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Direct modification of spermatogonial stem cells using lentivirus vectors in vivo leads to efficient generation of transgenic rats

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Asian Journal of Andrology 2019年第2期21卷 190-195页

作者： Bang-Jin Kim yong-Hee Kim Myeong-Geun Oh Ki-Jung Kim Sang-Eun Jung Ju-Hee Jin Sun-Uk Kim Kwan-sik Min Buom-yong Ryu Department of Animal Scienee and Technology College of Biotechnology and Natural ResourcesChung-Ang UniversityAnseongGyeonggi-do 17546Korea National Primate Research Center Korea Research Institute of Bioscienee and BiotechnologyCheongjuChungcheongbuk-do 28116Korea Futuristic Animal Resource and Research Center Korea Research Institute of Bioscience and BiotechnologyCheongjuChungcheongbuk-do 28116Korea Animal Biotechnology Graduate School of Future Con verge nee Tech no logyDepartment of Animal Life ScienceInstitute of Genetic Engi neeringHankyong National UniversityAnseongGyeon ggi-do 17579Korea Department of Cancer Biology University of PennsylvaniaPhiladelphiaPA 19104USA.

Spermatogonial stem cells(SSCs)transmit genetic information to the next progeny in ***,SSCs are a potential target for germ I i ne modifications to gen erate tran sgenic an *** this study,we report a technique for the gen erati on of tran sgenic rats by in vivo manipulation of SSCs with a high success *** in juvenile rats were transduced in vivo with high titers of lentivirus harbori ng enhan ced green fluoresce nt protei n and mated with wild-type females to create foun der *** founder rats expressed the transgene and passed on the transgene with an overall success rate of 50.0%.Subsequent generations of progeny from the founder rats both expressed and passed on the ***,direct modification of SSCs in juvenile rats is an effective means of generating transgenic rats through the male *** technology could be adapted to larger animals,in which existing methods for gene modificatio n are in adequate or in applicable,resulti ng in the gen eration of tran sge nic an imals in a variety of species.

关键词： germline modification lentivirus spermatogonial stem cell testis transgenic animal

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Treatment strategies using adefovir dipivoxil for individuals with lamivudine-resistant chronic hepatitis B

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World Journal of Gastroenterology 2012年第47期18卷 6987-6995页

作者： Tae Jung Yun Jin yong Jung Chang Ha Kim Soon Ho Um Hyonggin An Yeon Seok Seo Jin Dong Kim Hyung Joon Yim Bora Keum yong sik Kim Yoon Tae Jeen Hong sik Lee Hoon Jai Chun Chang Duck Kim Ho Sang Ryu Department of Internal Medicine Korea University College of MedicineSeoul 136-705South Korea Department of Biostatistics Korea University College of MedicineSeoul 136-705South Korea

AIM:To investigate retrospectively the long-term efficacy of various treatment strategies using adefovir dipivoxil(adefovir) in patients with lamivudine-resistant chronic hepatitis ***:We included 154 consecutive patients in two treatment groups:the "add-on" group(n = 79),in which adefovir was added to ongoing lamivudine treatment due to lamivudine resistance,and the "switch/combination" group(n = 75),in which lamivudine was first switched to adefovir and then re-added later as *** "switch/combination" group was then divided into two subgroups depending on whether participants followed(group A,n = 30) or violated(group B,n = 45) a proposed treatment strategy that determined whether to add lamivudine based on the serum hepatitis B virus(HBV) DNA levels(< 60 IU/mL or not) after 6 mo of treatment(roadmap concept).RESULTS:The cumulative probability of virologic response(HBV DNA < 60 IU/mL) was higher in group A than in the "add-on" group and in group B(P < 0.001).In contrast,the cumulative probability of virologic breakthrough was lower in the "add-on" group than in group B(P = 0.002).Furthermore,the risk of virologic breakthrough in the multivariate analysis was significantly lower in the "add-on" group than in group A(hazard ratio = 0.096;95%CI,0.015-0.629;P = 0.015).CONCLUSION:The selective combination of adefovir with lamivudine based upon early treatment responses increased the odds of virologic breakthrough relative to the use of uniform combination therapy from the beginning of treatment.

关键词：阿德福韦酯慢性乙型肝炎联合治疗拉米夫定耐药 DNA水平多变量分析病毒学

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Sensitivity of the suspected blood indicator:An experimental study

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世界胃肠病学杂志：英文版 2012年第31期18卷 4169-4174页

作者： Sung Chul Park Hoon Jai Chun Eun Sun Kim Bora Keum Yeon Seok Seo yong sik Kim Yoon Tae Jeen Hong sik Lee Soon Ho Um Chang Duck Kim Ho Sang Ryu Division of Gastroenterology and Hepatology Department of Internal MedicineKangwon National University School of MedicineChuncheon 200-722South Korea Division of Gastroenterology and Hepatology Department of Internal MedicineKorea University College of MedicineSeoul 136-705South Korea

AIM:To investigate whether suspected blood indicator(SBI) in capsule endoscopy(CE) is affected by background color and capsule passage ***:Experimental models of the small intestine constructed from paper in a variety of colors were used to simulate the background colors observed in CE *** background colors studied included very pale yellow,yellow,very pale magenta,light grayish pink,burnt sienna,and deep and dark brown,and red spots were attached inside *** endoscopic capsule was manually passed through the *** rate of detection of the red spots by the SBI was evaluated based on the colors of the models and the capsule passage velocities(0.5 cm/s,1 cm/s,and 2 cm/s).RESULTS:The rate of detection of the red spots by the SBI differed significantly according to the background color of the model(P < 0.001).Detection rates were highest for backgrounds of very pale magenta,burnt sienna,and yellow,in that *** were lowest for backgrounds of dark brown and very pale *** rate of detection of red spots by the SBI tended to decrease at rapid capsule passage velocities(1-2 cm/s) compared to slow velocities(0.5 cm/s) for backgrounds of very pale yellow(P = 0.042),yellow(P = 0.001),very pale magenta(P = 0.002),and burnt sienna(P = 0.001).No significant differences in the rate of detection were observed according to velocity for light grayish pink(P = 0.643) or dark brown(P = 0.396).CONCLUSION:SBI sensitivity was affected by background color and capsule passage velocity in the *** findings may facilitate the rapid detection of bleeding lesions by CE.

关键词：实验模型血液指标灵敏度通过速度背景颜色 SBI 检测率颜色模型

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Comparison of sequential and 7-,10-,14-d triple therapy for Helicobacter pylori infection

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World Journal of Gastroenterology 2012年第19期18卷 2377-2382页

作者： Hyuk Soon Choi Hoon Jai Chun Sang Hoon Park Bora Keum Yeon Seok Seo yong sik Kim Yoon-Tae Jeen Soon Ho Um Hong sik Lee Chang Duck Kim Ho Sang Ryu Division of Gastroenterology and Hepatology Department of Internal MedicineInstitute of Digestive Disease and NutritionKorea University College of MedicineSeoul 136-705South Korea

AIM:To compare the effectiveness of sequential therapy for Helicobacter pylori(***) infection with that of triple therapy of varying ***:The 460 patients enrolled in this study had ***-associated gastritis or a gastric or duodenal *** screening,***-infected patients were randomly assigned to receive either conventional triple therapy for 7,10 or 14 d,or a new 10-d sequential *** of the 4 treatment groups included 115 *** outcomes of eradication therapy were assessed 4 wk after treatment by the urea breath test and ***:The overall eradication rate was 81.0%,and eradication rates were 75.7% for 7-d conventional triple therapy,81.9% for 10-d conventional triple therapy,84.4% for 14-d conventional triple therapy,and 82.0% for 10-d sequential *** intention-to-treat analysis nor per protocol analysis showed significant differences in eradication rates using sequential therapy or the standard triple therapy(P = 0.416 and P = 0.405,respectively).CONCLUSION:There are no significant differences between 10-d sequential eradication therapy for *** and any duration of standard triple treatment in Korean patients.

关键词：疗法三联感染幽门螺旋杆菌幽门螺杆菌十二指肠协议分析治疗

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Cost-effective screening using a two-antibody panel for detecting mismatch repair deficiency in sporadic colorectal cancer

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World Journal of Clinical Cases 2021年第24期9卷 6999-7008页

作者： Jong Beom Kim Young Il Kim yong sik Yoon Jihun Kim Seo Young Park Jong Lyul Lee Chan Wook Kim In Ja Park Seok-Byung Lim Chang sik Yu Jin Cheon Kim Division of Colon and Rectal Surgery University of Ulsan College of MedicineAsan Medical CenterSeoul 05505South Korea Department of Pathology University of Ulsan College of MedicineAsan Medical CenterSeoul 05505South Korea Department of Clinical Epidemiology and Biostatistics University of Ulsan College of MedicineAsan Medical CenterSeoul 05505South Korea

BACKGROUND The microsatellite instability(MSI)test and immunohistochemistry(IHC)are widely used to screen DNA mismatch repair(MMR)deficiency in sporadic colorectal cancer(CRC).For IHC,a two-antibody panel of MLH1 and MSH2 or four-antibody panel of MLH1,MSH2,PMS2,and MSH6 are *** general,MSI is known as a more accurate screening test than *** To compare two-and four-antibody panels of IHC in terms of accuracy and cost benefit on the basis of MSI testing for detecting MMR *** We retrospectively analyzed patients with CRC who underwent curative surgery between 2015 and 2017 at a tertiary referral *** IHC with four antibodies and MSI tests were routinely *** sensitivity and specificity of a fourand two types of two-antibody panels(PMS2/MSH6 and MLH1/MSH2)were compared on the basis of MSI testing for detecting MMR *** High-frequency MSI was found in 5.5%(n=193)of the patients(n=3486).The sensitivities of the four-and two types of two-antibody panels were 97.4%,92.2%,and 87.6%,*** specificities of the three types of panels did not differ significantly(99.6%for the four-antibody and PMS2/MSH6 panels,99.7%for the MLH1/MSH2 panel).Based on Cohen's kappa statistic(κ),four-and twoantibody panels were in almost perfect agreement with the MSI test(κ>0.9).The costs of the MSI test and the four-and two-antibody panels of IHC were approximately$200,$160,and$80,*** Considering the cost of the four-antibody panel IHC compared to that of the twoantibody panel IHC,a two-antibody panel of PMS2/MSH6 might be the best choice in terms of balancing cost-effectiveness and accuracy.

关键词： Adenocarcinoma DNA mismatch repair Immunochemistry Monoclonal antibody Microsatellite instability Cost-effectiveness

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Risk factors for postoperative recurrence after primary bowel resection in patients with Crohn's disease

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World Journal of Gastroenterology 2017年第38期23卷 7016-7024页

作者： Kwan Mo Yang Chang sik Yu Jong Lyul Lee Chan Wook Kim yong sik Yoon In Ja Park Seok-Byung Lim Sang Hyoung Park Byong Duk Ye Suk-Kyun Yang Jin Cheon Kim Division of Colon and Rectal Surgery Department of Surgery University of Ulsan College of Medicine Asan Medical Center De-partment of Gastroenterology University of Ulsan College of Medicine Asan Medical Center

AIM To evaluate the risk factors for postoperative recurrence after primary bowel resection in a cohort of Korean Crohn's disease(CD) *** This study included 260 patients with no history of previous bowel surgery who underwent primary surgery for CD between January 2000 and December 2010 at Asan Medical Center(Seoul, South Korea). The median follow-up period was 101 *** During the follow-up period, 66 patients(25.4%) underwent a second operation for disease *** 1, 5 and 10 years after the first operation, the cumulative rate of surgical recurrence was 1.1%, 8.3% and 35.9% and clinical recurrence occurred in 1.2%, 23.6% and 68.1%, respectively. In multivariate analysis, undergoing an emergency operation was a significant risk factor for surgical recurrence-free survival(SRFS) [HR = 2.431, 95%CI: 1.394-4.240, P = 0.002], as were the presence of perianal disease after the first operation(HR = 1.715, 95%CI: 1.005-2.926, P = 0.048) and history of smoking(HR = 1.798, 95%CI: 1.088-2.969, P = 0.022). The postoperative use of antitumor necrosis factor(TNF) agents reduced SRFS risk(HR = 0.521, 95%CI: 0.300-0.904, P = 0.02).CONCLUSION History of smoking, postoperative perianal disease and undergoing an emergency operation were independent risk factors for surgical recurrence. Using anti-TNF agents may reduce surgical recurrence.

关键词： Crohns 疾病复发风险因素

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Evaluating the benefit of adjuvant chemotherapy in patients with ypT0-1 rectal cancer treated with preoperative chemoradiotherapy

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World Journal of Gastrointestinal Surgery 2021年第9期13卷 1000-1011页

作者： Ye Won Jeon In Ja Park Jeong Eun Kim Jin-Hong Park Seok-Byung Lim Chan Wook Kim yong sik Yoon Jong Lyul Lee Chang sik Yu Jin Cheon Kim Department of Surgery Asan Medical Center and University of Ulsan College of MedicineSeoul 05505South Korea Department of Colon and Rectal Surgery Asan Medical Center and University of Ulsan College of MedicineSeoul 05505South Korea Department of Oncology Asan Medical Center and University of Ulsan College of MedicineSeoul 05505South Korea Department of Radiation Oncology Asan Medical Center and University of Ulsan College of MedicineSeoul 05505South Korea

BACKGROUND Adjuvant chemotherapy(ACTx)is recommended in rectal cancer patients after preoperative chemoradiotherapy(PCRT),but its efficacy in patients in the early post-surgical stage who have a favorable prognosis is *** To evaluate the long-term survival benefit of ACTx in patients with ypT0–1 rectal cancer after PCRT and surgical *** We identified rectal cancer patients who underwent PCRT followed by surgical resection at the Asan Medical Center from 2005 to *** with ypT0–1 disease and those who received ACTx were *** 5-year overall survival(OS)and 5-year recurrence-free survival(RFS)were analyzed according to the status of the *** Of 520 included patients,413 received ACTx(ACTx group)and 107 did not(no ACTx group).No significant difference was observed in 5-year RFS(ACTx group,87.9%vs no ACTx group,91.4%,P=0.457)and 5-year OS(ACTx group,90.5%vs no ACTx group,86.2%,P=0.304)between the *** stage was associated with RFS and OS in multivariate analysis[hazard ratio(HR):2.57,95%confidence interval(CI):1.07–6.16,P=0.04 and HR:2.27,95%CI:1.09–4.74,P=0.03,respectively].Furthermore,ypN stage was associated with RFS and OS(HR:4.74,95%CI:2.39–9.42,P<0.00 and HR:4.33,95%CI:2.20–8.53,P<0.00,respectively),but only in the radical resection *** Oncological outcomes of patients with ypT0–1 rectal cancer who received ACTx after PCRT showed no improvement,regardless of the radicality of *** trials are needed to evaluate the efficacy of ACTx in these group of patients.

关键词： Rectal neoplasm Adjuvant chemotherapy ypT0-1 Radical resection Local excision

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Chronic liver disease is universal in children with biliary atresia living with native liver

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World Journal of Gastroenterology 2017年第43期23卷 7776-7784页

作者： Way Seah Lee sik yong Ong Hee Wei Foo Shin Yee Wong Chen Xi Kong Ru Bin Seah Ruey Terng Ng Department of Paediatrics University Malaya Medical Centre Paediatrics and Child Health Research Group University Malaya

AIM To examine the medical status of children with biliary atresia(BA) surviving with native *** In this cross-sectional review,data collected included complications of chronic liver disease(CLD)(cholangitis in the preceding 12 mo,portal hypertension,variceal bleeding,fractures,hepatopulmonary syndrome,portopulmonary hypertension) and laboratory indices(white cell and platelet counts,total bilirubin,albumin,international normalized ratio,alanine aminotransferase,aspartate aminotransferase,γ-glutamyl transpeptidase). Ideal medical outcome was defined as absence of clinical evidence of CLD or abnormal laboratory indices. RESULTS Fifty-two children [females = 32,62%; median age 7.4 years,n = 35(67%) older than 5 years] with BA(median age at surgery 60 d,range of 30 to 148 d) survived with native liver. Common complications of CLD noted were portal hypertension(40%,n = 21; 2 younger than 5 years),cholangitis(36%) and bleeding varices(25%,n = 13; 1 younger than 5 years). Fifteen(29%) had no clinical complications of CLD and three(6%) had normal laboratory indices. Ideal medical outcome was only seen in 1 patient(2%). CONCLUSION Clinical or laboratory evidence of CLD are present in 98% of children with BA living with native livers after hepatoportoenterostomy. Portal hypertension and variceal bleeding may be seen in children younger than 5 years of age,underscoring the importance of medical surveillance for complications of BA starting at a young age.

关键词：胆汁的闭锁医药地位长期的肝疾病

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Prostate-specific antigen density predicts favorable pathology and biochemical recurrence in patients with intermediate-risk prostate cancer

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Asian Journal of Andrology 2016年第3期18卷 480-484,I0012页

作者： Ho Won Kang Hae Do Jung Joo yong Lee Jong Kyou Kwon Seong Uk Jeh Kang Su Cho Won sik Ham Young Deuk Choi Department of Urology Chungbuk National University College of Medicine Cheongju Korea Department of Urology Severance Hospital Urological Science InstituteYonsei University College of Medicine Seoul Korea Department of Urology. Inje university Haeundae Paik Hospital Busan Korea Department of Urology Gyeongsang National University School of Medicine Jinju Korea Department of Urology Gangnam Severance Hospital Urological Science Institute Yonsei University Uollege of Medicine Seoul Korea Robot and Minimal Invasive Surgery Center Severance Hospital Yonsei University College of Medicine Seoul Korea.

This study was designed to identify clinical predictors of favorable pathology and biochemical recurrence （BCR） in patients with intermediate-risk prostate cancer （IRPCa）. Between 2006 and 2012, clinicopathological and oncological data from 203 consecutive men undergoing robot-assisted radical prostatectomy （RARP） for IRPCa were reviewed in a single-institutional retrospective study. Favorable pathology was defined as Gleason score 〈6 and organ-confined cancer as detected by surgical pathology. Logistic regression analysis was used to determine predictive variables of favorable pathology, and the Kaplan-Meier and multivariate Cox regression model were used to estimate BCR-free survival after RARP. Overall, 38 patients （18.7%） had favorable pathology after RARP. Lower quartile prostate-specific antigen density （PSAD） was associated with favorable pathology compared to the highest quartile PSAD after adjusting for preoperative PSA, clinical stage and biopsy Gleason score （odds ratio, 5.42; 95% confidence interval, 1.01-28.97; P = 0.048）. During a median 37.8 （interquartile range, 24.6-60.2） months of follow-up, 66 patients experienced BCR. There were significant differences with regard to BCR free survival by PSAD quartiles （log rank, P = 0.003）. Using a multivariable Cox proportion hazard model, PSAD was found to be an independent predictor of BCR in patients with IRPCa after RARP （hazard ratio, 4.641; 95% confidence interval, 1.109-19.417; P = 0.036）. The incorporation of the PSAD into risk assessments might provide additional prognostic information and identify some patients in whom active surveillance would be appropriate in patients with IRPCa.

关键词： biochemical recurrence prostatectomy prostate-specific antigen prostate-specific antigen density prostatic neoplasms

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Randomized controlled trial to evaluate the efficacy and safety of fexuprazan compared with esomeprazole in erosive esophagitis

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World Journal of Gastroenterology 2022年第44期28卷 6294-6309页

作者： Kang Nyeong Lee Oh Young Lee Hoon Jai Chun Jin Il Kim Sung Kook Kim Sang Woo Lee Kyung sik Park Kook Lae Lee Suck Chei Choi Jae-Young Jang Gwang Ha Kim In-kyung Sung Moo In Park Joong Goo Kwon Nayoung Kim Jae Jun Kim Soo Teik Lee Hyun Soo Kim Ki Bae Kim yong Chan Lee Myung-Gyu Choi Joon Seong Lee Hwoon-yong Jung Kwang Jae Lee Jie-Hyun Kim Hyunsoo Chung Department of Internal Medicine Hanyang University College of MedicineSeoul 04763South Korea Department of Internal Medicine Korea University Anam HospitalSeoul 02841South Korea Department of Internal Medicine The Catholic University of KoreaYeouido ST.Mary’s HospitalSeoul 07260South Korea Department of Internal Medicine Kyungpook National University HospitalDaegu 41944South Korea Department of Internal Medicine Korea University Ansan HospitalAnsan-si 15355South Korea Department of Internal Medicine Keimyung University Dongsan HospitalDaegu 42601South Korea Department of Internal Medicine Seoul Metropolitan Government Seoul National University Boramae Medical CenterSeoul 07061South Korea Department of Internal Medicine Wonkwang University HospitalIksan 54538South Korea Department of Internal Medicine KyungHee University Medical CenterSeoul 02447South Korea Department of Internal Medicine Pusan National University School of Medicine and Biomedical Research InstitutePusan National University HospitalBusan 47241South Korea Department of Internal Medicine KKonkuk University Medical CenterSeoul 05030South Korea Department of Internal Medicine Kosin University Gaspel HospitalBusan 49267South Korea Department of Internal Medicine Daegu Catholic University Medical CenterDaegu 42471South Korea Department of Internal Medicine Seoul National University Bundang HospitalSeongnam-si 13620Gyeonggi-doSouth Korea Department of Internal Medicine Samsung Medical CenterSeoul 06351South Korea Department of Internal Medicine Chonbuk National University HospitalJeonju-si 54907South Korea Department of Internal Medicine Chonnam National University HospitalGwangju 61469South Korea Department of Internal medicine Chungbuk National University School of MedicineCheong Ju 28644South Korea Department of Internal Medicine Severance HospitalSeoul 03722South Korea Department of Internal Medicine The Catholic University of KoreaSeoul ST.Mary’s HospitalSeoul 06591South Korea Digestive Disease Center Soon

BACKGROUND Fexuprazan,a novel potassium-competitive acid blocker,reversibly suppresses the K+/H+-ATPase enzyme in proton pumps within gastric parietal ***’s suppression of gastric acid was maintained in healthy individuals for 24 h in a dose-dependent *** To compare fexuprazan to esomeprazole and establish its efficacy and safety in patients with erosive esophagitis(EE).METHODS Korean adult patients with endoscopically confirmed EE were randomized 1:1 to receive fexuprazan 40 mg or esomeprazole 40 mg once daily for eight *** primary endpoint was the proportion of patients with healed EE confirmed by endoscopy at week *** secondary endpoints included the healing rate of EE at week 4,symptom response,and quality of life *** profiles and serum gastrin levels were compared between the *** Of the 263 randomized,218 completed the study per protocol(fexuprazan 40 mg,n=107;esomeprazole 40 mg,n=111).Fexuprazan was non-inferior to esomeprazole regarding the healing rate at week 8[99.1%(106/107)vs 99.1%(110/111)].There were no between-group differences in the EE healing rate at week 4[90.3%(93/103)vs 88.5%(92/104)],symptom responses,and quality of life ***,serum gastrin levels at weeks 4 and 8 and drug-related side effects did not significantly differ between the *** Fexuprazan 40 mg is non-inferior to esomeprazole 40 mg in EE healing at week *** suggest that fexuprazan is an alternative promising treatment option to PPIs for patients with EE.

关键词： Gastroesophageal reflux Esophagitis Proton pump inhibitors Heartburn Quality of life

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