Reference Detail

Contact

Missing content? – Request curation!

Request curation for specific Genes, Variants, or PubMed publications.

Have questions, comments, or suggestions? - Let us know!

Email us at : ckbsupport@jax.org

Ref Type Journal Article
PMID (36198031)
Authors Llaurado Fernandez M, Hijmans EM, Gennissen AMC, Wong NKY, Li S, Wisman GBA, Hamilton A, Hoenisch J, Dawson A, Lee CH, Bittner M, Kim H, DiMattia GE, Lok CAR, Lieftink C, Beijersbergen RL, de Jong S, Carey MS, Bernards R, Berns K
Title NOTCH Signaling Limits the Response of Low-Grade Serous Ovarian Cancers to MEK Inhibition.
URL
Abstract Text Low-grade serous ovarian cancer (LGSOC) is a rare subtype of epithelial ovarian cancer with high fatality rates in advanced stages due to its chemoresistant properties. LGSOC is characterized by activation of MAPK signaling, and recent clinical trials indicate that the MEK inhibitor (MEKi) trametinib may be a good treatment option for a subset of patients. Understanding MEKi-resistance mechanisms and subsequent identification of rational drug combinations to suppress resistance may greatly improve LGSOC treatment strategies. Both gain-of-function and loss-of-function CRISPR-Cas9 genome-wide libraries were used to screen LGSOC cell lines to identify genes that modulate the response to MEKi. Overexpression of MAML2 and loss of MAP3K1 were identified, both leading to overexpression of the NOTCH target HES1, which has a causal role in this process as its knockdown reversed MEKi resistance. Interestingly, increased HES1 expression was also observed in selected spontaneous trametinib-resistant clones, next to activating MAP2K1 (MEK1) mutations. Subsequent trametinib synthetic lethality screens identified SHOC2 downregulation as being synthetic lethal with MEKis. Targeting SHOC2 with pan-RAF inhibitors (pan-RAFis) in combination with MEKi was effective in parental LGSOC cell lines, in MEKi-resistant derivatives, in primary ascites cultures from patients with LGSOC, and in LGSOC (cell line-derived and patient-derived) xenograft mouse models. We found that the combination of pan-RAFi with MEKi downregulated HES1 levels in trametinib-resistant cells, providing an explanation for the synergy that was observed. Combining MEKis with pan-RAFis may provide a promising treatment strategy for patients with LGSOC, which warrants further clinical validation.

Filtering

  • Case insensitive filtering will display rows if any text in any cell matches the filter term
  • Use simple literal full or partial string matches
  • Separate multiple filter terms with a space. Any order may be used (i. e. a b c and c b a are equivalent )
  • Filtering will only apply to rows that are already loaded on the page. Filtering has no impact on query parameters.
  • Use quotes to match on a longer phrase with spaces (i.e. "mtor c1483f")

Sorting

  • Generally, the default sort order for tables is set to be first column ascending; however, specific tables may set a different default sort order.
  • Click on any column header arrows to sort by that column
  • Hold down the Shift key and click multiple columns to sort by more than one column. Be sure to set ascending or descending order for a given column before moving on to the next column.

Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
MAP2K1 F129L ovarian serous carcinoma resistant Binimetinib Preclinical - Cell culture Actionable In a preclinical study, a low grade serous ovarian cancer cell line harboring MAP2K1 F129L was resistant to treatment with Mektovi (binimetinib) in culture (PMID: 36198031). 36198031
MAP2K1 F129L ovarian serous carcinoma resistant Selumetinib Preclinical - Cell culture Actionable In a preclinical study, a low grade serous ovarian cancer cell line harboring MAP2K1 F129L was resistant to treatment with Koselugo (selumetinib) in culture (PMID: 36198031). 36198031
MAP2K1 F129L ovarian serous carcinoma resistant Trametinib Preclinical - Cell culture Actionable In a preclinical study, MAP2K1 F129L was identified in a low grade serous ovarian cancer cell line that developed resistance to treatment with Mekinist (trametinib) in culture (PMID: 36198031). 36198031
MAP2K1 F129L ovarian serous carcinoma resistant Refametinib Preclinical - Cell culture Actionable In a preclinical study, a low grade serous ovarian cancer cell line harboring MAP2K1 F129L was resistant to treatment with Refametinib (BAY86-9766) in culture (PMID: 36198031). 36198031