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  • 1
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    LGG-41. The clinical and molecular landscape of gliomas in adolescents and young adults
    Oxford University Press (OUP) ; 2022
    In:  Neuro-Oncology Vol. 24, No. Supplement_1 ( 2022-06-03), p. i97-i97
    Details
    In: Neuro-Oncology, Oxford University Press (OUP), Vol. 24, No. Supplement_1 ( 2022-06-03), p. i97-i97
    Abstract: OBJECTIVE: Gliomas in adolescents and young adults (AYA) are commonly treated with a standard chemo-radiation approach based on data from adults. The clinical impact of paediatric-type alterations in these tumours is unknown. METHODS: We compiled a multi-institutional cohort of patients diagnosed with glioma between 15-39.9 years over 20 years. Complete molecular analysis, therapeutic data and outcome was collected. For specific alterations, analysis included patients aged 0-39.9 years. RESULTS: A total of 1900 patients with 876 AYA gliomas were included. Ongoing analysis reveals genetic alterations in 95% of available tumours. IDH-mutant tumours account for only 53%, while paediatric-type mutations were found in 35% of AYA tumours with IDH-WT GBM accounting for the remaining 12%. The most common paediatric alterations in AYAs included BRAF p.V600E (11%) and FGFR alterations (6%) while BRAF fusions, H3 p.K27M and H3.3 p.G34R were rarely observed (4%, 4% and 1% respectively). BRAF fused tumours with non-canonical binding partners were enriched in AYAs. Analysis of BRAF-V600E gliomas between ages 0-40 revealed increased tendency for malignant tumours in patients & gt;20 years suggesting malignant transformation possibly due to higher rate of secondary hits including TP53, CDKN2A and ATRX mutations. This resulted in worse overall-survival for AYA patients with BRAF-V600E glioma when compared to children under 20 years (p=0.0032). Ten-year OS of 100%, 90% and 95% was seen for BRAF fused, BRAF-V600E and FGFR-altered AYA low grade glioma respectively, compared to 14% and 25% for BRAF-V600E and FGFR-altered high grade glioma. In contrast, continuous decline was observed in the IDH-mutant gliomas with 10-year OS of 50% which declined to 29% at 15 years. CONCLUSIONS: Gliomas in AYA are enriched for paediatric-type alterations with distinct molecularly-based outcomes. As these tumours carry different outcomes than childhood glioma and may respond to targeted inhibitors, AYA gliomas would benefit from comprehensive diagnostic and therapeutic approaches.
    Type of Medium: Online Resource
    ISSN: 1522-8517 , 1523-5866
    URL: Article
    DOI: 10.1093/neuonc/noac079.353
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
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  • 2
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    IMMU-20. IMMUNE AND TUMOR BIOMARKERS OF OUTCOME IN REPLICATION REPAIR DEFICIENT BRAIN TUMORS TREATED WITH IMMUNE CHECKPOINT INHIBITORS: UPDATES FROM THE INTERNATIONAL REPLICATION REPAIR DEFICIENCY CONSORTIUM
    Oxford University Press (OUP) ; 2019
    In:  Neuro-Oncology Vol. 21, No. Supplement_2 ( 2019-04-23), p. ii96-ii97
    Details
    In: Neuro-Oncology, Oxford University Press (OUP), Vol. 21, No. Supplement_2 ( 2019-04-23), p. ii96-ii97
    Type of Medium: Online Resource
    ISSN: 1522-8517 , 1523-5866
    URL: Article
    DOI: 10.1093/neuonc/noz036.139
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2019
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  • 3
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    Using comprehensive genomic and functional analyses for resolving genotype–phenotype mismatches in children with suspected CMMRD in Lebanon: an IRRDC study
    Springer Science and Business Media LLC ; 2023
    In:  Human Genetics Vol. 142, No. 4 ( 2023-04), p. 563-576
    Details
    In: Human Genetics, Springer Science and Business Media LLC, Vol. 142, No. 4 ( 2023-04), p. 563-576
    Type of Medium: Online Resource
    ISSN: 0340-6717 , 1432-1203
    URL: Article
    DOI: 10.1007/s00439-023-02530-8
    RVK:
    WA 15000
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 1459188-1
    SSG: 12
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  • 4
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    EPID-25. THE CLINICAL AND MOLECULAR LANDSCAPE OF GLIOMAS IN ADOLESCENTS AND YOUNG ADULTS
    Oxford University Press (OUP) ; 2022
    In:  Neuro-Oncology Vol. 24, No. Supplement_7 ( 2022-11-14), p. vii115-vii115
    Details
    In: Neuro-Oncology, Oxford University Press (OUP), Vol. 24, No. Supplement_7 ( 2022-11-14), p. vii115-vii115
    Abstract: Gliomas in adolescents and young adults (AYA) are commonly treated with a standard chemo-radiation approach. Molecular alterations have not been comprehensively described to date. METHODS We compiled a multi-institutional cohort of patients diagnosed with glioma between 15-39.9 years over 20 years. Molecular analysis, therapeutic data and outcome was collected. For specific alterations, analysis included patients aged 0-39.9 years. RESULTS A total of 1900 patients with 876 AYA gliomas were included. Ongoing analysis reveals genetic alterations in 95% of available tumours. IDH p.R132H was found in 49% of tumours, while non-canonical IDH mutations were found in 7%. Paediatric-type mutations were found in 33% of AYA tumours with IDH-WT GBM accounting for the remaining 11%. The most common paediatric alterations in AYAs included BRAF p.V600E (11%) and FGFR alterations (7%) while BRAF fusions, H3 p.K27M and H3.3 p.G34R were rarely observed (4%, 4% and 1% respectively). BRAF fused tumours with non-canonical binding partners were enriched in AYAs. Analysis of BRAF-V600E gliomas between ages 0-40 revealed increased tendency for malignant tumours in patients & gt; 20 years suggesting malignant transformation possibly due to higher rate of secondary hits. This resulted in worse overall-survival for AYA patients with BRAF-V600E glioma when compared to children under 20 years (p=0.0032). Ten-year OS of 100%, 90% and 95% was seen for BRAF fused, BRAF-V600E and FGFR-altered AYA low grade glioma respectively, compared to 14% and 25% for BRAF-V600E and FGFR-altered high grade glioma. In contrast, continuous decline was observed in the IDH-mutant gliomas with 10-year OS of 50% which declined to 29% at 15 years. CONCLUSIONS Gliomas in AYA often have non-canonical alterations that may evade standard molecular analysis. They are enriched for paediatric-type alterations with distinct molecularly-based outcomes. These tumours may respond to targeted inhibitors and would benefit from comprehensive diagnostic and therapeutic approaches.
    Type of Medium: Online Resource
    ISSN: 1522-8517 , 1523-5866
    URL: Article
    DOI: 10.1093/neuonc/noac209.435
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
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  • 5
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    DNAR-09. THE IMPACT OF MISMATCH REPAIR DEFICIENCY ON HIGH GRADE GLIOMAS IN CHILDREN, ADOLESCENTS AND YOUNG ADULTS; A REPORT FROM THE IRRDC AND THE GLIOMA TASKFORCE
    Oxford University Press (OUP) ; 2022
    In:  Neuro-Oncology Vol. 24, No. Supplement_7 ( 2022-11-14), p. vii92-vii92
    Details
    In: Neuro-Oncology, Oxford University Press (OUP), Vol. 24, No. Supplement_7 ( 2022-11-14), p. vii92-vii92
    Abstract: Mismatch repair deficiency (MMRD) is a pan-cancer mechanism resulting in universal hypermutation and aggressive cancers that are resistant to chemoradiation yet sensitive to immunotherapy. MMRD mutations can occur somatically or be inherited as a part of Lynch Syndrome or Constitutional Mismatch Repair Deficiency (CMMRD). Although MMRD affects children, adolescents and young adults (CAYA, ages 0-40) with gliomas, its prevalence and impact of germline inheritance is unknown. Given that high microsatellite instability (MSI) is a key characteristic of MMRD, we previously developed a robust low-coverage whole genome-based tool to quantify MSI, which allows for accurate MMRD detection. We are therefore performing a large-scale MMRD screen of CAYA high grade gliomas (HGGs) and utilizing data from the International Replication Repair Deficiency Consortium (IRRDC) to determine the impact of germline mutations in MMRD gliomas. Ongoing data on 346 HGGs from CAYA patients reveals that MMRD is identified in 6% of HGGs and is not present in tumors with pediatric type alterations. Moreover, of MMRD tumors with IDH1 mutations, none harbor 1p/19q co-deletions. Of patients with available information, all are diagnosed with Lynch Syndrome (69%) or CMMRD (31%), with all Lynch Syndrome diagnoses occurring in patients above 18 years of age. Complementary data from the IRRDC on 113 MMRD patients with gliomas reveal that the median age of glioma is 9.7 and 17.5 years in CMMRD and Lynch Syndrome, respectively (p & lt; 0.001). Strikingly, CMMRD gliomas are enriched for secondary polymerase mutations (60%, p & lt; 0.001) and exhibit ultra-hypermutation, while MMRD gliomas with Lynch Syndrome are enriched for IDH1 mutations (32%, p & lt; 0.025) and harbor a lower mutational burden. Our data reveal a high prevalence of MMRD in CAYA HGGs with alarming impact of germline predisposition. These data can support universal screening for MMRD in high grade glioma diagnostics and identify patients for precision therapeutics.
    Type of Medium: Online Resource
    ISSN: 1522-8517 , 1523-5866
    URL: Article
    DOI: 10.1093/neuonc/noac209.341
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2022
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  • 6
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    HGG-26. GENOMIC AND IMMUNE ANALYSIS OF PRIMARY REPLICATION-REPAIR DEFICIENT (RRD) GLIOMAS REVEALS THREE SUBGROUPS WITH DISTINCT DRIVERS AND RESPONSE TO IMMUNOTHERAPY: AN IRRDC REPORT
    Oxford University Press (OUP) ; 2023
    In:  Neuro-Oncology Vol. 25, No. Supplement_1 ( 2023-06-12), p. i45-i45
    Details
    In: Neuro-Oncology, Oxford University Press (OUP), Vol. 25, No. Supplement_1 ( 2023-06-12), p. i45-i45
    Abstract: Replication-repair deficiency (RRD) caused by germline/somatic defects in mismatch repair (MMRD) and/or polymerase-proofreading genes (PPD) drives 5-10% of gliomas in children, adolescents, and young adults (CAYA). Although RRD-gliomas harbour high mutation-burden (TMB), the basis of their heterogenous biology, clinical behavior, and response to immune-checkpoint inhibitors (ICI) is unknown. METHODS We analyzed the genome (whole exome, low-coverage genome), methylome, transcriptome (bulk, single-nuclei), and the immune-microenvironment of RRD-gliomas in a large cohort of IRRDC patients and correlated these with clinical outcomes and response to ICI. RESULTS Gliomas in 202 CAYA-patients uniformly harbored hypermutation and genomic microsatellite-instability. Median TMB was 297-mutations/megabase, with frequent mutations in TP53 (90%), ATRX (85%), RAS/MAPK (80%) and IDH1/2 (15%). MMRD (but not PPD) mutational signatures contributed to the enrichment of driver mutations in POLE, IDH1, and TP53 while common pediatric mutations (K27M, G34R/V and BRAF;p.V600E) not driven by MMRD signatures were absent. Paired analyses suggested acquisition of novel variants driven by the mutational signatures that also impacted the immune microenvironment. Multi-omic analyses classified RRD-gliomas into three subgroups: RRD1 (MMRD+PPD; 60%), RRD2 (MMRD-only; 23%), and RRD3 (MMRD+IDH1/2; 16%). All RRD1-gliomas were glioblastomas with earlier age of onset, enrichment in CMMRD, arose at diverse locations including the posterior-fossa, classified in proximity to methylation-RTK1-subclass, exhibited balanced copy number profiles, harbored the highest TMB (median: 409-mutations/megabase), and immunogenic PPD signatures. Conversely, RRD3-gliomas were frequent in Lynch syndrome, presented at an older age, with predominant localization in the forebrain, more complex genomic instability, clustered in proximity to IDH1-gliomas, and harbored lower TMB (median: 33-mutations/megabase). RRD1-gliomas revealed the highest immune infiltrates with significantly improved median post-ICI survival of 52-months versus & lt;12-months for RRD2/3 (p & lt;0.0001). CONCLUSIONS The distinct genomic subgroups of RRD-gliomas can explain their diverse clinical outcomes, highlighting the need for developing subgroup-specific, immune-directed treatment approaches for these patients.
    Type of Medium: Online Resource
    ISSN: 1522-8517 , 1523-5866
    URL: Article
    DOI: 10.1093/neuonc/noad073.175
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2023
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  • 7
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    IMMU-18. FAVORABLE OUTCOME IN REPLICATION REPAIR DEFICIENT HYPERMUTANT BRAIN TUMORS TO IMMUNE CHECKPOINT INHIBITION: AN INTERNATIONAL RRD CONSORTIUM REGISTRY STUDY
    Oxford University Press (OUP) ; 2020
    In:  Neuro-Oncology Vol. 22, No. Supplement_3 ( 2020-12-04), p. iii363-iii363
    Details
    In: Neuro-Oncology, Oxford University Press (OUP), Vol. 22, No. Supplement_3 ( 2020-12-04), p. iii363-iii363
    Abstract: Pediatric brain tumors with replication repair deficiency (RRD) are hypermutant and may respond to immune checkpoint inhibition (ICI). We performed a consortium registry study of ICI in recurrent RRD cancers. Clinical and companion biomarkers were collected longitudinally on all patients. Biomarkers included tumor mutational burden (TMB), neoantigens and genetic signatures obtained from whole genome and exome sequencing. Immune inference was obtained by RNAseq and T cell rearrangement was collected in the tumor and in blood throughout treatment. Of the 46 tumors on the study, 32 were brain tumors with glioblastoma in 96%. Rapid, objective responses ( & gt;50%) were observed in 50% of glioblastomas. Three year overall survival for the whole cohort was 48+/-8% which compares favorably with historical controls. Brain tumors fared worse with OS of 39+/-10% and late recurrences observed even after 2 years of therapy (p=0.02). Tumor size and acute “flare” constitute poor outcome throughout all cancers. While all tumors are hypermutant, TMB and predicted neoantigens correlated with response to ICI (p=0.02). Specific signatures extracted from SNVs and total mutations predicted response to ICI and favorable outcome (p=0.005). RNA inference and TCR reveal that the FLARE phenotype is mostly acute nonspecific immune response and not true progression. Finally, glioblastomas (n=8) which failed single agent ICI had favorable responses to combinational immunotherapies with prolonged survival of 65%+/-8% at one year after failure vs 0 for other patients (p=0.01). RRD glioblastomas exhibit favorable outcome and responses to ICI. Combinational therapies based on tumor and immune signatures of these cancers are necessary.
    Type of Medium: Online Resource
    ISSN: 1522-8517 , 1523-5866
    URL: Article
    DOI: 10.1093/neuonc/noaa222.374
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
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  • 8
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    Genomic Microsatellite Signatures Identify Germline Mismatch Repair Deficiency and Risk of Cancer Onset
    American Society of Clinical Oncology (ASCO) ; 2023
    In:  Journal of Clinical Oncology Vol. 41, No. 4 ( 2023-02-01), p. 766-777
    Details
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 41, No. 4 ( 2023-02-01), p. 766-777
    Abstract: Diagnosis of Mismatch Repair Deficiency (MMRD) is crucial for tumor management and early detection in patients with the cancer predisposition syndrome constitutional mismatch repair deficiency (CMMRD). Current diagnostic tools are cumbersome and inconsistent both in childhood cancers and in determining germline MMRD. PATIENTS AND METHODS We developed and analyzed a functional Low-pass Genomic Instability Characterization (LOGIC) assay to detect MMRD. The diagnostic performance of LOGIC was compared with that of current established assays including tumor mutational burden, immunohistochemistry, and the microsatellite instability panel. LOGIC was then applied to various normal tissues of patients with CMMRD with comprehensive clinical data including age of cancer presentation. RESULTS Overall, LOGIC was 100% sensitive and specific in detecting MMRD in childhood cancers (N = 376). It was more sensitive than the microsatellite instability panel (14%, P = 4.3 × 10 −12 ), immunohistochemistry (86%, P = 4.6 × 10 −3 ), or tumor mutational burden (80%, P = 9.1 × 10 −4 ). LOGIC was able to distinguish CMMRD from other cancer predisposition syndromes using blood and saliva DNA ( P 〈 .0001, n = 277). In normal cells, MMRDness scores differed between tissues (GI 〉 blood 〉 brain), increased over time in the same individual, and revealed genotype-phenotype associations within the mismatch repair genes. Importantly, increased MMRDness score was associated with younger age of first cancer presentation in individuals with CMMRD ( P = 2.2 × 10 −5 ). CONCLUSION LOGIC was a robust tool for the diagnosis of MMRD in multiple cancer types and in normal tissues. LOGIC may inform therapeutic cancer decisions, provide rapid diagnosis of germline MMRD, and support tailored surveillance for individuals with CMMRD.
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
    URL: Article
    DOI: 10.1200/JCO.21.02873
    RVK:
    XA 52760
    RVK:
    XA 10000
    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2023
    detail.hit.zdb_id: 2005181-5
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  • 9
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    Modifiable lifestyle behaviours impact the health‐related quality of life of bladder cancer survivors
    Wiley ; 2020
    In:  BJU International Vol. 125, No. 6 ( 2020-06), p. 836-842
    Details
    In: BJU International, Wiley, Vol. 125, No. 6 ( 2020-06), p. 836-842
    Abstract: To examine health behaviours in bladder cancer survivors including physical activity (PA), body mass index, diet quality, smoking and alcohol consumption, and to explore their relationship with health‐related quality of life (HRQoL). Subjects/Patients and Methods Cross‐sectional questionnaire packages were distributed to bladder cancer survivors (muscle‐invasive bladder cancer [MIBC] and non‐muscle‐invasive bladder cancer [NMIBC] ) aged 〉 18 years, and proficient in English. Lifestyle behaviours were measured using established measures/questions, and reported using descriptive statistics. HRQoL was assessed using the validated Bladder Utility Symptom Scale, and its association with lifestyle behaviours was evaluated using analysis of covariance ( ancova ) and multivariate regression analyses. Results A total of 586 participants completed the questionnaire (52% response rate). The mean (SD) age was 67.3 (10.2) years, and 68% were male. PA guidelines were met by 20% ( n  = 117) and 22.7% ( n  = 133) met dietary guidelines. In all, 60.9% ( n  = 357) were overweight/obese, and the vast majority met alcohol recommendations ( n  = 521, 92.5%) and were current non‐smokers ( n  = 535, 91.0%). Health behaviours did not differ between MIBC and NMIBC, and cancer treatment stages. Sufficient PA, healthy diet, and non‐smoking were significantly associated with HRQoL, and the number of health behaviours participants engaged in was positively associated with HRQoL ( P   〈  0.001). Conclusion Bladder cancer survivors are not meeting guidelines for important lifestyle behaviours that may improve their overall HRQoL. Future research should investigate the impact of behavioural and educational interventions for health behaviours on HRQoL in this population.
    Type of Medium: Online Resource
    ISSN: 1464-4096 , 1464-410X
    URL: Issue
    URL: Article
    DOI: 10.1111/bju.v125.6
    DOI: 10.1111/bju.15007
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2019983-1
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  • 10
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    BIOL-18. NEWLY DEVELOPED REPLICATION REPAIR DEFICIENT (RRD) MOUSE MODELS PROVIDE INSIGHTS INTO MEDULLOBLASTOMA/GLIOMAGENESIS AND RESPONSE TO IMMUNOTHERAPY
    Oxford University Press (OUP) ; 2023
    In:  Neuro-Oncology Vol. 25, No. Supplement_1 ( 2023-06-12), p. i9-i10
    Details
    In: Neuro-Oncology, Oxford University Press (OUP), Vol. 25, No. Supplement_1 ( 2023-06-12), p. i9-i10
    Abstract: Replication Repair Deficiency (RRD), caused by germline monoallelic (Lynch Syndrome) or biallelic (Constitutional Mismatch Repair Deficiency, CMMRD) mutations in MMR genes, is present in 5-10% of glioblastomas in children, adolescents, and young adults. RRD glioblastomas are chemoradiation-resistant, but respond favorably to immune checkpoint inhibition (ICI). Representative immunocompetent animal models are urgently needed for 3 recently identified subgroups based on specific somatically-acquired mutations, survival, and immunotherapy response (RRD1: MMRD with POLE mutations, RRD2: MMRD associated with TP53 mutations, and RRD3: MMRD harboring IDH1 mutations). Using germline mutations and brain-specific Cre-drivers, we genetically engineered mouse models that recapitulate each human RRD-subgroup. RRD1 (Nestin- and Olig2-Cre+/ Msh2LoxP/LoxP/PoleS459F/+ and LSL-PoleP286R/+): CMMRD-like Nestin-Cre-driven mice develop posterior-fossa glioma-like or medulloblastoma (MB)-like tumors at ~2.7 months. Olig2-Cre-driven mice display hemispheric gliomas at ~10 months, suggesting distinct cell-of-origin. RRD2 (Nestin-Cre+/Trp53LoxP/LoxP and Msh2LoxP/LoxP or Mlh1-/-): CMMRD-like tumors develop in heterogenous locations at ~4.5 months (p & lt;0.0001), classifying primarily as MB-like in hindbrain, and glioma-like in other brain regions. Strikingly, germline Mlh1 tumors occur earlier than Nestin-Cre-driven RRD2 tumors, indicating early developmental mutation accumulation in CMMRD-patients. Lynch-like RRD1/2 mice succumb exclusively to gliomas & gt;13 months (p & lt;0.0001). RRD3 (Olig2-Cre+/Msh2LoxP/LoxP/Trp53LoxP/LoxP/LSL-Idh1R132H/+): brain tumors occur later and are hemispheric. These observations recapitulate human data, where CMMRD-patients develop glioblastoma/MB earlier than Lynch-patients (8.6 vs. 14-years; p & lt;0.0001), and posterior-fossa glioblastoma/MB presents earlier than hemispheric gliomas (p=0.04). Additionally, tumor onset and location vary (RRD1: 7.6-years, RRD2: 8.3-years, hemispheric/posterior-fossa; RRD3: 12-years, hemispheric; p=0.005). In both mice and humans, RRD1 exhibits ultra-hypermutation, high immune infiltration, and response to ICI, whereas RRD2 harbors lower mutational burden, are immune-cold, and ICI-monotherapy resistant. Temporal dynamics of RRD tumor development is currently being tracked by serial MRI to define biologically relevant time points. Our models accurately mimic the human condition and provide unique insights into RRD tumorigenesis, allowing optimization of subgroup-tailored therapeutic approaches.
    Type of Medium: Online Resource
    ISSN: 1522-8517 , 1523-5866
    URL: Article
    DOI: 10.1093/neuonc/noad073.037
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2023
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