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Harold KM, Matsuzaki S, Pranay A, Loveland BL, Batushansky A, Mendez Garcia MF, Eyster C, Stavrakis S, Chiao YA, Kinter M, Humphries KM. Loss of Cardiac PFKFB2 Drives Metabolic, Functional, and Electrophysiological Remodeling in the Heart. J Am Heart Assoc 2024; 13:e033676. [PMID: 38533937 DOI: 10.1161/jaha.123.033676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 02/20/2024] [Indexed: 03/28/2024]
Abstract
BACKGROUND Phosphofructo-2-kinase/fructose-2,6-bisphosphatase (PFK-2) is a critical glycolytic regulator responsible for upregulation of glycolysis in response to insulin and adrenergic signaling. PFKFB2, the cardiac isoform of PFK-2, is degraded in the heart in the absence of insulin signaling, contributing to diabetes-induced cardiac metabolic inflexibility. However, previous studies have not examined how the loss of PFKFB2 affects global cardiac metabolism and function. METHODS AND RESULTS To address this, we have generated a mouse model with a cardiomyocyte-specific knockout of PFKFB2 (cKO). Using 9-month-old cKO and control mice, we characterized the impacts of PFKFB2 on cardiac metabolism, function, and electrophysiology. cKO mice have a shortened life span of 9 months. Metabolically, cKO mice are characterized by increased glycolytic enzyme abundance and pyruvate dehydrogenase activity, as well as decreased mitochondrial abundance and beta oxidation, suggesting a shift toward glucose metabolism. This was supported by a decrease in the ratio of palmitoyl carnitine to pyruvate-dependent mitochondrial respiration in cKO relative to control animals. Metabolomic, proteomic, and Western blot data support the activation of ancillary glucose metabolism, including pentose phosphate and hexosamine biosynthesis pathways. Physiologically, cKO animals exhibited impaired systolic function and left ventricular dilation, represented by reduced fractional shortening and increased left ventricular internal diameter, respectively. This was accompanied by electrophysiological alterations including increased QT interval and other metrics of delayed ventricular conduction. CONCLUSIONS Loss of PFKFB2 results in metabolic remodeling marked by cardiac ancillary pathway activation. This could delineate an underpinning of pathologic changes to mechanical and electrical function in the heart.
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Affiliation(s)
- Kylene M Harold
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation Oklahoma City OK USA
- Department of Biochemistry and Molecular Physiology University of Oklahoma Health Sciences Center Oklahoma City OK USA
| | - Satoshi Matsuzaki
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation Oklahoma City OK USA
| | - Atul Pranay
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation Oklahoma City OK USA
| | - Brooke L Loveland
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation Oklahoma City OK USA
| | - Albert Batushansky
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation Oklahoma City OK USA
- Ilse Katz Institute for Nanoscale Science & Technology Ben-Gurion University of the Negev Beer Sheva Israel
| | - Maria F Mendez Garcia
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation Oklahoma City OK USA
| | - Craig Eyster
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation Oklahoma City OK USA
| | - Stavros Stavrakis
- Department of Medicine, Section of Cardiovascular Medicine University of Oklahoma Health Sciences Center Oklahoma City OK USA
| | - Ying Ann Chiao
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation Oklahoma City OK USA
- Department of Biochemistry and Molecular Physiology University of Oklahoma Health Sciences Center Oklahoma City OK USA
| | - Michael Kinter
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation Oklahoma City OK USA
| | - Kenneth M Humphries
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation Oklahoma City OK USA
- Department of Biochemistry and Molecular Physiology University of Oklahoma Health Sciences Center Oklahoma City OK USA
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Harold KM, Matsuzaki S, Pranay A, Loveland BL, Batushansky A, Mendez Garcia MF, Eyster C, Stavrakis S, Chiao YA, Kinter M, Humphries KM. Loss of cardiac PFKFB2 drives Metabolic, Functional, and Electrophysiological Remodeling in the Heart. bioRxiv 2023:2023.11.22.568379. [PMID: 38045353 PMCID: PMC10690253 DOI: 10.1101/2023.11.22.568379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
Background Phosphofructo-2-kinase/fructose-2,6-bisphosphatase (PFK-2) is a critical glycolytic regulator responsible for upregulation of glycolysis in response to insulin and adrenergic signaling. PFKFB2, the cardiac isoform of PFK-2, is degraded in the heart in the absence of insulin signaling, contributing to diabetes-induced cardiac metabolic inflexibility. However, previous studies have not examined how the loss of PFKFB2 affects global cardiac metabolism and function. Methods To address this, we have generated a mouse model with a cardiomyocyte-specific knockout of PFKFB2 (cKO). Using 9-month-old cKO and control (CON) mice, we characterized impacts of PFKFB2 on cardiac metabolism, function, and electrophysiology. Results cKO mice have a shortened lifespan of 9 months. Metabolically, cKO mice are characterized by increased glycolytic enzyme abundance and pyruvate dehydrogenase (PDH) activity, as well as decreased mitochondrial abundance and beta oxidation, suggesting a shift toward glucose metabolism. This was supported by a decrease in the ratio of palmitoyl carnitine to pyruvate-dependent mitochondrial respiration in cKO relative to CON animals. Metabolomic, proteomic, and western blot data support the activation of ancillary glucose metabolism, including pentose phosphate and hexosamine biosynthesis pathways. Physiologically, cKO animals exhibited impaired systolic function and left ventricular (LV) dilation, represented by reduced fractional shortening and increased LV internal diameter, respectively. This was accompanied by electrophysiological alterations including increased QT interval and other metrics of delayed ventricular conduction. Conclusions Loss of PFKFB2 results in metabolic remodeling marked by cardiac ancillary pathway activation. This could delineate an underpinning of pathologic changes to mechanical and electrical function in the heart. Clinical Perspective What is New?: We have generated a novel cardiomyocyte-specific knockout model of PFKFB2, the cardiac isoform of the primary glycolytic regulator Phosphofructokinase-2 (cKO).The cKO model demonstrates that loss of cardiac PFKFB2 drives metabolic reprogramming and shunting of glucose metabolites to ancillary metabolic pathways.The loss of cardiac PFKFB2 promotes electrophysiological and functional remodeling in the cKO heart.What are the Clinical Implications?: PFKFB2 is degraded in the absence of insulin signaling, making its loss particularly relevant to diabetes and the pathophysiology of diabetic cardiomyopathy.Changes which we observe in the cKO model are consistent with those often observed in diabetes and heart failure of other etiologies.Defining PFKFB2 loss as a driver of cardiac pathogenesis identifies it as a target for future investigation and potential therapeutic intervention.
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Li P, Newhardt MF, Matsuzaki S, Eyster C, Pranay A, Peelor FF, Batushansky A, Kinter C, Subramani K, Subrahmanian S, Ahamed J, Yu P, Kinter M, Miller BF, Humphries KM. The loss of cardiac SIRT3 decreases metabolic flexibility and proteostasis in an age-dependent manner. GeroScience 2023; 45:983-999. [PMID: 36460774 PMCID: PMC9886736 DOI: 10.1007/s11357-022-00695-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 11/17/2022] [Indexed: 12/04/2022] Open
Abstract
SIRT3 is a longevity factor that acts as the primary deacetylase in mitochondria. Although ubiquitously expressed, previous global SIRT3 knockout studies have shown primarily a cardiac-specific phenotype. Here, we sought to determine how specifically knocking out SIRT3 in cardiomyocytes (SIRTcKO mice) temporally affects cardiac function and metabolism. Mice displayed an age-dependent increase in cardiac pathology, with 10-month-old mice exhibiting significant loss of systolic function, hypertrophy, and fibrosis. While mitochondrial function was maintained at 10 months, proteomics and metabolic phenotyping indicated SIRT3 hearts had increased reliance on glucose as an energy substrate. Additionally, there was a significant increase in branched-chain amino acids in SIRT3cKO hearts without concurrent increases in mTOR activity. Heavy water labeling experiments demonstrated that, by 3 months of age, there was an increase in protein synthesis that promoted hypertrophic growth with a potential loss of proteostasis in SIRT3cKO hearts. Cumulatively, these data show that the cardiomyocyte-specific loss of SIRT3 results in severe pathology with an accelerated aging phenotype.
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Affiliation(s)
- Ping Li
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
- Department of Cardiology, Central South University, The Third Xiangya Hospital, Changsha, Hunan, China
| | - Maria F Newhardt
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA.
| | - Satoshi Matsuzaki
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Craig Eyster
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Atul Pranay
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Frederick F Peelor
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Albert Batushansky
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Caroline Kinter
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Kumar Subramani
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Sandeep Subrahmanian
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Jasimuddin Ahamed
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Pengchun Yu
- Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Michael Kinter
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
| | - Benjamin F Miller
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Kenneth M Humphries
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, 825 NE 13thSt, Oklahoma City, OK, 73104, USA.
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
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Eyster C, Chuong HH, Lee CY, Pezza RJ, Dawson D. The pericentromeric heterochromatin of homologous chromosomes remains associated after centromere pairing dissolves in mouse spermatocyte meiosis. Chromosoma 2019; 128:355-367. [PMID: 31165256 PMCID: PMC6823320 DOI: 10.1007/s00412-019-00708-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 12/17/2018] [Revised: 05/02/2019] [Accepted: 05/09/2019] [Indexed: 01/27/2023]
Abstract
In meiosis, crossovers between homologous chromosomes link them together. This enables them to attach to microtubules of the meiotic spindle as a unit, such that the homologs will be pulled away from one another at anaphase I. Homologous pairs can sometimes fail to become linked by crossovers. In some organisms, these non-exchange partners are still able to segregate properly. In several organisms, associations between the centromeres of non-exchange partners occur in meiotic prophase. These associations have been proposed to promote segregation in meiosis I. But it is unclear how centromere pairing could promote subsequent proper segregation. Here we report that meiotic centromere pairing of chromosomes in mouse spermatocytes allows the formation of an association between chromosome pairs. We find that heterochromatin regions of homologous centromeres remain associated even after centromere-pairing dissolves. Our results suggest the model that, in mouse spermatocytes, heterochromatin maintains the association of homologous centromeres in the absence crossing-over.
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Affiliation(s)
- Craig Eyster
- Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Hoa H Chuong
- Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Chih-Ying Lee
- Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Roberto J Pezza
- Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.
- Department of Cell Biology, University of Oklahoma Health Science Center, Oklahoma City, OK, USA.
| | - Dean Dawson
- Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.
- Department of Cell Biology, University of Oklahoma Health Science Center, Oklahoma City, OK, USA.
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Jordan PW, Eyster C, Chen J, Pezza RJ, Rankin S. Sororin is enriched at the central region of synapsed meiotic chromosomes. Chromosome Res 2017; 25:115-128. [PMID: 28050734 PMCID: PMC5441961 DOI: 10.1007/s10577-016-9542-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 12/13/2016] [Indexed: 01/09/2023]
Abstract
During meiotic prophase, cohesin complexes mediate cohesion between sister chromatids and promote pairing and synapsis of homologous chromosomes. Precisely how the activity of cohesin is controlled to promote these events is not fully understood. In metazoans, cohesion establishment between sister chromatids during mitotic divisions is accompanied by recruitment of the cohesion-stabilizing protein Sororin. During somatic cell division cycles, Sororin is recruited in response to DNA replication-dependent modification of the cohesin complex by ESCO acetyltransferases. How Sororin is recruited and acts in meiosis is less clear. Here, we have surveyed the chromosomal localization of Sororin and its relationship to the meiotic cohesins and other chromatin modifiers with the objective of determining how Sororin contributes to meiotic chromosome dynamics. We show that Sororin localizes to the cores of meiotic chromosomes in a manner that is dependent on synapsis and the synaptonemal complex protein SYCP1. In contrast, cohesin, with which Sororin interacts in mitotic cells, shows axial enrichment on meiotic chromosomes even in the absence of synapsis between homologs. Using high-resolution microscopy, we show that Sororin is localized to the central region of the synaptonemal complex. These results indicate that Sororin regulation during meiosis is distinct from its regulation in mitotic cells and may suggest that it interacts with a distinctly different partner to ensure proper chromosome dynamics in meiosis.
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Affiliation(s)
- Philip W Jordan
- Biochemistry and Molecular Biology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, 21205, USA
| | - Craig Eyster
- Cell Cycle and Cancer Biology Program, Oklahoma Medical Research Foundation, 825 NE 13th St., Oklahoma City, OK, 73104, USA
| | - Jingrong Chen
- Cell Cycle and Cancer Biology Program, Oklahoma Medical Research Foundation, 825 NE 13th St., Oklahoma City, OK, 73104, USA
| | - Roberto J Pezza
- Cell Cycle and Cancer Biology Program, Oklahoma Medical Research Foundation, 825 NE 13th St., Oklahoma City, OK, 73104, USA.
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA.
| | - Susannah Rankin
- Cell Cycle and Cancer Biology Program, Oklahoma Medical Research Foundation, 825 NE 13th St., Oklahoma City, OK, 73104, USA.
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA.
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Guiraldelli MF, Eyster C, Pezza RJ. Genome instability and embryonic developmental defects in RMI1 deficient mice. DNA Repair (Amst) 2013; 12:835-43. [PMID: 23900276 DOI: 10.1016/j.dnarep.2013.07.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Revised: 06/04/2013] [Accepted: 07/08/2013] [Indexed: 12/19/2022]
Abstract
RMI1 forms an evolutionarily conserved complex with BLM/TOP3α/RMI2 (BTR complex) to prevent and resolve aberrant recombination products, thereby promoting genome stability. Most of our knowledge about RMI1 function has been obtained from biochemical studies in vitro. In contrast, the role of RMI1 in vivo remains unclear. Previous attempts to generate an Rmi1 knockout mouse line resulted in pre-implantation embryonic lethality, precluding the use of mouse embryonic fibroblasts (MEFs) and embryonic morphology to assess the role of RMI1 in vivo. Here, we report the generation of an Rmi1 deficient mouse line (hy/hy) that develops until 9.5 days post coitum (dpc) with marked defects in development. MEFs derived from Rmi1(hy/hy) are characterized by severely impaired cell proliferation, frequently having elevated DNA content, high numbers of micronuclei and an elevated percentage of partial condensed chromosomes. Our results demonstrate the importance of RMI1 in maintaining genome integrity and normal embryonic development.
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Affiliation(s)
- Michel F Guiraldelli
- Cell Cycle and Cancer Biology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
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Guiraldelli MF, Eyster C, Wilkerson JL, Dresser ME, Pezza RJ. Mouse HFM1/Mer3 is required for crossover formation and complete synapsis of homologous chromosomes during meiosis. PLoS Genet 2013; 9:e1003383. [PMID: 23555294 PMCID: PMC3605105 DOI: 10.1371/journal.pgen.1003383] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Accepted: 01/30/2013] [Indexed: 12/31/2022] Open
Abstract
Faithful chromosome segregation during meiosis requires that homologous chromosomes associate and recombine. Chiasmata, the cytological manifestation of recombination, provide the physical link that holds the homologs together as a pair, facilitating their orientation on the spindle at meiosis I. Formation of most crossover (CO) events requires the assistance of a group of proteins collectively known as ZMM. HFM1/Mer3 is in this group of proteins and is required for normal progression of homologous recombination and proper synapsis between homologous chromosomes in a number of model organisms. Our work is the first study in mammals showing the in vivo function of mouse HFM1. Cytological observations suggest that initial steps of recombination are largely normal in a majority of Hfm1(-/-) spermatocytes. Intermediate and late stages of recombination appear aberrant, as chromosomal localization of MSH4 is altered and formation of MLH1foci is drastically reduced. In agreement, chiasma formation is reduced, and cells arrest with subsequent apoptosis at diakinesis. Our results indicate that deletion of Hfm1 leads to the elimination of a major fraction but not all COs. Formation of chromosome axial elements and homologous pairing is apparently normal, and Hfm1(-/-) spermatocytes progress to the end of prophase I without apparent developmental delay or apoptosis. However, synapsis is altered with components of the central region of the synaptonemal complex frequently failing to extend the full length of the chromosome axes. We propose that initial steps of recombination are sufficient to support homology recognition, pairing, and initial chromosome synapsis and that HFM1 is required to form normal numbers of COs and to complete synapsis.
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Affiliation(s)
- Michel F. Guiraldelli
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Craig Eyster
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
| | - Joseph L. Wilkerson
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
- Department of Cell Biology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma, United States of America
| | - Michael E. Dresser
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
- Department of Cell Biology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma, United States of America
| | - Roberto J. Pezza
- Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, United States of America
- Department of Cell Biology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma, United States of America
- * E-mail:
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Heyborne K, Fu YX, Kalataradi H, Reardon C, Roark C, Eyster C, Vollmer M, Born W, O'Brien R. Evidence that murine V gamma 5 and V gamma 6 gamma delta-TCR+ lymphocytes are derived from a common distinct lineage. The Journal of Immunology 1993. [DOI: 10.4049/jimmunol.151.9.4523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Murine V gamma 5 and V gamma 6+ T lymphocytes develop sequentially in the thymus during fetal and newborn life, giving rise to intraepithelial lymphocytes of the epidermis and female reproductive tract. In analyzing a panel of gamma delta T cell hybridomas derived from various tissues, we found that all V gamma 6+ cells tested (n = 25) expressed V gamma 5-C gamma 1 mRNA, whereas none of a panel of V gamma 6- cells analyzed (n = 33) expressed this mRNA. V gamma 6 mRNA was rare in V gamma 5+ cells (1 of 9), and absent in all other gamma delta T cells (n = 10). These findings suggest that most, if not all, V gamma 6-TCR+ lymphocytes arise from precursor cells that have previously rearranged the V gamma 5 gene, and indicate that V gamma 5 and V gamma 6+ lymphocytes belong to a common, distinct lineage that does not give rise to other gamma delta T cells.
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Affiliation(s)
- K Heyborne
- Department of Obstetrics and Gynecology, University of Colorado Health Sciences Center, Denver 80262
| | - Y X Fu
- Department of Obstetrics and Gynecology, University of Colorado Health Sciences Center, Denver 80262
| | - H Kalataradi
- Department of Obstetrics and Gynecology, University of Colorado Health Sciences Center, Denver 80262
| | - C Reardon
- Department of Obstetrics and Gynecology, University of Colorado Health Sciences Center, Denver 80262
| | - C Roark
- Department of Obstetrics and Gynecology, University of Colorado Health Sciences Center, Denver 80262
| | - C Eyster
- Department of Obstetrics and Gynecology, University of Colorado Health Sciences Center, Denver 80262
| | - M Vollmer
- Department of Obstetrics and Gynecology, University of Colorado Health Sciences Center, Denver 80262
| | - W Born
- Department of Obstetrics and Gynecology, University of Colorado Health Sciences Center, Denver 80262
| | - R O'Brien
- Department of Obstetrics and Gynecology, University of Colorado Health Sciences Center, Denver 80262
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Heyborne K, Fu YX, Kalataradi H, Reardon C, Roark C, Eyster C, Vollmer M, Born W, O'Brien R. Evidence that murine V gamma 5 and V gamma 6 gamma delta-TCR+ lymphocytes are derived from a common distinct lineage. J Immunol 1993; 151:4523-7. [PMID: 8409415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Murine V gamma 5 and V gamma 6+ T lymphocytes develop sequentially in the thymus during fetal and newborn life, giving rise to intraepithelial lymphocytes of the epidermis and female reproductive tract. In analyzing a panel of gamma delta T cell hybridomas derived from various tissues, we found that all V gamma 6+ cells tested (n = 25) expressed V gamma 5-C gamma 1 mRNA, whereas none of a panel of V gamma 6- cells analyzed (n = 33) expressed this mRNA. V gamma 6 mRNA was rare in V gamma 5+ cells (1 of 9), and absent in all other gamma delta T cells (n = 10). These findings suggest that most, if not all, V gamma 6-TCR+ lymphocytes arise from precursor cells that have previously rearranged the V gamma 5 gene, and indicate that V gamma 5 and V gamma 6+ lymphocytes belong to a common, distinct lineage that does not give rise to other gamma delta T cells.
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MESH Headings
- Animals
- Gene Rearrangement, gamma-Chain T-Cell Antigen Receptor
- Hybridomas
- Mice
- Mice, Inbred C57BL
- RNA, Messenger/analysis
- RNA, Messenger/genetics
- Receptors, Antigen, T-Cell, gamma-delta/analysis
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- T-Lymphocyte Subsets/immunology
- T-Lymphocyte Subsets/physiology
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Affiliation(s)
- K Heyborne
- Department of Obstetrics and Gynecology, University of Colorado Health Sciences Center, Denver 80262
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Leventhal JM, Hamilton J, Rekedal S, Tebano-Micci A, Eyster C. Anatomically correct dolls used in interviews of young children suspected of having been sexually abused. Pediatrics 1989; 84:900-6. [PMID: 2797984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
To determine the value of using anatomically correct dolls in diagnostic interviews of young children suspected of being sexually abused, the records of 83 children who were less than 7 years of age and who were evaluated at Yale-New Haven Hospital because of a suspicion of sexual abuse were reviewed. The dolls were used in 60 cases (72%). When the dolls were used, children provided significantly more information than by interview alone about what had happened and about the identity of the suspected perpetrator. Children less than 3 years of age, however, were unable to provide details about the abuse despite the use of the dolls. The ratings of the likelihood that sexual abuse had occurred were based on all of the information in the case including that obtained through the diagnostic interview with the dolls. When these ratings were compared with the ratings based on evidence obtained solely from noninterview data, the likelihood of abuse was higher in 35% of the cases. It was concluded that substantially more information is provided by young children when anatomically correct dolls are used and that the likelihood of detection of abuse is increased when information from the child is included in the assessment.
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Affiliation(s)
- J M Leventhal
- Department of Pediatrics, Yale University School of Medicine, New Haven, Connecticut 06510
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Eyster C. Answering Governor Lamm: Don't let government allocate private resources. Rev Fed Am Hosp 1985; 18:44. [PMID: 10271377] [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: 02/12/2023]
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Eyster C. The threat behind Medicaid cuts. Rev Fed Am Hosp 1985; 18:49. [PMID: 10300104] [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: 02/12/2023]
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Eyster C. Some states recognize broad role in care of medically indigent. Rev Fed Am Hosp 1985; 18:76. [PMID: 10269665] [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: 02/12/2023]
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Eyster C. State rate setting resoundingly beaten by Arizona voters. Rev Fed Am Hosp 1984; 17:11. [PMID: 10270624] [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: 02/12/2023]
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Eyster C. 1984 activity indicates state lawmakers looking beyond regulation. Rev Fed Am Hosp 1984; 17:16-7. [PMID: 10270110] [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: 02/12/2023]
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Eyster C, Brown TE, Tanner HA, Hood SL. Manganese Requirement with Respect to Growth, Hill Reaction and Photosynthesis. Plant Physiol 1958; 33:235-41. [PMID: 16655121 PMCID: PMC541072 DOI: 10.1104/pp.33.4.235] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Affiliation(s)
- C Eyster
- CHARLES F. KETTERING FOUNDATION, YELLOW SPRINGS, OHIO
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