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Are human dental papilla-derived stem cell and human brain-derived neural stem cell transplantations suitable for treatment of Parkinson’s disease?

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Neural Regeneration Research 2013年第13期8卷 1190-1200页

作者： Hyung Ho Yoon Joongkee Min nari shin Yong Hwan Kim Jin-Mo Kim Yu-Shik Hwang Jun-Kyo Francis Suh Onyou Hwang Sang Ryong Jeon Department of Neurological Surgery Asan Medical Center University of Ulsan College of Medicine Department of Biochemistry and Molecular Biology University of Ulsan College of Medicine Department of Computer Science and Engineering University of Notre Dame Notre Dame Center for Bionics of Korea Institute of Science and Technology Department of Maxillofacial Biomedical Engineering Institute of Oral Biology School of Dentistry Kyung Hee University

Transplantation of neural stem cells has been reported as a possible approach for replacing impaired dopaminergic neurons. In this study, we tested the efficacy of early-stage human dental papilla-derived stem cells and human brain-derived neural stem cells in rat models of 6-hydroxydopamine-induced Parkinson＇s disease. Rats received a unilateral injection of 6-hydroxydopamine into right medial forebrain bundle, followed 3 weeks later by injections of PBS, early-stage human dental papilla-derived stem cells, or human brain-derived neural stem cells into the ipsilateral striatum. All of the rats in the human dental papilla-derived stem cell group died from tumor formation at around 2 weeks following cell transplantation. Postmortem examinations revealed homogeneous malignant tumors in the striatum of the human dental papilla-derived stem cell group. Stepping tests revealed that human brain-derived neural stem cell transplantation did not improve motor dysfunction. In apomorphine-induced rotation tests, neither the human brain-derived neural stem cell group nor the control groups （PBS injection） demonstrated significant changes. Glucose metabolism in the lesioned side of striatum was reduced by human brain-derived neural stem cell transplantation. [18F]-FP-CIT PET scans in the striatum did not demonstrate a significant increase in the human brain-derived neural stem cell group. Tyrosine hydroxylase （dopaminergic neuronal marker） staining and G protein-activated inward rectifier potassium channel 2 （A9 dopaminergic neuronal marker） were positive in the lesioned side of striatum in the human brain-derived neural stem cell group. The use of early-stage human dental papilla-derived stern cells confirmed its tendency to form tumors. Human brain-derived neural stem cells could be partially differentiated into dopaminergic neurons, but they did not secrete dopamine.

关键词： neural regeneration stern cells cell transplantation glucose metabolism human brain-derivedneural stem cells human dental papilla-derived stem cells Parkinson's disease positron emissiontomography grants-supported paper neuroregeneration

Clinical outcomes of small cell neuroendocrine carcinoma and adenocarcinoma of the gallbladder

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World Journal of Gastroenterology 2015年第1期21卷 269-275页

作者： Sung Pil Yun nari shin Hyung Il Seo Department of Surgery Biomedical Research InstitutePusan National University HospitalBusan 602-739South Korea Department of Pathology Biomedical Research InstitutePusan National University HospitalBusan 602-739South Korea

AIM: To compare the demographics and survival rates between gallbladder adenocarcinoma(GB-adenocarcinoma) and small cell neuroendocrine carcinoma of the gallbladder(GB-NEC-SCC).METHODS: From March 2007 to September 2012,patients who underwent resection of tumor stage T2/T3 GB cancer were enrolled for this *** patients were included in this study,including 38 diagnosed with GB-adenocarcinoma and four diagnosed with *** the GB-adenocarcinoma group,a radical operation was performed in 28 patients,and ten patients underwent simple *** the GB-NEC-SCC group,a radical operation was performed in three patients,and one patient underwent simple *** analysis of the two groups was performed,including clinicopathologic features and survival ***: The median age of the patients was 68 y(range: 35-83 years) and females comprised 26/42 of the ***-adenocarcinoma patients were significantly older than GB-NEC-SCC patients(67.89 ± 11.15 vs 55.75 ± 10.31 years; P = 0.029).The median tumor size in GB-adenocarcinoma patients was 2.56 ± 1.75 cm and 3.98 ± 3.74 cm in GB-NEC-SCC patients; however,there was no significant difference between the two *** tumors > 2 cm,T stage(T2 vs T3),lymphovascular invasion,perineural invasion,lymph node metastasis and lymph node ratio showed no significant differences between the two *** overall survival rate of the 42 patients at five years was 77.0%.In the GB-adenocarcinoma group,the overall five-year survival rate was 74.8%,and survival in the GB-NEC-SCC group was 100%,which was not significantly different between the two ***: The strategy for treating patients with GB-NEC-SCC should be similar to that used for treating GB-adenocarcinoma,including radical cholecystectomy and liver resection.

关键词： Gallbladder adenocarcinoma Gallbladder cancer Radi

Unveiling lymph node metastasis in early gastric cancer

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World Journal of Gastroenterology 2014年第18期20卷 5389-5395页

作者： nari shin Tae-Yong Jeon Gwang Ha Kim Do Youn Park Department of Pathology Pusan National University Hospital and Pusan National University School of MedicineBusan 602-739South Korea Biomedical Research Institute Pusan National University HospitalBusan 602-739South Korea Departments of Surgery Pusan National University Hospital and Pusan National University School of MedicineBusan 602-739South Korea Departments of Gastroenterology Pusan National University Hospital and Pusan National University School of MedicineBusan 602-739South Korea

With respect to gastric cancer treatment,improvements in endoscopic techniques and novel therapeutic modalities[such as endoscopic mucosal resection(EMR)and endoscopic submucosal dissection(ESD)]have been ***,EMR/ESD procedures are widely accepted treatment modalities for early gastric cancer(EGC).These procedures are most widely accepted in Asia,including in Korea and *** the present era of endoscopic resection,accurate prediction of lymph node(LN)metastasis is a critical component of selecting suitable patients for EMR/***,indications for EMR/ESD are based on large Japanese datasets,which indicate that there is almost no risk of LN metastasis in the subgroup of EGC ***,there is some controversy among investigators regarding the validity of these ***,there are currently no accurate methods to predict LN metastasis in gastric cancer(for example,radiologic methods or methods based on molecular biomarkers).We recommend the use of a 2-step method for the management of early gastric cancer using endoscopic *** first step is the selection of suitable patients for endoscopic resection,based on endoscopic and histopathologic *** endoscopic resection,additional surgical intervention could be determined on the basis of a comprehensive review of the endoscopic mucosal resection/endoscopic submucosal dissection specimen,including lymphovascular tumor emboli,tumor size,histologic type,and depth of ***,evaluation of clinical application data is essential for validating this ***,gastroenterologists,surgeons,and pathologists should closely collaborate and communicate during these decisionmaking processes.

关键词： Early gastric cancer Endoscopic submucosal dissect

Cardiac mucosa at the gastroesophageal junction:An Eastern perspective

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World Journal of Gastroenterology 2015年第30期21卷 9126-9133页

作者： Ahrong Kim Won-Young Park nari shin Hyun Jung Lee Young Keum Kim So Jeong Lee Cheong-Soo Hwang Do Youn Park Gwang Ha Kim Bong Eun Lee Hong-Jae Jo Department of Pathology Bio Medical Research InstitutePusan National University Hospital Pusan National University School of Medicine Department of Internal Medicine Bio Medical Research InstitutePusan National University Hospital Department of Surgery Pusan National University Hospital

AIM:To investigate the nature and origin of cardiac mucosa(CM).METHODS:Biopsy samples from sixty-one individuals were included in this study. The specimens were taken "at","just below",or "just above" the gastroesophageal junction,including the histologic squamocolumnar junction. Clinical data were obtained by reviewing electronic medical records for each patient. Patients with a history of stomach adenoma or carcinoma and esophageal carcinoma were excluded,and cases that were endoscopically suspicious of Barrett's esophagus or a polyp were also ruled out. Histologic and endoscopic reviews were performed blinded to the patient's clinical data. Histologic evaluation wasconducted by two pathologists,and endoscopic review was performed by a endoscopist with wide experience in the field. Histologically,the columnar epithelium of squamocolumnar junction,presence and severity of acute and chronic inflammation,atrophy,intestinal metaplasia,and presence of carditis were evaluated. Endoscopically,reflux esophagitis was evaluated by Los Angeles(LA) classification,hiatal hernias were classified by Hill grade,and gastroesophageal flap valves were assessed. RESULTS:Fifty-nine of the 61(96.7%) patients were Korean; 65.6%(40/61) of the patients underwent endoscopy according to the schedule of the National Health Insurance Program as a screening inspection. Of these,only 20.0%(8/40) of cases had reflux s y m p t o m s. C M w a s p r e s e n t i n 4 1 / 6 1( 6 7. 2 %) individuals,and its presence was associated with older age compared to oxyntocardiac mucosa/oxyntic mucosa(60.59 ± 2.02 years vs 51.55 ± 3.35 years; P = 0.018). The presence of CM was associated with endoscopic diagnosis of esophagitis according to the LA classification(P = 0.022). CM was associated with mononuclear cell infiltration and neutrophilic infiltration,which were statistically significant(P = 0.001,and P = 0.004,respectively). The inflammation of CM,"carditis",showed a statistically significant association w

关键词： Cardiac mucosa Carditis Gastroesophagealjunction Gastroesophageal reflux disease Histopathology