Gregory J. Tsay

ORCID: 0000-0003-3817-8229
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About
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Research Areas
  • Systemic Lupus Erythematosus Research
  • Rheumatoid Arthritis Research and Therapies
  • Polyamine Metabolism and Applications
  • T-cell and B-cell Immunology
  • Parvovirus B19 Infection Studies
  • Blood properties and coagulation
  • Systemic Sclerosis and Related Diseases
  • Monoclonal and Polyclonal Antibodies Research
  • Phagocytosis and Immune Regulation
  • Erythrocyte Function and Pathophysiology
  • Dermatological and COVID-19 studies
  • Amino Acid Enzymes and Metabolism
  • Cell Adhesion Molecules Research
  • Salivary Gland Disorders and Functions
  • Gout, Hyperuricemia, Uric Acid
  • Blood groups and transfusion
  • Bone Metabolism and Diseases
  • Immune Cell Function and Interaction
  • Chronic Lymphocytic Leukemia Research
  • Hepatitis C virus research
  • Pancreatitis Pathology and Treatment
  • COVID-19 Clinical Research Studies
  • SARS-CoV-2 and COVID-19 Research
  • Hepatitis B Virus Studies
  • Polyomavirus and related diseases

China Medical University
2015-2024

China Medical University Hospital
2015-2024

China Medical University
2023-2024

National Yang Ming Chiao Tung University
2015-2022

Chung Shan Medical University
2007-2016

National Health Research Institutes
2015

Chung Shan Medical University Hospital
2004-2014

Taipei Institute of Pathology
2014

Czech Academy of Sciences, Institute of Microbiology
2013

Institute of Immunology
2002-2007

Abstract The coronavirus SARS-CoV-2 is the causative agent of ongoing severe acute respiratory disease pandemic COVID-19. Tissue and cellular tropism one key to understanding pathogenesis SARS-CoV-2. We investigate expression subcellular localization receptor, angiotensin-converting enzyme 2 (ACE2), within upper (nasal) lower (pulmonary) tracts human donors using a diverse panel banked tissues. Here, we report our discovery that ACE2 receptor protein robustly localizes motile cilia airway...

10.1038/s41467-020-19145-6 article EN cc-by Nature Communications 2020-10-28

6-Gingerol, a natural component of ginger, has been widely reported to possess antiinflammatory and antitumorigenic activities. Despite its potential efficacy against cancer, the anti-tumor mechanisms 6-gingerol are complicated remain sketchy. In present study, we aimed investigate effects on colon cancer cells. Our results revealed that treatment significantly reduced cell viability human cell, LoVo, in dose-dependent manner. Further flow cytometric analysis showed induced significant G2/M...

10.1155/2012/326096 article EN Evidence-based Complementary and Alternative Medicine 2012-01-01

Transglutaminase 2 (TG2) is an inducible transamidating acyltransferase that catalyzes Ca(2+)-dependent protein modifications. In addition to being enzyme, TG2 also serves as a G for several seven transmembrane receptors and acts co-receptor integrin β1 β3 integrins distinguishing it from other members of the transglutaminase family. ubiquitously expressed in almost all cell types compartments, present on surface gets secreted extracellular matrix via non-classical mechanisms. has been...

10.1051/bmdcn/2017070315 article EN cc-by Biomedicine 2017-08-25

Serum samples from 94 patients with systemic lupus erythematosus (SLE) a medical unit in Singapore were analysed for autoantibodies of 10 different specificities. The prevalence antibodies to the following antigens was as follows: double stranded (ds) DNA (43%), histone (81%), Sm (26%), nuclear ribonuclear protein (nRNP) (32%), SS-A(Ro) (63%), SS-B(La) (12%), SL/Ki (9%), ribosomal RNP (rRNP) (16%), p70/p80 (5%), proliferating cell antigen (PCNA) (3%). Except higher anti-SS-A(Ro), other...

10.1136/ard.47.11.918 article EN Annals of the Rheumatic Diseases 1988-11-01

Objective. To examine (1) the risk of death from cardiovascular disease (CVD) and all causes in patients with gout who do not undergo urate-lowering therapy (ULT), (2) effect ULT on mortality gout. Methods. In this prospective case-matched cohort study, 40,623 Taiwanese individuals aged ≥ 17 years were followed for 6.5 years. Mortality rate was compared between 1189 did receive reference subjects (no gout, no ULT) matched age, sex, index date diagnosis (1:3 gout/reference subjects), 764...

10.3899/jrheum.141542 article EN The Journal of Rheumatology 2015-06-15

Background/Aim: The programmed death 1 (PD-1) receptor and its ligand (PD-L1) play pivotal roles in regulating host immune responses. However, the inhibitory effects of this pathway on function tumor infiltrating T lymphocytes gastric adenocarcinoma patients are not well-defined. Materials Methods: We characterized expression PD-1 PD-L1 peripheral blood cells analyzed association between PD-1/PD-L1 disease progression a cohort 60 with Helicobacter pylori infection, including 18...

10.21873/anticanres.12446 article EN Anticancer Research 2018-03-28

Methods. Sera from 72 patients with systemic lupus erythematosus (SLE), 23 rheumatoid arthritis (RA), 18 Sjögren's syndrome (SS), eight Raynaud's phenomenon (RP), five primary biliary cirrhosis (PBC), polymyositis (PM), four erythema infectiosum (EI) and 22 normal controls were examined for parvovirus B19 (B19) infection by serological assays, nested PCR Southern blotting.

10.1093/rheumatology/40.2.152 article EN Lara D. Veeken 2001-02-01

Objectives An increased risk of mortality in patients with hyperuricemia has been reported. We examined (1) the all-cause and cardiovascular disease (CVD) untreated hyperuricemic who did not receive urate-lowering therapy (ULT), (2) impact ULT on hyperuricemia. Methods In this retrospective case-matched cohort study during a mean follow-up 6.4 years, 40,118 Taiwanese individuals aged ≥17 years had never used gout were examined. The rate was compared between 3,088 reference subjects (no...

10.1371/journal.pone.0145193 article EN cc-by PLoS ONE 2015-12-18

Gastric cancer is one of the most common malignant cancers with a poor prognosis and high mortality rate worldwide. Current treatment gastric includes surgery chemotherapy as main modalities, but potentially severe side-effects present considerable challenge. Gallic acid trihydroxybenzoic found to exert an anticancer effect against variety cells. The purpose this study was determine anti-cancer activity Galla chinensis its component gallic on human adenocarcinoma cells.MTT assay cell death...

10.21873/anticanres.12445 article EN Anticancer Research 2018-03-28

We investigated the expression and subcellular localization of SARS-CoV-2 receptor, angiotensin-converting enzyme 2 (ACE2), within upper (nasal) lower (pulmonary) respiratory tracts healthy human donors. detected ACE2 protein cilia organelle ciliated airway epithelial cells, which likely represents initial or early site viral entry during transmission. further determined whether in cells was influenced by patient demographics, clinical characteristics, co-morbidities, medication use, found...

10.1101/2020.05.08.20092866 preprint EN cc-by-nd medRxiv (Cold Spring Harbor Laboratory) 2020-05-12

Hepatitis C virus (HCV) infection has been found to be strikingly associated with autoimmune phenomena. The aim of the present study was investigate presence various autoantibodies in patients HCV infection. Anti-neutrophil cytoplamic antibody (ANCA), anti-dihydrolipoamide dehydrogenase (anti-E3), rheumatoid factor (RF), acetyltransferase (anti-E2), anti-SS-A/Ro (60 kD), (52 anti-SS-B/La, anti-topoisomerase II (anti-topo II), anti-cardiolipin (aCL), anti-dsDNA, anti-ssDNA, anti-nuclear...

10.1046/j.1365-2249.2002.01827.x article EN Clinical & Experimental Immunology 2002-05-01

Human parvovirus B19 has been found in various tissues addition to erythroid lineage cells, and non-structural protein (NS1) is reported induce cytotoxicity apoptosis but the mechanism non-permissive cells still unclear. To address this issue, we have constructed NS1 gene a cytomegalovirus episomal vector, pEGFP-C1 transfected it into monkey epithelial COS-7. EGFP-NS1 expression was monitored assessed by fluorescence microscopy, RT-PCR Western blot. The flow cytometric analysis showed that...

10.1080/00365540410016230 article EN Scandinavian Journal of Infectious Diseases 2004-08-01

SUMMARY: Aim: Acute pyelonephritis is a common infectious disease in children and can result permanent renal damage. Interleukin (IL)‐1β an important inflammatory mediator that appears early during bacterial infection. This prospective study examined urine IL‐1β levels with acute documented by 99m Tc‐dimercaptosuccinic acid (DMSA) scan, also evaluated whether this cytokine correlated scarring. Methods: A total of 75 aged 1–121 months diagnosis first‐time febrile urinary tract infection (UTI)...

10.1111/j.1440-1797.2007.00819.x article EN Nephrology 2007-07-12
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