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BIOMARKER:

IDH wild-type

i
Other names: HEL-216, HEL-S-26, Epididymis Luminal Protein 216, Isocitrate Dehydrogenase 1 (NADP+), Epididymis Secretory Protein Li 26, IDH1, Isocitrate Dehydrogenase (NADP(+)) 1, Isocitrate Dehydrogenase 1 (NADP+), Soluble, IDH2, Isocitrate Dehydrogenase (NADP(+)) 2, Isocitrate Dehydrogenase (NADP(+)) 2, Mitochondrial, Isocitrate Dehydrogenase 2 (NADP+), Mitochondrial, Isocitrate Dehydrogenase [NADP], Mitochondrial, Oxalosuccinate Decarboxylase, NADP(+)-Specific ICDH, ICD-M, IDH, IDP, MNADP-IDH, D2HGA2, IDHM, IDPM
Entrez ID:
Related biomarkers:
4d
GlioVax: Efficiency of Vaccination With Lysate-loaded Dendritic Cells in Patients With Newly Diagnosed Glioblastoma (clinicaltrials.gov)
P2, N=136, Recruiting, Heinrich-Heine University, Duesseldorf | Trial completion date: Jun 2025 --> Mar 2027 | Trial primary completion date: Sep 2024 --> Nov 2026
Trial completion date • Trial primary completion date
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MGMT (6-O-methylguanine-DNA methyltransferase)
|
MGMT promoter methylation • IDH wild-type
|
temozolomide
5d
Engineered NK Cells Containing Deleted TGF-BetaR2 and NR3C1 for the Treatment of Recurrent Glioblastoma (clinicaltrials.gov)
P1, N=25, Recruiting, M.D. Anderson Cancer Center | Trial completion date: Jan 2025 --> Jan 2026 | Trial primary completion date: Jan 2025 --> Jan 2026
Trial completion date • Trial primary completion date
|
IDH wild-type
5d
Trial completion date • Combination therapy
|
MYCN (MYCN Proto-Oncogene BHLH Transcription Factor) • SMARCB1 (SWI/SNF Related, Matrix Associated, Actin Dependent Regulator Of Chromatin, Subfamily B, Member 1)
|
SMARCB1 mutation • IDH wild-type
|
temozolomide • Kisqali (ribociclib) • topotecan
6d
Comprehensive molecular characterization of long-term glioblastoma survivors. (PubMed, Cancer Lett)
Finally, we demonstrated that LTS and STS could be distinguished using a subset of molecular features. Taken together, the present study delineated unique molecular attributes of LTS GBM.
Journal • Tumor mutational burden
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TMB (Tumor Mutational Burden) • CD4 (CD4 Molecule)
|
IDH wild-type • SPEN mutation
8d
Glioma. (PubMed, Nat Rev Dis Primers)
Ependymal tumours are subdivided into biologically and prognostically distinct types on the basis of histology, molecular biomarkers and location. Although surgery, radiotherapy and alkylating agent chemotherapy are the mainstay of glioma treatment, individually tailored strategies based on tumour-intrinsic dominant signalling pathways have improved outcome in subsets of patients.
Review • Journal
|
BRAF (B-raf proto-oncogene)
|
IDH wild-type
9d
Escalated Dose Proton Therapy Within the Multimodality Treatment of Glioblastoma Patients (clinicaltrials.gov)
P=N/A, N=36, Recruiting, University of Aarhus | Not yet recruiting --> Recruiting
Enrollment open
|
IDH wild-type
10d
Gliomatosis cerebri in children: A poor prognostic phenotype of diffuse gliomas with a distinct molecular profile. (PubMed, Neuro Oncol)
Contrary to previous studies, our representative pediatric GC study provides evidence that GC has a strong predilection to arise on the background of specific molecular features (especially pedHGG_RTK2, pedHGG_A/B, EGFR and BCOR mutations, chromosome 6 rearrangements).
Journal
|
EGFR (Epidermal growth factor receptor) • TP53 (Tumor protein P53) • BCOR (BCL6 Corepressor)
|
EGFR mutation • BCOR mutation • IDH wild-type
10d
Malignant glioma in L-2-Hydroxyglutaric Aciduria: thorough molecular characterization of a case and literature review. (PubMed, Free Neuropathol)
Due to rapid tumor progression the patient died nine months after initial diagnosis. In this manuscript, we provide extensive molecular characterization of the tumor as well as a literature review focusing on oncogenetic considerations of L-2-HGA-associated CNS tumors.
Review • Journal
|
TP53 (Tumor protein P53) • NF1 (Neurofibromin 1) • BCOR (BCL6 Corepressor)
|
TP53 mutation • NF1 mutation • IDH wild-type
11d
Comprehensive analysis of the REST transcription factor regulatory networks in IDH mutant and IDH wild-type glioma cell lines and tumors. (PubMed, Acta Neuropathol Commun)
The identified gene regulatory networks and putative REST cooperativity with other TFs, such as KAISO, show distinct REST target regulatory networks in IDH-WT and IDH-MUT gliomas, without concomitant DNA methylation changes. We conclude that REST could be an important therapeutic target in gliomas.
Preclinical • Journal
|
IDH1 (Isocitrate dehydrogenase (NADP(+)) 1) • IDH2 (Isocitrate Dehydrogenase (NADP(+)) 2)
|
IDH1 mutation • IDH wild-type
12d
Trial completion date • Adverse events • Combination therapy • Metastases
|
EGFR (Epidermal growth factor receptor) • SEZ6 (Seizure Related 6 Homolog)
|
EGFR mutation • IDH wild-type • SEZ6 expression
|
cisplatin • carboplatin • budigalimab (ABBV-181) • ABBV-706
15d
Revisiting prognostic factors of gliomatosis cerebri in adult-type diffuse gliomas. (PubMed, J Neurooncol)
The prognosis of GC patients is determined by its underlying molecular type and patient performance status. Compared with diffuse glioma without GC, aggressive surgery of CE tumor in GC patients does not improve survival.
Journal
|
MGMT (6-O-methylguanine-DNA methyltransferase)
|
IDH wild-type
15d
MRI in High-Grade Glioma Patients Undergoing Chemoradiation (clinicaltrials.gov)
P=N/A, N=16, Recruiting, Wake Forest University Health Sciences | Trial completion date: May 2024 --> Dec 2024 | Trial primary completion date: May 2024 --> Dec 2024
Trial completion date • Trial primary completion date
|
IDH wild-type
17d
Exploiting Metabolic Defects in Glioma with Nanoparticle Encapsulated NAMPT Inhibitors. (PubMed, Mol Cancer Ther)
Finally, we show that CED of NP-encapsulated GMX1778 to NAPRT-silenced intracranial GBM xenografts in mice exhibit significant tumor growth delay and extends survival. These data support an approach to treat gliomas harboring defects in NAD+ metabolism using CED of NP-encapsulated NAMPTis to greatly improve the therapeutic index and treatment efficacy for this class of drugs.
Journal
|
NAMPT (Nicotinamide Phosphoribosyltransferase)
|
IDH wild-type
|
GMX1778
18d
Extent of Resection Thresholds in Molecular Subgroups of Newly Diagnosed Isocitrate Dehydrogenase-Wildtype Glioblastoma. (PubMed, Neurosurgery)
Our results suggest that a subset of molecularly defined GBM IDH-wildtype may benefit more from aggressive resections. Re-resections to optimize EOR might be beneficial in a subset of molecularly defined GBMs. Molecular alterations should be taken into consideration for surgical treatment decisions in GBM IDH-wildtype.
Journal
|
PTEN (Phosphatase and tensin homolog) • IDH1 (Isocitrate dehydrogenase (NADP(+)) 1) • IDH2 (Isocitrate Dehydrogenase (NADP(+)) 2)
|
IDH wild-type
18d
Sex-specific Differences in IDH1-Wildtype Glioblastoma patients in the ReSPOND Consortium. (PubMed, AJNR Am J Neuroradiol)
Our study demonstrates significant sex-based differences in clinical and radiological tumor parameters of glioblastoma, IDH1-WT, grade 4 patients. Sex is not an independent prognostic factor for survival outcomes and the tumor parameters influencing patient outcomes are identical for males and females.
Journal
|
IDH1 (Isocitrate dehydrogenase (NADP(+)) 1)
|
IDH wild-type
19d
OLA-TMZ-RTE-01: Phase I/IIa Study of Concomitant Radiotherapy With Olaparib and Temozolomide in Unresectable High Grade Gliomas Patients (clinicaltrials.gov)
P1/2, N=91, Recruiting, Centre Francois Baclesse | Trial completion date: Oct 2024 --> Mar 2025 | Trial primary completion date: Apr 2024 --> Sep 2024
Trial completion date • Trial primary completion date
|
IDH wild-type
|
Lynparza (olaparib) • temozolomide
20d
Methylthioadenosine phosphorylase and p16 as surrogate diagnostic markers for CDKN2A homozygous deletion in brain tumors (PubMed, Zhonghua Bing Li Xue Za Zhi)
MTAP could serve as a predictive surrogate for CDKN2A homozygous deletion in adult IDH-mutant astrocytoma, PXA, adult IDH-wildtype glioblastoma and meningioma. However, p16 could only be used in the first two tumor types, and its specificity and sensitivity are lower than that of MTAP.
Journal
|
CDKN2A (Cyclin Dependent Kinase Inhibitor 2A) • MTAP (Methylthioadenosine Phosphorylase)
|
CDKN2A deletion • IDH wild-type
20d
Supramaximal resection: retrospective study on IDH-wildtype Glioblastomas based on the new RANO-Resect classification. (PubMed, Acta Neurochir (Wien))
Results of the present study support the validity of supramaximal resection by the new RANO-Resect classification, also highlighting a possible surgical difference between tumors with methylated and unmethylated MGMT promoter.
Retrospective data • Journal
|
MGMT (6-O-methylguanine-DNA methyltransferase)
|
IDH wild-type
21d
Comparison of Glioblastoma Cell Culture Platforms Based on Transcriptional Similarity with Paired Tissue. (PubMed, Pharmaceuticals (Basel))
GBM TSs can be cultured via an easy-to-handle and cost- and time-efficient LM platform while preserving the transcriptional program of the originating tissues without supplementing the ECM or embedding it into the mouse brain. In addition to applications in basic cancer research, GBM TSs cultured in LM may also serve as patient avatars in drug screening and pre-clinical evaluation of targeted therapy and as standardized and clinically relevant models for precision medicine.
Preclinical • Journal
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IDH1 (Isocitrate dehydrogenase (NADP(+)) 1)
|
IDH wild-type
21d
High-Grade Glioma Recurrence Is Delayed in Hispanic Patients despite Severe Social Vulnerability: A Retrospective Cohort Study. (PubMed, Cancers (Basel))
Therefore, environmental factors, specifically social vulnerability, did not obscure the post-diagnosis benefits associated with Hispanic ethnicity. In future experiments, basic studies should be prioritized which investigate the cellular or genetic mechanisms underlying this ethnicity effect on HGG progression in the hopes of improving care for these devastating malignancies.
Retrospective data • Journal
|
IDH1 (Isocitrate dehydrogenase (NADP(+)) 1) • MGMT (6-O-methylguanine-DNA methyltransferase)
|
IDH wild-type
21d
The Roles of AGTRAP, ALKBH3, DIVERSIN, NEDD8 and RRM1 in Glioblastoma Pathophysiology and Prognosis. (PubMed, Biomedicines)
The combination AGTRAP/ALKBH3 had the strongest prognostic value for the OS of GBM patients. These findings contribute to a better understanding of the GBM pathophysiology and may help identify novel therapeutic targets in this type of cancer.
Journal
|
RRM1 (Ribonucleotide Reductase Catalytic Subunit M1)
|
IDH wild-type
21d
Isocitrate Dehydrogenase 1/2 Wildtype Adult Astrocytoma with WHO Grade 2/3 Histological Features: Molecular Re-Classification, Prognostic Factors, Clinical Outcomes. (PubMed, Biomedicines)
IDH-WT WHO grade 2/3 astrocytomas are a heterogeneous group of tumors with poor clinical outcomes. The majority can be reclassified as glioblastoma, based on current WHO classification criteria, but further understanding of the underlying biology of these tumors and the discovery of novel targeted agents are needed for better outcomes.
Clinical data • Journal
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EGFR (Epidermal growth factor receptor) • IDH1 (Isocitrate dehydrogenase (NADP(+)) 1) • TERT (Telomerase Reverse Transcriptase)
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EGFR mutation • EGFR amplification • TERT mutation • IDH wild-type
23d
Wild-type IDH2 is a therapeutic target for triple-negative breast cancer. (PubMed, Nat Commun)
Such metabolic double-hit results in ATP depletion and suppression of tumor growth, and renders TNBC cells more sensitive to doxorubicin treatment. Our study reveals a metabolic property of TNBC cells with active utilization of glutamine via reductive TCA metabolism, and suggests that wild-type IDH2 plays an important role in this metabolic process and could be a potential therapeutic target for TNBC.
Journal
|
IDH2 (Isocitrate Dehydrogenase (NADP(+)) 2) • HIF1A (Hypoxia inducible factor 1, alpha subunit)
|
IDH wild-type
|
doxorubicin hydrochloride
24d
Clinical and imaging characteristics of supratentorial slioma with IDH2 mutation. (PubMed, Neuroradiology)
A high frequency of oligodendrogliomas with 1p/19q codeletion was observed in IDH2-mutated gliomas. Younger age and the presence of the T2-FLAIR discordance were associated with IDH2 mutations and these findings may help with precise diagnoses and treatment decisions in clinical practice.
Journal
|
IDH1 (Isocitrate dehydrogenase (NADP(+)) 1) • IDH2 (Isocitrate Dehydrogenase (NADP(+)) 2)
|
IDH2 mutation • IDH wild-type
25d
CDPNet: a radiomic feature learning method with epigenetic application to estimating MGMT promoter methylation status in glioblastoma. (PubMed, Proc SPIE Int Soc Opt Eng)
Subsequently, the model's performance was evaluated on a distinct and previously unseen replication cohort of 38 patients. Our method achieved an accuracy of 70.11% and an area under the curve of 0.71 (95% CI: 0.65 - 0.74).
Journal
|
MGMT (6-O-methylguanine-DNA methyltransferase)
|
MGMT promoter methylation • IDH wild-type
25d
BCOR::CREBBP fusion in malignant neuroepithelial tumor of CNS expands the spectrum of methylation class CNS tumor with BCOR/BCOR(L1)-fusion. (PubMed, Acta Neuropathol Commun)
Based on our index case and the 35 cases found in the literature, we suggest the archetypical histological and molecular features of "CNS tumor with BCOR/BCOR(L1)-fusion". We also present four adult diffuse glioma cases including GBM, IDH-Wildtype and Astrocytoma, IDH-Mutant with CREBBP fusions and describe the necessity of complementary molecular analysis in "CNS tumor with BCOR/BCOR(L1)-alterations for securing a final diagnosis.
Journal
|
CREBBP (CREB binding protein) • BCOR (BCL6 Corepressor) • EP300 (E1A binding protein p300) • BCORL1 (BCL6 Corepressor Like 1)
|
IDH wild-type
26d
Molecular diversity in isocitrate dehydrogenase-wild-type glioblastoma. (PubMed, Brain Commun)
A successful glioblastoma management demands biomarker identification, combination therapies and a nuanced approach considering intratumoural variability. These advancements herald a transformative era in glioblastoma comprehension and treatment.
Review • Journal
|
EGFR (Epidermal growth factor receptor) • PTEN (Phosphatase and tensin homolog) • CDKN2A (Cyclin Dependent Kinase Inhibitor 2A) • PDGFRA (Platelet Derived Growth Factor Receptor Alpha)
|
EGFR expression • IDH wild-type • NF1 overexpression
28d
Identification of hypoxic macrophages in glioblastoma with therapeutic potential for vasculature normalization. (PubMed, Cancer Cell)
Accordingly, genetic ablation or pharmacological blockade of adrenomedullin produced by Hypoxia-TAM restores vascular integrity, improves intratumoral concentration of the anti-tumor agent dabrafenib, and achieves combinatorial therapeutic benefits. Increased proportion of Hypoxia-TAM or adrenomedullin expression is predictive of tumor vessel hyperpermeability and a worse prognosis of glioblastoma. Our findings highlight Mo-TAM diversity and spatial niche-steered Mo-TAM reprogramming in diffuse gliomas and indicate potential therapeutics targeting Hypoxia-TAM to normalize tumor vasculature.
Journal
|
ADM (Adrenomedullin)
|
IDH wild-type
|
Tafinlar (dabrafenib)
1m
Evaluation of Eflornithine Plus Temozolomide in Patients With Newly Diagnosed Glioblastoma (clinicaltrials.gov)
P1, N=66, Recruiting, Orbus Therapeutics, Inc. | Phase classification: P1b --> P1
Phase classification
|
IDH wild-type
|
temozolomide • eflornithine
1m
Molecular characterization and survival analysis of a cohort of glioblastoma, IDH-wildtype. (PubMed, Pathol Res Pract)
Multivariate analysis to account for the effect of MGMT promoter methylation and age showed that, in contrast to other published series, this cohort demonstrated improved survival for tumors harboring PTEN mutations, and that there was no observed difference for most other molecular alterations, including EGFR amplification, RB1 loss, or the coexistence of EGFR amplification and deletion/exon skipping (EGFRvIII). Despite limitations in sample size, this study contributes data to the molecular landscape of glioblastomas, prompting further investigations to examine these findings more closely in larger cohorts.
Journal
|
EGFR (Epidermal growth factor receptor) • PTEN (Phosphatase and tensin homolog) • CDKN2A (Cyclin Dependent Kinase Inhibitor 2A) • RB1 (RB Transcriptional Corepressor 1) • MGMT (6-O-methylguanine-DNA methyltransferase) • TERT (Telomerase Reverse Transcriptase) • mTOR (Mechanistic target of rapamycin kinase) • CDKN2B (Cyclin Dependent Kinase Inhibitor 2B) • MDM4 (The mouse double minute 4) • PI3K (Phosphoinositide 3-kinases)
|
TP53 mutation • EGFR amplification • PTEN mutation • MGMT promoter methylation • MTOR mutation • TERT mutation • IDH wild-type • TERT promoter mutation
1m
Efficacy of Personalized Postoperative Epilepsy Management in Patients with Glioblastoma Utilizing IDH1 Gene Assessment. (PubMed, Neuropsychiatr Dis Treat)
Furthermore, within the group of 15 patients with wild-type IDH1, 3 patients who received prophylactic antiepileptic drugs developed epilepsy, while 2 cases of epilepsy occurred among the 17 patients who did not receive prophylactic antiepileptic drugs, with no statistically significant difference (P > 0.05). In individuals with IDH1 mutant glioblastoma who have undergone surgical resection, the implementation of preventive antiepileptic therapy demonstrates a potential to diminish the occurrence of postoperative epilepsy.
Journal
|
IDH1 (Isocitrate dehydrogenase (NADP(+)) 1)
|
IDH1 mutation • IDH wild-type
1m
Association of ADC of hyperintense lesions on FLAIR images with TERT promoter mutation status in glioblastoma IDH wild type. (PubMed, Surg Neurol Int)
Histopathologic analysis indicated high tumor cell density in FHLs with low ADC. The ADC of FHLs was significantly lower in IDH-wild-type GBM with TERTp mutations, suggesting that determining the ADC of FHLs on preoperative MRI might be helpful in predicting TERTp mutation status and surgical planning.
Journal
|
TERT (Telomerase Reverse Transcriptase)
|
TERT mutation • IDH wild-type • TERT promoter mutation
1m
A Phase 1a/1b Study to Determine the Recommended Phase 2 Dose, of Tepotinib in Participants With MET Alterations and Brain Tumors (clinicaltrials.gov)
P1, N=0, Withdrawn, M.D. Anderson Cancer Center | N=60 --> 0 | Trial completion date: Dec 2025 --> Apr 2024 | Active, not recruiting --> Withdrawn | Trial primary completion date: Dec 2025 --> Apr 2024
Enrollment change • Trial completion date • Trial withdrawal • Trial primary completion date
|
MET (MET proto-oncogene, receptor tyrosine kinase)
|
EGFR mutation • EGFR T790M • MET exon 14 mutation • IDH wild-type
|
Tagrisso (osimertinib) • Tepmetko (tepotinib)
1m
Enrollment open • Tumor mutational burden
|
TMB (Tumor Mutational Burden) • CD4 (CD4 Molecule)
|
TMB-H • IDH wild-type
|
Tecentriq (atezolizumab)
1m
New trial
|
TERT mutation • IDH wild-type
1m
Pediatric-type high-grade gliomas with PDGFRA amplification in adult patients with Li-Fraumeni syndrome: clinical and molecular characterization of three cases. (PubMed, Acta Neuropathol Commun)
These data suggest that high-grade gliomas developed in adult patients with LFS may be involved in pHGG H3-/IDH-wt. PDGFRA and homozygous alterations in TP53 may play pivotal roles in the development of this type of glioma in adult patients with LFS.
Journal
|
EGFR (Epidermal growth factor receptor) • TP53 (Tumor protein P53) • IDH1 (Isocitrate dehydrogenase (NADP(+)) 1) • IDH2 (Isocitrate Dehydrogenase (NADP(+)) 2) • PDGFRA (Platelet Derived Growth Factor Receptor Alpha) • TERT (Telomerase Reverse Transcriptase)
|
TP53 mutation • EGFR mutation • EGFR amplification • TERT mutation • IDH wild-type • TERT promoter mutation • PDGFR wild-type
1m
PRIDE: Protective VEGF Inhibition for Isotoxic Dose Escalation in Glioblastoma (clinicaltrials.gov)
P2, N=146, Recruiting, Ludwig-Maximilians - University of Munich | Not yet recruiting --> Recruiting | Phase classification: P2a --> P2 | Trial completion date: Jan 2027 --> Jul 2027 | Initiation date: Oct 2023 --> Apr 2024 | Trial primary completion date: Oct 2026 --> Apr 2027
Enrollment open • Phase classification • Trial completion date • Trial initiation date • Trial primary completion date
|
MGMT (6-O-methylguanine-DNA methyltransferase)
|
IDH wild-type
|
Avastin (bevacizumab)
1m
Metabologenomic characterization uncovers a clinically aggressive IDH mutant glioma subtype. (PubMed, Acta Neuropathol)
IDH-mutant gliomas with altered metabolism have significantly shorter overall survival from their IDH mutant counterparts that is not fully accounted for by recognized molecular prognostic markers of CDKN2A/B loss and glioma CpG Island Methylator Phenotype (GCIMP) status. IDH-mutant tumors with dysregulated metabolism harbored distinct epigenetic alterations that converged to drive proliferative and stem-like transcriptional profiles, providing a window to target novel dependencies in gliomas.
Journal
|
CDKN2A (Cyclin Dependent Kinase Inhibitor 2A) • CDKN2B (Cyclin Dependent Kinase Inhibitor 2B)
|
IDH wild-type
1m
Age-stratified comorbid and pharmacologic analysis of patients with glioblastoma. (PubMed, Brain Behav Immun Health)
Both groups had worse survival with confusion/altered mental status (P = 0.023 vs < 0.000) and an improved survival with a Temozolomide prescription...Age-dependent novel associations between clinical symptoms and medications prescribed for co-morbid conditions were demonstrated in patients with GBM. The results of the current work support future mechanistic studies that investigate the negative relationship(s) between increased age, comorbidities, and drug therapies for differential clinical decision-making across the lifespan of patients with GBM.
Journal
|
MGMT (6-O-methylguanine-DNA methyltransferase)
|
MGMT promoter methylation • IDH wild-type
|
temozolomide
1m
CLINGLIO: LAM561 With RT and TMZ for Adults With Glioblastoma (clinicaltrials.gov)
P2/3, N=140, Recruiting, Laminar Pharmaceuticals | Trial primary completion date: Feb 2024 --> Oct 2024
Trial primary completion date • Combination therapy
|
IDH1 (Isocitrate dehydrogenase (NADP(+)) 1) • MGMT (6-O-methylguanine-DNA methyltransferase)
|
MGMT promoter methylation • IDH wild-type
|
temozolomide • Minerval (2-hydroxyoleic acid)
1m
Clinical roles of EGFR amplification in diffuse gliomas: a real-world study using the 2021 WHO classification of CNS tumors. (PubMed, Front Neurosci)
EGFR Amp did not stratify overall survival (OS) in IDH-mutant diffuse gliomas and astrocytoma, while was significantly associated with poorer OS in IDH-wildtype diffuse gliomas, histologic grade 2 and 3 IDH-wildtype diffuse astrocytic gliomas and GBM. Our study validated EGFR Amp as a diagnostic marker for GBM and still a useful predictor for shortened OS in this group.
Journal • Real-world evidence • Real-world
|
EGFR (Epidermal growth factor receptor)
|
EGFR amplification • IDH wild-type
1m
Quantitative assessment of preanalytic variables on clinical evaluation of PI3/AKT/mTOR signaling activity in diffuse glioma. (PubMed, Mod Pathol)
First, we determined the impact of delayed time-to-formalin fixation, or cold ischemia time (CIT), on the quantitative assessment of cellular expression of six phosphoproteins that are readouts of PI3K/AK/mTOR activity (phosphorylated -proline-rich Akt substrate of 40 kDa (p-PRAS40, T246), -mechanistic target of rapamycin (p-mTOR; S2448); -AKT (p-AKT, S473); -ribosomal protein S6 (p-RPS6, S240/244 and S235/236), and -eukaryotic initiation factor 4E-binding protein 1 (p-4EBP1, T37/46)...Quantification of p-RPS6 (240/244) expression in multiple regionally distinct human tumor samples from eight patients revealed significant intratumoral heterogeneity. Thus, the accurate assessment of PI3K/AKT/mTOR signaling in diffuse glioma must overcome intratumoral heterogeneity and multiple preanalytic factors, including time-to-formalin fixation, slide storage conditions, and phosphoprotein of interest.
Journal
|
EIF4EBP1 (Eukaryotic translation initiation factor 4E binding protein 1) • RPS6 (Ribosomal Protein S6) • AKT1S1 (AKT1 Substrate 1)
|
IDH wild-type
|
sirolimus