KRAS G12V

This breakthrough led to the development and approval of sotorasib (AMG510) and adagrasib (MRTX849), revolutionizing the treatment of KRASG12C-dependent lung cancer. Insights from successful KRASG12C targeting informed the design of molecules addressing other mutations, often in a covalent manner. These findings offer promise for innovative approaches in addressing commonly occurring KRAS mutations such as G12D, G12V, G12A, G12S, and G12R in various cancers.

In patients with CRC PM, different KRAS mutation subgroups can be determined according to specific codon substitution, with some mutations (KRASMUT1) that could have a similar prognosis to wild-type patients. These findings should be further investigated in larger series.

Furthermore, novel technologies and therapies are being developed to target specific mutant subtypes, with encouraging early results. In this paper, we aim to review the recent studies regarding the relative impact of specific mutant KRAS subtypes on oncologic outcomes, the application of variant allele frequency in next generation sequencing analyses, and the ongoing research into therapies targeting specific mutant KRAS subtypes.

These proteins are captured through the strong interaction between the biotin label and streptavidin bead and subsequently identified by mass spectrometry. Here, we developed a protocol using CRISPR-mediated gene editing to generate endogenous BioID2-tagged KrasG12D and KrasG12V isogenic murine colon epithelial cell lines to identify unique protein proximity partners by BioID.

Halo, vacuole, angiogram, and dead branch signs were frequently observed in consolidative-type IMA. Kirsten rat sarcoma viral oncogene mutations are common in consolidative-type IMA, especially site G12V, whereas epidermal growth factor receptor mutations were rare; therefore, gene immunotherapy was more difficult. Most patients were in stage T3-T4; however, lymph node metastasis was rare.

Meanwhile, mannose-binding lectin (rRSL [Ralstonia solanacearum] and rBC2LA [Burkholderia cenocepacia]) signals were higher while those of galactose-binding lectins (rGal3C and rCGL2) were lower in the KRAS mutants. We demonstrated here that PDAC 3D-cultured organoids with KRAS mutations were dominantly covered in increased fucosylated glycans, pointing towards novel treatment targets and/or tumor markers.

KRAS G12V mutation was associated with aggressive clinical-pathological phenotype and early recurrence. To note, this mutation exhibited significantly worse prognosis in part-solid and stage Ⅰ lung adenocarcinoma patients. Meanwhile, the prognostic significance of KRAS G12C and G12V variants were comparable.

Accordingly, we have tested FTIs (tipifarnib and lonafarnib) in G12C mutant human cancer cell lines in vitro and in vivo. At last, we have also tested FTIs on G12V mutant human cancer cells and again we have detected antitumoral effects. We suggest that FTIs may have clinical relevance outside the HRAS mutant cancers.

The experimental design featured orthotopic tumors formed by luciferase labeled PaCa-44 cells; administration of hRabMab1 alone or in combination with gemcitabine/paclitaxel (gem/PTX); and the assessment of the treatment outcomes on the primary tumor tissue as well as systemic spread. We here demonstrate for the first time that hRabMab1 may help suppress metastasis in PDAC. hRabMab1's ability to improve the efficacy of chemotherapy is significant and warrants further investigation.

In mouse models of gastric and intestinal cancer, a cell-permeable MTMR7-CC mimicry peptide decreased tumour growth, Ki67 proliferation index and ERK1/2 nuclear positivity. Thus, MTMR7 mimicry peptide(s) could provide a novel strategy for targeting mutant K-RAS in cancers.

In the adjuvant-only subset, KRAS G12R had the longest OS compared with G12D, G12V, and other alleles (median OS unreached/undefined versus 1009, 1129, and 1222 days, respectively). PDACs with different mutant KRAS alleles are associated with distinct morphologies and clinical outcomes, with KRAS G12R allele associated with P+LD morphology and longer OS when compared with G12D using Kaplan-Meier studies.

The evaluation of the nRichDX Revolution Sample Prep System on the MassARRAY System has demonstrated its effectiveness in achieving 0.1% VAF detection in plasma and urine samples. The nRichDX System extracts cfDNA and ctDNA with consistently high yields. Two sample T-Test analysis shows that the nRichDX System performed significantly better than the QIAGEN and Thermo Fisher Scientific extraction kits.

Our data suggest that KRAS G12C mutations are more frequent in early-onset metastatic CRC. To the best of our knowledge, this is the largest cohort in the Latin American population with metastatic CRC reporting RAS, BRAF and MSI/MMR status.

Here we describe cell lines that exhibit doxycycline-dependent expression KRASG12V or BRAFV600E and harbour a stably integrated EGR1:EmGFP reporter gene that can be detected by flow cytometry, high-content microscopy or immunoblotting...Finally, substitution of EmGFP for a bacterial nitroreductase gene allowed KRASG12V or BRAFV600E to drive cell death in the presence of a pro-drug, which may allow selection of pathway inhibitors that promote survival. These cell lines should prove useful for cell-based screens to identify new regulators of KRAS- or BRAF-dependent ERK1/2 signalling (drug target discovery) as well as screening or triaging 'hits' from drug discovery screens.

In conclusion, our findings shed light on the unique molecular complexity of PBL, unveiling its mutational landscape and potential therapeutic targets. Due to the rarity of PBL, further research with a more extensive sample size is essential to completely elucidate the mutational landscape of PBL.

P1, N=15, Recruiting, Chinese PLA General Hospital | N=10 --> 15

Incorporation of SB-T-121605 and SB-T-121606 into in vivo therapeutic regimens containing paclitaxel was effective in suppressing tumor growth in Paca-44 tumor-bearing mice at small doses (≤3 mg/kg). SB-T-121605 and SB-T-121606 in combination with paclitaxel are promising candidates for the next phase of preclinical testing.

Sotorasib showed selective inhibition in vitro and in vivo with altered tumor microenvironment, including fibroblasts and macrophages. Collectively, screening for KRAS single mutations in plasma ctDNA and the use of preclinical models of PDO and PDX with genetic mutations would impact precision medicine in the context of PDAC.

Conclusions NGS-ctDNA provided clinically informative results for 26% of pts with advanced lung SCC, including 6% for whom targeted therapies are available in routine practice or clinical trials (4% ESMO ESCAT tier I and 2% ESMO ESCAT tier IIB). These results suggest that molecular profiling, including plasma NGS testing, should be considered in this population.

Moreover, mutations EGFR L858R and KRAS G12V were simultaneously detected at sensitivities equivalent to LODs of 0.57 and 0.47%, respectively. These results indicate that < 1% of mutations in multiplex gene mutations can be simultaneously detected, and that possibility suggests that the developed method can be used in clinical practice for detecting cancers.

Contrary to our expectations, loss of Ppp6c decreased proliferation, anchorage-independent growth in soft agar, and tumor formation of oncogenic Ras-expressing mouse embryonic fibroblasts (MEFs). These findings show that oncogenic K-RasG12V cannot overcome proliferation failure caused by loss of Ppp6c in MEFs.

P1/2, N=100, Recruiting, Affini-T Therapeutics, Inc. | Not yet recruiting --> Recruiting

In the non-hypermutated CRC cohort, the prognostic risk of various RAS/BRAF allele mutations varied between local and metastatic CRC. KRAS G13D mutation tended to be the only prognostic marker for stages I-III CRC; however, KRAS G13D/G12V/G12C mutations collectively defined a high-risk subgroup of mCRC patients with poor prognosis, who would benefit from intensive triplet chemotherapy.

In this cohort, the timing and patterns of recurrence appeared to be associated with the patient's molecular profile. KRAS codon 12 mutations were the worst predictors of recurrence-free survival at all stages in our population.

P1, N=12, Recruiting, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins | Trial completion date: Apr 2026 --> Apr 2027 | Trial primary completion date: Apr 2024 --> Apr 2025

We show that binding of this inhibitor significantly perturbs the state 1 - state 2 equilibrium and induces an inactive state 1 conformation in GTP-bound KRAS G12C. In the presence of BBO-8956, RAF1 RBD is unable to induce a signaling competent state 2 conformation within the ternary complex, demonstrating the mechanism of action (MOA) for this novel, active-conformation inhibitor.

P2, N=90, Completed, Verastem, Inc. | Recruiting --> Completed | Trial completion date: Dec 2025 --> Dec 2023 | Trial primary completion date: Mar 2023 --> Aug 2023

P1/2, N=8, Suspended, National Cancer Institute (NCI) | N=110 --> 8 | Recruiting --> Suspended

The dynamic perspective is essential for understanding the behaviour of tumours with specific genotypes, especially from the second line onward. This may be relevant in patient monitoring and treatment decision-making, particularly in cases with distinct mutations.

The novel perspective offered by this approach on protein dynamics, function, and allostery has potential implications for understanding and targeting other protein complexes involved in vital cellular processes. The results contribute to our understanding of the effects of oncogenic mutations on protein-protein interactions and provide a foundation for future therapeutic interventions in the context of KRAS-associated cancers and beyond.

In addition, the ion mobility separation of isomeric peptides using FAIMS facilitated the unambiguous identification of K-Ras G12D and G13D peptides. The application of targeted LC-MS/MS analyses using FAIMS is demonstrated for the detection and quantitation of B-Raf V600E, K-Ras G12D, G13D, and G12V in CRC cell lines and primary specimens.

scRNA-seq analysis suggests that the cholesterol synthesis pathway is upregulated specifically in the KRAS mutant organoids, including the key cholesterol synthesis regulator SREBP2. Perhexiline maleate decreases SREBP2 expression levels and reverses the KRAS mutant-induced upregulation of the cholesterol synthesis pathway.

Collectively, this study suggests that Nrf2 could be a promising therapeutic target in KRAS-mediated dedifferentiation of thyroid cancer.

A Cox Proportional Hazard analysis of OS across all patients found that Gemcitabine and Gemcitabine with Nabpaclitaxel had significantly higher HR than FOLFIRINOX... Our data suggest that FOLFIRINOX has a longer TTNT than other first-line regimens for KRAS G12C, G12V, G12D, and G12R. KRAS G12C was associated with the shortest OS among common KRAS mutations. >

Detection of KRAS mutation in liquid biopsies of patients with metastatic PDAC is associated with worse OS. KRAS G12D/Q61 alterations detection is associated with worse OS compared to other KRAS mutation subtypes. Ct-DNA detection of co-occurring CDKN2A mutation is associated with worse OS in patients with KRAS positive metastatic disease.

Patient backgrounds did not differ significantly in terms of age (median 61/63), sex (male 49%/48%), performance status (PS0 32%/32%), site of primary tumor (right 33%/32%), number of metastatic sites (3≤ 28%/23%), treatment regimen (doublet 90%/92%, triplet 3%/4%), or first line bevacizumab (yes 81%/79%)... The KRAS G12D mutation did not show a detrimental prognostic impact on PFS and OS compared to KRAS non-G12D mutations in patients with RAS-mutated mCRC.

We did not confirm the negative predictive value of KRAS G12 mutation in patients treated with T/T, however, OS depends on the specific G12 mutation. In contrast, patients with KRAS G13 mutation had worse survival.

KRAS G12D is associated with unique co-occurring molecular alterations compared to KRAS G12C in CRC. ctDNA-based NGS platforms can survey candidate alterations associated with primary resistance to KRAS G12D targeting in CRC. Further validation in preclinical models is needed.

In our Brazilian cohort of mCRC patients, frequencies of RAS and BRAF mutations were similar to worldwide data. However, we found lower than expected frequency of MSI-high tumors. KRAS G12C mutation was associated with early-onset mCRC, an emergent population in which KRAS G12C inhibitors might be particulary useful.

As part of a nationwide cancer genome screening project, J-SCRUM GI SCREEN database provides comprehensive genomic information for Asian population (Japan). The prevalence of key actionable gene alterations in each tumor type was highly comparable between J-SCRUM GI-SCREEN and TCGA data.

ELI-002 2P is a lymph node targeted immunotherapy comprised of Amphiphile (Amph)-modified G12D, G12R, G12V, G12C, G12A, G12S and G13D mutant KRAS peptides together with an Amph-modified CpG oligonucleotide adjuvant...Subsequent patients will receive up to 10 doses of Amph-peptides 7P 700 mcg each (4.9 mg total), together with Amph-CpG-7909 (10.0 mg) administered over a five-month treatment period...An interim analysis is planned using group sequential design for control of overall alpha 0.10. Clinical trial information: NCT05726864.

Importantly, KRB-456 inhibits P-MEK, P-AKT and P-S6 levels in vivo and inhibits the growth of subcutaneous and orthotopic xenografts derived from pancreatic cancer patients whose tumors harbor KRAS G12D and KRAS G12V and who relapsed after chemotherapy and radiation therapy. These results warrant further development of KRB-456 for pancreatic cancer.