[ABSTRAK
Glioma adalah tumor otak primer yang sampai saat ini sering timbul resistensiterapi. Sel punca glioma diduga berperan penting dalam resistensi dan rekurensisel tumor. Sel punca glioma memiliki penanda permukaan CD133 dan mampuberpluripotensi dengan mengekspresikan Oct4. Kondisi hipoksia tumor jugaberperan dalam self renewal sel punca glioma. Tujuan dari penelitian ini adalahuntuk mengetahui hubungan keberadaan sel punca glioma dengan keganasan,pluripotensi dan kondisi hipoksia. Cross sectional digunakan sebagai desainpenelitian dengan jumlah sampel sebanyak 35 jaringan, terdiri atas 15 gliomaderajat keganasan tinggi dan 20 glioma derajat keganasan rendah. Pengukuranekspresi relatif mRNA CD133, Oct4 dan HIF-1α menggunakan metode qRTPCR.Protein HIF-1α dilihat ekspresinya melalui teknik imunohistokimia.Ekspresi relatif mRNA CD133 dan Oct4 lebih tinggi bermakna (p < 0.05, Mann-Whitney) pada glioma derajat keganasan tinggi dibanding glioma derajatkeganasan rendah. Protein HIF-1α lebih tinggi bermakna (p < 0,01, Mann-Whitney) pada glioma derajat keganasan tinggi dibanding glioma derajatkeganasan rendah. Terdapat hubungan ekspresi sel punca glioma CD133 denganpluripotensi serta kondisi hipoksia (r = 0,518, r = 0,339; Spearman?s rho) sertapluripotensi dengan kondisi hipoksia pada derajat keganasan tinggi (r = 0,749;Spearman?s rho). Ekspresi relatif mRNA CD133, Oct4 dan HIF-1α meningkatseiring dengan peningkatan derajat keganasan. Terdapat hubungan yang bermaknaantara keberadaan penanda sel punca glioma CD133 dengan pluripotensi dankondisi hipoksia pada glioma derajat keganasan tinggi.
ABSTRACT
Glioma is primary brain tumor with frequent therapeutic resistance. Gliomacancer stem cells were considered to play a role in resistance and recurrence oftumor cells. Glioma cancer stem cells expressed CD133 on their surface andcapable of pluripotency as expressed by Oct4 positive. Tumor hypoxic conditionalso play a role in glioma cancer stem cells self renewal. Aim of this study is toinvestigate correlation between glioma cancer stem cells, degree of malignancy,pluripotency and hypoxia. Design of this study is cross sectional with 35 gliomasamples comprises of 20 low grade malignant glioma and 15 high grade malignantglioma. Expression of mRNA CD133, Oct4 and HIF-1α were measured usingqRT-PCR. HIF-1α protein expression was detected by immunohistochemistryfrom glioma sample. mRNA CD133 and Oct4 expression significantly higher (p <0.05, Mann-Whitney) in high grade malignant glioma compared to low grademalignant glioma. HIF-1α tissue expression significantly higher (p < 0,01, Mann-Whitney) in high grade malignant glioma compared to low grade malignantglioma. There was correlation between expression of CD133 glioma cancer stemcells marker with pluripotency and hypoxia (r = 0,518, r = 0,543; Spearman?s rho)and pluripotency with hypoxia in high grade malignant glioma (r = 0,749;Spearman?s rho). mRNA CD133, Oct4 and HIF-1α expression increased withhigh grade malignant glioma. There was significant correlation between CD133glioma cancer stem cell marker with pluripotency and hypoxia in high grademalignant glioma, Glioma is primary brain tumor with frequent therapeutic resistance. Gliomacancer stem cells were considered to play a role in resistance and recurrence oftumor cells. Glioma cancer stem cells expressed CD133 on their surface andcapable of pluripotency as expressed by Oct4 positive. Tumor hypoxic conditionalso play a role in glioma cancer stem cells self renewal. Aim of this study is toinvestigate correlation between glioma cancer stem cells, degree of malignancy,pluripotency and hypoxia. Design of this study is cross sectional with 35 gliomasamples comprises of 20 low grade malignant glioma and 15 high grade malignantglioma. Expression of mRNA CD133, Oct4 and HIF-1α were measured usingqRT-PCR. HIF-1α protein expression was detected by immunohistochemistryfrom glioma sample. mRNA CD133 and Oct4 expression significantly higher (p <0.05, Mann-Whitney) in high grade malignant glioma compared to low grademalignant glioma. HIF-1α tissue expression significantly higher (p < 0,01, Mann-Whitney) in high grade malignant glioma compared to low grade malignantglioma. There was correlation between expression of CD133 glioma cancer stemcells marker with pluripotency and hypoxia (r = 0,518, r = 0,543; Spearman’s rho)and pluripotency with hypoxia in high grade malignant glioma (r = 0,749;Spearman’s rho). mRNA CD133, Oct4 and HIF-1α expression increased withhigh grade malignant glioma. There was significant correlation between CD133glioma cancer stem cell marker with pluripotency and hypoxia in high grademalignant glioma] |
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