Abstract:
BACKGROUND:Two types of epidermal growth factor receptor (EGFR) mutations in exon 19 and exon 21 (ex19del and L858R) are prevalent in lung cancer patients and sensitive to targeted EGFR inhibition. A resistance mutation in exon 20 (T790M) has been found to accompany drug treatment when patients relapse. These three mutations are valuable companion diagnostic biomarkers for guiding personalized treatment. Quantitative polymerase chain reaction (qPCR)-based methods have been widely used in the clinic by physicians to guide treatment decisions. The aim of this study was to evaluate the technical and clinical sensitivity and specificity of the droplet digital polymerase chain reaction (ddPCR) method in detecting the three EGFR mutations in patients with lung cancer. METHODS:Genomic DNA from H1975 and PC-9 cells, as well as 92 normal human blood specimens, was used to determine the technical sensitivity and specificity of the ddPCR assays. Genomic DNA of formalin-fixed, paraffin-embedded specimens from 78 Chinese patients with lung adenocarcinoma were assayed using both qPCR and ddPCR. RESULTS:The three ddPCR assays had a limit of detection of 0.02% and a wide dynamic range from 1 to 20,000 copies measurement. The L858R and ex19del assays had a 0% background level in the technical and clinical settings. The T790M assay appeared to have a 0.03% technical background. The ddPCR assays were robust for correct determination of EGFR mutation status in patients, and the dynamic range appeared to be better than qPCR methods. The ddPCR assay for T790M could detect patient samples that the qPCR method failed to detect. About 49% of this patient cohort had EGFR mutations (L858R, 15.4%; ex19del, 29.5%; T790M, 6.4%). Two patients with the ex19del mutation also had a naïve T790M mutation. CONCLUSION:These data suggest that the ddPCR method could be useful in the personalized treatment of patients with lung cancer.
journal_name
Onco Targets Therjournal_title
OncoTargets and therapyauthors
Xu Q,Zhu Y,Bai Y,Wei X,Zheng X,Mao M,Zheng Gdoi
10.2147/OTT.S84938subject
Has Abstractpub_date
2015-06-22 00:00:00pages
1533-41issn
1178-6930pii
ott-8-1533journal_volume
8pub_type
杂志文章abstract:BACKGROUND:Everolimus, an inhibitor of the mammalian target of rapamycin, shows promising antitumor activity when combined with trastuzumab and chemotherapy for human epidermal growth factor receptor-2 (HER2)-positive breast cancer or when combined with endocrine agents for hormone receptor (HR)-positive tumors. Howeve...
journal_title:OncoTargets and therapy
pub_type:
doi:10.2147/OTT.S104398
更新日期:2016-07-01 00:00:00
abstract:BACKGROUND:Due to the hypervascular nature of glioblastoma (GBM), antiangiogenic treatments, such as vatalanib, have been added as an adjuvant to control angiogenesis and tumor growth. However, evidence of progressive tumor growth and resistance to antiangiogenic treatment has been observed. To counter the unwanted eff...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S93790
更新日期:2016-03-09 00:00:00
abstract:Background:Paclitaxel is widely used in the treatment of cancer and has a good effect in the treatment of non-small cell lung cancer. The combination of TMT proteomics and bioinformatics is used to systematically analyze the molecular mechanism of paclitaxel in the treatment of lung adenocarcinoma A549 cell, which is h...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S259895
更新日期:2020-10-13 00:00:00
abstract:Introduction:Because only a small portion of NSCLC (non-small-cell lung cancer) patients benefit from molecular targeted therapy or immunotherapy and do not develop therapeutic resistance, continued research on new targets is warranted. Serotonin has recently emerged as a growth factor for tumor cells, and its receptor...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S244339
更新日期:2020-03-09 00:00:00
abstract:BACKGROUND:Experimental disruption of the telomere overhang induces a potent DNA damage response and is the target of newly emerging cancer therapeutics. Introduction of T-oligo, an eleven-base oligonucleotide homologous to the 3'-telomeric overhang, mimics telomere disruption and induces DNA damage responses through a...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S54575
更新日期:2013-12-18 00:00:00
abstract::Glioblastoma is the most aggressive type of brain tumor with a very poor prognosis. Therefore, it is always of great importance to explore and develop new potential treatment for glioblastoma. Quercetin, a flavonoid present in a variety of human foods, has been shown to inhibit various tumor cell proliferation. In thi...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S136821
更新日期:2017-08-11 00:00:00
abstract:Introduction:Odd-skipped related transcription factor 1 (OSR1) is a newly identified tumor suppressor in many tumor types. However, the role and mechanism of OSR1 in colon adenocarcinoma (COAD) remain unknown. Methods:OSR1 expression was detected in COAD tissues and cells. COAD cells with OSR1 overexpression or knockd...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S242386
更新日期:2020-04-24 00:00:00
abstract:Background:Erdheim-Chester Disease (ECD) is a clonal non-Langerhans histiocytosis, classified as a macrophage-dendritic cell neoplasm in the 2016 WHO classification. The exact cell of origin of ECD is unknown, although some limited evidence suggests that it arises from myeloid progenitors. Case Presentation:A 43-year-...
journal_title:OncoTargets and therapy
pub_type:
doi:10.2147/OTT.S276497
更新日期:2020-11-16 00:00:00
abstract:Background:To investigate the effect of topical application of CpG oligodeoxynucleotide (CpG-ODN) combined with anti-4-1BB antibodies on mouse HCC multiple tumor-bearing models and the degree of improvement of anti-tumor immune response in mice. Materials and Methods:We inoculated each BALB/c male mouse subcutaneously...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S260353
更新日期:2020-07-20 00:00:00
abstract:AIM:To investigate the clinical significance of cyclic adenosine monophosphate-responsive element-binding (CREB) and phosphorylated CREB (pCREB) expression in human hepatocellular carcinoma (HCC). MATERIALS AND METHODS:Immunohistochemistry and Western blot analyses were performed to detect the expression and subcellul...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S63594
更新日期:2014-05-29 00:00:00
abstract:Purpose:Radioresistance is a vital obstacle for the prognosis of human nasopharyngeal carcinoma (NPC), but the underlying mechanism is still unknown. Here, we explored the role of the NRF2/KEAP1 pathway in radioresistance of NPC cell lines. Materials and Methods:We selected NPC cell lines CNE-1 and CNE-2, treated them...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S260169
更新日期:2020-09-11 00:00:00
abstract::This report describes a patient with intravascular large B-cell lymphoma (IVLBCL) with central nervous system involvement at the time of diagnosis who achieved complete remission for over 5 years in response to therapy. The patient, a 71 year-old woman, was previously healthy with the exception of taking verapamil for...
journal_title:OncoTargets and therapy
pub_type:
doi:10.2147/OTT.S72596
更新日期:2014-11-18 00:00:00
abstract:Purpose:X-Ray Repair Cross Complementing 1 (XRCC1) functioning in the base excision repair pathway plays an important role in the repair of DNA single-strand breaks caused by ionizing radiation. The relationship between XRCC1 polymorphisms and the risk of radiation-induced side effects on normal tissues remains controv...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S156175
更新日期:2018-07-06 00:00:00
abstract::Recently, "ipilimumab," an anti-cytotoxic T-lymphocyte antigen-4 (CTLA-4) monoclonal antibody, has been demonstrated to improve overall survival in metastatic melanoma. "CTLA-4" is an immune-checkpoint molecule that downregulates pathways of T-cell activation. Ipilimumab, by targeting CTLA-4, is able to remove the CTL...
journal_title:OncoTargets and therapy
pub_type: 杂志文章,评审
doi:10.2147/OTT.S57335
更新日期:2014-02-19 00:00:00
abstract::Background/Aims: MiR-145 and Smad2 have been widely reported in the development and progression of human malignancies. In the present study, we investigated the correlation between miR-145 and Smad2 in human glioblastoma multiforme (GBM). Methods: The epithelial-mesenchymal transition (EMT) biomarkers and Smad2 were a...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S202129
更新日期:2019-04-23 00:00:00
abstract:Objective:To explore the regulatory effects of circZNF609 on proliferative and migratory capacities of gastric cancer (GC) and its underlying mechanism. Methods:Expression level of circZNF609, CDK6 and miR-483-3p in GC tissues and cells were detected qRT-PCR verification. CCK-8 and transwell assay were conducted the c...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S193031
更新日期:2019-10-04 00:00:00
abstract::We report the case of a man with an advanced nonkeratinizing squamous cell thymic carcinoma harboring c-KIT exon 13 missense mutation K642E. This aberration is rare and has never been described previously in patients with thymic cancers. It has been found in a small number of cases of gastrointestinal stromal tumor an...
journal_title:OncoTargets and therapy
pub_type:
doi:10.2147/OTT.S58902
更新日期:2014-05-08 00:00:00
abstract::Blastic plasmacytoid dendritic cell neoplasm (BPDCN) is a rare myeloid malignancy, for which conventional chemotherapy has poor outcomes. CD123, the α-subunit of interleukin (IL)-3 receptor, is constantly overexpressed at the surface of tumoral cells. Tagraxofusp (or SL-401) is a recombinant cytotoxin which consists o...
journal_title:OncoTargets and therapy
pub_type: 杂志文章,评审
doi:10.2147/OTT.S228342
更新日期:2020-06-09 00:00:00
abstract::Intrahepatic cholangiocarcinomas (IHCCs) are morphologically and biologically similar to pancreatic ductal adenocarcinomas (PDACs), so newly identified PDAC-associated genes or proteins could provide clues for screening novel biomarkers for IHCC. In this study, the expression of three novel PDAC tumor markers (T-box t...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S39646
更新日期:2013-01-01 00:00:00
abstract::Malignant gliomas are invasive tumors with the potential to progress through current available therapies. These tumors are characterized by a number of abnormalities in molecular signaling that play roles in tumorigenesis, spread, and survival. These pathways are being actively investigated in both the pre-clinical an...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/ott.s3027
更新日期:2009-02-18 00:00:00
abstract:Background:Pancreatic cancer (PC) is one of the fatal cancers globally. CircDEAD-box helicase 42 (circDDX42) has been reported to play an oncogenic role in many cancers. The purpose of our study was to explore the relationship between circDDX42 and PC development and the potential mechanism by which circDDX42 modulatin...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S233000
更新日期:2020-10-28 00:00:00
abstract:Background:Naloxone is viewed as a specific competitive opioid antagonist acting at the level of opioid receptors (μ, δ, and κ) with blended agonist-adversary or agonist action. The role of naloxone in tumor cell growth has been poorly studied in human cancer cell lines. Materials and methods:In the present study, we ...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S145780
更新日期:2018-01-03 00:00:00
abstract:Background:Since colorectal cancer (CRC) is one of the most common malignant tumors worldwide, we aimed to identify the role of sex determining region Y (SRY)-box 18 (SOX18) in CRC. Methods:RT-PCR and immunohistochemistry were employed to detect the expression of SOX18 in CRC samples. We then identified the effect of ...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S178916
更新日期:2018-11-29 00:00:00
abstract:OBJECTIVE:Despite advances in the early diagnosis of gastrointestinal (GI) cancers, these cancers are often being detected rather late in their course. Emerging published data on the accuracy of dickkopf-1 (DKK1) for diagnosing GI cancers are inconsistent. The purpose of this systematic review and meta-analysis was to ...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S93152
更新日期:2015-10-22 00:00:00
abstract:Purpose:This study is aimed to investigate the combined treating efficacy of sodium butyrate and docetaxel on proliferation and apoptosis of the lung adenocarcinoma A549 cell line based on Gli1 regulation in vitro and in vivo. Materials and Methods:RNA interference method was used to overexpress Gli1 in A549 cells. Ce...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S252323
更新日期:2020-09-04 00:00:00
abstract:Introduction:Melanoma is a common skin cancer that is usually associated with poor clinical outcomes. Recently, the immune checkpoint GITR has been identified as a promising target for immunotherapy of melanoma. In this study, we aimed to investigate the post-translational regulation mechanism of GITR in melanoma. Met...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S212317
更新日期:2019-12-04 00:00:00
abstract:Aim:To explore the expression and clinical significance of long noncoding RNA (lncRNA) gastric cancer-associated transcript 3 (GACAT3) in human colorectal cancer (CRC). Methods:Expression of GACAT3 in CRC tissues and cell lines was measured using quantitative real-time PCR. CCK-8 and colony formation assays were used ...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S144103
更新日期:2018-03-19 00:00:00
abstract:Purpose:To evaluate the capability of 18F-fluorodeoxyglucose positron emission tomography/ computed tomography (18F-FDG-PET/CT) to predict the clinical response of metastatic lymph node (mLN) to definitive chemoradiotherapy (dCRT) and guide personalized radiation dose in esophageal squamous cell carcinoma (ESCC) patien...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S160456
更新日期:2018-07-25 00:00:00
abstract:Purpose:This study aimed to explore significant genes and pathways involved in the pathogenesis of supratentorial primitive neuroectodermal tumor (sPNET). Materials and methods:Gene expression profile of GSE14295 was downloaded from publicly available Gene Expression Omnibus (GEO) database. Differentially expressed ge...
journal_title:OncoTargets and therapy
pub_type: 杂志文章
doi:10.2147/OTT.S148776
更新日期:2018-04-04 00:00:00
abstract::Preclinical studies have demonstrated that Apatinib, major targeting vascular endothelial growth factor receptor-2 (VEGFR-2), could inhibit the proliferation of anaplastic thyroid carcinoma (ATC) cells in vitro and in vivo. The efficacy and safety in ATC patients, however, remains unknown. Here, we report the case of ...
journal_title:OncoTargets and therapy
pub_type:
doi:10.2147/OTT.S223727
更新日期:2019-12-02 00:00:00