Co-targeting BET bromodomain BRD4 and RAC1 suppresses growth, stemness and tumorigenesis by disrupting the c-MYC-G9a-FTH1axis and downregulating HDAC1 in molecular subtypes of breast cancer

التفاصيل البيبلوغرافية
العنوان: Co-targeting BET bromodomain BRD4 and RAC1 suppresses growth, stemness and tumorigenesis by disrupting the c-MYC-G9a-FTH1axis and downregulating HDAC1 in molecular subtypes of breast cancer
المؤلفون: Nour Al-Jabi, Amjad Ali, Khuloud Bajbouj, Rola Abu Jabal, Hema Unnikannan, Jasmin Shafarin, Jibran Sualeh Muhammad, Mawieh Hamad
المصدر: International Journal of Biological Sciences
بيانات النشر: Ivyspring International Publisher, 2021.
سنة النشر: 2021
مصطلحات موضوعية: rac1 GTP-Binding Protein, Carcinogenesis, Cell Cycle Proteins, Histone Deacetylase 1, medicine.disease_cause, Applied Microbiology and Biotechnology, Metastasis, Mice, Breast cancer, Histocompatibility Antigens, Cell migration, Azepines, Gene Expression Regulation, Neoplastic, c-MYC, FTH1, Aminoquinolines, BRD4, Female, Oxidoreductases, BET bromodomain, RAC1, Research Paper, G9a, JQ1, Mice, Nude, Breast Neoplasms, Biology, Proto-Oncogene Proteins c-myc, Cell Line, Tumor, medicine, Animals, Humans, Molecular Biology, Ecology, Evolution, Behavior and Systematics, NSC23766, Cell Proliferation, Cell growth, Cancer, Cell Biology, Histone-Lysine N-Methyltransferase, Triazoles, medicine.disease, Xenograft Model Antitumor Assays, HDAC1, Pyrimidines, Ferritins, Cancer research, Developmental Biology, Transcription Factors
الوصف: BET bromodomain BRD4 and RAC1 oncogenes are considered important therapeutic targets for cancer and play key roles in tumorigenesis, survival and metastasis. However, combined inhibition of BRD4-RAC1 signaling pathways in different molecular subtypes of breast cancer including luminal-A, HER-2 positive and triple-negative breast (TNBC) largely remains unknown. Here, we demonstrated a new co-targeting strategy by combined inhibition of BRD4-RAC1 oncogenic signaling in different molecular subtypes of breast cancer in a context-dependent manner. We show that combined treatment of JQ1 (inhibitor of BRD4) and NSC23766 (inhibitor of RAC1) suppresses cell growth, clonogenic potential, cell migration and mammary stem cells expansion and induces autophagy and cellular senescence in molecular subtypes of breast cancer cells. Mechanistically, JQ1/NSC23766 combined treatment disrupts MYC/G9a axis and subsequently enhances FTH1 to exert antitumor effects. Furthermore, combined treatment targets HDAC1/Ac-H3K9 axis, thus suggesting a role of this combination in histone modification and chromatin modeling. C-MYC depletion and co-treatment with vitamin-C sensitizes different molecular subtypes of breast cancer cells to JQ1/NSC23766 combination and further reduces cell growth, cell migration and mammosphere formation. Importantly, co-targeting RAC1-BRD4 suppresses breast tumor growth in vivo using xenograft mouse model. Clinically, RAC1 and BRD4 expression positively correlates in breast cancer patient's samples and show high expression patterns across different molecular subtypes of breast cancer. Both RAC1 and BRD4 proteins predict poor survival in breast cancer patients. Taken together, our results suggest that combined inhibition of BRD4-RAC1 pathways represents a novel and potential therapeutic approach in different molecular subtypes of breast cancer and highlights the importance of co-targeting RAC1-BRD4 signaling in breast tumorigenesis via disruption of C-MYC/G9a/FTH1 axis and down regulation of HDAC1.
اللغة: English
تدمد: 1449-2288
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91bea7976a4927441f8fa8447f4fe064Test
http://europepmc.org/articles/PMC8579449Test
حقوق: OPEN
رقم الانضمام: edsair.doi.dedup.....91bea7976a4927441f8fa8447f4fe064
قاعدة البيانات: OpenAIRE