1
|
Tang VT, Xiang J, Chen Z, McCormick J, Abbineni PS, Chen XW, Hoenerhoff M, Emmer BT, Khoriaty R, Lin JD, Ginsburg D. Functional overlap between the mammalian Sar1a and Sar1b paralogs in vivo. Proc Natl Acad Sci U S A 2024; 121:e2322164121. [PMID: 38687799 DOI: 10.1073/pnas.2322164121] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 03/29/2024] [Indexed: 05/02/2024] Open
Abstract
Proteins carrying a signal peptide and/or a transmembrane domain enter the intracellular secretory pathway at the endoplasmic reticulum (ER) and are transported to the Golgi apparatus via COPII vesicles or tubules. SAR1 initiates COPII coat assembly by recruiting other coat proteins to the ER membrane. Mammalian genomes encode two SAR1 paralogs, SAR1A and SAR1B. While these paralogs exhibit ~90% amino acid sequence identity, it is unknown whether they perform distinct or overlapping functions in vivo. We now report that genetic inactivation of Sar1a in mice results in lethality during midembryogenesis. We also confirm previous reports that complete deficiency of murine Sar1b results in perinatal lethality. In contrast, we demonstrate that deletion of Sar1b restricted to hepatocytes is compatible with survival, though resulting in hypocholesterolemia that can be rescued by adenovirus-mediated overexpression of either SAR1A or SAR1B. To further examine the in vivo function of these two paralogs, we genetically engineered mice with the Sar1a coding sequence replacing that of Sar1b at the endogenous Sar1b locus. Mice homozygous for this allele survive to adulthood and are phenotypically normal, demonstrating complete or near-complete overlap in function between the two SAR1 protein paralogs in mice. These data also suggest upregulation of SAR1A gene expression as a potential approach for the treatment of SAR1B deficiency (chylomicron retention disease) in humans.
Collapse
Grants
- R35HL135793 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- R01HL148333 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- R01HL157062 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- K08HL148552 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- R00GM141268 HHS | NIH | National Institute of General Medical Sciences (NIGMS)
- 20PRE35210706 American Heart Association (AHA)
- R35HL171421 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- R01HL167733 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
Collapse
Affiliation(s)
- Vi T Tang
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Jie Xiang
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Zhimin Chen
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Joseph McCormick
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Prabhodh S Abbineni
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
- Department of Microbiology and Immunology, Loyola University Chicago Stritch School of Medicine, Maywood, IL 60153
| | - Xiao-Wei Chen
- State Key Laboratory of Membrane Biology, Peking University, Beijing 100871, China
| | - Mark Hoenerhoff
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Brian T Emmer
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
| | - Jiandie D Lin
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109
| | - David Ginsburg
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109
- Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI 48109
| |
Collapse
|
2
|
Tang VT, Xiang J, Chen Z, McCormick J, Abbineni PS, Chen XW, Hoenerhoff M, Emmer BT, Khoriaty R, Lin JD, Ginsburg D. Functional overlap between the mammalian Sar1a and Sar1b paralogs in vivo. bioRxiv 2024:2024.02.27.582310. [PMID: 38463989 PMCID: PMC10925261 DOI: 10.1101/2024.02.27.582310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Proteins carrying a signal peptide and/or a transmembrane domain enter the intracellular secretory pathway at the endoplasmic reticulum (ER) and are transported to the Golgi apparatus via COPII vesicles or tubules. SAR1 initiates COPII coat assembly by recruiting other coat proteins to the ER membrane. Mammalian genomes encode two SAR1 paralogs, SAR1A and SAR1B. While these paralogs exhibit ~90% amino acid sequence identity, it is unknown whether they perform distinct or overlapping functions in vivo. We now report that genetic inactivation of Sar1a in mice results in lethality during mid-embryogenesis. We also confirm previous reports that complete deficiency of murine Sar1b results in perinatal lethality. In contrast, we demonstrate that deletion of Sar1b restricted to hepatocytes is compatible with survival, though resulting in hypocholesterolemia that can be rescued by adenovirus-mediated overexpression of either SAR1A or SAR1B. To further examine the in vivo function of these 2 paralogs, we genetically engineered mice with the Sar1a coding sequence replacing that of Sar1b at the endogenous Sar1b locus. Mice homozygous for this allele survive to adulthood and are phenotypically normal, demonstrating complete or near-complete overlap in function between the two SAR1 protein paralogs in mice. These data also suggest upregulation of SAR1A gene expression as a potential approach for the treatment of SAR1B deficiency (chylomicron retention disease) in humans.
Collapse
Affiliation(s)
- Vi T. Tang
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Jie Xiang
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Zhimin Chen
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Joseph McCormick
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Prabhodh S. Abbineni
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
- Department of Microbiology and Immunology, Loyola University Chicago Stritch School of Medicine, Maywood, IL 60153
| | - Xiao-Wei Chen
- State Key Laboratory of Membrane Biology, Peking University, Beijing 100871, China
| | - Mark Hoenerhoff
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Brian T. Emmer
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
| | - Jiandie D. Lin
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109
| | - David Ginsburg
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
- Department of Human Genetics, University of Michigan, Ann Arbor, MI 48109
- Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI 48109
| |
Collapse
|
3
|
Tang VT, Abbineni PS, Veiga Leprevost FD, Basrur V, Khoriaty R, Emmer BT, Nesvizhskii AI, Ginsburg D. Identification of LMAN1- and SURF4-Dependent Secretory Cargoes. J Proteome Res 2023; 22:3439-3446. [PMID: 37844105 PMCID: PMC10629478 DOI: 10.1021/acs.jproteome.3c00259] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Indexed: 10/18/2023]
Abstract
Most proteins secreted into the extracellular space are first recruited from the endoplasmic reticulum into coat protein complex II (COPII)-coated vesicles or tubules that facilitate their transport to the Golgi apparatus. Although several secreted proteins have been shown to be actively recruited into COPII vesicles and tubules by the cargo receptors LMAN1 and SURF4, the full cargo repertoire of these receptors is unknown. We now report mass spectrometry analysis of conditioned media and cell lysates from HuH7 cells CRISPR targeted to inactivate the LMAN1 or SURF4 gene. We found that LMAN1 has limited clients in HuH7 cells, whereas SURF4 traffics a broad range of cargoes. Analysis of putative SURF4 cargoes suggests that cargo recognition is governed by complex mechanisms rather than interaction with a universal binding motif..
Collapse
Affiliation(s)
- Vi T. Tang
- Department
of Molecular and Integrative Physiology and Life Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Prabhodh S. Abbineni
- Life
Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Microbiology and Immunology, Loyola University
Chicago Stritch School of Medicine, Maywood, Illinois 60153, United States
| | | | - Venkatesha Basrur
- Department
of Pathology, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Rami Khoriaty
- Department
of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Cell and Developmental Biology, University
of Michigan, Ann Arbor, Michigan 48109, United States
| | - Brian T. Emmer
- Department
of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Alexey I. Nesvizhskii
- Department
of Pathology, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - David Ginsburg
- Life
Sciences Institute, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Internal Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Human Genetics, University of Michigan, Ann Arbor, Michigan 48109, United States
- Department
of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, Michigan 48109, United States
- Howard
Hughes Medical Institute, University of
Michigan, Ann Arbor, Michigan 48109, United States
| |
Collapse
|
4
|
Myers G, Wang Y, Wang Q, Friedman A, Sanchez-Martinez A, Liu X, Sharon SA, Lim KC, Khoriaty R, Engel JD, Yu L. Murine erythroid differentiation kinetics in vivo under normal and anemic stress conditions. Blood Adv 2023; 7:5727-5732. [PMID: 37552129 PMCID: PMC10539864 DOI: 10.1182/bloodadvances.2023010088] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 07/10/2023] [Accepted: 08/01/2023] [Indexed: 08/09/2023] Open
Abstract
Our current understanding of the kinetics and dynamics of erythroid differentiation is based almost entirely on the ex vivo expansion of cultured hematopoietic progenitor cells. In this study, we used an erythroid-specific, inducible transgenic mouse line to investigate for the first time, the in vivo erythroid differentiation kinetics under steady-state conditions. We demonstrated that bipotent premegakaroycyte/erythroid (PreMegE) progenitor cells differentiate into erythroid-committed proerythroblast/basophilic erythroblasts (ProBasoE) after 6.6 days under steady-state conditions. During this process, each differentiation phase (from PreMegE to precolony forming unit-erythroid [PreCFU-E], PreCFU-E to CFU-E, and CFU-E to ProBasoE) took ∼2 days in vivo. Upon challenge with 5-flurouracil (5-FU), which leads to the induction of stress erythropoiesis, erythroid maturation time was reduced from 6.6 to 4.7 days. Furthermore, anemia induced in 5-FU-treated mice was shown to be due not only to depleted bone marrow erythroid progenitor stores but also to a block in reticulocyte exit from the bone marrow into the circulation, which differed from the mechanism induced by acute blood loss.
Collapse
Affiliation(s)
- Greggory Myers
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI
| | - Yu Wang
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI
| | - Qing Wang
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI
| | - Ann Friedman
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI
| | | | - Xiaofang Liu
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI
| | - Singh A. Sharon
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, MI
| | - Kim-Chew Lim
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI
| | - Rami Khoriaty
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI
- Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI
| | - James Douglas Engel
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI
- Rogel Cancer Center, University of Michigan Medical School, Ann Arbor, MI
| | - Lei Yu
- Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI
- Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI
| |
Collapse
|
5
|
Tang VT, McCormick J, Xu B, Wang Y, Fang H, Wang X, Siemieniak D, Khoriaty R, Emmer BT, Chen XW, Ginsburg D. Hepatic inactivation of murine Surf4 results in marked reduction in plasma cholesterol. eLife 2022; 11:82269. [PMID: 36193893 PMCID: PMC9581532 DOI: 10.7554/elife.82269] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 10/03/2022] [Indexed: 11/13/2022] Open
Abstract
PCSK9 negatively regulates low-density lipoprotein receptor (LDLR) abundance on the cell surface, leading to decreased hepatic clearance of LDL particles and increased levels of plasma cholesterol. We previously identified SURF4 as a cargo receptor that facilitates PCSK9 secretion in HEK293T cells (Emmer et al., 2018). Here, we generated hepatic SURF4-deficient mice (Surf4fl/fl Alb-Cre+) to investigate the physiologic role of SURF4 in vivo. Surf4fl/flAlb-Cre+ mice exhibited normal viability, gross development, and fertility. Plasma PCSK9 levels were reduced by ~60% in Surf4fl/fl Alb-Cre+ mice, with a corresponding ~50% increase in steady state LDLR protein abundance in the liver, consistent with SURF4 functioning as a cargo receptor for PCSK9. Surprisingly, these mice exhibited a marked reduction in plasma cholesterol and triglyceride levels out of proportion to the partial increase in hepatic LDLR abundance. Detailed characterization of lipoprotein metabolism in these mice instead revealed a severe defect in hepatic lipoprotein secretion, consistent with prior reports of SURF4 also promoting the secretion of apolipoprotein B (APOB). Despite a small increase in liver mass and lipid content, histologic evaluation revealed no evidence of steatohepatitis or fibrosis in Surf4fl/fl Alb-Cre+ mice. Acute depletion of hepatic SURF4 by CRISPR/Cas9 or liver-targeted siRNA in adult mice confirms these findings. Together, these data support the physiologic significance of SURF4 in the hepatic secretion of PCSK9 and APOB-containing lipoproteins and its potential as a therapeutic target in atherosclerotic cardiovascular diseases.
Collapse
Affiliation(s)
- Vi T Tang
- Department of Molecular and Integrative Physiology, University of Michigan-Ann Arbor, Ann Arbor, United States
| | - Joseph McCormick
- Life Sciences Institute, University of Michigan-Ann Arbor, Ann Arbor, United States
| | - Bolin Xu
- College of Future Technology, Peking University, Beijing, China
| | - Yawei Wang
- Center for Life Sciences, Peking University, Beijing, China
| | - Huan Fang
- College of Future Technology, Peking University, Beijing, China
| | - Xiao Wang
- College of Future Technology, Peking University, Beijing, China
| | - David Siemieniak
- Life Sciences Institute, University of Michigan-Ann Arbor, Ann Arbor, United States
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan-Ann Arbor, Ann Arbor, United States
| | - Brian T Emmer
- Department of Internal Medicine, University of Michigan-Ann Arbor, Ann Arbor, United States
| | - Xiao-Wei Chen
- State Key Laboratory of Membrane Biology, Peking University, Beijing, China
| | - David Ginsburg
- Life Sciences Institute, University of Michigan-Ann Arbor, Ann Arbor, United States
| |
Collapse
|
6
|
Abstract
PURPOSE OF REVIEW The congenital dyserythropoietic anemias (CDA) are hereditary disorders characterized by ineffective erythropoiesis. This review evaluates newly developed CDA disease models, the latest advances in understanding the pathogenesis of the CDAs, and recently identified CDA genes. RECENT FINDINGS Mice exhibiting features of CDAI were recently generated, demonstrating that Codanin-1 (encoded by Cdan1) is essential for primitive erythropoiesis. Additionally, Codanin-1 was found to physically interact with CDIN1, suggesting that mutations in CDAN1 and CDIN1 result in CDAI via a common mechanism. Recent advances in CDAII (which results from SEC23B mutations) have also been made. SEC23B was found to functionally overlap with its paralogous protein, SEC23A, likely explaining the absence of CDAII in SEC23B-deficient mice. In contrast, mice with erythroid-specific deletion of 3 or 4 of the Sec23 alleles exhibited features of CDAII. Increased SEC23A expression rescued the CDAII erythroid defect, suggesting a novel therapeutic strategy for the disease. Additional recent advances included the identification of new CDA genes, RACGAP1 and VPS4A, in CDAIII and a syndromic CDA type, respectively. SUMMARY Establishing cellular and animal models of CDA is expected to result in improved understanding of the pathogenesis of these disorders, which may ultimately lead to the development of new therapies.
Collapse
Affiliation(s)
- Richard King
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
| | - Patrick J. Gallagher
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, Michigan, USA
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan, USA
| |
Collapse
|
7
|
Wei W, Liu Z, Zhang C, Khoriaty R, Zhu M, Zhang B. A common human missense mutation of vesicle coat protein SEC23B leads to growth restriction and chronic pancreatitis in mice. J Biol Chem 2021; 298:101536. [PMID: 34954140 PMCID: PMC8760524 DOI: 10.1016/j.jbc.2021.101536] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/17/2021] [Accepted: 12/18/2021] [Indexed: 11/16/2022] Open
Affiliation(s)
- Wei Wei
- Genomic Medicine Institute, Lerner Research Institute of Cleveland Clinic, Cleveland, Ohio, USA
| | - Zhigang Liu
- Genomic Medicine Institute, Lerner Research Institute of Cleveland Clinic, Cleveland, Ohio, USA
| | - Chao Zhang
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Rami Khoriaty
- Departments of Internal Medicine, Cell and Developmental Biology and Rogel Cancer Center, University of Michigan, Ann Arbor, Michigan, USA
| | - Min Zhu
- Department of Pathology, Xinjiang Key Laboratory of Clinical Genetic Testing and Biomedical Information, Karamay Central Hospital, Karamay, China.
| | - Bin Zhang
- Genomic Medicine Institute, Lerner Research Institute of Cleveland Clinic, Cleveland, Ohio, USA.
| |
Collapse
|
8
|
King R, Lin Z, Balbin-Cuesta G, Myers G, Friedman A, Zhu G, McGee B, Saunders TL, Kurita R, Nakamura Y, Engel JD, Reddy P, Khoriaty R. SEC23A rescues SEC23B-deficient congenital dyserythropoietic anemia type II. Sci Adv 2021; 7:eabj5293. [PMID: 34818036 PMCID: PMC8612686 DOI: 10.1126/sciadv.abj5293] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 10/04/2021] [Indexed: 05/12/2023]
Abstract
Congenital dyserythropoietic anemia type II (CDAII) results from loss-of-function mutations in SEC23B. In contrast to humans, SEC23B-deficient mice deletion do not exhibit CDAII but die perinatally with pancreatic degeneration. Here, we demonstrate that expression of the full SEC23A protein (the SEC23B paralog) from the endogenous regulatory elements of Sec23b completely rescues the SEC23B-deficient mouse phenotype. Consistent with these data, while mice with erythroid-specific deletion of either Sec23a or Sec23b do not exhibit CDAII, we now show that mice with erythroid-specific deletion of all four Sec23 alleles die in mid-embryogenesis with features of CDAII and that mice with deletion of three Sec23 alleles exhibit a milder erythroid defect. To test whether the functional overlap between the SEC23 paralogs is conserved in human erythroid cells, we generated SEC23B-deficient HUDEP-2 cells. Upon differentiation, these cells exhibited features of CDAII, which were rescued by increased expression of SEC23A, suggesting a novel therapeutic strategy for CDAII.
Collapse
Affiliation(s)
- Richard King
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
- University of Michigan Rogel Cancer Center, Ann Arbor, MI, USA
| | - Zesen Lin
- Department of Pharmacology, University of Michigan, Ann Arbor, MI, USA
| | - Ginette Balbin-Cuesta
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, MI, USA
- Medical Scientist Training Program, University of Michigan, Ann Arbor, MI, USA
| | - Gregg Myers
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Ann Friedman
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Guojing Zhu
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Beth McGee
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Thomas L. Saunders
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
- Transgenic Animal Model Core, University of Michigan, Ann Arbor, MI, USA
| | - Ryo Kurita
- Department of Research and Development, Central Blood Institute, Blood Service Headquarters, Japanese Red Cross Society, Tokyo, Japan
| | - Yukio Nakamura
- Cell Engineering Division, RIKEN BioResource Research Center, Ibaraki, Japan
| | - James Douglas Engel
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Pavan Reddy
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
- University of Michigan Rogel Cancer Center, Ann Arbor, MI, USA
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, MI, USA
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
- University of Michigan Rogel Cancer Center, Ann Arbor, MI, USA
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, MI, USA
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| |
Collapse
|
9
|
Yu L, Myers G, Ku CJ, Schneider E, Wang Y, Singh SA, Jearawiriyapaisarn N, White A, Moriguchi T, Khoriaty R, Yamamoto M, Rosenfeld MG, Pedron J, Bushweller JH, Lim KC, Engel JD. An erythroid-to-myeloid cell fate conversion is elicited by LSD1 inactivation. Blood 2021; 138:1691-1704. [PMID: 34324630 PMCID: PMC8569417 DOI: 10.1182/blood.2021011682] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 06/18/2021] [Indexed: 01/28/2023] Open
Abstract
Histone H3 lysine 4 methylation (H3K4Me) is most often associated with chromatin activation, and removing H3K4 methyl groups has been shown to be coincident with gene repression. H3K4Me demethylase KDM1a/LSD1 is a therapeutic target for multiple diseases, including for the potential treatment of β-globinopathies (sickle cell disease and β-thalassemia), because it is a component of γ-globin repressor complexes, and LSD1 inactivation leads to robust induction of the fetal globin genes. The effects of LSD1 inhibition in definitive erythropoiesis are not well characterized, so we examined the consequences of conditional inactivation of Lsd1 in adult red blood cells using a new Gata1creERT2 bacterial artificial chromosome transgene. Erythroid-specific loss of Lsd1 activity in mice led to a block in erythroid progenitor differentiation and to the expansion of granulocyte-monocyte progenitor-like cells, converting hematopoietic differentiation potential from an erythroid fate to a myeloid fate. The analogous phenotype was also observed in human hematopoietic stem and progenitor cells, coincident with the induction of myeloid transcription factors (eg, PU.1 and CEBPα). Finally, blocking the activity of the transcription factor PU.1 or RUNX1 at the same time as LSD1 inhibition rescued myeloid lineage conversion to an erythroid phenotype. These data show that LSD1 promotes erythropoiesis by repressing myeloid cell fate in adult erythroid progenitors and that inhibition of the myeloid-differentiation pathway reverses the lineage switch induced by LSD1 inactivation.
Collapse
Affiliation(s)
- Lei Yu
- Department of Cell and Developmental Biology
| | - Greggory Myers
- Department of Cell and Developmental Biology
- Department of Internal Medicine, and
| | - Chia-Jui Ku
- Department of Cell and Developmental Biology
| | | | - Yu Wang
- Department of Cell and Developmental Biology
| | - Sharon A Singh
- Department of Pediatrics, University of Michigan Medical School, Ann Arbor, MI
| | - Natee Jearawiriyapaisarn
- Thalassemia Research Center, Institute of Molecular Biosciences, Mahidol University, Nakhon Pathom, Thailand
| | - Andrew White
- Vahlteich Medicinal Chemistry Core, College of Pharmacy, University of Michigan, Ann Arbor, MI
| | - Takashi Moriguchi
- Division of Medical Chemistry, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Rami Khoriaty
- Department of Cell and Developmental Biology
- Department of Internal Medicine, and
| | - Masayuki Yamamoto
- Department of Cell and Developmental Biology
- Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Michael G Rosenfeld
- Department of Medicine, University of California San Diego School of Medicine, La Jolla, CA; and
| | - Julien Pedron
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville , VA
| | - John H Bushweller
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville , VA
| | | | | |
Collapse
|
10
|
Sun P, Kumar N, Tin A, Zhao J, Brown MR, Lin Z, Yang ML, Zheng Q, Jia J, Bielak LF, Yu B, Boerwinkle E, Hunker KL, Coresh J, Chen YE, Huo Y, Kardia SL, Khoriaty R, Zhou X, Morrison AC, Zhang Y, Ganesh SK. Epidemiologic and Genetic Associations of Erythropoietin With Blood Pressure, Hypertension, and Coronary Artery Disease. Hypertension 2021; 78:1555-1566. [PMID: 34488438 PMCID: PMC8516734 DOI: 10.1161/hypertensionaha.121.17597] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
[Figure: see text].
Collapse
Affiliation(s)
- Pengfei Sun
- Department of cardiology, Peking University First hospital, Beijing, 100034, China
| | - Nitin Kumar
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Adrienne Tin
- Johns Hopkins Bloomberg School of Public Health, MD, 21205, USA
- University of Mississippi Medical Center, MS, 38677, USA
| | - Jing Zhao
- Department of cardiology, Peking University First hospital, Beijing, 100034, China
| | - Michael R Brown
- Human Genetics Center, Department of Epidemiology, Human Genetics & Environmental Sciences, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Zesen Lin
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Min-Lee Yang
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Qiwen Zheng
- Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jia Jia
- Department of cardiology, Peking University First hospital, Beijing, 100034, China
| | - Lawrence F Bielak
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Bing Yu
- Human Genetics Center, Department of Epidemiology, Human Genetics & Environmental Sciences, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Eric Boerwinkle
- Human Genetics Center, Department of Epidemiology, Human Genetics & Environmental Sciences, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Kristina L. Hunker
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Josef Coresh
- Johns Hopkins Bloomberg School of Public Health, MD, 21205, USA
| | - Y. Eugene Chen
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Yong Huo
- Department of cardiology, Peking University First hospital, Beijing, 100034, China
| | - Sharon L.R. Kardia
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Rami Khoriaty
- Division of Hematology, Department of Internal Medicine and Department of Cell and Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Xiang Zhou
- Department of Biostatistics and Center for Statistical Genetics, University of Michigan School of Public Health, Ann Arbor, MI, 48109, USA
| | - Alanna C. Morrison
- Human Genetics Center, Department of Epidemiology, Human Genetics & Environmental Sciences, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Yan Zhang
- Department of cardiology, Peking University First hospital, Beijing, 100034, China
- Institute of Cardiovascular Disease, Peking University First Hospital, Beijing, 100034, China
| | - Santhi K. Ganesh
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| |
Collapse
|
11
|
Adams EJ, Khoriaty R, Kiseleva A, Cleuren ACA, Tomberg K, van der Ent MA, Gergics P, Tang VT, Zhu G, Hoenerhoff MJ, O'Shea KS, Saunders TL, Ginsburg D. Murine SEC24D can substitute functionally for SEC24C during embryonic development. Sci Rep 2021; 11:21100. [PMID: 34702932 PMCID: PMC8548507 DOI: 10.1038/s41598-021-00579-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 10/07/2021] [Indexed: 11/30/2022] Open
Abstract
The COPII component SEC24 mediates the recruitment of transmembrane cargos or cargo adaptors into newly forming COPII vesicles on the ER membrane. Mammalian genomes encode four Sec24 paralogs (Sec24a-d), with two subfamilies based on sequence homology (SEC24A/B and C/D), though little is known about their comparative functions and cargo-specificities. Complete deficiency for Sec24d results in very early embryonic lethality in mice (before the 8 cell stage), with later embryonic lethality (E7.5) observed in Sec24c null mice. To test the potential overlap in function between SEC24C/D, we employed dual recombinase mediated cassette exchange to generate a Sec24cc-d allele, in which the C-terminal 90% of SEC24C has been replaced by SEC24D coding sequence. In contrast to the embryonic lethality at E7.5 of SEC24C-deficiency, Sec24cc-d/c-d pups survive to term, though dying shortly after birth. Sec24cc-d/c-d pups are smaller in size, but exhibit no other obvious developmental abnormality by pathologic evaluation. These results suggest that tissue-specific and/or stage-specific expression of the Sec24c/d genes rather than differences in cargo export function explain the early embryonic requirements for SEC24C and SEC24D.
Collapse
Affiliation(s)
- Elizabeth J Adams
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA.,Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, 48109, USA.,Constellation Pharmaceuticals, Cambridge, MA, 02142, USA
| | - Rami Khoriaty
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, 48109, USA. .,Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA. .,Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI, 48109, USA. .,Univeristy of Michigan Rogel Cancer Center, Ann Arbor, MI, 48109, USA.
| | - Anna Kiseleva
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Audrey C A Cleuren
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Kärt Tomberg
- Departement of Human Genetics, University of Michigan, Ann Arbor, MI, 48109, USA
| | | | - Peter Gergics
- Departement of Human Genetics, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Vi T Tang
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Guojing Zhu
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Mark J Hoenerhoff
- In Vivo Animal Core, Unit of Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - K Sue O'Shea
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Thomas L Saunders
- Transgenic Animal Model Core, University of Michigan, Ann Arbor, MI, 48109, USA
| | - David Ginsburg
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, 48109, USA. .,Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, 48109, USA. .,Department of Internal Medicine, University of Michigan, Ann Arbor, MI, 48109, USA. .,Department of Pediatrics, University of Michigan, Ann Arbor, MI, 48109, USA. .,Howard Hughes Medical Institute, University of Michigan, Ann Arbor, MI, 48109, USA.
| |
Collapse
|
12
|
Grill S, Padmanaban S, Friedman A, Perkey E, Allen F, Tesmer VM, Chase J, Khoriaty R, Keegan CE, Maillard I, Nandakumar J. TPP1 mutagenesis screens unravel shelterin interfaces and functions in hematopoiesis. JCI Insight 2021; 6:138059. [PMID: 33822766 PMCID: PMC8262337 DOI: 10.1172/jci.insight.138059] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 03/31/2021] [Indexed: 02/06/2023] Open
Abstract
Telomerase catalyzes chromosome end replication in stem cells and other long-lived cells. Mutations in telomerase or telomere-related genes result in diseases known as telomeropathies. Telomerase is recruited to chromosome ends by the ACD/TPP1 protein (TPP1 hereafter), a component of the shelterin complex that protects chromosome ends from unwanted end joining. TPP1 facilitates end protection by binding shelterin proteins POT1 and TIN2. TPP1 variants have been associated with telomeropathies but remain poorly characterized in vivo. Disease variants and mutagenesis scans provide efficient avenues to interrogate the distinct physiological roles of TPP1. Here, we conduct mutagenesis in the TIN2- and POT1-binding domains of TPP1 to discover mutations that dissect TPP1's functions. Our results extend current structural data to reveal that the TPP1-TIN2 interface is more extensive than previously thought and highlight the robustness of the POT1-TPP1 interface. Introduction of separation-of-function mutants alongside known TPP1 telomeropathy mutations in mouse hematopoietic stem cells (mHSCs) lacking endogenous TPP1 demonstrated a clear phenotypic demarcation. TIN2- and POT1-binding mutants were unable to rescue mHSC failure resulting from end deprotection. In contrast, TPP1 telomeropathy mutations sustained mHSC viability, consistent with their selectively impacting end replication. These results highlight the power of scanning mutagenesis in revealing structural interfaces and dissecting multifunctional genes.
Collapse
Affiliation(s)
- Sherilyn Grill
- Department of Molecular, Cellular, and Developmental Biology
| | | | - Ann Friedman
- Life Sciences Institute,,Department of Internal Medicine
| | - Eric Perkey
- Life Sciences Institute,,Graduate Program in Cellular and Molecular Biology, and,Medical Scientist Training Program, University of Michigan, Ann Arbor, Michigan, USA
| | - Frederick Allen
- Division of Hematology/Oncology, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | | | - Jennifer Chase
- Life Sciences Institute,,Graduate Program in Cellular and Molecular Biology, and
| | - Rami Khoriaty
- Department of Internal Medicine,,Department of Cell and Developmental Biology
| | - Catherine E. Keegan
- Department of Pediatrics, and,Department of Human Genetics, University of Michigan, Ann Arbor, Michigan, USA
| | - Ivan Maillard
- Life Sciences Institute,,Department of Internal Medicine,,Division of Hematology/Oncology, Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA.,Department of Cell and Developmental Biology,,Abramson Family Cancer Research Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | | |
Collapse
|
13
|
Kim S, Khoriaty R, Li L, McClune M, Kalfa TA, Wu J, Peltier D, Fujiwara H, Sun Y, Oravecz-Wilson K, King RA, Ginsburg D, Reddy P. ER-to-Golgi transport and SEC23-dependent COPII vesicles regulate T cell alloimmunity. J Clin Invest 2021; 131:136574. [PMID: 33463537 DOI: 10.1172/jci136574] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 01/21/2020] [Accepted: 11/12/2020] [Indexed: 01/24/2023] Open
Abstract
T cell-mediated responses are dependent on their secretion of key effector molecules. However, the critical molecular determinants of the secretion of these proteins are largely undefined. Here, we demonstrate that T cell activation increases trafficking via the ER-to-Golgi pathway. To study the functional role of this pathway, we generated mice with a T cell-specific deletion in SEC23B, a core subunit of coat protein complex II (COPII). We found that SEC23B critically regulated the T cell secretome following activation. SEC23B-deficient T cells exhibited a proliferative defect and reduced effector functions in vitro, as well as in experimental models of allogeneic and xenogeneic hematopoietic cell transplantation in vivo. However, T cells derived from 3 patients with congenital dyserythropoietic anemia II (CDAII), which results from Sec23b mutation, did not exhibit a similar phenotype. Mechanistic studies demonstrated that unlike murine KO T cells, T cells from patients with CDAII harbor increased levels of the closely related paralog, SEC23A. In vivo rescue of murine KO by expression of Sec23a from the Sec23b genomic locus restored T cell functions. Together, our data demonstrate a critical role for the COPII pathway, with evidence for functional overlap in vivo between SEC23 paralogs in the regulation of T cell immunity in both mice and humans.
Collapse
Affiliation(s)
- Stephanie Kim
- Department of Internal Medicine, Division of Hematology and Oncology.,Medical Scientist Training Program, and
| | - Rami Khoriaty
- Department of Internal Medicine, Division of Hematology and Oncology.,Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - Lu Li
- Department of Internal Medicine, Division of Hematology and Oncology
| | - Madison McClune
- Department of Internal Medicine, Division of Hematology and Oncology
| | - Theodosia A Kalfa
- Cancer and Blood Diseases Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Julia Wu
- Department of Internal Medicine, Division of Hematology and Oncology.,Medical Scientist Training Program, and
| | - Daniel Peltier
- Department of Pediatrics, Division of Hematology and Oncology
| | - Hideaki Fujiwara
- Department of Internal Medicine, Division of Hematology and Oncology
| | - Yaping Sun
- Department of Internal Medicine, Division of Hematology and Oncology
| | | | - Richard A King
- Department of Internal Medicine, Division of Hematology and Oncology
| | - David Ginsburg
- Department of Internal Medicine, Division of Hematology and Oncology.,Department of Pediatrics, Division of Hematology and Oncology.,Department of Human Genetics.,Life Sciences Institute.,Howard Hughes Medical Institute, and.,Department of Internal Medicine, Division of Genetic Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Pavan Reddy
- Department of Internal Medicine, Division of Hematology and Oncology
| |
Collapse
|
14
|
Lin Z, King R, Tang V, Myers G, Balbin-Cuesta G, Friedman A, McGee B, Desch K, Ozel AB, Siemieniak D, Reddy P, Emmer B, Khoriaty R. The Endoplasmic Reticulum Cargo Receptor SURF4 Facilitates Efficient Erythropoietin Secretion. Mol Cell Biol 2020; 40:e00180-20. [PMID: 32989016 PMCID: PMC7652404 DOI: 10.1128/mcb.00180-20] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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: 04/27/2020] [Revised: 05/20/2020] [Accepted: 09/24/2020] [Indexed: 12/16/2022] Open
Abstract
Erythropoietin (EPO) stimulates erythroid differentiation and maturation. Though the transcriptional regulation of EPO has been well studied, the molecular determinants of EPO secretion remain unknown. Here, we generated a HEK293T reporter cell line that provides a quantifiable and selectable readout of intracellular EPO levels and performed a genome-scale CRISPR screen that identified SURF4 as an important mediator of EPO secretion. Targeting SURF4 with multiple independent single guide RNAs (sgRNAs) resulted in intracellular accumulation and extracellular depletion of EPO. Both of these phenotypes were rescued by expression of SURF4 cDNA. Additionally, we found that disruption of SURF4 resulted in accumulation of EPO in the endoplasmic reticulum (ER) compartment and that SURF4 and EPO physically interact. Furthermore, SURF4 disruption in Hep3B cells also caused a defect in the secretion of endogenous EPO under conditions mimicking hypoxia, ruling out an artifact of heterologous overexpression. This work demonstrates that SURF4 functions as an ER cargo receptor that mediates the efficient secretion of EPO. Our findings also suggest that modulating SURF4 may be an effective treatment for disorders of erythropoiesis that are driven by aberrant EPO levels. Finally, we show that SURF4 overexpression results in increased secretion of EPO, suggesting a new strategy for more efficient production of recombinant EPO.
Collapse
Affiliation(s)
- Zesen Lin
- Department of Pharmacology, University of Michigan, Ann Arbor, Michigan, USA
| | - Richard King
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Vi Tang
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Greggory Myers
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - Ginette Balbin-Cuesta
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, Michigan, USA
- Medical Scientist Training Program, University of Michigan, Ann Arbor, Michigan, USA
| | - Ann Friedman
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Beth McGee
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Karl Desch
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, Michigan, USA
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan, USA
| | - Ayse Bilge Ozel
- Department of Human Genetics, University of Michigan, Ann Arbor, Michigan, USA
| | - David Siemieniak
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, USA
| | - Pavan Reddy
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, Michigan, USA
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
| | - Brian Emmer
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan, USA
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, Michigan, USA
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan, USA
| |
Collapse
|
15
|
Reid JH, Durant KM, Chen SL, Perissinotti AJ, King R, Khoriaty R, Marini BL. Role of caplacizumab in the treatment of acquired thrombotic thrombocytopenic purpura. J Oncol Pharm Pract 2020; 26:1695-1702. [PMID: 32605495 DOI: 10.1177/1078155220934862] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Acquired thrombotic thrombocytopenic purpura is a rare blood disorder with a high early mortality rate, if untreated. Standard of care plasma exchange and glucocorticoids have dramatically improved survival. However, additional advancements are necessary to further decrease mortality. Caplacizumab-yhdp (Cablivi®) is the first Food and Drug Administration-approved treatment indicated for adult patients with acquired thrombotic thrombocytopenic purpura, in combination with plasma exchange and immunosuppressive therapy. However, there are considerable risks associated with the use of caplacizumab and they must be weighed against the benefits of the medication.
Collapse
Affiliation(s)
- Justin H Reid
- Department of Pharmacy Services and Clinical Pharmacy, Michigan Medicine, Ann Arbor, USA.,University of Michigan College of Pharmacy, Ann Arbor, USA
| | - Karin M Durant
- Department of Pharmacy Services and Clinical Pharmacy, Michigan Medicine, Ann Arbor, USA.,University of Michigan College of Pharmacy, Ann Arbor, USA
| | - Sheh-Li Chen
- Department of Pharmacy, University of North Carolina Medical Center, Chapel Hill, USA.,University of North Carolina Eshelman School of Pharmacy, Chapel Hill, NC
| | - Anthony J Perissinotti
- Department of Pharmacy Services and Clinical Pharmacy, Michigan Medicine, Ann Arbor, USA.,University of Michigan College of Pharmacy, Ann Arbor, USA
| | - Richard King
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, USA.,Rogel Cancer Center, University of Michigan, Ann Arbor, USA
| | - Rami Khoriaty
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, USA.,Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, USA.,Rogel Cancer Center, University of Michigan, Ann Arbor, USA
| | - Bernard L Marini
- Department of Pharmacy Services and Clinical Pharmacy, Michigan Medicine, Ann Arbor, USA.,University of Michigan College of Pharmacy, Ann Arbor, USA
| |
Collapse
|
16
|
Emmer BT, Lascuna PJ, Tang VT, Kotnik EN, Saunders TL, Khoriaty R, Ginsburg D. Murine Surf4 is essential for early embryonic development. PLoS One 2020; 15:e0227450. [PMID: 31978056 PMCID: PMC6980569 DOI: 10.1371/journal.pone.0227450] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 06/19/2019] [Accepted: 12/18/2019] [Indexed: 12/12/2022] Open
Abstract
Newly synthesized proteins co-translationally inserted into the endoplasmic reticulum (ER) lumen may be recruited into anterograde transport vesicles by their association with specific cargo receptors. We recently identified a role for the cargo receptor SURF4 in facilitating the secretion of PCSK9 in cultured cells. To examine the function of SURF4 in vivo, we used CRISPR/Cas9-mediated gene editing to generate mice with germline loss-of-function mutations in Surf4. Heterozygous Surf4+/- mice exhibit grossly normal appearance, behavior, body weight, fecundity, and organ development, with no significant alterations in circulating plasma levels of PCSK9, apolipoprotein B, or total cholesterol, and a detectable accumulation of intrahepatic apoliprotein B. Homozygous Surf4-/- mice exhibit embryonic lethality, with complete loss of all Surf4-/- offspring between embryonic days 3.5 and 9.5. In contrast to the milder murine phenotypes associated with deficiency of known SURF4 cargoes, the embryonic lethality of Surf4-/- mice implies the existence of additional SURF4 cargoes or functions that are essential for murine early embryonic development.
Collapse
Affiliation(s)
- Brian T. Emmer
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan
| | - Paul J. Lascuna
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan
| | - Vi T. Tang
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan
| | - Emilee N. Kotnik
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan
| | - Thomas L. Saunders
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
- Transgenic Animal Model Core Laboratory, University of Michigan, Ann Arbor, Michigan
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, Michigan
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan
| | - David Ginsburg
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan
- University of Michigan Rogel Cancer Center, Ann Arbor, Michigan
- Cellular and Molecular Biology Program, University of Michigan, Ann Arbor, Michigan
- Department of Human Genetics, University of Michigan, Ann Arbor, Michigan
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
- Howard Hughes Medical Institute, University of Michigan, Ann Arbor, Michigan
- * E-mail:
| |
Collapse
|
17
|
Wu SRJ, Khoriaty R, Kim SH, O'Shea KS, Zhu G, Hoenerhoff M, Zajac C, Oravecz-Wilson K, Toubai T, Sun Y, Ginsburg D, Reddy P. SNARE protein SEC22B regulates early embryonic development. Sci Rep 2019; 9:11434. [PMID: 31391476 PMCID: PMC6685974 DOI: 10.1038/s41598-019-46536-7] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 06/27/2019] [Indexed: 11/16/2022] Open
Abstract
The highly conserved SNARE protein SEC22B mediates diverse and critical functions, including phagocytosis, cell growth, autophagy, and protein secretion. However, these characterizations have thus far been limited to in vitro work. Here, we expand our understanding of the role Sec22b plays in vivo. We utilized Cre-Lox mice to delete Sec22b in three tissue compartments. With a germline deletion of Sec22b, we observed embryonic death at E8.5. Hematopoietic/endothelial cell deletion of Sec22b also resulted in in utero death. Notably, mice with Sec22b deletion in CD11c-expressing cells of the hematopoietic system survive to adulthood. These data demonstrate Sec22b contributes to early embryogenesis through activity both in hematopoietic/endothelial tissues as well as in other tissues yet to be defined.
Collapse
Affiliation(s)
- Shin-Rong J Wu
- Program in Immunology, University of Michigan Medical School, Ann Arbor, USA.,Medical Scientist Training Program, University of Michigan Medical School, Ann Arbor, USA
| | - Rami Khoriaty
- Department of Internal Medicine, Michigan Medicine, Ann Arbor, USA
| | - Stephanie H Kim
- Program in Immunology, University of Michigan Medical School, Ann Arbor, USA.,Medical Scientist Training Program, University of Michigan Medical School, Ann Arbor, USA
| | - K Sue O'Shea
- Department of Cellular and Developmental Biology, University of Michigan Medical School, Ann Arbor, USA
| | - Guojing Zhu
- Life Sciences Institute, University of Michigan, Ann Arbor, USA
| | - Mark Hoenerhoff
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, USA
| | - Cynthia Zajac
- Department of Internal Medicine, Michigan Medicine, Ann Arbor, USA
| | | | - Tomomi Toubai
- Department of Internal Medicine, Michigan Medicine, Ann Arbor, USA
| | - Yaping Sun
- Department of Internal Medicine, Michigan Medicine, Ann Arbor, USA
| | - David Ginsburg
- Department of Internal Medicine, Michigan Medicine, Ann Arbor, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, USA.,Department of Human Genetics, University of Michigan Medical School, Ann Arbor, USA.,Howard Hughes Medical Institute, University of Michigan, Ann Arbor, USA
| | - Pavan Reddy
- Program in Immunology, University of Michigan Medical School, Ann Arbor, USA. .,Department of Internal Medicine, Michigan Medicine, Ann Arbor, USA.
| |
Collapse
|
18
|
Khoriaty R, Ozel AB, Ramdas S, Ross C, Desch K, Shavit JA, Everett L, Siemieniak D, Li JZ, Ginsburg D. Genome-wide linkage analysis and whole-exome sequencing identifies an ITGA2B mutation in a family with thrombocytopenia. Br J Haematol 2019; 186:574-579. [PMID: 31119735 DOI: 10.1111/bjh.15961] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 12/15/2018] [Accepted: 03/19/2019] [Indexed: 11/27/2022]
Abstract
Hereditary thrombocytopenias can be subclassified based on mode of inheritance and platelet size. Here we report a family with autosomal dominant (AD) thrombocytopenia with normal platelet size. Linkage analysis and whole exome sequencing identified the R1026W substitution in ITGA2B as the causative defect. The same mutation has been previously reported in 7 Japanese families/patients with AD thrombocytopenia, but all of these patients had macrothrombocytopenia. This is the first report of a family with AD thrombocytopenia with normal platelet size resulting from mutation in ITGA2B. ITGA2B mutations should therefore be included in the differential diagnosis of this latter disorder.
Collapse
Affiliation(s)
- Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, USA.,University of Michigan Rogel Cancer Center, Univeristy of Michigan, Ann Arbor, MI, USA
| | - Ayse B Ozel
- Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA
| | - Shweta Ramdas
- Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI, USA
| | - Charles Ross
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA
| | - Karl Desch
- Department of Pediatrics and Communicable Disease, University of Michigan, Ann Arbor, MI, USA
| | - Jordan A Shavit
- Department of Pediatrics and Communicable Disease, University of Michigan, Ann Arbor, MI, USA
| | - Lesley Everett
- Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA
| | - David Siemieniak
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Jun Z Li
- Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA.,Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI, USA
| | - David Ginsburg
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA.,Department of Pediatrics and Communicable Disease, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.,Howard Hughes Medical Institute, University of Michigan, Ann Arbor, MI, USA
| |
Collapse
|
19
|
Wykretowicz J, Song Y, McKnight B, Choi SW, Magenau J, Takiar R, Tomb PE, Ginsburg D, Bixby D, Khoriaty R. A diagnosis of discernment: Identifying a novel ATRX mutation in myelodysplastic syndrome with acquired α-thalassemia. Cancer Genet 2019; 231-232:36-40. [PMID: 30803555 DOI: 10.1016/j.cancergen.2019.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 10/27/2018] [Revised: 12/15/2018] [Accepted: 01/07/2019] [Indexed: 12/15/2022]
Abstract
Myelodysplastic syndromes (MDS) are a heterogeneous category of myeloid neoplasms that represent the most common class of acquired bone marrow failure syndromes in adults. MDS is typically associated with a hypoproliferative macrocytic anemia, but atypical findings on initial diagnostic evaluations can raise concern for a distinct pathophysiological process and lead to the investigation of alternative etiologies. Here, we report a case of MDS with a concomitant hypoproliferative microcytic and hypochromic anemia that led to the identification of acquired hemoglobin H due to a novel somatic ATRX mutation.
Collapse
Affiliation(s)
- Jedrzej Wykretowicz
- Department of Internal Medicine, University of Michigan, 1524 Basic Science Research Building, Ann Arbor, MI 48109, USA
| | - Yeohan Song
- University of Michigan Medical School, University of Michigan, Ann Arbor, MI, USA
| | - Brooke McKnight
- College of Literature Science and the Arts, University of Michigan, Ann Arbor, MI, USA
| | - Sung Won Choi
- Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI, USA
| | - John Magenau
- Department of Internal Medicine, University of Michigan, 1524 Basic Science Research Building, Ann Arbor, MI 48109, USA
| | - Radhika Takiar
- Department of Internal Medicine, University of Michigan, 1524 Basic Science Research Building, Ann Arbor, MI 48109, USA
| | - Paul El Tomb
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - David Ginsburg
- Department of Internal Medicine, University of Michigan, 1524 Basic Science Research Building, Ann Arbor, MI 48109, USA; Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI, USA; Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA; Howard Hughes Medical Institute, Ann Arbor, MI, USA
| | - Dale Bixby
- Department of Internal Medicine, University of Michigan, 1524 Basic Science Research Building, Ann Arbor, MI 48109, USA
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, 1524 Basic Science Research Building, Ann Arbor, MI 48109, USA; Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, USA.
| |
Collapse
|
20
|
Abdulhay N, Verboon J, Ulirsch J, Zieger B, Mi X, Obeng E, Erlacher M, Gupta N, Gabriel S, Ebert B, Niemeyer C, Khoriaty R, Ancliff P, Gazda H, Wlodarski M, Sankaran V. A Cryptic Intronic GATA1 Splicing Mutation Provides Insights Into Human Hematopoietic Differentiation. Exp Hematol 2018. [DOI: 10.1016/j.exphem.2018.06.185] [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: 11/27/2022]
|
21
|
Wang B, Joo JH, Mount R, Teubner BJW, Krenzer A, Ward AL, Ichhaporia VP, Adams EJ, Khoriaty R, Peters ST, Pruett-Miller SM, Zakharenko SS, Ginsburg D, Kundu M. The COPII cargo adapter SEC24C is essential for neuronal homeostasis. J Clin Invest 2018; 128:3319-3332. [PMID: 29939162 DOI: 10.1172/jci98194] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 10/20/2017] [Accepted: 05/08/2018] [Indexed: 12/17/2022] Open
Abstract
SEC24 family members are components of the coat protein complex II (COPII) machinery that interact directly with cargo or with other adapters to ensure proper sorting of secretory cargo into COPII vesicles. SEC24C is 1 of 4 mammalian SEC24 paralogs (SEC24A-D), which segregate into 2 subfamilies on the basis of sequence homology (SEC24A/SEC24B and SEC24C/SEC24D). Here, we demonstrate that postmitotic neurons, unlike professional secretory cells in other tissues, are exquisitely sensitive to loss of SEC24C. Conditional KO of Sec24c in neural progenitors during embryogenesis caused perinatal mortality and microcephaly, with activation of the unfolded protein response and apoptotic cell death of postmitotic neurons in the murine cerebral cortex. The cell-autonomous function of SEC24C in postmitotic neurons was further highlighted by the loss of cell viability caused by disrupting Sec24c expression in forebrain neurons of mice postnatally and in differentiated neurons derived from human induced pluripotent stem cells. The neuronal cell death associated with Sec24c deficiency was rescued in knockin mice expressing Sec24d in place of Sec24c. These data suggest that SEC24C is a major cargo adapter for COPII-dependent transport in postmitotic neurons in developing and adult brains and that its functions overlap at least partially with those of SEC24D in mammals.
Collapse
Affiliation(s)
- Bo Wang
- Department of Pathology.,Department of Cell and Molecular Biology
| | - Joung Hyuck Joo
- Department of Pathology.,Department of Cell and Molecular Biology
| | - Rebecca Mount
- Department of Pathology.,Department of Cell and Molecular Biology
| | | | - Alison Krenzer
- Department of Pathology.,Department of Cell and Molecular Biology
| | - Amber L Ward
- Department of Pathology.,Department of Cell and Molecular Biology
| | - Viraj P Ichhaporia
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Elizabeth J Adams
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Samuel T Peters
- Department of Cell and Molecular Biology.,Center for Advanced Genome Engineering, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Shondra M Pruett-Miller
- Department of Cell and Molecular Biology.,Center for Advanced Genome Engineering, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | | | - David Ginsburg
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, Michigan, USA.,Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA.,Howard Hughes Medical Institute, Life Sciences Institute, and Departments of Human Genetics and Pediatrics, University of Michigan, Ann Arbor, Michigan, USA
| | - Mondira Kundu
- Department of Pathology.,Department of Cell and Molecular Biology
| |
Collapse
|
22
|
Wu SJ, Niknafs YS, Kim SH, Oravecz-Wilson K, Zajac C, Toubai T, Sun Y, Prasad J, Peltier D, Fujiwara H, Hedig I, Mathewson ND, Khoriaty R, Ginsburg D, Reddy P. A Critical Analysis of the Role of SNARE Protein SEC22B in Antigen Cross-Presentation. Cell Rep 2018; 19:2645-2656. [PMID: 28658614 DOI: 10.1016/j.celrep.2017.06.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 04/05/2017] [Accepted: 05/31/2017] [Indexed: 12/22/2022] Open
Abstract
Cross-presentation initiates immune responses against tumors and viral infections by presenting extracellular antigen on MHC I to activate CD8+ T cell-mediated cytotoxicity. In vitro studies in dendritic cells (DCs) established SNARE protein SEC22B as a specific regulator of cross-presentation. However, the in vivo contribution of SEC22B to cross-presentation has not been tested. To address this, we generated DC-specific Sec22b knockout (CD11c-Cre Sec22bfl/fl) mice. Contrary to the paradigm, SEC22B-deficient DCs efficiently cross-present both in vivo and in vitro. Although in vitro small hairpin RNA (shRNA)-mediated Sec22b silencing in bone-marrow-derived dendritic cells (BMDCs) reduced cross-presentation, treatment of SEC22B-deficient BMDCs with the same shRNA produced a similar defect, suggesting the Sec22b shRNA modulates cross-presentation through off-target effects. RNA sequencing of Sec22b shRNA-treated SEC22B-deficient BMDCs demonstrated several changes in the transcriptome. Our data demonstrate that contrary to the accepted model, SEC22B is not necessary for cross-presentation, cautioning against extrapolating phenotypes from knockdown studies alone.
Collapse
Affiliation(s)
- S Julia Wu
- Program in Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Medical Scientist Training Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Yashar S Niknafs
- Medical Scientist Training Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Cellular and Molecular Biology Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Stephanie H Kim
- Program in Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Medical Scientist Training Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Katherine Oravecz-Wilson
- Division of Hematology/Oncology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI 48109, USA
| | - Cynthia Zajac
- Division of Hematology/Oncology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI 48109, USA
| | - Tomomi Toubai
- Division of Hematology/Oncology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI 48109, USA
| | - Yaping Sun
- Division of Hematology/Oncology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI 48109, USA
| | - Jayendra Prasad
- Division of Hematology/Oncology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI 48109, USA
| | - Daniel Peltier
- Division of Pediatric Hematology/Oncology, Department of Pediatrics and Communicable Diseases, Michigan Medicine, Ann Arbor, MI 48109, USA
| | - Hideaki Fujiwara
- Division of Hematology/Oncology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI 48109, USA
| | - Israel Hedig
- Division of Hematology/Oncology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI 48109, USA
| | - Nathan D Mathewson
- Dana Farber Cancer Institute, Harvard University, Cambridge, MA 02215, USA
| | - Rami Khoriaty
- Division of Hematology/Oncology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI 48109, USA
| | - David Ginsburg
- Division of Hematology/Oncology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI 48109, USA; Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Howard Hughes Medical Institute, University of Michigan, Ann Arbor, MI 48109, USA; Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA
| | - Pavan Reddy
- Program in Immunology, University of Michigan Medical School, Ann Arbor, MI 48109, USA; Division of Hematology/Oncology, Department of Internal Medicine, Michigan Medicine, Ann Arbor, MI 48109, USA.
| |
Collapse
|
23
|
Michniacki TF, Hannibal M, Ross CW, Frame DG, DuVall AS, Khoriaty R, Vander Lugt MT, Walkovich KJ. Hematologic Manifestations of Deficiency of Adenosine Deaminase 2 (DADA2) and Response to Tumor Necrosis Factor Inhibition in DADA2-Associated Bone Marrow Failure. J Clin Immunol 2018; 38:166-173. [PMID: 29411230 DOI: 10.1007/s10875-018-0480-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 01/25/2018] [Indexed: 12/18/2022]
Affiliation(s)
- Thomas F Michniacki
- Pediatrics and Communicable Diseases, Pediatric Hematology/Oncology, University of Michigan, 1500 E. Medical Center Drive, D4202 Medical Professional Building, Ann Arbor, MI, 48109, USA.
| | - Mark Hannibal
- Pediatrics - Genetics, University of Michigan, Ann Arbor, MI, USA
| | - Charles W Ross
- Department of Pathology, University of Michigan, Ann Arbor, MI, USA
| | - David G Frame
- Department of Pharmacy, University of Michigan, Ann Arbor, MI, USA
| | - Adam S DuVall
- Pediatric Hematology/Oncology, Oregon Health Sciences University, Portland, OR, USA
| | - Rami Khoriaty
- Department of Internal Medicine, Hematology/Oncology, University of Michigan, Ann Arbor, MI, USA
| | - Mark T Vander Lugt
- Pediatrics and Communicable Diseases, Pediatric Hematology/Oncology, University of Michigan, 1500 E. Medical Center Drive, D4202 Medical Professional Building, Ann Arbor, MI, 48109, USA
| | - Kelly J Walkovich
- Pediatrics and Communicable Diseases, Pediatric Hematology/Oncology, University of Michigan, 1500 E. Medical Center Drive, D4202 Medical Professional Building, Ann Arbor, MI, 48109, USA
| |
Collapse
|
24
|
Grivas PD, Devata S, Khoriaty R, Boonstra PS, Ruch J, McDonnell K, Hernandez-Aya L, Wilfong J, Smerage J, Ison MG, Eisenberg JNS, Silveira M, Cooney KA, Worden FP. Low-Cost Intervention to Increase Influenza Vaccination Rate at a Comprehensive Cancer Center. J Cancer Educ 2017; 32:871-877. [PMID: 27055536 DOI: 10.1007/s13187-016-1017-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Influenza morbidity and mortality can be severe and costly. Vaccination rates remain suboptimal in cancer patients due to provider- and patient-related factors. The objective of this study was to evaluate whether low-cost provider- and patient-focused interventions would increase influenza vaccination rates at the University of Michigan Comprehensive Cancer Center (UMCCC). This quality improvement project included all patients without documentation of influenza vaccination prior to their first outpatient appointment during the 2011-2012 and 2012-2013 influenza seasons. The multi-stepped intervention included provider and patient reminders. Influenza vaccination rates were compiled using CPT-4 codes. Same-day (with appointment) vaccination rates during the intervention seasons were compared to historical (2005-2011 seasons) controls; vaccination rates were also compared to contemporary control population at the University of Michigan Health System (UMHS). Reasons for non-adherence with vaccination were explored. The cumulative same-day vaccination rate in eligible adults was 10.1 % (2011-2012) and 9.4 % (2012-2013) compared to an average 6.9 % during influenza seasons 2005-2011. Based on logistic regression analysis, there was a 37.6 % (95 % CI 35-40.3 %) and 56.1 % (95 % CI 40.9-73 %) relative increase in the adult vaccination rate associated with the intervention, with 399 and 697 additional vaccinations, respectively, for each season. During the 2012-2013 season, the UMCCC adult vaccination rate was higher compared to the remainder of that of the UMHS. The intervention was well accepted by providers. Reasons for no vaccination were provider- and patient-related. Increasing provider and patient awareness with a simple, inexpensive intervention was associated with higher influenza vaccination rates at a large academic cancer center. The intervention is permanently implemented during influenza seasons.
Collapse
Affiliation(s)
- Petros D Grivas
- Department of Hematology/Oncology, Taussig Cancer Institute, Cleveland Clinic, Desk R35, 9500 Euclid Ave, Cleveland, OH, 44195, USA.
| | - Sumana Devata
- Division of Hematology/Oncology, University of Michigan, Ann Arbor, MI, USA
| | - Rami Khoriaty
- Division of Hematology/Oncology, University of Michigan, Ann Arbor, MI, USA
- University of Michigan Comprehensive Cancer Center, Ann Arbor, MI, USA
| | - Philip S Boonstra
- Department of Biostatistics, University of Michigan, Ann Arbor, MI, USA
| | - Joshua Ruch
- Hematology/Oncology, Munson Medical Center, Traverse City, MI, USA
| | - Kevin McDonnell
- Division of Hematology/Oncology, University of Southern California, Los Angeles, CA, USA
| | - Leonel Hernandez-Aya
- Division of Oncology, Washington University School of Medicine, St. Louis, MO, USA
| | - Joshua Wilfong
- Hospice and Palliative Medicine, Stanford University, Stanford, CA, USA
| | - Jeffrey Smerage
- Division of Hematology/Oncology, University of Michigan, Ann Arbor, MI, USA
- University of Michigan Comprehensive Cancer Center, Ann Arbor, MI, USA
| | - Michael G Ison
- Divisions of Infectious Diseases and Organ Transplantation, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | - Maria Silveira
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Kathleen A Cooney
- Division of Hematology/Oncology, University of Michigan, Ann Arbor, MI, USA
- University of Michigan Comprehensive Cancer Center, Ann Arbor, MI, USA
- Department of Urology, University of Michigan, Ann Arbor, MI, USA
| | - Francis P Worden
- Division of Hematology/Oncology, University of Michigan, Ann Arbor, MI, USA
- University of Michigan Comprehensive Cancer Center, Ann Arbor, MI, USA
| |
Collapse
|
25
|
Khoriaty R, Vogel N, Hoenerhoff MJ, Sans MD, Zhu G, Everett L, Nelson B, Durairaj H, McKnight B, Zhang B, Ernst SA, Ginsburg D, Williams JA. SEC23B is required for pancreatic acinar cell function in adult mice. Mol Biol Cell 2017; 28:2146-2154. [PMID: 28539403 PMCID: PMC5509426 DOI: 10.1091/mbc.e17-01-0001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [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: 01/03/2017] [Revised: 05/08/2017] [Accepted: 05/19/2017] [Indexed: 12/27/2022] Open
Abstract
Inactivation of Sec23b exclusively in the pancreatic acinar cells of adult mice results in loss of pancreatic mass, with evidence of cell loss, degeneration of exocrine cells (with smaller-than-normal zymogen granules and ER dilation), ER stress, and increased pancreatic cell apoptosis. Mice with germline absence of SEC23B die perinatally, exhibiting massive pancreatic degeneration. We generated mice with tamoxifen-inducible, pancreatic acinar cell–specific Sec23b deletion. Inactivation of Sec23b exclusively in the pancreatic acinar cells of adult mice results in decreased overall pancreatic weights from pancreatic cell loss (decreased pancreatic DNA, RNA, and total protein content), as well as degeneration of exocrine cells, decreased zymogen granules, and alterations in the endoplasmic reticulum (ER), ranging from vesicular ER to markedly expanded cisternae with accumulation of moderate-density content or intracisternal granules. Acinar Sec23b deletion results in induction of ER stress and increased apoptosis in the pancreas, potentially explaining the loss of pancreatic cells and decreased pancreatic weight. These findings demonstrate that SEC23B is required for normal function of pancreatic acinar cells in adult mice.
Collapse
Affiliation(s)
- Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - Nancy Vogel
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
| | - Mark J Hoenerhoff
- In Vivo Animal Core, Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI 48109
| | - M Dolors Sans
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
| | - Guojing Zhu
- Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109
| | - Lesley Everett
- University of Michigan Medical School, University of Michigan, Ann Arbor, MI 48109
| | - Bradley Nelson
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
| | - Haritha Durairaj
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
| | - Brooke McKnight
- College of Literature Science and the Arts, University of Michigan, Ann Arbor, MI 48109
| | - Bin Zhang
- Genomic Medicine Institute, Cleveland Clinic Lerner Research Institute, Cleveland, OH 44195
| | - Stephen A Ernst
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, MI 48109
| | - David Ginsburg
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109 .,Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109.,Departments of Human Genetics and Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI 48109.,Howard Hughes Medical Institute, University of Michigan, Ann Arbor, MI 48109
| | - John A Williams
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109 .,Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109
| |
Collapse
|
26
|
Khoriaty R, Everett L, Chase J, Zhu G, Hoenerhoff M, McKnight B, Vasievich MP, Zhang B, Tomberg K, Williams J, Maillard I, Ginsburg D. Pancreatic SEC23B deficiency is sufficient to explain the perinatal lethality of germline SEC23B deficiency in mice. Sci Rep 2016; 6:27802. [PMID: 27297878 PMCID: PMC4906273 DOI: 10.1038/srep27802] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [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: 02/08/2016] [Accepted: 05/25/2016] [Indexed: 01/18/2023] Open
Abstract
In humans, loss of function mutations in SEC23B result in Congenital Dyserythropoietic Anemia type II (CDAII), a disease limited to defective erythroid development. Patients with two nonsense SEC23B mutations have not been reported, suggesting that complete SEC23B deficiency might be lethal. We previously reported that SEC23B-deficient mice die perinatally, exhibiting massive pancreatic degeneration and that mice with hematopoietic SEC23B deficiency do not exhibit CDAII. We now show that SEC23B deficiency restricted to the pancreas is sufficient to explain the lethality observed in mice with global SEC23B-deficiency. Immunohistochemical stains demonstrate an acinar cell defect but normal islet cells. Mammalian genomes contain two Sec23 paralogs, Sec23A and Sec23B. The encoded proteins share ~85% amino acid sequence identity. We generate mice with pancreatic SEC23A deficiency and demonstrate that these mice survive normally, exhibiting normal pancreatic weights and histology. Taken together, these data demonstrate that SEC23B but not SEC23A is essential for murine pancreatic development. We also demonstrate that two BAC transgenes spanning Sec23b rescue the lethality of mice homozygous for a Sec23b gene trap allele, excluding a passenger gene mutation as the cause of the pancreatic lethality, and indicating that the regulatory elements critical for Sec23b pancreatic function reside within the BAC transgenes.
Collapse
Affiliation(s)
- Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Lesley Everett
- University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jennifer Chase
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Guojing Zhu
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - Mark Hoenerhoff
- In Vivo Animal Core, Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Brooke McKnight
- College of Literature Science and the Arts, University of Michigan, Ann Arbor, MI, USA
| | | | - Bin Zhang
- Genomic Medicine Institute, Cleveland Clinic Lerner Research Institute, Cleveland, OH, USA
| | - Kärt Tomberg
- Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA
| | - John Williams
- Department of Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Ivan Maillard
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
| | - David Ginsburg
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA.,Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.,Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA.,Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, MI, USA.,Howard Hughes Medical Institute, University of Michigan, Ann Arbor, MI, USA
| |
Collapse
|
27
|
Wu SRJ, Johnson C, Zajac C, Sun Y, Mathewson N, Toubai T, Oravecz-Wilson K, Khoriaty R, Ginsburg D, Reddy P. A Sec22b knockout mouse offers novel insights into the molecular mechanisms of crosspresentation. The Journal of Immunology 2016. [DOI: 10.4049/jimmunol.196.supp.116.9] [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: 01/05/2023]
Abstract
Abstract
Crosspresentation critically contributes to the adaptive immune response to tumors and viral infection by presenting extracellular antigen on MHC I to activate CD8 T cells. However, its molecular regulation is poorly understood. Using in vitro shRNA-mediated knockdown (KD) methods, another group had shown that Sec22b, an ER-SNARE, specifically regulates crosspresentation. Thus, we tested the hypothesis that Sec22b would mediate crosspresentation in vivo. We generated DC-specific Sec22b knockout (KO) mice, which have an intact, functional immune system. After adoptively transferring OT-I T cells into these mice, then injecting with soluble OVA i.p., we analyzed OT-I T cell proliferation to measure crosspresentation. Surprisingly, we saw no difference in OVA crosspresentation by KO versus FL mice. This observation was verified in vitro using KO DCs from BM and spleen crosspresenting soluble and insoluble OVA. We concluded Sec22b is not necessary for crosspresentation, invalidating our hypothesis. However, we were able to reproduce the reduced crosspresentation by shRNA-mediated KD of Sec22b. Intriguingly, when we treated KO BMDCs with the same Sec22b-targeting shRNA, we again observed reduced crosspresentation comparable to that seen in shRNA-treated WT BMDCs. This suggested the shRNA mediates crosspresentation through its effects on an off-target gene. RNAseq data on shRNA-treated BMDCs provided a candidate list of potential crosspresentation mediators. Our data demonstrates that (a) Sec22b is not necessary for crosspresentation, (b) there may be a novel critical mediator of crosspresentation targeted by the shRNA, and (c) extrapolating mechanisms or phenotypes based on KD studies alone must be done with caution.
Collapse
|
28
|
Tomberg K, Khoriaty R, Westrick RJ, Fairfield HE, Reinholdt LG, Brodsky GL, Davizon-Castillo P, Ginsburg D, Di Paola J. Spontaneous 8bp Deletion in Nbeal2 Recapitulates the Gray Platelet Syndrome in Mice. PLoS One 2016; 11:e0150852. [PMID: 26950939 PMCID: PMC4780761 DOI: 10.1371/journal.pone.0150852] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 02/19/2016] [Indexed: 01/06/2023] Open
Abstract
During the analysis of a whole genome ENU mutagenesis screen for thrombosis modifiers, a spontaneous 8 base pair (bp) deletion causing a frameshift in exon 27 of the Nbeal2 gene was identified. Though initially considered as a plausible thrombosis modifier, this Nbeal2 mutation failed to suppress the synthetic lethal thrombosis on which the original ENU screen was based. Mutations in NBEAL2 cause Gray Platelet Syndrome (GPS), an autosomal recessive bleeding disorder characterized by macrothrombocytopenia and gray-appearing platelets due to lack of platelet alpha granules. Mice homozygous for the Nbeal2 8 bp deletion (Nbeal2gps/gps) exhibit a phenotype similar to human GPS, with significantly reduced platelet counts compared to littermate controls (p = 1.63 x 10−7). Nbeal2gps/gps mice also have markedly reduced numbers of platelet alpha granules and an increased level of emperipolesis, consistent with previously characterized mice carrying targeted Nbeal2 null alleles. These findings confirm previous reports, provide an additional mouse model for GPS, and highlight the potentially confounding effect of background spontaneous mutation events in well-characterized mouse strains.
Collapse
Affiliation(s)
- Kärt Tomberg
- Department of Human Genetics, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Rami Khoriaty
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Randal J. Westrick
- Department of Biological Sciences, Oakland University, Rochester, Michigan, United States of America
| | | | | | - Gary L. Brodsky
- Department of Pediatrics, University of Colorado Denver, Aurora, Colorado, United States of America
| | - Pavel Davizon-Castillo
- Department of Pediatrics, University of Colorado Denver, Aurora, Colorado, United States of America
| | - David Ginsburg
- Department of Human Genetics, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, United States of America
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, United States of America
- Howard Hughes Medical Institute, University of Michigan, Ann Arbor, Michigan, United States of America
- * E-mail:
| | - Jorge Di Paola
- Department of Pediatrics, University of Colorado Denver, Aurora, Colorado, United States of America
- Human Medical Genetics and Genomics Program, University of Colorado Denver, Aurora, Colorado, United States of America
| |
Collapse
|
29
|
Grivas P, Devata S, Khoriaty R, Boonstra PS, Ruch JM, McDonnell K, Hernandez-Aya LF, Wilfong JM, Smerage JB, Ison MG, Eisenberg JNS, Silveira M, Cooney KA, Worden FP. Low-cost stepped intervention to increase influenza vaccination rates at a Comprehensive Cancer Center. J Clin Oncol 2015. [DOI: 10.1200/jco.2015.33.15_suppl.e17654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
| | | | | | | | | | - Kevin McDonnell
- University of Southern California Norris Comprehensive Cancer Center, Los Angeles, CA
| | | | | | | | | | | | - Maria Silveira
- Center for Clinical Management Research, Ann Arbor Veterans Affairs Medical Center; Department of Internal Medicine, University of Michigan, Ann Arbor, MI
| | | | | |
Collapse
|
30
|
Khoriaty R, Hussein MA, Faiman B, Kelly M, Kalaycio M, Baz R. Prediction of Response and Progression in Multiple Myeloma With Serum Free Light Chains Assay: Corroboration of the Serum Free Light Chain Response Definitions. Clinical Lymphoma Myeloma and Leukemia 2010; 10:E10-3. [DOI: 10.3816/clml.2010.n.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
31
|
Hanouneh IA, Khoriaty R, Zein NN. A 35-year-old Asian man with jaundice and markedly high aminotransferase levels. Cleve Clin J Med 2009; 76:449-56. [PMID: 19652038 DOI: 10.3949/ccjm.76a.08006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Ibrahim A Hanouneh
- Department of General Internal Medicine, Cleveland Clinic, Cleveland, OH 44195, USA
| | | | | |
Collapse
|
32
|
Abou-Merhi R, Khoriaty R, Arnoult D, El Hajj H, Dbouk H, Munier S, El-Sabban ME, Hermine O, Gessain A, de Thé H, Mahieux R, Bazarbachi A. PS-341 or a combination of arsenic trioxide and interferon-α inhibit growth and induce caspase-dependent apoptosis in KSHV/HHV-8-infected primary effusion lymphoma cells. Leukemia 2007; 21:1792-801. [PMID: 17568816 DOI: 10.1038/sj.leu.2404797] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Kaposi's sarcoma (KS)-associated herpes virus (KSHV) is the causative agent of primary effusion lymphoma and of KS. Primary effusion lymphoma (PEL) is an aggressive proliferation of B cells. Conventional chemotherapy has limited benefits in PEL patients, and the prognosis is very poor. We previously reported that treatment of human T-cell leukemia virus type 1 (HTLV-1)-associated adult T-cell leukemia/lymphoma cells either with arsenic trioxide (As) combined to interferon-alpha (IFN-alpha) or with the bortezomib (PS-341) proteasome inhibitor induces cell cycle arrest and apoptosis, partly due to the reversal of the constitutive nuclear factor-kappaB (NF-kappaB) activation. PEL cells also display an activated NF-kappaB pathway that is necessary for their survival. This prompted us to investigate the effects of PS-341, or of the As/IFN-alpha combination on PEL cells. A dramatic inhibition of cell proliferation and induction of apoptosis was observed in PS-341 and in As/IFN-alpha treated cells. This was associated with the dissipation of the mitochondrial membrane potential, cytosolic release of cytochrome c, caspase activation and was reversed by the z-VAD caspase inhibitor. PS-341 and As/IFN-alpha treatment abrogated NF-kappaB translocation to the nucleus and decreased the levels of the anti-apoptotic protein Bcl-X(L). Altogether, these results provide a rational basis for a future therapeutic use of PS-341 or combined As and IFN-alpha in PEL patients.
Collapse
Affiliation(s)
- R Abou-Merhi
- Department of Internal Medicine, American University of Beirut, Beirut, Lebanon
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Khoriaty R, Otrock ZK, Medawar WA, Khauli RB, Bazarbachi A. A case of successful double sequential bone marrow and kidney transplantations in a patient with multiple myeloma. Nephrol Dial Transplant 2006; 21:3585-8. [PMID: 16968731 DOI: 10.1093/ndt/gfl403] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Rami Khoriaty
- Department of Internal Medicine, American University of Beirut-Medical Center, PO Box 113-6044, Beirut, Lebanon
| | | | | | | | | |
Collapse
|
34
|
Abstract
Patients with severe haemophilia can be treated for bleeding either prophylactically or on demand. Each treatment modality has advantages and disadvantages from both a medical and economic point of view. This study aims to find which modality requires more units of clotting factors per body weight per year and to compare the number of bleeds between the two. The study sample consisted of 133 patients with severe haemophilia A and B treated in the Katharine Dormandy Haemophilia Centre at the Royal Free Hampstead NHS Trust in London. The average number of clotting factors used per body weight per year was 2181.7 units for prophylaxis vs. 711 units for on demand treatment (P = 0.000). Although more units used means more money spent, and although prophylaxis has additional complications, namely venipunctures and increased risk of viral contamination, other criteria must be considered including the total number of bleeds and health-related quality of life. The total number of bleeds per year was significantly (P = 0.021) less for prophylactically (7.4) vs. on-demand treated patients (11.4). This suggests that prophylaxis reduces the risk of arthropathies, the number of future hospital visits and orthopaedic surgeries, and is thus the optimal modality of treatment for patients with severe haemophilia.
Collapse
Affiliation(s)
- R Khoriaty
- Khatharine Dormandy Haemophilia Centre, Royal Free Hampstead NHS Trust, London, UK.
| | | | | | | |
Collapse
|