Euphorbia tirucalli Linn. is traditionally used as medicine especially in the treatment of diseases caused by bacterial pathogens. The objectives of the present study were to identify the bioactive compounds in the stem of Euphorbia tirucalli Linn. using the gas chromatography-mass spectrometry (GCMS) analysis, and to investigate their potentials as an alternative for antimicrobial activity. Two-microliters of dried powdered of Euphorbia tirucalli Linn. stem were mixed with methanol followed by injection into splitless mode of GC-MS. Separation was achieved by Elite-5MS fused capillary column. The mass spectra were compared with the spectra of known components stored in the NIST and WILEY databases for compound identification. Forty-six chemical constituents were identified. The major constituents were lanosta-8,24-dien-3-ol, (3β)- (13.60%), (23S)-ethylcholest-5-en-(3β)-ol (7.02%), linoleic acid (2.96%) and viminalol (2.57%). Most of the active compounds present in the stem of Euphorbia tirucalli Linn. have previously been shown to exhibit antimicrobial properties.
Plants, Medicinal ; Medicine, Traditional

Objective: The number of people surviving until old age has been increasing worldwide. Reductions in both fertility and mortality rates, better living standards, nutrition and health care are claimed to be the key factors that increase the proportion of aged people within the population. Nevertheless, growing numbers of older adults also increases the susceptibility to diseases that commonly afflict the elderly, such as dementia. In this article, we discuss on the current issues of dementia in Malaysia and its challenge in providing a better management and services for this population. Methods and Results: Review of literature by searching the databases CINAHL, SCOPUS, MEDLINE and PsychINFO from June 2010 to November 2010 was done on the issues involving dementia patients in Malaysia such as ageing trend, awareness and availability of services. Conclusion: Despite a limited number of studies on dementia in Malaysia, literature revealed the importance of acknowledging the issues and improving the services for the patients. Efforts should be made by the government and private sectors to promote healthy ageing in Malaysia.

Objective: To investigate the prevalence of parental stress and psychological wellbeing among parents with autistic children and their associations with dimensions of support system. Methods: This is a preliminary cross sectional study which randomly selected parents with clinically diagnosed autistic children. Those parents who attended psycho-education session on management of autistic children at Health Psychology Unit were randomly selected to enroll in the study. Psychological wellbeing, parental stress and dimensions of support system were assessed by using the General Health Questionnaire (GHQ-28), the Parenting Stress Index (PSI) and the Provision Social Relation (PSR), respectively. Results: Of 52 parents with autistic children (34 female and 18 male), about 90.4% of parents had significant parenting stress, and 53.8% of parents showed clinical disturbance in psychological wellbeing. Gender (t=1.67, p=0.02) and occupation (F=4.78, p=0.01) showed statistically significant association with psychological wellbeing. No association found between other socio-demographic factors, parental stress and psychological wellbeing with dimensions of support system among parents with autistic children. Conclusion: Parents with autistic children have high prevalence of stress and psychological disturbances. Interactions of various factors need to be acknowledged and considered in order to reduce the burden of parents with autistic children

Objective: To investigate the prevalence of parental stress and psychological wellbeing among parents with autistic children and their associations with dimensions of support system. Methods: This is a preliminary cross sectional study which randomly selected parents with clinically diagnosed autistic children. Those parents who attended psycho-education session on management of autistic children at Health Psychology Unit were randomly selected to enroll in the study. Psychological wellbeing, parental stress and dimensions of support system were assessed by using the General Health Questionnaire (GHQ-28), the Parenting Stress Index (PSI) and the Provision Social Relation (PSR), respectively. Results: Of 52 parents with autistic children (34 female and 18 male), about 90.4% of parents had significant parenting stress, and 53.8% of parents showed clinical disturbance in psychological wellbeing. Gender (t=1.67, p=0.02) and occupation (F=4.78, p=0.01) showed statistically significant association with psychological wellbeing. No association found between other socio-demographic factors, parental stress and psychological wellbeing with dimensions of support system among parents with autistic children. Conclusion: Parents with autistic children have high prevalence of stress and psychological disturbances. Interactions of various factors need to be acknowledged and considered in order to reduce the burden of parents with autistic children.

Mitochondrial DNA (mtDNA) is a hereditary material located in mitochondria and is normally maternally inherited. Mutational analysis performed on mtDNA proved that the mutations are closely related with a number of genetic illnesses, besides being exploitable for forensic identification. Those findings imply the importance of mtDNA in the scientific field. MtDNA can be found in abundance in tooth dentin where it is kept protected by the enamel, the hardest outer part of the tooth. In this study, two techniques of mtDNA extraction were compared to determine the efficacy between the two techniques. Teeth used for the study was collected from Dental Clinic, Hospital Universiti Sains Malaysia. After the removal of tooth from the tooth socket of the patient, the tooth was kept at -20C until use. Later, pulp tissue and enamel was excised using dental bur and only the root dentin was utilized for the isolation of mtDNA by crushing it mechanically into powdered form. MtDNA was extracted using the two published methods, Pfeifer and Budowle and then subjected to spectrophotometry DNA quantification and purity, Polymerase chain reaction (PCR) amplification of hypervariable-two region of mtDNA, followed by DNA sequencing to analyze the reliability of the extraction techniques. In conclusion, both techniques proved to be efficient and capable for the extraction of mtDNA from tooth dentin.

Xeroderma pigmentosum-D (XPD) is one of the genes that play a role in the Nucleotide-Excision Repair (NER). Polymorphisms in XPD gene have been identified and reported to be associated with many types of cancer with two common single nucleotide polymorphisms (SNPs), namely, XPD312 and XPD751. The XPD312 polymorphism is at exon 10 codon 312 Asp to Asn (A→G) and the association of this polymorphism with oral cancer is very little known, especially, in Malaysia. The aim of this study was to screen for XPD312 gene polymorphisms in human oral cancer patients attending Hospital Universiti Sains Malaysia (HUSM), Malaysia. Blood samples were collected from 10 oral cancer and 10 normal healthy subjects with their consent. DNA was extracted using commercial DNA extraction kit and Polymerase Chain Reaction (PCR) was performed to amplify the XPD312 gene. The PCR products were digested using restriction enzyme, Sty I and analyzed on a 3% agarose gel for the detection of polymorphisms. This was followed by DNA sequencing to confirm the findings. In the current study, only homozygous wild type polymorphisms in the XPD312 gene was noticed in the oral cancer tissues as revealed by the restriction enzyme and DNA sequencing analyses.

Mitochondrial DNA (mtDNA) deletions are a major cause of chronic progressive external ophthalmoplegia (CPEO) and Kearns-Sayre syndrome (KSS). We analyzed single mtDNA deletions in 11 CPEO and one KSS patients by means of Southern blot and long polymerase chain reaction (PCR) assays. The deletion sizes ranged from 3.4 kb to 6.9 kb whereas the heteroplasmy level varied from 18.8% to 85.5%. Two unique deletions sized 4320 bp and 4717 bp were found. This study represents the first genetic screen of mtDNA disorders in Malaysia, and it follows the data seen in other published reports on CPEO and KSS genetic aetiology.

A cohort of Malaysian patients with clinico-pathological diagnosis of three specifi c mitochondrial encephalomyopathy syndromes comprising of mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes (MELAS), myoclonus epilepsy with ragged-red fi bers (MERRF) and Leigh syndrome were studied to determine the frequency of their common mitochondrial DNA mutations. The ‘hot-spot’ point mutations for MELAS, MERRF and Leigh syndrome were screened. In the absence of common point mutations, screening of large-scale deletions as well as sequencing of tRNALeu and tRNALys genes were performed. Of 22 patients studied, nine m.3243A>G mutations, four m.8344A>G mutations, one m.8993T>G mutation and one deletion were identifi ed (65% detection rate). While the m.3243A>G mutation was closely associated with MELAS, the m.8344A>G was more heterogenous, being seen in one MERFF, two isolated mitochondrial myopathies and one Leigh syndrome patient. Screening for m.8993T>G in Leigh syndrome has a low yield as unsurprisingly Leigh syndrome has considerable genetic heterogeneity.

This study evaluates the cytotoxic and mutagenic effect of synthetic hydroxyapatite granules (source: School of Material and Mineral Resources Engineering, Universiti Sains Malaysia) in the bone marrow cells of mice. Mice are exposed to synthetic hydroxyapatite granules, the bone marrow cells are collected and observed for chromosome aberrations. No chromosome aberrations were noticed in the animals exposed to distilled water (negative control) and to the test substance, synthetic hydroxyapatite granules (treatment) groups. Chromosome aberrations were observed in the animals exposed to Mitomycin C (positive control group). There was no indication of cytotoxicity due to synthetic hydroxyapatite granules in the animals as revealed by the mitotic index. Hence, synthetic hydroxyapatite granules are considered non-mutagenic under the prevailing test conditions.
Bone Marrow Cells/*drug effects ; Bone Substitutes/*toxicity ; *Chromosome Aberrations ; Durapatite/*toxicity ; *Mutagenicity Tests

The present study is aimed at finding the mutagenicity and cytotoxicity of dense form of synthetic hydroxyapatite (Source: School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia) in the blood of sheep. The biomaterial was implanted in the tibia of Malin, an indigenous sheep breed of Malaysia. Blood was collected from the sheep before implantation of the biomaterial, cultured and a karyological study was made. Six weeks after implantation, blood was collected from the same animal, cultured and screened for chromosome aberrations. The mitotic indices and karyological analysis indicated that the implantation of synthetic hydroxyapatite (dense form) did not produce any cytotoxicity or chromosome aberrations in the blood of sheep.
Biocompatible Materials/*toxicity ; Bone Substitutes/*toxicity ; Bone and Bones/pathology ; Cell Survival/drug effects ; *Chromosome Aberrations ; Hydroxyapatites/*toxicity ; Karyotyping ; *Mutagenicity Tests ; *Prostheses and Implants ; Sheep