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Chiu YL, Wu YY, Barndt RB, Lin YW, Sytwo HP, Cheng A, Yang K, Chan KS, Wang JK, Johnson MD, Lin CY. Differential subcellular distribution renders HAI-2 a less effective protease inhibitor than HAI-1 in the control of extracellular matriptase proteolytic activity. Genes Dis 2020; 9:1049-1061. [PMID: 35685459 PMCID: PMC9170578 DOI: 10.1016/j.gendis.2020.12.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 12/02/2020] [Indexed: 01/09/2023] Open
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Chiu YL, Wu YY, Barndt RB, Yeo YH, Lin YW, Sytwo HP, Liu HC, Xu Y, Jia B, Wang JK, Johnson MD, Lin CY. Aberrant regulation favours matriptase proteolysis in neoplastic B-cells that co-express HAI-2. J Enzyme Inhib Med Chem 2019; 34:692-702. [PMID: 30777474 PMCID: PMC6383611 DOI: 10.1080/14756366.2019.1577831] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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] [Indexed: 11/28/2022] Open
Abstract
Matriptase is ectopically expressed in neoplastic B-cells, in which matriptase activity is enhanced by negligible expression of its endogenous inhibitor, hepatocyte growth factor activator inhibitor (HAI)-1. HAI-1, however, is also involved in matriptase synthesis and intracellular trafficking. The lack of HAI-1 indicates that other related inhibitor, such as HAI-2, might be expressed. Here, we show that HAI-2 is commonly co-expressed in matriptase-expressing neoplastic B-cells. The level of active matriptase shed after induction of matriptase zymogen activation in 7 different neoplastic B-cells was next determined and characterised. Our data reveal that active matriptase can only be generated and shed by those cells able to activate matriptase and in a rough correlation with the levels of matriptase protein. While HAI-2 can potently inhibit matriptase, the levels of active matriptase are not proportionally suppressed in those cells with high HAI-2. Our survey suggests that matriptase proteolysis might aberrantly remain high in neoplastic B-cells regardless of the levels of HAI-2.
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Affiliation(s)
- Yi-Lin Chiu
- a Lombardi Comprehensive Cancer Center, Department of Oncology , Georgetown University , Washington , DC, USA.,b Department of Biochemistry , National Defense Medical Center , Taipei , Taiwan
| | - Yi-Ying Wu
- c Division of Hematology/Oncology, Department of Internal Medicine , Tri-Service General Hospital, National Defense Medical Center , Taipei , Taiwan
| | - Robert B Barndt
- a Lombardi Comprehensive Cancer Center, Department of Oncology , Georgetown University , Washington , DC, USA
| | - Yee Hui Yeo
- a Lombardi Comprehensive Cancer Center, Department of Oncology , Georgetown University , Washington , DC, USA
| | - Yu-Wen Lin
- a Lombardi Comprehensive Cancer Center, Department of Oncology , Georgetown University , Washington , DC, USA.,b Department of Biochemistry , National Defense Medical Center , Taipei , Taiwan
| | - Hou-Ping Sytwo
- d School of Medicine , National Defense Medical Center , Taipei , Taiwan
| | - Huan-Cheng Liu
- a Lombardi Comprehensive Cancer Center, Department of Oncology , Georgetown University , Washington , DC, USA.,e Langley High School , McLean , VA, USA
| | - Yuan Xu
- a Lombardi Comprehensive Cancer Center, Department of Oncology , Georgetown University , Washington , DC, USA
| | - Bailing Jia
- a Lombardi Comprehensive Cancer Center, Department of Oncology , Georgetown University , Washington , DC, USA.,f Department of Gastroenterology , Henan Provincial People's Hospital , Zhengzhou , China
| | - Jehng-Kang Wang
- b Department of Biochemistry , National Defense Medical Center , Taipei , Taiwan
| | - Michael D Johnson
- a Lombardi Comprehensive Cancer Center, Department of Oncology , Georgetown University , Washington , DC, USA
| | - Chen-Yong Lin
- a Lombardi Comprehensive Cancer Center, Department of Oncology , Georgetown University , Washington , DC, USA
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