:29-35. [DOI: 10.1016/j.cbpa.2012.08.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 08/06/2012] [Accepted: 08/07/2012] [Indexed: 11/25/2022]
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Resende PED, Verza SG, Kaiser S, Gomes LF, Kucharski LC, Ortega GG. The activity of mate saponins (Ilex paraguariensis) in intra-abdominal and epididymal fat, and glucose oxidation in male Wistar rats. J Ethnopharmacol 2012; 144:735-740. [PMID: 23088849 DOI: 10.1016/j.jep.2012.10.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 09/13/2012] [Accepted: 10/12/2012] [Indexed: 06/01/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Ilex paraguariensis A. St. Hilaire (mate) has traditionally been used in several South American countries to prepare tea-like beverages having stimulant effects on the CNS and appetite. In recent years, however, mate preparations have been recommended putatively as an appetite suppressant and slimming remedy. Moreover, studies carried out on either normal or diet-induced obese rats treated with mate extracts revealed anti-obesity and satiety effects, thus refuting ethnopharmacological data. In this work, the effect of mate on the intra-abdominal and epididymal fat, and glucose oxidation levels after oral administration in male Wistar rats, was studied using crude extract from leaves, unripe fruits, and a chemically well-defined purified saponin fraction (MSF). MATERIAL AND METHODS Saponin, polyphenol and methylxanthine contents in MSF were analyzed by HPLC-PDA and UPLC/Q-TOF-MS. Crude extracts from mate leaves (LAE) and unripe fruits (FHE) were assayed for comparison purposes. Male Wistar rats fed with standard diet and water ad libitum were used as the control group. RESULTS The fat weight and both liver and adipose glucose oxidation were reduced significantly by MSF (35, 90 and 60%, respectively), while LAE and FHE were less active. Also, a significant lowering of the blood triglycerides level was observed in rats treated with MSF and LAE. All creatinine, urea, and transaminase plasma levels remained unaffected no matter what mate preparation was considered. It is also worth pointing out that the glucose blood level was increased after treatment with FHE. This finding did not correlate either with the content of methylxanthines, polyphenols or saponins. CONCLUSION A reduction in both visceral fat weight and glucose oxidation of hepatic and adipose tissue in healthy rats fed with a standard diet could be ascribed to a purified mate saponin fraction from unripe fruits. These findings agree with former studies carried out with crude mate extracts and also suggest their potential use as an anti-obesity preparation. Nonetheless, further in vivo experiments are still required to corroborate its effect on human beings.
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Affiliation(s)
- Pedro Ernesto de Resende
- Programa de Pós-graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Porto Alegre 90610-000, RS, Brazil
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Oliveira UOD, Oliveira ÁRD, Kucharski LC, Machado UF, Irigoyen MC, Schaan BD. Efeitos da angiotensina-I e isquemia na recuperação funcional em corações isolados. Arq Bras Cardiol 2011; 97:390-6. [DOI: 10.1590/s0066-782x2011005000090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Accepted: 02/25/2011] [Indexed: 11/22/2022] Open
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Silva RD, Bueno ALS, Gallon CW, Gomes LF, Kaiser S, Pavei C, Ortega GG, Kucharski LC, Jahn MP. The effect of aqueous extract of gross and commercial yerba mate (Ilex paraguariensis) on intra-abdominal and epididymal fat and glucose levels in male Wistar rats. Fitoterapia 2011; 82:818-26. [DOI: 10.1016/j.fitote.2011.04.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 04/07/2011] [Accepted: 04/07/2011] [Indexed: 01/11/2023]
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Jahn MP, Gomes LF, Jacob MHVM, da Rocha Janner D, Araújo ASDR, Belló-Klein A, Ribeiro MFM, Kucharski LC. The effect of dehydroepiandrosterone (DHEA) on renal function and metabolism in diabetic rats. Steroids 2011; 76:564-70. [PMID: 21349280 DOI: 10.1016/j.steroids.2011.02.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2010] [Revised: 02/15/2011] [Accepted: 02/15/2011] [Indexed: 01/12/2023]
Abstract
Dehydroepiandrosterone (DHEA) is an endogenous steroid hormone involved in a number of biological actions in humans and rodents, but its effects on renal tissue have not yet been fully understood. The aim of this study is to assess the effect of DHEA treatment on diabetic rats, mainly in relation to renal function and metabolism. Diabetic rats were treated with subcutaneous injections of a 10mg/kg dose of DHEA diluted in oil. Plasma glucose and creatinine, in addition to urine creatinine, were quantified espectophotometrically. Glucose uptake and oxidation were quantified using radioactive glucose, the urinary Transforming Growth Factor β(1) (TGF-β(1)) was assessed by enzyme immunoassay, and the total glutathione in the renal tissue was also measured. The diabetic rats displayed higher levels of glycemia, and DHEA treatment reduced hyperglycemia. Plasmatic creatinine levels were higher in the diabetic rats treated with DHEA, while creatinine clearance was lower. Glucose uptake and oxidation were lower in the renal medulla of the diabetic rats treated with DHEA, and urinary TGF-β(1), as well as total gluthatione levels, were higher in the diabetic rats treated with DHEA. DHEA treatment was not beneficial to renal tissue, since it reduced the glomerular filtration rate and renal medulla metabolism, while increasing the urinary excretion of TGF-β(1) and the compensatory response by the glutathione system, probably due to a mechanism involving a pro-oxidant action or a pro-fibrotic effect of this androgen or its derivatives. In conclusion, this study reports that DHEA treatment may be harmful to renal tissue, but the mechanisms of this action have not yet been fully understood.
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Affiliation(s)
- Matheus Parmegiani Jahn
- Laboratório de Metabolismo e Endocrinologia Comparada, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500, Porto Alegre, Rio Grande do Sul CEP 90050-170, Brazil.
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Martins TL, Chittó ALF, Rossetti CL, Brondani CK, Kucharski LC, Da Silva RS. Effects of hypo- or hyperosmotic stress on lipid synthesis and gluconeogenic activity in tissues of the crab Neohelice granulata. Comp Biochem Physiol A Mol Integr Physiol 2011; 158:400-5. [DOI: 10.1016/j.cbpa.2010.11.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2010] [Revised: 11/22/2010] [Accepted: 11/23/2010] [Indexed: 11/16/2022]
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Jacob MHVM, da R. Janner D, Jahn MP, Kucharski LC, Belló-Klein A, Ribeiro MFM. Age-related effects of DHEA on peripheral markers of oxidative stress. Cell Biochem Funct 2010; 28:52-7. [DOI: 10.1002/cbf.1619] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Valle SC, Eichler P, Maciel JE, Machado G, Kucharski LC, Da Silva RSM. Seasonal variation in glucose and neutral amino acid uptake in the estuarine crab Neohelice granulata. Comp Biochem Physiol A Mol Integr Physiol 2009; 153:252-7. [DOI: 10.1016/j.cbpa.2009.02.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2008] [Revised: 02/13/2009] [Accepted: 02/14/2009] [Indexed: 10/21/2022]
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Ferreira AA, Kucharski LC, Araújo AMD. On the reliability of a simple method for scoring phenotypes to estimate heritability: A case study with pupal color in Heliconius erato phyllis , Fabricius 1775 (Lepidoptera, Nymphalidae). Genet Mol Biol 2009; 32:186-9. [PMID: 21637666 PMCID: PMC3032950 DOI: 10.1590/s1415-47572009005000005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2008] [Accepted: 06/17/2008] [Indexed: 11/25/2022] Open
Abstract
In this paper, two methods for assessing the degree of melanization of pupal exuviae from the butterfly Heliconius erato phyllis, Fabricius 1775 (Lepidoptera, Nymphalidae, Heliconiini) are compared. In the first method, which was qualitative, the exuviae were classified by scoring the degree of melanization, whereas in the second method, which was quantitative, the exuviae were classified by optical density followed by analysis with appropriate software. The heritability (h2) of the degree of melanization was estimated by regression and analysis of variance. The estimates of h 2 were similar with both methods, indicating that the qualitative method could be particularly suitable for field work. The low estimates obtained for heritability may have resulted from the small sample size (n = 7-18 broods, including the parents) or from the allocation-priority hypothesis in which pupal color would be a lower priority trait compared to morphological traits and adequate larval development.
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Affiliation(s)
- Adriano Andrejew Ferreira
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Brazil
| | | | - Aldo Mellender de Araújo
- Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Brazil
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Maciel JES, Souza F, Valle S, Kucharski LC, da Silva RSM. Lactate metabolism in the muscle of the crab Chasmagnathus granulatus during hypoxia and post-hypoxia recovery. Comp Biochem Physiol A Mol Integr Physiol 2008; 151:61-5. [PMID: 18619883 DOI: 10.1016/j.cbpa.2008.05.178] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2007] [Revised: 05/26/2008] [Accepted: 05/27/2008] [Indexed: 11/15/2022]
Abstract
The present study showed that the lactate/glucose ratio in the hemolymph of Chasmagnathus granulatus maintained in normoxia (controls) was 4.9, suggesting that lactate is an important substrate for this crab. Periods of hypoxia are part of the biological cycle of this crab, and lactate is the main end product of anaerobiosis in this crab. Our hypothesis was that this lactate would be, therefore, used by gluconeogenic pathway or can be oxidized or excreted to the aquatic medium during hypoxia and post-hypoxia periods in C. granulatus. The concentrations of hemolymphatic lactate in animals in normoxia are high, and are used as an energy substrate. In hypoxia, muscle gluconeogenesis and excretion of lactate to the aquatic medium would contribute significantly in regulating the concentration of circulating lactate. Utilization of these pathways would serve the objective of maintaining the acid-base equilibrium of the organism. Muscle gluconeogenesis participates, during the recovery process, in metabolizing the lactate produced during the period of hypoxia. Lactate excretion to the external medium, was one of the strategies used to decrease the higher hemolymphatic lactate levels. However, oxidation of lactate in the muscle is not a main strategy used by this crab to metabolize lactate in the recovery periods.
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Affiliation(s)
- José Eduardo S Maciel
- Department of Physiology, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, 90050-170 Porto Alegre, RS, Brazil
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de Oliveira UO, Belló-Klein A, Kucharski LC. Oxidative balance and immunodetection of antioxidant enzymes in the hepatopancreas of the crabChasmagnathus granulatasubjected to anoxia and reoxygenation. CAN J ZOOL 2006. [DOI: 10.1139/z06-041] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The present study shows the activities and concentrations of the antioxidant enzymes superoxide dismutase (SOD) and glutathione S-transferase (GST) in the hepatopancreas of the crab Chasmagnathus granulata (Dana, 1851) (Decapoda, Brachyura) when exposed to periods of anoxia (8 h) and aerobic recovery (20 and 40 min post anoxia). Exposure to anoxia did not cause any change in the activities of the enzymes analyzed. The activities of these enzymes did not change with a decrease in environmental oxygen concentration. During reoxygenation, enzyme activities returned to control levels. The concentrations and activities of SOD and GST presented different response profiles. Exposure to anoxia caused increased lipoperoxidation (conjugated dienes and thiobarbituric acid reactive substances), whereas aerobic recovery reduced lipoperoxidation. The results of this study showed that C. granulata adjusts its antioxidant defense systems in an attempt to reduce and (or) avoid damage resulting from the reintroduction of oxygen.
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Affiliation(s)
- Ubirajara O. de Oliveira
- Departamento de Fisiologia, Instituto de Ciencias Basicas da Saude (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, Gabinete 2, Cidade Baixa, Porto Alegre, RS 90050-170, Brazil
| | - Adriane Belló-Klein
- Departamento de Fisiologia, Instituto de Ciencias Basicas da Saude (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, Gabinete 2, Cidade Baixa, Porto Alegre, RS 90050-170, Brazil
| | - Luiz Carlos Kucharski
- Departamento de Fisiologia, Instituto de Ciencias Basicas da Saude (ICBS), Universidade Federal do Rio Grande do Sul (UFRGS), Rua Sarmento Leite, 500, Gabinete 2, Cidade Baixa, Porto Alegre, RS 90050-170, Brazil
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Schein V, Fernandes Chittó AL, Etges R, Kucharski LC, van Wormhoudt A, Da Silva RSM. Effect of hyper or hypo-osmotic conditions on neutral amino acid uptake and oxidation in tissues of the crab Chasmagnathus granulata. Comp Biochem Physiol B Biochem Mol Biol 2005; 140:561-7. [PMID: 15763511 DOI: 10.1016/j.cbpc.2004.12.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2003] [Revised: 11/25/2004] [Accepted: 12/08/2004] [Indexed: 11/22/2022]
Abstract
We investigated the transport of (14)C-methylaminoisobutyric acid ((14)C-MeAIB) and (14)C-alanine oxidation in hepatopancreas and jaw muscle of Chasmagnathus granulata submitted to 24, 72, and 144 h of hypo- or hyperosmotic stress. While (14)C-MeAIB uptake increased in jaw muscle and hepatopancreas from crabs submitted to hyperosmotic stress, it did not change in tissues from animals submitted to hypo-osmotic stress. Incubation of jaw muscle and hepatopancreas from control groups with 1 mM ouabain did not decrease (14)C-MeAIB uptake. However, ouabain prevented (14)C-MeAIB uptake in hepatopancreas at 24 h of hyperosmotic stress. In contrast, in jaw muscle from crabs submitted to the same conditions, (14)C-MeAIB uptake was not prevented by ouabain in the incubation medium. Jaw muscle from the control group produced four times more (14)CO(2) from (14)C-alanine than the hepatopancreas. During hypo-osmotic stress, amino acid oxidation does not seem to be one of the pathways implicated in the decrease of the amino acid pools in hepatopancreas and jaw muscle. In contrast, during hyperosmotic stress the reduction in (14)C-alanine oxidation appears to be one of the mechanisms involved in the increase of the amino acid pool in the hepatopancreas.
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Affiliation(s)
- Vanessa Schein
- Department of Physiology, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, 90050-170 Porto Alegre, RS, Brazil
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de Oliveira UO, da Rosa Araújo AS, Belló-Klein A, da Silva RSM, Kucharski LC. Effects of environmental anoxia and different periods of reoxygenation on oxidative balance in gills of the estuarine crab Chasmagnathus granulata. Comp Biochem Physiol B Biochem Mol Biol 2005; 140:51-7. [PMID: 15621509 DOI: 10.1016/j.cbpc.2004.09.026] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2004] [Revised: 09/10/2004] [Accepted: 09/12/2004] [Indexed: 11/29/2022]
Abstract
We investigated the effects of anoxia (8 h) and different periods of reoxygenation (20 and 40 min) on the oxidative balance in anterior and posterior gills of the crab Chasmagnathus granulata. Enzyme activity of catalase and GST was increased in the gills of the animals submitted to anoxia, and SOD activity was decreased. These enzymes returned approximately to control levels during the anoxia recovery time. These results demonstrated enzyme activities change with variations in environmental oxygen levels. The posterior gills showed a higher antioxidant enzyme activity than anterior gills. In the gills, there were no changes in the non-enzymatic antioxidant system (TRAP) during anoxia. On the other hand, during anoxia recovery, an increase of TRAP in both gills was observed. Anoxia does not change lipid peroxidation (TBARS) in the gills. During anoxia recuperation, an increase in levels of TBARS was observed. Thus the results demonstrate that C. granulata has a similar strategy of preparation for oxidative stress as observed in other intertidal species, enabling the crabs to survive in an environment with extreme variations in physical and chemical characteristics, such as salt marshes.
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Schein V, Waché Y, Etges R, Kucharski LC, van Wormhoudt A, Da Silva RSM. Effect of hyperosmotic shock on phosphoenolpyruvate carboxykinase gene expression and gluconeogenic activity in the crab muscle. FEBS Lett 2004; 561:202-6. [PMID: 15013778 DOI: 10.1016/s0014-5793(04)00162-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2003] [Revised: 01/30/2004] [Accepted: 02/10/2004] [Indexed: 11/26/2022]
Abstract
Chasmagnathus granulata phosphoenolpyruvate carboxykinase (PEPCK) cDNA from jaw muscle was cloned and sequenced, showing a specific domain to bind phosphoenolpyruvate in addition to the kinase-1 and kinase-2 motifs to bind guanosine triphosphate (GTP) and Mg(2+), respectively, specific for all PEPCKs. In the kinase-1 motifs the GK was changed to RK. The first 19 amino acids of the putative enzyme contain hydrophobic amino acids and hydroxylated residues specific to a mitochondrial type signal. The PEPCK is expressed in hepatopancreas, muscles, nervous system, heart, and gills. Hyperosmotic stress for 24 h increased the PEPCK mRNA level, gluconeogenic and PEPCK activities in muscle.
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Affiliation(s)
- Vanessa Schein
- Department of Physiology, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
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Kucharski LC, Schein V, Capp E, da Silva RSM. In vitro insulin stimulatory effect on glucose uptake and glycogen synthesis in the gills of the estuarine crab Chasmagnathus granulata. Gen Comp Endocrinol 2002; 125:256-63. [PMID: 11884071 DOI: 10.1006/gcen.2001.7748] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of the present study was to examine the effects of insulin on glucose uptake and glycogen synthesis in crab Chasmagnathus granulata gills. We observed an increased glucose uptake and incorporation of d-[(14)C]glucose into glycogen when posterior C. granulata gills were incubated in the presence of insulin; however, this was not observed in anterior gills, despite the presence of similar insulin receptors. In posterior gills, basal glucose uptake in the summer was significantly higher than in the winter. Moreover, in the summer, the insulin dose required to stimulate glucose uptake was twice as high as in the winter. However, there was no significant difference in terms of basal glycogen synthesis in summer and winter. In crustaceans, the endogenous insulin/IGFI substance might be involved in the rapid restoration of glycogen levels in the gills, increasing glucose uptake and glycogen synthesis. Bovine insulin seems to have a stimulatory effect on glycogen metabolism only in posterior gills.
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Affiliation(s)
- Luiz Carlos Kucharski
- Department of Physiology, Instituto de Ciências Básicas da Saúde, Porto Alegre, RS, 90050-170, Brazil
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Kucharski LC, Ribeiro MF, Schein V, da Silva RS, Marques M. Insulin binding sites in gills of the estuarine crab Chasmagnathus granulata. J Exp Zool 1997; 279:118-125. [PMID: 9293637] [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] [Indexed: 05/22/2023]
Abstract
Bovine 125I-insulin was injected into the estuarine crab Chasmagnathus granulata in order to study its distribution and specific uptake by tissues. The highest radioactivity uptake occurred in both anterior and posterior gills, which reached maximum values at 30-60 min following labeled insulin administration. Heart and hepatopancreas concentrated a very low amount of radioactivity (only 9 and 3%, respectively, of that shown by gills). A significant reduction of the uptake was observed in the gills when an excess of unlabeled insulin was injected together with the labeled hormone. In vitro studies also showed specific uptake of 125I-insulin by the gills incubated at 25 degrees C, which reached a plateau after 120-min incubation, suggesting a saturable process. The inhibition of 125I-insulin uptake was dose dependent on unlabeled insulin. Glucagon did not compete with radioactivity uptake by gills in vivo and in vitro. Further characterization of insulin-binding sites was performed in gill membrane. The amount of unlabeled insulin that prevented 50% of the 125I-insulin uptake was 7.78 micrograms/ml, and the Scatchard plot analysis established the presence of binding site with Kd of 3.11 microM and Bmax of 0.14 microM (r = 0.99). Ovine prolactin was not able to prevent. 125I-insulin binding to gill membrane. These findings seem to indicate the presence of specific binding sites for insulin or insulin-like substance in crab gills, which deserves further studies.
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Affiliation(s)
- L C Kucharski
- Departamento de Fisiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
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