Publications by authors named "Xiang-Yuan Chen"

Article Synopsis
  • Chronic granulomatous disease (CGD) is a genetic immune disorder leading to frequent infections, inherited in either X-linked or autosomal recessive forms, and this study explores the differences in symptoms (phenotypes) between these two forms using Human Phenotype Ontology (HPO) terms.
  • Data from 90 genetically diagnosed CGD patients from Asia and Africa were analyzed to compare the onset and types of infections experienced by X-linked (XL) and autosomal recessive (AR) patients.
  • Findings revealed that XL-CGD patients tend to have earlier onset and more severe infections, with specific symptoms like perianal abscess and BCGitis being more common, highlighting the need for distinguishing features for clinical diagnosis.
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Most hereditary diseases are incurable, but their deterioration could be delayed or stopped if diagnosed timely. It is thus imperative to explore the state-of-the-art and high-efficient diagnostic techniques for precise analysis of the symptoms or early diagnosis of pre-symptoms. Diagnostics based on clinical presentations, hard to distinguish different phenotypes of the same genotype, or different genotypes displaying similar phenotypes, are incapable of pre-warning the disease status.

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Evidence suggests that fasting exerts extensive antitumor effects in various cancers, including colorectal cancer (CRC). However, the mechanism behind this response is unclear. We investigate the effect of fasting on glucose metabolism and malignancy in CRC.

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Article Synopsis
  • Severe Combined Immunodeficiency (SCID) is life-threatening and requires timely treatment, often delayed due to lack of newborn screening; family history of infant deaths related to SCID contributes to quicker diagnoses.
  • In a study of 147 SCID patients, 94 had genetic diagnoses, revealing 88 different gene mutations, with an average diagnosis age of 4 months and a delay of 2 months in identification.
  • Family history led to earlier presentations and diagnoses, while infections like candidiasis were common but resulted in later diagnosis times; clinicians often missed the significance of family history in clinical assessments.*
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Resistance of cancer cells to chemoradiotherapy is a major clinical problem in pancreatic cancer treatment. Therefore, understanding the molecular basis of cellular resistance and identifying novel targets are essential for improving treatment efficacy for pancreatic cancer patients. Previous studies have demonstrated a significant role for Pim-3 in pancreatic cancer survival against gemcitabine-induced genotoxic stress.

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Background: Penicillium marneffei infection is indigenous to Southeast Asia. Majority of penicilliosis occurs in patients with AIDS, and less commonly with secondary immunodeficiencies. Penicilliosis is rare in otherwise healthy persons, but information on their immunological status is often lacking.

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Severe combined immunodeficiencies (SCID) are a group of rare inherited disorders with profound defects in T cell and B cell immunity. From 2005 to 2010, our unit performed testing for IL2RG, JAK3, IL7R, RAG1, RAG2, DCLRE1C, LIG4, AK2, and ZAP70 mutations in 42 Chinese and Southeast Asian infants with SCID adopting a candidate gene approach, based on patient's gender, immune phenotype, and inheritance pattern. Mutations were identified in 26 patients, including IL2RG (n = 19), IL7R (n = 2), JAK3 (n = 2), RAG1 (n = 1), RAG2 (n = 1), and DCLRE1C (n = 1).

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Introduction: X-linked agammagobulinemia (XLA) is a primary immunodeficiency disorder caused by Bruton's tyrosine kinase (Btk) gene mutation. Recent studies suggested genotype-phenotype correlation in XLA, but a definitive association remains controversial.

Patients And Methods: We examined the relationship between specific Btk gene mutations and severity of clinical presentation in 62 patients with XLA.

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Objective: Juvenile idiopathic arthritis (JIA) is generally considered to be caused by interaction of genetic and environmental factors. We investigated the association of a C-to-T transition in the promoter region of the CD14 gene on chromosome 5q31.1 and JIA in a Chinese Han population.

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