SANDRA STICKLER¹, BARBARA RATH¹, MAXIMILIAN HOCHMAIR², CLEMENS LANG³, LUKAS WEIGL⁴, GERHARD HAMILTON^1,*

Oncology Research, Vol.31, No.1, pp. 13-22, 2023, DOI:10.32604/or.2022.027281

Abstract Small cell lung cancer (SCLC) is frequently disseminated and has a dismal prognosis with survival times of approximately two years. This cancer responds well to initial chemotherapy but recurs within a short time as a globally chemoresistant tumor. Circulating tumor cells (CTCs) are held responsible for metastasis, the extremely high numbers of these cells in advanced SCLC allowed us to establish several permanent CTC cell lines. These CTCs are distinguished by the spontaneous formation of large spheroids, termed tumorospheres, in regular tissue culture. These contain quiescent and hypoxic cells in their interior and are associated with high chemoresistance compared to… More >

ZAHRA NASRPOUR NAVAEI¹, GHAZALEH KHALILI-TANHA¹, AMIR SADRA ZANGOUEI², MOHAMMAD REZA ABBASZADEGAN³, MEYSAM MOGHBELI^1,3,*

Oncology Research, Vol.29, No.4, pp. 235-250, 2021, DOI:10.32604/or.2022.025323

Abstract Chemotherapy is one of the main therapeutic modalities for cancer patients. Cisplatin (CDDP), as one of the first-line drugs, is of great importance in the chemotherapy of various tumors. However, a significant percentage of cancer patients are resistant to CDDP treatment. Due to the CDDP side effects on normal tissues, the diagnosis of CDDP resistance is required to suggest the most efficient therapeutic strategies for cancer patients. Several molecular mechanisms and signaling pathways are associated with CDDP response. The PI3K/AKT signaling pathway has a pivotal role in the transmission of extracellular signals into the cells to regulate various pathophysiological processes… More >

Xiaohui Shen, Xia Gao, Hui Li, Yajun Gu, Junguo Wang

Oncology Research, Vol.27, No.1, pp. 73-80, 2019, DOI:10.3727/096504018X15201099883047

Abstract Laryngeal carcinoma is a type of head and neck carcinoma with a high incidence and mortality. Chemotherapy treatments of human laryngeal carcinoma may fail due to the development of chemoresistance. Tissue inhibitor of metalloproteinase 3 (TIMP-3) has been shown to be implicated in a number of pathological processes typical for cancer. The present study aims to investigate the involvement of TIMP-3 in the chemoresistance of laryngeal carcinoma. We showed that TIMP-3 expression was significantly decreased in chemoresistant laryngeal carcinoma tissues compared with chemosensitivity tissues. Patients with low TIMP-3 expression exhibited poorer overall survival than those with high TIMP-3 expression. Moreover,… More >

Hongbo Sun^*1, Zhifu Zhang^*1, Wei Luo^*, Junmin Liu^*, Ye Lou^†, Shengmei Xia^‡

Oncology Research, Vol.27, No.8, pp. 935-944, 2019, DOI:10.3727/096504019X15555388198071

Abstract Acute lymphoblastic leukemia (ALL) is the most prevalent of pediatric cancers. Neuroepithelial cell-transforming 1 (NET1) has been associated with malignancy in a number of cancers, but the role of NET1 in ALL development is unclear. In the present study, we investigated the effect of NET1 gene in ALL cell proliferation and chemoresistance. We analyzed GEO microarray data comparing bone marrow expression profiles of pediatric B-cell ALL samples and those of age-matched controls. MTT and colony formation assays were performed to analyze cell proliferation. ELISA assays, Western blot analyses, and TUNEL staining were used to detect chemoresistance. We confirmed that NET1… More >

Wanjun Yu^*, Weidong Peng^*, Hanyun Sha^†, Jipeng Li^‡

Oncology Research, Vol.27, No.5, pp. 623-628, 2019, DOI:10.3727/096504018X15420734828058

Abstract Circular RNAs (circRNAs) represent a new class of noncoding RNAs that is involved in the development of cancer. However, little is known about their role in chemoresistance. In the present study, we found that hsa_circ_0003998 expression levels in lung adenocarcinoma (LAD) tissues and docetaxel-resistant cell lines (A549/DTX and H1299/DTX) were upregulated. Knockdown of hsa_circ_0003998 decreased chemoresistance, inhibited proliferation, and enhanced apoptosis in docetaxel-resistant LAD cells. Moreover, by using bioinformatics and luciferase reporter assays, we found that miR-326 was a direct target of hsa_circ_0003998. Functional analysis revealed that miR-326 mediated the effect of hsa_circ_0003998 on chemosensitivity. Our findings provide a molecular… More >

Jianing Yi^*, Shuai Chen^*, Pingyong Yi^†, Jinlin Luo^*, Meng Fang^*, Yang Du^*, Lianhong Zou^*, Peizhi Fan^*

Oncology Research, Vol.28, No.5, pp. 519-831, 2020, DOI:10.3727/096504020X15960154585410

Abstract 5-Fluorouracil (5-FU) is a widely used chemotherapeutic agent for breast cancer. However, acquired chemoresistance leads to a loss of its efficacy; methods to reverse are urgently needed. Some studies have shown that pyrotinib, an ErbB receptor tyrosine kinase inhibitor, is effective against HER2+ breast cancer. However, whether pyrotinib sensitizes 5-FU-resistant breast cancer cells to 5-FU is unknown. We hypothesized that the combination of pyrotinib and 5-FU would show synergistic antitumor activity, and pyrotinib could reverse 5-FU resistance in HER2+ breast cancer cells in vitro and in vivo. Our data showed that pyrotinib inhibited the growth of 5-FU-resistant SKBR-3/FU and MDA-MB-453/FU… More >

Weili Min^*1, Liangzhang Sun^†1, Burong Li^‡, Xiao Gao^*, Shuqun Zhang^*, Yang Zhao^*

Oncology Research, Vol.28, No.9, pp. 857-872, 2020, DOI:10.3727/096504021X16203818567367

Abstract EMT confers increased metastatic potential and the resistance to chemotherapies to cancer cells. However, the precise mechanisms of EMT-related chemotherapy resistance remain unclear. c-Src-mediated caspase 8 phosphorylation essential for EMT in lung adenocarcinoma cell lines preferentially occurs in cells with the mesenchymal phenotype, resulting in chemoresistance to cisplatin plus paclitaxel in patients with resectable lung adenocarcinoma and a significantly worse 5-year PFS. Cisplatin killed lung adenocarcinoma cells regardless of caspase 8. Paclitaxel-triggered necroptosis in lung adenocarcinoma cells was dependent on the phosphorylation or deficiency of caspase 8, during which FADD interacted with RIPK1 to activate the RIPK1/RIPK3/MLKL signaling axis. Accompanied… More >

Xiangbin Tan^*1, Zefei Liao^†1, Shuangyou Zou^*, Liangyun Ma^†, Aimin Wang^*

Oncology Research, Vol.28, No.1, pp. 3-11, 2020, DOI:10.3727/096504019X15509383469698

Abstract Vasohibin2 (VASH2), a proangiogenic factor, has been demonstrated to play an oncogenic role in some common human cancers. However, the detailed function of VASH2 in non-small cell lung cancer (NSCLC) has not previously been studied. In this study, we found that VASH2 was significantly upregulated in NSCLC tissues and cell lines, and its increased expression was associated with NSCLC progression and poor prognosis of patients. Knockdown of VASH2 markedly inhibited cell proliferation and P-glycoprotein expression in NSCLC cells. Overexpression of VASH2 enhanced cell proliferation, P-glycoprotein expression, as well as doxorubicin resistance in NSCLC cells. Moreover, the expression levels of VASH2… More >

AJIT C. DHADVE^1,2, PRITHA RAY^1,2

BIOCELL, Vol.46, No.1, pp. 75-86, 2022, DOI:10.32604/biocell.2022.016346

Abstract Progression, relapse, and therapy resistance are the most challenging features of cancer therapy that have been postulated to be driven by Cancer Stem Cell (CSC) population. This enigmatic subpopulation of cancer cells has therefore emerged as promising therapeutic candidate. We earlier reported enrichment of CSC-like side population (SP) with increasing resistance towards Cisplatin and Paclitaxel either alone or in combination in epithelial ovarian cancer (EOC) cells. This SP population is a small proportion of the total population of cancer cells characterised with high expression of drug transporters, a unique feature of stem cells and thereby can be isolated through their… More >

Elda A. Flores-Contreras¹, Everardo González-González^2,3, Ana I. Zarazúa-Niño¹, Elsa N. Garza-Treviño¹, Natalia Martínez-Acuña¹, Viviana C. Zomosa-Signoret⁴, Román Vidaltamayo⁴, Gerardo E. Muñoz-Maldonado⁵, Raquel Garza-Guajardo⁶, Manuel de J. García-Solís⁷, Alejandro Abarca-Blanco³, Ana M. G. Rivas-Estilla¹, Carlos Córdova-Fletes^1,*

Oncologie, Vol.23, No.3, pp. 373-392, 2021, DOI:10.32604/oncologie.2021.017786

Abstract Breast cancer (BC) is one of the leading causes of death in women worldwide. A major challenge in BC is chemoresistance, which is often modulated by epigenetic regulators such as long non-coding RNAs (lncRNAs). Because these regulator lncRNAs may play diverse roles, determining their specific pathways and/or functions is crucial to identify possible biomarkers and/or therapeutic targets for BC. In this study, we used gene expression microarrays in order to identify lncRNAs related to the BC biology. We found, among six differentially expressed (DE) lncRNAs, that the expression of lnc-ERP44-3:6 was consistently down-regulated in all breast tumor tissues compared to… More >