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Gene | RB1 |
Variant | I101fs |
Impact List | frameshift |
Protein Effect | loss of function - predicted |
Gene Variant Descriptions | RB1 I101fs results in a change in the amino acid sequence of the Rb1 protein beginning at aa 101 of 928, likely resulting in premature truncation of the functional protein (UniProt.org). Due to the loss of all known functional domains (UniProt.org), I101fs is predicted to lead to a loss Rb1 protein function. |
Associated Drug Resistance | |
Category Variants Paths |
RB1 mutant RB1 inact mut RB1 I101fs |
Transcript | NM_000321.3 |
gDNA | chr13:g.(48342634_48342635) |
cDNA | c.(301_300) |
Protein | p.I101fs |
Source Database | RefSeq |
Genome Build | GRCh38/hg38 |
Transcript | gDNA | cDNA | Protein | Source Database | Genome Build |
---|---|---|---|---|---|
NM_001407166.1 | chr13:g.(48342634_48342635) | c.(301_300) | p.I101fs | RefSeq | GRCh38/hg38 |
NM_000321 | chr13:g.(48342634_48342635) | c.(301_300) | p.I101fs | RefSeq | GRCh38/hg38 |
NM_000321.2 | chr13:g.(48342634_48342635) | c.(301_300) | p.I101fs | RefSeq | GRCh38/hg38 |
NM_001407165.1 | chr13:g.(48342634_48342635) | c.(301_300) | p.I101fs | RefSeq | GRCh38/hg38 |
NM_000321.3 | chr13:g.(48342634_48342635) | c.(301_300) | p.I101fs | RefSeq | GRCh38/hg38 |
Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
---|---|---|---|---|---|---|---|
RB1 inact mut | retinoblastoma | sensitive | BAY 61-3606 | Preclinical | Actionable | In a preclinical study, a retinoblastoma cell line was sensitive to BAY 61-3606 in cell culture and in xenograft models, demonstrating increased apoptosis (PMID: 22237022). | 22237022 |
RB1 inact mut | retinoblastoma | sensitive | Nutlin-3a | Preclinical | Actionable | In a preclinical study, Nutlin-3a induced p53 pathway signaling in MDMX mouse models with retinoblastoma and 69% (70/102) of the eyes harvested from the mouse models demonstrated complete response or stable disease after 18 weeks of therapy (PMID: 21515735). | 21515735 |
RB1 inact mut | retinoblastoma | sensitive | Fostamatinib | Preclinical | Actionable | In a preclinical study, retinoblastoma cell lines demonstrated sensitivity to Fostamatinib resulting in cell death (PMID: 22237022). | 22237022 |
RB1 inact mut | glioblastoma | resistant | Palbociclib | Preclinical - Cell line xenograft | Actionable | In a preclinical study, Ibrance (palbociclib) failed to inhibit growth of RB1-deficient glioblastoma cell lines in culture and in intracranial cell line xenograft models (PMID: 20354191). | 20354191 |
RB1 mutant | osteosarcoma | sensitive | VCN-01 | Preclinical - Cell line xenograft | Actionable | In a preclinical study, VCN-01 decreased viability of a human RB1-mutant primary osteosarcoma cell line in culture, and inhibited tumor growth and decreased lung metastases in xenograft models (PMID: 26603261). | 26603261 |
RB1 mutant | estrogen-receptor positive breast cancer | predicted - resistant | Palbociclib | Phase III | Actionable | In a Phase III trial (PALOMA-3), acquired RB1 mutations were identified in patents with ER-positive, ERBB2 (HER2)-negative breast cancer at the end of treatment in the Faslodex (fulvestrant) plus Ibrance (palbociclib) but not the Faslodex (fulvestrant) plus placebo arm, suggesting a role in conferring resistance to Ibrance (palbociclib) (PMID: 30206110; NCT01942135). | 30206110 |