A novel role for Neurog2 in MYCN driven neuroendocrine plasticity of prostate cancer
Prachi Walke1,2, Jared D W Price1, Frederick S Vizeacoumar1,3
1Department of Oncology, College of Medicine, University of Saskatchewan, Saskatoon, S7N 5E5, SK, Canada.
Abstract:
Neuroendocrine prostate cancer (NEPC) presents a formidable clinical challenge owing to its aggressive progression and resistance to conventional therapies. A key driver of NEPC is the overexpression of MYCN, a well-established oncogene associated with neuroendocrine tumors. However, efforts to directly inhibit the N-Myc protein encoded by this gene have resulted in limited success, thereby hindering therapeutic advancements. To overcome this obstacle, we conducted unbiased genome-wide screening using isogenic prostate cancer cell lines to identify the synthetic vulnerabilities of MYCN. Among the identified candidates, NEUROG2 emerged as a significant candidate. Neurog2 is a proneural transcription factor (PTF) known for its role in developmental processes and trans-differentiation of adult cells. Our findings demonstrate that Neurog2 depletion does not affect non-malignant cells but significantly suppresses the growth of MYCN-overexpressing cells and tumors in orthotopic NEPC models. Furthermore, our observations indicate that Neurog2-driven modulation of PTFs potentially contribute to NEPC development. Thus, targeting Neurog2 holds promise as an effective therapeutic strategy for MYCN-overexpressing NEPC.
Insights
Targeting NEUROG2 shows promise for treating neuroendocrine prostate cancer (NEPC) driven by MYCN overexpression. Depleting NEUROG2 suppressed tumor growth without harming normal cells, offering a new therapeutic avenue.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Neuroendocrine prostate cancer (NEPC) is aggressive and therapy-resistant.
- MYCN oncogene overexpression drives NEPC, but direct N-Myc inhibition has failed.
- Identifying synthetic vulnerabilities of MYCN is crucial for novel NEPC treatments.
Purpose of the Study:
- To identify therapeutic targets by screening for synthetic vulnerabilities of MYCN in NEPC.
- To investigate the role of NEUROG2 as a potential therapeutic target in MYCN-driven NEPC.
Main Methods:
- Unbiased genome-wide screening using isogenic prostate cancer cell lines.
- Assessment of NEUROG2 depletion effects on MYCN-overexpressing NEPC cells and orthotopic tumor models.
- Analysis of NEUROG2's role in modulating proneural transcription factors (PTFs).
Main Results:
- NEUROG2 was identified as a significant synthetic vulnerability of MYCN.
- NEUROG2 depletion suppressed the growth of MYCN-overexpressing NEPC cells and tumors.
- NEUROG2 depletion did not affect non-malignant cells.
- NEUROG2-driven PTF modulation may contribute to NEPC development.
Conclusions:
- Targeting NEUROG2 presents a promising therapeutic strategy for MYCN-overexpressing NEPC.
- NEUROG2 is a critical factor in the progression of NEPC driven by MYCN.
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