NF1 mutation

We identified molecular alterations and immune-related features that distinguish wtRET from mutRET MTC. While RET mutation drives MTC in the absence of other alterations, we showed that wtRET MTC frequently harbors MAPK pathway mutations. These findings may indicate a potential basis for MAPK-targeted therapy, possibly in combination with oncology immune-oncology agents for selected patients with wtRET MTC.

Ner-G was charactered by low immune infiltration levels, stromal contents, tumor mutation burden, copy number alterations, DNA repair activity, cell proliferation, epithelial-mesenchymal transformation, stemness, intratumor heterogeneity, androgen receptor expression and EGFR, PTEN, NF1 and MUC16 mutation rates, while high enrichment of neurons and nervous system pathways, and high tumor purity, estrogen receptor expression, IDH1 and CIC mutation rates, temozolomide response rate and overall and disease-free survival rates...Furthermore, the abundance of neurons is positively associated with clinical outcomes in gliomas, while the enrichment of immune and stromal cells has a negative association with them. Our classification method provides new insights into the tumor biology of gliomas, as well as clinical implications for the precise management of this disease.

Herein, we add to the sparce literature regarding tumor gene characteristics of rare GU malignancies. MDR testing appears to be a useful adjunct in postoperative rare GU malignancy surveillance. MDR may anticipate recurrence or progression compared to standard techniques and correlation with response to systemic therapy.

NRAS mutation in CMs correlated with significantly worse overall survival. Elevated TMB was associated with increased progression-free survival for patients treated with a combination of dual ICI, supporting the potential utility of TMB as a predictive biomarker for ICI response in melanoma.

Together, these findings establish midkine and neuronal hyperexcitability as targetable drivers of Nf1-OPG growth and support the use of lamotrigine as a potential chemoprevention or chemotherapy agent for children with NF1-OPG.

We suggest a potential novel treatment option for some NETs/PPGLs, but also provide evidence for caution when applying cannabinoids as supportive therapy for pain or appetite management to cancer patients, and possibly as health supplements.

P1, N=8, Completed, Istari Oncology, Inc. | Active, not recruiting --> Completed | Phase classification: P1b --> P1 | N=12 --> 8

P1, N=53, Active, not recruiting, Pfizer | N=36 --> 53

Although the etiology behind the extensive stromal retraction in our tumors is unknown, this may likely be artifactual in nature. Nonetheless, it is important to include MPC-like chromophobe RCC in the spectrum of "variant" morphologies to avoid diagnostic pitfalls from micropapillary carcinoma.

This was performed in the context of metastatic melanoma and the role of metastasectomy in the metastatic melanoma population. A comprehensive review of these molecular characteristics is presented with a focus on their prognosis and role in surgical metastasectomy.

The findings of this study suggest both activity and safety for the combination of chemotherapy and the mTOR inhibitor everolimus (CT+EVE) in patients with HER2- mBC who have alterations in the PI3K pathway, particularly those who have received fewer prior chemotherapy. However, it is crucial to note that large-scale, randomized control studies are warranted to more comprehensively characterize the efficacy and safety of this combination therapy.

AgNP was able to selectively remove pNF cells from a co-culture with patient-matched Schwann cells. Therefore, AgNPs represent a new approach for clinical management of NF1-associated pNF to address significant clinical need.

Compared to a cohort of therapy-related myelodysplastic syndrome, tCMML had lower TP53 mutation frequency (12% vs 44.4%, P <.001) and less unfavorable outcomes. In summary, tCMML does not exhibit the high-risk features and poor outcomes of t-MNs.

P1/2, N=22, Terminated, Chia Tai Tianqing Pharmaceutical Group Co., Ltd. | N=192 --> 22 | Trial completion date: Dec 2024 --> Feb 2024 | Recruiting --> Terminated; sponsor adjusts its research and development strategy

Mouse genetic and human xenograft MPNST models treated with STING agonist plus ICB exhibited growth delay via increased apoptotic cell death. This strategy offers a potential treatment regimen for MPNST.

P1, N=100, Recruiting, Ascentage Pharma Group Inc. | N=60 --> 100

P1, N=42, Recruiting, National Cancer Institute (NCI) | Trial completion date: Mar 2024 --> Mar 2025 | Trial primary completion date: Mar 2024 --> Mar 2025

HGAP lesions may involve the brain or spine and tend to be midline or paramedian in location. Underlying neurofibromatosis type 1 diagnosis or imaging findings are important diagnostic cues.

In addition, we show that a mono-allelic deletion in NF1 in an isogenic context is sufficient to impair cell differentiation into osteoblasts. Overall, this study highlights the relevance of generating isogenic lines, which may help in genotype-phenotype correlation and provide a human cellular model to understand the molecular mechanisms underlying NF1 and, thus, discover new therapeutic strategies.

P2, N=20, Recruiting, University of Alabama at Birmingham | Trial completion date: Feb 2026 --> Feb 2027 | Trial primary completion date: Feb 2025 --> Feb 2026

CT and MRI are commonly used imaging modalities for GIST in NF1, while they may be negative sometimes. As DBE a more practical and non-invasive method now, we consider it is a valuable method for screening and early detecting small intestine disease for NF1 patients.

Distinct molecular characteristics including tumor immune components and genomic alterations are associated with 1L response in advanced NSCLC. Real-world data analyses provide opportunity to explore distinct mechanisms of therapy resistance and identify potential biomarkers of therapy response for further validation in clinical studies.

SOX9 increased collagen VI secretions by enhancing the activation of PCOLCE in neurofibroma cells. These findings might provide new perspectives on the pathophysiological significance of SOX9 in neurofibromas and elucidate a novel molecular mechanism underlying neurofibromas.

The results suggest that a previously unknown ocular manifestation of neurofibromatosis type I, namely choroidal nodules, has a higher prevalence than Lisch nodules also in the pediatric population and can be easily visualized using various imaging modalities. It will be important to include follow-up observation of this finding among the standard controls for ocular findings in NF1, and it will be very interesting to correlate this f inding with the exact NF1 mutation.

P2, N=137, Active, not recruiting, Canadian Cancer Trials Group | Trial completion date: Jan 2024 --> Dec 2024

This study indicated that Chinese IGCT patients may have distinct genetic characteristics and identified several possible genetic alterations that have the potential to become prognostic biomarkers of NGGCT patients.

P2, N=26, Active, not recruiting, University of Florida | Trial completion date: Dec 2023 --> Jun 2024

Our results illustrate that evolution of MF from ET/PV/PrePMF likely advances with age, accumulation of mutations, and activation of proliferative pathways. The genes and pathways identified by integrated genomics approach provide insight into disease transformation and progression, and potential targets for therapeutic intervention.

Finally, if PA recurs, a new surgical approach should be performed. At present, novel therapy involving agents targeting MAPK signalling pathway dysregulation is in development, defining BRAF and MEK inhibitors as target therapeutical agents.

The molecular landscape of CoM in Chinese patients was updated with new findings. A relatively high frequency of mutated FAT4 was determined in Chinese CoM patients, and decreased expression of FAT4 was found in patients with worse prognoses. In addition, both BRAF mutations and FAT4 mutations could serve as predictive factors for CoM patients.

This is the first reported case of SDC in the submandibular gland in a patient with NF1. The mutational data by NGS may contribute to a better understanding of the oncogenesis of SDC in patients with NF1.

HC is predominantly lobular phenotype but rare cases can exhibit E-cadherin expression. With ER low+/triple-negative status and low proliferation index, HC may not be responsive to chemotherapy or endocrine therapy, yet frequently recurs or metastasizes. Targeting the PI3K pathway or AR is a potential therapeutic strategy.

P2, N=16, Terminated, Anita Turk | N=35 --> 16 | Trial completion date: Jul 2024 --> Aug 2023 | Recruiting --> Terminated | Trial primary completion date: Jun 2024 --> Aug 2023; Lack of efficacy.

P1, N=100, Recruiting, Taiho Oncology, Inc. | N=242 --> 100 | Trial completion date: Jun 2024 --> Jul 2027 | Trial primary completion date: Oct 2023 --> Jul 2024

P=N/A, N=0, Withdrawn, Roger Packer | N=20 --> 0 | Suspended --> Withdrawn | Trial primary completion date: Jul 2023 --> Feb 2024

The histopathology and molecular genetics designated the lesion as having a uveal melanoma-like profile, suggesting that it may behave as a choroidal melanoma. This case underscores the importance of the association between ocular melanocytosis and orbital melanoma and provides additional evidence for primary orbital melanoma etiopathogenesis.

NF1-mutated tumors have higher TMB (p < 0.0001), higher expression of immune genes ("hot phenotype") and higher CD8 + T cell (p = 0.03) and macrophage (p = 0.02) infiltrations compared to NF1 wild-type tumors. NF1 mutation status appears as a candidate predictive biomarker for ICI response in lung adenocarcinoma patients.

Melanoma patients with ARID mutations exhibited higher prevalence of markers associated with ICI response, including TMB-H, and immune-related signatures. Our data also suggests improved survival outcome in patients with ARID2 mutations, irrespective of anti-PD1 therapy.

Next-gen molecular sequencing of tumors in metastatic melanoma patients was useful in identifying genetic subpopulations with an increased or reduced risk of brain metastases. This may allow eventual personalization of screening strategies.

Our results provide evidence for fine motor skill learning issues upon induction of an Nf1 mutation in mature myelinating cells. Together with previous connectivity, cellular, and molecular analyses, these results diversify the potential treatments for neurological issues in NF1.

In a population of pan-negative melanoma, we detected 15.2% of RAF fusion. Fusion detection allowed the introduction of a second line of targeted therapy, in the absence of a validated therapeutic option in 55.5% of cases. This study suggests the relevance of detecting RAF fusion in a selected population.

A small group of patients with IDH-wild-type GBM survive more than 5 years. While there are few differences in the global methylation profiles of LTS compared to STS, our study highlights potential pathways involved in GBMs with a good or poor prognosis.