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Chua Kien Hui,Wan Kamarul Zaman Wan Safwani,Seah Shiao Chin,Annisaa Abu Samah Abdul Malek,Noormazita Hassan,Muhamad Syakeer Fazil,Raja Abdul Wafy Raja Muhammad Rooshdi,Adila A. Hamid,Somasundaram Sath 한국생물공학회 2012 Biotechnology and Bioprocess Engineering Vol.17 No.6
Recently human adipose-derived stem cells (ASCs) have shown much therapeutic potential in regenerative medicine. However, fetal bovine serum (FBS)used in culturing human cells may give risk to viral and prion transmission as well as immune rejection. Human serum (HS) is a safer growth supplement in human cell culture but its effects have not been well established. Therefore the objectives of this study were to compare the effects of HS versus FBS on the proliferation and stemness gene expression of ASCs. ASCs were cultured for 5passages in medium supplemented with either 10% HS or 10% FBS. ASCs proliferation rate and viability were determined at every passage. Total RNA was extracted at passage 5 (P5) and quantitative PCR was carried out to determine the stemness gene expression level of SOX-2,Nanog3, BST-1, REX-1, ABCG2 and FGF-4. The results showed ASC cultured in 10% HS scored greater proliferation rates and viability compared to 10% FBS. ASCs proliferated significantly faster in 10% HS compared to 10% FBS at P2, P3, and P4 (p < 0.05). In quantitative gene expression analysis, ASCs cultured in 10% FBS showed a significant increase of BST-1, REX-1 and ABCG2 expression compared to 10% HS. In conclusion, HS promotes ASCs proliferation and viability but its ability to support the stemness property of ASCs was inferior to FBS.
Sacrificing Vernacular Cosmopolitanism for the Postcolonial Nation
Chua Beng Huat 연세대학교 영어영문학과 BK21 Plus 사업단 2020 Situations: Cultural Studies in the Asian Context Vol.13 No.1
Colonized territories tended to be populated by voluntary or involuntary immigrants, including convicts and indentured labour, self-motivated individuals in search of economic opportunities and, of course, small bands of colonial administrators. The multi-ethnic and multicultural composition was conducive to the cultural development of what could be called a “vernacular cosmopolitanism,” i.e. an understanding and acceptance of cultural differences derived from mundane, routine social interactions across ethnic-cultural boundaries in everyday life. As the migrants saw the colonized space exclusively in instrumental economic terms and their stay in this space as temporary, they developed scant affective investment for it. It was only after decolonization and the establishment of the new nation that the colonized space was transformed into a place for affective investment by the migrants turned citizen-subjects. And yet the dismantling and replacement of the colonial social order by a national political order often resulted in the marginalization of non-indigenous peoples long settled in the new nation. With few exceptions, in most postcolonial Asian nation-states, these conditions still prevail.
Chua Wei De Kenneth 대한청각학회 2021 Journal of Audiology & Otology Vol.25 No.1
Background and Objectives: In 2013, the Singapore government reviewed and expanded the Senior Mobility Fund (SMF) to provide subsidy for assistive devices, including hearing aids (HA). While SMF has improved accessibility to HA, its impact on HA acquisition has not been determined. The study aims to elucidate the influence of SMF on HA acquisition and the relationship between financial funding and compliance to HA use.Subjects and Methods: Retrospective review of 643 patients seen between January 2017 to January 2018 at the earnose and throat specialist outpatient clinic, who were referred for a hearing aid evaluation. Of the 643 patients, 109 patients with baseline hearing handicap (HH) scores recorded, and no formal diagnosis of cognitive impairment were included. The patients were grouped according to SMF eligibility and clinical data were obtained.Results: The odds ratio for acquiring HA was significantly higher with SMF, regardless of HH scores. When looking at actual degree of hearing loss (DHL), HA uptake was significantly higher in the least severe of DHL categories. There is no relationship between SMF and compliance to HA use. However, HH score is positively correlated with data log in regression analyses.Conclusions: SMF appears to influence HA acquisition. Especially in financially funded patients with low self-perceived HH, the benefits of HA may be underappreciated given the few hours of HA use. Further studies are warranted to investigate the impact of financial funding on outcomes of HA users to help policy planners and clinicians be prudent in the utilization of SMF.