Displaying publications 1 - 20 of 70 in total

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  1. Amar SN, Kamaludin M, Azlina AA, K V Zainuddin MR, Sulaiman KI
    Heliyon, 2024 Mar 30;10(6):e27981.
    PMID: 38524591 DOI: 10.1016/j.heliyon.2024.e27981
    Malaysia needs to fully utilize its renewable energy resources to meet its goal of installed capacity of 31% of renewable energy in 2025 and 40% in 2035. In order to empower renewable energy sources, the government has established a fund known as the renewable energy fund (RE FUND). In Malaysia, most manufacturing sectors contribute to the RE FUND through their monthly electricity bills due to their electricity consumption exceeding 300kwh per month. As Malaysia's highest electricity consumer, the manufacturing sector needs government investment incentives to switch to renewable energy sources to generate electricity. Therefore, this study was conducted to identify attribute preferences of the manufacturing sector due to investing in renewable energy sources. The Choice Experiment method was employed where the Mixed Logit model was chosen to identify the willingness to pay for the manufacturing sectors based on their preferences among the four attributes: types of renewable energy, project location, annual reduction in GHG emissions, and RE FUND. The study results found that the manufacturing sector places the highest value on the project location, where they prefer to improve the project location from current condition to far location. This study can also help to achieve the Goal 7 in the Sustainable Development Goal (SDG), where investment in renewable energy sources can guarantee that all individuals obtain affordable, reliable, sustainable, and modern electricity in 2030.
  2. Boo NY, Nor Azlina AA, Rohana J
    Singapore Med J, 2008 Mar;49(3):204-8.
    PMID: 18363001
    This study was designed to determine the sensitivity and specificity of a semi-quantitative procalcitonin (PCT) test kit for the diagnosis of neonatal sepsis.
  3. Maisalihah Zamzuri, Aliza Haslinda Hamirudin, Norain Zainudin, Suriati Sidek, Nor Azlina A. Rahman
    MyJurnal
    Introduction: Dietary calcium intake is important in body system regulation. Inadequate intake
    among elderly may lead to various health issues such as osteoporosis and hip fracture. In order to counter the problem, this study was carried out to identify dietary calcium intake among elderly in Kuantan, Pahang. Methods: A face to face interviewer-administered session was done individually with seventy-nine (n=79) subjects aged ≥60 years to collect data on sociodemographic background, health status and dietary intake. Diet history method was used to obtain information related to dietary intake and analyzed using Nutritionist Pro Software. P-value was set at p
  4. Hisham AN, Azlina AF, Aina EN, Sarojah A
    Eur J Surg, 2001 Jun;167(6):403-5.
    PMID: 11471662 DOI: 10.1080/110241501750243725
    OBJECTIVE: To review our experience of total thyroidectomy for bilateral multinodular goitre.
    DESIGN: Prospective open study.
    SETTING: Teaching hospital, Malaysia.
    SUBJECTS: 98 consecutive patients whose bilateral multinodular goitres were treated by total thyroidectomy, January 1998-November 1999.
    INTERVENTION: A revised technique of total thyroidectomy in which more attention than is customary was paid to the exposure and safety of the laryngeal nerves and the parathyroid glands. All patients had at least 1 parathyroid gland autotransplanted.
    MAIN OUTCOME MEASURES: Morbidity and mortality
    RESULTS: There were no injuries to the recurrent laryngeal nerves and no patient developed persistent hypocalcaemia; 27/98 developed transient hypocalcaemia, but this had settled by 6 months postoperatively. 59 patients had persistent symptoms of pressure preoperatively, and these all resolved by 3 months postoperatively. 6 patients had occult malignant disease discovered on histological examination, and 3 developed minor wound infections.
    CONCLUSIONS: Total thyroidectomy is the procedure of choice for bilateral multinodular goitres, provided that sufficient attention is paid to the preservation of the laryngeal nerves and the parathyroid glands.
  5. Lee JK, Abbas AA, Cheah TE, Simanjuntak RN, Sockalingam S, Roohi S
    J Orthop Res, 2023 Sep;41(9):1916-1924.
    PMID: 36924071 DOI: 10.1002/jor.25549
    Osteoarthritis (OA) contributes to significant medical and socioeconomic burden in many populations. Its prevalence is expected to rise continuously owing to the combined effects of aging and increase in risk factors, including obesity, physical inactivity, and joint injuries. Pain is a hallmark presentation of OA. Topical nonsteroidal anti-inflammatory drugs (NSAIDs) are recommended by many international guidelines as an early treatment option of the management of osteoarthritic pain. However, the use of topical NSAIDs remains low in Malaysia and appears not to be a preferred agent in managing OA pain by prescribers. There is also limited guidance from local medical bodies on the use of topical NSAIDs to manage OA pain. This consensus recommendation is intended to serve as a practical guide for healthcare practitioners on the use of topical NSAIDs in the management of OA pain. Eight statements and recommendations were finalized covering the areas of OA burden, topical NSAIDs formulations, safety and efficacy of topical NSAIDs, and patient education. Robust evidence is available to support the efficacy and safety of topical NSAIDs, with its benefits further strengthened by ease of use and access. Taking these into consideration, we recommend that healthcare practitioners advocate for the early use of topical NSAIDs over oral NSAIDs for mild-to-moderate OA pain, while engaging in a shared decision-making process with patients for optimal clinical outcomes.
  6. Charan J, Dutta S, Kaur R, Bhardwaj P, Sharma P, Ambwani S, et al.
    Expert Opin Drug Saf, 2021 Sep;20(9):1125-1136.
    PMID: 34162299 DOI: 10.1080/14740338.2021.1946513
    BACKGROUND: Elevated inflammatory cytokines in Coronavirus disease 2019 (COVID-19) affect the lungs leading to pneumonitis with a poor prognosis. Tocilizumab, a type of humanized monoclonal antibody antagonizing interleukin-6 receptors, is currently utilized to treat COVID-19. The present study reviews tocilizumab adverse drug events (ADEs) reported in the World Health Organization (WHO) pharmacovigilance database.

    RESEARCH DESIGN AND METHODS: All suspected ADEs associated with tocilizumab between April to August 2020 were analyzed based on COVID-19 patients' demographic and clinical variables, and severity of involvement of organ system.

    RESULTS: A total of 1005 ADEs were reported among 513 recipients. The majority of the ADEs (46.26%) were reported from 18-64 years, were males and reported spontaneously. Around 80%, 20%, and 64% were serious, fatal, and administered intravenously, respectively. 'Injury, Poisoning, and Procedural Complications' remain as highest (35%) among categorized ADEs. Neutropenia, hypofibrinogenemia were common hematological ADEs. The above 64 years was found to have significantly lower odds than of below 45 years. In comparison, those in the European Region have substantially higher odds compared to the Region of Americas.

    CONCLUSION: Neutropenia, superinfections, reactivation of latent infections, hepatitis, and cardiac abnormalities were common ADEs observed that necessitate proper monitoring and reporting.

  7. Ho JPY, Merican AM, Hashim MS, Abbas AA, Chan CK, Mohamad JA
    J Arthroplasty, 2017 10;32(10):3176-3183.
    PMID: 28579444 DOI: 10.1016/j.arth.2017.04.060
    BACKGROUND: The posterior tibial slope (PTS) is an important consideration in knee arthroplasty. However, there is still no consensus for the optimal slope. The objectives of this study were (1) to reliably determine the native PTS in this population using 3-dimensional computed tomography scans and (2) to determine the normal reference range for PTS in this population.

    METHODS: One hundred computed tomography scans of disease-free knees were analyzed. A 3-dimensional reconstructed image of the tibia was generated and aligned to its anatomic axis in the coronal and sagittal planes. The tibia was then rotationally aligned to the tibial plateau (tibial centroid axis) and PTS was measured from best-fit planes on the surface of the proximal tibia and individually for the medial and lateral plateaus. This was then repeated with the tibia rotationally aligned to the ankle (transmalleolar axis).

    RESULTS: When rotationally aligned to the tibial plateau, the mean PTS, medial PTS, and lateral PTS were 11.2° ± 3.0 (range, 4.7°-17.7°), 11.3° ± 3.2 (range, 2.7°-19.7°), and 10.9° ± 3.7 (range, 3.5°-19.4°), respectively. When rotationally aligned to the ankle, the mean PTS, medial PTS, and lateral PTS were 11.4° ± 3.0 (range, 5.3°-19.3°), 13.9° ± 3.7 (range, 3.1°-24.4°), and 9.7° ± 3.6 (range, 0.8°-17.7°), respectively.

    CONCLUSION: The PTS in the normal Asian knee is on average 11° (mean) with a reference range of 5°-17° (mean ± 2 standard deviation). This has implications to surgery and implant design.

  8. Nasir NF, Kannan TP, Sulaiman SA, Shamsuddin S, Azlina A, Stangaciu S
    Age (Dordr), 2015 Jun;37(3):9797.
    PMID: 26028466 DOI: 10.1007/s11357-015-9797-6
    The belief that beekeepers live longer than anyone else is present since ages. However, no research has been done to explore the longevity of life in beekeepers. Here, we investigated the telomere length in 30 male beekeepers and 30 male non-beekeepers and associated them with the longevity of life using Southern analysis of terminal restriction fragments (TRFs) generated by Hinf I/Rsa I digestion of human genomic DNA using TeloTAGGG Telomere Length Assay. Interestingly, we found that the telomere length of male beekeepers was significantly longer than those of male non-beekeepers with a p value of less than 0.05, suggesting that beekeepers may have longer life compared to non-beekeepers. We further found that the consumption of bee products for a long period and frequent consumption of bee products per day are associated with telomere length. An increase of year in consuming bee products is associated with a mean increase in telomere length of 0.258 kbp. In addition, an increase in frequency of eating bee products per day was also associated with a mean increase of 2.66 kbp in telomere length. These results suggested that bee products might play some roles in telomere length maintenance.
  9. Yi, Q.S., Wan Zarina, Z.A., Nurulhidayah, C.N., Mohamad Ezany, Y., Azlina, A., Suharni, M.
    Medicine & Health, 2017;12(1):34-41.
    MyJurnal
    Euphorbia tirucalli dilaporkan mempunyai aktiviti antibakteria terhadap pelbagai
    mikroorganisma. Kajian in vitro ini bertujuan untuk menilai ciri-ciri antibakteria
    ekstrak (metanol, etanol dan ekstrak akueus) batang Euphorbia tirucalli terhadap
    bakteria yang berkaitan dengan karies gigi, iaitu Streptococcus mutans (S. mutans)
    dan Streptococcus sobrinus (S. sobrinus). Sifat-sifat antibakteria telah ditentukan
    menggunakan ujian resapan agar berlubang pada kepekatan ekstrak yang berbeza
    (10, 20 dan 30 mg/ml). Komersial amoxicillin (10 µg) telah digunakan sebagai
    kawalan positif manakala pelarut yang sesuai telah digunakan sebagai kawalan
    negatif. Ekstrak metanol dan ethanol daripada batang Euphorbia tirucalli didapati
    berkesan terhadap S. mutans dan S. sobrinus. Walau bagaimanapun, ekstrak akueus
    batang Euphorbia tirucalli tidak menunjukkan aktiviti terhadap kedua-dua strain
    bakteria. Perbezaan dalam ciri-ciri antibakteria dalam perbezaan ekstrak Euphorbia
    tirucalli mungkin disebabkan oleh perbezaan dalam juzuk fitokimia.
  10. Ahmad A, Yassin WM, Rahman NAA, Leman WI, Rosla L, Paul M, et al.
    Malays J Med Sci, 2021 Feb;28(1):66-74.
    PMID: 33679222 DOI: 10.21315/mjms2021.28.1.9
    Background: Nasopharyngeal carcinoma (NPC) is the fifth most common cancer among Malaysians. While several studies have reported the trend of NPC in other states in Malaysia, no studies have reported the trend of NPC in Pahang state. This study was designed to report the number and distribution of newly diagnosed NPC cases in Pahang.

    Methods: NPC cases that were diagnosed between 2012 and 2017 in two referral hospitals in Pahang were traced. The crude incidence rate (CR) and age-standardised rate (ASR) were calculated to investigate the NPC incidence.

    Results: There were 143 new cases of NPC reported from the two hospitals. The mean age at diagnosis was 52.0 ± 13.7 years old. The majority of cases involved males (74.1%) with a male to female ratio of 2.9:1. Chinese males were found to have the highest incidence with a mean ASR of 4.7 per 100,000 population. Overall, the mean ASR for Pahang was 2.4 per 100,000 population for males and 0.9 per 100,000 population for females.

    Conclusion: The total number of NPC cases reveals an increasing trend from 2012 to 2014 and then a slightly decreasing trend from 2015 to 2017. The incidence of NPC in Pahang was intermediate in males and low in females.

  11. Wu Y, Yang Z, Law JB, He AY, Abbas AA, Denslin V, et al.
    Tissue Eng Part A, 2017 01;23(1-2):43-54.
    PMID: 27824280 DOI: 10.1089/ten.TEA.2016.0123
    Stem cell differentiation is guided by contact with the physical microenvironment, influence by both topography and mechanical properties of the matrix. In this study, the combined effect of substratum nano-topography and mechanical stiffness in directing mesenchymal stem cell (MSC) chondrogenesis was investigated. Three polyesters of varying stiffness were thermally imprinted to create nano-grating or pillar patterns of the same dimension. The surface of the nano-patterned substrate was coated with chondroitin sulfate (CS) to provide an even surface chemistry, with cell-adhesive and chondro-inductive properties, across all polymeric substrates. The surface characteristic, mechanical modulus, and degradation of the CS-coated patterned polymeric substrates were analyzed. The cell morphology adopted on the nano-topographic surfaces were accounted by F-actin distribution, and correlated to the cell proliferation and chondrogenic differentiation outcomes. Results show that substratum stiffness and topographical cues affected MSC morphology and aggregation, and influenced the phenotypic development at the earlier stage of chondrogenic differentiation. Hyaline-like cartilage with middle/deep zone cartilage characteristics was generated on softer pillar surface, while on stiffer nano-pillar material MSCs showed potential to generate constituents of hyaline/fibro/hypertrophic cartilage. Fibro/superficial zone-like cartilage could be derived from nano-grating of softer stiffness, while stiffer nano-grating resulted in insignificant chondrogenesis. This study demonstrates the possibility of refining the phenotype of cartilage generated from MSCs by manipulating surface topography and material stiffness.
  12. Kasiram MZ, Hapidin H, Abdullah H, Hashim NM, Azlina A, Sulong S
    Pharmacol Rep, 2022 Feb;74(1):175-188.
    PMID: 34652600 DOI: 10.1007/s43440-021-00330-3
    BACKGROUND: The increase in cases of chemoresistance of cisplatin for osteosarcoma treatment has called for the need to establish a new treatment regime. Tannic acid (TA) possesses a potent antiproliferative effect against various cancers. Therefore, this study investigated the effect of TA combined with cisplatin on human osteosarcoma cell lines (U2OS).

    METHODS: MTT assay was used to determine the half-maximal inhibitory concentration (IC50), while the combination index (CI) value was utilized to analyze the interaction within each combination. The antiproliferative effect of the treatment was evaluated by trypan blue exclusion assay. The morphological changes of cells were observed under a phase-contrast inverted microscope. The nuclear morphology and percentage of apoptosis cells were evaluated by using the Hoechst 33258 staining and annexin V/PI assay, respectively.

    RESULTS: The U2OS cells showed cytotoxic effect when treated with TA and cisplatin, with IC50 at 4.47 µg/mL and 16.25 µg/mL, respectively. The TA demonstrated no significant inhibition effect on the normal human fetal osteoblast cells (hFOB 1.19); yet, interestingly, a potent proliferative effect was indicated. Synergistic interaction was triggered when TA was combined with cisplatin at percentage ratios of 90:10 and 85:15. Meanwhile, antagonistic interaction was induced in the combination at percentage ratios of 75:25 and 50:50. On the other hand, a significant antiproliferative effect with prominent morphological alteration was detected in the cells treated with a combination of TA and cisplatin at the percentage ratio of 90:10. Additionally, combination-treated cells demonstrated the highest percentage of apoptosis cells, with distinct chromosomal condensation, nuclear fragmentation, reduction of nuclear volume, and notable apoptotic body.

    CONCLUSION: Therefore, there is a high potential for the inclusion of TA in the cisplatin-based chemotherapeutic regimen of osteosarcoma.

  13. Haque M, Islam T, Rahman NAA, McKimm J, Abdullah A, Dhingra S
    Risk Manag Healthc Policy, 2020;13:409-426.
    PMID: 32547272 DOI: 10.2147/RMHP.S239074
    The prevalence of long-term (chronic) non-communicable diseases (NCDs) is increasing globally due to an ageing global population, urbanization, changes in lifestyles, and inequitable access to healthcare. Although previously more common in high- and upper-middle-income countries, lower-middle-income countries (LMICs) are more affected, with NCDs in LMICs currently accounting for 85-90% of premature deaths among 30-69 years old. NCDs have both high morbidity and mortality and high treatment costs, not only for the diseases themselves but also for their complications. Primary health care (PHC) services are a vital component in the prevention and control of long-term NCDs, particularly in LMICs, where the health infrastructure and hospital services may be under strain. Drawing from published studies, this review analyses how PHC services can be utilized and strengthened to help prevent and control long-term NCDs in LMICs. The review finds that a PHC service approach, which deals with health in a comprehensive way, including the promotion, prevention, and control of diseases, can be useful in both high and low resource settings. Further, a PHC based approach also provides opportunities for communities to better access appropriate healthcare, which ensures more significant equity, efficiency, effectiveness, safety, and timeliness, empowers service users, and helps healthcare providers to achieve better health outcomes at lower costs.
  14. Haque M, Rahman NAA, McKimm J, Kibria GM, Azim Majumder MA, Haque SZ, et al.
    Infect Drug Resist, 2019;12:1333-1351.
    PMID: 31190922 DOI: 10.2147/IDR.S203364
    Background: Self-medication of drugs to alleviate symptoms is a common global behavior, helping relieve burdens on health services, but many drugs eg, antibiotics are prescription-only. Self-medication of antibiotics (SMA) is an irrational use of drugs, contributing to microbial resistance increasing health care costs and higher mortality and morbidity. This study aimed to assess SMA among university students. Methods: This was a cross-sectional study conducted among medical and non-medical students of the National Defence University of Malaysia. A validated instrument was used to gather data. Ethics approval was obtained. Random and universal sampling was adopted, and SPSS 21 was used for data analysis. Results: A total of 649 students participated in the study: 48.5% male and 51.5% female, 39.3% reported self-medicating with antibiotics. Penicillin, doxycycline, clarithromycin were the antibiotics most used with the majority reporting no adverse drug reactions. Cost savings and convenience were the principal reasons for SMA which were mainly obtained from local retail pharmacies. Despite medical students (particularly the more senior) having better knowledge of antibiotic use than non-medical students, 89% of all research participants responded that practicing SMA was a good/acceptable practice. Conclusion: SMA is common amongst Malaysian students and, despite understanding why SMA is unwise, even medical students self-medicate.
  15. Atif S, Abdul Wahab N, Ghafoor S, Azlina A, Tauseef A, Rana S, et al.
    PLoS One, 2023;18(4):e0283995.
    PMID: 37027451 DOI: 10.1371/journal.pone.0283995
    Xerostomia is a subjective condition of dryness of the oral cavity that may lead to several oral problems deteriorating oral health-related quality of life. This study aimed to (1) determine the prevalence of xerostomia, (2) compare the general health status, unstimulated salivary flow rate, and oral health-related quality of life in xerostomics and non-xerostomics, and (3) investigate the potential of salivary aquaporin-3 (AQP-3) as a screening biomarker for xerostomia in patients with periodontal disease. Demographics and systemic health data were collected from 109 healthy participants, 20 to 55 years old, with Community Periodontal Index (CPI) score ≥ 3. For subjective assessment of xerostomia, Shortened Xerostomia Inventory (SXI) was used. For objective assessment of xerostomia, unstimulated salivary flow rate was measured. Shortened Oral Health Impact Profile (S-OHIP) was utilized for oral health-related quality of life assessment. The collected saliva samples were processed and stored at -80°C. Quantification of salivary AQP-3 protein was done with enzyme-linked immunosorbent assay. Xerostomia was reported in 78% of the subjects based on SXI score. Median concentration of AQP-3 was significantly higher in xerostomics compared to non-xerostomics, p = 0.001. Moreover, oral health-related quality of life was significantly poor in xerostomics compared to non-xerostomics, p = 0.002. Furthermore, there were significant correlations between AQP-3 and SXI (r = 0.21, p = 0.025), AQP-3 and S-OHIP (r = 0.2, p = 0.042), S-OHIP and SXI (r = 0.37, p < 0.001), unstimulated salivary flow rate and random blood glucose level (r = 0.32, p = 0.001), and body mass index and mean arterial pressure (r = 0.44, p < 0.001). Regression analysis showed that body mass index, CPI score 3, and salivary AQP-3 were suitable predictors for presence of xerostomia. AQP-3 could be a potential screening biomarker for xerostomia in patients with periodontal disease for its early identification may help improve oral health-related quality of life of the individuals.
  16. Palafox B, Seguin ML, McKee M, Dans AL, Yusoff K, Candari CJ, et al.
    BMJ Open, 2018 07 30;8(7):e024000.
    PMID: 30061449 DOI: 10.1136/bmjopen-2018-024000
    INTRODUCTION: Hypertension is a leading contributor to the global burden of disease. While safe and effective treatment exists, blood pressure control is poor in many countries, often reflecting barriers at the levels of health systems and services as well as at the broader level of patients' sociocultural contexts. This study examines how these interact to facilitate or hinder hypertension control, taking into account characteristics of service provision components and social contexts.

    METHODS AND ANALYSIS: The study, set in Malaysia and the Philippines, builds on two systematic reviews of barriers to effective hypertension management. People with hypertension (pre-existing and newly diagnosed) will be identified in poor households in 24-30 communities per country. Quantitative and qualitative methods will be used to examine their experiences of and pathways into seeking and obtaining care. These include two waves of household surveys of 20-25 participants per community 12-18 months apart, microcosting exercises to assess the cost of illness (including costs due to health seeking activities and inability to work (5 per community)), preliminary and follow-up in-depth interviews and digital diaries with hypertensive adults over the course of a year (40 per country, employing an innovative mobile phone technology), focus group discussions with study participants and structured assessments of health facilities (including formal and informal providers).

    ETHICS AND DISSEMINATION: Ethical approval has been granted by the Observational Research Ethics Committee at the London School of Hygiene and Tropical Medicine and the Research Ethics Boards at the Universiti Putra Malaysia and the University of the Philippines Manila. The project team will disseminate findings and engage with a wide range of stakeholders to promote uptake and impact. Alongside publications in high-impact journals, dissemination activities include a comprehensive stakeholder analysis, engagement with traditional and social media and 'digital stories' coproduced with research participants.

  17. Muhammad Zubir Yusof, Nik Ahmad Kamal Nik Mahmod, Nor Azlina A. Rahman, Ailin Razali, Niza Samsuddin, Nik Mohamed Nizan Nik Mohamed, et al.
    MyJurnal
    Occupational diseases are one of the major health problems related to workplace hazards.
    However, the epidemiological data for this problem is scarce especially among Small and
    Medium Industry (SMI) workers. These workers are vulnerable to occupational health problem
    due to lack of knowledge and implementation of health and safety in the workplace. In Malaysia,
    most of the SMI workers have limited coverage for basic occupational health services which
    may worsen their health. Thus, this article aims to provide a review on the burden of
    occupational health problems among them. The electronic and library searches were used to
    extract the information from both published and unpublished articles that were not limited to any
    year of publication until 2017. One hundred and ninety-six published articles and 198
    unpublished articles were retrieved from the database. Only 19 published articles and 25
    unpublished articles met the eligibility criteria. Prevalence data of occupational
    diseases/poisoning, including overall and body specific (musculoskeletal disorders) was
    extracted in raw data from the eligible studies. Prevalent statistics on occupational
    musculoskeletal diseases (1.3% - 97.6%), noise-induced hearing loss (29.4% - 73.3%),
    occupational skin diseases (10.5% - 84.3%), respiratory (1.9% - 92.2%) and occupational
    poisoning (14.9% - 17.7%) among the working population is different within published papers
    compared to unpublished ones. In Malaysia, there are no specific statistic that give a true picture
    of the burden of occupational diseases in the SMI. However, this review concludes that
    musculoskeletal diseases are significant occupational problems among SMI workers.
  18. Samuel S, Ahmad RE, Ramasamy TS, Karunanithi P, Naveen SV, Murali MR, et al.
    PeerJ, 2016;4:e2347.
    PMID: 27651984 DOI: 10.7717/peerj.2347
    Previous studies have shown that platelet concentrates used in conjunction with appropriate growth media enhance osteogenic differentiation of human mesenchymal stromal cells (hMSCs). However, their potential in inducing osteogenesis of hMSCs when cultured in serum free medium has not been explored. Furthermore, the resulting osteogenic molecular signatures of the hMSCs have not been compared to standard osteogenic medium. We studied the effect of infrequent supplementation (8-day interval) of 15% non-activated platelet-rich concentrate (PRC) in serum free medium on hMSCs proliferation and differentiation throughout a course of 24 days, and compared the effect with those cultured in a standard osteogenic medium (OM). Cell proliferation was analyzed by alamar blue assay. Gene expression of osteogenic markers (Runx2, Collagen1, Alkaline Phosphatase, Bone morphogenetic protein 2, Osteopontin, Osteocalcin, Osteonectin) were analyzed using Q-PCR. Immunocytochemical staining for osteocalcin, osteopontin and transcription factor Runx2 were done at 8, 16 and 24 days. Biochemical assays for the expression of ALP and osteocalcin were also performed at these time-points. Osteogenic differentiation was further confirmed qualitatively by Alizarin Red S staining that was quantified using cetylpyridinium chloride. Results showed that PRC supplemented in serum free medium enhanced hMSC proliferation, which peaked at day 16. The temporal pattern of gene expression of hMSCs under the influence of PRC was comparable to that of the osteogenic media, but at a greater extent at specific time points. Immunocytochemical staining revealed stronger staining for Runx2 in the PRC-treated group compared to OM, while the staining for Osteocalcin and Osteopontin were comparable in both groups. ALP activity and Osteocalcin/DNA level were higher in the PRC group. Cells in the PRC group had similar level of bone mineralization as those cultured in OM, as reflected by the intensity of Alizarin red stain. Collectively, these results demonstrate a great potential of PRC alone in inducing proliferation of hMSCs without any influence from other lineage-specific growth media. PRC alone has similar capacity to enhance hMSC osteogenic differentiation as a standard OM, without changing the temporal profile of the differentiation process. Thus, PRC could be used as a substitute medium to provide sufficient pool of pre-differentiated hMSCs for potential clinical application in bone regeneration.
  19. Shah-Majid M, Azlina AM, Ana Maria AR, Zaharah B, Norhaliza AH
    Vet Rec, 2004 Nov 20;155(21):680-1.
    PMID: 15581146
  20. Yap YH, Tan N, Fung S, Aziz AA, Tan C, Ng S
    J Sci Food Agric, 2013 Sep;93(12):2945-52.
    PMID: 23460242 DOI: 10.1002/jsfa.6121
    Lignosus rhinocerus (tiger milk mushroom) is an important medicinal mushroom used in Southeast Asia and China, and its sclerotium can be developed into functional food/nutraceuticals. The nutrient composition, antioxidant properties, and anti-proliferative activity of wild type and a cultivated strain of L. rhinocerus sclerotia were investigated.
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