1
|
Lewis ED, Ortega EF, Dao MC, Barger K, Mason JB, Leong JM, Osburne MS, Magoun L, Nepveux FJ, Chishti AH, Schwake C, Quynh A, Gilhooly CH, Petty G, Guo W, Matuszek G, Pereira D, Reddy M, Wang J, Wu D, Meydani SN, Combs GF. Corrigendum: Safe and effective delivery of supplemental iron to healthy adults: a two-phase, randomized, double-blind trial - the safe iron study. Front Nutr 2024; 11:1376599. [PMID: 38476600 PMCID: PMC10927985 DOI: 10.3389/fnut.2024.1376599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 02/12/2024] [Indexed: 03/14/2024] Open
Abstract
[This corrects the article DOI: 10.3389/fnut.2023.1230061.].
Collapse
Affiliation(s)
- Erin D. Lewis
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Edwin F. Ortega
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Maria Carlota Dao
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Kathryn Barger
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Joel B. Mason
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - John M. Leong
- Department of Molecular Biology and Microbiology, Tufts University, Boston, MA, United States
| | - Marcia S. Osburne
- Department of Molecular Biology and Microbiology, Tufts University, Boston, MA, United States
| | - Loranne Magoun
- Department of Molecular Biology and Microbiology, Tufts University, Boston, MA, United States
| | - Felix J. Nepveux
- Department of Molecular Biology and Microbiology, Tufts University, Boston, MA, United States
| | - Athar H. Chishti
- Department of Developmental, Molecular and Chemical Biology, Tufts University, Boston, MA, United States
| | - Christopher Schwake
- Department of Developmental, Molecular and Chemical Biology, Tufts University, Boston, MA, United States
| | - Anh Quynh
- Department of Developmental, Molecular and Chemical Biology, Tufts University, Boston, MA, United States
| | - Cheryl H. Gilhooly
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Gayle Petty
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Weimin Guo
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Gregory Matuszek
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Dora Pereira
- Department of Pathology, University of Cambridge, Cambridge, United Kingdom
| | - Manju Reddy
- Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, United States
| | - Jifan Wang
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Dayong Wu
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Simin N. Meydani
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Gerald F. Combs
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| |
Collapse
|
2
|
Schwake CJ, Krueger RM, Hanada T, Chishti AH. Plasmodium falciparum glutamic acid-rich protein (PfGARP)-independent polyclonal antibodies inhibit malaria parasite growth in human erythrocytes. J Infect Dis 2024:jiae050. [PMID: 38298126 DOI: 10.1093/infdis/jiae050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/20/2023] [Accepted: 01/26/2024] [Indexed: 02/02/2024] Open
Abstract
PfGARP is a recently characterized cell surface antigen encoded by Plasmodium falciparum, the causative agent of severe human malaria pathophysiology. Previously, we reported that the human erythrocyte band 3 (SLC4A1) serves as a host receptor for PfGARP. Antibodies against PfGARP did not affect parasite invasion and growth. We surmised that PfGARP may play a role in the rosetting and adhesion of malaria. Another study reported that antibodies targeting PfGARP exhibit potent inhibition of parasite growth. This inhibition occurred without the presence of any immune or complement components, suggesting the activation of an inherent density-dependent regulatory system. Here, we used polyclonal antibodies against PfGARP and a monoclonal antibody mAb78993 to demonstrate that anti-PfGARP polyclonal antibodies, but not mAb7899, exerted potent inhibition of parasite growth in infected erythrocytes independent of PfGARP. These findings suggest that an unknown malaria protein(s) is the target of growth arrest by polyclonal antibodies raised against PfGARP.
Collapse
Affiliation(s)
- Christopher J Schwake
- Program in Cellular, Molecular & Developmental Biology, Graduate School of Biomedical Sciences
| | - Rachel M Krueger
- Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Toshihiko Hanada
- Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Athar H Chishti
- Program in Cellular, Molecular & Developmental Biology, Graduate School of Biomedical Sciences
- Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, USA
| |
Collapse
|
3
|
Lewis ED, Ortega EF, Dao MC, Barger K, Mason JB, Leong JM, Osburne MS, Magoun L, Nepveux V FJ, Chishti AH, Schwake C, Quynh A, Gilhooly CH, Petty G, Guo W, Matuszek G, Pereira D, Reddy M, Wang J, Wu D, Meydani SN, Combs GF. Safe and effective delivery of supplemental iron to healthy adults: a two-phase, randomized, double-blind trial - the safe iron study. Front Nutr 2023; 10:1230061. [PMID: 37899826 PMCID: PMC10603204 DOI: 10.3389/fnut.2023.1230061] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Accepted: 08/28/2023] [Indexed: 10/31/2023] Open
Abstract
Introduction The safety of novel forms of iron in healthy, iron-replete adults as might occur if used in population-based iron supplementation programs was examined. We tested the hypotheses that supplementation with nanoparticulate iron hydroxide adipate tartrate (IHAT), an iron-enriched Aspergillus oryzae product (ASP), or ferrous sulphate heptahydrate (FS) are safe as indicated by erythrocyte susceptibility to malarial infection, bacterial proliferation, and gut inflammation. Responses to FS administered daily or weekly, and with or without other micronutrients were compared. Methods Two phases of randomized, double-blinded trials were conducted in Boston, MA. Phase I randomized 160 volunteers to six treatments: placebo, IHAT, ASP, FS, and FS plus a micronutrient powder (MNP) administrated daily at 60 mg Fe/day; and FS administered as a single weekly dose of 420 mg Fe. Phase II randomized 86 volunteers to IHAT, ASP, or FS administered at 120 mg Fe/day. Completing these phases were 151 and 77 participants, respectively. The study was powered to detect effects on primary endpoints: susceptibility of participant erythrocytes to infection by Plasmodium falciparum, the proliferation potential of selected pathogenic bacteria in sera, and markers of gut inflammation. Secondary endpoints for which the study was not powered included indicators of iron status and gastrointestinal symptoms. Results Supplementation with any form of iron did not affect any primary endpoint. In Phase I, the frequency of gastrointestinal symptoms associated with FS was unaffected by dosing with MNP or weekly administration; but participants taking IHAT more frequently reported abdominal pain (27%, p < 0.008) and nausea (4%, p = 0.009) than those taking FS, while those taking ASP more frequently reported nausea (8%, p = 0.009). Surprisingly, only 9% of participants taking IHAT at 120 mg Fe/day (Phase II) reported abdominal pain and no other group reported that symptom. Discussion With respect to the primary endpoints, few differences were found when comparing these forms of iron, indicating that 28 days of 60 or 120 mg/day of IHAT, ASP, or FS may be safe for healthy, iron-replete adults. With respect to other endpoints, subjects receiving IHAT more frequently reported abdominal pain and nausea, suggesting the need for further study. Clinical Trial Registration ClinicalTrials.gov, NCT03212677; registered: 11 July 2017.
Collapse
Affiliation(s)
- Erin D. Lewis
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Edwin F. Ortega
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Maria Carlota Dao
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Kathryn Barger
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Joel B. Mason
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - John M. Leong
- Department of Molecular Biology and Microbiology, Tufts University, Boston, MA, United States
| | - Marcia S. Osburne
- Department of Molecular Biology and Microbiology, Tufts University, Boston, MA, United States
| | - Loranne Magoun
- Department of Molecular Biology and Microbiology, Tufts University, Boston, MA, United States
| | - Felix J. Nepveux V
- Department of Molecular Biology and Microbiology, Tufts University, Boston, MA, United States
| | - Athar H. Chishti
- Department of Developmental, Molecular and Chemical Biology, Tufts University, Boston, MA, United States
| | - Christopher Schwake
- Department of Developmental, Molecular and Chemical Biology, Tufts University, Boston, MA, United States
| | - Anh Quynh
- Department of Developmental, Molecular and Chemical Biology, Tufts University, Boston, MA, United States
| | - Cheryl H. Gilhooly
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Gayle Petty
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Weimin Guo
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Gregory Matuszek
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Dora Pereira
- Department of Pathology, University of Cambridge, Cambridge, United Kingdom
| | - Manju Reddy
- Department of Food Science and Human Nutrition, Iowa State University, Ames, IA, United States
| | - Jifan Wang
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Dayong Wu
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Simin N. Meydani
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| | - Gerald F. Combs
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, United States
| |
Collapse
|
4
|
Fritz DI, Ding Y, Merrill-Skoloff G, Flaumenhaft R, Hanada T, Chishti AH. Dematin Regulates Calcium Mobilization, Thrombosis, and Early Akt Activation in Platelets. Mol Cell Biol 2023:1-17. [PMID: 37216480 DOI: 10.1080/10985549.2023.2210033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/19/2023] [Accepted: 04/21/2023] [Indexed: 05/24/2023] Open
Abstract
The complex intrinsic and extrinsic pathways contributing to platelet activation profoundly impact hemostasis and thrombosis. Detailed cellular mechanisms that regulate calcium mobilization, Akt activation, and integrin signaling in platelets remain incompletely understood. Dematin is a broadly expressed actin binding and bundling cytoskeletal adaptor protein regulated by phosphorylation via cAMP-dependent protein kinase. Here, we report the development of a conditional mouse model specifically lacking dematin in platelets. Using the new mouse model termed PDKO, we provide direct evidence that dematin is a major regulator of calcium mobilization, and its genetic deletion inhibits the early phase of Akt activation in response to collagen and thrombin agonists in platelets. The aberrant platelet shape change, clot retraction, and in vivo thrombosis observed in PDKO mice will enable future characterization of dematin-mediated integrin activation mechanisms in thrombogenic as well as nonvascular pathologies.
Collapse
Affiliation(s)
- Daniel I Fritz
- Programs in Cellular, Molecular and Developmental Biology, Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Yiwen Ding
- Pharmacology and Drug Development, Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Glenn Merrill-Skoloff
- Division of Hemostasis and Thrombosis, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Robert Flaumenhaft
- Division of Hemostasis and Thrombosis, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Toshihiko Hanada
- Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Athar H Chishti
- Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, Massachusetts, USA
| |
Collapse
|
5
|
Schwake C, McKay L, Griffiths A, Scartelli C, Flaumenhaft R, Chishti AH. BDA-410 inhibits SARS-CoV-2 main protease activity and viral replication in mammalian cells. J Cell Mol Med 2022; 26:5095-5098. [PMID: 36082511 PMCID: PMC9537889 DOI: 10.1111/jcmm.17442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/08/2022] [Indexed: 11/29/2022] Open
Affiliation(s)
- Christopher Schwake
- Department of Developmental, Molecular, and Chemical Biology, Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts, USA
| | - Lindsay McKay
- National Emerging Infectious Diseases Laboratories (NEIDL), Department of Microbiology, Boston University, Boston, Massachusetts, USA
| | - Anthony Griffiths
- National Emerging Infectious Diseases Laboratories (NEIDL), Department of Microbiology, Boston University, Boston, Massachusetts, USA
| | - Christina Scartelli
- Division of Hemostasis and Thrombosis, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Robert Flaumenhaft
- Division of Hemostasis and Thrombosis, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Athar H Chishti
- Department of Developmental, Molecular, and Chemical Biology, Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, Massachusetts, USA
| |
Collapse
|
6
|
Zhou R, Han B, Nowak R, Lu Y, Heller E, Xia C, Chishti AH, Fowler VM, Zhuang X. Proteomic and functional analyses of the periodic membrane skeleton in neurons. Nat Commun 2022; 13:3196. [PMID: 35680881 PMCID: PMC9184744 DOI: 10.1038/s41467-022-30720-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 05/09/2022] [Indexed: 12/29/2022] Open
Abstract
Actin, spectrin, and associated molecules form a membrane-associated periodic skeleton (MPS) in neurons. The molecular composition and functions of the MPS remain incompletely understood. Here, using co-immunoprecipitation and mass spectrometry, we identified hundreds of potential candidate MPS-interacting proteins that span diverse functional categories. We examined representative proteins in several of these categories using super-resolution imaging, including previously unknown MPS structural components, as well as motor proteins, cell adhesion molecules, ion channels, and signaling proteins, and observed periodic distributions characteristic of the MPS along the neurites for ~20 proteins. Genetic perturbations of the MPS and its interacting proteins further suggested functional roles of the MPS in axon-axon and axon-dendrite interactions and in axon diameter regulation, and implicated the involvement of MPS interactions with cell adhesion molecules and non-muscle myosin in these roles. These results provide insights into the interactome of the MPS and suggest previously unknown functions of the MPS in neurons.
Collapse
Affiliation(s)
- Ruobo Zhou
- Howard Hughes Medical Institute, Harvard University, Cambridge, MA, 02138, USA.
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA.
- Department of Physics, Harvard University, Cambridge, MA, 02138, USA.
- Department of Chemistry, The Pennsylvania State University, University Park, PA, 16802, USA.
| | - Boran Han
- Howard Hughes Medical Institute, Harvard University, Cambridge, MA, 02138, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
- Department of Physics, Harvard University, Cambridge, MA, 02138, USA
| | - Roberta Nowak
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, 92307, USA
| | - Yunzhe Lu
- Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA, 02111, USA
| | - Evan Heller
- Howard Hughes Medical Institute, Harvard University, Cambridge, MA, 02138, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
- Department of Physics, Harvard University, Cambridge, MA, 02138, USA
| | - Chenglong Xia
- Howard Hughes Medical Institute, Harvard University, Cambridge, MA, 02138, USA
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA
- Department of Physics, Harvard University, Cambridge, MA, 02138, USA
| | - Athar H Chishti
- Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA, 02111, USA
| | - Velia M Fowler
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, 92307, USA
- Department of Biological Sciences, The University of Delaware, Newark, DE, 19716, USA
| | - Xiaowei Zhuang
- Howard Hughes Medical Institute, Harvard University, Cambridge, MA, 02138, USA.
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA.
- Department of Physics, Harvard University, Cambridge, MA, 02138, USA.
| |
Collapse
|
7
|
Abstract
INTRODUCTION Signal peptide peptidase (SPP) is a GxGD-type intramembrane-cleaving aspartyl protease responsible for clearing accumulating signal peptides in the endoplasmic reticulum. SPP is conserved among all kingdoms and is essential for maintaining cell homeostasis. Inhibition of SPP with selective inhibitors and the structurally similar HIV protease inhibitors results in signal peptide accumulation and subsequent cell death. Identification of SPP homologues in major human parasitic infections has opened a new therapeutic opportunity. Moreover, the essentiality of mammalian SPP-mediated viral protein processing during infection is emerging. AREAS COVERED This review introduces the discovery and biological function of human SPP enzymes and identify parasitic homologues as pharmacological targets of both SPP and HIV protease inhibitors. Later, the role of mammalian SPP during viral infection and how disruption of host SPP can be employed as a novel antiviral therapy are examined and discussed. EXPERT OPINION Parasitic and viral infections cause severe health and economic burden, exacerbated by the lack of new therapeutics in the pipeline. SPP has been shown to be essential for malaria parasite growth and encouraging evidence in other parasites demonstrates broad essentiality of these proteases as therapeutic targets. As drug resistant parasite and viruses emerge, SPP inhibition will provide a new generation of compounds to counter the growing threat of antimicrobial resistance.
Collapse
Affiliation(s)
- Christopher Schwake
- Department of Developmental, Molecular, and Chemical Biology, Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, MA, USA
| | - Michael Hyon
- Department of Developmental, Molecular, and Chemical Biology, Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, MA, USA
| | - Athar H Chishti
- Department of Developmental, Molecular, and Chemical Biology, Graduate School of Biomedical Sciences, Tufts University School of Medicine, Boston, MA, USA
| |
Collapse
|
8
|
Mithila F, Schwake C, Fang C, Merrill-Skoloff G, Covic L, Fritz DI, Hanada T, Flaumenhaft R, Chishti AH. Calpain-1 inhibition attenuates in vivo thrombosis in a humanized model of sickle cell disease. Thromb Res 2022; 211:123-126. [DOI: 10.1016/j.thromres.2022.01.029] [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] [Received: 12/08/2021] [Revised: 01/27/2022] [Accepted: 01/31/2022] [Indexed: 11/15/2022]
|
9
|
Weber JJ, Haas E, Maringer Y, Hauser S, Casadei NLP, Chishti AH, Riess O, Hübener-Schmid J. Calpain-1 ablation partially rescues disease-associated hallmarks in models of Machado-Joseph disease. Hum Mol Genet 2021; 29:892-906. [PMID: 31960910 DOI: 10.1093/hmg/ddaa010] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 01/14/2020] [Accepted: 01/16/2020] [Indexed: 12/13/2022] Open
Abstract
Proteolytic fragmentation of polyglutamine-expanded ataxin-3 is a concomitant and modifier of the molecular pathogenesis of Machado-Joseph disease (MJD), the most common autosomal dominant cerebellar ataxia. Calpains, a group of calcium-dependent cysteine proteases, are important mediators of ataxin-3 cleavage and implicated in multiple neurodegenerative conditions. Pharmacologic and genetic approaches lowering calpain activity showed beneficial effects on molecular and behavioural disease characteristics in MJD model organisms. However, specifically targeting one of the calpain isoforms by genetic means has not yet been evaluated as a potential therapeutic strategy. In our study, we tested whether calpains are overactivated in the MJD context and if reduction or ablation of calpain-1 expression ameliorates the disease-associated phenotype in MJD cells and mice. In all analysed MJD models, we detected an elevated calpain activity at baseline. Lowering or removal of calpain-1 in cells or mice counteracted calpain system overactivation and led to reduced cleavage of ataxin-3 without affecting its aggregation. Moreover, calpain-1 knockout in YAC84Q mice alleviated excessive fragmentation of important synaptic proteins. Despite worsening some motor characteristics, YAC84Q mice showed a rescue of body weight loss and extended survival upon calpain-1 knockout. Together, our findings emphasize the general potential of calpains as a therapeutic target in MJD and other neurodegenerative diseases.
Collapse
Affiliation(s)
- Jonasz J Weber
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen 72076, Germany.,Centre for Rare Diseases, University of Tübingen, Tübingen 72076, Germany.,Department of Human Genetics, Ruhr-University Bochum, Bochum 44801, Germany
| | - Eva Haas
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen 72076, Germany.,Centre for Rare Diseases, University of Tübingen, Tübingen 72076, Germany
| | - Yacine Maringer
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen 72076, Germany.,Centre for Rare Diseases, University of Tübingen, Tübingen 72076, Germany
| | - Stefan Hauser
- German Center for Neurodegenerative Diseases, Tübingen 72076, Germany
| | - Nicolas L P Casadei
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen 72076, Germany.,Centre for Rare Diseases, University of Tübingen, Tübingen 72076, Germany
| | - Athar H Chishti
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Olaf Riess
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen 72076, Germany.,Centre for Rare Diseases, University of Tübingen, Tübingen 72076, Germany
| | - Jeannette Hübener-Schmid
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen 72076, Germany.,Centre for Rare Diseases, University of Tübingen, Tübingen 72076, Germany
| |
Collapse
|
10
|
Lewis ED, Wu D, Mason JB, Chishti AH, Leong JM, Barger K, Meydani SN, Combs GF. Safe and effective delivery of supplemental iron to healthy older adults: The double-blind, randomized, placebo-controlled trial protocol of the Safe Iron Study. Gates Open Res 2021; 3:1510. [PMID: 33655197 PMCID: PMC7890045 DOI: 10.12688/gatesopenres.13039.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/01/2021] [Indexed: 11/23/2022] Open
Abstract
The forms of iron currently available to correct iron deficiency have adverse effects, including infectious diarrhea, increased susceptibility to malaria, inflammation and detrimental changes to the gut microbiome. These adverse effects limit their use such that the growing burden of iron deficiency has not abated in recent decades. Here, we summarize the protocol of the "Safe Iron Study", the first clinical study examining the safety and efficacy of novel forms of iron in healthy, iron-replete adults. The Safe Iron Study is a double-blind, randomized, placebo-controlled trial conducted in Boston, MA, USA. This study compares ferrous sulfate heptahydrate (FeSO 4·H 2O) with two novel forms of iron supplements (iron hydroxide adipate tartrate (IHAT) and organic fungal iron metabolite (Aspiron™ Natural Koji Iron)). In Phase I, we will compare each source of iron administrated at a low dose (60 mg Fe/day). We will also determine the effect of FeSO 4 co-administrated with a multiple micronutrient powder and weekly administration of FeSO 4. The forms of iron found to produce no adverse effects, or adverse effects no greater than FeSO 4 in Phase I, Phase II will evaluate a higher, i.e., a therapeutic dose (120 mg Fe/day). The primary outcomes of this study include ex vivo malaria ( Plasmodium falciparum) infectivity of host erythrocytes, ex vivo bacterial proliferation (of selected species) in presence of host plasma and intestinal inflammation assessed by fecal calprotectin. This study will test the hypotheses that the novel forms of iron, administered at equivalent doses to FeSO 4, will produce similar increases in iron status in iron-replete subjects, yet lower increases in ex vivo malaria infectivity, ex vivo bacterial proliferation, gut inflammation. Ultimately, this study seeks to contribute to development of safe and effective forms of supplemental iron to address the global burden of iron deficiency and anemia. Registration: ClinicalTrials.gov identifier: NCT03212677; registered: 11 July 2017.
Collapse
Affiliation(s)
- Erin D. Lewis
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| | - Dayong Wu
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| | - Joel B. Mason
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| | - Athar H. Chishti
- Department of Developmental, Molecular and Chemical Biology, Tufts University, Boston, Massachusetts, 02111, USA
| | - John M. Leong
- Department of Molecular Biology and Microbiology, Tufts University, Boston, Massachusetts, 02111, USA
| | - Kathryn Barger
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| | - Simin N. Meydani
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| | - Gerald F. Combs
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| |
Collapse
|
11
|
Mills J, Hanada T, Hase Y, Liscum L, Chishti AH. LDL receptor related protein 1 requires the I 3 domain of discs-large homolog 1/DLG1 for interaction with the kinesin motor protein KIF13B. Biochim Biophys Acta Mol Cell Res 2019; 1866:118552. [PMID: 31487503 DOI: 10.1016/j.bbamcr.2019.118552] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 07/25/2019] [Accepted: 08/12/2019] [Indexed: 01/01/2023]
Abstract
KIF13B, a kinesin-3 family motor, was originally identified as GAKIN due to its biochemical interaction with human homolog of Drosophila discs-large tumor suppressor (hDLG1). Unlike its homolog KIF13A, KIF13B contains a carboxyl-terminal CAP-Gly domain. To investigate the function of the CAP-Gly domain, we developed a mouse model that expresses a truncated form of KIF13B protein lacking its CAP-Gly domain (KIF13BΔCG), whereas a second mouse model lacks the full-length KIF13A. Here we show that the KIF13BΔCG mice exhibit relatively higher serum cholesterol consistent with the reduced uptake of [3H]CO-LDL in KIF13BΔCG mouse embryo fibroblasts. The plasma level of factor VIII was not significantly elevated in the KIF13BΔCG mice, suggesting that the CAP-Gly domain region of KIF13B selectively regulates LRP1-mediated lipoprotein endocytosis. No elevation of either serum cholesterol or plasma factor VIII was observed in the full length KIF13A null mouse model. The deletion of the CAP-Gly domain region caused subcellular mislocalization of truncated KIF13B concomitant with the mislocalization of LRP1. Mechanistically, the cytoplasmic domain of LRP1 interacts specifically with the alternatively spliced I3 domain of DLG1, which complexes with KIF13B via their GUK-MBS domains, respectively. Importantly, double mutant mice generated by crossing KIF13A null and KIF13BΔCG mice suffer from perinatal lethality showing potential craniofacial defects. Together, this study provides first evidence that the carboxyl-terminal region of KIF13B containing the CAP-Gly domain is important for the LRP1-DLG1-KIF13B complex formation with implications in the regulation of metabolism, cell polarity, and development.
Collapse
Affiliation(s)
- Joslyn Mills
- Graduate Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, MA, USA
| | - Toshihiko Hanada
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA, USA
| | - Yoichi Hase
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA, USA
| | - Laura Liscum
- Graduate Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, MA, USA; Department of Immunology, Tufts University School of Medicine, Boston, MA, USA
| | - Athar H Chishti
- Graduate Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, MA, USA; Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA, USA.
| |
Collapse
|
12
|
Lewis ED, Wu D, Mason JB, Chishti AH, Leong JM, Barger K, Meydani SN, Combs GF. Safe and effective delivery of supplemental iron to healthy older adults: The double-blind, randomized, placebo-controlled trial protocol of the Safe Iron Study. Gates Open Res 2019; 3:1510. [PMID: 33655197 PMCID: PMC7890045 DOI: 10.12688/gatesopenres.13039.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/03/2019] [Indexed: 09/20/2023] Open
Abstract
The forms of iron currently available to correct iron deficiency have adverse effects, including infectious diarrhea, increased susceptibility to malaria, inflammation and detrimental changes to the gut microbiome. These adverse effects limit their use such that the growing burden of iron deficiency has not abated in recent decades. Here, we summarize the protocol of the "Safe Iron Study", the first clinical study examining the safety and efficacy of novel forms of iron in healthy, iron-replete adults. The Safe Iron Study is a double-blind, randomized, placebo-controlled trial conducted in Boston, MA, USA. This study compares ferrous sulfate heptahydrate (FeSO 4·H 2O) with two novel forms of iron supplements (iron hydroxide adipate tartrate (IHAT) and organic fungal iron metabolite (Aspiron™ Natural Koji Iron)). In Phase I, we will compare each source of iron administrated at a low dose (60 mg Fe/day). We will also determine the effect of FeSO 4 co-administrated with a multiple micronutrient powder and weekly administration of FeSO 4. The forms of iron found to produce no adverse effects or adverse effects no greater than FeSO 4 in Phase I, Phase II will evaluate a higher, i.e., a therapeutic dose (120 mg Fe/day). The primary outcomes of this study include ex vivo malaria ( Plasmodium falciparum) infectivity of host erythrocytes, ex vivo bacterial proliferation (of selected species) in presence of host plasma and intestinal inflammation assessed by fecal calprotectin. This study will test the hypotheses that the novel forms of iron, administered at equivalent doses to FeSO 4, will produce similar increases in iron status in iron-replete subjects, yet lower increases in ex vivo malaria infectivity, ex vivo bacterial proliferation, gut inflammation. Ultimately, this study seeks to contribute to development of safe and effective forms of supplemental iron to address the global burden of iron deficiency and anemia. Registration: ClinicalTrials.gov identifier: NCT03212677; registered: 11 July 2017.
Collapse
Affiliation(s)
- Erin D. Lewis
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| | - Dayong Wu
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| | - Joel B. Mason
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| | - Athar H. Chishti
- Department of Developmental, Molecular and Chemical Biology, Tufts University, Boston, Massachusetts, 02111, USA
| | - John M. Leong
- Department of Molecular Biology and Microbiology, Tufts University, Boston, Massachusetts, 02111, USA
| | - Kathryn Barger
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| | - Simin N. Meydani
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| | - Gerald F. Combs
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts, 02111, USA
| |
Collapse
|
13
|
Fritz DI, Hanada T, Lu Y, Martin Johnston J, Chishti AH. MPP1/p55 gene deletion in a hemophilia A patient with ectrodactyly and severe developmental defects. Am J Hematol 2019; 94:E29-E32. [PMID: 30358901 DOI: 10.1002/ajh.25323] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 10/17/2018] [Accepted: 10/20/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Daniel I. Fritz
- Department of Developmental, Molecular, and Chemical Biology; Tufts University School of Medicine; Boston Massachusetts
- Sackler School of Graduate Biomedical Sciences, Program in Cellular, Molecular, and Developmental Biology; Tufts University School of Medicine; Boston Massachusetts
| | - Toshihiko Hanada
- Department of Developmental, Molecular, and Chemical Biology; Tufts University School of Medicine; Boston Massachusetts
| | - Yunzhe Lu
- Department of Developmental, Molecular, and Chemical Biology; Tufts University School of Medicine; Boston Massachusetts
| | - J. Martin Johnston
- Hematology/Oncology; The Children's Hospital at Memorial University Medical Center, Mercer University School of Medicine; Savannah Georgia
| | - Athar H. Chishti
- Department of Developmental, Molecular, and Chemical Biology; Tufts University School of Medicine; Boston Massachusetts
- Sackler School of Graduate Biomedical Sciences, Program in Cellular, Molecular, and Developmental Biology; Tufts University School of Medicine; Boston Massachusetts
| |
Collapse
|
14
|
Nwankwo JO, Gremmel T, Gerrits AJ, Mithila FJ, Warburton RR, Hill NS, Lu Y, Richey LJ, Jakubowski JA, Frelinger AL, Chishti AH. Calpain-1 regulates platelet function in a humanized mouse model of sickle cell disease. Thromb Res 2017; 160:58-65. [PMID: 29101791 DOI: 10.1016/j.thromres.2017.10.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 05/30/2017] [Revised: 10/02/2017] [Accepted: 10/26/2017] [Indexed: 12/18/2022]
Abstract
One of the major contributors to sickle cell disease (SCD) pathobiology is the hemolysis of sickle red blood cells (RBCs), which release free hemoglobin and platelet agonists including adenosine 5'-diphosphate (ADP) into the plasma. While platelet activation/aggregation may promote tissue ischemia and pulmonary hypertension in SCD, modulation of sickle platelet dysfunction remains poorly understood. Calpain-1, a ubiquitous calcium-activated cysteine protease expressed in hematopoietic cells, mediates aggregation of platelets in healthy mice. We generated calpain-1 knockout Townes sickle (SSCKO) mice to investigate the role of calpain-1 in steady state and hypoxia/reoxygenation (H/R)-induced sickle platelet activation and aggregation, clot retraction, and pulmonary arterial hypertension. Using multi-electrode aggregometry, which measures platelet adhesion and aggregation in whole blood, we determined that steady state SSCKO mice exhibit significantly impaired PAR4-TRAP-stimulated platelet aggregation as compared to Townes sickle (SS) and humanized control (AA) mice. Interestingly, the H/R injury induced platelet hyperactivity in SS and SSCKO, but not AA mice, and partially rescued the aggregation defect in SSCKO mice. The PAR4-TRAP-stimulated GPIIb-IIIa (αIIbβ3) integrin activation was normal in SSCKO platelets suggesting that an alternate mechanism mediates the impaired platelet aggregation in steady state SSCKO mice. Taken together, we provide the first evidence that calpain-1 regulates platelet hyperactivity in sickle mice, and may offer a viable pharmacological target to reduce platelet hyperactivity in SCD.
Collapse
Affiliation(s)
- Jennifer O Nwankwo
- Graduate Program in Pharmacology and Experimental Therapeutics, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, MA, USA
| | - Thomas Gremmel
- Center for Platelet Research Studies, Division of Hematology/Oncology, Boston Children's Hospital, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Anja J Gerrits
- Center for Platelet Research Studies, Division of Hematology/Oncology, Boston Children's Hospital, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Farha J Mithila
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA, USA
| | - Rod R Warburton
- Division of Pulmonary, Critical Care and Sleep Medicine, Tufts Medical Center, Boston, MA, USA
| | - Nicholas S Hill
- Division of Pulmonary, Critical Care and Sleep Medicine, Tufts Medical Center, Boston, MA, USA
| | - Yunzhe Lu
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA, USA
| | - Lauren J Richey
- Division of Laboratory Animal Medicine, Tufts University, Boston, MA, USA
| | | | - Andrew L Frelinger
- Center for Platelet Research Studies, Division of Hematology/Oncology, Boston Children's Hospital, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Athar H Chishti
- Graduate Program in Pharmacology and Experimental Therapeutics, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, MA, USA; Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA, USA.
| |
Collapse
|
15
|
Schiemer J, Bohm A, Lin L, Merrill-Skoloff G, Flaumenhaft R, Huang JS, Le Breton GC, Chishti AH. Gα13 Switch Region 2 Relieves Talin Autoinhibition to Activate αIIbβ3 Integrin. J Biol Chem 2016; 291:26598-26612. [PMID: 27803165 DOI: 10.1074/jbc.m116.747279] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 10/28/2016] [Indexed: 11/06/2022] Open
Abstract
Integrins function as bi-directional signaling transducers that regulate cell-cell and cell-matrix signals across the membrane. A key modulator of integrin activation is talin, a large cytoskeletal protein that exists in an autoinhibited state in quiescent cells. Talin is a large 235-kDa protein composed of an N-terminal 45-kDa FERM (4.1, ezrin-, radixin-, and moesin-related protein) domain, also known as the talin head domain, and a series of helical bundles known as the rod domain. The talin head domain consists of four distinct lobes designated as F0-F3. Integrin binding and activation are mediated through the F3 region, a critically regulated domain in talin. Regulation of the F3 lobe is accomplished through autoinhibition via anti-parallel dimerization. In the anti-parallel dimerization model, the rod domain region of one talin molecule binds to the F3 lobe on an adjacent talin molecule, thus achieving the state of autoinhibition. Platelet functionality requires integrin activation for adherence and thrombus formation, and thus regulation of talin presents a critical node where pharmacological intervention is possible. A major mechanism of integrin activation in platelets is through heterotrimeric G protein signaling regulating hemostasis and thrombosis. Here, we provide evidence that switch region 2 (SR2) of the ubiquitously expressed G protein (Gα13) directly interacts with talin, relieves its state of autoinhibition, and triggers integrin activation. Biochemical analysis of Gα13 shows SR2 binds directly to the F3 lobe of talin's head domain and competes with the rod domain for binding. Intramolecular FRET analysis shows Gα13 can relieve autoinhibition in a cellular milieu. Finally, a myristoylated SR2 peptide shows demonstrable decrease in thrombosis in vivo Altogether, we present a mechanistic basis for the regulation of talin through Gα13.
Collapse
Affiliation(s)
- James Schiemer
- From the Department of Developmental, Molecular, and Chemical Biology.,Sackler School of Graduate Biomedical Sciences, Programs in Cellular and Molecular Physiology
| | - Andrew Bohm
- From the Department of Developmental, Molecular, and Chemical Biology
| | - Li Lin
- From the Department of Developmental, Molecular, and Chemical Biology.,Pharmacology and Experimental Therapeutics and Molecular Microbiology, Tufts University School of Medicine, Boston, Massachusetts 02111
| | - Glenn Merrill-Skoloff
- the Division of Hemostasis and Thrombosis, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02115
| | - Robert Flaumenhaft
- the Division of Hemostasis and Thrombosis, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02115
| | - Jin-Sheng Huang
- the Research Resources Center, Protein Research Laboratory, University of Illinois at Chicago, Chicago, Illinois 60612, and
| | - Guy C Le Breton
- the Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612
| | - Athar H Chishti
- From the Department of Developmental, Molecular, and Chemical Biology, .,Sackler School of Graduate Biomedical Sciences, Programs in Cellular and Molecular Physiology.,Pharmacology and Experimental Therapeutics and Molecular Microbiology, Tufts University School of Medicine, Boston, Massachusetts 02111
| |
Collapse
|
16
|
Ranjan R, Karpurapu M, Rani A, Chishti AH, Christman JW. Hemozoin Regulates iNOS Expression by Modulating the Transcription Factor NF-κB in Macrophages. ACTA ACUST UNITED AC 2016; 2. [PMID: 27790644 DOI: 10.21767/2471-8084.100019] [Citation(s) in RCA: 5] [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] [Indexed: 11/25/2022]
Abstract
Hemozoin (Hz) is released from ruptured erythrocytes during malaria infection caused by Plasmodium sp., in addition the malaria infected individuals are prone to bacterial sepsis. The molecular interactions between Hz, bacterial components and macrophages remains poorly investigated. In this report, we investigated the combinatorial immune-modulatory effects of phagocytosed Hz, Interferon gamma (IFNγ) or lipopolysaccharide (LPS) in macrophages. Macrophages were treated with various concentrations of commercial synthetic Hz, and surprisingly it did not result in inducible nitric oxide synthase (iNOS) expression. However, when macrophages were pretreated with Hz and then challenged with IFNγ or LPS, there was a differential impact on iNOS expression. There was an increase in iNOS expression when macrophages were pre-treated with Hz and subsequently treated with IFNγ when compared to IFNγ alone. Whereas iNOS expression was reduced when Hz phagocytosed macrophages were stimulated with LPS compared to LPS alone. Furthermore, there was an increased activation of NF-κB in Hz phagocytosed macrophages that were challenged with IFNγ. The interaction between Hz and macrophages has an impact on iNOS expression.
Collapse
Affiliation(s)
- Ravi Ranjan
- Department of Medicine, University of Illinois, Chicago, Illinois, USA
| | - Manjula Karpurapu
- Department of Internal Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep, The Ohio State University, Columbus, Ohio, USA
| | - Asha Rani
- Department of Medicine, University of Illinois, Chicago, Illinois, USA
| | - Athar H Chishti
- Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, USA
| | - John W Christman
- Department of Internal Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep, The Ohio State University, Columbus, Ohio, USA
| |
Collapse
|
17
|
Nwankwo JO, Lei J, Xu J, Rivera A, Gupta K, Chishti AH. Genetic inactivation of calpain-1 attenuates pain sensitivity in a humanized mouse model of sickle cell disease. Haematologica 2016; 101:e397-e400. [PMID: 27418647 DOI: 10.3324/haematol.2016.148106] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Jennifer O Nwankwo
- Graduate Program in Pharmacology and Experimental Therapeutics, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, MA
| | - Jianxun Lei
- Vascular Biology Center, Division of Hematology, Oncology and Transplantation, Department of Medicine, University of Minnesota, Minneapolis, MN
| | - Jian Xu
- Children's Medical Center Research Institute, University of Texas Southwestern Medical Center, Dallas, TX
| | - Alicia Rivera
- Department of Laboratory Medicine, Boston Children's Hospital and Department of Pathology, Harvard Medical School, Boston, MA
| | - Kalpna Gupta
- Vascular Biology Center, Division of Hematology, Oncology and Transplantation, Department of Medicine, University of Minnesota, Minneapolis, MN
| | - Athar H Chishti
- Graduate Program in Pharmacology and Experimental Therapeutics, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, MA Department of Developmental, Molecular and Chemical Biology, Tufts University School of Medicine, Boston, MA, USA
| |
Collapse
|
18
|
Howatt DA, Balakrishnan A, Moorleghen JJ, Muniappan L, Rateri DL, Uchida HA, Takano J, Saido TC, Chishti AH, Baud L, Subramanian V. Leukocyte Calpain Deficiency Reduces Angiotensin II-Induced Inflammation and Atherosclerosis But Not Abdominal Aortic Aneurysms in Mice. Arterioscler Thromb Vasc Biol 2016; 36:835-45. [PMID: 26966280 DOI: 10.1161/atvbaha.116.307285] [Citation(s) in RCA: 30] [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: 03/09/2015] [Accepted: 02/27/2016] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Angiotensin II (AngII) infusion profoundly increases activity of calpains, calcium-dependent neutral cysteine proteases, in mice. Pharmacological inhibition of calpains attenuates AngII-induced aortic medial macrophage accumulation, atherosclerosis, and abdominal aortic aneurysm in mice. However, the precise functional contribution of leukocyte-derived calpains in AngII-induced vascular pathologies has not been determined. The purpose of this study was to determine whether calpains expressed in bone marrow (BM)-derived cells contribute to AngII-induced atherosclerosis and aortic aneurysms in hypercholesterolemic mice. APPROACH AND RESULTS To study whether leukocyte calpains contributed to AngII-induced aortic pathologies, irradiated male low-density lipoprotein receptor(-/-) mice were repopulated with BM-derived cells that were either wild-type or overexpressed calpastatin, the endogenous inhibitor of calpains. Mice were fed a fat-enriched diet and infused with AngII (1000 ng/kg per minute) for 4 weeks. Overexpression of calpastatin in BM-derived cells significantly attenuated AngII-induced atherosclerotic lesion formation in aortic arches, but had no effect on aneurysm formation. Using either BM-derived cells from calpain-1-deficient mice or mice with leukocyte-specific calpain-2 deficiency generated using cre-loxP recombination technology, further studies demonstrated that independent deficiency of either calpain-1 or -2 in leukocytes modestly attenuated AngII-induced atherosclerosis. Calpastatin overexpression significantly attenuated AngII-induced inflammatory responses in macrophages and spleen. Furthermore, calpain inhibition suppressed migration and adhesion of macrophages to endothelial cells in vitro. Calpain inhibition also significantly decreased hypercholesterolemia-induced atherosclerosis in the absence of AngII. CONCLUSIONS The present study demonstrates a pivotal role for BM-derived calpains in mediating AngII-induced atherosclerosis by influencing macrophage function.
Collapse
Affiliation(s)
- Deborah A Howatt
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Anju Balakrishnan
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Jessica J Moorleghen
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Latha Muniappan
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Debra L Rateri
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Haruhito A Uchida
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Jiro Takano
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Takaomi C Saido
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Athar H Chishti
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Laurent Baud
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Venkateswaran Subramanian
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.).
| |
Collapse
|
19
|
Srinivasan S, Schiemer J, Zhang X, Chishti AH, Le Breton GC. Gα13 Switch Region 2 Binds to the Talin Head Domain and Activates αIIbβ3 Integrin in Human Platelets. J Biol Chem 2015; 290:25129-39. [PMID: 26292217 PMCID: PMC4599016 DOI: 10.1074/jbc.m115.650978] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 08/10/2015] [Indexed: 11/06/2022] Open
Abstract
Even though GPCR signaling in human platelets is directly involved in hemostasis and thrombus formation, the sequence of events by which G protein activation leads to αIIbβ3 integrin activation (inside-out signaling) is not clearly defined. We previously demonstrated that a conformationally sensitive domain of one G protein, i.e. Gα13 switch region 1 (Gα13SR1), can directly participate in the platelet inside-out signaling process. Interestingly however, the dependence on Gα13SR1 signaling was limited to PAR1 receptors, and did not involve signaling through other important platelet GPCRs. Based on the limited scope of this involvement, and the known importance of G13 in hemostasis and thrombosis, the present study examined whether signaling through another switch region of G13, i.e. Gα13 switch region 2 (Gα13SR2) may represent a more global mechanism of platelet activation. Using multiple experimental approaches, our results demonstrate that Gα13SR2 forms a bi-molecular complex with the head domain of talin and thereby promotes β3 integrin activation. Moreover, additional studies provided evidence that Gα13SR2 is not constitutively associated with talin in unactivated platelets, but becomes bound to talin in response to elevated intraplatelet calcium levels. Collectively, these findings provide evidence for a novel paradigm of inside-out signaling in platelets, whereby β3 integrin activation involves the direct binding of the talin head domain to the switch region 2 sequence of the Gα13 subunit.
Collapse
Affiliation(s)
- Subhashini Srinivasan
- From the Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612 and
| | - James Schiemer
- Department of Developmental, Molecular, and Chemical Biology, Sackler School of Graduate Biomedical Sciences, Programs in Cellular and Molecular Physiology, Pharmacology, and Microbiology, Tufts University School of Medicine, Boston, Massachusetts 02111
| | - Xiaowei Zhang
- From the Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612 and
| | - Athar H Chishti
- Department of Developmental, Molecular, and Chemical Biology, Sackler School of Graduate Biomedical Sciences, Programs in Cellular and Molecular Physiology, Pharmacology, and Microbiology, Tufts University School of Medicine, Boston, Massachusetts 02111
| | - Guy C Le Breton
- From the Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612 and
| |
Collapse
|
20
|
Howatt DA, Balakrishnan A, Moorleghen JJ, Rateri DL, Uchida HA, Takano J, Saido TC, Chishti AH, Baud L, Subramanian V. Abstract 587: Leukocyte Calpain Deficiency Reduces Angiotensin II-induced Inflammation and Atherosclerosis in Hypercholesterolemic Mice. Arterioscler Thromb Vasc Biol 2015. [DOI: 10.1161/atvb.35.suppl_1.587] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background and Objective:
Chronic angiotensin II (AngII) infusion promotes atherosclerosis and abdominal aortic aneurysms (AAAs) in mice. Recently, we demonstrated that pharmacological inhibition of calpain-1 and -2 (a class of calcium-activated, neutral cysteine proteases) attenuated AngII-induced atherosclerosis, AAAs, and medial macrophage accumulation in mice. Using mice that overexpress calpastatin (CAST), the endogenous inhibitor of ubiquitous calpain-1 and -2 or mice with specific deficiency of calpain-1 or -2, the purpose of this study was to determine whether calpains in bone marrow (BM)-derived cells contribute to AngII-induced atherosclerosis and AAAs in hypercholesterolemic mice.
Methods and Results:
Irradiated male LDL receptor -/- mice were repopulated with BM-derived cells that were harvested from either wild type (WT) or CAST overexpression transgenic (Tg) mice. Four weeks after BM repopulation, recipient mice were fed a saturated fat-enriched diet and infused with either saline or AngII (1,000 ng/kg/min) for 4 weeks. AngII infusion increased systolic blood pressure equivalently in both genotypes. Ex vivo measurement of maximal diameter of abdominal aorta showed a comparable dilation in WT and Tg mice (1.28 ± 0.11 versus 1.32 ± 0.08 mm, P = NS). Interestingly, overexpression of CAST in BM-derived cells significantly attenuated AngII-induced atherosclerotic lesion formation in aortic arches by en face measurement (Intimal lesions: WT = 19.9 ± 1.8 % vs Tg = 9.9 ± 1.0 %; n=14, P<0.05). Using either BM cells-derived from calpain-1 deficient mice or mice with leukocyte-specific calpain-2 deficiency (Calpain-2f/f LysM Cre), further studies demonstrated that deficiency of either calpain-1 or -2 in leukocytes resulted in a modest, but significant, (P<0.05) decrease in AngII-induced atherosclerosis (Calpain-1: WT- 15 ± 1.2 % vs KO- 10 ± 0.96 %; Calpain-2f/f: LysM Cre WT-16 ± 1.4 % vs KO-11 ± 1.2 %). CAST overexpression significantly attenuated AngII-induced inflammatory responses in macrophages in vivo, and suppressed macrophage migration towards MCP-1 and adhesion to endothelial cells in vitro.
Conclusion:
Calpain inhibition in BM-derived cells attenuated AngII-induced atherosclerosis by influencing macrophage function.
Collapse
Affiliation(s)
| | | | | | | | - Haruhito A Uchida
- Chronic Kidney Disease and Cardiovascular Disease, Okayama Univ Graduate Sch of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Jiro Takano
- Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan
| | - Takaomi C Saido
- Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan
| | - Athar H Chishti
- Developmental, Molecular, and Chemical Biology, Tufts Univ Sch of Medicine, Boston, MA
| | - Laurent Baud
- Université Pierre et Marie Curie-Paris, INSERM, Paris, France
| | | |
Collapse
|
21
|
Baldwin M, Yamodo I, Ranjan R, Li X, Mines G, Marinkovic M, Hanada T, Oh SS, Chishti AH. Human erythrocyte band 3 functions as a receptor for the sialic acid-independent invasion of Plasmodium falciparum. Role of the RhopH3-MSP1 complex. Biochim Biophys Acta 2014; 1843:2855-70. [PMID: 25157665 DOI: 10.1016/j.bbamcr.2014.08.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 08/11/2014] [Accepted: 08/12/2014] [Indexed: 12/15/2022]
Abstract
Plasmodium falciparum takes advantage of two broadly defined alternate invasion pathways when infecting human erythrocytes: one that depends on and the other that is independent of host sialic acid residues on the erythrocyte surface. Within the sialic acid-dependent (SAD) and sialic acid-independent (SAID) invasion pathways, several alternate host receptors are used by P. falciparum based on its particular invasion phenotype. Earlier, we reported that two putative extracellular regions of human erythrocyte band 3 termed 5C and 6A function as host invasion receptor segments binding parasite proteins MSP1 and MSP9 via a SAID mechanism. In this study, we developed two mono-specific anti-peptide chicken IgY antibodies to demonstrate that the 5C and 6A regions of band 3 are exposed on the surface of human erythrocytes. These antibodies inhibited erythrocyte invasion by the P. falciparum 3D7 and 7G8 strains (SAID invasion phenotype), and the blocking effect was enhanced in sialic acid-depleted erythrocytes. In contrast, the IgY antibodies had only a marginal inhibitory effect on FCR3 and Dd2 strains (SAD invasion phenotype). A direct biochemical interaction between erythrocyte band 3 epitopes and parasite RhopH3, identified by the yeast two-hybrid screen, was established. RhopH3 formed a complex with MSP119 and the 5ABC region of band 3, and a recombinant segment of RhopH3 inhibited parasite invasion in human erythrocytes. Together, these findings provide evidence that erythrocyte band 3 functions as a major host invasion receptor in the SAID invasion pathway by assembling a multi-protein complex composed of parasite ligands RhopH3 and MSP1.
Collapse
Affiliation(s)
- Michael Baldwin
- Department of Developmental, Molecular & Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, USA; Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Boston, MA 02111, USA
| | - Innocent Yamodo
- St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston, MA 02135, USA
| | - Ravi Ranjan
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Xuerong Li
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - Gregory Mines
- Department of Developmental, Molecular & Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, USA; Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Boston, MA 02111, USA
| | - Marina Marinkovic
- Department of Developmental, Molecular & Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, USA; Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Boston, MA 02111, USA
| | - Toshihiko Hanada
- Department of Developmental, Molecular & Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, USA; Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Boston, MA 02111, USA
| | - Steven S Oh
- St. Elizabeth's Medical Center, Tufts University School of Medicine, Boston, MA 02135, USA
| | - Athar H Chishti
- Department of Developmental, Molecular & Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, USA; Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Boston, MA 02111, USA.
| |
Collapse
|
22
|
Baldwin M, Russo C, Li X, Chishti AH. Plasmodium falciparum signal peptide peptidase cleaves malaria heat shock protein 101 (HSP101). Implications for gametocytogenesis. Biochem Biophys Res Commun 2014; 450:1427-32. [PMID: 25017910 DOI: 10.1016/j.bbrc.2014.07.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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: 06/29/2014] [Accepted: 07/02/2014] [Indexed: 10/25/2022]
Abstract
Previously we described the identification of a Plasmodium falciparum signal peptide peptidase (PfSPP) functioning at the blood stage of malaria infection. Our studies also demonstrated that mammalian SPP inhibitors prevent malaria parasite growth at the late-ring/early trophozoite stage of intra-erythrocytic development. Consistent with its role in development, we tested the hypothesis that PfSPP functions at the endoplasmic reticulum of P.falciparum where it cleaves membrane-bound signal peptides generated following the enzyme activity of signal peptidase. The localization of PfSPP to the endoplasmic reticulum was confirmed by immunofluorescence microscopy and immunogold electron microscopy. Biochemical analysis indicated the existence of monomer and dimer forms of PfSPP in the parasite lysate. A comprehensive bioinformatics screen identified several candidate PfSPP substrates in the parasite genome. Using an established transfection based in vivo luminescence assay, malaria heat shock protein 101 (HSP101) was identified as a substrate of PfSPP, and partial inhibition of PfSPP correlated with the emergence of gametocytes. This finding unveils the first known substrate of PfSPP, and provides new perspectives for the function of intra-membrane proteolysis at the erythrocyte stage of malaria parasite life cycle.
Collapse
Affiliation(s)
- Michael Baldwin
- Department of Developmental, Molecular & Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, United States
| | - Crystal Russo
- Department of Developmental, Molecular & Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, United States
| | - Xuerong Li
- Department of Developmental, Molecular & Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, United States
| | - Athar H Chishti
- Department of Developmental, Molecular & Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, United States; Sackler School of Graduate Biomedical Sciences, Programs in Physiology, Pharmacology, and Microbiology, Tufts University School of Medicine, Boston, MA 02111, United States.
| |
Collapse
|
23
|
Wu Z, Chen X, Liu F, Chen W, Wu P, Wieschhaus AJ, Chishti AH, Roche PA, Chen WM, Lin TJ. Calpain-1 contributes to IgE-mediated mast cell activation. J Immunol 2014; 192:5130-9. [PMID: 24760147 DOI: 10.4049/jimmunol.1301677] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Mast cells play a central role in allergy through secretion of both preformed and newly synthesized mediators. Mast cell mediator secretion is controlled by a complex network of signaling events. Despite intensive studies, signaling pathways in the regulation of mast cell mediator secretion remain incompletely defined. In this study, we examined the role of calpain in IgE-dependent mast cell activation. IgE-mediated activation of mouse bone marrow-derived mast cells enhanced calpain activity. Inhibition of calpain activity by a number of calpain inhibitors reduced IgE-mediated mast cell degranulation both in vitro and in vivo. Calpain inhibitors blocked IgE-mediated TNF and IL-6 production in vitro and reduced late-phase allergic response in vivo. Importantly, mouse calpain-1 null bone marrow-derived mast cells showed reduced IgE-mediated mast cell degranulation in vitro and in vivo, diminished cytokine and chemokine production in vitro, and impaired late-phase allergic response in vivo. Further studies revealed that calpain-1 deficiency led to specific attenuation of IκB-NF-κB pathway and IKK-SNAP23 pathway, whereas calcium flux, MAPK, Akt, and NFAT pathway proceed normally in IgE-activated calpain-1 null mast cells. Thus, calpain-1 is identified as a novel regulator in IgE-mediated mast cell activation and could serve as a potential therapeutic target for the management of allergic inflammation.
Collapse
Affiliation(s)
- Zhengli Wu
- Department of Microbiology and Immunology, IWK Health Centre, Dalhousie University, Halifax, Nova Scotia B3K 6R8, Canada; Department of Pediatrics, IWK Health Centre, Dalhousie University, Halifax, Nova Scotia B3K 6R8, Canada
| | - Xiaochun Chen
- Department of Neurology, Affiliated Union Hospital of Fujian Medical University, Fuzhou, Fujian 350001, China
| | - Fang Liu
- Department of Microbiology and Immunology, IWK Health Centre, Dalhousie University, Halifax, Nova Scotia B3K 6R8, Canada; Department of Pediatrics, IWK Health Centre, Dalhousie University, Halifax, Nova Scotia B3K 6R8, Canada
| | - Wei Chen
- College of Veterinary Medicine, Jilin University, Changchun, Jilin 130062, China
| | - Ping Wu
- Department of Microbiology and Immunology, IWK Health Centre, Dalhousie University, Halifax, Nova Scotia B3K 6R8, Canada; Department of Pediatrics, IWK Health Centre, Dalhousie University, Halifax, Nova Scotia B3K 6R8, Canada
| | - Adam J Wieschhaus
- Department of Molecular Physiology and Pharmacology, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, MA 02111
| | - Athar H Chishti
- Department of Molecular Physiology and Pharmacology, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, Boston, MA 02111
| | - Paul A Roche
- Experimental Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892; and
| | - Wei-Min Chen
- Department of Hematology, Fujian Provincial Hospital, Fuzhou, Fujian 350000, China
| | - Tong-Jun Lin
- Department of Microbiology and Immunology, IWK Health Centre, Dalhousie University, Halifax, Nova Scotia B3K 6R8, Canada; Department of Pediatrics, IWK Health Centre, Dalhousie University, Halifax, Nova Scotia B3K 6R8, Canada;
| |
Collapse
|
24
|
Subramanian V, Moorleghen JJ, Balakrishnan A, Howatt DA, Chishti AH, Uchida HA. Calpain-2 compensation promotes angiotensin II-induced ascending and abdominal aortic aneurysms in calpain-1 deficient mice. PLoS One 2013; 8:e72214. [PMID: 23977256 PMCID: PMC3747148 DOI: 10.1371/journal.pone.0072214] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 02/08/2013] [Accepted: 07/09/2013] [Indexed: 02/01/2023] Open
Abstract
Background and Objective Recently, we demonstrated that angiotensin II (AngII)-infusion profoundly increased both aortic protein and activity of calpains, calcium-activated cysteine proteases, in mice. In addition, pharmacological inhibition of calpain attenuated AngII-induced abdominal aortic aneurysm (AA) in mice. Recent studies have shown that AngII infusion into mice leads to aneurysmal formation localized to the ascending aorta. However, the precise functional contribution of calpain isoforms (-1 or -2) in AngII-induced abdominal AA formation is not known. Similarly, a functional role of calpain in AngII-induced ascending AA remains to be defined. Using BDA-410, an inhibitor of calpains, and calpain-1 genetic deficient mice, we examined the relative contribution of calpain isoforms in AngII-induced ascending and abdominal AA development. Methodology/Results To investigate the relative contribution of calpain-1 and -2 in development of AngII-induced AAs, male LDLr −/− mice that were either calpain-1 +/+ or −/− were fed a saturated fat-enriched diet and infused with AngII (1,000 ng/kg/min) for 4 weeks. Calpain-1 deficiency had no significant effect on body weight or blood pressure during AngII infusion. Moreover, calpain-1 deficiency showed no discernible effects on AngII-induced ascending and abdominal AAs. Interestingly, AngII infusion induced increased expression of calpain-2 protein, thus compensating for total calpain activity in aortas of calpain-1 deficient mice. Oral administration of BDA-410, a calpain inhibitor, along with AngII-infusion significantly attenuated AngII-induced ascending and abdominal AA formation in both calpain-1 +/+ and −/− mice as compared to vehicle administered mice. Furthermore, BDA-410 administration attenuated AngII-induced aortic medial hypertrophy and macrophage accumulation. Western blot and immunostaining analyses revealed BDA-410 administration attenuated AngII-induced C-terminal fragmentation of filamin A, an actin binding cytoskeletal protein in aorta. Conclusion Calpain-2 compensates for loss of calpain-1, and both calpain isoforms are involved in AngII-induced aortic aneurysm formation in mice.
Collapse
Affiliation(s)
- Venkateswaran Subramanian
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, Kentucky, United States of America.
| | | | | | | | | | | |
Collapse
|
25
|
Mattheij NJA, Gilio K, van Kruchten R, Jobe SM, Wieschhaus AJ, Chishti AH, Collins P, Heemskerk JWM, Cosemans JMEM. Dual mechanism of integrin αIIbβ3 closure in procoagulant platelets. J Biol Chem 2013; 288:13325-36. [PMID: 23519467 PMCID: PMC3650371 DOI: 10.1074/jbc.m112.428359] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [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: 10/16/2012] [Revised: 03/20/2013] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Inactivation of integrin αIIbβ3 reverses platelet aggregate formation upon coagulation. RESULTS AND CONCLUSION Platelets from patient (Scott) and mouse (Capn1(-/-) and Ppif(-/-)) blood reveal a dual mechanism of αIIbβ3 inactivation: by calpain-2 cleavage of integrin-associated proteins and by cyclophilin D/TMEM16F-dependent phospholipid scrambling. SIGNIFICANCE These data provide novel insight into the switch mechanisms from aggregating to procoagulant platelets. Aggregation of platelets via activated integrin αIIbβ3 is a prerequisite for thrombus formation. Phosphatidylserine-exposing platelets with a key role in the coagulation process disconnect from a thrombus by integrin inactivation via an unknown mechanism. Here we show that αIIbβ3 inactivation in procoagulant platelets relies on a sustained high intracellular Ca(2+), stimulating intracellular cleavage of the β3 chain, talin, and Src kinase. Inhibition of calpain activity abolished protein cleavage, but only partly suppressed αIIbβ3 inactivation. Integrin αIIbβ3 inactivation was unchanged in platelets from Capn1(-/-) mice, suggesting a role of the calpain-2 isoform. Scott syndrome platelets, lacking the transmembrane protein TMEM16F and having low phosphatidylserine exposure, displayed reduced αIIbβ3 inactivation with the remaining activity fully dependent on calpain. In platelets from Ppif(-/-) mice, lacking mitochondrial permeability transition pore (mPTP) formation, agonist-induced phosphatidylserine exposure and αIIbβ3 inactivation were reduced. Treatment of human platelets with cyclosporin A gave a similar phenotype. Together, these data point to a dual mechanism of αIIbβ3 inactivation via calpain(-2) cleavage of integrin-associated proteins and via TMEM16F-dependent phospholipid scrambling with an assistant role of mPTP formation.
Collapse
Affiliation(s)
- Nadine J. A. Mattheij
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Karen Gilio
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Roger van Kruchten
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Shawn M. Jobe
- the Department of Pediatrics, Emory University, Atlanta, Georgia 30322
| | - Adam J. Wieschhaus
- the Department of Pharmacology, University of Illinois, Chicago, Illinois 60607
- the Department of Molecular Physiology and Pharmacology, Tufts University School of Medicine, Boston, Massachusetts 02111, and
| | - Athar H. Chishti
- the Department of Molecular Physiology and Pharmacology, Tufts University School of Medicine, Boston, Massachusetts 02111, and
| | - Peter Collins
- the Arthur Bloom Haemophilia Centre, Department of Haematology, Medical School of Cardiff University, Cardiff CF14 4YU, United Kingdom
| | - Johan W. M. Heemskerk
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6200 MD Maastricht, The Netherlands
| | - Judith M. E. M. Cosemans
- From the Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht University, 6200 MD Maastricht, The Netherlands
| |
Collapse
|
26
|
Subramanian V, Moorleghen JJ, Balakrishnan A, Howatt DA, Chishti AH, Uchida HA. Abstract 516: Calpain-2 Compensation Promotes Angiotensin II-induced Ascending and Abdominal Aortic Aneurysms in Calpain-1 Deficient Mice. Arterioscler Thromb Vasc Biol 2013. [DOI: 10.1161/atvb.33.suppl_1.a516] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background and Objective
We demonstrated that angiotensin II (AngII)-infusion profoundly increased both aortic protein and activity of calpains, calcium-activated cysteine proteases, in mice. In addition, pharmacological inhibition of calpain attenuated AngII-induced abdominal aortic aneurysm (AA) in mice. Recent studies have shown that AngII infusion into mice leads to aneurysmal formation localized to the ascending aorta. However, the precise functional contribution of calpain isoforms (-1 or -2) in AngII-induced abdominal AA formation is not known. Similarly, a functional role of calpain in AngII-induced ascending AA remains to be defined. Using BDA-410, an inhibitor of calpains, and calpain-1 genetic deficient mice, we examined the relative contribution of calpain isoforms in AngII-induced ascending and abdominal AA development.
Methods and Results
Male LDLr-/- mice that were either calpain-1 +/+ or -/- were fed a saturated fat-enriched diet and infused with AngII (1,000 ng/kg/min) for 4 weeks. Calpain-1 deficiency had no effect on body weight or blood pressure during AngII infusion. Intimal areas of ascending aorta and maximum external width of the suprarenal abdominal aorta were measured by en face. Calpain-1 deficiency showed no discernible effects on AngII-induced ascending and abdominal AA development (P = NS). Interestingly, AngII infusion induced increased expression of calpain-2 protein, thus compensating for total calpain activity in aortas of calpain-1 deficient mice. Oral administration of BDA-410 along with AngII infusion significantly attenuated AngII-induced ascending (Vehicle - +/+: 15.0 ± 1.0, -/-: 14.9 ± 0.8; BDA: +/+: 11.5 ± 0.6, -/-: 12.1 ± 0.6 mm
2
; P<0.05) and abdominal (Vehicle - +/+: 1.7 ± 0.1, -/-: 1.6 ± 0.1; BDA: +/+: 1.0 ± 0.1, -/-: 1.1 ± 0.1 mm; P<0.05) AA formation in both calpain-1 +/+ and -/- mice as compared to vehicle administered mice. Western blot and immunostaining analyses revealed BDA-410 administration attenuated AngII-induced C-terminal fragmentation of filamin A (P<0.05), an actin binding cytoskeletal protein, and medial macrophage accumulation in aorta.
Conclusion
Calpain-2 compensates for loss of calpain-1, and promotes AngII-induced ascending and abdominal AAs in calpain-1 deficient mice.
Collapse
Affiliation(s)
| | | | | | | | - Athar H Chishti
- Dept of Molecular Physiology and Pharmacology, Tufts Univ Sch of Medicine, Boston, MA
| | - Haruhito A Uchida
- Dept of Medicine and Clinical Sciences,, Okayama Univ, Okayama, Japan
| |
Collapse
|
27
|
Abstract
Dematin is a broadly expressed membrane cytoskeletal protein that has been well characterized in erythrocytes and to a lesser extent in non-erythroid cells. However, dematin's function in platelets is not known. Here, we show that dematin is abundantly expressed in both human and mouse platelets. Platelets harvested from the dematin headpiece knock-out (HPKO) mouse model exhibit a striking defect in the mobilization of calcium in response to multiple agonists of platelet activation. The reduced calcium mobilization in HPKO platelets is associated with concomitant inhibition of platelet aggregation and granule secretion. Integrin α(IIb)β(3) activation in response to agonists is attenuated in the HPKO platelets. The mutant platelets show nearly normal spreading on fibrinogen and an unaltered basal cAMP level; however, the clot retraction was compromised in the mutant mice. Immunofluorescence analysis indicated that dematin is present both at the dense tubular system and plasma membrane fractions of platelets. Proteomic analysis of dematin-associated proteins in human platelets identified inositol 1,4,5-trisphosphate 3-kinase isoform B (IP3KB) as a binding partner, which was confirmed by immunoprecipitation analysis. IP3KB, a dense tubular system protein, is a major regulator of calcium homeostasis. Loss of the dematin headpiece resulted in a decrease of IP3KB at the membrane and increased levels of IP3KB in the cytosol. Collectively, these findings unveil dematin as a novel regulator of internal calcium mobilization in platelets affecting multiple signaling and cytoskeletal functions. Implications of a conserved role of dematin in the regulation of calcium homeostasis in other cell types will be discussed.
Collapse
Affiliation(s)
- Adam J Wieschhaus
- Department of Molecular Physiology and Pharmacology, Tufts University School of Medicine, Boston, Massachusetts 02111, USA
| | | | | |
Collapse
|
28
|
De Franceschi L, Franco RS, Bertoldi M, Brugnara C, Matté A, Siciliano A, Wieschhaus AJ, Chishti AH, Joiner CH. Pharmacological inhibition of calpain-1 prevents red cell dehydration and reduces Gardos channel activity in a mouse model of sickle cell disease. FASEB J 2012; 27:750-9. [PMID: 23085996 DOI: 10.1096/fj.12-217836] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Sickle cell disease (SCD) is a globally distributed hereditary red blood cell (RBC) disorder. One of the hallmarks of SCD is the presence of circulating dense RBCs, which are important in SCD-related clinical manifestations. In human dense sickle cells, we found reduced calpastatin activity and protein expression compared to either healthy RBCs or unfractionated sickle cells, suggesting an imbalance between activator and inhibitor of calpain-1 in favor of activator in dense sickle cells. Calpain-1 is a nonlysosomal cysteine proteinase that modulates multiple cell functions through the selective cleavage of proteins. To investigate the relevance of this observation in vivo, we evaluated the effects of the orally active inhibitor of calpain-1, BDA-410 (30 mg/kg/d), on RBCs from SAD mice, a mouse model for SCD. In SAD mice, BDA-410 improved RBC morphology, reduced RBC density (D(20); from 1106 ± 0.001 to 1100 ± 0.001 g/ml; P<0.05) and increased RBC-K(+) content (from 364 ± 10 to 429 ± 12.3 mmol/kg Hb; P<0.05), markedly reduced the activity of the Ca(2+)-activated K(+)channel (Gardos channel), and decreased membrane association of peroxiredoxin-2. The inhibitory effect of calphostin C, a specific inhibitor of protein kinase C (PKC), on the Gardos channel was eliminated after BDA-410 treatment, which suggests that calpain-1 inhibition affects the PKC-dependent fraction of the Gardos channel. BDA-410 prevented hypoxia-induced RBC dehydration and K(+) loss in SAD mice. These data suggest a potential role of BDA-410 as a novel therapeutic agent for treatment of SCD.
Collapse
|
29
|
Abstract
BACKGROUND Calpains are implicated in a wide range of cellular functions including the maintenance of hemostasis via the regulation of cytoskeletal modifications in platelets. OBJECTIVES Determine the functional role of calpain isoforms in platelet spreading. METHODS AND RESULTS Platelets from calpain-1(-/-) mice show enhanced spreading on collagen- and fibrinogen-coated surfaces as revealed by immunofluorescence, differential interference contrast (DIC) and scanning electron microscopy. The treatment of mouse platelets with MDL, a cell permeable inhibitor of calpains 1/2, resulted in increased spreading. The PTP1B-mediated enhanced tyrosine dephosphorylation in calpain-1(-/-) platelets did not fully account for the enhanced spreading as platelets from the double knockout mice lacking calpain-1 and PTP1B showed only a partial rescue of the spreading phenotype. In non-adherent platelets, proteolysis and GTPase activity of RhoA and Rac1 were indistinguishable between the wild-type (WT) and calpain-1(-/-) platelets. In contrast, the ECM-adherent calpain-1(-/-) platelets showed higher Rac1 activity at the beginning of spreading, whereas RhoA was more active at later time points. The ECM-adherent calpain-1(-/-) platelets showed an elevated level of RhoA protein but not Rac1 and Cdc42. Proteolysis of recombinant RhoA, but not Rac1 and Cdc42, indicates that RhoA is a calpain-1 substrate in vitro. CONCLUSIONS Potentiation of the platelet spreading phenotype in calpain-1(-/-) mice suggests a novel role of calpain-1 in hemostasis, and may explain the normal bleeding time observed in the calpain-1(-/-) mice.
Collapse
Affiliation(s)
- S M Kuchay
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL, USA
| | | | | | | | | |
Collapse
|
30
|
Yamada KH, Kozlowski DA, Seidl SE, Lance S, Wieschhaus AJ, Sundivakkam P, Tiruppathi C, Chishti I, Herman IM, Kuchay SM, Chishti AH. Targeted gene inactivation of calpain-1 suppresses cortical degeneration due to traumatic brain injury and neuronal apoptosis induced by oxidative stress. J Biol Chem 2012; 287:13182-93. [PMID: 22367208 PMCID: PMC3339949 DOI: 10.1074/jbc.m111.302612] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 02/22/2012] [Indexed: 01/30/2023] Open
Abstract
Calpains are calcium-regulated cysteine proteases that have been implicated in the regulation of cell death pathways. Here, we used our calpain-1 null mouse model to evaluate the function of calpain-1 in neural degeneration following a rodent model of traumatic brain injury. In vivo, calpain-1 null mice show significantly less neural degeneration and apoptosis and a smaller contusion 3 days post-injury than wild type littermates. Protection from traumatic brain injury corroborated with the resistance of calpain-1 neurons to apoptosis induced by oxidative stress. Biochemical analysis revealed that caspase-3 activation, extracellular calcium entry, mitochondrial membrane permeability, and release of apoptosis-inducing factor from mitochondria are partially blocked in the calpain-1 null neurons. These findings suggest that the calpain-1 knock-out mice may serve as a useful model system for neuronal protection and apoptosis in traumatic brain injury and other neurodegenerative disorders in which oxidative stress plays a role.
Collapse
Affiliation(s)
- Kaori H. Yamada
- From the Department of Molecular Physiology and Pharmacology, Tufts University School of Medicine, Boston, Massachusetts 02111
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, Illinois 60612, and
| | - Dorothy A. Kozlowski
- the Department of Biological Sciences, DePaul University, Chicago, Illinois 60614
| | - Stacey E. Seidl
- the Department of Biological Sciences, DePaul University, Chicago, Illinois 60614
| | - Steven Lance
- the Department of Biological Sciences, DePaul University, Chicago, Illinois 60614
| | - Adam J. Wieschhaus
- From the Department of Molecular Physiology and Pharmacology, Tufts University School of Medicine, Boston, Massachusetts 02111
- the Sackler School Programs in Physiology, Pharmacology, and Microbiology
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, Illinois 60612, and
| | - Premanand Sundivakkam
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, Illinois 60612, and
| | - Chinnaswamy Tiruppathi
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, Illinois 60612, and
| | - Imran Chishti
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, Illinois 60612, and
| | - Ira M. Herman
- From the Department of Molecular Physiology and Pharmacology, Tufts University School of Medicine, Boston, Massachusetts 02111
| | - Shafi M. Kuchay
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, Illinois 60612, and
| | - Athar H. Chishti
- From the Department of Molecular Physiology and Pharmacology, Tufts University School of Medicine, Boston, Massachusetts 02111
- the Sackler School Programs in Physiology, Pharmacology, and Microbiology
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, Illinois 60612, and
| |
Collapse
|
31
|
Lorand L, Murthy SNP, Khan AA, Xue W, Lockridge O, Chishti AH. Transglutaminase-mediated remodeling of the human erythrocyte membrane skeleton: relevance for erythrocyte diseases with shortened cell lifespan. ACTA ACUST UNITED AC 2012; 78:385-414. [PMID: 22220479 DOI: 10.1002/9781118105771.ch9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- Laszlo Lorand
- Department of Cell and Molecular Biology, Feinberg Medical School Northwestern University, Chicago, IL, USA
| | | | | | | | | | | |
Collapse
|
32
|
Liu F, Khan AA, Chishti AH, Ostafin AE. Atomic force microscopy demonstration of cytoskeleton instability in mouse erythrocytes with dematin-headpiece and β-adducin deficiency. Scanning 2011; 33:426-436. [PMID: 21638291 PMCID: PMC3955161 DOI: 10.1002/sca.20246] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Accepted: 05/06/2011] [Indexed: 05/30/2023]
Abstract
The pattern of disassembly of the cytoskeletal network of murine erythrocytes with deficiency of either dematin-headpiece or β-adducin or both proteins were investigated using atomic force microscopy. A heterogeneous complex structure with fine filament features and coarse features was observed in the cytoskeleton of wild type mouse erythrocytes, whereas a significant amount of rearrangement and aggregation occurred in the mutants, particularly in the cells carrying double gene mutations. These results are consistent with the cellular and biochemical phenotype of the mutant cell membranes as being more fragile due to weakened vertical connections with the plasma membrane.
Collapse
Affiliation(s)
- Fei Liu
- Molecular and Integrative Physiological Sciences, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115-6021
| | - Anwar A. Khan
- Department of Medicine, Section of Hematology/Oncology, University of Illinois College of Medicine, Chicago, IL, 60612
| | - Athar H. Chishti
- Department of Molecular Physiology and Pharmacology, Tufts University School of Medicine, Boston MA 02111
| | - Agnes E. Ostafin
- Department of Materials Science and Engineering and Bioengineering, University of Utah, Salt Lake City, UT 84112
| |
Collapse
|
33
|
Huckaba TM, Gennerich A, Wilhelm JE, Chishti AH, Vale RD. Kinesin-73 is a processive motor that localizes to Rab5-containing organelles. J Biol Chem 2011; 286:7457-67. [PMID: 21169635 PMCID: PMC3045001 DOI: 10.1074/jbc.m110.167023] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 12/14/2010] [Indexed: 01/21/2023] Open
Abstract
Drosophila Kinesin-73 (Khc-73), which plays a role in mitotic spindle polarity in neuroblasts, is a metazoan-specific member of the Kinesin-3 family of motors, which includes mammalian KIF1A and Caenorhabditis elegans Unc-104. The mechanism of Kinesin-3 motors has been controversial because some studies have reported that they transport cargo as monomers whereas other studies have suggested a dimer mechanism. Here, we have performed single-molecule motility and cell biological studies of Khc-73. We find that constructs containing the motor and the conserved short stretches of putative coiled-coil-forming regions are predominantly monomeric in vitro, but that dimerization allows for fast, processive movement and high force production (7 piconewtons). In Drosophila cell lines, we present evidence that Khc-73 can dimerize in vivo. We also show that Khc-73 is recruited specifically to Rab5-containing endosomes through its "tail" domain. Our results suggest that the N-terminal half of Khc-73 can undergo a monomer-dimer transition to produce a fast processive motor and that its C-terminal half possesses a specific Rab5-vesicle binding domain.
Collapse
Affiliation(s)
- Thomas M. Huckaba
- From the Department of Cellular and Molecular Pharmacology, University of California, San Francisco, California 94158-2517
| | - Arne Gennerich
- the Department of Anatomy and Structural Biology and Gruss-Lipper Biophotonics Center, Albert Einstein College of Medicine, Bronx, New York 10461
| | - James E. Wilhelm
- the Section of Cell and Developmental Biology, Division of Biological Sciences, University of California, San Diego, La Jolla, California 92093
| | - Athar H. Chishti
- the Department of Physiology, Tufts University School of Medicine, Boston, Massachusetts 02111, and
| | - Ronald D. Vale
- From the Department of Cellular and Molecular Pharmacology, University of California, San Francisco, California 94158-2517
- the Howard Hughes Medical Institute, University of California, San Francisco, California 94158-2517
| |
Collapse
|
34
|
Kang MY, Zhang Y, Matkovich SJ, Diwan A, Chishti AH, Dorn GW. Receptor-independent cardiac protein kinase Calpha activation by calpain-mediated truncation of regulatory domains. Circ Res 2010; 107:903-12. [PMID: 20689063 DOI: 10.1161/circresaha.110.220772] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
RATIONALE Protein kinase (PK)Cs and calpain cysteine proteases are highly expressed in myocardium. Ischemia produces calcium overload that activates calpains and conventional PKCs. However, calpains can proteolytically process PKCs, and the potential in vivo consequences of this interaction are unknown. OBJECTIVE To determine the biochemical and pathophysiological consequences of calpain-mediated cardiac PKCα proteolysis. METHODS AND RESULTS Isolated mouse hearts subjected to global ischemia/reperfusion demonstrated cleavage of PKCα. Calpain 1 overexpression was not sufficient to produce PKCα cleavage in normal hearts, but ischemia-induced myocardial PKCα cleavage and myocardial injury were greatly increased by cardiac-specific expression of calpain 1. In contrast, calpain 1 gene ablation or inhibition with calpastatin prevented ischemia/reperfusion induced PKCα cleavage; infarct size was decreased and ventricular function enhanced in infarcted calpain 1 knockout hearts. To determine consequences of PKCα fragmentation on myocardial protein phosphorylation, transgenic mice were created conditionally expressing full-length PKCα or its N-terminal and C-terminal calpain 1 cleavage fragments. Two-dimensional mapping of ventricular protein extracts showed a distinct PKCα phosphorylation profile that was exaggerated and distorted in hearts expressing the PKCα C-terminal fragment. MALDI mass spectroscopy revealed hyperphosphorylation of myosin-binding protein C and phosphorylation of atypical substrates by the PKCα C-terminal fragment. Expression of parent PKCα produced a mild cardiomyopathy, whereas myocardial expression of the C-terminal PKCα fragment induced a disproportionately severe, rapidly lethal cardiomyopathy. CONCLUSIONS Proteolytic processing of PKCα by calcium-activated calpain activates pathological cardiac signaling through generation of an unregulated and/or mistargeted kinase. Production of the PKCα C-terminal fragment in ischemic hearts occurs via a receptor-independent mechanism.
Collapse
Affiliation(s)
- Min-Young Kang
- Washington University Center for Pharmacogenomics, St Louis, MO 63110, USA
| | | | | | | | | | | |
Collapse
|
35
|
Chen L, Jiang ZG, Khan AA, Chishti AH, McKnight CJ. Dematin exhibits a natively unfolded core domain and an independently folded headpiece domain. Protein Sci 2009; 18:629-36. [PMID: 19241372 DOI: 10.1002/pro.59] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Dematin is an actin-binding protein originally identified in the junctional complex of the erythrocyte plasma membrane, and is present in many nonerythroid cells. Dematin headpiece knockout mice display a spherical red cell phenotype and develop a compensated anemia. Dematin has two domains: a 315-residue, proline-rich "core" domain and a 68-residue carboxyl-terminal villin-type "headpiece" domain. Expression of full-length dematin in E. coli as a GST recombinant protein results in truncation within a proline, glutamic acid, serine, threonine rich region (PEST). Therefore, we designed a mutant construct that replaces the PEST sequence. The modified dematin has high actin binding activity as determined by actin sedimentation assays. Negative stain electron microscopy demonstrates that the modified dematin also exhibits actin bundling activity like that of native dematin. Circular dichroism (CD) and NMR spectral analysis, however, show little secondary structure in the modified dematin. The lack of secondary structure is also observed in native dematin purified from human red blood cells. (15)N-HSQC NMR spectra of modified dematin indicate that the headpiece domain is fully folded whereas the core region is primarily unfolded. Our finding suggests that the core is natively unfolded and may serve as a scaffold to organize the components of the junctional complex.
Collapse
Affiliation(s)
- Lin Chen
- Department of Physiology and Biophysics, Boston University School of Medicine, Boston, Massachusetts 02118, USA
| | | | | | | | | |
Collapse
|
36
|
Mays TA, Sanford JL, Hanada T, Chishti AH, Rafael-Fortney JA. Glutamate receptors localize postsynaptically at neuromuscular junctions in mice. Muscle Nerve 2009; 39:343-9. [PMID: 19208409 DOI: 10.1002/mus.21099] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Dlg (Discs Large) is a multidomain protein that interacts with glutamate receptors and potassium channels at Drosophila neuromuscular junctions (NMJs) and at mammalian central nervous system synapses. Dlg also localizes postsynaptically at cholinergic mammalian NMJs. We show here that alpha-amino-3-hydroxy-5-methylisoxazole-4-proprionate (AMPA) receptor subunits, together with glutamate, are present at the mammalian NMJ. Both AMPA and NMDA (N-methyl-D-aspartate) glutamate receptor subunits display overlapping postsynaptic localization patterns with Dlg at all NMJs examined in normal mice. Kir2 potassium channels also localize with Dlg and glutamate receptors at this synapse. Localization of the components of a glutamatergic system suggests novel mechanisms at mammalian neuromuscular synapses.
Collapse
Affiliation(s)
- Tessily A Mays
- Department of Molecular and Cellular Biochemistry, 410 Hamilton Hall, College of Medicine, Ohio State University, 1645 Neil Avenue, Columbus, Ohio 43210, USA
| | | | | | | | | |
Collapse
|
37
|
Abstract
Cell motility, adhesion and actin cytoskeletal rearrangements occur upon integrin-engagement to the extracellular matrix and activation of the small family of Rho GTPases, RhoA, Rac1 and Cdc42. The activity of the GTPases is regulated through associations with guanine nucleotide exchange factors (GEFs), GTPase activating proteins (GAPs) and guanine dissociation inhibitors (GDIs). Recent studies have demonstrated a critical role for actin-binding proteins, such as ezrin, radixin and moesin (ERM), in modulating the activity of small GTPases through their direct associations with GEFs, GAPs and GDI's. Dematin, an actin binding and bundling phospho-protein was first identified and characterized from the erythrocyte membrane, and has recently been implicated in regulating cell motility, adhesion and morphology by suppressing RhoA activation in mouse embryonic fibroblasts. Although the precise mechanism of RhoA suppression by dematin is unclear, several plausible and hypothetical models can be invoked. Dematin may bind and inhibit GEF activity, form an inactive complex with GDI-RhoA-GDP, or enhance GAP function. Dematin is the first actin-binding protein identified from the erythrocyte membrane that participates in GTPase signaling, and its broad expression suggests a conserved function in multiple tissues.
Collapse
Affiliation(s)
- Morvarid Mohseni
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, USA.
| | | |
Collapse
|
38
|
Li X, Chen H, Bahamontes-Rosa N, Kun JFJ, Traore B, Crompton PD, Chishti AH. Plasmodium falciparum signal peptide peptidase is a promising drug target against blood stage malaria. Biochem Biophys Res Commun 2009; 380:454-9. [PMID: 19174148 DOI: 10.1016/j.bbrc.2009.01.083] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2009] [Accepted: 01/15/2009] [Indexed: 11/29/2022]
Abstract
The resistance of malaria parasites to current anti-malarial drugs is an issue of major concern globally. Recently we identified a Plasmodium falciparum cell membrane aspartyl protease, which binds to erythrocyte band 3, and is involved in merozoite invasion. Here we report the complete primary structure of P. falciparum signal peptide peptidase (PfSPP), and demonstrate that it is essential for parasite invasion and growth in human erythrocytes. Gene silencing suggests that PfSPP may be essential for parasite survival in human erythrocytes. Remarkably, mammalian signal peptide peptidase inhibitors (Z-LL)(2)-ketone and L-685,458 effectively inhibited malaria parasite invasion as well as growth in human erythrocytes. In contrast, DAPT, an inhibitor of a related gamma-secretase/presenilin-1, was ineffective. Thus, SPP inhibitors specific for PfSPP may function as potent anti-malarial drugs against the blood stage malaria.
Collapse
Affiliation(s)
- Xuerong Li
- Department of Pharmacology, University of Illinois College of Medicine, 909 South Wolcott Avenue, UIC Cancer Center, MC-704 Room 5100, Chicago, IL 60612, USA
| | | | | | | | | | | | | |
Collapse
|
39
|
Seo PS, Quinn BJ, Khan AA, Zeng L, Takoudis CG, Hanada T, Bolis A, Bolino A, Chishti AH. Identification of erythrocyte p55/MPP1 as a binding partner of NF2 tumor suppressor protein/Merlin. Exp Biol Med (Maywood) 2009; 234:255-62. [PMID: 19144871 DOI: 10.3181/0809-rm-275] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [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] [Indexed: 12/13/2022] Open
Abstract
Neurofibromatosis type 2 is an inherited disorder characterized by the development of benign and malignant tumors on the auditory nerves and central nervous system with symptoms including hearing loss, poor balance, skin lesions, and cataracts. Here, we report a novel protein-protein interaction between NF2 protein (merlin or schwannomin) and erythrocyte p55, also designated as MPP1. The p55 is a conserved scaffolding protein with postulated functions in cell shape, hair cell development, and neural patterning of the retina. The FERM domain of NF2 protein binds directly to p55, and surface plasmon resonance analysis indicates a specific interaction with a kD value of 3.7 nM. We developed a specific monoclonal antibody against human erythrocyte p55, and found that both p55 and NF2 proteins are colocalized in the non-myelin-forming Schwann cells. This finding suggests that the p55-NF2 protein interaction may play a functional role in the regulation of apico-basal polarity and tumor suppression pathways in non-erythroid cells.
Collapse
Affiliation(s)
- Pil-Soo Seo
- UIC Cancer Center, COMRB, Room 5099, 909 South Wolcott Avenue, Chicago, IL 60612-3725, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Seo PS, Jeong JJ, Zeng L, Takoudis CG, Quinn BJ, Khan AA, Hanada T, Chishti AH. Alternatively spliced exon 5 of the FERM domain of protein 4.1R encodes a novel binding site for erythrocyte p55 and is critical for membrane targeting in epithelial cells. Biochim Biophys Acta 2008; 1793:281-9. [PMID: 18952129 DOI: 10.1016/j.bbamcr.2008.09.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2008] [Revised: 09/12/2008] [Accepted: 09/17/2008] [Indexed: 01/18/2023]
Abstract
Direct physical linkage of MAGUKs to the actin cytoskeleton was first established by the interaction of erythrocyte p55 with the FERM domain of protein 4.1R. Subsequently, it was reported that p55 binds to a 51-amino acid peptide, encoded by exon 10, located within the FERM domain of protein 4.1R. In this study, we investigated the nature of the p55-FERM domain binding interface and show that p55 binds to a second 35-amino acid peptide, encoded by an alternatively spliced exon 5, located within the FERM domain of protein 4.1R. Competition and Surface Plasmon Resonance-binding measurements suggest that the peptides encoded by exons 5 and 10 bind to independent sites within the D5 domain of p55. Interestingly, the full length 135 kDa isoform of protein 4.1R containing both exons 5 and 10 was targeted exclusively to the plasma membrane of epithelial cells whereas the same isoform without exon 5 completely lost its membrane localization capacity. Together, these results indicate that p55 binds to two distinct sites within the FERM domain, and the alternatively spliced exon 5 is necessary for the membrane targeting of protein 4.1R in epithelial cells. Since sequences similar to the exon 5-peptide of protein 4.1R and D5 domain of p55 are conserved in many proteins, our findings suggest that a similar mechanism may govern the membrane targeting of other FERM domain containing proteins.
Collapse
Affiliation(s)
- Pil-Soo Seo
- Department of Pharmacology, UIC Cancer Center, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Li X, Chen H, Khan AA, Lauterbach SB, Lanzillotti R, Rai PR, Kane RS, Coetzer TL, Chishti AH. Receptor-based identification of an inhibitory peptide against blood stage malaria. Biochem Biophys Res Commun 2008; 376:489-93. [PMID: 18793615 DOI: 10.1016/j.bbrc.2008.09.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Accepted: 09/03/2008] [Indexed: 11/28/2022]
Abstract
Plasmodium falciparum uses multiple host receptors to attach and invade human erythrocytes. Glycophorins have been implicated as receptors for parasite invasion in human erythrocytes. Here, we screened a phage display cDNA library of P. falciparum (FCR3, a sialic acid-dependent strain) using purified glycophorins and erythrocytes as bait. Several phage clones were identified that bound to immobilized glycophorins and contained the same 74 bp insert encoding the 7-amino acids sequence ETTLKSF. A similar screen using intact human erythrocytes in solution identified additional phage clones containing the same 7-amino acids sequence. Using ELISA and immunofluorescence, direct binding of ETTLKSF peptide to glycophorins and erythrocytes was confirmed. Pull-down and protease treatment assays suggest that ETTLKSF peptide specifically interacts with glycophorin C. The synthetic ETTLKSF peptide partially blocks merozoite invasion in human erythrocytes. Further characterization of ETTLKSF peptide could lead to the development of a novel class of inhibitors against the blood stage malaria.
Collapse
Affiliation(s)
- Xuerong Li
- Department of Pharmacology and Cancer Center, University of Illinois College of Medicine, 909 South Wolcott Avenue, Room 5100, MC 704, Chicago, IL 60612, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Mohseni M, Chishti AH. Erythrocyte dematin is a candidate gene for Marie Unna hereditary hypotrichosis and related hairloss disorders. Am J Hematol 2008; 83:430-2. [PMID: 18273904 DOI: 10.1002/ajh.21153] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
43
|
Khan AA, Hanada T, Mohseni M, Jeong JJ, Zeng L, Gaetani M, Li D, Reed BC, Speicher DW, Chishti AH. Dematin and adducin provide a novel link between the spectrin cytoskeleton and human erythrocyte membrane by directly interacting with glucose transporter-1. J Biol Chem 2008; 283:14600-9. [PMID: 18347014 DOI: 10.1074/jbc.m707818200] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Dematin and adducin are actin-binding proteins located at the spectrin-actin junctions, also called the junctional complex, in the erythrocyte membrane. Here we propose a new model whereby dematin and adducin link the junctional complex to human erythrocyte plasma membrane. Using a combination of surface labeling, immunoprecipitation, and vesicle proteomics approaches, we have identified glucose transporter-1 as the receptor for dematin and adducin in the human erythrocyte membrane. This finding is the first description of a transmembrane protein that binds to dematin and adducin, thus providing a rationale for the attachment of the junctional complex to the lipid bilayer. Because homologues of dematin, adducin, and glucose transporter-1 exist in many non-erythroid cells, we propose that a conserved mechanism may exist that couples sugar and other related transporters to the actin cytoskeleton.
Collapse
Affiliation(s)
- Anwar A Khan
- Department of Pharmacology, University of Illinois Cancer Center, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Sha D, Jin Y, Wu H, Wei J, Lin CH, Lee YH, Buddhala C, Kuchay S, Chishti AH, Wu JY. Role of mu-calpain in proteolytic cleavage of brain L-glutamic acid decarboxylase. Brain Res 2008; 1207:9-18. [PMID: 18377878 DOI: 10.1016/j.brainres.2008.02.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2007] [Revised: 01/29/2008] [Accepted: 02/01/2008] [Indexed: 11/15/2022]
Abstract
Glutamic acid decarboxylase (GAD) is the rate-limiting enzyme for gamma-aminobutyric acid (GABA) biosynthesis. Previously, we reported the presence of truncated forms of GAD in vivo and in vitro. In addition, an unidentified endogenous protease responsible for proteolytic cleavage of full-length GAD (fGAD) to its truncated form (tGAD) was also observed. In this communication, we report that mu-calpain is a good candidate for conversion of fGAD(67) to tGAD(67). This conclusion is based on the following observations: 1. purified recombinant GAD(67) is cleaved by mu-calpain at specific sites; 2. in brain synaptosomal preparation, GAD(67) is cleaved to its truncated form by an endogenous protease which is inhibited by specific calpain inhibitors; 3. in mu-calpain knockout mice, the level of tGAD in the brain is greatly reduced compared with the wild type; 4. when mu-calpain gene is silenced by siRNA, the level of tGAD is also markedly reduced compared to the control group; and 5. mu-calpain is activated by neuronal stimulation and Ca(2+)-influx. The physiological significance of calpain in regulation of GABA synthesis and GABAergic neurotransmission is also discussed.
Collapse
Affiliation(s)
- Di Sha
- Department of Biomedical Sciences, Florida Atlantic University, Boca Raton, FL 33431, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Li X, Chen H, Oh SS, Chishti AH. A Presenilin-like protease associated with Plasmodium falciparum micronemes is involved in erythrocyte invasion. Mol Biochem Parasitol 2007; 158:22-31. [PMID: 18160114 DOI: 10.1016/j.molbiopara.2007.11.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2007] [Revised: 11/07/2007] [Accepted: 11/08/2007] [Indexed: 10/24/2022]
Abstract
We describe identification of a Plasmodium falciparum microneme protease involved in RBC invasion. From the yeast two-hybrid screening of a P. falciparum cDNA library, we have identified a 47 kDa membrane protein that interacted with the 5ABC domain of human RBC band 3. This protein shared homology with a Presenilin-type aspartyl protease, the signal peptide peptidase (SPP). An antibody raised against a predicted exposed region of this protein reacted specifically to a single band of approximately 47 kDa in the P. falciparum protein extract. Immunofluorescence microscopy suggested that this protein co-localized with the microneme protein EBA-175 in schizonts, and immunoelectron microscopy established that it is primarily localized to micronemes in merozoites. Functional characterization of Plasmodium falciparum signal peptide peptidase (PfSPP), demonstrates that an antibody to PfSPP blocks RBC invasion by P. falciparumin vitro. Native and recombinant PfSPP bound directly to the 5ABC domain of band 3 in solution and the binding of PfSPP to RBCs was chymotrypsin-sensitive, but trypsin and neuraminidase-resistant. Together, these results suggest that host band 3 interacts with PfSPP during RBC invasion presumably following parasite microneme discharge. PfSPP is the first microneme-associated intramembrane aspartyl protease identified in the apicomplexan parasites that interacts with a major transmembrane receptor on host erythrocytes.
Collapse
Affiliation(s)
- Xuerong Li
- Department of Pharmacology and Cancer Center, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | | | | | | |
Collapse
|
46
|
Yamada KH, Hanada T, Chishti AH. The effector domain of human Dlg tumor suppressor acts as a switch that relieves autoinhibition of kinesin-3 motor GAKIN/KIF13B. Biochemistry 2007; 46:10039-45. [PMID: 17696365 PMCID: PMC2525504 DOI: 10.1021/bi701169w] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [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] [Indexed: 11/28/2022]
Abstract
The activity of motor proteins must be tightly regulated in the cells to prevent unnecessary energy consumption and to maintain proper distribution of cellular components. Loading of the cargo molecule is one likely mechanism to activate an inactive motor. Here, we report that the activity of the kinesin-3 motor protein, GAKIN, is regulated by the direct binding of its protein cargo, human discs large (hDlg) tumor suppressor. Recombinant GAKIN exhibits potent microtubule gliding activity but has little microtubule-stimulated ATPase activity in solution, suggesting that it exists in an autoinhibitory form. In vitro binding measurements revealed that defined segments of GAKIN, particularly the MAGUK binding stalk (MBS) domain and the motor domain, mediate intramolecular interactions to confer globular protein conformation. Direct binding of the SH3-I3-GUK module of hDlg to the MBS domain of GAKIN activates the microtubule-stimulated ATPase activity of GAKIN by approximately 10-fold. We propose that the cargo-mediated regulation of motor activity constitutes a general paradigm for the activation of kinesins.
Collapse
Affiliation(s)
| | | | - Athar H. Chishti
- * To whom correspondence should be addressed: A.H.C. (e-mail: , phone: 312-355-1293, Fax: 312-355-1297, mailing address: 909 S. Wolcott Ave. COMRB Room 5100, Chicago IL 60612, USA)
| |
Collapse
|
47
|
Sarang Z, Mádi A, Koy C, Varga S, Glocker MO, Ucker DS, Kuchay S, Chishti AH, Melino G, Fésüs L, Szondy Z. Tissue transglutaminase (TG2) facilitates phosphatidylserine exposure and calpain activity in calcium-induced death of erythrocytes. Cell Death Differ 2007; 14:1842-4. [PMID: 17612588 PMCID: PMC3968852 DOI: 10.1038/sj.cdd.4402193] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Z Sarang
- Department of Biochemistry and Molecular Biology, Signaling and Apoptosis Research Group, Hungarian Academy of Sciences, University of Debrecen, Debrecen H-4012, Hungary
| | - A Mádi
- Department of Biochemistry and Molecular Biology, Signaling and Apoptosis Research Group, Hungarian Academy of Sciences, University of Debrecen, Debrecen H-4012, Hungary
- Proteome Center Rostock, Medical Faculty, University of Rostock, Rostock D-18055, Germany
| | - C Koy
- Proteome Center Rostock, Medical Faculty, University of Rostock, Rostock D-18055, Germany
| | - S Varga
- Clinical Research Center, Laboratory for Electron Microscopy, University of Debrecen, Debrecen H-4012, Hungary
| | - MO Glocker
- Proteome Center Rostock, Medical Faculty, University of Rostock, Rostock D-18055, Germany
| | - DS Ucker
- Department of Microbiology and Immunology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | - S Kuchay
- Department of Pharmacology, University of Illinois College of Medicine,Chicago, IL 60612, USA
| | - AH Chishti
- Department of Pharmacology, University of Illinois College of Medicine,Chicago, IL 60612, USA
| | - G Melino
- Fondazione S Lucia, Roma, Italy and Medical Research Council, Toxicology Unit, Hodgkin bld, Leicester LE1 9HN, UK
| | - L Fésüs
- Department of Biochemistry and Molecular Biology, Signaling and Apoptosis Research Group, Hungarian Academy of Sciences, University of Debrecen, Debrecen H-4012, Hungary
| | - Z Szondy
- Department of Biochemistry and Molecular Biology, Signaling and Apoptosis Research Group, Hungarian Academy of Sciences, University of Debrecen, Debrecen H-4012, Hungary
- Corresponding author: Z Szondy, Department of Biochemistry and Molecular Biology, University of Debrecen, Nagyerdei krt.98., Debrecen H-4012, Hungary. Tel: + 36 52 416432; Fax: + 36 52 314989;
| |
Collapse
|
48
|
Yamada KH, Hanada T, Chishti AH. [Transport of PIP3 mediated by kinesin regulates neuronal cell polarity]. Tanpakushitsu Kakusan Koso 2007; 52:893-9. [PMID: 17642273] [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] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
|
49
|
Kuchay SM, Kim N, Grunz EA, Fay WP, Chishti AH. Double knockouts reveal that protein tyrosine phosphatase 1B is a physiological target of calpain-1 in platelets. Mol Cell Biol 2007; 27:6038-52. [PMID: 17576811 PMCID: PMC1952154 DOI: 10.1128/mcb.00522-07] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [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] [Indexed: 12/19/2022] Open
Abstract
Calpains are ubiquitous calcium-regulated cysteine proteases that have been implicated in cytoskeletal organization, cell proliferation, apoptosis, cell motility, and hemostasis. Gene targeting was used to evaluate the physiological function of mouse calpain-1 and establish that its inactivation results in reduced platelet aggregation and clot retraction potentially by causing dephosphorylation of platelet proteins. Here, we report that calpain-1 null (Capn1-/-) platelets accumulate protein tyrosine phosphatase 1B (PTP1B), which correlates with enhanced tyrosine phosphatase activity and dephosphorylation of multiple substrates. Treatment of Capn1-/- platelets with bis(N,N-dimethylhydroxamido)hydroxooxovanadate, an inhibitor of tyrosine phosphatases, corrected the aggregation defect and recovered impaired clot retraction. More importantly, platelet aggregation, clot retraction, and tyrosine dephosphorylation defects were rescued in the double knockout mice lacking both calpain-1 and PTP1B. Further evaluation of mutant mice by the ferric chloride-induced arterial injury model suggests that the Capn1-/- mice are relatively resistant to thrombosis in vivo. Together, our results demonstrate that PTP1B is a physiological target of calpain-1 and suggest that a similar mechanism may regulate calpain-1-mediated tyrosine dephosphorylation in other cells.
Collapse
Affiliation(s)
- Shafi M Kuchay
- Department of Pharmacology, UIC Cancer Center, University of Illinois at Chicago, 909 South Wolcott Avenue, Room 5097, Chicago, IL 60612-3725, USA
| | | | | | | | | |
Collapse
|
50
|
Li X, Chen H, Jeong JJ, Chishti AH. BDA-410: a novel synthetic calpain inhibitor active against blood stage malaria. Mol Biochem Parasitol 2007; 155:26-32. [PMID: 17583361 PMCID: PMC1993804 DOI: 10.1016/j.molbiopara.2007.05.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [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: 01/22/2007] [Revised: 04/24/2007] [Accepted: 05/10/2007] [Indexed: 11/21/2022]
Abstract
Falcipains, the papain-family cysteine proteases of the Plasmodium falciparum, are potential drug targets for malaria parasite. Pharmacological inhibition of falcipains can block the hydrolysis of hemoglobin, parasite development, and egress, suggesting that falcipains play a key role at the blood stage of parasite life cycle. In the present study, we evaluated the anti-malarial effects of BDA-410, a novel cysteine protease inhibitor as a potential anti-malarial drug. Recombinant falcipain (MBP-FP-2B) and P. falciparum trophozoite extract containing native falcipains were used for enzyme inhibition studies in vitro. The effect of BDA-410 on the malaria parasite development in vitro as well as its anti-malarial activity in vivo was evaluated using the Plasmodium chabaudi infection rodent model. The 50% inhibitory concentrations of BDA-410 were determined to be 628 and 534nM for recombinant falcipain-2B and parasite extract, respectively. BDA-410 inhibited the malaria parasite growth in vitro with an IC(50) value of 173nM causing irreversible damage to the intracellular parasite. In vivo, the BDA-410 delayed the progression of malaria infection significantly using a mouse model of malaria pathogenesis. The characterization of BDA-410 as a potent inhibitor of P. falciparum cysteine proteases, and the demonstration of its efficacy in blocking parasite growth both in vitro and in vivo assays identifies BDA-410 is an important lead compound for the development of novel anti-malarial drugs.
Collapse
Affiliation(s)
| | | | | | - Athar H. Chishti
- * Corresponding author. Tel.: 1-312-355-1293; Fax: 1-312-355-1297. E-mail: (A.C. Chishti)
| |
Collapse
|