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Awamleh Z, Choufani S, Cytrynbaum C, Alkuraya F, Scherer S, Fernandes S, Rosas C, Louro P, Dias P, Neves M, Sousa S, Weksberg R. ANKRD11 pathogenic variants and 16q24.3 microdeletions share an altered DNA methylation signature in patients with KBG syndrome. Hum Mol Genet 2022; 32:1429-1438. [PMID: 36440975 PMCID: PMC10117159 DOI: 10.1093/hmg/ddac289] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 11/03/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
Abstract
Pathogenic variants in ANKRD11 or microdeletions at 16q24.3 are the cause of KBG syndrome (KBGS), a neurodevelopmental syndrome characterized by intellectual disability, dental and skeletal anomalies, and characteristic facies. The ANKRD11 gene encodes the ankyrin repeat-containing protein 11A transcriptional regulator, expressed in the brain and implicated in neural development. Syndromic conditions caused by pathogenic variants in epigenetic regulatory genes show unique patterns of DNA methylation (DNAm) in peripheral blood termed DNAm signatures. Given ANKRD11’s role in chromatin modification, we tested whether pathogenic ANKRD11 variants underlying KBGS are associated with a DNAm signature. We profiled whole-blood DNAm in 21 individuals with ANKRD11 variants, 2 individuals with microdeletions at 16q24.3, and 28 typically developing individuals, using Illumina’s Infinium EPIC array. We identified 95 differentially methylated CpG sites that distinguished individuals with KBGS and pathogenic variants in ANKRD11 (n = 14) from typically developing controls (n = 28) and was also validated in seven additional individuals with pathogenic ANKRD11 variants. We generated a machine learning model from the KBGS DNAm signature and classified the DNAm profiles of 4 individuals with variants of uncertain significance (VUS) in ANKRD11. We identified an intermediate classification score for an inherited missense variant transmitted from a clinically unaffected mother to her affected child. In conclusion, we show the DNAm profile of two individuals with 16q24.3 microdeletions, was indistinguishable from the DNAm profile of individuals with pathogenic variants in ANKRD11 and we demonstrate the diagnostic utility of the new KBGS signature by classifying the DNAm profiles of individuals with VUS in ANKRD11.
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Affiliation(s)
- Zain Awamleh
- Genetics and Genome Biology Program , Research Institute, The Hospital for Sick Children, Toronto, Ontario , Canada
| | - Sanaa Choufani
- Genetics and Genome Biology Program , Research Institute, The Hospital for Sick Children, Toronto, Ontario , Canada
| | - Cheryl Cytrynbaum
- Division of Clinical & Metabolic Genetics , The Hospital for Sick Children, Toronto, Ontario , Canada
| | - Fowzan Alkuraya
- Department of Translational Genomics , Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center, Riyadh , Saudi Arabia
| | - Stephen Scherer
- Genetics and Genome Biology Program , Research Institute, The Hospital for Sick Children, Toronto, Ontario , Canada
- Department of Molecular Genetics , University of Toronto, Ontario , Canada
- Institute of Medical Sciences , University of Toronto, Toronto, Ontario , Canada
| | - Sofia Fernandes
- Medical Genetics Unit , Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, EPE, Coimbra , Portugal
- Familial Risk Clinic , Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisboa , Portugal
| | - Catarina Rosas
- Medical Genetics Unit , Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, EPE, Coimbra , Portugal
| | - Pedro Louro
- Medical Genetics Unit , Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, EPE, Coimbra , Portugal
| | - Patricia Dias
- Serviço de Genética Médica , Departamento de Pediatria, Centro Hospitalar Lisboa Norte, Hospital de Santa Maria, EPE, Lisboa , Portugal
| | - Mariana Neves
- Serviço de Genética Médica , Departamento de Pediatria, Centro Hospitalar Lisboa Norte, Hospital de Santa Maria, EPE, Lisboa , Portugal
| | - Sergio Sousa
- Medical Genetics Unit , Hospital Pediátrico, Centro Hospitalar e Universitário de Coimbra, EPE, Coimbra , Portugal
| | - Rosanna Weksberg
- Genetics and Genome Biology Program , Research Institute, The Hospital for Sick Children, Toronto, Ontario , Canada
- Division of Clinical & Metabolic Genetics , The Hospital for Sick Children, Toronto, Ontario , Canada
- Department of Molecular Genetics , University of Toronto, Ontario , Canada
- Institute of Medical Sciences , University of Toronto, Toronto, Ontario , Canada
- Department of Paediatrics , University of Toronto, Toronto, Ontario , Canada
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Del Vecchio G, Galindo-Sánchez CE, Tripp-Valdez MA, López-Landavery EA, Rosas C, Mascaró M. Transcriptomic response in thermally challenged seahorses Hippocampus erectus: The effect of magnitude and rate of temperature change. Comp Biochem Physiol B Biochem Mol Biol 2022; 262:110771. [PMID: 35691555 DOI: 10.1016/j.cbpb.2022.110771] [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: 02/20/2022] [Revised: 05/17/2022] [Accepted: 06/06/2022] [Indexed: 10/18/2022]
Abstract
Hippocampus erectus inhabiting the shallow coastal waters of the southern Gulf of Mexico are naturally exposed to marked temperature variations occurring in different temporal scales. Under such heterogeneous conditions, a series of physiological and biochemical adjustments take place to restore and maintain homeostasis. This study investigated the molecular mechanisms involved in the response of H. erectus to increased temperature using transcriptome analysis based on RNA-Seq technology. Data was obtained from seahorses after 0.5-h exposure to combinations of different target temperatures (26 °C: control, and increased to 30 and 33 °C) and rates of thermal increase (abrupt: < 5 min; gradual: 1-1.5 °C every 3 h). The transcriptome of seahorses was assembled de novo using Trinity software to obtain 29,211 genes and 30,479 transcripts comprising 27,520,965 assembled bases. Seahorse exposure to both 30 and 33 °C triggered characteristic processes of the cellular stress response, regardless of the rate of thermal change. The transcriptomic profiles of H. erectus suggest an arrest of muscle development processes, the activation of heat shock proteins, and a switch to anaerobic metabolism within the first 0.5 h of exposure to target temperatures to ensure energy supply. Interestingly, apoptotic processes involving caspase were activated principally in gradual treatments, suggesting that prolonged exposure to even sublethal temperatures results in the accumulation of deleterious effects that may eventually terminate in cellular death. Results herein validate 30 °C and 33 °C as potential upper limits of thermal tolerance for H. erectus at the southernmost boundary of its geographic distribution.
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Affiliation(s)
- G Del Vecchio
- Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - C E Galindo-Sánchez
- Departamento de Biotecnología Marina, Laboratorio de Genómica Funcional, CICESE, Ensenada, Baja California, Mexico. https://twitter.com/ClaraGalindo3
| | - M A Tripp-Valdez
- Departamento de Biotecnología Marina, Laboratorio de Genómica Funcional, CICESE, Ensenada, Baja California, Mexico. https://twitter.com/MiguelTripp
| | - E A López-Landavery
- Departamento de Biotecnología Marina, Laboratorio de Genómica Funcional, CICESE, Ensenada, Baja California, Mexico. https://twitter.com/EdgarLo30205255
| | - C Rosas
- Unidad Multidisciplinaria de Docencia e Investigación-Sisal, Facultad de Ciencias, Universidad Nacional Autónoma de México, Sisal, Yucatán, Mexico. https://twitter.com/DrCarlosRosasV
| | - M Mascaró
- Unidad Multidisciplinaria de Docencia e Investigación-Sisal, Facultad de Ciencias, Universidad Nacional Autónoma de México, Sisal, Yucatán, Mexico.
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Rosas C, Rattay T, Azria D, Elliott R, Gutiérrez-Enríquez S, Rancati T, Rosenstein B, De Ruysscher D, Sperk E, Stobart H, Symonds R, Talbot C, De Santis M, Vega A, Veldeman L, Webb A, West C, Chang-Claude J, Seibold P. MO-0804 Determinants of fatigue and longitudinal changes up to 2 years post-radiotherapy for breast cancer. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)02440-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Neri V, Rosas C, Figueiredo L, Nunes A, Chagas L, Menezes A, Britto R, Alves A, Da Silva J. Neurophobia in medical schools: A current issue. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Neri V, Rosas C, Ribeiro AL, Nunes A, Alves M, Fernandes A, Licassali G. Quality of life and caregivers' burden of Parkinson's disease: Analysis of a cohort from Rio de Janeiro/Brazil. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mascaró M, Horta JL, Diaz F, Paschke K, Rosas C, Simões N. Effect of a gradually increasing temperature on the behavioural and physiological response of juvenile Hippocampus erectus: Thermal preference, tolerance, energy balance and growth. J Therm Biol 2019; 85:102406. [PMID: 31657747 DOI: 10.1016/j.jtherbio.2019.102406] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Revised: 08/13/2019] [Accepted: 08/25/2019] [Indexed: 12/17/2022]
Abstract
The physiological and behavioural responses of ectotherms to temperature is strongly dependent on the individuals' previous thermal history. Laboratory based studies investigating the mechanisms of thermoregulation in marine ectotherms, however, rarely consider key temporal elements of thermal exposure, such as the rate at which temperature changes. We tested the hypothesis that juvenile seahorses, Hippocampus erectus, from a tropical coastal lagoon in Yucatan, Mexico, would exhibit variations in physiological and behavioural descriptors of thermoregulation when submitted to contrasting regimes during 30 days: temperature constant at 25 °C (C 25); gradually increasing 1 °C every 5 days from 25 to 30 °C (GI 25-30); and constant at 30 °C (C 30). Immediately after exposure, critical maximum temperature, thermal preference, oxygen consumption, partial energy balance, growth rate and survival of seahorses were measured. Seahorses exposed to GI 25-30 showed a significantly higher critical thermal maxima (37.8 ± 0.9 °C), preference (28.7 ± 0.4 °C), growth (1.10 ± 0.49%) and survival (97.6%) than those exposed to C 30 (36.5 ± 1, 29.4 ± 0.3 °C, 0.48 ± 0.32%, 73.8%, respectively). Both high temperature regimes induced metabolic depression, but ramping resulted in a greater amount of energy assimilated (278.9 ± 175.4 J g-1 day-1) and higher energy efficiency for growth (89.8%) than constant exposure to 30 °C (115.4 ± 63.4 J g-1 day-1, 65.3%, respectively). Gradually increasing temperature allowed physiological mechanisms of thermal adjustment to take place, reflecting the capacity of juvenile H. erectus to respond to environmental change. Despite its advantage, this capacity is limited in time, since the cumulative effect of thermal exposure affected metabolic performance, eventually compromising survival. The study of seahorse response to thermal variations in the context of ocean warming needs to consider the temporal elements of thermal exposure to foresee its vulnerability under future scenarios.
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Affiliation(s)
- M Mascaró
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias, Universidad Nacional Autónoma de México, Puerto de abrigo s/n Sisal, Yucatán, Mexico; Laboratorio Nacional de Resiliencia Costera Laboratorios Nacionales, CONACYT, Mexico City, Mexico
| | - J L Horta
- Posgrado en Ciencias del Mar y Limnología, Facultad de Ciencias, Universidad Nacional Autónoma de México, Puerto de abrigo s/n Sisal, Yucatán, Mexico
| | - F Diaz
- Laboratorio de Ecofisiología de Organismos Acuáticos, Departamento de Biotecnología Marina, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Carretera Ensenada-Tijuana # 3918, Ensenada, Baja California, Mexico
| | - K Paschke
- Instituto de Acuicultura, Universidad Austral de Chile, Los Pinos s/n Balneario Pelluco, Puerto Montt, Chile
| | - C Rosas
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias, Universidad Nacional Autónoma de México, Puerto de abrigo s/n Sisal, Yucatán, Mexico; Laboratorio Nacional de Resiliencia Costera Laboratorios Nacionales, CONACYT, Mexico City, Mexico
| | - N Simões
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias, Universidad Nacional Autónoma de México, Puerto de abrigo s/n Sisal, Yucatán, Mexico; Laboratorio Nacional de Resiliencia Costera Laboratorios Nacionales, CONACYT, Mexico City, Mexico; International Chair for Coastal and Marine Studies, Harte Research Institute for Gulf of Mexico Studies, Texas A&M University, Corpus Christi, Texas, USA.
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Domingues P, Hernández-Urcera J, Cal R, Olivares A, Chimal M, Sánchez A, Rosas C, Gallardo P. Effect of triploidy on digestive enzyme activity of early stages of turbot (Scophthalmus maximus). Fish Physiol Biochem 2019; 45:573-582. [PMID: 30762186 DOI: 10.1007/s10695-019-00610-z] [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] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 01/18/2019] [Indexed: 06/09/2023]
Abstract
In the present work, growth and digestive enzyme activities of total acid and alkaline proteases, pepsin, trypsin, lipase, and α-amylase, as well as partial characterization of enzyme activity, were studied in diploid and triploid turbot. Growth was similar between both groups. Acid protease activity increased consistently during the experiment, for both diploid (2n) and triploid (3n) fish. The alkaline protease activity was always higher for triploids throughout the experiment. Proteolytic acid activity (pH 2) was generally higher for diploids, at all temperatures tested. Higher activity was at pH 2 and 3 for 2n and 3n fish, respectively. Regarding temperature, acid and alkaline protease activity was higher at 37 °C and 60 °C, respectively, for both groups. The general increase in pancreatic enzymes (trypsin and amylase) before 35 days after hatching (DAH) and posterior decrease until 60 DAH. There was a marked effect on enzyme activity when changing from live prey to pellets (35 DAH), especially on triploids.
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Affiliation(s)
- P Domingues
- Instituto Español de Oceanografía (IEO), Centro Oceanográfico de Vigo, 36280, Spain
| | - J Hernández-Urcera
- Department of Ecology and Marine Resources, Marine Research Institute (CSIC), Vigo, Spain
| | - R Cal
- Instituto Español de Oceanografía (IEO), Centro Oceanográfico de Vigo, 36280, Spain
| | - A Olivares
- Facultad Ciencias del Mar y Recursos Biológicos, Universidad de Antofagasta, Antofagasta, Chile
| | - M Chimal
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias UNAM, Puerto de Abrigo s/n, Sisal, Yucatán, Mexico
| | - A Sánchez
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias UNAM, Puerto de Abrigo s/n, Sisal, Yucatán, Mexico
| | - C Rosas
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias UNAM, Puerto de Abrigo s/n, Sisal, Yucatán, Mexico
| | - P Gallardo
- Unidad Multidisciplinaria de Docencia e Investigación, Facultad de Ciencias UNAM, Puerto de Abrigo s/n, Sisal, Yucatán, Mexico.
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Tolcher A, Fang D, Li Y, Tang Y, Ji J, Wang H, Karim R, Rosas C, Huang Y, Zhai Y. A phase Ib/II study of APG-115 in combination with pembrolizumab in patients with unresectable or metastatic melanomas or advanced solid tumors. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Abstract
Hyperandrogenemia, hyperinsulinemia, and obesity affect 60-70% of patients with Polycystic Ovarian Syndrome (PCOS), who exhibit an altered endometrial insulin signaling. The aim of the study was to evaluate whether hyperandrogenism, hyperinsulinism, and obesity present in PCOS patients impair the endometrial adiponectin signaling pathway. The ex vivo study was conducted on 27 samples from lean (n=9), obese (n=9), and obese-PCOS (n=9) patients. The in vitro assays were performed in immortalized human endometrial stromal cells stimulated with testosterone, insulin, or testosterone plus insulin. Serum steroid-hormones, adiponectin, glucose, and insulin; body mass index, free androgen index, ISI-Composite, and HOMA were evaluated in the 3 groups. Ex vivo and in vitro gene expression and protein content of adiponectin, AdipoR1, AdipoR2, and APPL1 were determined. Adiponectin serum levels were decreased in obese-PCOS patients compared to lean (78%) and obese (54%) controls (p<0.05). AdipoR1 protein and gene expression were increased in obese group vs. obese-PCOS and lean groups (2-fold, p<0.05). In turn, AdipoR2 protein and mRNA content was similar between the 3 groups. APPL1 protein levels were reduced in endometria from both obese groups, compared to lean group (6-fold, p<0.05). Testosterone plus insulin stimulation of T-HESC and St-T1b leads to a reduction of adiponectin, AdipoR1, AdipoR2, and APPL1 protein content in both endometrial cell lines (p<0.05), whereas, in the presence of testosterone or insulin alone, protein levels were similar to basal. Therefore, endometrial adiponectin-signaling pathway is impaired in hyperandrogenemic and hyperinsulinemic obese-PCOS patients, corroborated in the in vitro model, which could affect endometrial function and potentially the implantation process.
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Affiliation(s)
- V García
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - L Oróstica
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - C Poblete
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - C Rosas
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - I Astorga
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - C Romero
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
| | - M Vega
- Laboratory of Endocrinology and Reproductive Biology, University of Chile Clinical Hospital, Santiago, Chile
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Iglesias RR, Pevsner D, Rosas C, Sacchero D. High-resolution spatial phenotyping of fibre diameter and staple length over Corriedale sheep fleeces. Small Rumin Res 2013. [DOI: 10.1016/j.smallrumres.2013.02.001] [Citation(s) in RCA: 4] [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] [Indexed: 11/24/2022]
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Rosas C, Gabler F, Vantman D, Romero C, Vega M. Levels of Rabs and WAVE family proteins associated with translocation of GLUT4 to the cell surface in endometria from hyperinsulinemic PCOS women. Hum Reprod 2010; 25:2870-7. [DOI: 10.1093/humrep/deq232] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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Franco D, Rosas C, Rice CM, Ho DD. P17-15. Immunogenicity studies of chimeric yellow fever 17D viruses carrying HIV-1 p24 antigen. Retrovirology 2009. [PMCID: PMC2767800 DOI: 10.1186/1742-4690-6-s3-p297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
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Rosas C, Cuzon G, Gaxiola G, Le Priol Y, Pascual C, Rossignyol J, Contreras F, Sanchez A, Van Wormhoudt A. Metabolism and growth of juveniles of Litopenaeus vannamei: effect of salinity and dietary carbohydrate levels. J Exp Mar Biol Ecol 2001; 259:1-22. [PMID: 11325374 DOI: 10.1016/s0022-0981(01)00222-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The present study was designed to understand how carbohydrate (CBH) and protein metabolism are related in the penaeid shrimp Litopenaeus vannamei. With this information, we obtained a comprehensive schedule of the protein-carbohydrate metabolism including enzymatic, energetic, and functional aspects. We used salinity to determine its role as a modulator of the protein-carbohydrate metabolism in shrimp. Two experiments were designed. The first experiment evaluated the effect of CBH-salinity combinations in growth and survival, and hemolymph glucose, protein, and ammonia levels, digestive gland glycogen, osmotic pressure, and glutamate dehydrogenase (GDH) of L. vannamei juveniles acclimated during 18 days at a salinity of 15 per thousand and 40 per thousand. The second experiment was done to evaluate the effect of dietary CBH level on pre- and postprandial oxygen consumption, ammonia excretion, and the oxygen-nitrogen ratio (O/N) of juvenile L. vannamei in shrimps acclimated at 40 per thousand salinity. We also evaluated the ability of shrimp to carbohydrate adaptation. We made phosphoenolpyruvate carboxykinase (PECPK) and hexokinase activity measurements after a change in dietary carbohydrate levels at different times during 10 days. The growth rate depended on the combination salinity-dietary CBH-protein level. The maximum growth rate was obtained in shrimps maintained at 15 per thousand salinity and with a diet containing low CBH and high protein. The protein in hemolymph is related to the dietary protein levels; high dietary protein levels produced a high protein concentration in hemolymph. This suggests hemolymph is able to store proteins after a salinity acclimation. Depending on the salinity, the hemolymph proteins could be used as a source of osmotic effectors or as metabolic energy. The O/N values obtained show that shrimp used proteins as a source of energy, mainly when shrimps were fed with low CBH. The role played by postprandial nitrogen excretion (PPNE) in apparent heat increase (AHI) (PPNE/AHI ratio) is lower in shrimps fed diets containing high CBH in comparison with shrimps fed diets containing low CBH levels. These results confirm that the metabolism of L. vannamei juveniles is controlled by dietary protein levels, affecting the processes involved in the mechanical and biochemical transformations of ingested food. A growth depression effect was observed in shrimps fed with low-CBH protein diets and maintained in 40 per thousand salinity. In these shrimps, the hemolymph ammonia concentration (HAC) was significantly higher than that observed in shrimps fed with low CBH and maintained in 15 per thousand salinity. That high HAC level coincided with lower growth rate, which suggests that this level might be toxic for juveniles of L. vannamei. Results obtained for GDH activity showed this enzyme regulated both HAC and hemolymph protein levels, with high values in shrimps fed with low CBH levels and maintained in 40 per thousand salinity, and lower in shrimps fed with high CBH and maintained in 15 per thousand salinity. These differences mean that shrimp with a high-gill GDH activity might waste more energy in oxidation of the excess proteins and amino acids, reducing the energy for growth. It was evident that L. vannamei can convert protein to glycogen by a gluconeogenic pathway, which permitted shrimp to maintain a minimum circulating glucose of 0.34 mg/ml in hemolymph. A high PECPK activity was observed in shrimps fed a diet containing low CBH level indicating that the gluconeogenic pathway is activated, as in vertebrates by low dietary CBH levels. After a change in diet, we observed a change in PEPCK; however, it was lower and seems to depend on the way of adaptation, because it occurred after 6 days when adapting to a high-CBH diet and with little change for the low-CBH diet.
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Affiliation(s)
- C Rosas
- Grupo de Biología Marina Experimental, Laboratorio de Ecofisiología, Facultad de Ciencias, UNAM, Apdo. Post. 69, Cd. del Carmen, Campeche, Mexico
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Brito R, Chimal ME, Gaxiola G, Rosas C. Growth, metabolic rate, and digestive enzyme activity in the white shrimp Litopenaeus setiferus early postlarvae fed different diets. J Exp Mar Biol Ecol 2000; 255:21-36. [PMID: 11090850 DOI: 10.1016/s0022-0981(00)00287-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Growth rate, soluble-protein content, oxygen consumption, ammonia excretion, and digestive-enzyme activity were studied in Litopenaeus setiferus early postlarvae under four feeding regimens that included combinations of freshly hatched Artemia nauplii, microparticulate commercial diet, and algae. Growth and of postlarvae fed a mixed diet were significantly higher. Artificial diet used alone caused the lowest growth, lowest soluble-protein content, higher ammonia excretion, lowest O:N ratio, and higher proteolytic and amylase activities. The artificial diet stimulated proteolytic activity and ammonia excretion of postlarvae, apparently in response to some deficiency in protein composition of the diet. Based on results in growth, soluble-protein content, enzymatic activity, and metabolic substrate, we determined that partial substitution of Artemia nauplii by artificial diet, with or without addition of algae when rearing early postlarval stages, will benefit the growth and nutritional state of L. setiferus postlarvae.
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Affiliation(s)
- R Brito
- Center of Marine Research, Havana University, Havana, Cuba
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Rosas C, Cuzon G, Gaxiola G, Arena L, Lemaire P, Soyez C. Influence of dietary carbohydrate on the metabolism of juvenile Litopenaeus stylirostris. J Exp Mar Biol Ecol 2000; 249:181-198. [PMID: 10841934 DOI: 10.1016/s0022-0981(00)00184-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The effect of dietary carbohydrates (CBH) on glucose and glycogen, digestive enzymes, ammonia excretion and osmotic pressure and osmotic capacity of Litopenaeus stylirostris juveniles was studied. The increase of CBH, ranging between 1 and 33%, stimulates activities of alpha-amylase and alpha-glucosidase in the hepatopancreas. High levels of glucose in hemolymph and of glycogen in the hepatopancreas were reached at the highest level of dietary CBH; however, the kinetics of accumulation is different. Shrimps fed with low level of CBH needed 3 h to reached glucose peak, whereas only 1 h is necessary for high CBH levels. A saturation curve was observed in glycogen level and alpha-amylase activity with maximum values in shrimp-fed diets containing 21% CBH. This level could be used to be included as a maximum shrimp dietary CBH level. Pre-prandial glycogen levels were observed in shrimp fed a diet containing 1% CBH, indicating an important gluconeogenesis, which affected the protein metabolism. The present results show that a diet containing 10% CBH may not be enough to cover the CBH requirement, which could be satisfied by dietary protein content. The low osmotic capacity observed in shrimp fed on a diet containing 10% CBH coincided with a relatively low post-prandial nitrogen excretion which reflects a low concentration of amino acids circulating in hemolymph, which affected the osmotic pressure and the osmotic capacity. These results reflect the high plasticity of shrimp species to use protein to obtain metabolic energy from food and its limited capacity for processing dietary CBH.
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Affiliation(s)
- C Rosas
- Grupo de Biología Marina Experimental, Laboratorio de Ecofisiología, Fac. de Ciencias, UNAM, Apdo. Post. 69, Cd. del Carmen, Campeche, Mexico
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Rosas C, La Cava JE, Braslavsky G, Fauceglia D, Aziz H, Imventarza O. Evaluation of the results of surgical psychoprophylaxis in liver transplant recipients at low psychosocial risk. Transplant Proc 1999; 31:3057. [PMID: 10578392 DOI: 10.1016/s0041-1345(99)00669-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- C Rosas
- Liver Transplant Unit, Hospital Dr. Cosme Argerich, Buenos Aires, Argentina
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Affiliation(s)
- G Braslavsky
- Liver Transplant Unit, Hospital Dr Cosme Argerich, Buenos Aires, Argentina
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Rosas C, Bolongaro-Crevenna A, Sanchez A, Gaxiola G, Soto L, Escobar E. Role of Digestive Gland in the Energetic Metabolism of Penaeus setiferus. Biol Bull 1995; 189:168-174. [PMID: 27768481 DOI: 10.2307/1542467] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We determined the role of the digestive gland in the respiratory metabolism of Penaeus setiferus adult males as a step toward proposing a feeding schedule based on the cycle of activity in the digestive gland. We measured pre- and postprandial values for oxygen consumption rate and hemolymph glucose concentrations in live animals, and oxygen consumption rate and glycogen concentration in excised digestive gland. After the animals were fed, which enhanced general metabolic activity, these indices changed. There was a high correlation between the oxygen consumption rate of the animal and the glucose concentration in the hemolymph, and between the oxygen consumption rate by the digestive gland and the glycogen concentration in the digestive gland, all in relation to time after feeding. Correlations support the hypothesis that the energy demand depends upon the metabolic substrate concentration. In this theory, glucose sustains muscle activity (during ingestion of food) and glycogen is the product of the digestive gland during food assimilation. Our observations of metabolic dynamics during the feeding period allowed us to examine the feeding process. The metabolic activity of the digestive gland was highest 6 h after feeding. This could mean that assimilation, having started 2 h after food intake, peaked 6 h after feeding. Eight hours after feeding, the oxygen consumption rate of the digestive gland decreased and fell to values similar to those recorded for animals subjected to 72 h of fasting.
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Suárez S, Rosas C, Latorre G, Egas G. [Diabetic woman with arterial hypertension, hypercholesterolemia, and trigeminal neuralgia. Transitional type meningioma and fibroblastic predominance]. Rev Clin Esp 1994; 194:26-7. [PMID: 8153411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- S Suárez
- Servicio de Medicina Interna, Hospital El Sabinal, Las Palmas de Gran Canaria
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Rosas C, Ramirez P. Effect of chromium and cadmium on the thermal tolerance of the prawn Macrobrachium rosenbergii exposed to hard and soft water. Bull Environ Contam Toxicol 1993; 51:568-574. [PMID: 8400660 DOI: 10.1007/bf00192174] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- C Rosas
- Depto. Biología, Fac. de Ciencias, UNAM, México D.F., Mexico
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Alcaraz G, Rosas C, Espina S. Effect of detergent on the response to temperature and growth of grass carp, Ctenopharyngodon idella. Bull Environ Contam Toxicol 1993; 50:659-664. [PMID: 8387840 DOI: 10.1007/bf00194659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- G Alcaraz
- Department of Biology, Faculty of Science, National Autonomous University of Mexico, D.F
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Rojas E, Brown E, Rosas C, Scorza JV. Populations of larvae of anopheles spp. in natural breeding sites in western Venezuela, an area of refractory malaria. Rev Saude Publica 1992; 26:336-42. [PMID: 1342523 DOI: 10.1590/s0034-89101992000500007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Studies have been undertaken into on the diversity and relative abundance of larvae of Anopheles (Nyssorhynchus) spp. in 22 permanent or temporary pools in an area of 70 km2 in the eastern piedmont of the Venezuela Andes, between the mountains and the plains, an area in which malaria is refractory and A. nuñeztovari is present. Twelve species were identified, the most frequent, abundant and sympatric being A. triannulatus, A. albitarsis, A. nuñeztovari, A. oswaldoi and A. strodei. The samples from the permanent pools showed greater diversity of species and greater numbers of larvae than the samples from the temporary pools. The existence of the same larval associations in pools of other localities in the eastern piedmont of the Venezuelan Andes suggests the possibility of the making an ecological map of the breeding sites of A. nuñeztovari and for these anophelines in a region extending for 430 km.
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Affiliation(s)
- E Rojas
- Centro de Investigacions José W. Torrealba, Trujillo, Venezuela
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Wilson MG, Zaror L, Rosas C. [Microbiological study of urethritis in men]. Rev Med Chil 1986; 114:742-7. [PMID: 3107104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Abstract
Two children with spinal dermal sinuses of congenital origin are described. They are unusual because the skin dimples were located off the midline at the gluteal region.
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Abstract
A case is presented of a child with an arteriovenous fistula and a giant aneurysm located beside the brain stem under the right temporal lobe. It was successfully treated by clipping its feeding artery, a branch of the right posterior cerebral artery. The similarities to, and the differences from, aneurysms of the vein of Galen are discussed.
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Sosa Enríguez M, Betancor León P, Rosas C, Navarro MC. [Multiple sclerosis in the province of Las Palmas]. Arch Neurobiol (Madr) 1983; 46:161-6. [PMID: 6639275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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