Publications by authors named "Yun-Yuan Chen"

Background And Objectives: An extra health screening, including glycated haemoglobin (HbA1c), total cholesterol (TC) and low-density lipoprotein cholesterol (LDL-C), was initiated for regular donors aged over 40 in Taiwan in November 2015. This study aimed to determine its benefits on donor health management and retention.

Materials And Methods: A stratified random mail survey was conducted among donors who received HbA1c, TC and LDL-C screening between November 2015 and June 2017 to investigate their awareness of the screening, medical histories and post-screening behaviours.

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Article Synopsis
  • The study examines the impact of the SARS-CoV-2 Omicron surge on blood donation safety in Taiwan, highlighting a shift from containment to mitigation strategies in COVID-19 control from 2020 to 2022.
  • A dramatic increase in post-donation information (PDI) related to COVID-19 was observed, with reports rising from only 8 cases before 2022 to 3,483 cases during 2022, largely driven by younger female donors.
  • Testing of blood samples from COVID-19 donors revealed no SARS-CoV-2 RNA, indicating effective safety measures, while high levels of anti-spike antibodies suggested widespread immune response among the population.
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Background: The World Health Organization aims for the global elimination of cervical cancer, necessitating modeling studies to forecast long-term outcomes.

Objective: This paper introduces a macrosimulation framework using age-period-cohort modeling and population attributable fractions to predict the timeline for eliminating cervical cancer in Taiwan.

Methods: Data for cervical cancer cases from 1997 to 2016 were obtained from the Taiwan Cancer Registry.

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Article Synopsis
  • The Taiwanese government aimed to control a COVID-19 outbreak caused by variant B.1.429 before rolling out a universal vaccination program, focusing on high-risk regions.
  • A study analyzed blood samples from 10,000 donors to check for antibodies against SARS-CoV-2, finding a very low seroprevalence rate of 2 out of 10,000, with no positive cases among 2,000 donors tested for the virus itself.
  • Results indicated that effective epidemic control measures, including contact tracing and isolation, were successful in limiting the transmission of SARS-CoV-2 prior to widespread vaccination efforts.
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Background And Objectives: Securing an adequate blood supply relies on accurate knowledge of blood donors and donation practices. As published evidence on Asian populations is sparse, this study aims to gather up-to-date information on blood donors and donation practices in Asia to assist planning and strategy development.

Materials And Methods: Ten blood collection agencies (BCAs) provided 12 months' data on donors who met eligibility criteria or were deferred, as well as details of their donation practices.

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Background: Perioperative fresh frozen plasma (FFP) is commonly transfused to patients undergoing liver resection for hepatocellular carcinoma (HCC), but its impacts in this population remain unknown. This study aimed to investigate the association of perioperative FFP transfusion with short-term and long-term outcomes in these patients.

Methods: We retrospectively identified and retrieved clinical data for HCC patients undergoing liver resection between March, 2007 and December, 2016.

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Background: Evidence for mitigation of transfusion-transmitted dengue informed by surveillance data is lacking. In this study, we evaluated the risk of positive dengue viral (DENV) ribonucleic acid (RNA) from blood transfusions during a large outbreak in Taiwan.

Methods: Serum collected from blood donors living in districts experiencing the dengue epidemic were tested for DENV RNA using a qualitative transcription-mediated nucleic acid amplification assay (TMA).

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Due to excessive clinical blood usage and a rapidly aging population, an impending blood shortage in Taiwan is inevitable. This study aimed to determine the potential blood deficit in Taiwan in 2030. The numbers of units of whole blood (WB) donated and red blood cells (RBC) transfused will increase from 1,182,973 to 1,115,803 in 2018 to 1,230,500 and 1,250,760 in 2030, respectively.

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Article Synopsis
  • The study evaluated factors affecting outcomes in patients with platinum-sensitive recurrent epithelial ovarian carcinoma (EOC) using data from the National Health Insurance Research database in Taiwan from 2000 to 2013.
  • Among 1038 patients, those treated with the platinum + paclitaxel (PT) regimen showed the best five-year overall survival (OS) rates compared to other treatment groups.
  • The analysis indicated that the duration between platinum therapies significantly impacted survival outcomes, suggesting that PT is optimal for patients with a therapy-free interval of 6-12 months, while patients with longer intervals (>12 months) can benefit from either platinum-based or non-platinum chemotherapy options.
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  • Seven viruses, including EBV, HBV, HCV, KSHV, HIV-1, HTLV-1, and HPV, are classified as Group 1 human carcinogens by the IARC based on epidemiological and mechanistic studies.
  • These viruses can directly or indirectly cause various cancers, with some individuals developing cancer while others do not, highlighting the complexity of cancer risk associated with these infections.
  • Research has led to the development of risk calculators to predict the likelihood of specific cancers related to these viruses, and effective interventions like vaccination and antiviral therapies have shown a reduction in cancer incidence.
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The prevalence of hepatitis C virus (HCV) infection in Taiwan was approximately 4% a decade ago, much higher than the worldwide average. This study aimed to assess the HCV burden among 4 million voluntary blood donors after 2 decades of prevention and treatment policies. We retrieved screening results for anti-HCV and HCV RNA from the Database for Evaluating Voluntary Taiwanese Eligible Donors.

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Recent blood distribution profiles for transfusions in Taiwan have not been comprehensively documented. This study aimed to analyze trends in red blood cell (RBC), platelet, and plasma distribution rates, and compares these profiles with those in other countries. The distribution rates of RBC, platelets, and plasma in Taiwan during 2015 were 47.

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Objective: To investigate the progression risk of atypical squamous cells of undetermined significance (ASCUS) with different clinical managements.

Methods: Women with their first diagnosis of ASCUS cytology were retrieved from the national cervical cancer screening database and linked to the national health insurance research database to identify the management of these women. The incidences of developing cervical intraepithelial neoplasia grade 3 and invasive cervical cancer (CIN3+) were calculated, and the hazard ratios (HRs) were estimated using a Cox proportional hazards model.

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We analyzed the management and risk of subsequent cervical intraepithelial neoplasm 3 (CIN3) and invasive cervical cancer in women with low-grade squamous intraepithelial lesion (LSIL) cytology. A total of 53,293 women with a new diagnosis of cytologic LSIL were identified in Taiwan's national cervical screening registration database. Based on the retrieved clinical management data, the incidence of subsequent CIN3+ lesions was determined, and the hazard ratios (HRs) were estimated using a Cox proportional hazards model.

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Objective: Adjuvant chemotherapy was introduced in patients with early-stage ovarian cancer (OC). The benefit of standard chemotherapeutic regimens including taxane has not been established.

Methods: Patients with early-stage OC from the National Health Insurance Research database of Taiwan who received platinum plus cyclophosphamide (CP) or platinum plus paclitaxel (PT) for 3-6 cycles were recruited, and the disease-free survival (DFS) and overall survival (OS) were determined.

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We evaluated the prevalence of and risk factors for hypersensitivity reactions related to carboplatin, which is commonly used to treat gynecological malignancies. All women with pathologically documented ovarian, fallopian tube, or primary peritoneal cancer treated with carboplatin alone or a carboplatin-based combination chemotherapy regimen at a single hospital between January 2006 and December 2013 were retrospectively recruited. We analyzed the incidence, characteristics, risk factors, management, and outcomes of carboplatin-related hypersensitivity reactions among these patients.

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Objective: To evaluate the influence of age, screening interval, and histologic type on the effect of Pap smears in cervical cancer screening.

Materials And Methods: Data were retrieved from the Taiwan National Cancer Registry and Cervical Cancer Screening Registration System for the period from 2002 to 2010. Age, Pap smear interval, FIGO stage, and histology were further analyzed.

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We compared multiplex E6 messenger ribonucleic acid (mRNA) tests using real-time quantitative reverse transcriptase polymerase chain reactions (PCR) with human papillomavirus (HPV) DNA subtypes using a MY11/GP6+ PCR-based reverse-blot assay to identify cervical intraepithelial neoplasias of grade 2 or worse (CIN2+). In total, 684 women were studied, of whom 377 (55%) were diagnosed with CIN2+ histologically. The specificity of HPV mRNA to predict histological CIN2+ was higher than that of HPV DNA (81.

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Objective: To evaluate the screening efficacy and importance of atypical squamous cells and atypical glandular cells in predicting subsequent cervical cancer risk.

Methods: This national cohort study in Taiwan analyzed associations between Pap test screening frequency and findings in 1995-2000 and subsequent risk of squamous cell carcinoma and adenocarcinoma after 2002. Women aged 30 years or older in 1995 without a cervical cancer history were included.

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Introduction: Human papillomavirus (HPV) has been consistently implicated in causing several kinds of malignancies, and two HPV oncogenes, E6 and E7, represent two potential target antigens for cancer vaccines. We developed two fusion protein vaccines, PE(ΔIII)/E6 and PE(ΔIII)/E7 by targeting these two tumor antigens to test whether a combination of two fusion proteins can generate more potent anti-tumor effects than a single fusion protein.

Materials And Methods: In vivo antitumor effects including preventive, therapeutic, and antibody depletion experiments were performed.

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