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[Latar Belakang: Kanker payudara masih merupakan kanker yang paling umumpada wanita. Identifikasi sel punca kanker payudara sangat penting dalammemberantas penyakit ini dari akarnya. Beberapa riset telah mengisolasi sel puncakanker payudara berdasarkan protein membran sel CD24/CD44 dan menemukansel punca kanker payudara pada sel CD24-/CD44+ yang menunjukkan sifatpluripotensi. Namun, beberapa riset lainnya menemukan CD24-/CD44+ tidakditemukan pada seluruh tipe kanker payudara, dan tidak selalu berhubungandengan perkembangan tumor. Maka dari itu, tingkat pluripotensi dari sel tersebutmasih diperdebatkan. Dalam riset ini, sifat pluripotensi sel punca kanker payudaradinilai berdasarkan ekspresi gen SOX2 yang merupakan gen untuk sifatkepuncaan dimana gen ini dapat mendorong pembelahan sel dan invasi.Metode: Sampel diambil dari situs primer kanker payudara dan difraksinasimelalui pemisahan sel magnetik. RT-qPCR dan elektroforesis digunakan untukmempelajari tingkat ekspresi gen SOX2 antara fraksi-fraksi sel punca kankerpayudara.Hasil: Kami berhasil memisahkan sel pluripoten dari spesimen klinis kankerpayudara. Fraksi CD24-/CD44- menunjukkan ekspresi gen SOX2 yang lebihtinggi secara signifikan dibanding CD24-/CD44+. Setelah melewati proses ultralowattachment, CD24-/CD44+ menunjukkan peningkatan ekspresi gen SOX2walaupun lebih rendah dari CD24-/CD44-.Kesimpulan: Pluripotensi yang tinggi, berdasarkan tingkat ekspresi gen SOX2,ditemukan pada fraksi CD24-/CD44-. Tingkat pluripotensi fraksi CD24-/CD44+lebih rendah dibandingkan fraksi CD24-/CD44-.;Background: Breast cancer remains as the most prevalent cancer in women.Identification of breast cancer stem cell (CSC) is crucial in eradicating the diseasefrom its root. Multiple research has isolated breast CSC based on CD24/CD44surface marker and discovered that CD24+/CD44- fraction indicates stemness andpluripotent characteristics. However, it was also found that CD24+/CD44- breastCSC is not present in all breast cancer types, and not always associated withtumor progression. Therefore, its pluripotency level remains debatable. In thisresearch, pluripotency of breast CSCs was assessed. Pluripotency was determinedbased on SOX2 gene expression, a gene responsible for stem-like properties,which can drive cellular proliferation and invasion.Method: The samples were taken from primary site of breast cancer andfractionated through magnetic cell sorting. RT-qPCR with subsequentelectrophoresis was used to study the expression level of SOX2 gene amongbreast CSC fractions.Results: We managed to separate the pluripotent cells from the bulk clinicalspecimen. CSC subset CD24-/CD44- showed a significantly higher SOX2expression in comparison to CD24-/CD44+. Following ultra-low attachment,CD24-/CD44+ showed an increase in SOX2 expression level although still lowerthan CD24-/CD44-.Conclusions: A high pluripotency based on SOX2 gene expression level wasfound in fraction CD24-/CD44-. The pluripotency level of fraction CD24-/CD44+was lower in comparison to fraction CD24-/CD44-., Background: Breast cancer remains as the most prevalent cancer in women.Identification of breast cancer stem cell (CSC) is crucial in eradicating the diseasefrom its root. Multiple research has isolated breast CSC based on CD24/CD44surface marker and discovered that CD24+/CD44- fraction indicates stemness andpluripotent characteristics. However, it was also found that CD24+/CD44- breastCSC is not present in all breast cancer types, and not always associated withtumor progression. Therefore, its pluripotency level remains debatable. In thisresearch, pluripotency of breast CSCs was assessed. Pluripotency was determinedbased on SOX2 gene expression, a gene responsible for stem-like properties,which can drive cellular proliferation and invasion.Method: The samples were taken from primary site of breast cancer andfractionated through magnetic cell sorting. RT-qPCR with subsequentelectrophoresis was used to study the expression level of SOX2 gene amongbreast CSC fractions.Results: We managed to separate the pluripotent cells from the bulk clinicalspecimen. CSC subset CD24-/CD44- showed a significantly higher SOX2expression in comparison to CD24-/CD44+. Following ultra-low attachment,CD24-/CD44+ showed an increase in SOX2 expression level although still lowerthan CD24-/CD44-.Conclusions: A high pluripotency based on SOX2 gene expression level wasfound in fraction CD24-/CD44-. The pluripotency level of fraction CD24-/CD44+was lower in comparison to fraction CD24-/CD44-.] |
S-Nobian Andre.pdf :: Unduh