2
|
Rosenberg N, Dardik R, Hauschner H, Nakav S, Barel O, Luboshitz J, Yacobovich J, Tamary H, Kenet G. Mutations in RASGRP2 gene identified in patients misdiagnosed as Glanzmann thrombasthenia patients. Blood Cells Mol Dis 2021; 89:102560. [PMID: 33711653 DOI: 10.1016/j.bcmd.2021.102560] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 02/24/2021] [Accepted: 03/01/2021] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Glanzmann thrombasthenia (GT) is a severe inherited platelet function disorder (IPFD), presenting with bleeding diathesis and impaired platelet aggregation, is caused by mutations in the genes ITGA2B or ITGB3. AIM We aimed to study the genetic cause of IPFD mimicking GT. METHODS During 2017-2019, 16 patients were referred to our tertiary center with bleeding symptoms, impaired platelet aggregation and normal platelet count and size. RESULTS Using flow cytometry, 13/16 patients were diagnosed with GT, yet three patients displayed normal surface expression of the integrins αIIbβ3 and αvβ3, as well as normal integrin αIIbβ3 activation following incubation with the activating monoclonal antibody anti-LIBS6, while platelet activation following ADP or epinephrine was impaired. Whole exome sequencing detected 2 variants in RASGRP2 gene in all 3 patients. DISCUSSION Both RASGRP2 mutations predicted frameshift, premature stop codon (p. I427Mfs*92 and p. R494Afs*54, respectively) and truncated calcium-sensing guanine nucleotide exchange factor [CalDAG-GEFI]- the major signaling molecule that regulates integrin-mediated aggregation and granule secretion, causing IPFD-18. CONCLUSION Patients who suffer from bleeding diathesis without immune dysregulation, may be mistakenly diagnosed as GT. Further studies are required to confirm the diagnosis of specific IPFD.
Collapse
Affiliation(s)
- Nurit Rosenberg
- The Israeli National Hemophilia Center and Thrombosis Institute, Sheba Medical Center, Tel Hashomer, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel; Amalia Biron Research Institute of Thrombosis and Hemostasis, Sheba Medical Center, Tel Hashomer, and Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Rima Dardik
- The Israeli National Hemophilia Center and Thrombosis Institute, Sheba Medical Center, Tel Hashomer, Israel
| | - Hagit Hauschner
- The Israeli National Hemophilia Center and Thrombosis Institute, Sheba Medical Center, Tel Hashomer, Israel; Amalia Biron Research Institute of Thrombosis and Hemostasis, Sheba Medical Center, Tel Hashomer, and Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Sigal Nakav
- Coagulation and Hemostasis Laboratory, Hematology Laboratories, Rabin Medical Center, Beilinson Hospital, Petah Tikva, Israel
| | - Ortal Barel
- Bioinformatic Unit, Sheba Cancer Research Center, Tel-Hashomer, Israel
| | - Jacob Luboshitz
- The Israeli National Hemophilia Center and Thrombosis Institute, Sheba Medical Center, Tel Hashomer, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Joanne Yacobovich
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel; Pediatric Hematology, Schneider Children's Medical Center, Petach-Tikva; Israel
| | - Hannah Tamary
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel; Pediatric Hematology, Schneider Children's Medical Center, Petach-Tikva; Israel
| | - Gili Kenet
- The Israeli National Hemophilia Center and Thrombosis Institute, Sheba Medical Center, Tel Hashomer, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel; Amalia Biron Research Institute of Thrombosis and Hemostasis, Sheba Medical Center, Tel Hashomer, and Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.
| |
Collapse
|
3
|
Lind AL, Lai YYY, Mostovoy Y, Holloway AK, Iannucci A, Mak ACY, Fondi M, Orlandini V, Eckalbar WL, Milan M, Rovatsos M, Kichigin IG, Makunin AI, Johnson Pokorná M, Altmanová M, Trifonov VA, Schijlen E, Kratochvíl L, Fani R, Velenský P, Rehák I, Patarnello T, Jessop TS, Hicks JW, Ryder OA, Mendelson JR, Ciofi C, Kwok PY, Pollard KS, Bruneau BG. Genome of the Komodo dragon reveals adaptations in the cardiovascular and chemosensory systems of monitor lizards. Nat Ecol Evol 2019; 3:1241-1252. [PMID: 31358948 PMCID: PMC6668926 DOI: 10.1038/s41559-019-0945-8] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 06/13/2019] [Indexed: 01/24/2023]
Abstract
Monitor lizards are unique among ectothermic reptiles in that they have high aerobic capacity and distinctive cardiovascular physiology resembling that of endothermic mammals. Here, we sequence the genome of the Komodo dragon Varanus komodoensis, the largest extant monitor lizard, and generate a high-resolution de novo chromosome-assigned genome assembly for V. komodoensis using a hybrid approach of long-range sequencing and single-molecule optical mapping. Comparing the genome of V. komodoensis with those of related species, we find evidence of positive selection in pathways related to energy metabolism, cardiovascular homoeostasis, and haemostasis. We also show species-specific expansions of a chemoreceptor gene family related to pheromone and kairomone sensing in V. komodoensis and other lizard lineages. Together, these evolutionary signatures of adaptation reveal the genetic underpinnings of the unique Komodo dragon sensory and cardiovascular systems, and suggest that selective pressure altered haemostasis genes to help Komodo dragons evade the anticoagulant effects of their own saliva. The Komodo dragon genome is an important resource for understanding the biology of monitor lizards and reptiles worldwide.
Collapse
Affiliation(s)
| | - Yvonne Y Y Lai
- Cardiovascular Research Institute, University of California, San Francisco, CA, USA
| | - Yulia Mostovoy
- Cardiovascular Research Institute, University of California, San Francisco, CA, USA
| | | | - Alessio Iannucci
- Department of Biology, University of Florence, Sesto Fiorentino, Italy
| | - Angel C Y Mak
- Cardiovascular Research Institute, University of California, San Francisco, CA, USA
| | - Marco Fondi
- Department of Biology, University of Florence, Sesto Fiorentino, Italy
| | - Valerio Orlandini
- Department of Biology, University of Florence, Sesto Fiorentino, Italy
| | - Walter L Eckalbar
- Institute for Human Genetics, University of California, San Francisco, CA, USA
| | - Massimo Milan
- Department of Comparative Biomedicine and Food Science, University of Padova, Legnaro, Italy
| | - Michail Rovatsos
- Department of Ecology, Charles University, Prague, Czech Republic
- Institute of Animal Physiology and Genetics, The Czech Academy of Sciences, Liběchov, Czech Republic
| | - Ilya G Kichigin
- Institute of Molecular and Cellular Biology SB RAS, Novosibirsk, Russia
| | - Alex I Makunin
- Institute of Molecular and Cellular Biology SB RAS, Novosibirsk, Russia
| | - Martina Johnson Pokorná
- Department of Ecology, Charles University, Prague, Czech Republic
- Institute of Animal Physiology and Genetics, The Czech Academy of Sciences, Liběchov, Czech Republic
| | - Marie Altmanová
- Department of Ecology, Charles University, Prague, Czech Republic
- Institute of Animal Physiology and Genetics, The Czech Academy of Sciences, Liběchov, Czech Republic
| | | | - Elio Schijlen
- B.U. Bioscience, Wageningen University, Wageningen, The Netherlands
| | - Lukáš Kratochvíl
- Department of Ecology, Charles University, Prague, Czech Republic
| | - Renato Fani
- Department of Biology, University of Florence, Sesto Fiorentino, Italy
| | | | - Ivan Rehák
- Prague Zoological Garden, Prague, Czech Republic
| | - Tomaso Patarnello
- Department of Comparative Biomedicine and Food Science, University of Padova, Legnaro, Italy
| | - Tim S Jessop
- Centre for Integrative Ecology, Deakin University, Waurn Ponds, Victoria, Australia
| | - James W Hicks
- Department of Ecology and Evolutionary Biology, School of Biological Sciences, University of California, Irvine, CA, USA
| | - Oliver A Ryder
- Institute for Conservation Research, San Diego Zoo, Escondido, CA, USA
| | - Joseph R Mendelson
- Zoo Atlanta, Atlanta, GA, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Claudio Ciofi
- Department of Biology, University of Florence, Sesto Fiorentino, Italy
| | - Pui-Yan Kwok
- Cardiovascular Research Institute, University of California, San Francisco, CA, USA
- Institute for Human Genetics, University of California, San Francisco, CA, USA
- Department of Dermatology, University of California, San Francisco, CA, USA
| | - Katherine S Pollard
- Gladstone Institutes, San Francisco, CA, USA.
- Institute for Human Genetics, University of California, San Francisco, CA, USA.
- Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USA.
- Institute for Computational Health Sciences, University of California, San Francisco, CA, USA.
- Chan-Zuckerberg BioHub, San Francisco, CA, USA.
| | - Benoit G Bruneau
- Gladstone Institutes, San Francisco, CA, USA.
- Cardiovascular Research Institute, University of California, San Francisco, CA, USA.
- Department of Pediatrics, University of California, San Francisco, CA, USA.
| |
Collapse
|
4
|
Yun JW, Lee KO, Jung CW, Oh SY, Kim SH, Choi CW, Kim HJ. Hereditary platelet function disorder from RASGRP2 gene mutations encoding CalDAG-GEFI identified by whole-exome sequencing in a Korean woman with severe bleeding. Haematologica 2019; 104:e274-e276. [PMID: 30846498 DOI: 10.3324/haematol.2019.218487] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Jae Won Yun
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - Ki-O Lee
- Samsung Biomedical Research Institute, Samsung Medical Center
| | - Chul Won Jung
- Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine
| | - Soo-Young Oh
- Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine
| | - Sun-Hee Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| | - Chul Won Choi
- Division of Hematology and Oncology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - Hee-Jin Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
| |
Collapse
|
5
|
Liao CY, Lee CL, Wang HC, Liang SS, Kung PH, Wu YC, Chang FR, Wu CC. CLL2-1, a chemical derivative of orchid 1,4-phenanthrenequinones, inhibits human platelet aggregation through thiol modification of calcium-diacylglycerol guanine nucleotide exchange factor-I (CalDAG-GEFI). Free Radic Biol Med 2015; 78:101-10. [PMID: 25451646 DOI: 10.1016/j.freeradbiomed.2014.10.512] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Revised: 10/14/2014] [Accepted: 10/14/2014] [Indexed: 11/29/2022]
Abstract
CalDAG-GEFI is a guanine nucleotide exchange factor, which actives small GTPase Rap1 and plays an important role in platelet aggregation. Our previous study has shown that CalDAG-GEFI contains redox-sensitive thiols, and its function can be inhibited by thiol modification. In the present study, the effect of CLL2-1, a 1,4-phenanthrenequinone, on CalDAG-GEFI and platelet functions was investigated. In human platelets, CLL2-1 prevented platelet aggregation caused by various stimulators. Flow cytometric analysis revealed that CLL2-1 inhibited GPIIb/IIIa activation and P-selectin secretion. Moreover, CLL2-1 prevented Rap1 activation caused by thrombin, the Ca(2+) ionophore A23187, and the diacylglycerol mimetic phorbol 12-myristate 13-acetate, while only slightly inhibited thrombin-induced increases in [Ca(2+)]i and did not inhibit protein kinase C activation. Western blots after reducing SDS-PAGE showed that treatment of either platelets or platelet lysates with CLL2-1 led to a decrease of monomeric CalDAG-GEFI and appearance of cross-linked oligomers of CalDAG-GEFI, and these effects were inhibited by pretreatment of platelets or lysates with thiol reducing agents prior to the addition of CLL2-1, indicating thiol modification of CalDAG-GEFI by CLL2-1. Furthermore, the thiol reducing agents also prevented the inhibitory effect of CLL2-1 on Rap1 activation, GPIIb/IIIa activation, and platelet aggregation. In CalDAG-GEFI-overexpressing human embryonic kidney 293T cells, CLL2-1 also inhibited CalDAG-GEFI-mediated Rap1 activation. Taken together, our results suggest that the antiplatelet effect of CLL2-1 is due to, at least in part, inhibition of CalDAG-GEFI-mediated Rap1 activation, and provide the basis for development of novel antiplatelet drugs.
Collapse
Affiliation(s)
- Chieh-Yu Liao
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chia-Lin Lee
- School of Pharmacy, College of Pharmacy, China Medical University, Taichung, Taiwan
| | - Hui-Chun Wang
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shih-Shin Liang
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Po-Hsiung Kung
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yang-Chang Wu
- School of Pharmacy, College of Pharmacy, China Medical University, Taichung, Taiwan
| | - Fang-Rong Chang
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chin-Chung Wu
- Graduate Institute of Natural Products, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Marine Biotechnology and Resources, National Sun Yat-Sen University, Kaohsiung, Taiwan.
| |
Collapse
|