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Zhang, Jia,Chen, Lin-Ling,Guo, Zi-Fen,Peng, Cui-Ying,Liao, Duan-Fang,Li, Kai Korean Society for Biochemistry and Molecular Biol 2003 Journal of biochemistry and molecular biology Vol.36 No.6
The potential physiological role and technological application of the premature termination of DNA polymerization through the off-switch of exo+ polymerases were studied using 3' phosphorothioate-modified or unmodified primers with single base mismatch distal to the 3' terminus. With exonuclease-digestible unmodified primers, a gradient premature termination of DNA polymerization was observed when amplified with exo+ polymerases. With 3' allele specific phosphorothioate-modified primers, an efficient off-switch effect occurred in the discrimination of a single nucleotide polymorphism when directly using genomic DNA. Clearly, the off-switch of exo+ polymerases is useful in biomedical research.
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( Jia Zhang ),( Lin Ling Chen ),( Zi Fen Guo ),( Cui Ying Peng ),( Duan Fang Liao ),( Kai Li ) 생화학분자생물학회 2003 BMB Reports Vol.36 No.6
The potential physiological role and technological application of the premature termination of DNA polymerization through the off-switch of exo+ polymerases were studied using 3` phosphorothioate-modified or unmodified primers with single base mismatch distal to the 3` terminus. With exonuclease-digestible unmodified primers, a gradient premature termination of DNA polymerization was observed when amplified with exo+ polymerases. With 3` allele specific phosphorothioate-modified primers, an efficient off-switch effect occurred in the discrimination of a single nucleotide polymorphism when directly using genomic DNA. Clearly, the off-switch of exo+polymerases is useful in biomedical research.
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Risk Factors for Cervical Cancer in Rural Areas of Wuhan China: a Matched Case-control Study
Zhang, Bin,Zhou, Ai-Fen,Zhu, Chang-Cai,Zhang, Ling,Xiang, Bing,Chen, Zhong,Hu, Rong-Hua,Zhang, Ya-Qi,Qiu, Lin,Zhang, Yi-Ming,Xiong, Chao-Du,Du, Yu-Kai,Shi, Yu-Qin Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.12
Cervical cancer is a serious public health problem in developing countries. We investigated possible risk factors for cervical cancer in rural areas of Wuhan China using a matched case-control study with 33 women diagnosed with cervical cancer and 132 healthy women selected from the same area as matched controls. A questionnaire, which included questions about general demography conditions, environmental and genetic factors, the first sexual intercourse, first marriage age, age at first pregnancy, pregnancy first child's age, female personal health history, social psychological factors, dietary habits, smoking and alcohol status and other living habits was presented to all participants. At the same time, HPV infection of every participant was examined in laboratory testing. Results showed HPV infection (P<0.000, OR=23.4) and pregnancy first child's age (P<0.000, OR=13.1) to be risk factors for cervical cancer. Menopause (P=0.003, OR=0.073) was a protective factor against cervical cancer. However, there was no indication of associations of environmental (drinking water, insecticide, disinfectant) genetic (cancer family history), or life-style factors (smoking status, alcohol status, physical training, sleep quality), including dietary habits (intake of fruit and vegetable, meat, fried food, bean products and pickled food) or social psychological factors with cervical cancer. The results suggest that the risk of cervical cancer in Chinese rural women may be associated with HPV infection, menopause and the pregnancy first child's age.
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Chien-Ning Hsu,Ya-Ting Lin,Yu-Hsu Chen,Tsung-Yu Tseng,Hsing-Fen Tsai,Shinn-Gwo Hong,Chao-Ling Yao 한국생물공학회 2023 Biotechnology and Bioprocess Engineering Vol.28 No.3
Repair and regeneration of vascular tissue is a crucial current research focus in the fields of biomedical engineering and regenerative medicine. Numerous studies revealed that cells are required to grow on an appropriate extracellular matrix to maintain or enhance functionality. In the present study, various surface modification methods were evaluated to fix fibronectin on the surface of a bio-based and aligned poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) film for vascular tissue engineering. After chemical modification, the properties of the fibronectin-fixed PHBV films were examined and compared with the original films, including -NH2 group expression, contact angle, mechanical properties, and fibronectin binding amount. Then, cytotoxicity and biocompatibility were measured by culture with L929 cells and endothelial progenitor cells (EPCs) of the fibronectinfixed PHBV films. In addition, cell morphology, cell growth kinetics, acetylated low-density lipoprotein uptake ability, lectin binding ability and specific gene expressions of cultured EPCs on fibronectin-fixed PHBV films were also analyzed. Taken together, our data demonstrated that the surface of the aligned PHBV films could be successfully modified to immobilize fibronectin. Importantly, EPCs cultured on the fibronectin-fixed PHBV films showed excellent cell biocompatibility, a rapid proliferation rate, an aligned growth direction and correct cell functions. We believed that fibronectin-fixed PHBV films can serve as a potential scaffold for vascular tissue engineering.
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Long-term follow-up of neurocognitive function in patients with citrin deficiency and cholestasis
Tsai Meng-Ju Melody,Chang Jung-Chi,Lu Heng-Yu,Gau Susan Shur-Fen,Chien Yin-Hsiu,Hwu Wuh-Liang,Ni Yen-Hsuan,Chen Huey-Ling,Lee Ni-Chung 대한소아청소년과학회 2025 Clinical and Experimental Pediatrics (CEP) Vol.68 No.3
Background: Citrin deficiency is a rare metabolic disorder prevalent in East and Southeast Asia that affects liver or neurological function throughout various life stages. While early diagnosis and dietary management can improve prognosis for infant onset disease, data on long-term neurocognitive outcomes is scarce.Purpose: This study aimed to clarify whether transient metabolic disturbances during early childhood have a lasting effect on the neurocognitive function of individuals with citrin deficiency.Methods: Thirty patients diagnosed with citrin deficiency prior to 1 year of age underwent neuropsychological assessments including attention deficit/hyperactivity disorders (ADHD) and intelligence quotient (IQ). We compared the peak laboratory values during infancy between children who were versus were not later diagnosed with ADHD.Results: Neurocognitive assessments of 30 individuals with citrin deficiency aged 3–25 years revealed that full-scale IQ scores were normally distributed. Of this cohort, 47% (14 of 30) were diagnosed with ADHD: 6, 6, and 2 with the combined, inattentive, and hyperactive-impulsive types, respectively. This prevalence was higher than that in the general population (1.7%–16%). Moreover, a one-unit increase in ammonia levels before 1 year of age was associated with a 1.023-fold increase in the likelihood of future hyperactivity-impulsivity symptoms (P=0.038; 95%confidence interval, 1.001–1.046). Despite these findings, this long-term follow-up of individuals with citrin deficiency indicated that it had minimal impact on neurocognitive function, allowing for a generally normal life.Conclusion: Patients with a history of cholestasis caused by citrin deficiency during infancy have a greater incidence of ADHD than the general population, suggesting that metabolic disturbances during early childhood in individuals with citrin deficiency may have a long-term negative impact on their neurocognitive function.
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