1
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Reyes JM, Tovy A, Zhang L, Bortoletto AS, Rosas C, Chen CW, Waldvogel SM, Guzman AG, Aguilar R, Gupta S, Liu L, Buckley MT, Patel KR, Marcogliese AN, Li Y, Curry CV, Rando T, Brunet A, Parchem RJ, Rau RE, Goodell MA. Hematologic DNMT3A reduction and high-fat diet synergize to promote weight gain and tissue inflammation. iScience 2024; 27:109122. [PMID: 38414863 PMCID: PMC10897855 DOI: 10.1016/j.isci.2024.109122] [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: 07/14/2022] [Revised: 12/11/2023] [Accepted: 01/31/2024] [Indexed: 02/29/2024] Open
Abstract
During aging, blood cell production becomes dominated by a limited number of variant hematopoietic stem cell (HSC) clones. Differentiated progeny of variant HSCs are thought to mediate the detrimental effects of such clonal hematopoiesis on organismal health, but the mechanisms are poorly understood. While somatic mutations in DNA methyltransferase 3A (DNMT3A) frequently drive clonal dominance, the aging milieu also likely contributes. Here, we examined in mice the interaction between high-fat diet (HFD) and reduced DNMT3A in hematopoietic cells; strikingly, this combination led to weight gain. HFD amplified pro-inflammatory pathways and upregulated inflammation-associated genes in mutant cells along a pro-myeloid trajectory. Aberrant DNA methylation during myeloid differentiation and in response to HFD led to pro-inflammatory activation and maintenance of stemness genes. These findings suggest that reduced DNMT3A in hematopoietic cells contributes to weight gain, inflammation, and metabolic dysfunction, highlighting a role for DNMT3A loss in the development of metabolic disorders.
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Affiliation(s)
- Jaime M Reyes
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Ayala Tovy
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Linda Zhang
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Graduate Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX, USA
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, USA
| | - Angelina S Bortoletto
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Graduate Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX, USA
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, USA
| | - Carina Rosas
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Chun-Wei Chen
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Sarah M Waldvogel
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Cancer and Cell Biology Graduate Program, Baylor College of Medicine, Houston, TX, USA
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, USA
| | - Anna G Guzman
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Rogelio Aguilar
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, USA
| | - Sinjini Gupta
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Ling Liu
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
- Paul F. Glenn Center for the Biology of Aging, Stanford University, Palo Alto, CA, USA
| | | | - Kalyani R Patel
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, USA
| | - Andrea N Marcogliese
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, USA
| | - Yumei Li
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Choladda V Curry
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, USA
| | - Thomas Rando
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
- Paul F. Glenn Center for the Biology of Aging, Stanford University, Palo Alto, CA, USA
| | - Anne Brunet
- Department of Genetics, Stanford University, Palo Alto, CA, USA
- Paul F. Glenn Center for the Biology of Aging, Stanford University, Palo Alto, CA, USA
| | - Ronald J Parchem
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Rachel E Rau
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, USA
| | - Margaret A Goodell
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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2
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Hong T, Li J, Guo L, Cavalier M, Wang T, Dou Y, DeLaFuente A, Fang S, Guzman A, Wohlan K, Kapadia C, Rosas C, Yang Y, Yin CC, Li S, You MJ, Cheng X, Goodell MA, Zhou Y, Huang Y. TET2 modulates spatial relocalization of heterochromatin in aged hematopoietic stem and progenitor cells. Nat Aging 2023; 3:1387-1400. [PMID: 37884767 DOI: 10.1038/s43587-023-00505-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 09/21/2023] [Indexed: 10/28/2023]
Abstract
DNA methylation deregulation at partially methylated domains (PMDs) represents an epigenetic signature of aging and cancer, yet the underlying molecular basis and resulting biological consequences remain unresolved. We report herein a mechanistic link between disrupted DNA methylation at PMDs and the spatial relocalization of H3K9me3-marked heterochromatin in aged hematopoietic stem and progenitor cells (HSPCs) or those with impaired DNA methylation. We uncover that TET2 modulates the spatial redistribution of H3K9me3-marked heterochromatin to mediate the upregulation of endogenous retroviruses (ERVs) and interferon-stimulated genes (ISGs), hence contributing to functional decline of aged HSPCs. TET2-deficient HSPCs retain perinuclear distribution of heterochromatin and exhibit age-related clonal expansion. Reverse transcriptase inhibitors suppress ERVs and ISGs expression, thereby restoring age-related defects in aged HSPCs. Collectively, our findings deepen the understanding of the functional interplay between DNA methylation and histone modifications, which is vital for maintaining heterochromatin function and safeguarding genome stability in stem cells.
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Affiliation(s)
- Tingting Hong
- Institute of Biosciences and Technology, Texas A&M University, Houston, TX, USA
| | - Jia Li
- Institute of Biosciences and Technology, Texas A&M University, Houston, TX, USA.
- State Key Laboratory of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China.
| | - Lei Guo
- Institute of Biosciences and Technology, Texas A&M University, Houston, TX, USA
| | - Maryn Cavalier
- Institute of Biosciences and Technology, Texas A&M University, Houston, TX, USA
| | - Tianlu Wang
- Institute of Biosciences and Technology, Texas A&M University, Houston, TX, USA
| | - Yaling Dou
- Institute of Biosciences and Technology, Texas A&M University, Houston, TX, USA
| | - Aaron DeLaFuente
- Institute of Biosciences and Technology, Texas A&M University, Houston, TX, USA
| | - Shaohai Fang
- Institute of Biosciences and Technology, Texas A&M University, Houston, TX, USA
| | - Anna Guzman
- Department of Molecular Cell Biology, Baylor College of Medicine, Houston, TX, USA
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
| | - Katherina Wohlan
- Department of Molecular Cell Biology, Baylor College of Medicine, Houston, TX, USA
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
| | - Chiraag Kapadia
- Department of Molecular Cell Biology, Baylor College of Medicine, Houston, TX, USA
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
| | - Carina Rosas
- Department of Molecular Cell Biology, Baylor College of Medicine, Houston, TX, USA
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
| | - Yaling Yang
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - C Cameron Yin
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Shaoying Li
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - M James You
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Xiaodong Cheng
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Margaret A Goodell
- Department of Molecular Cell Biology, Baylor College of Medicine, Houston, TX, USA
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
| | - Yubin Zhou
- Institute of Biosciences and Technology, Texas A&M University, Houston, TX, USA.
- Department of Translational Medical Sciences, School of Medicine, Texas A&M University, Houston, TX, USA.
| | - Yun Huang
- Institute of Biosciences and Technology, Texas A&M University, Houston, TX, USA.
- Department of Translational Medical Sciences, School of Medicine, Texas A&M University, Houston, TX, USA.
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3
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Ramabadran R, Wang JH, Reyes JM, Guzman AG, Gupta S, Rosas C, Brunetti L, Gundry MC, Tovy A, Long H, Gu T, Cullen SM, Tyagi S, Rux D, Kim JJ, Kornblau SM, Kyba M, Stossi F, Rau RE, Takahashi K, Westbrook TF, Goodell MA. DNMT3A-coordinated splicing governs the stem state switch towards differentiation in embryonic and haematopoietic stem cells. Nat Cell Biol 2023; 25:528-539. [PMID: 37024683 PMCID: PMC10337578 DOI: 10.1038/s41556-023-01109-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 02/17/2023] [Indexed: 04/08/2023]
Abstract
Upon stimulation by extrinsic stimuli, stem cells initiate a programme that enables differentiation or self-renewal. Disruption of the stem state exit has catastrophic consequences for embryogenesis and can lead to cancer. While some elements of this stem state switch are known, major regulatory mechanisms remain unclear. Here we show that this switch involves a global increase in splicing efficiency coordinated by DNA methyltransferase 3α (DNMT3A), an enzyme typically involved in DNA methylation. Proper activation of murine and human embryonic and haematopoietic stem cells depends on messenger RNA processing, influenced by DNMT3A in response to stimuli. DNMT3A coordinates splicing through recruitment of the core spliceosome protein SF3B1 to RNA polymerase and mRNA. Importantly, the DNA methylation function of DNMT3A is not required and loss of DNMT3A leads to impaired splicing during stem cell turnover. Finally, we identify the spliceosome as a potential therapeutic target in DNMT3A-mutated leukaemias. Together, our results reveal a modality through which DNMT3A and the spliceosome govern exit from the stem state towards differentiation.
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Affiliation(s)
- Raghav Ramabadran
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Interdepartmental Program in Integrative Molecular and Biomedical Sciences, Baylor College of Medicine, Houston, TX, USA
| | - Jarey H Wang
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, USA
- Verna & Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Jaime M Reyes
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Anna G Guzman
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Sinjini Gupta
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Carina Rosas
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Lorenzo Brunetti
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
| | - Michael C Gundry
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Ayala Tovy
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Hali Long
- Interdepartmental Program in Integrative Molecular and Biomedical Sciences, Baylor College of Medicine, Houston, TX, USA
| | - Tianpeng Gu
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Sean M Cullen
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, USA
| | - Siddhartha Tyagi
- Verna & Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Danielle Rux
- Lillehei Heart Institute and Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - Jean J Kim
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
| | - Steven M Kornblau
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Michael Kyba
- Lillehei Heart Institute and Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA
| | - Fabio Stossi
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Rachel E Rau
- Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, USA
| | - Koichi Takahashi
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Thomas F Westbrook
- Verna & Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, USA
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
- Therapeutic Innovation Center, Baylor College of Medicine, Houston, TX, USA
| | - Margaret A Goodell
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA.
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA.
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4
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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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5
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Tovy A, Reyes JM, Zhang L, Huang YH, Rosas C, Daquinag AC, Guzman A, Ramabadran R, Chen CW, Gu T, Gupta S, Ortinau L, Park D, Cox AR, Rau RE, Hartig SM, Kolonin MG, Goodell MA. Constitutive loss of DNMT3A causes morbid obesity through misregulation of adipogenesis. eLife 2022; 11:e72359. [PMID: 35635747 PMCID: PMC9150890 DOI: 10.7554/elife.72359] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 05/10/2022] [Indexed: 11/13/2022] Open
Abstract
DNA Methyltransferase 3 A (DNMT3A) is an important facilitator of differentiation of both embryonic and hematopoietic stem cells. Heterozygous germline mutations in DNMT3A lead to Tatton-Brown-Rahman Syndrome (TBRS), characterized by obesity and excessive height. While DNMT3A is known to impact feeding behavior via the hypothalamus, here we investigated a role in adipocyte progenitors utilizing heterozygous knockout mice that recapitulate cardinal TBRS phenotypes. These mice become morbidly obese due to adipocyte enlargement and tissue expansion. Adipose tissue in these mice exhibited defects in preadipocyte maturation and precocious activation of inflammatory gene networks, including interleukin-6 signaling. Adipocyte progenitor cell lines lacking DNMT3A exhibited aberrant differentiation. Furthermore, mice in which Dnmt3a was specifically ablated in adipocyte progenitors showed enlarged fat depots and increased progenitor numbers, partly recapitulating the TBRS obesity phenotypes. Loss of DNMT3A led to constitutive DNA hypomethylation, such that the DNA methylation landscape of young adipocyte progenitors resemble that of older wild-type mice. Together, our results demonstrate that DNMT3A coordinates both the central and local control of energy storage required to maintain normal weight and prevent inflammatory obesity.
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Affiliation(s)
- Ayala Tovy
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
| | - Jaime M Reyes
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Human Genetics, Baylor College of MedicineHoustonUnited States
| | - Linda Zhang
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
- Graduate Program in Translational Biology and Molecular Medicine, Baylor College of MedicineHoustonUnited States
| | - Yung-Hsin Huang
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
| | - Carina Rosas
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
| | - Alexes C Daquinag
- Institute of Molecular Medicine, McGovern Medical School at the University of Texas Health Science CenterHoustonUnited States
| | - Anna Guzman
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
| | - Raghav Ramabadran
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
| | - Chun-Wei Chen
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Human Genetics, Baylor College of MedicineHoustonUnited States
| | - Tianpeng Gu
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
| | - Sinjini Gupta
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
| | - Laura Ortinau
- Department of Molecular and Human Genetics, Baylor College of MedicineHoustonUnited States
- Center for Metabolic and Degenerative Disease, Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center at HoustonHoustonUnited States
| | - Dongsu Park
- Department of Molecular and Human Genetics, Baylor College of MedicineHoustonUnited States
- Center for Metabolic and Degenerative Disease, Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center at HoustonHoustonUnited States
| | - Aaron R Cox
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Baylor College of MedicineHoustonUnited States
| | - Rachel E Rau
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
- Department of Pediatrics, Baylor College of Medicine and Texas Children's HospitalHoustonUnited States
| | - Sean M Hartig
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Baylor College of MedicineHoustonUnited States
| | - Mikhail G Kolonin
- Graduate Program in Translational Biology and Molecular Medicine, Baylor College of MedicineHoustonUnited States
| | - Margaret A Goodell
- Stem Cells and Regenerative Medicine Center, Baylor College of MedicineHoustonUnited States
- Department of Molecular and Cellular Biology, Baylor College of MedicineHoustonUnited States
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6
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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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7
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Tovy A, Rosas C, Gaikwad AS, Medrano G, Zhang L, Reyes JM, Huang YH, Arakawa T, Kurtz K, Conneely SE, Guzman AG, Aguilar R, Gao A, Chen CW, Kim JJ, Carter MT, Lasa-Aranzasti A, Valenzuela I, Van Maldergem L, Brunetti L, Hicks MJ, Marcogliese AN, Goodell MA, Rau RE. Perturbed hematopoiesis in individuals with germline DNMT3A overgrowth Tatton-Brown-Rahman syndrome. Haematologica 2021; 107:887-898. [PMID: 34092059 PMCID: PMC8968878 DOI: 10.3324/haematol.2021.278990] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Indexed: 12/02/2022] Open
Abstract
Tatton-Brown-Rahman syndrome (TBRS) is an overgrowth disorder caused by germline heterozygous mutations in the DNA methyltransferase DNMT3A. DNMT3A is a critical regulator of hematopoietic stem cell (HSC) differentiation and somatic DNMT3A mutations are frequent in hematologic malignancies and clonal hematopoiesis. Yet, the impact of constitutive DNMT3A mutation on hematopoiesis in TBRS is undefined. In order to establish how constitutive mutation of DNMT3A impacts blood development in TBRS we gathered clinical data and analyzed blood parameters in 18 individuals with TBRS. We also determined the distribution of major peripheral blood cell lineages by flow cytometric analyses. Our analyses revealed non-anemic macrocytosis, a relative decrease in lymphocytes and increase in neutrophils in TBRS individuals compared to unaffected controls. We were able to recapitulate these hematologic phenotypes in multiple murine models of TBRS and identified rare hematological and non-hematological malignancies associated with constitutive Dnmt3a mutation. We further show that loss of DNMT3A in TBRS is associated with an altered DNA methylation landscape in hematopoietic cells affecting regions critical to stem cell function and tumorigenesis. Overall, our data identify key hematopoietic effects driven by DNMT3A mutation with clinical implications for individuals with TBRS and DNMT3A-associated clonal hematopoiesis or malignancies.
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Affiliation(s)
- Ayala Tovy
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX
| | - Carina Rosas
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX
| | - Amos S Gaikwad
- Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX
| | - Geraldo Medrano
- Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX
| | - Linda Zhang
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA; Graduate Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX
| | - Jaime M Reyes
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX
| | - Yung-Hsin Huang
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX
| | - Tastuhiko Arakawa
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX
| | - Kristen Kurtz
- Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX
| | - Shannon E Conneely
- Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX
| | - Anna G Guzman
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX
| | - Rogelio Aguilar
- Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX
| | - Anne Gao
- Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX
| | - Chun-Wei Chen
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA; Graduate Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX
| | - Jean J Kim
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA; Department of Education, Innovation and Technology, Baylor College of Medicine, Houston, TX
| | - Melissa T Carter
- Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, ON, Canada
| | - Amaia Lasa-Aranzasti
- Department of Clinical and Molecular Genetics, Vall d'Hebron University Hospital and Medicine Genetics Group, Vall d'Hebron Research Institute, Barcelona
| | - Irene Valenzuela
- Department of Clinical and Molecular Genetics, Vall d'Hebron University Hospital and Medicine Genetics Group, Vall d'Hebron Research Institute, Barcelona
| | - Lionel Van Maldergem
- Centre de Génétique Humaine and Integrative and Cognitive Neuroscience Research Unit EA481, University of Franche-Comté, Besancon, France
| | - Lorenzo Brunetti
- Department of Medicine and Surgery, University of Perugia, Perugia
| | - M John Hicks
- Department of Pathology Texas Children's Hospital and Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX
| | - Andrea N Marcogliese
- Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX
| | - Margaret A Goodell
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA; Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, USA; Graduate Program in Translational Biology and Molecular Medicine, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA; Department of Education, Innovation and Technology, Baylor College of Medicine, Houston, TX.
| | - Rachel E Rau
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX.
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Tovy A, Reyes JM, Gundry MC, Brunetti L, Lee-Six H, Petljak M, Park HJ, Guzman AG, Rosas C, Jeffries AR, Baple E, Mill J, Crosby AH, Sency V, Xin B, Machado HE, Castillo D, Weitzel JN, Li W, Stratton MR, Campbell PJ, Wang H, Sanders MA, Goodell MA. Tissue-Biased Expansion of DNMT3A-Mutant Clones in a Mosaic Individual Is Associated with Conserved Epigenetic Erosion. Cell Stem Cell 2020; 27:326-335.e4. [PMID: 32673568 DOI: 10.1016/j.stem.2020.06.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 04/10/2020] [Accepted: 06/22/2020] [Indexed: 12/22/2022]
Abstract
DNA methyltransferase 3A (DNMT3A) is the most commonly mutated gene in clonal hematopoiesis (CH). Somatic DNMT3A mutations arise in hematopoietic stem cells (HSCs) many years before malignancies develop, but difficulties in comparing their impact before malignancy with wild-type cells have limited the understanding of their contributions to transformation. To circumvent this limitation, we derived normal and DNMT3A mutant lymphoblastoid cell lines from a germline mosaic individual in whom these cells co-existed for nearly 6 decades. Mutant cells dominated the blood system, but not other tissues. Deep sequencing revealed similar mutational burdens and signatures in normal and mutant clones, while epigenetic profiling uncovered the focal erosion of DNA methylation at oncogenic regulatory regions in mutant clones. These regions overlapped with those sensitive to DNMT3A loss after DNMT3A ablation in HSCs and in leukemia samples. These results suggest that DNMT3A maintains a conserved DNA methylation pattern, the erosion of which provides a distinct competitive advantage to hematopoietic cells.
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Affiliation(s)
- Ayala Tovy
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Jaime M Reyes
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Michael C Gundry
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Lorenzo Brunetti
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA
| | - Henry Lee-Six
- Cancer, Ageing, and Somatic Mutation, Wellcome Sanger Institute, Hinxton, UK
| | - Mia Petljak
- Cancer, Ageing, and Somatic Mutation, Wellcome Sanger Institute, Hinxton, UK
| | - Hyun Jung Park
- Division of Biostatistics, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - Anna G Guzman
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Carina Rosas
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
| | - Aaron R Jeffries
- RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation Trust, Exeter, UK
| | - Emma Baple
- RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation Trust, Exeter, UK
| | - Jonathan Mill
- RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation Trust, Exeter, UK
| | - Andrew H Crosby
- RILD Wellcome Wolfson Centre, University of Exeter, Royal Devon & Exeter NHS Foundation Trust, Exeter, UK
| | - Valerie Sency
- DDC Clinic Center for Special Needs Children, Middlefield, OH, USA; Department of Pediatrics, Rainbow Babies & Children's Hospital, Cleveland, OH, USA; Department of Molecular Cardiology, Cleveland Clinic, Cleveland, OH, USA
| | - Baozhong Xin
- DDC Clinic Center for Special Needs Children, Middlefield, OH, USA; Department of Pediatrics, Rainbow Babies & Children's Hospital, Cleveland, OH, USA; Department of Molecular Cardiology, Cleveland Clinic, Cleveland, OH, USA
| | - Heather E Machado
- Cancer, Ageing, and Somatic Mutation, Wellcome Sanger Institute, Hinxton, UK
| | | | | | - Wei Li
- Division of Biostatistics, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - Michael R Stratton
- Cancer, Ageing, and Somatic Mutation, Wellcome Sanger Institute, Hinxton, UK
| | - Peter J Campbell
- Cancer, Ageing, and Somatic Mutation, Wellcome Sanger Institute, Hinxton, UK
| | - Heng Wang
- DDC Clinic Center for Special Needs Children, Middlefield, OH, USA; Department of Pediatrics, Rainbow Babies & Children's Hospital, Cleveland, OH, USA; Department of Molecular Cardiology, Cleveland Clinic, Cleveland, OH, USA
| | - Mathijs A Sanders
- Cancer, Ageing, and Somatic Mutation, Wellcome Sanger Institute, Hinxton, UK; Department of Hematology, Erasmus University Medical Center, Rotterdam, the Netherlands.
| | - Margaret A Goodell
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA; Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA.
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Zhang X, Wang X, Wang XQD, Su J, Putluri N, Zhou T, Qu Y, Jeong M, Guzman A, Rosas C, Huang Y, Sreekumar A, Li W, Goodell MA. Dnmt3a loss and Idh2 neomorphic mutations mutually potentiate malignant hematopoiesis. Blood 2020; 135:845-856. [PMID: 31932841 PMCID: PMC7068035 DOI: 10.1182/blood.2019003330] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 12/11/2019] [Indexed: 12/12/2022] Open
Abstract
Mutations in the epigenetic regulators DNMT3A and IDH1/2 co-occur in patients with acute myeloid leukemia and lymphoma. In this study, these 2 epigenetic mutations cooperated to induce leukemia. Leukemia-initiating cells from Dnmt3a-/- mice that express an IDH2 neomorphic mutant have a megakaryocyte-erythroid progenitor-like immunophenotype, activate a stem-cell-like gene signature, and repress differentiated progenitor genes. We observed an epigenomic dysregulation with the gain of repressive H3K9 trimethylation and loss of H3K9 acetylation in diseased mouse bone marrow hematopoietic stem and progenitor cells (HSPCs). HDAC inhibitors rapidly reversed the H3K9 methylation/acetylation imbalance in diseased mouse HSPCs while reducing the leukemia burden. In addition, using targeted metabolomic profiling for the first time in mouse leukemia models, we also showed that prostaglandin E2 is overproduced in double-mutant HSPCs, rendering them sensitive to prostaglandin synthesis inhibition. These data revealed that Dnmt3a and Idh2 mutations are synergistic events in leukemogenesis and that HSPCs carrying both mutations are sensitive to induced differentiation by the inhibition of both prostaglandin synthesis and HDAC, which may reveal new therapeutic opportunities for patients carrying IDH1/2 mutations.
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Affiliation(s)
- Xiaotian Zhang
- Center for Epigenetics, Van Andel Research Institute, Grand Rapids, MI
- Department of Molecular and Human Genetics and
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX
| | - Xinyu Wang
- Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, China
| | | | - Jianzhong Su
- Institute of Biomedical Big Data, Wenzhou Medical University, Wenzhou, China
- Division of Biostatistics, Dan L. Duncan Cancer Center
- Department of Molecular and Cellular Biology, and
| | | | - Ting Zhou
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX
| | - Ying Qu
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden; and
| | - Mira Jeong
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX
| | - Anna Guzman
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX
| | - Carina Rosas
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX
| | - Yun Huang
- Health Science Center, Texas A&M University, Houston, TX
| | - Arun Sreekumar
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden; and
| | - Wei Li
- Division of Biostatistics, Dan L. Duncan Cancer Center
- Department of Molecular and Cellular Biology, and
| | - Margaret A Goodell
- Department of Molecular and Human Genetics and
- Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX
- Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX
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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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11
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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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13
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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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15
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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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17
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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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18
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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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19
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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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