MyMedR

Displaying all 4 publications

Abstract:

Sort:

A comparison of headache and non-headache sufferers on measures of social support and mental health problems

Teoh H, Tam C

Malays Fam Physician, 2008;3(2):82-6.
PMID: 25606122 MyJurnal

138 headaches sufferers and 138 subjects without headaches were studied to investigate if there were differences between headache and non-headache sufferers in terms of their mental health and social support levels. The overall results of this study indicated that headache sufferers, as compared with non-headache sufferers had slightly more mental health problems, and more social support from their family members. When the results were scrutinised in more detail, it was observed that headache sufferers reported that they felt less capable of making decisions about things, were not always able to face up to their problems, and sometimes thought about themselves as a worthless. Given that the study was based on a community, rather than clinic sample, further research would be required to examine the differing the types of headaches that people are suffering from, and the intensity of the headaches, in relation to mental health problems.
Reprogramming human dermal fibroblast into induced pluripotent stem cells using nonintegrative Sendai virus for transduction

Tai L, Teoh HK, Cheong SK

Malays J Pathol, 2018 Dec;40(3):325-329.
PMID: 30580364

INTRODUCTION: Induced pluripotent stem cells (iPSC) that exhibit embryonic stem cell-like properties with unlimited self-renewal and multilineage differentiation properties, are a potential cell source in regenerative medicine and cell-based therapy. Although retroviral and lentiviral transduction methods to generate iPSC are well established, the risk of mutagenesis limits the use of these products for therapeutic applications.
MATERIALS AND METHODS: In this study, reprogramming of human dermal fibroblasts (NHDF) into iPSC was carried out using non-integrative Sendai virus for transduction. The iPSC clones were characterised based on the morphological changes, gene expression of pluripotency markers, and spontaneous and directed differentiation abilities into cells of different germ layers.
RESULTS: On day 18-25 post-transduction, colonies with embryonic stem cell-like morphology were obtained. The iPSC generated were free of Sendai genome and transgene after passage 10, as confirmed by RT-PCR. NHDF-derived iPSC expressed multiple pluripotency markers in qRT-PCR and immunofluorescence staining. When cultured in suspension for 8 days, iPSC successfully formed embryoid body-like spheres. NHDF-derived iPSC also demonstrated the ability to undergo directed differentiation into ectoderm and endoderm.
CONCLUSION: NHDF were successfully reprogrammed into iPSC using non-integrating Sendai virus for transduction.
Fulltext Student learning disability experiences, training and services needs of secondary school teachers

Teoh HJ, Cheong SK, Woo PJ

Malaysian Journal of Psychiatry, 2008;17(2):1-14.
MyJurnal

107 secondary school teachers were surveyed to find out about their observations of children with learning disorders at schools. The respondents reported that the most commonly observed disorders involved difficulty paying attention, difficulty learning a second language, being fidgety and having difficulty sitting still, and having poor comprehension. They also indicated that whilst some children made fun of their classmates with learning disorder, others tried to assist their classmates. The most common reaction of parents was to send the child for lots of tuition, and to be very frustrated with the child. In addition, some parents neglected their children’s learning disorder, and many did not seem to realise how serious the problem was. When it came to the needs of teachers, the most common need that the teachers reported was to have the parents cooperate with them and to have support from the education authorities. The paper discusses the implications of these findings and proposes suggestions for dealing with the training needs of teachers working in the area of learning disorders.
Genetically engineered human umbilical cord-derived mesenchymal stem cells expressing human interleukin-12 and in vitro growth inhibition against lung adenocarcinoma cells

Goh JJ, Ong HT, Lee BS, Teoh HK

Malays J Pathol, 2023 Aug;45(2):247-259.
PMID: 37658534

INTRODUCTION: Mesenchymal stromal cells (MSCs) are promising vehicles for cancer therapy due to their homing ability and potency to be genetically manipulated through either viral or non-viral methods. Interleukin-12 (IL-12) is one of the key immunomodulatory cytokines which has anti-tumour effect. However, systemic administration of the cytokine at therapeutic dosage can cause serious toxicity in the host system due to the high systemic level of interferon-γ (IFN-γ) induced.
OBJECTIVES: This study aimed to investigate the in vitro growth inhibition of genetically engineered human umbilical cord-derived mesenchymal stromal cells (hUCMSC) expressing IL-12 on H1975 human lung adenocarcinoma cells.
MATERIALS AND METHODS: Both adenoviral method and electroporation which used to generate hUCMSC-IL12 were compared. The method with better outcome was selected to generate hUCMSC-IL12 for the co-culture experiment with H1975 or MRC-5 cells. Characterisation of hUCMSC and hUCMSC-IL12 was performed.
RESULTS: Adenoviral method showed superior results in transfection efficiency (63.6%), post-transfection cell viability (82.6%) and hIL-12 protein expression (1.2 x 107 pg/ml) and thus was selected for the downstream experiments. Subsequently, hUCMSC-IL12 showed significant inhibition effect on H1975 cells after 5 days of co-culture. No significant difference was observed for all other co-culture groups, indicating that the inhibition effect was because of hIL-12. Lastly, the integrity of hUCMSC-IL12 remained unaffected by the transduction through examination of their surface markers and differentiation properties.
CONCLUSION: This study provided proof of concept that hUCMSC can be genetically engineered to express hIL-12 which exerts direct growth inhibition effect on human lung adenocarcinoma cells.