1.The glutamate-serine-glycine index as a biomarker to monitor the effects of bariatric surgery on non-alcoholic fatty liver disease
Nichole Yue Ting Tan ; Elizabeth Shumbayawonda ; Lionel Tim-Ee Cheng ; Albert Su Chong Low ; Chin Hong Lim ; Alvin Kim Hock Eng ; Weng Hoong Chan ; Phong Ching Lee ; Mei Fang Tay ; Jason Pik Eu Chang ; Yong Mong Bee ; George Boon Bee Goh ; Jianhong Ching ; Kee Voon Chua ; Sharon Hong Yu Han ; Jean-Paul Kovalik ; Hong Chang Tan
Journal of the ASEAN Federation of Endocrine Societies 2024;39(2):54-60
Objective:
Bariatric surgery effectively treats non-alcoholic fatty liver disease (NAFLD). The glutamate-serine-glycine (GSG) index has emerged as a non-invasive diagnostic marker for NAFLD, but its ability to monitor treatment response remains unclear. This study investigates the GSG index's ability to monitor NAFLD's response to bariatric surgery.
Methodology:
Ten NAFLD participants were studied at baseline and 6 months post-bariatric surgery. Blood samples were collected for serum biomarkers and metabolomic profiling. Hepatic steatosis [proton density fat fraction (PDFF)] and fibroinflammation (cT1) were quantified with multiparametric magnetic resonance imaging (mpMRI), and hepatic stiffness with magnetic resonance elastography (MRE). Amino acids and acylcarnitines were measured with mass spectrometry. Statistical analyses included paired Student’s t-test, Wilcoxon-signed rank test, and Pearson’s correlation.
Results:
Eight participants provided complete data. At baseline, all had hepatic steatosis (BMI 39.3 ± 5.6 kg/m2, PDFF ≥ 5%). Post-surgery reductions in PDFF (from 12.4 ± 6.7% to 6.2 ± 2.8%, p = 0.013) and cT1 (from 823.3 ± 85.4ms to 757.5 ± 41.6ms, p = 0.039) were significant, along with the GSG index (from 0.272 ± 0.03 to 0.157 ± 0.05, p = 0.001).
Conclusion
The GSG index can potentially be developed as a marker for monitoring the response of patients with NAFLD to bariatric surgery.
Non-alcoholic Fatty Liver Disease
;
Amino Acids
;
Metabolomics
2.Endoscopic internal drainage with double pigtail stents for upper gastrointestinal anastomotic leaks: suitable for all cases?
Bin Chet TOH ; Jingli CHONG ; Baldwin PM YEUNG ; Chin Hong LIM ; Eugene KW LIM ; Weng Hoong CHAN ; Jeremy TH TAN
Clinical Endoscopy 2022;55(3):401-407
Background/Aims:
Surgeons and endoscopists have started to use endoscopically inserted double pigtail stents (DPTs) in the management of upper gastrointestinal (UGI) leaks, including UGI anastomotic leaks. We investigated our own experiences in this patient population.
Methods:
From March 2017 to June 2020, 12 patients had endoscopic internal drainage of a radiologically proven anastomotic leak after UGI surgery in two tertiary UGI centers. The primary outcome measure was the time to removal of the DPTs after anastomotic healing. The secondary outcome measure was early oral feeding after DPT insertion.
Results:
Eight of the 12 patients (67%) required only one DPT, whereas four (33%) required two DPTs. The median duration of drainage was 42 days. Two patients required surgery due to inadequate control of sepsis. Of the remaining 10 patients, nine did not require a change in DPT before anastomotic healing. Nine patients were allowed oral fluids within the 1st week and a soft diet in the 2nd week. One patient was allowed clear oral feeds on the 8th day after DPT insertion.
Conclusions
Endoscopic internal drainage is becoming an established minimally invasive technique for controlling anastomotic leak after UGI surgery. It allows for early oral nutritional feeding and minimizes discomfort from conventional external drainage.
3.Novel transdermal device for delivery of triamcinolone for nail psoriasis treatment.
Yik Weng YEW ; Crystal Zhen Yu PHUAN ; Xiahong ZHAO ; Eugene Sern Ting TAN ; Wei Sheng CHONG ; Hong Liang TEY
Annals of the Academy of Medicine, Singapore 2022;51(1):16-23
INTRODUCTION:
Nail psoriasis treatment is challenging due to difficult drug delivery and systemic therapy toxicities. Self-dissolvable microneedle patches embedded with corticosteroids offers a potentially rapid, minimally invasive drug delivery platform with good efficacy and minimal adverse side effects.
METHODS:
We conducted a 4-month prospective randomised controlled trial. Subjects with psoriatic nails were randomised to receive microneedle device delivered topical steroids on one hand and control treatment (topical Daivobet gel) on the other. Two independent dermatologists blinded to the treatment assignment scored their Nail Psoriasis Severity Index (NAPSI) during visits at baseline, 2 and 4 months. All treatment was discontinued after 2 months. Average NAPSI score on each hand was analysed.
RESULTS:
A total of 25 participants were recruited, aged 22 to 73 years. Majority were Chinese (72%), followed by Indian and Malay. There was equal randomisation of treatment to the left and right nail. While there was a rapid significant improvement in average NAPSI score for the control arm at 2 months, the treatment arm had a greater, more sustained improvement of the NAPSI score at 4 months. The average NAPSI score improved for both treatment and control group at 4 months compared to baseline. However, only the NAPSI value improvement in the controls at 2 months compared to baseline was statistically significant (P=0.0039). No severe adverse effects were reported.
CONCLUSION
To the best of our knowledge, this is the first prospective randomised control trial comparing microneedle technology against conventional topical steroids in nail psoriasis treatment. Our findings demonstrate microneedle technology is as efficacious as topical therapy.
Humans
;
Nail Diseases/drug therapy*
;
Nails
;
Prospective Studies
;
Psoriasis/drug therapy*
;
Triamcinolone
4.Feasibility of Single-Stage Posterior Passive Correction and Fusion Surgery for Congenital Scoliosis in Adolescent Patients Who Have Attained Skeletal Maturity
Chee Kidd CHIU ; Rommel Lim TAN ; Siti Mariam Abd GANI ; Jessamine Sze Lynn CHONG ; Weng Hong CHUNG ; Chris Yin Wei CHAN ; Mun Keong KWAN
Asian Spine Journal 2022;16(3):315-325
Methods:
Patients with congenital scoliosis who underwent SSPPCF using a pedicle screw system were reviewed. We identified the following three surgical indications: (1) hemivertebra or wedge vertebra over the thoracic or thoracolumbar region with structural lumbar curves, (2) hemivertebra or wedge vertebra at the lumbar region with significant pelvic obliquity or sacral slanting, and (3) mixed or complex congenital scoliosis. The demographic, perioperative, and radiographic data of these patients were collected.
Results:
Thirty-four patients were reviewed. The mean patient age was 14.6±3.4 years. There were 13 hemivertebrae, three wedged vertebrae, two butterfly vertebrae, three hemivertebrae with butterfly vertebra, eight unsegmented bars, and five multiple complex lesions. The average surgical duration was 219.4±68.8 minutes. The average blood loss was 1,208.4±763.5 mL. Seven patients required allogeneic blood transfusion. The mean hospital stay duration was 6.1±2.5 days. The complication rate was 11.8% (4/34): one patient had severe blood loss, one had rod breakage, and two had distal adding-on. The Cobb angle reduced from 65.9°±17.4° to 36.3°±15.3° (p<0.001) with a correction rate (CR) of 44.8%±17.4%. The regional kyphotic angle decreased from 39.9°±20.5° to 27.5°±13.9° (p=0.001) with a CR of 19.3%±49.6%. Radiographic parameters (radiographic shoulder height, clavicle angle, T1 tilt, cervical axis, pelvic obliquity, coronal balance, and apical vertebral translation) showed significant improvement postoperatively.
Conclusions
SSPPCF was a feasible option for adolescent patients with congenital scoliosis who were skeletally matured.
5.ABILITY TO PAY AND WILLINGNESS TO PAY FOR CATARACT SURGERY AND OBSTETRIC CONSULTATION: A CASE STUDY OF A MALAYSIAN PUBLIC HOSPITAL
Weng Hong Fun ; Ee Hong Tan ; Sondi Sararaks ; Suhana Jawahir ; Nurul Salwana Abu Bakar
Journal of University of Malaya Medical Centre 2022;25(2):135-144
Background:
Household ability to pay (ATP) and public willingness to pay (WTP) for cataract surgery and obstetric consultation, the two commonly utilised private healthcare services in Malaysian public hospitals are largely unknown. This study assessed the patients’ ATP and the WTP for these services.
Methods:
A cross-sectional study was conducted among respondents visiting outpatient clinics in an urban tertiary public hospital. Source of payment for healthcare used by the World Health Survey was used to assess ATP, while contingent valuation was used to elicit respondents’ WTP by asking their WTP for a shorter waiting time for cataract surgery or an obstetric consultation. Chi-square test, Fisher’s exact tests, and binary logistic regression were performed in the analyses.
Results:
No significant differences were observed for ATP between public and private respondents. Almost one quarter (23.5%) of total respondents used unaffordable sources for their healthcare services. More than a quarter (26.7%) of the public respondents were willing to pay for private user fees or higher and a proportion of them (14.8%) reported using unaffordable sources for healthcare services. Logistic regression showed that respondents reporting multiple affordable sources of payment were 3.7 times more likely to be willing to pay for these services after adjusting for other factors, compared with the use of a single affordable source.
Conclusion
Although the majority reported using affordable sources of payment for health services, a small fraction claimed the use of unaffordable resources. The use of multiple affordable sources for healthcare payment influences WTP in seeking private services for cataract surgery and obstetric consultation.
6.Sagittal Radiographic Parameters of the Spine in Three Physiological Postures Characterized Using a Slot Scanner and Their Potential Implications on Spinal Weight-Bearing Properties
Hwee Weng Dennis HEY ; Nathaniel Li-Wen NG ; Khin Yee Sammy LOH ; Yong Hong TAN ; Kimberly-Anne TAN ; Vikaesh MOORTHY ; Eugene Tze Chun LAU ; Gabriel LIU ; Hee-Kit WONG
Asian Spine Journal 2021;15(1):23-31
Methods:
We recruited young patients with nonspecific low back pain for <3 months, who were otherwise healthy. Each patient had EOS images taken in the flexed, erect and extended positions, in random order, as well as magnetic resonance imaging to assess for disk degeneration. Angular and disk height measurements were performed and compared in all three postures using paired t-tests. Changes in disk height relative to the erect posture were caclulated to determine the alignment-specific load-bearing area of each FSU.
Results:
Eighty-three patients (415 lumbar intervertebral disks) were studied. Significant alignment changes were found between all three postures at L1/2, and only between erect and flexion at the other FSUs. Disk height measurements showed that the neutral axis of the spine, marked by zones where disk heights did not change, varied between postures and was level specific. The load-bearing areas were also found to be more anterior in flexion and more posterior in extension, with the erect spine resembling the extended spine to a greater extent.
Conclusions
Load-bearing areas of the lumbar spine are sagittal alignment-specific and level-specific. This may imply that, depending on the surgical realignment strategy, attention should be paid not just to placing an intervertebral cage “as anterior as possible” for generating lordosis, but also on optimizing load-bearing in the lumbar spine.
8.Protective effects of Elabela on kidney injury in db/db diabetic mice and its possible mechanism
Yudi XU ; Min SHI ; Juan CHEN ; Wensha GU ; Yaqin WENG ; Wendong XU ; Dongjin TAN ; Hong ZHANG
Chinese Journal of Endocrinology and Metabolism 2020;36(10):871-875
Objective:To investigate the protective effects of Elabela(ELA) on the renal injury of db/db mice and its possible mechanism.Methods:Sixteen eight-week-old male db/db mice were intraperitoneally injected with ELA(5 mg·kg -1·day -1) or equivalent normal saline( n=8) for 8 weeks. Eight age-matched male db/m mice received equivalent normal saline injection as normal control. At the end of the experiment, blood and urine samples were obtained for HbA 1C and urinary albumin/creatinine(ACR) measurements. Immunohistochemistry was used to observe the expression of ELA. Histopathological changes in kidney tissue were observed by HE staining and Masson staining. The levels of collagen type Ⅳ(Col-Ⅳ) and transforming growth factor-β1(TGF-β1) as well as Yes-associated protein(YAP) phosphorylation in kidney tissue were examined by western blot. Results:Immunohistochemistry results showed that ELA expression was decreased in the renal tissue of db/db mice as compared with that of db/m mice( P<0.05). After ELA treatment, ACR and blood pressure were markedly decreased in db/db mice( P<0.05), but without significant changes in the body weight and HbA 1C. Renal tubular epithelial cells edema, basement membrane thickening, and increased collagen fiber in db/db were improved by ELA administration. Compared with db/m mice, the levels of TGF-β1 and Col-Ⅳ expression, as well as YAP phosphorylation were significantly increased in renal tissue of db/db mice(0.98±0.08 vs 0.68±0.10, 1.10±0.14 vs 0.51±0.08, 3.38±0.72 vs 0.81±0.13, all P<0.05), which were down-regulated after ELA administration(0.80±0.06, 0.51±0.05, 2.21±0.22, all P<0.05). Conclusion:ELA may improve the renal injury of db/db mice by regulating the signaling pathway of YAP, thereby delaying the development of diabetic nephropathy.
9.Bioequivalence and pharmacokinetic comparison of two fixed dose combination of Metformin/Glibenclamide formulations in healthy subjects under fed condition
Chang Chee Tao ; Ang Ju Ying ; Wong Jia Woei ; Tan Siew Siew ; Chin Siaw Kuen ; Lim Ai Beoy ; Tan Weng Hong ; Yuen Kah Hay
The Medical Journal of Malaysia 2020;75(3):286-291
Aim: This study is conducted to compare the
pharmacokinetic profiles of two fixed dose combination of
metformin/glibenclamide tablets (500mg/5 mg per tablet).
Materials and Methods: This is a single-center, single-dose,
open-label, randomized, 2-treatment, 2-sequence and 2-
period crossover study with a washout period of 7 days. All
28 adult male subjects were required to fast for at least 10
hours prior to drug administration and they were given
access to water ad libitum during this period. Thirty minutes
prior to dosing, all subjects were served with a standardized
high-fat and high-calorie breakfast with a total calorie of
1000 kcal which was in accordance to the EMA Guideline on
the Investigation of Bioequivalence. Subsequently, subjects
were administered either the test or reference preparation
with 240mL of plain water in the first trial period. During the
second trial period, they received the alternate preparation.
Plasma levels of glibenclamide and metformin were
analysed separately using two different high performance
liquid chromatography methods.
Results: The 90% confidence interval (CI) for the ratio of the
AUC0-t, AUC0-∞, and Cmax of the test preparation over
those of the reference preparation were 0.9693–1.0739,
0.9598– 1.0561 and 0.9220 – 1.0642 respectively. Throughout
the study period, no serious drug reaction was observed.
However, a total of 26 adverse events (AE)/side effects were
reported, including 24 that were definitely related to the
study drugs, namely giddiness (n=17), while diarrheoa (n=3),
headache (n=2) and excessive hunger (n=2) were less
commonly reported by the subjects.
Conclusion: It can be concluded that the test preparation is
bioequivalent to the reference preparation.
10. Epidemiology of Sepsis-3 in a sub-district of Beijing: secondary analysis of a population-based database
Hong-Cheng TIAN ; Jian-Fang ZHOU ; Li WENG ; Xiao-Yun HU ; Jin-Min PENG ; Chun-Yao WANG ; Wei JIANG ; Xue-Ping DU ; Xiu-Ming XI ; You-Zhong AN ; Mei-Li DUAN ; Bin DU
Chinese Medical Journal 2019;132(17):2039-2045
Background:
With the publication of Sepsis-3 definition, epidemiological data based on Sepsis-3 definition from middle-income countries including China are scarce, which prohibits understanding of the disease burden of this newly defined syndrome in these settings. The purpose of this study was to describe incidence and outcome of Sepsis-3 in Yuetan sub-district of Beijing and to estimate the incidence rate of Sepsis-3 in China.
Methods:
The medical records of all adult residents hospitalized from July 1, 2012 to June 30, 2014 in Yuetan sub-district of Beijing were reviewed. Patients with sepsis-3 and severe sepsis/septic shock were identified. The incidence rates and mortality rate of sepsis-3 and sepsis/septic shock were calculated, incidence rates and in-hospital mortality rates were normalized to the population distribution in the 2010 National Census. Population incidence rate and case fatality rate between sexes were compared with the


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