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  • Medicine  (13)
  • XA 52760  (13)
  • 1
    Online Resource
    Online Resource
    American Society of Clinical Oncology (ASCO) ; 2018
    In:  Journal of Clinical Oncology Vol. 36, No. 15_suppl ( 2018-05-20), p. e15012-e15012
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 36, No. 15_suppl ( 2018-05-20), p. e15012-e15012
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
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    RVK:
    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2018
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  • 2
    Online Resource
    Online Resource
    American Society of Clinical Oncology (ASCO) ; 2020
    In:  Journal of Clinical Oncology Vol. 38, No. 15_suppl ( 2020-05-20), p. 3124-3124
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 38, No. 15_suppl ( 2020-05-20), p. 3124-3124
    Abstract: 3124 Background: Recognition of tumor neoantigen is the key to generating immune response. The expression and integrity of human leukocyte antigen (HLA) are the prerequisites for neoantigen presentation, and loss of heterozygosity in HLA (HLA LOH) may facilitate immune evasion. However, the incidence of HLA LOH in Chinese cancer patients is unknown. Methods: In this study, 45 samples sequenced with both 1021-gene panel and whole-exome sequencing(WES) were used to evaluate the consistency of HLA LOH in the two testing strategies. The prevalence of HLA LOH analysis was performed in 1546 advanced patients across 10 diverse cancer types and 114 early-stage lung cancer patients who had undergone tumor profiling using 1021-gene panel. Exon 2, exon 3 and bilateral introns of HLA-A/B/C genes were well covered in 1021-gene panel. HLA LOH were analysis using LOHHLA algorithm (McGranahan, et al. 2017). Results: In the HLA LOH analysis of 45 samples, the consistency of 1021-gene panel and WES was 95.6% (43/45). Among the 1660 samples, 1.3% (21) were detected as HLA homozygous at all of the three site. HLA LOH was found in 45.1%(697/1546) of all the advanced patients, range from 24.1% to 59.7%. In colorectal cancer, the HLA LOH ratio of MSS samples was significantly higher than that of MSI-H samples (46.2%, 61/132 vs 16.7%, 3/18 p =0.0214). For NSCLC, the proportion of HLALOH in early-stage (I-IIIa) lung adenocarcinoma and lung squamous cell carcinoma was 25.7% (18/70) and 65.9% (29/44), respectively, consistent with the report. However, advanced (IIIa-IV) lung adenocarcinoma and lung squamous cell carcinoma were 49.4%(168/340) and 58.7%(179/305), respectively. The reason for the difference between early-stage lung adenocarcinoma and advanced lung adenocarcinoma needs further study. In 43.8% of cases (326/744), LOH occurred simultaneously in HLA-A, B and C,suggesting that the Class I locus was often lost together. Conclusions: We can use multi-gene panel for HLA LOH analysis, provided that the relevant regions are well captured. The prevalenceof HLA LOHpresent differences among cancer types.Understanding these distributions may provide more information for immunotherapy research. [Table: see text]
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2020
    detail.hit.zdb_id: 2005181-5
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  • 3
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 36, No. 15_suppl ( 2018-05-20), p. 1545-1545
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2018
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  • 4
    Online Resource
    Online Resource
    American Society of Clinical Oncology (ASCO) ; 2019
    In:  Journal of Clinical Oncology Vol. 37, No. 15_suppl ( 2019-05-20), p. 8538-8538
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 37, No. 15_suppl ( 2019-05-20), p. 8538-8538
    Abstract: 8538 Background: Neoantigens arise from tumor-specific mutations and potentially provoke immune responses. General vaccines targeting these peptides could be beneficial for patients suffering from common cancers, like lung cancer. Therefore, a retrospective analysis was performed on 799 non-small cell lung cancer (NSCLC) tissue samples previously profiled using our 1021-gene panel. Each sample was collected from a unique patient, from whom peripheral blood or normal tissue was also obtained as control. Methods: Sequencing data were generated and pre-analyzed according to our in-house procedures. HLA typing was done using OptiType v1.0 (required sequences were captured by 1021-gene panel) and neoantigens were predicted by netMHCpan v4.0 based on typed HLA alleles and curated non-frameshift somatic mutations with frequency 〉 5%, which were called in pre-analysis. A neoantigen is considered mutant-specific if IC 50 mut is 〈 500 nM and IC 50 wild is 〉 500 nM, and especially, it is considered a strong-binder if IC 50 mut is 〈 50 nM. Results: HLA typing returned 141 unique alleles, with the top 3 by carrier frequency being A*1101 (39%), C*0102 (33%) and A*2402 (28%). A further investigation into HLA alleles, mutations and neoantigens revealed two mutations on EGFR as candidates for off-the-shelf vaccine development: (1) L858R mutation (19%, 151 out of 799) and (2) E746_A750del mutation (13%, 106 out of 799). Among the four neoantigens derived from EGFR L858R mutation is HVKITDFGR, which can be recognized by A*3303 (IC 50 mut = 22.93 nM and IC 50 wild = 12,733.96 nM) and the combination is shared by 3% of the patients (23 out of 799), despite that A*3303 is not a very frequent allele in this population (16%, 127 out of 799). Two neoantigens were derived from EGFR E746_A750del mutation, including IPVAIKTSPK, which is mainly recognized by A*1101 (IC 50 mut = 158.16 nM and IC 50 wild = 31,132.66 nM). This combination is shared by 5% of the patients (41 out of 799). Conclusions: (1) EGFR L858R mutation and HLA-A*3303 could be a good target for individual-independent vaccine development. (2) HLA-A*1101 is the most frequent allele in this population. However, HLA-A*1101 and E746_A750del mutation is not so ideal for off-the-shelf vaccine development.
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2019
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  • 5
    Online Resource
    Online Resource
    American Society of Clinical Oncology (ASCO) ; 2021
    In:  Journal of Clinical Oncology Vol. 39, No. 15_suppl ( 2021-05-20), p. e14521-e14521
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 39, No. 15_suppl ( 2021-05-20), p. e14521-e14521
    Abstract: e14521 Background: Human leukocyte antigen (HLA) molecules are essential components involved in tumor antigen presentation. Loss of heterozygosity in HLA (HLA LOH) may facilitate tumor immune evasion. However, the large population study of HLALOH in Chinese pan-cancer patients remains to be explored. Methods: In this study, analysis were performed in 1504 advanced patients across 12 cancer types and 134 early-stage NSCLC patientsusing a 1021-gene panel. HLA LOH were analysis using LOHHLA algorithm. The consistency between target sequencing by 1021-gene panel and whole-exome sequencing (WES) was evaluated in 45 samples. Results: In 45 samples processed with both approaches, 95.6% (43/45) obtained concordant results. Among the 1638 patients, 24 were excluded due to homozygosity at all three HLA-Iloci. The prevalence of HLALOH in advanced patients presented considerable differences among cancer typeswith an average incidence of 45.6% (676/1482), ranging from 12.2% (prostate adenocarcinoma) to 68.0% (cervical squamous cell carcinoma). In NSCLC patients, there was an enrichment of HLALOH in both early-stage (I-IIIa) LUSC (24/88 [27.3%] of LUAD vs. 26/42 [61.9%] of LUSC, p 〈 0.001) and advanced (IIIb-IV) LUSC. In 43.3% (293/676) patients harboring HLALOH, LOH co-occurred in HLA-A, B, and C. Consistent with previous studies, the occurrence of HLALOH was relevant to an elevated TMB level(median TMB 6.72 vs. 5.76, p 〈 0.0001). In addition, the TMB level of patients with LOH at all three HLA-I loci was higher than those with LOH at only one HLA-I locus (median TMB 7.68 vs. 6.72, p=0.027).However, despite that MSI-H patients presented the highest incidence of TMB-H (TMB≥10.56), the incidence of HLALOH decreased in these patients. Alterations of multiple signaling pathways are enriched in HLALOH patients, including CPF (checkpoint factor) pathway, FA (Fanconi anemia) pathway, p53 pathway, RTK/RAS pathway, Notch pathway, Hippo pathway and Nrf2 pathway(p 〈 0.0001, p=0.023, p 〈 0.0001, p 〈 0.0001, p=0.032, p=0.013, p=0.003, respectively, Table).Several oncogenes, such as TP53 and LRP1B, had higher alteration frequencies in the HLALOH group(p 〈 0.001 for TP53,p 〈 0.05 for LRP1B, Table 1). Conclusions: The 1021-gene panel could be applied for HLALOH analysis, provided that the relevant regions are well captured. The prevalence of HLALOH in Chinese cancer patients presents considerable differences across cancer types. Besides, the occurrence of HLA LOH was accompanied by higher alteration frequencies in several oncogenes and oncogenic signaling pathways. These insights may provide valuable information for clinical practice and follow-up research.[Table: see text]
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2021
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  • 6
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 35, No. 15_suppl ( 2017-05-20), p. 7540-7540
    Abstract: 7540 Background: Currently concomitant or sequential chemotherapy with radiotherapy has been recognized as the standard treatment for extranodal natural killer/T-cell lymphoma, nasal type (ENKTL). However, the optimal schedule has not been fully defined. Methods: We designed a phase II prospective study to investigate the efficacy and toxicity profile of sequential radiation followed by systemic GDP (gemcitabine, dexamethasone and cisplatin) chemotherapy on previously untreated early-staged (stage IE/IIE) ENKTL patients with at least one unfavorable prognostic factor. The primary endpoint was 2-year progression-free survival (PFS). Secondary endpoints were 2-year overall survival (OS), overall response rate (ORR), and toxicity. Results: A total of40 patients were enrolled and completed the entire course of treatment between June 2010 and June 2014. The median age was 38 (range 25-63) years old. All the enrolled patients presented with at least one unfavorable prognostic feature: age 〉 60 years (5.0%), B symptom (40%), elevated serum LDH (40.0%), regional lymph node involvement (32.5%) and primary tumor invasion (87.5%). At the completion of the whole treatment, ORR was 97.5% and the complete remission rate was 95.0%. Median follow-up time was 43.7 months (range 9.4-72.3 months). 2-, 3-, 5-year PFS rates were 84.7%, 82.1%, 77.5%, and OS rates were 89.9%, 87.1%, 79.7%, respectively. Recurrence within the RT field was observed in four patients and systemic failure in three individuals. Grade 1-2 skin reaction and mucositis were the main toxicity related to radiation. Grade 3-4 neutropenia (12/40), thrombocytopenia (7/40) and anemia (2/40) were observed during GDP chemotherapy. No clinically significant late toxicities were observed during follow-up visits. Conclusions: The current results indicates that first-line radiation followed by GDP chemotherapy can be one of the most effective and feasible treatment schedule for early-stage ENKTL patients, especially those with poor prognostic factors. Clinical trial information: NCT02276248.
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2017
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  • 7
    Online Resource
    Online Resource
    American Society of Clinical Oncology (ASCO) ; 2020
    In:  Journal of Clinical Oncology Vol. 38, No. 15_suppl ( 2020-05-20), p. e18528-e18528
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 38, No. 15_suppl ( 2020-05-20), p. e18528-e18528
    Abstract: e18528 Background: The view that neoantigens serve as potential vaccine targets has arisen in the last decade. Clinical and computational efforts have been done to increase the practicality of its application in real world. With these advances, we conducted a retrospective study on a Chinese population to explore the clinical feasibility of neoantigen-based vaccines for head and neck cancer treatment. Methods: Tumor and normal samples were profiled using a 1021-gene panel. Sequencing data were pre-analyzed according to our in-house standard procedures. Class I HLA typing was completed using OptiType v1.0. Curated somatic mutations in coding regions (SNVs and non-frameshift Indels with an allele frequency ≥ 5%) were collected and altered peptides produced by these mutations were analyzed using NetMHCpan v4.0. Peptides with an IC 50 〈 500 nM were considered potential binders, and especially, those with an IC 50 〈 50 nM were considered strong binders. An altered peptide was considered a neoantigen if IC 50 altere d is 〈 IC 50 wildtype . Results: We analyzed a total of 243 patients and detected 114 unique HLA alleles. By carrier percentage, the top three alleles are C*01:02 (44%), B*46:01 (36%), and A*11:01 (33%). In total, 743 mutations were deemed eligible for neoantigen prediction and 223 unique neoantigens were found. Of these neoantigens, 67 (carried by 21% of patients) were strong binders, among which 26 (carried by 9% patients) exhibited a great fold change (≥ 5 folds) of binding affinity. Moreover, the neoantigens in these patients are unique, as only two neoantigens were shared. A search for shared neoantigens revealed a combination of mutation PIK3CA p.E542K and HLA A*11:01, which was detected in 0.54% of all patients. Additionally, 43.6% (106/243) of patients were diagnosed with nasopharyngeal carcinoma, among whom 42% (44/106) possessed predicted neoantigens, including 15 patients with strong-binder neoantigens. Conclusions: (1) Neoantigen-based vaccination is a practical measure to treat patients with head and neck cancer, as indicated by the percentage of patients harboring strong-binder neoantigens. (2) Off-the-shelf neoantigen vaccines may not be practical, given the result that the most common combination of a neoantigen-producing mutation and the corresponding HLA was only found in 0.54% of all patients.
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
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    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2020
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  • 8
    Online Resource
    Online Resource
    American Society of Clinical Oncology (ASCO) ; 2020
    In:  Journal of Clinical Oncology Vol. 38, No. 15_suppl ( 2020-05-20), p. 4028-4028
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 38, No. 15_suppl ( 2020-05-20), p. 4028-4028
    Abstract: 4028 Background: Fruquintinib, a vascular endothelial growth factor receptor (VEGFR) inhibitor, is a new anti-cancer targeting drug independently developed in China for refractory metastatic colorectal cancer (mCRC). Because Regorafenib combined with nivolumab has a promising future in patients with refractory mCRC, we aim to evaluate the efficiency of combination of Fruquintinib with Sintilimab (a highly selective, fully human monoclonal antibody PD-1 mAb) in these patients. Methods: Fifty-two patients with refractory mCRC were given fruquintinib (3mg orally, once daily for 3 weeks, followed by 1 weeks off in 4 weeks cycles) and sintilimab (200mg intravenously, once every 3 weeks). Before treatment, peripheral blood samples were collected and next-generation sequencing was performed to detect the gene profile of patients. Results: The ORR was 15.38% (8/52), DCR was 57.6% (30/52), and mPFS was 108 days. The patients was divided into two groups according to their PFS: PFS ≥ 90 days and PFS 〈 90 days. PFS was significantly worse in patients with the following mutations: AMER1 ( p=0.0073), DNMT3A ( p=0.0075), ETV5 ( p=0.012), EWSR1 ( p=0.016), FANCA ( p=0.019), IKBKE ( p=0.0073), NOTCH1 ( p=0.015), STAG2 ( p=0.012) and TCF7L2 ( p=0.0073). It was also significantly worse in the patients had the abnormalities of complexity and coagulation cascades ( p = 0.026) and pancreatic cancer pathway ( p = 0.0098). Conclusions: Fruquintinib combined with Sintilimab seemed not resulted in a significant increase in ORR, DCR and OS in refractory mCRC. Certain mutational genes and abnormal pathway caused by some frameshift mutations may affect the efficacy. It is suggested that targeting these mutational genes and signaling pathway may be helpful to improve the efficacy of Fruquintinib combination with Sintilimab.
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2020
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  • 9
    Online Resource
    Online Resource
    American Society of Clinical Oncology (ASCO) ; 2019
    In:  Journal of Clinical Oncology Vol. 37, No. 15_suppl ( 2019-05-20), p. 3078-3078
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 37, No. 15_suppl ( 2019-05-20), p. 3078-3078
    Abstract: 3078 Background: MET is a transmembrane receptor tyrosine kinase and deregulated in many kinds of tumors by mutation, rearrangement and amplification. Since the first c onstitutively active MET rearrangement ( TPR-MET) was discovered, many other MET rearrangements have been identified in various tumor types. However, the frequency and characteristic of MET rearrangement in Chinese cancer patients is still unclear. Methods: Targeted sequencing using 1021-gene panel or 59-gene panel was performed on 3952 tissue samples and 5100 blood-based ctDNA samples from 9052 unique patients across 10 cancer types. All MET exons were sequenced, but MET intronic breakpoints were not specifically baited. Results: 24 (0.27%) MET kinase domain rearrangements (KDRE) were identified in 9052 patients. Specifically, 0.25% (16/6284) in non-small cell lung cancer (NSCLC), 0.69% (2/290) in gastric adenocarcinoma, 0.32% (2/897) in colorectal cancer, 0.33% (2/610) in breast cancer, 0.3% (1/330) in hepatocellular carcinoma and 0.69% (1/145) in ovarian cancer, none in 139 pancreatic cancer, 136 thyroid cancer, 111 renal cell carcinoma and 110 esophageal squamous cell carcinoma. Among all of the MET KDRE, 17 were fusions with 5’ identified partner, 3 were kinase domain duplication (KDD) and 4 were probable fusions with unidentified partner. The most common 5 ’partner gene was CAPZA2, followed by CD47 and TES. In the MET KDRE cases in NSCLC, 56.25% (9/16) did not found any clinical actionable variants referring to the NCCN guideline. In addition, MET amplification, EGFR L858R or exon 19 deletion and KRAS mutation co-occurred in 25% (4/16), 18.75% (3/16) and 12.5% (2/16) of NSCLC MET KDRE cases respectively. Conclusions: Our results, for the first time, illustrate the MET KDRE across 10 cancer types among Chinese population and might provide some novel targets to develop new therapies for patients with MET KDRE. MET KDRE across different tumor types. [Table: see text]
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2019
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  • 10
    Online Resource
    Online Resource
    American Society of Clinical Oncology (ASCO) ; 2018
    In:  Journal of Clinical Oncology Vol. 36, No. 15_suppl ( 2018-05-20), p. e19527-e19527
    In: Journal of Clinical Oncology, American Society of Clinical Oncology (ASCO), Vol. 36, No. 15_suppl ( 2018-05-20), p. e19527-e19527
    Type of Medium: Online Resource
    ISSN: 0732-183X , 1527-7755
    RVK:
    RVK:
    Language: English
    Publisher: American Society of Clinical Oncology (ASCO)
    Publication Date: 2018
    detail.hit.zdb_id: 2005181-5
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