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Jiang GH, Wang G, Luo C, Wang YF, Qiu JF, Peng RJ, Sima YH, Xu SQ. Mechanism of hyperproteinemia-induced damage to female reproduction in a genetic silkworm model. iScience 2023; 26:107860. [PMID: 37752953 PMCID: PMC10518704 DOI: 10.1016/j.isci.2023.107860] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/11/2023] [Accepted: 09/06/2023] [Indexed: 09/28/2023] Open
Abstract
Hyperproteinemia is a metabolic disorder characterized by abnormally elevated plasma protein concentrations (PPC) in humans and animals. Here, a genetic silkworm model with high PPC was employed to investigate the effect of elevated PPC on female reproduction. Transcriptomic analysis revealed that high PPC induces downregulation of the ovarian development-related genes and disrupts ovarian sugar metabolism. Biochemical and endocrinal analyses revealed that high PPC increases trehalose and glucose levels in hemolymph and glycogen content in the fat body through activation of the gluconeogenic pathway and inhibition of the Insulin/Insulin-like growth factor signaling pathway-the serine/threonine kinase (IIS-AKT) pathway, thus disrupting characteristic metabolic homeostasis of sugar in the ovary. These resulted in ovarian developmental delay as well as reduced number and poor quality of eggs. Insulin supplementation effectively increased egg numbers by lowering blood sugar. These collective results provide new insights into the mechanisms by which high PPC negatively affects female reproduction and support the potential therapeutic effects of insulin.
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Affiliation(s)
- Gui-Hua Jiang
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Guang Wang
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Cheng Luo
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Yong-Feng Wang
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Jian-Feng Qiu
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Ru-Ji Peng
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Yang-Hu Sima
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
| | - Shi-Qing Xu
- School of Biology and Basic Medical Sciences, Suzhou Medical College, Soochow University, Suzhou 215123, China
- Institute of Agricultural Biotechnology & Ecology (IABE), Soochow University, Suzhou 215123, China
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Klöppel E, Souza MR, Barco VS, Gallego FQ, Sinzato YK, Corrente JE, Rodrigues T, Volpato GT, Damasceno DC. Calcium Supplementation on Glucose Tolerance, Oxidative Stress, and Reproductive Outcomes of Diabetic Rats and Their Offspring. Reprod Sci 2023; 30:2813-2828. [PMID: 37002533 DOI: 10.1007/s43032-023-01217-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 03/09/2023] [Indexed: 04/03/2023]
Abstract
Diabetes mellitus increases the risk of obstetric complications, morbidity, and infant mortality. Controlled nutritional therapy with micronutrients has been employed. However, the effect of calcium (Ca2+) supplementation on diabetic pregnancy is unclear. We aimed to evaluate whether diabetic rats supplemented with Ca2+ during pregnancy present better glucose tolerance, redox status, embryonic and fetal development, newborn weight, and the prooxidant and antioxidant balance of male and female pups. For this, newborn rats received the beta-cytotoxic drug streptozotocin for inducing diabetes on the day of birth. In adulthood, these rats were mated and treated with Ca2+ twice a day from day 0 to day 20 of pregnancy. On day 17, the pregnant rats were submitted to the oral glucose tolerance test (OGTT). At the end of pregnancy, they were anesthetized and killed to collect blood and pancreas samples. The uterine horns were exposed for an evaluation of maternal reproductive outcomes and embryofetal development, and the offspring's liver samples were collected for redox status measurement. Nondiabetic and diabetic rats supplemented with Ca2+ showed no influence on glucose tolerance, redox status, insulin synthesis, serum calcium levels, and embryofetal losses. The reduced rate of newborns classified as adequate for gestational age (AGA) and higher rates of LGA (large) and small (LGA) newborns and higher -SH and GSH-Px antioxidant activities in female pups were observed in diabetic dams, regardless of supplementation. Thus, maternal supplementation caused no improvement in glucose tolerance, oxidative stress biomarkers, embryofetal growth and development, and antioxidants in pups from diabetic mothers.
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Affiliation(s)
- Eduardo Klöppel
- Laboratory of Experimental Research On Gynecology and Obstetrics, Postgraduate Course On Tocogynecology, Botucatu Medical School, São Paulo State University_UNESP, Botucatu, São Paulo State, Brazil
| | - Maysa Rocha Souza
- Laboratory of Experimental Research On Gynecology and Obstetrics, Postgraduate Course On Tocogynecology, Botucatu Medical School, São Paulo State University_UNESP, Botucatu, São Paulo State, Brazil
- Laboratory of System Physiology and Reproductive Toxicology, Federal University of Mato Grosso_UFMT, Mato Grosso State, Barra Do Garças, Brazil
| | - Vinícius Soares Barco
- Laboratory of Experimental Research On Gynecology and Obstetrics, Postgraduate Course On Tocogynecology, Botucatu Medical School, São Paulo State University_UNESP, Botucatu, São Paulo State, Brazil
| | - Franciane Quintanilha Gallego
- Laboratory of Experimental Research On Gynecology and Obstetrics, Postgraduate Course On Tocogynecology, Botucatu Medical School, São Paulo State University_UNESP, Botucatu, São Paulo State, Brazil
| | - Yuri Karen Sinzato
- Laboratory of Experimental Research On Gynecology and Obstetrics, Postgraduate Course On Tocogynecology, Botucatu Medical School, São Paulo State University_UNESP, Botucatu, São Paulo State, Brazil
| | - José Eduardo Corrente
- Research Support Office, Botucatu Medical School, Sao Paulo State University (UNESP), Botucatu, São Paulo State, Brazil
| | - Tiago Rodrigues
- Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), Santo André, São Paulo, SP, Brazil
| | - Gustavo Tadeu Volpato
- Laboratory of Experimental Research On Gynecology and Obstetrics, Postgraduate Course On Tocogynecology, Botucatu Medical School, São Paulo State University_UNESP, Botucatu, São Paulo State, Brazil
- Laboratory of System Physiology and Reproductive Toxicology, Federal University of Mato Grosso_UFMT, Mato Grosso State, Barra Do Garças, Brazil
| | - Débora Cristina Damasceno
- Laboratory of Experimental Research On Gynecology and Obstetrics, Postgraduate Course On Tocogynecology, Botucatu Medical School, São Paulo State University_UNESP, Botucatu, São Paulo State, Brazil.
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Influence of Swimming Program on the Blood Pressure of Pregnant Hypertensive Rats and Their Fetuses. REPRODUCTIVE SCIENCES (THOUSAND OAKS, CALIF.) 2021; 28:3440-3447. [PMID: 33987823 DOI: 10.1007/s43032-021-00617-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 05/10/2021] [Indexed: 12/11/2022]
Abstract
The hypertension incidence and its complication on pregnant women are growing and can lead to adverse consequences on their fetuses. However, it is known that regular exercise practice can be healthful to hypertensive pregnant women but harmful to fetal growth. So, the objective of this study was to evaluate the effects of exercise beginning before pregnancy or during pregnancy on the maternal blood pressure and reproductive outcome and on the fetal development of spontaneously hypertensive rats (SHR). Pregnant SHR were randomly distributed into three experimental groups: (1) SHR-Control, non-exercised; (2) SHR-Ex0, rats submitted to physical exercise (swimming program) from day zero to 20 of pregnancy; (3) and SHR-ExPr, rats submitted to swimming program before and during pregnancy. At end of pregnancy (day 21), the rats were anesthetized, and reproductive parameters and fetal development were assessed. Blood pressure was reduced at the end of pregnancy in all the groups. Regardless of swimming exposure time, there was reduced maternal weight gain. The exercise decreased fetal weight at term pregnancy, with a higher percentage of small for gestational age (SGA) fetuses and lower number ossification sites, indicating intrauterine growth restriction (IUGR). In conclusion, our findings provide insight to support that swimming exercise in pregnant SHR impairs fetal development, causing IUGR and visceral malformations. Therefore, the indication of physical exercise must be defined very carefully, as it can compromise fetal development.
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Godoy LD, Garcia-Cairasco N. Maternal behavior and the neonatal HPA axis in the Wistar Audiogenic Rat (WAR) strain: Early-life implications for a genetic animal model in epilepsy. Epilepsy Behav 2021; 117:107877. [PMID: 33714185 DOI: 10.1016/j.yebeh.2021.107877] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 12/28/2020] [Accepted: 02/20/2021] [Indexed: 10/21/2022]
Abstract
Epileptogenesis is a multistage process and seizure susceptibility can be influenced by stress early in life. Wistar Audiogenic Rat (WAR) strain is an interesting model to study the association between stress and epilepsy, since it is naturally susceptible to seizures and present changes in the hypothalamus-pituitary-adrenal (HPA) axis activity. All these features are related to the pathogenic mechanisms usually associated with psychiatric comorbidities present in epilepsy. Therefore, the current study aimed to evaluate the neonate HPA axis function and maternal care under control and stress conditions in the WAR strain. Maternal behavior and neonate HPA axis were evaluated in Wistar and WAR strains under rest and after the presence of stressors. We observed that WAR pups present higher plasmatic corticosterone concentration as compared to Wistar pups. Although WAR dams do not show significant altered maternal behavior at rest, there is a higher latency to recover the litter in the pup retrieval test, while some did not recover all the litter. Wistar Audiogenic Rat dams presented similar behaviors to Wistar dams to a female intruder and maternal care with the pups in the maternal defense test. Taken together, these findings indicate that the WAR strain could show HPA axis disruption early in life and dams present altered maternal behavior under stressful events. Those alterations make the WAR strain an interesting model to evaluate vulnerability to epilepsy and its associated neuropsychiatric comorbidities.
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Affiliation(s)
- Lívea Dornela Godoy
- Physiology Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Norberto Garcia-Cairasco
- Physiology Department, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, SP, Brazil; Department of Neuroscience and Behavioral Sciences, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil.
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Sinzato YK, Klöppel E, Miranda CA, Paula VG, Alves LF, Nascimento LL, Campos AP, Karki B, Hampl V, Volpato GT, Damasceno DC. Comparison of streptozotocin-induced diabetes at different moments of the life of female rats for translational studies. Lab Anim 2021; 55:329-340. [PMID: 33752496 DOI: 10.1177/00236772211001895] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Animal models are widely used for studying diabetes in translational research. However, methods for induction of diabetes are conflicting with regards to their efficacy, reproducibility and cost. A comparison of outcomes between the diabetic models is still unknown, especially full-term pregnancy.To understand the comparison, we analyzed the streptozotocin (STZ)-induced diabetes at three life-different moments during the neonatal period in Sprague-Dawley female rats: at the first (D1), second (D2) and fifth (D5) day of postnatal life. At adulthood (90 days; D90), the animals were submitted to an oral glucose tolerance test (OGTT) for diabetic status confirmation. The diabetic and control rats were mated and sacrificed at full-term pregnancy for different analyses. Group D1 presented a higher mortality percentage after STZ administration than groups D2 and D5. All diabetic groups presented higher blood glucose levels as compared to those of the control group, while group D5 had higher levels of glycemia compared with other groups during OGTT. The diabetic groups showed impaired reproductive outcomes compared with the control group. Group D1 had lower percentages of mated rats and D5 showed a lower percentage of a full-term pregnancy. Besides that, these two groups also showed the highest percentages of inadequate fetal weight. In summary, although all groups fulfill the diagnosis criteria for diabetes in adult life, in our investigation diabetes induced on D5 presents lower costs and higher efficacy and reproducibility for studies involving diabetes-complicated pregnancy.
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Affiliation(s)
- Yuri K Sinzato
- Laboratory of Experimental Research on Gynecology and Obstetrics, São Paulo State University (UNESP), Brazil
| | - Eduardo Klöppel
- Laboratory of Experimental Research on Gynecology and Obstetrics, São Paulo State University (UNESP), Brazil
| | - Carolina A Miranda
- Laboratory of Experimental Research on Gynecology and Obstetrics, São Paulo State University (UNESP), Brazil
| | - Verônyca G Paula
- Laboratory of Experimental Research on Gynecology and Obstetrics, São Paulo State University (UNESP), Brazil
| | - Larissa F Alves
- Laboratory of Experimental Research on Gynecology and Obstetrics, São Paulo State University (UNESP), Brazil
| | | | - Ana Paula Campos
- Laboratory of Experimental Research on Gynecology and Obstetrics, São Paulo State University (UNESP), Brazil
| | | | - Václav Hampl
- Department of Physiology, Charles University, Czech Republic
| | - Gustavo T Volpato
- Laboratory of System Physiology and Reproductive Toxicology, Federal University of Mato Grosso (UFMT), Brazil
| | - Débora C Damasceno
- Laboratory of Experimental Research on Gynecology and Obstetrics, São Paulo State University (UNESP), Brazil
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