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Open-Access Journal
Editorial
Interplay among cellular polarization, lipoprotein metabolism and hepatitis C virus entry 
Ignacio Benedicto, Francisca Molina-Jiménez, Ricardo Moreno-Otero, Manuel López-Cabrera, Pedro L Majano 
World J Gastroenterol 17(22):2683-2690. Published online Jun 14, 2011. doi: 10.3748/wjg.v17.i22.2683
Topic Highlight
Inflammatory bowel disease in adolescents: What problems does it pose? 
Ying Lu, James Markowitz 
World J Gastroenterol 17(22):2691-2695. Published online Jun 14, 2011. doi: 10.3748/wjg.v17.i22.2691
Inflammatory bowel disease in pregnancy 
Dawn B Beaulieu, Sunanda Kane 
World J Gastroenterol 17(22):2696-2701. Published online Jun 14, 2011. doi: 10.3748/wjg.v17.i22.2696
Extraintestinal manifestations of inflammatory bowel disease: Do they influence treatment and outcome? 
Fernando Tavarela Veloso 
World J Gastroenterol 17(22):2702-2707. Published online Jun 14, 2011. doi: 10.3748/wjg.v17.i22.2702
Inflammatory bowel disease in travelers: Choosing the right vaccines and check-ups 
Maria Esteve, Carme Loras, Ester García-Planella 
World J Gastroenterol 17(22):2708-2714. Published online Jun 14, 2011. doi: 10.3748/wjg.v17.i22.2708
Familial aggregation in inflammatory bowel disease: Is it genes or environment? 
Tiago Nunes, Gionata Fiorino, Silvio Danese, Miquel Sans 
World J Gastroenterol 17(22):2715-2722. Published online Jun 14, 2011. doi: 10.3748/wjg.v17.i22.2715
Comorbidity in inflammatory bowel disease 
Antonio López San Román, Fernando Muñoz 
World J Gastroenterol 17(22):2723-2733. Published online Jun 14, 2011. doi: 10.3748/wjg.v17.i22.2723
Old-age inflammatory bowel disease onset: A different problem? 
Joaquin Hinojosa del Val 
World J Gastroenterol 17(22):2734-2739. Published online Jun 14, 2011. doi: 10.3748/wjg.v17.i22.2734
Ulcerative colitis in smokers, non-smokers and ex-smokers 
Guillermo Bastida, Belén Beltrán 
World J Gastroenterol 17(22):2740-2747. Published online Jun 14, 2011. doi: 10.3748/wjg.v17.i22.2740
Original Article
miRNA studies in in vitro and in vivo activated hepatic stellate cells 
Gunter Maubach, Michelle Chin Chia Lim, Jinmiao Chen, Henry Yang, Lang Zhuo 
World J Gastroenterol 17(22):2748-2773. Published online Jun 14, 2011. doi: 10.3748/wjg.v17.i22.2748
Influence of chitosan nanofiber scaffold on porcine endogenous retroviral expression and infectivity in pig hepatocytes 
Bing Han, Xiao-Lei Shi, Jiang-Qiang Xiao, Yue Zhang, Xue-Hui Chu, Jin-Yang Gu, Jia-Jun Tan, Zhong-Ze Gu, Yi-Tao Ding 
World J Gastroenterol 17(22):2774-2780. Published online Jun 14, 2011. doi: 10.3748/wjg.v17.i22.2774