Publications by authors named "Hsu Chih-Yun"

Article Synopsis
  • Clostridium innocuum, once thought harmless, is a resistant bacterium linked to various infections and gastrointestinal issues, prompting a study on its genetic makeup and pathogenic potential.
  • The research involved analyzing 112 isolates to identify genetic variations and measure biofilm production, revealing significantly different biofilm-producing capacities among genetically distinct groups.
  • Findings indicate that a specific genetic clade of C. innocuum creates substantial biofilms, enhancing its resistance to high levels of vancomycin, potentially contributing to its pathogenicity.
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Objectives: This study aimed to explore the care needs, challenges, and experiences of cancer care among sexual and gender minority (SGM) cancer survivors in Taiwan.

Methods: Semi-structured interviews were conducted face-to-face or telephonically with 30 SGM cancer survivors in Taiwan. Data were analyzed using the socio-ecological model and the constant comparative technique.

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Article Synopsis
  • A new sublineage of emm1 group A Streptococcus (GAS) called M1 is spreading in Europe, North America, and Australia but has not yet been detected in Asia, despite the presence of scarlet fever-associated prophages in some Asian isolates.
  • The study analyzed 181 GAS isolates from various years, confirming the presence of M1 strains in Taiwan and their association with specific toxins after the 2011 Hong Kong scarlet fever outbreak.
  • Results indicate that while M1 strains were identified in Taiwan, their increase wasn't seen until after 2021, likely due to the COVID-19 pandemic, emphasizing the need for ongoing monitoring of M1 and related diseases now that restrictions have eased.
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Background: Health disparities exist among lesbian, gay, bisexual, and transgender (LGBT) populations worldwide. However, student nurses and nurse staff have limited knowledge and skills in providing culturally competent nursing care for LGBT patients in Taiwan.

Objectives: This paper describes the development, implementation, and evaluation of an online training program for the cultural competence of student nurses and nurses in Taiwan.

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RopB is a quorum-sensing regulator that binds to the SpeB-inducing peptide (SIP) under acidic conditions. SIP is known to be degraded by the endopeptidase PepO, whose transcription is repressed by the CovR/CovS two-component regulatory system. Both SIP-bound RopB (RopB-SIP) and SIP-free RopB (apo-RopB) can bind to the promoter; however, only RopB-SIP activates transcription.

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Gender identity is a topic of growing interest in mental health research. People with non-conforming gender identity are prone to suffer from stigmatization and bullying, and often present with psychiatric issues. Transgender denotes the broad spectrum of individuals who identify differently from their assigned gender.

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Article Synopsis
  • Staphylococcus argenteus is usually more treatable with antibiotics than Staphylococcus aureus, but resistant strains have emerged in patients undergoing multiple treatments.
  • The study involved testing eleven S. argenteus samples with varying vancomycin doses to observe changes in drug resistance and biofilm production.
  • Results showed that most of the isolates developed increased resistance to vancomycin and enhanced biofilm production, indicating a potentially dangerous shift toward lower antibiotic susceptibility.
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The acquisition of the phage-encoded superantigen by scarlet fever-associated group A (, GAS) is found in North Asia. Nonetheless, the impact of acquiring by GAS in invasive infections is unclear. This study initially analyzed the prevalence of + GAS among isolates from sterile tissues and blood.

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The control of the virulence response regulator and sensor (CovR-CovS) two-component regulatory system in group A (GAS) strains regulates more than 15% of gene expression and has critical roles in invasive GAS infection. The membrane-embedded CovS has kinase and phosphatase activities, and both are required for modulating the phosphorylation level of CovR. Regulator of Cov (RocA) is a positive regulator of and also been shown to be a pseudokinase that interacts with CovS to enhance the phosphorylation level of CovR; however, how RocA modulates the activity of CovS has not been determined conclusively.

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CovR/CovS is a two-component regulatory system in group A and primarily acts as a transcriptional repressor. The D53 residue of CovR (CovR) is phosphorylated by the sensor kinase CovS, and the phosphorylated CovR protein binds to the intergenic region of to inhibit transcription. Nonetheless, the transcription of and is suppressed in mutants.

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  • Researchers studied how certain genes suppress tumor growth in liver cancer (HCC) and identified 19 key candidates, focusing on PTPRF as a significant tumor suppressor.
  • PTPRF is activated during cell contact when cells proliferate, leading to reduced cell growth and tumor formation, whereas silencing PTPRF causes increased cell proliferation and cancer growth.
  • The down-regulation of PTPRF was commonly observed in various cancers, including HCC, suggesting that enhancing PTPRF function could lead to better cancer treatment outcomes.
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Unlabelled: Intrahepatic metastasis is the primary cause of the high recurrence and poor prognosis of human hepatocellular carcinoma (HCC). However, neither its molecular mechanisms nor markers for its prediction before hepatectomy have been identified. We recently revealed up-regulation of erythroblastic leukemia viral oncogene homolog 3 (ERBB3) in human HCC.

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Frequent intrahepatic metastasis causes early tumor recurrence and dismaying prognosis of human hepatocellular carcinoma (HCC). We recently identified overexpression of stathmin1 (STMN1) in human HCC. This study was designed to elucidate the clinical and biological significance of overexpression of STMN1 in HCC.

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Evading apoptosis is pivotal in both of carcinogenesis and resistance to anticancer therapy. We investigated the molecules and pathways of apoptosis evasion in human hepatoma cells by irradiating hepatoma cells with optimized UV (so-called "hormetic responses"). Proteins and pathways related to hormetic responses were identified via proteomic approaches followed by reconstruction of function-networks.

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Female tadpoles of Rana catesbeiana were laparotomized at metamorphic stages XI-XIII and an empty capsule or one containing cyanoketone (CK), which is an inhibitor of Δ -3β-hydroxysteroid dehydrogenase (Δ -3β-HSD), was implanted intraperitoneally. Ovarian activity of Δ -3β-HSD was examined histochemically 2 months later, estradiol-17β (E ) secretion by the ovaries was measured by RIA 4 months later and histological changes of the ovaries were examined 6 months later. The Δ -3β-HSD activity of the CK-treated ovaries was much lower than that of controls.

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Ovaries of hypophysectomized Rana catesbeiana tadpoles. weighing I to 14 g, were prepared for electron microscopic study. The oocytes are at the growth phase, ranging from 50 to 190 μm in diameter.

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