Kok Ooi Kong

Kok Ooi Kong

orcid

Research Focus & Metrics

Academic Career Length

25Years (2002-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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10 May 2021 in International Journal of Rheumatic Diseases
Verified
Journal Article
Open access
PDF file
ASAmelia Santosa
Amelia Santosa
CXChuanhui Xu
Chuanhui Xu
TAThaschawee Arkachaisri
Thaschawee Arkachaisri
KKKok Ooi Kong
Kok Ooi Kong
ALAisha Lateef
Aisha Lateef
MLManjari Lahiri
Manjari Lahiri
Aim: People with rheumatic diseases (PRD) remain vulnerable in the era of the COVID‐19 pandemic. We formulated recommendations to meet the urgent need for a consensus for vaccination against SARS‐CoV‐2 in PRD.Methods: Systematic literature reviews were performed to evaluate: (a) outcomes in PRD with COVID‐19; (b) efficacy, immunogenicity and safety of COVID‐19 vaccination; and (c) published guidelines/recommendations for non‐live, non‐COVID‐19 vaccinations in PRD. Recommendations were formulated based on the evidence and expert opinion according to the Grading of Recommendations Assessment, Development and Evaluation methodology.Results: The consensus comprises 2 overarching principles and 7 recommendations. Vaccination against SARS‐CoV‐2 in PRD should be aligned with prevailing national policy and should be individualized through shared decision between the healthcare provider and patient. We strongly recommend that eligible PRD and household contacts be vaccinated against SARS‐CoV‐2. We conditionally recommended that the COVID‐19 vaccine be administered during quiescent disease if possible. Immunomodulatory drugs, other than rituximab, can be continued alongside vaccination. We conditionally recommend that the COVID‐19 vaccine be administered prior to commencing rituximab if possible. For patients on rituximab, the vaccine should be administered a minimum of 6 months after the last dose and/or 4 weeks prior to the next dose of rituximab. Post‐vaccination antibody titers against SARS‐CoV‐2 need not be measured. Any of the approved COVID‐19 vaccines may be used, with no particular preference.Conclusion: These recommendations provide guidance for COVID‐19 vaccination in PRD. Most recommendations in this consensus are conditional, reflecting a lack of evidence or low‐level evidence.

30 July 2007 in Arthritis Care & Research
Verified
Journal Article
Closed access
PDF file
KKKok Ooi Kong
Kok Ooi Kong
HHHsu Juang Ho
Hsu Juang Ho
HHHwee Siew Howe
Hwee Siew Howe
BTBernard Yu-Hor Thong
Bernard Yu-Hor Thong
TLTsui Yee Lian
Tsui Yee Lian
TGTan Tock Seng Hospital Systemic Lupus Erythematosus Study Group
Tan Tock Seng Hospital Systemic Lupus Erythematosus Study Group

1 March 2002 in Lupus
Verified
Journal Article
Closed access
KKKok Ooi Kong
Kok Ooi Kong
EKE-T Koh
E-T Koh
HLH-Y Lee
H-Y Lee
KWK-P Wee
K-P Wee
PFP-H Feng
P-H Feng
Medium-sized artery aneurysms are rare in patients with systemic lupus erythematosus (SLE). We report on a 21-year-old Chinese man with SLE and secondary antiphospholipid syndrome (APS) who presented with acute abdominal pain due to a ruptured right hepatic artery aneurysm. He was also found to have aneurysms of the left hepatic artery and splenic artery on autopsy. There have been only eight cases of hepatic artery aneurysm and one case of splenic artery aneurysm associated with SLE in the English literature. Abdominal aneurysm must be suspected in SLE patients presenting with acute abdominal pain, haemoperitoneum or occult bleeding.

13 March 2025 in Best Practice & Research Clinical Rheumatology
Verified
Journal Article
Closed access
YKYing Xi Kong
Ying Xi Kong
KKKok Ooi Kong
Kok Ooi Kong

14 June 2024 in International Journal of Rheumatic Diseases
Verified
Journal Article
Closed access
ALAnita Lee
Anita Lee
KKKok Ooi Kong
Kok Ooi Kong
LCLi‐Ching Chew
Li‐Ching Chew
KIKei Ikeda
Kei Ikeda
AAAhmed Abogamal
Ahmed Abogamal
BDBhaskar Dasgupta
Bhaskar Dasgupta

9 July 2025 in Vaccines
Verified
Journal Article
Open access
PDF file
XLXin Rong Lim
Xin Rong Lim
SLShi Yu Liu
Shi Yu Liu
HHH.S. Howe
H.S. Howe
KLKhai Pang Leong
Khai Pang Leong
EEElampirai Elangovan
Elampirai Elangovan
BLBernard Leung
Bernard Leung
Background/Objectives: Neutralizing autoantibodies against type I interferons, particularly interferon-alpha (IFN-α), have been implicated in severe COVID-19 outcomes. This study investigated the prevalence and functional significance of anti-IFN-α autoantibodies (AAbs) in hospitalized unvaccinated COVID-19 patients and their association with COVID-19 disease severity. Methods: We retrospectively analyzed serum samples from 122 hospitalized COVID-19 patients (asymptomatic/mild: n = 69, moderate: n = 35, severe/critical: n = 18) and 32 healthy uninfected controls. Anti-IFN-α AAbs were quantified using a commercial enzyme-linked immunosorbent assay (ELISA) kit, with functional neutralization assessed via competitive ELISA and STAT1 phosphorylation inhibition. Statistical comparisons were performed using one-way ANOVA for parametric data and the Kruskal–Wallis test for non-parametric variables. Results: Anti-IFN-α AAbs were detected in 24.6% of COVID-19 patients, with all clinical subgroups showing significantly higher titers compared to healthy controls (p < 0.05). Although no significant differences in anti-IFN-α AAb levels were found between mild, moderate, and severe cases, patients with severe or critical COVID-19 had markedly higher mean titers (10,511.3 ng/mL) compared to non-severe (mild + moderate) cases (375.2 ng/mL, p < 0.001). Strongly neutralizing anti-IFN-α AAbs, with high titers (>20,000 ng/mL) and the ability to inhibit STAT1 phosphorylation, were identified in three severe COVID-19 cases. Anti-IFN-α AAb levels correlated positively with CRP (r = 0.80, p < 0.0001), LDH (r = 0.80, p = 0.001), and neutrophil count (r = 0.52, p = 0.003), and negatively with lymphocyte count (r = −0.59, p = 0.0006). Conclusions: Elevated and functionally neutralizing anti-IFN-α AAbs were associated with severe COVID-19. These findings support their role as a risk factor for poor outcomes and emphasize the importance of early COVID-19 vaccination. Screening may help identify high-risk individuals, particularly those unvaccinated or with immune vulnerabilities.