Displaying publications 1 - 20 of 41 in total

Abstract:
Sort:
  1. Hng, S.H., Brenda, B.J., Ngu, Z.L.
    Medicine & Health, 2020;15(2):9-16.
    MyJurnal
    Kemahiran pemikiran kritikal adalah satu kemahiran yang penting bagi para jururawat membuat keputusan klinikal yang lebih baik untuk memberi jagarawatan yang selamat. Seseorang mesti mempunyai kecenderungan awal untuk berfikir kritis bagi pembangunan kemahiran pemikiran kritikal. Pembentukan kecenderungan pemikiran kritis disokong oleh harga diri yang mencukupi. Kajian ini bertujuan untuk mengukur tahap kecenderungan pemikiran kritis dan harga diri di kalangan pelajar ijazah sarjana muda kejururawatan di sebuah universiti awam Malaysia. Kajian keratan rentas ini telah dijalankan di universiti melibatkan 99 orang pelajar. Data dikumpul dengan responden menjawab sendiri borang soal selidik. Data yang diperolehi kemudiannya dianalisa secara kuantitatif. Sejumlah 97% pelajar kejururawatan mempunyai tahap yang tinggi untuk mempunyai kecenderungan pemikiran kritis. Hampir 3/4 daripada pelajar kejururawatan mempunyai tahap sederhana bagi tanggapan harga diri (74.7%). Kecenderungan pemikiran kritis didapati signifikan berkait dengan tanggapan harga diri (rho = 0.203, p
    Matched MeSH terms: Glycosaminoglycans
  2. Aniza, I., Syed Mohamed Aljunid, Jamsiah, M.
    MyJurnal
    Skim Sistem Saraan Malaysia (SSM) telah diperkenalkan pada tahun 2002 menggantikan skim Sistem Saraan Baru (SSB) kepada kakitangan sektor awam. Satu kajian keratan rentas telah dijalankan ke atas Pakar Perubatan Kesihatan Awam (PPKA) pada 2004 yang bertujuan untuk mendapatkan persepsi mereka mengenai skim SSM. Semua PPKA yang berdaftar dengan Persatuan Pakar Perubatan Kesihatan Awam (PPPKA) yang berkhidmat dengan Kementerian Kesihatan Malaysia (KKM) dipilih sebagai responden. Kajian ini menggunakan borang soalselidik yang diisi sendiri oleh responden. Kadar respon kajian ini ialah 70.0% iaitu 217 responden. Kajian ini mendapati sebanyak 80.6% PPKA tidak bersetuju dengan pelaksanaan SSM, hanya 7.4% bersetuju dan sebanyak 12.0% berkecuali. Kelemahan-kelemahan utama SSM yang dikenalpasti oleh responden yang tidak bersetuju dengan SSM ialah prosedur atau skim perkhidmatan yang kabur(83.9%), peperiksaan Tahap Kecekapan yang tidak releven (54.1%) dan kenaikan pangkat terjejas (40.5%). Hasil kajian ini dapat membantu pihak-pihak yang terlibat memperbaiki kelemahan-kelemahan SSM supaya pelaksanaannya menjadi lebih mantap dan dapat menangani kelemahan yang wujud di dalam skim tersebut.
    Matched MeSH terms: Glycosaminoglycans
  3. Jamsiah, M., Md Idris, M.N., Sharifa Ezat, W.P., Norfazilah, A.
    MyJurnal
    Satu kajian keratan rentas telah dijalankan ke atas 285 orang penduduk yang berumur 18 tahun dan ke atas di Kg. Bangi Daerah Hulu langat, Selangor D.E. dari 6-12 Mac 2006. Objektif kajian ini adalah untuk melihat prevalens senaman dan faktor yang mempunyai hubungan dengannya. Kaedah persampelan universal telah digunakan dan pengumpulan data melalui borang soalselidik berpandu. Alatan yang digunakan termasuk penimbang berat Seca dan sfigmomanometer yang telah di kalibrasi, stateskop dan pita pengukur ketinggian. Hasil kajian menunjukkan hanya 13.7% daripada responden yang di kaji di dalam kategori cukup bersenam mengikut definisi kajian. Antara faktor-faktor yang mempunyai hubungan yang signifikan dengan prevalens cukup bersenam adalah jantina (p=0.004), tahap pendidikan (p=0.02) dan status perkahwinan (p
    Matched MeSH terms: Glycosaminoglycans
  4. MUMTAZUDDIN AHMED M, MOHIUDDIN A
    Med J Malaya, 1963 Mar;17:199-208.
    PMID: 13936588
    Matched MeSH terms: Glycosaminoglycans*
  5. Masre SF, Yip GW, Sirajudeen KN, Ghazali FC
    Nat Prod Res, 2012;26(7):684-9.
    PMID: 21859370 DOI: 10.1080/14786419.2010.545354
    Stichopus hermanni and Stichopus vastus are sea cucumber species from the Stichopodidae family within the coastal waters of Malaysia. The integument of these invertebrates is hypothesised to contain abundant glycosaminoglycans (GAGs). GAGs are divided into non-sulphated and sulphated GAGs. Sulphated GAGs have various chemico-biological functions that are beneficial to humans. This study quantitatively analysed N-, O-sulphated and total sulphated GAG content from three different anatomical regions (integument, internal organs and coelomic fluid) of S. hermanni and S. vastus. The integument revealed the highest content of total, O- and N-sulphated GAGs, followed by the internal organs and the coelomic fluid for both species of sea cucumbers. The percentage division of O- and N-sulphated GAGs suggested that anatomical parts of both species showed higher levels of O-sulphated GAGs compared to N-sulphated GAGs. In conclusion, these findings indicate that the integument body wall of S. hermanni and S. vastus is a rich source of sulphated GAGs.
    Matched MeSH terms: Glycosaminoglycans/analysis*; Glycosaminoglycans/isolation & purification
  6. Maria Abu Bakar, Azman Jalar, Roslina Ismail
    Sains Malaysiana, 2018;47:805-810.
    Pencerapan dua dimensi (2D) yang diperoleh daripada keratan rentas sampel selalunya digunakan untuk mendapatkan
    maklumat ketebalan lapisan sebatian antara logam (IMC). Walau bagaimanapun, pencerapan 2D amatlah terhad
    berbanding maklumat yang sepatutnya diperoleh daripada struktur tiga dimensi (3D) sampel. Kajian ini bertujuan untuk
    menilai semula kaedah pengukuran lapisan IMC daripada pemerhatian 2D dengan mempertimbangkan faktor-faktor
    sebenar dalam bentuk 3D IMC. Nilai mod ketebalan didapati lebih mewakili nilai ketebalan IMC setelah mempertimbangkan
    pelbagai faktor stereometri berbanding dengan nilai purata. Ini memberikan suatu penanda aras dalam aktiviti
    menentukan ketebalan lapisan IMC berdasarkan pencerapan 2D daripada struktur 3D.
    Matched MeSH terms: Glycosaminoglycans
  7. Norfazilah, A., Hafizah, Z., Siti Zubaidah, Azmawati, M.N.
    Medicine & Health, 2015;10(1):48-57.
    MyJurnal
    Kebelakangan ini, tanda-tanda kemurungan dalam kalangan remaja semakin meningkat. Kajian ini dijalankan untuk menentukan prevalens kemurungan dan faktor-faktor ramalan. Satu kajian keratan rentas telah dijalankan 191 remaja yang terpilih secara rawak dan terdiri daripada pelajar tingkatan empat dari lima buah sekolah menengah di negeri Selangor, Malaysia. Satu soal selidik yang terdiri daripada enam bahagian (A) demografi, (B) tahap kemurungan, (C) hubungan keluarga, (D) tahap sokongan rakan sebaya, (E) harga diri, dan (F) pencapaian akademik telah diedarkan. Prevalen kemurungan adalah 50.3%. Analisis regresi logistik mendapati, remaja yang mempunyai masalah dengan rakan-rakan adalah lebih cenderung untuk mengalami kemurungan berbanding dengan mereka yang tidak mempunyai masalah dengan rakan-rakan mereka (aOR 2.84, 95% CI 1.50, 5.36). Kajian selanjutnya perlu meneliti faktor-faktor lain seperti tekanan daripada guru-guru untuk mengukuhkan pemahaman kita mengenai kemurungan di kalangan remaja. Diharapkan hasil kajian ini berguna kepada pelbagai pihak yang mengambil berat tentang masalah ini.
    Matched MeSH terms: Glycosaminoglycans
  8. Tan CW, Poh CL, Sam IC, Chan YF
    J Virol, 2013 Jan;87(1):611-20.
    PMID: 23097443 DOI: 10.1128/JVI.02226-12
    Enterovirus 71 (EV-71) infections are usually associated with mild hand, foot, and mouth disease in young children but have been reported to cause severe neurological complications with high mortality rates. To date, four EV-71 receptors have been identified, but inhibition of these receptors by antagonists did not completely abolish EV-71 infection, implying that there is an as yet undiscovered receptor(s). Since EV-71 has a wide range of tissue tropisms, we hypothesize that EV-71 infections may be facilitated by using receptors that are widely expressed in all cell types, such as heparan sulfate. In this study, heparin, polysulfated dextran sulfate, and suramin were found to significantly prevent EV-71 infection. Heparin inhibited infection by all the EV-71 strains tested, including those with a single-passage history. Neutralization of the cell surface anionic charge by polycationic poly-d-lysine and blockage of heparan sulfate by an anti-heparan sulfate peptide also inhibited EV-71 infection. Interference with heparan sulfate biosynthesis either by sodium chlorate treatment or through transient knockdown of N-deacetylase/N-sulfotransferase-1 and exostosin-1 expression reduced EV-71 infection in RD cells. Enzymatic removal of cell surface heparan sulfate by heparinase I/II/III inhibited EV-71 infection. Furthermore, the level of EV-71 attachment to CHO cell lines that are variably deficient in cell surface glycosaminoglycans was significantly lower than that to wild-type CHO cells. Direct binding of EV-71 particles to heparin-Sepharose columns under physiological salt conditions was demonstrated. We conclude that EV-71 infection requires initial binding to heparan sulfate as an attachment receptor.
    Matched MeSH terms: Glycosaminoglycans/metabolism*
  9. Omar A, Jalil JA, Shakrin NM, Ngu LH, Yunus ZM
    Data Brief, 2019 Aug;25:104377.
    PMID: 31516928 DOI: 10.1016/j.dib.2019.104377
    This article contains information related to a recent study "Selective screening for detection of mucopolysaccharidoses (MPS) in Malaysia; A Two-year Study" Affandi et al., 2019. Any patient registered under government healthcare facilities in Malaysia and fit at least two inclusion criteria were included in this selective screening. Urine and blood from these high risk patients were obtained and analysed for glycosaminoglycans (GAGs) level before characterization using high resolution electrophoresis (HRE). Thereafter, enzyme assay for different types of MPS based on result of HRE were determined using specific substrate. Demographic data as well as laboratory findings were tabulated and analysed. The data of this study demonstrate between clinical presentation and laboratory findings among high risk patients of MPS and can be employed to improve diagnosis of MPS.
    Matched MeSH terms: Glycosaminoglycans
  10. Nurfariha Firdaus, Ismarulyusda Ishak, Syarif Husin Lubis, Nooraisyah Mansoor, Hidayatul Fathi Othman, Nihayah Mohammad, et al.
    MyJurnal
    Kromium merupakan mineral yang penting dan kofaktor insulin yang memainkan peranan penting sebagai hormon yang membantu dalam regulasi gula dalam darah. Penduduk Kelantan sering dikaitkan dengan pengambilan makanan berasaskan gula. Petani merupakan golongan yang berisiko tinggi kerana pendedahan terhadap pestisid dan pengambilan makanan bergula boleh mempengaruhi paras kromium. Objektif kajian ini adalah untuk mengetahui status paras kromium dalam kalangan petani yang terdedah kepada pestisid dan baja kimia di Kelantan. Kajian ini adalah kajian keratan rentas yang dilakukan di Bachok dan Pasir Puteh, Kelantan. Responden adalah seramai 113 petani yang terdedah kepada pestisid atau baja kimia tidak kurang daripada satu tahun. Subjek ditemu bual menggunakan soal selidik pengetahuan, sikap dan amalan (KAP) yang telah divalidasi untuk informasi berkaitan data demografi k. Sampel kuku dan rambut telah dianalisia dengan menggunakan kaedah pencernaan asid dan Inductively Coupled Plasma Mass Spectroscopy (ICPMS) untuk mendapatkan paras kromium. Hasil kajian menunjukkan 81.4% adalah petani lelaki dan 18.6% adalah perempuan. Paras kromium kuku (125.82 ± 47.81 μg/L) dan rambut (39.63 ± 5.70 μg/L) petani adalah lebih rendah berbanding julat piawai kuku (6200 μg/L) dan rambut (100-2500 μg/L). Tiada perbezaan paras kromium yang signifi kan (p > 0.05) menurut jantina, umur, glukosa darah, tempoh pendedahan pestisid dan pemakanan. Petani yang merokok menunjukkan paras kromium yang lebih rendah (p < 0.05) berbanding petani yang tidak merokok. Kesimpulannya, paras unsur kromium petani di Bachok dan Pasir Puteh adalah rendah berbanding julat normal dan petani harus berhenti merokok kerana merokok akan merendahkan paras kromium.
    Matched MeSH terms: Glycosaminoglycans
  11. Wong, L. K. S., Muthupalaniappen, L., Tie, S. T.
    Medicine & Health, 2017;12(2):275-285.
    MyJurnal
    Adult influenza and pneumococcal vaccinations are grossly underutilized although there is clear benefit in reducing mortality and morbidity among those at risk. The aim of the study was to assess primary care physician’s knowledge on adult influenza and pneumococcal vaccinations, their beliefs and barriers to vaccination. A cross-sectional study using self-administered questionnaires was conducted at eight primary care centres in Kuching, Sarawak. A total of 108 primary care physicians participated in this study. Median age of participants was 29 years (IQR 4.0). The median knowledge score for influenza vaccine was 9 (IQR 3) and for pneumococcal vaccine was 8 (IQR 4). Female participants scored higher compared to their male counterparts for influenza and pneumococcal vaccines (P = 0.005 & 0.007). The highest percentage of correct responses for influenza vaccination was for side effects (75.3%) while the lowest was for contraindications (9.3%). The highest percentage of correct responses for pneumococcal vaccination was for side effects (69.1%) while the lowest was for advocated target groups (6.2%). Most participants believed that pneumococcal and influenza vaccines were safe (92.8 & 99%) and beneficial for patients (89.7 & 93.8%). Cost of influenza and pneumococcal vaccines (94.8% & 96.9%) and their availability (86.6% & 89.7%) were the main barriers to prescribing them. Primary care physicians in the public sector have moderate knowledge of both adult vaccinations. Areas of knowledge paucity and barriers need to be addressed to ensure a more comprehensive health care delivery to the aging Malaysian population.
    Keywords: adult, belief, influenza vaccines, knowledge, pneumococcal vaccines
    Matched MeSH terms: Glycosaminoglycans
  12. Naveen SV, Ahmad RE, Hui WJ, Suhaeb AM, Murali MR, Shanmugam R, et al.
    Int J Med Sci, 2014;11(1):97-105.
    PMID: 24396291 DOI: 10.7150/ijms.6964
    Monosodium -iodoacetate (MIA)-induced animal model of osteoarthritis (OA) is under-utilised despite having many inherent advantages. At present, there is lack of studies that directly compare the degenerative changes induced by MIA with the surgical osteoarthritis induction method and human osteoarthritis, which would further verify a greater use of this model. Therefore, we compared the histological, biochemical and biomechanical characteristics in rat model using MIA against the anterior cruciate ligament transection (ACLT) and human cartilage with clinically established osteoarthritis. The right knees of Sprague-Dawley rats were subjected to either MIA or ACLT (n=18 in each group). Six rats were used as controls. Human cartilage samples were collected and compared from patients clinically diagnosed with (n=7) and without osteoarthritis (n=3). Histological, biochemical (Glycosaminoglycans/total protein) and biomechanical (cartilage stiffness) evaluations were performed at the end of the 1(st) and 2(nd) week after OA induction. For human samples, evaluations were performed at the time of sampling. Histopathological changes in the MIA group were comparable to that observed in the ACLT group and human OA. The Mankin scores of the 3 groups were comparable (MIA: 11.5 ± 1.0; ACLT: 10.1 ± 1.1; human OA: 13.2 ± 0.8). Comparable reduction in Glycosaminoglycan/total protein content in the intervention groups were observed (MIA: 7 ± 0.6; ACLT: 6.6 ± 0.5; human OA: 3.1 ± 0.7). Cartilage stiffness score were 24.2 ± 15.3 Mpa for MIA, 25.3 ± 4.8 for ACLT and 0.5 ± 0.0 Mpa for human OA. The MIA model produces comparable degenerative changes to ACLT and human OA with the advantage of being rapid, minimally invasive and reproducible. Therefore, wider utilisation of MIA as animal translational OA model should perhaps be advocated.
    Matched MeSH terms: Glycosaminoglycans/metabolism*
  13. Krishnamurithy G, Shilpa PN, Ahmad RE, Sulaiman S, Ng CL, Kamarul T
    J Biomed Mater Res A, 2011 Dec 01;99(3):500-6.
    PMID: 21913317 DOI: 10.1002/jbm.a.33184
    Human amniotic membrane (HAM) is an established biomaterial used in many clinical applications. However, its use for tissue engineering purposes has not been fully realized. A study was therefore conducted to evaluate the feasibility of using HAM as a chondrocyte substrate/carrier. HAMs were obtained from fresh human placenta and were process to produced air dried HAM (AdHAM) and freeze dried HAM (FdHAM). Rabbit chondrocytes were isolated and expanded in vitro and seeded onto these preparations. Cell proliferation, GAG expression and GAG/cell expression were measured at days 3, 6, 9, 12, 15, 21, and 28. These were compared to chondrocytes seeded onto plastic surfaces. Histological analysis and scanning electron microscopy was performed to observe cell attachment. There was significantly higher cell proliferation rates observed between AdHAM (13-51%, P=0.001) or FdHAM (18-48%, p = 0.001) to chondrocytes in monolayer. Similarly, GAG and GAG/cell expressed in AdHAM (33-82%, p = 0.001; 22-60%, p = 0.001) or FdHAM (41-81%, p = 0.001: 28-60%, p = 0.001) were significantly higher than monolayer cultures. However, no significant differences were observed in the proliferation rates (p = 0.576), GAG expression (p = 0.476) and GAG/cell expression (p = 0.135) between AdHAM and FdHAM. The histology and scanning electron microscopy assessments demonstrates good chondrocyte attachments on both HAMs. In conclusion, both AdHAM and FdHAM provide superior chondrocyte proliferation, GAG expression, and attachment than monolayer cultures making it a potential substrate/carrier for cell based cartilage therapy and transplantation.
    Matched MeSH terms: Glycosaminoglycans/metabolism
  14. Nor A, Zabedah MY, Norsiah MD, Ngu LH, Suhaila AR
    Malays J Pathol, 2010 Jun;32(1):35-42.
    PMID: 20614724
    Mucopolysaccharidoses (MPS) are a group of inherited disorders caused by the deficiency of specific lysosomal enzymes involved in glycosaminoglycans (GAGs) degradation. Currently, there are 11 enzyme deficiencies resulting in seven distinct MPS clinical syndromes and their subtypes. Different MPS syndromes cannot be clearly distinguished clinically due to overlapping signs and symptoms. Measurement of GAGs content in urine and separation of GAGs using high-resolution electrophoresis (HRE) are very useful initial screening tests for isotyping of MPS before specific enzyme diagnostics. In this study, we measured total urinary GAGs by a method using dimethylmethylene blue (DMB), and followed by isolation and separation of GAGs using high resolution electrophoresis (HRE) technique. Of 760 urine samples analyzed, 40 have abnormal GAGs HRE patterns. Thirty-five of these 40 cases have elevated urinary GAGs levels as well. These abnormal HRE patterns could be classified into 4 patterns: Pattern A (elevated DS and HS; suggestive of MPS I, II or VII; 16 cases), Pattern B (elevated HS and CS; suggestive of MPS III; 17 cases), and Pattern C (elevated KS and CS; suggestive of MPS IV, 5 cases), and Pattern D (elevated DS; suggestive of MPS VI; 2 cases). Based on the GAGs HRE pattern and a few discriminating clinical signs, we performed selective enzymatic investigation in 16 cases. In all except one case with MPS VII, the enzymatic diagnosis correlated well with the provisional MPS type as suggested by the abnormal HRE pattern. Our results showed that GAGs HRE is a useful, inexpensive and practical first-line screening test when MPS is suspected clinically, and it provides an important guide to further enzymatic studies on a selective basis.
    Matched MeSH terms: Glycosaminoglycans/urine*
  15. Kamarul T, Selvaratnam L, Masjuddin T, Ab-Rahim S, Ng C, Chan KY, et al.
    J Orthop Surg (Hong Kong), 2008 Aug;16(2):230-6.
    PMID: 18725678
    To compare the efficacy of autologous chondrocyte transplantation (ACT) versus non-operative measures for cartilage repair in rabbits.
    Matched MeSH terms: Glycosaminoglycans/metabolism
  16. Jamil K, Chua KH, Joudi S, Ng SL, Yahaya NH
    J Orthop Surg Res, 2015;10:27.
    PMID: 25889942 DOI: 10.1186/s13018-015-0166-z
    Functional tissue engineering has emerged as a potential means for treatment of cartilage defect. Development of a stable cartilage composite is considered to be a good option. The aim of the study was to observe whether the incorporation of cultured chondrocytes on porous tantalum utilizing fibrin as a cell carrier would promote cartilage tissue formation.
    Matched MeSH terms: Glycosaminoglycans/metabolism
  17. Yusof F, Sha'ban M, Azhim A
    Int J Nanomedicine, 2019;14:5491-5502.
    PMID: 31410000 DOI: 10.2147/IJN.S207270
    PURPOSE: Meniscus is a fibrocartilagenous tissue that cannot effectively heal due to its complex structure and presence of avascular zone. Thus, tissue engineering and regenerative medicine offer an alternative for the regeneration of meniscus tissues using bioscaffolds as a replacement for the damaged one. The aim of this study was to prepare an ideal meniscus bioscaffold with minimal adverse effect on extracellular matrix components (ECMs) using a sonication treatment system.

    METHODS: The decellularization was achieved using a developed closed sonication treatment system for 10 hrs, and continued with a washing process for 5 days. For the control, a simple immersion treatment was set as a benchmark to compare the decellularization efficiency. Histological and biochemical assays were conducted to investigate the cell removal and retention of the vital extracellular matrix. Surface ultrastructure of the prepared scaffolds was evaluated using scanning electron microscope at 5,000× magnification viewed from cross and longitudinal sections. In addition, the biomechanical properties were investigated through ball indentation testing to study the stiffness, residual forces and compression characteristics. Statistical significance between the samples was determined with p-value =0.05.

    RESULTS: Histological and biochemical assays confirmed the elimination of antigenic cellular components with the retention of the vital extracellular matrix within the sonicated scaffolds. However, there was a significant removal of sulfated glycosaminoglycans. The surface histoarchitecture portrayed the preserved collagen fibril orientation and arrangement. However, there were minor disruptions on the structure, with few empty micropores formed which represented cell lacunae. The biomechanical properties of bioscaffolds showed the retention of viscoelastic behavior of the scaffolds which mimic native tissues. After immersion treatment, those scaffolds had poor results compared to the sonicated scaffolds due to the inefficiency of the treatment.

    CONCLUSION: In conclusion, this study reported that the closed sonication treatment system had high capabilities to prepare ideal bioscaffolds with excellent removal of cellular components, and retained extracellular matrix and biomechanical properties.

    Matched MeSH terms: Glycosaminoglycans/metabolism
  18. Pingguan-Murphy B, Nawi I
    Clinics (Sao Paulo), 2012 Aug;67(8):939-44.
    PMID: 22948463
    OBJECTIVES: The promotion of extracellular matrix synthesis by chondrocytes is a requisite part of an effective cartilage tissue engineering strategy. The aim of this in vitro study was to determine the effect of bi-axial cyclic mechanical loading on cell proliferation and the synthesis of glycosaminoglycans by chondrocytes in three-dimensional cultures.

    METHOD: A strain comprising 10% direct compression and 1% compressive shear was applied to bovine chondrocytes seeded in an agarose gel during two 12-hour conditioning periods separated by a 12-hour resting period.

    RESULTS: The bi-axial-loaded chondrocytes demonstrated a significant increase in glycosaminoglycan synthesis compared with samples exposed to uni-axial or no loading over the same period (p<0.05). The use of a free-swelling recovery period prior to the loading regime resulted in additional glycosaminoglycan production and a significant increase in DNA content (p<0.05), indicating cell proliferation.

    CONCLUSIONS: These results demonstrate that the use of a bi-axial loading regime results in increased matrix production compared with uni-axial loading.

    Matched MeSH terms: Glycosaminoglycans/biosynthesis*
  19. Dashtdar H, Murali MR, Selvaratnam L, Balaji Raghavendran H, Suhaeb AM, Ahmad TS, et al.
    PeerJ, 2016;4:e1650.
    PMID: 26966647 DOI: 10.7717/peerj.1650
    Chondrogenic differentiation of mesenchymal stromal cells (MSCs) in the form of pellet culture and encapsulation in alginate beads has been widely used as conventional model for in vitro chondrogenesis. However, comparative characterization between differentiation, hypertrophic markers, cell adhesion molecule and ultrastructural changes during alginate and pellet culture has not been described. Hence, the present study was conducted comparing MSCs cultured in pellet and alginate beads with monolayer culture. qPCR was performed to assess the expression of chondrogenic, hypertrophic, and cell adhesion molecule genes, whereas transmission electron microscopy (TEM) was used to assess the ultrastructural changes. In addition, immunocytochemistry for Collagen type II and aggrecan and glycosaminoglycan (GAG) analysis were performed. Our results indicate that pellet and alginate bead cultures were necessary for chondrogenic differentiation of MSC. It also indicates that cultures using alginate bead demonstrated significantly higher (p < 0.05) chondrogenic but lower hypertrophic (p < 0.05) gene expressions as compared with pellet cultures. N-cadherin and N-CAM1 expression were up-regulated in second and third weeks of culture and were comparable between the alginate bead and pellet culture groups, respectively. TEM images demonstrated ultrastructural changes resembling cell death in pellet cultures. Our results indicate that using alginate beads, MSCs express higher chondrogenic but lower hypertrophic gene expression. Enhanced production of extracellular matrix and cell adhesion molecules was also observed in this group. These findings suggest that alginate bead culture may serve as a superior chondrogenic model, whereas pellet culture is more appropriate as a hypertrophic model of chondrogenesis.
    Matched MeSH terms: Glycosaminoglycans
  20. Tay LX, Ahmad RE, Dashtdar H, Tay KW, Masjuddin T, Ab-Rahim S, et al.
    Am J Sports Med, 2012 Jan;40(1):83-90.
    PMID: 21917609 DOI: 10.1177/0363546511420819
    Mesenchymal stem cells (MSCs) represent a promising alternative form of cell-based therapy for cartilage injury. However, the capacity of MSCs for chondrogenesis has not been fully explored. In particular, there is presently a lack of studies comparing the effectiveness of MSCs to conventional autologous chondrocyte (autoC) treatment for regeneration of full-thickness cartilage defects in vivo.
    Matched MeSH terms: Glycosaminoglycans/metabolism
Filters
Contact Us

Please provide feedback to Administrator (afdal@afpm.org.my)

External Links