Publications by authors named "Chai A"

Auto-concentrated growth factor (CGF) constitutes the latest generation of plasma extract, and has high concentrations of growth factors and white blood cells. Due to the continuous variable speed centrifugation used during preparation, the tensile strength of the fibrin is also higher. CGF preparation does not involve the use of animal serum, minimizing the risk of infection and immune rejection.

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  • The study aims to evaluate the effectiveness of combining pembrolizumab with platinum and gemcitabine (PG) as a first-line treatment for recurrent or metastatic head and neck squamous cell carcinoma (HNSCC) in Malaysia, comparing it to the existing treatment with pembrolizumab plus platinum and 5-fluorouracil (PF).
  • It is a phase 2, open-label, multicenter study enrolling up to 89 participants, where pembrolizumab will be administered alongside chemotherapy for six cycles, and various response and safety metrics will be assessed.
  • The trial has received ethical approval and its results will be shared through conferences and scientific publications, aiming to contribute valuable findings to cancer treatment discussions.
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Using rich longitudinal data from Australia, we investigate the mental health impacts and behaviours of migration resettlement in Australia, focusing on age, gender and locus of control as possible modifiers. We find that age profiles in mental health differ significantly between migrant and native populations. Our analysis of second-generation migrants supports the 'healthy migrant paradox', suggesting favourable mental health outcomes.

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Objective: The optimal level of resident autonomy in emergency colorectal surgery is unclear. This study assessed perioperative outcomes in patients undergoing emergency colectomy with end stoma based on the presence of an attending surgeon.

Participants: A retrospective analysis was conducted at a tertiary teaching hospital, including 360 patients who underwent emergency colectomy with end stoma between 2013 and 2023.

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Oral squamous cell carcinoma (OSCC) is known to be driven by multiple intricated receptor tyrosine kinases (RTKs) including EGFR, PI3K/AKT and MAPK signaling pathways. However, whilst targeting EGFR with cetuximab has been approved for the treatment of OSCC, other single-agent inhibitors of the RTKs have shown modest effects in improving survival. From the genome-wide CRISPR/Cas9 screen on 21 OSCC cell lines, we have identified among the top essential genes in OSCC.

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  • Purple stem mustards, cultivated in the Yangtze River Valley, are facing a serious threat from a soft rot disease, resulting in 20-30% plant loss and severe economic impact in Wuhan, China as of February 2023.
  • Infected plants show symptoms like water-soaked bases, foul odors, and pus-like discharges, eventually leading to death.
  • Researchers isolated 15 strains of bacteria from affected plants, identifying three representative strains through biochemical tests and genetic analysis, aiming to determine the specific cause of the soft rot outbreak.
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  • Lettuce, a cool-season crop from the Asteraceae family, was affected by a leaf disease in Beijing, China, showing dark lesions and a disease incidence of 10-40%.
  • Infected leaves exhibited translucent spots that developed into large necrotic areas, prompting a series of tests on bacteria isolated from the samples.
  • Pathogenicity tests on lettuce confirmed the disease symptoms within 7-10 days after exposure to specific bacterial isolates, which were then analyzed genetically to determine their identity.
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The city of Belo Horizonte is a state capital in Brazil with 2.7 million people. The city is remarkable for its stubbornly high and stable levels of domestic violence, and for having implemented very restrictive responses to the COVID-19 pandemic.

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Mechanistically guided drug repurposing has been made possible by systematically integrating pharmacologic and CRISPR-Cas9 screen data. Our study discovers the biomarker and cell death mechanisms underpinning sensitivity toward AZD5582, an antagonist of the inhibitor of apoptosis family protein. Our findings have important implications for improving future trial design for patients with OSCC using this emerging drug class.

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Coating seeds with biocontrol agents represents an effective approach for managing soil-borne plant diseases. However, improving the viability of biocontrol microorganisms on the seed surface or in the rhizosphere remains a big challenge due to biotic and abiotic stresses. In this work, we developed a microbial seed coating strategy that uses sporopollenin exine capsules (SECs) as carriers for the encapsulation of the biofilm-like biocontrol bacteria.

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: There is a growing concern that opioids and benzodiazepines can depress the respiratory drive and could contribute to worsening respiratory failure and higher exacerbation frequency in COPD. However, the relationship between the exacerbation rate and medication taken is poorly understood in patients with chronic respiratory failure due to COPD. : As part of a service evaluation project, we analysed 339 patients with COPD who were established on long-term non-invasive ventilation (LT-NIV) at our tertiary centre.

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Depression and periodic limb movement disease are both common disorders which frequently co-exist. Furthermore, antidepressants are known to cause and worsen periodic limb movements in sleep, which can worsen the quality of sleep and subsequently daytime symptoms. However, the effect of antidepressants on periodic limb movements is not uniform and depends on their mechanism of action.

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  • Broccoli, a valuable vegetable in China, is facing a serious leaf spot disease that has caused about 60% incidence in a Weifang City field, leading to significant economic impacts.
  • *The disease manifests as dark, circular spots on leaves, which can develop into holes due to tissue decay.
  • *Lab analysis of affected samples revealed 12 similar bacterial strains, which were characterized as Gram-negative, aerobic, and rod-shaped, with the ability to utilize various sugars.
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Advances in sequencing technologies have facilitated the identification of the genes and mechanisms for many inherited skin diseases. Although targeted nucleic acid therapeutics for diseases in other organs have begun to be deployed in patients, the goal of precise therapeutics for skin diseases has not yet been realized. First, we review the current and emerging nucleic acid-based gene-editing and delivery modalities.

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Microbial seed coatings serve as effective, labor-saving, and ecofriendly means of controlling soil-borne plant diseases. However, the survival of microbial agents on seed surfaces and in the rhizosphere remains a crucial challenge. In this work, we embedded a biocontrol bacteria (Bacillus subtilis ZF71) in sodium alginate (SA)/pectin (PC) hydrogel as a seed coating agent to control Fusarium root rot in cucumber.

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Chinese cabbage (Brassica rapa L. ssp. pekinensis), in the family Brassicaceae, is a widely planted crop in China valued for its nutritional benefits.

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The therapeutic efficacy of donor lymphocyte infusions (DLIs) given after allogeneic hematopoietic cell transplantation (HCT) is limited by risk of graft-versus-host disease (GVHD). Post-transplantation cyclophosphamide (PTCy) effectively prevents severe GVHD, but there are limited data on outcomes of DLIs given to PTCy-treated patients. We reviewed 162 consecutive PTCy-treated patients transplanted between 2015-2022 within the Center for Immuno-Oncology at the National Cancer Institute.

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In this work, the conformational behaviors of ring polyelectrolyte in tetravalent salt solutions are discussed in detail through molecular dynamics simulation. For simplification, here we have neglected the effect of the twisting interaction, although it has been well known that both bending and twisting interactions play a deterministic in the steric conformation of a semiflexible ring polymer. The salt concentration and the bending energy take a decisive role in the conformation of the ring polyelectrolyte (PE).

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  • Total hip arthroplasty (THA) is a highly successful surgery but can lead to complications like dislocations and infections, prompting the use of dual-mobility (DM) implants designed to enhance stability and motion.
  • A systematic review analyzed data from nine studies involving 22,277 patients to compare the safety and effectiveness of DM versus fixed-bearing (FB) implants for THA.
  • Results showed that DM implants significantly reduced dislocations and hospital stay length, but FB implants had a shorter operative time; no major differences were found in patient-reported outcomes or other complications between the two groups.*
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  • Vasopressin is often used in intensive care for patients in severe vasodilatory shock due to its ability to constrict blood vessels and enhance water reabsorption in the kidneys.
  • A case study is presented of a 59-year-old male who developed transient diabetes insipidus after five days of vasopressin treatment for septic shock, characterized by significant urine output and increased sodium levels after the medication was stopped.
  • This case highlights the importance of recognizing the potential for transient diabetes insipidus as a consequence of vasopressin withdrawal, especially as the patient's symptoms resolved quickly without major medical intervention.
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Introduction Osteoarthritis (OA) is an age-related degenerative joint disease. There is a 25% risk of symptomatic hip OA in patients who live up to 85 years of age. It can impair a person's daily activities and increase their reliance on healthcare services.

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This study explores the offender, victim, and environmental characteristics that significantly influence the number of days a sexual homicide victim remains undiscovered. Utilizing a sample of 269 cases from the Homicide Investigation Tracking System database an in-depth analysis was conducted to unveil the factors contributing to the delay in the discovery of victims' bodies. The methodological approach involves applying a negative binomial regression analysis, which allows for the examination of count data, specifically addressing the over-dispersion and excess zeros in the dependent variable - the number of days until the victim is found.

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  • In April 2023, severe soft rot symptoms were noted in commercial broccoli fields in Yunnan, China, leading to over 50% yield loss with plants showing rotten roots and emitting foul odors.
  • To identify the cause, symptomatic stems were sterilized, plated on nutrient agar, and three bacterial isolates were analyzed, showing characteristics aligned with Pectobacterium polaris.
  • Genomic DNA was extracted and analyzed through sequencing of the 16S rRNA and nine housekeeping genes, confirming the isolates belonged to the genus Pectobacterium, as verified by BLASTn analysis.
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Instigated by olfactory analysis of odorant molecules, the constitutions of 3,4-dihydrocoumarins prepared by PIFA-based oxidative cyclizations of 3-arylpropionic acids were revised by means of 2D NMR and X-ray analysis. Supported by computational analysis, the migratory mechanism of intermediate spirolactonic cations has been amended: 1,2-alkyl shifts instead of 1,2-carboxylic shifts were selectively obtained.

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