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Baldasso-Zanon A, Silva AO, Franco N, Picon RV, Lenz G, Lopez PLDC, Filippi-Chiela EC. The rational modulation of autophagy sensitizes colorectal cancer cells to 5-fluouracil and oxaliplatin. J Cell Biochem 2024; 125:e30517. [PMID: 38224178 DOI: 10.1002/jcb.30517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/25/2023] [Accepted: 12/18/2023] [Indexed: 01/16/2024]
Abstract
Colorectal cancer (CRC) is the third most common and deadliest cancer globally. Regimens using 5-fluorouracil (5FU) and Oxaliplatin (OXA) are the first-line treatment for CRC, but tumor recurrence is frequent. It is plausible to hypothesize that differential cellular responses are triggered after treatments depending on the genetic background of CRC cells and that the rational modulation of cell tolerance mechanisms like autophagy may reduce the regrowth of CRC cells. This study proposes investigating the cellular mechanisms triggered by CRC cells exposed to 5FU and OXA using a preclinical experimental design mimicking one cycle of the clinical regimen (i.e., 48 h of treatment repeated every 2 weeks). To test this, we treated CRC human cell lines HCT116 and HT29 with the 5FU and OXA, combined or not, for 48 h, followed by analysis for two additional weeks. Compared to single-drug treatments, the co-treatment reduced tumor cell regrowth, clonogenicity and stemness, phenotypes associated with tumor aggressiveness and poor prognosis in clinics. This effect was exerted by the induction of apoptosis and senescence only in the co-treatment. However, a week after treatment, cells that tolerated the treatment had high levels of autophagy features and restored the proliferative phenotype, resembling tumor recurrence. The pharmacologic suppression of early autophagy during its peak of occurrence, but not concomitant with chemotherapeutics, strongly reduced cell regrowth. Overall, our experimental model provides new insights into the cellular mechanisms that underlie the response and tolerance of CRC cells to 5FU and OXA, suggesting optimized, time-specific autophagy inhibition as a new avenue for improving the efficacy of current treatments.
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Affiliation(s)
- Andréa Baldasso-Zanon
- Programa de Pós-Graduação Ciências em Gastroenterologia e Hepatologia, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
- Centro de Pesquisas Experimental, Laboratório de Biologia Celular e Molecular, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Andrew Oliveira Silva
- Centro de Pesquisas Experimental, Laboratório de Biologia Celular e Molecular, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
- Unidade Centro RS, Faculdade Estácio do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Nayara Franco
- Programa de Pós-Graduação Ciências em Gastroenterologia e Hepatologia, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
- Centro de Pesquisas Experimental, Laboratório de Biologia Celular e Molecular, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Rafael V Picon
- Programa de Pós-Graduação Ciências em Gastroenterologia e Hepatologia, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
- Departamento de Medicina Interna, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
| | - Guido Lenz
- Departamento de Biofísica, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Patrícia Luciana da Costa Lopez
- Programa de Pós-Graduação Ciências em Gastroenterologia e Hepatologia, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
- Centro de Pesquisas Experimental, Laboratório de Biologia Celular e Molecular, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
| | - Eduardo C Filippi-Chiela
- Programa de Pós-Graduação Ciências em Gastroenterologia e Hepatologia, Faculdade de Medicina, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul, Brazil
- Centro de Pesquisas Experimental, Laboratório de Biologia Celular e Molecular, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
- Departamento de Ciências Morfológicas, UFRGS, Porto Alegre, Rio Grande do Sul, Brazil
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Filippi-Chiela EC, Vargas JE, Bueno E Silva MM, Thomé MP, Lenz G. Vincristine promotes differential levels of apoptosis, mitotic catastrophe, and senescence depending on the genetic background of glioblastoma cells. Toxicol In Vitro 2022; 85:105472. [PMID: 36116745 DOI: 10.1016/j.tiv.2022.105472] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 09/02/2022] [Accepted: 09/08/2022] [Indexed: 10/14/2022]
Abstract
Vincristine (VCR) is a classical chemotherapeutic that has been revisited to treat refractory solid tumors producing encouraging results. VCR binds to tubulin and decreases the rate of microtubule dynamics, thus triggering many cellular responses and behaviors. However, the dynamics of these responses and fates are uncharacterized. This study combined systems biology approaches with acute and long-term in vitro experiments to predict key pathways and mechanisms associated with cell fates during and after VCR treatment. Glioblastoma (GBM) cells were treated with clinically relevant doses of VCR, and interconnected cell fates were explored. A correlation matrix based on experimental cell analysis reported strong negative correlations between cell number, nuclear irregularities, senescence, or apoptosis, depending on the cells' genetic makeup and treatment regimen. P53 would be essential in all analyzed processes according to topological network analysis. Furthermore, despite the high acute sensitivity, both cell lines re-growth in the long term after a single VCR treatment, especially in those populations with high levels of autophagy. These multiple responses may also be triggered in patients' exposed tumors, which should be considered to allow the rational design of VCR protocols, including modulators of the cell fates and pathways mentioned above.
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Affiliation(s)
- Eduardo Cremonese Filippi-Chiela
- Departamento de Ciências Morfológicas, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil; Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil.
| | - Jose Eduardo Vargas
- Departamento de Biologia Celular, Universidade Federal do Paraná, Curitiba, Brazil
| | | | - Marcos Paulo Thomé
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Guido Lenz
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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Wu J, Wang X, Yuan X, Shan Q, Wang Z, Wu Y, Xie J. Kinesin Family Member C1 Increases Temozolomide Resistance of Glioblastoma Through Promoting DNA Damage Repair. Cell Transplant 2021; 30:963689721991466. [PMID: 33588605 PMCID: PMC7894588 DOI: 10.1177/0963689721991466] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Glioblastoma (GBM) is one of the most frequent primary malignant brain tumors with a poor prognosis. Unfortunately, due to the intrinsic or acquired chemoresistance of GBM cells, it easily becomes refractory disease and tumors are easy to recur. Therefore, it is critical to elucidate the molecular mechanisms underlying the chemoresistance of GBM cells to discover more efficient therapeutic treatments. Kinesin family member C1 (KIFC1) is a normal nonessential kinesin motor that affects the progression of multiple types of cancers. However, whether KIFC1 have a function in GBM is still unexplored. Here we found that KIFC1 was upregulated in human temozolomide (TMZ)-resistant GBM tissues. KIFC1 silencing is sufficient to inhibit GBM cell proliferation and amplify TMZ-induced repression of cell proliferation. Mechanistically, KIFC1 silencing contributed to DNA damage, cell cycle arrest, and apoptosis through regulating Rad51, Akt, and DNA-PKcs phosphorylation. We also noticed that KIFC1 silencing also inhibited tumor formation and increased TMZ sensitivity through regulating Ki67, Rad51, γ-H2AX, and phosphorylation of AKT in vivo. Our findings therefore confirm the involvement of KIFC1 in GBM progression and provide a novel understanding of KIFC1-Akt axis in the sensitivity of GBM to chemotherapy.
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Affiliation(s)
- Jianheng Wu
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan Province, China
| | - Xinjun Wang
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan Province, China
| | - Xiaowei Yuan
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan Province, China
| | - Qiao Shan
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan Province, China
| | - Zhen Wang
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan Province, China
| | - Yuehui Wu
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan Province, China
| | - Jingwei Xie
- Department of Neurosurgery, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan Province, China
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Abbaszade Z, Bagca BG, Avci CB. Molecular biological investigation of temozolomide and KC7F2 combination in U87MG glioma cell line. Gene 2021; 776:145445. [PMID: 33484758 DOI: 10.1016/j.gene.2021.145445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 12/25/2020] [Accepted: 01/13/2021] [Indexed: 11/25/2022]
Abstract
Glioblastom Multiforme (GBM) is the most invasive and malignant member of the IV grade of the subclass Astrocytoma according to the last assessment of the 2016 WHO report. Due to the resistance to treatment and weak response, as well as the topographical structure of the blood brain barrier, the treatment is also difficult due to the severe clinical manifestation, and new treatment methods and new therapeutic agents are needed. Temozolomide (TMZ) is widely used in the treatment of glioblastoma and is considered as the primary treatment modality. TMZ, a member of the class of cognitive agents, is currently considered the most effective drug because it can easily pass through the blood brain barrier. Glucose metabolism is a complex energy producing machine that, a glucose molecule produces 38 molecules of ATP after full glycolytic catabolism. According to Otto Warburg's numerous studies cancer cells perform the first glycolytic step without entering the mitochondrial step. These cells produce lactic acid and make the micro-media more acidic even in aerobic conditions. This phenomenon is attributed to the Warburg hypothesis and either as aerobic glycolysis. Although glycolysis enzymes are the primary actors of this phenotypic expression, some genetic and epigenetic factors are no exception. We experimentally used KC7F2 active ingredient to target cancer metabolism. In our study, we evaluated cancer metabolism in combination with the effect of TMZ chemotherapeutic agent, examining the effect of two different agents separately and in combination to observe the effects of cancer cell proliferation, survival, apoptosis and expression of metabolism genes on expression. We observed that the combined effect of reduced the effective dose of the TMZ alkylating agent and that the effect was increased and the effect of the combined teraphy is assessed from a metabolic point of view and that it suppresses aerobic glycolysis.
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Affiliation(s)
- Zaka Abbaszade
- Kazımdirik, Ege Ünv. Hst. No:9, 35100 Bornova/Izmir, Turkey.
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5
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Jin KT, Lu ZB, Lv JQ, Zhang JG. The role of long non-coding RNAs in mediating chemoresistance by modulating autophagy in cancer. RNA Biol 2020; 17:1727-1740. [PMID: 32129701 PMCID: PMC7714480 DOI: 10.1080/15476286.2020.1737787] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 02/19/2020] [Accepted: 02/21/2020] [Indexed: 12/13/2022] Open
Abstract
Cancer is a complex process in which protein-coding and non-coding genes play essential roles. Long noncoding RNAs (lncRNAs), as a subclass of noncoding genes, are implicated in various cancer processes including growth, proliferation, metastasis, and angiogenesis. Due to presence in body fluids such as blood and urine, lncRNAs have become novel biomarkers in cancer detection, diagnosis, progression, and therapy response. Remarkably, increasing evidence has verified that lncRNAs play essential roles in chemoresistance by targeting different signalling pathways. Autophagy, a highly conserved process in response to environmental stresses such as starvation and hypoxia, plays a paradoxical role in inducing resistance or sensitivity to chemotherapy agents. In this regard, we reviewed chemoresistance, the role of lncRNAs in cancer, and the role of lncRNAs in chemoresistance by modulating autophagy.
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Affiliation(s)
- Ke-Tao Jin
- Department of Colorectal Surgery, Shaoxing People’s Hospital (Shaoxing Hospital, Zhejiang University School of Medicine), Shaoxing, Zhejiang Province, P.R. China
| | - Ze-Bei Lu
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Zhejiang Provincial People’s Hospital (People’s Hospital of Hangzhou Medical College), Hangzhou, Zhejiang Province, P.R. China
| | - Jie-Qing Lv
- Department of Colorectal Surgery, Shaoxing People’s Hospital (Shaoxing Hospital, Zhejiang University School of Medicine), Shaoxing, Zhejiang Province, P.R. China
| | - Jun-Gang Zhang
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Zhejiang Provincial People’s Hospital (People’s Hospital of Hangzhou Medical College), Hangzhou, Zhejiang Province, P.R. China
- Hepatobiliary and Pancreatic Surgery, Zhejiang Provincial People’s Hospital (People’s Hospital of Hangzhou Medical College), Hangzhou, Zhejiang Province, P.R. China
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6
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Zhai Z, Samson JM, Yamauchi T, Vaddi PK, Matsumoto Y, Dinarello CA, Ravindran Menon D, Fujita M. Inflammasome Sensor NLRP1 Confers Acquired Drug Resistance to Temozolomide in Human Melanoma. Cancers (Basel) 2020; 12:E2518. [PMID: 32899791 PMCID: PMC7563249 DOI: 10.3390/cancers12092518] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/01/2020] [Accepted: 09/01/2020] [Indexed: 01/13/2023] Open
Abstract
Cancer cells gain drug resistance through a complex mechanism, in which nuclear factor-κB (NF-κB) and interleukin-1β (IL-1β) are critical contributors. Because NACHT, LRR and PYD domains-containing protein (NLRP) inflammasomes mediate IL-1β maturation and NF-κB activation, we investigated the role of inflammasome sensor NLRP1 in acquired drug resistance to temozolomide (TMZ) in melanoma. The sensitivity of melanoma cells to TMZ was negatively correlated with the expression levels of O6-methylguanine-DNA methyltransferase (MGMT), the enzyme to repair TMZ-induced DNA lesions. When MGMT-low human melanoma cells (1205Lu and HS294T) were treated with TMZ for over two months, MGMT was upregulated, and cells became resistant. However, the resistance mechanism was independent of MGMT, and the cells that acquired TMZ resistance showed increased NLRP1 expression, NLRP inflammasome activation, IL-1β secretion, and NF-κB activity, which contributed to the acquired resistance to TMZ. Finally, blocking IL-1 receptor (IL-1R) signaling with IL-1R antagonist decreased TMZ-resistant 1205Lu tumor growth in vivo. Although inflammation has been associated with drug resistance in various cancers, our paper is the first to demonstrate the involvement of NLRP in the development of acquired drug resistance. Because drug-tolerant cancer cells become cross-tolerant to other classes of cancer drugs, NLRP1 might be a suitable therapeutic target in drug-resistant melanoma, as well as in other cancers.
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Affiliation(s)
- Zili Zhai
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Jenny Mae Samson
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Takeshi Yamauchi
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Prasanna K. Vaddi
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Yuko Matsumoto
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Charles A. Dinarello
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA;
| | - Dinoop Ravindran Menon
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Mayumi Fujita
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
- Department of Veterans Affairs Medical Center, VA Eastern Colorado Health Care System, Aurora, CO 80045, USA
- Department of Immunology & Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
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Krause GC, Lima KG, Levorse V, Haute GV, Gassen RB, Garcia MC, Pedrazza L, Donadio MVF, Luft C, de Oliveira JR. Exenatide induces autophagy and prevents the cell regrowth in HepG2 cells. EXCLI JOURNAL 2019; 18:540-548. [PMID: 31611738 PMCID: PMC6785771 DOI: 10.17179/excli2019-1415] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Accepted: 07/18/2019] [Indexed: 12/20/2022]
Abstract
The incidence of hepatocellular carcinoma (HCC) keeps rising year by year, and became the second leading cause of cancer-related death. Some studies have found that liraglutide, a GLP-1 analog, may decrease the tumor cells proliferation. Due to this, the aim of this work is to investigate the antiproliferative potential of exenatide, another GLP-1 analog. Cell proliferation was assessed by direct count with Trypan blue dye exclusion. Flow cytometry was used to determinate autophagy and nuclear staining. Morphometric analysis was used to verify senescence and apoptosis. The mechanism that induced cell growth inhibition was analyzed by Western Blot. Treatment with exenatide significantly decreases cell proliferation and increases autophagy, both in relation to control and liraglutide. In addition, mTOR inhibition was greater in cells treated with exenatide. In relation to chronic treatment, exenatide does not allow cellular regrowth by preventing some resistance mechanism that the cells can acquire. These results suggest that exenatide has a potent anti-proliferative activity via mTOR modulation and, among the GLP-1 analogs tested, could be in the future an alternative for HCC treatment.
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Affiliation(s)
- Gabriele Catyana Krause
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Kelly Goulart Lima
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Vitor Levorse
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Gabriela Viegas Haute
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Rodrigo Benedetti Gassen
- Laboratório de Imunologia Celular e Molecular, Hospital São Lucas, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Maria Cláudia Garcia
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Leonardo Pedrazza
- Ubiquitylation and Cell Signaling Lab. IDIBELL, Department de Ciències Fisiològiques, Universitat de Barcelona, L'Hospitalet de Llobregat - Barcelona, Spain
| | - Márcio Vinícius Fagundes Donadio
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
- Laboratório de Atividade Física em Pediatria, Centro Infant, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Carolina Luft
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
- Laboratório de Atividade Física em Pediatria, Centro Infant, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
| | - Jarbas Rodrigues de Oliveira
- Laboratório de Pesquisa em Biofísica Celular e Inflamação, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Rio Grande do Sul, Brazil
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Padayachee ER, Adeola HA, Van Wyk JC, Nsole Biteghe FA, Chetty S, Khumalo NP, Barth S. Applications of SNAP-tag technology in skin cancer therapy. Health Sci Rep 2019; 2:e103. [PMID: 30809593 PMCID: PMC6375544 DOI: 10.1002/hsr2.103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 10/11/2018] [Accepted: 10/25/2018] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Cancer treatment in the 21st century has seen immense advances in optical imaging and immunotherapy. Significant progress has been made in the bioengineering and production of immunoconjugates to achieve the goal of specifically targeting tumors. DISCUSSION In the 21st century, antibody drug conjugates (ADCs) have been the focus of immunotherapeutic strategies in cancer. ADCs combine the unique targeting of monoclonal antibodies (mAbs) with the cancer killing ability of cytotoxic drugs. However, due to random conjugation methods of drug to antibody, ADCs are associated with poor antigen specificity and low cytotoxicity, resulting in a drug to antibody ratio (DAR) >1. This means that the cytotoxic drugs in ADCs are conjugated randomly to antibodies, by cysteine or lysine residues. This generates heterogeneous ADC populations with 0 to 8 drugs per an antibody, each with distinct pharmacokinetic, efficacy, and toxicity properties. Additionally, heterogeneity is created not only by different antibody to ligand ratios but also by different sites of conjugation. Hence, much effort has been made to find and establish antibody conjugation strategies that enable us to better control stoichiometry and site-specificity. This includes utilizing protein self-labeling tags as fusion partners to the original protein. Site-specific conjugation is a significant characteristic of these engineered proteins. SNAP-tag is one such engineered self-labeling protein tag shown to have promising potential in cancer treatment. The SNAP-tag is fused to an antibody of choice and covalently reacts specifically in a 1:1 ratio with benzylguanine (BG) substrates, eg, fluorophores or photosensitizers, to target skin cancer. This makes SNAP-tag a versatile technique in optical imaging and photoimmunotherapy of skin cancer. CONCLUSION SNAP-tag technology has the potential to contribute greatly to a broad range of molecular oncological applications because it combines efficacious tumor targeting, minimized local and systemic toxicity, and noninvasive assessment of diagnostic/prognostic molecular biomarkers of cancer.
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Affiliation(s)
- Eden Rebecca Padayachee
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, Faculty of Health SciencesUniversity of Cape TownCape TownSouth Africa
| | - Henry Ademola Adeola
- The Hair and Skin Research Lab, Division of Dermatology, Department of Medicine, Faculty of Health SciencesUniversity of Cape Town and Groote Schuur HospitalCape TownSouth Africa
| | - Jennifer Catherine Van Wyk
- The Hair and Skin Research Lab, Division of Dermatology, Department of Medicine, Faculty of Health SciencesUniversity of Cape Town and Groote Schuur HospitalCape TownSouth Africa
| | - Fleury Augustine Nsole Biteghe
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, Faculty of Health SciencesUniversity of Cape TownCape TownSouth Africa
| | - Shivan Chetty
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, Faculty of Health SciencesUniversity of Cape TownCape TownSouth Africa
| | - Nonhlanhla Patience Khumalo
- The Hair and Skin Research Lab, Division of Dermatology, Department of Medicine, Faculty of Health SciencesUniversity of Cape Town and Groote Schuur HospitalCape TownSouth Africa
| | - Stefan Barth
- Department of Integrative Biomedical Sciences, Institute of Infectious Disease and Molecular Medicine, Faculty of Health SciencesUniversity of Cape TownCape TownSouth Africa
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Rare Stochastic Expression of O6-Methylguanine- DNA Methyltransferase (MGMT) in MGMT-Negative Melanoma Cells Determines Immediate Emergence of Drug-Resistant Populations upon Treatment with Temozolomide In Vitro and In Vivo. Cancers (Basel) 2018; 10:cancers10100362. [PMID: 30274152 PMCID: PMC6209933 DOI: 10.3390/cancers10100362] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 09/01/2018] [Accepted: 09/26/2018] [Indexed: 12/21/2022] Open
Abstract
The chemotherapeutic agent temozolomide (TMZ) kills tumor cells preferentially via alkylation of the O6-position of guanine. However, cells that express the DNA repair enzyme O6-methylguanine-DNA methyltransferase (MGMT), or harbor deficient DNA mismatch repair (MMR) function, are profoundly resistant to this drug. TMZ is in clinical use for melanoma, but objective response rates are low, even when TMZ is combined with O6-benzylguanine (O6BG), a potent MGMT inhibitor. We used in vitro and in vivo models of melanoma to characterize the early events leading to cellular TMZ resistance. Melanoma cell lines were exposed to a single treatment with TMZ, at physiologically relevant concentrations, in the absence or presence of O6BG. Surviving clones and mass cultures were analyzed by Western blot, colony formation assays, and DNA methylation studies. Mice with melanoma xenografts received TMZ treatment, and tumor tissue was analyzed by immunohistochemistry. We found that MGMT-negative melanoma cell cultures, before any drug treatment, already harbored a small fraction of MGMT-positive cells, which survived TMZ treatment and promptly became the dominant cell type within the surviving population. The MGMT-negative status in individual cells was not stable, as clonal selection of MGMT-negative cells again resulted in a mixed population harboring MGMT-positive, TMZ-resistant cells. Blocking the survival advantage of MGMT via the addition of O6BG still resulted in surviving clones, although at much lower frequency and independent of MGMT, and the resistance mechanism of these clones was based on a common lack of expression of MSH6, a key MMR enzyme. TMZ treatment of mice implanted with MGMT-negative melanoma cells resulted in effective tumor growth delay, but eventually tumor growth resumed, with tumor tissue having become MGMT positive. Altogether, these data reveal stochastic expression of MGMT as a pre-existing, key determinant of TMZ resistance in melanoma cell lines. Although MGMT activity can effectively be eliminated by pharmacologic intervention with O6BG, additional layers of TMZ resistance, although considerably rarer, are present as well and minimize the cytotoxic impact of TMZ/O6BG combination treatment. Our results provide rational explanations regarding clinical observations, where the TMZ/O6BG regimen has yielded mostly disappointing outcomes in melanoma patients.
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10
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Noh H, Zhao Q, Yan J, Kong LY, Gabrusiewicz K, Hong S, Xia X, Heimberger AB, Li S. Cell surface vimentin-targeted monoclonal antibody 86C increases sensitivity to temozolomide in glioma stem cells. Cancer Lett 2018; 433:176-185. [PMID: 29991446 DOI: 10.1016/j.canlet.2018.07.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Revised: 06/01/2018] [Accepted: 07/03/2018] [Indexed: 11/18/2022]
Abstract
Glioblastoma multiforme (GBM) is the most prevalent and aggressive brain tumor. The current standard therapy, which includes radiation and chemotherapy, is frequently ineffective partially because of drug resistance and poor penetration of the blood-brain barrier. Reducing resistance and increasing sensitivity to chemotherapy may improve outcomes. Glioma stem cells (GSCs) are a source of relapse and chemoresistance in GBM; sensitization of GSCs to temozoliomide (TMZ), the primary chemotherapeutic agent used to treat GBM, is therefore integral for therapeutic efficacy. We previously discovered a unique tumor-specific target, cell surface vimentin (CSV), on patient-derived GSCs. In this study, we found that the anti-CSV monoclonal antibody 86C efficiently increased GSC sensitivity to TMZ. The combination TMZ+86C induced significantly greater antitumor effects than TMZ alone in eight of 12 GSC lines. TMZ+86C-sensitive GSCs had higher CSV expression overall and faster CSV resurfacing among CSV- GSCs compared with TMZ+86C-resistant GSCs. Finally, TMZ+86C increased apoptosis of tumor cells and prolonged survival compared with either drug alone in GBM mouse models. The combination of TMZ+86C represents a promising strategy to reverse GSC chemoresistance.
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Affiliation(s)
- Hyangsoon Noh
- Division of Pediatrics and Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Qingnan Zhao
- Division of Pediatrics and Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Jun Yan
- Division of Pediatrics and Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Ling-Yuan Kong
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Konrad Gabrusiewicz
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Sungguan Hong
- Department of Chemistry, Chung-Ang University, Seoul, 06974, South Korea
| | - Xueqing Xia
- Division of Pediatrics and Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Amy B Heimberger
- Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
| | - Shulin Li
- Division of Pediatrics and Department of Neurosurgery, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA.
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11
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Micko ASG, Höftberger R, Wöhrer A, Millesi M, Knosp E, Wolfsberger S. MGMT assessment in pituitary adenomas: comparison of different immunohistochemistry fixation chemicals. Pituitary 2018; 21:266-273. [PMID: 29344904 PMCID: PMC5942339 DOI: 10.1007/s11102-018-0862-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE Despite the established role of O6-methyl-guanine-DNA methyltransferase (MGMT) as a marker for temozolomide response, consensus of the most reliable method to assess MGMT expression in pituitary adenomas is still missing. Currently, immunohistochemistry (IHC) assessment of formaldehyde fixed tissue samples is most widely used in a semiquantitative description. As formaldehyde fails to completely preserve nucleic acids, RCL2, an alcohol-based formaldehyde-free fixative, has been proposed as a more reliable alternative in terms of cell stability. Furthermore, as the current method of IHC is semiquantitative and observer-dependent, pyrosequencing, an objective tool to evaluate the methylation status of the MGMT promoter, has emerged as a reliable and accurate alternative. The aim of this study was to validate the current IHC method for assessment of MGMT protein expression in pituitary adenomas. METHODS The tissue samples of 8 macroadenomas with positive IHC MGMT expression (> 50%) were investigated: first, we compared the time dependent stability of MGMT protein expression after pituitary adenoma removal between formaldehyde vs. RCL2. Then, we compared positive IHC MGMT expression with methylated promoter status using pyrosequencing. RESULTS In the first 12 h after adenoma removal, tissue samples remained MGMT positive in significantly more samples when fixated with formaldehyde than with RCL2, respectively (96 vs. 81%, p = 0.025). CONCLUSION Our data confirm that the current method using formaldehyde tissue fixation and IHC reveals stable and reliable results of MGMT assessment in pituitary adenomas.
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Affiliation(s)
- Alexander S G Micko
- Department of Neurosurgery, Medical University Vienna, Waehringer Guertel 18-20, 1097, Vienna, Austria
- Institute of Neurology, Medical University of Vienna, Vienna, Austria
| | - Romana Höftberger
- Institute of Neurology, Medical University of Vienna, Vienna, Austria
| | - Adelheid Wöhrer
- Institute of Neurology, Medical University of Vienna, Vienna, Austria
| | - Matthias Millesi
- Department of Neurosurgery, Medical University Vienna, Waehringer Guertel 18-20, 1097, Vienna, Austria
| | - Engelbert Knosp
- Department of Neurosurgery, Medical University Vienna, Waehringer Guertel 18-20, 1097, Vienna, Austria.
| | - Stefan Wolfsberger
- Department of Neurosurgery, Medical University Vienna, Waehringer Guertel 18-20, 1097, Vienna, Austria
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12
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Rao S, Beckman RA, Riazi S, Yabar CS, Boca SM, Marshall JL, Pishvaian MJ, Brody JR, Madhavan S. Quantification and expert evaluation of evidence for chemopredictive biomarkers to personalize cancer treatment. Oncotarget 2018; 8:37923-37934. [PMID: 27888622 PMCID: PMC5514962 DOI: 10.18632/oncotarget.13544] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 11/12/2016] [Indexed: 02/06/2023] Open
Abstract
Predictive biomarkers have the potential to facilitate cancer precision medicine by guiding the optimal choice of therapies for patients. However, clinicians are faced with an enormous volume of often-contradictory evidence regarding the therapeutic context of chemopredictive biomarkers. We extensively surveyed public literature to systematically review the predictive effect of 7 biomarkers claimed to predict response to various chemotherapy drugs: ERCC1-platinums, RRM1-gemcitabine, TYMS-5-fluorouracil/Capecitabine, TUBB3-taxanes, MGMT-temozolomide, TOP1-irinotecan/topotecan, and TOP2A-anthracyclines. We focused on studies that investigated changes in gene or protein expression as predictors of drug sensitivity or resistance. We considered an evidence framework that ranked studies from high level I evidence for randomized controlled trials to low level IV evidence for pre-clinical studies and patient case studies. We found that further in-depth analysis will be required to explore methodological issues, inconsistencies between studies, and tumor specific effects present even within high evidence level studies. Some of these nuances will lend themselves to automation, others will require manual curation. However, the comprehensive cataloging and analysis of dispersed public data utilizing an evidence framework provides a high level perspective on clinical actionability of these protein biomarkers. This framework and perspective will ultimately facilitate clinical trial design as well as therapeutic decision-making for individual patients.
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Affiliation(s)
- Shruti Rao
- Innovation Center for Biomedical Informatics, Georgetown University, Washington, DC, USA
| | - Robert A Beckman
- Innovation Center for Biomedical Informatics, Georgetown University, Washington, DC, USA.,Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA.,Department of Biostatistics, Bioinformatics, and Biomathematics, Georgetown University Medical Center, Washington, DC, USA
| | - Shahla Riazi
- Innovation Center for Biomedical Informatics, Georgetown University, Washington, DC, USA
| | - Cinthya S Yabar
- Pancreas, Biliary and Related Cancer Center, Department of Surgery, Thomas Jefferson University, Philadelphia, PA, USA.,Department of Surgery, Albert Einstein Medical Center, Philadelphia, PA, USA
| | - Simina M Boca
- Innovation Center for Biomedical Informatics, Georgetown University, Washington, DC, USA.,Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA.,Department of Biostatistics, Bioinformatics, and Biomathematics, Georgetown University Medical Center, Washington, DC, USA
| | - John L Marshall
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA.,Otto J. Ruesch Center for the Cure of Gastrointestinal Cancer, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC, USA
| | - Michael J Pishvaian
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA.,Otto J. Ruesch Center for the Cure of Gastrointestinal Cancer, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, DC, USA
| | - Jonathan R Brody
- Pancreas, Biliary and Related Cancer Center, Department of Surgery, Thomas Jefferson University, Philadelphia, PA, USA
| | - Subha Madhavan
- Innovation Center for Biomedical Informatics, Georgetown University, Washington, DC, USA.,Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
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13
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Octyl gallate reduces ATP levels and Ki67 expression leading HepG2 cells to cell cycle arrest and mitochondria-mediated apoptosis. Toxicol In Vitro 2017; 48:11-25. [PMID: 29288082 DOI: 10.1016/j.tiv.2017.12.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 12/09/2017] [Accepted: 12/22/2017] [Indexed: 12/17/2022]
Abstract
Octyl gallate (OG) is an antioxidant that has shown anti-tumor, anti-diabetic and anti-amyloidogenic activities. Mitochondria play an important role in hepatocellular carcinoma, mainly by maintaining accelerated cellular proliferation through the production of ATP. Thus, the mitochondria may be a target for antitumor therapies. Here, we investigated the effects of OG in the hepatocarcinoma cell line (HepG2) and the mechanisms involved. We report, for the first time, that treatment with OG for 24h inhibited HepG2 cell growth by decreasing mitochondrial activity and mass, which led to the reduction of ATP levels. This reduction in the energy supply triggered a decrease in Ki67 protein expression, leading cells to cycle arrest. In addition, treatment with two doses of OG for 48h induced loss of mitochondrial functionality, mitochondrial swelling and apoptosis. Finally, we report that HepG2 cells had no resistance to treatment after multiple doses. Collectively, our findings indicate that metabolic dysregulation and Ki67 protein reduction are key events in the initial anti-proliferative action of OG, whereas mitochondrial swelling and apoptosis induction are involved in the action mechanism of OG after prolonged exposure. This suggests that OG targets mitochondria, thus representing a candidate for further research on therapies for hepatocarcinoma.
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14
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Micko ASG, Wöhrer A, Höftberger R, Vila G, Marosi C, Knosp E, Wolfsberger S. MGMT and MSH6 immunoexpression for functioning pituitary macroadenomas. Pituitary 2017; 20:643-653. [PMID: 28900805 PMCID: PMC5655586 DOI: 10.1007/s11102-017-0829-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE Knowledge of biological behavior is crucial for clinical management of functioning pituitary macroadenomas. For recurrent cases unresponsive to standard treatment, temozolomide (TMZ) has been used as a therapeutic alternative. MGMT (O6-methyl-guanine-DNA methyltransferase) and MSH6 (mutS homolog 6) immunoexpression have been linked to the response to TMZ treatment and MGMT immunoexpression has been additionally linked to early recurrence of non-functioning pituitary adenomas. The aim of this study was to assess the prognostic value of MGMT and MSH6 immunoexpression for aggressive functioning pituitary adenomas. METHODS The study cohort comprised a single center series of 76 patients who underwent an operation for functioning pituitary macroadenoma. We retrospectively compared 38 patients with postoperative persistent or recurrent disease with another set of 38 patients who were in endocrine remission. RESULTS Low-to-moderate MGMT immunoexpression (<50%) was significantly more frequent in the group with persistent/recurrent disease than in cases of endocrine remission (66 vs. 21%, p < 0.001). Furthermore, adenomas with low-to-moderate MGMT immunoexpression were significantly more often recurrent (76 vs. 30%, p < 0.001) and invasive (64 vs. 28%, p = 0.002). CONCLUSION In our series, low-to-moderate MGMT immunoexpression was the only marker that significantly correlated with surgical invasiveness and recurrence in functioning pituitary macroadenomas. Therefore, in the future, MGMT status may be considered an additional marker for understanding the biological behavior of pituitary adenomas.
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Affiliation(s)
- Alexander S G Micko
- Department of Neurosurgery, Medical University Vienna, Waehringer Guertel 18-20, 1097, Vienna, Austria
| | - Adelheid Wöhrer
- Institute of Neurology, Medical University Vienna, Vienna, Austria
| | | | - Greisa Vila
- Division of Endocrinology and Metabolism, Department of Internal Medicine III, Medical University Vienna, Vienna, Austria
| | - Christine Marosi
- Division of Oncology, Department of Internal Medicine I, Medical University of Vienna, Vienna, Austria
| | - Engelbert Knosp
- Department of Neurosurgery, Medical University Vienna, Waehringer Guertel 18-20, 1097, Vienna, Austria.
| | - Stefan Wolfsberger
- Department of Neurosurgery, Medical University Vienna, Waehringer Guertel 18-20, 1097, Vienna, Austria
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15
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Krai J, Beckenkamp A, Gaelzer M, Pohlmann A, Guterres S, Filippi-Chiela E, Salbego C, Buffon A, Beck R. Doxazosin nanoencapsulation improves its in vitro antiproliferative and anticlonogenic effects on breast cancer cells. Biomed Pharmacother 2017; 94:10-20. [DOI: 10.1016/j.biopha.2017.07.048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 06/29/2017] [Accepted: 07/11/2017] [Indexed: 11/26/2022] Open
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16
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Morris JS, Baladandayuthapani V. Statistical Contributions to Bioinformatics: Design, Modeling, Structure Learning, and Integration. STAT MODEL 2017; 17:245-289. [PMID: 29129969 PMCID: PMC5679480 DOI: 10.1177/1471082x17698255] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The advent of high-throughput multi-platform genomics technologies providing whole-genome molecular summaries of biological samples has revolutionalized biomedical research. These technologiees yield highly structured big data, whose analysis poses significant quantitative challenges. The field of Bioinformatics has emerged to deal with these challenges, and is comprised of many quantitative and biological scientists working together to effectively process these data and extract the treasure trove of information they contain. Statisticians, with their deep understanding of variability and uncertainty quantification, play a key role in these efforts. In this article, we attempt to summarize some of the key contributions of statisticians to bioinformatics, focusing on four areas: (1) experimental design and reproducibility, (2) preprocessing and feature extraction, (3) unified modeling, and (4) structure learning and integration. In each of these areas, we highlight some key contributions and try to elucidate the key statistical principles underlying these methods and approaches. Our goals are to demonstrate major ways in which statisticians have contributed to bioinformatics, encourage statisticians to get involved early in methods development as new technologies emerge, and to stimulate future methodological work based on the statistical principles elucidated in this article and utilizing all availble information to uncover new biological insights.
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Affiliation(s)
- Jeffrey S Morris
- Department of Biostatistics, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
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17
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Falletta P, Sanchez-Del-Campo L, Chauhan J, Effern M, Kenyon A, Kershaw CJ, Siddaway R, Lisle R, Freter R, Daniels MJ, Lu X, Tüting T, Middleton M, Buffa FM, Willis AE, Pavitt G, Ronai ZA, Sauka-Spengler T, Hölzel M, Goding CR. Translation reprogramming is an evolutionarily conserved driver of phenotypic plasticity and therapeutic resistance in melanoma. Genes Dev 2017; 31:18-33. [PMID: 28096186 PMCID: PMC5287109 DOI: 10.1101/gad.290940.116] [Citation(s) in RCA: 164] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 12/21/2016] [Indexed: 12/22/2022]
Abstract
The intratumor microenvironment generates phenotypically distinct but interconvertible malignant cell subpopulations that fuel metastatic spread and therapeutic resistance. Whether different microenvironmental cues impose invasive or therapy-resistant phenotypes via a common mechanism is unknown. In melanoma, low expression of the lineage survival oncogene microphthalmia-associated transcription factor (MITF) correlates with invasion, senescence, and drug resistance. However, how MITF is suppressed in vivo and how MITF-low cells in tumors escape senescence are poorly understood. Here we show that microenvironmental cues, including inflammation-mediated resistance to adoptive T-cell immunotherapy, transcriptionally repress MITF via ATF4 in response to inhibition of translation initiation factor eIF2B. ATF4, a key transcription mediator of the integrated stress response, also activates AXL and suppresses senescence to impose the MITF-low/AXL-high drug-resistant phenotype observed in human tumors. However, unexpectedly, without translation reprogramming an ATF4-high/MITF-low state is insufficient to drive invasion. Importantly, translation reprogramming dramatically enhances tumorigenesis and is linked to a previously unexplained gene expression program associated with anti-PD-1 immunotherapy resistance. Since we show that inhibition of eIF2B also drives neural crest migration and yeast invasiveness, our results suggest that translation reprogramming, an evolutionarily conserved starvation response, has been hijacked by microenvironmental stress signals in melanoma to drive phenotypic plasticity and invasion and determine therapeutic outcome.
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Affiliation(s)
- Paola Falletta
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Luis Sanchez-Del-Campo
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Jagat Chauhan
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Maike Effern
- Department of Clinical Chemistry and Clinical Pharmacology, Unit for RNA Biology, University Hospital of Bonn, D-53127 Bonn, Germany
| | - Amy Kenyon
- Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Headington, Oxford OX3 9DS, United Kingdom
| | - Christopher J Kershaw
- Division of Molecular and Cellular Function, School of Biological Sciences, Faculty of Biology, Medicine, and Health, The University of Manchester, Manchester M13 9PT, United Kingdom
| | - Robert Siddaway
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Richard Lisle
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Rasmus Freter
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Matthew J Daniels
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Headington, Oxford OX3 9DU, United Kingdom
| | - Xin Lu
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Thomas Tüting
- Laboratory of Experimental Dermatology, Department of Dermatology and Allergy, University Hospital Magdeburg, 39120 Magdeburg, Germany
| | - Mark Middleton
- Department of Oncology, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Francesca M Buffa
- Department of Oncology, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
| | - Anne E Willis
- Medical Research Council Toxicology Unit, Leicester LE1 9HN, United Kingdom
| | - Graham Pavitt
- Division of Molecular and Cellular Function, School of Biological Sciences, Faculty of Biology, Medicine, and Health, The University of Manchester, Manchester M13 9PT, United Kingdom
| | - Ze'ev A Ronai
- Tumour Initiation and Maintenance Program, Cancer Center, Sanford-Burnham Perbys Medical Discovery Institute, La Jolla, California 92037, USA
| | - Tatjana Sauka-Spengler
- Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, John Radcliffe Hospital, Headington, Oxford OX3 9DS, United Kingdom
| | - Michael Hölzel
- Department of Clinical Chemistry and Clinical Pharmacology, Unit for RNA Biology, University Hospital of Bonn, D-53127 Bonn, Germany
| | - Colin R Goding
- Ludwig Institute for Cancer Research, Nuffield Department of Clinical Medicine, University of Oxford, Headington, Oxford OX3 7DQ, United Kingdom
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18
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Lima KG, Krause GC, Schuster AD, Catarina AV, Basso BS, De Mesquita FC, Pedrazza L, Marczak ES, Martha BA, Nunes FB, Chiela ECF, Jaeger N, Thomé MP, Haute GV, Dias HB, Donadio MVF, De Oliveira JR. Gallic acid reduces cell growth by induction of apoptosis and reduction of IL-8 in HepG2 cells. Biomed Pharmacother 2016; 84:1282-1290. [DOI: 10.1016/j.biopha.2016.10.048] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2016] [Revised: 10/05/2016] [Accepted: 10/17/2016] [Indexed: 11/15/2022] Open
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19
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Kubecek O, Trojanova P, Molnarova V, Kopecky J. Microsatellite instability as a predictive factor for immunotherapy in malignant melanoma. Med Hypotheses 2016; 93:74-6. [DOI: 10.1016/j.mehy.2016.05.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 05/21/2016] [Indexed: 12/21/2022]
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20
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Silva AO, Felipe KB, Villodre ES, Lopez PLC, Lenz G. A guide for the analysis of long-term population growth in cancer. Tumour Biol 2016; 37:13743-13749. [DOI: 10.1007/s13277-016-5255-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 07/15/2016] [Indexed: 11/30/2022] Open
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21
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Filippi-Chiela EC, Bueno e Silva MM, Thomé MP, Lenz G. Single-cell analysis challenges the connection between autophagy and senescence induced by DNA damage. Autophagy 2016; 11:1099-113. [PMID: 25701485 PMCID: PMC4590630 DOI: 10.1080/15548627.2015.1009795] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Autophagy and senescence have been described as central features of cell biology, but the interplay between these mechanisms remains obscure. Using a therapeutically relevant model of DNA damage-induced senescence in human glioma cells, we demonstrated that acute treatment with temozolomide induces DNA damage, a transitory activation of PRKAA/AMPK-ULK1 and MAPK14/p38 and the sustained inhibition of AKT-MTOR. This produced a transient induction of autophagy, which was followed by senescence. However, at the single cell level, this coordinated transition was not observed, and autophagy and senescence were triggered in a very heterogeneous manner. Indeed, at a population level, autophagy was highly negatively correlated with senescence markers, while in single cells this correlation did not exist. The inhibition of autophagy triggered apoptosis and decreased senescence, while its activation increased temozolomide-induced senescence, showing that DNA damage-induced autophagy acts by suppressing apoptosis.
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Key Words
- 3MA, 3-methyladenine
- AMP-activated
- AO, acridine orange
- BafA1, bafilomycin A1
- CDKN1A/p21, cyclin-dependent kinase inhibitor 1A (p21 Cip1)
- CPD, cumulative population doubling
- DDR, DNA damage response
- DFM, drug-free medium
- DNA damage
- H2AFX, H2A histone family
- MAP1LC3A/LC3, microtubule-associated protein 1 light chain 3 α
- MTOR, mechanistic target of rapamycin
- MTORC1, MTOR complex 1
- NA, nuclear area
- NMA, nuclear morphometric analysis
- PRKAA/AMPKα, protein kinase
- RAPA, rapamycin
- RPTOR/RAPTOR, regulatory-associated protein of MTOR
- SA-β-gal, senescence associated β-galactosidase assay
- SQSTM1/p62, sequestosome 1
- TMZ, temozolomide
- autophagy
- cP1-4, cellular population 1 to 4
- complex 1
- member X
- nP1–5, nuclear population 1 to 5
- senescence
- single cell
- temozolomide
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22
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Single-cell analysis challenges the connection between autophagy and senescence induced by DNA damage. Autophagy 2016. [PMID: 25701485 DOI: 10.0180/15548627.2015.1009795] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Autophagy and senescence have been described as central features of cell biology, but the interplay between these mechanisms remains obscure. Using a therapeutically relevant model of DNA damage-induced senescence in human glioma cells, we demonstrated that acute treatment with temozolomide induces DNA damage, a transitory activation of PRKAA/AMPK-ULK1 and MAPK14/p38 and the sustained inhibition of AKT-MTOR. This produced a transient induction of autophagy, which was followed by senescence. However, at the single cell level, this coordinated transition was not observed, and autophagy and senescence were triggered in a very heterogeneous manner. Indeed, at a population level, autophagy was highly negatively correlated with senescence markers, while in single cells this correlation did not exist. The inhibition of autophagy triggered apoptosis and decreased senescence, while its activation increased temozolomide-induced senescence, showing that DNA damage-induced autophagy acts by suppressing apoptosis.
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Key Words
- 3MA, 3-methyladenine
- AMP-activated
- AO, acridine orange
- BafA1, bafilomycin A1
- CDKN1A/p21, cyclin-dependent kinase inhibitor 1A (p21 Cip1)
- CPD, cumulative population doubling
- DDR, DNA damage response
- DFM, drug-free medium
- DNA damage
- H2AFX, H2A histone family
- MAP1LC3A/LC3, microtubule-associated protein 1 light chain 3 α
- MTOR, mechanistic target of rapamycin
- MTORC1, MTOR complex 1
- NA, nuclear area
- NMA, nuclear morphometric analysis
- PRKAA/AMPKα, protein kinase
- RAPA, rapamycin
- RPTOR/RAPTOR, regulatory-associated protein of MTOR
- SA-β-gal, senescence associated β-galactosidase assay
- SQSTM1/p62, sequestosome 1
- TMZ, temozolomide
- autophagy
- cP1-4, cellular population 1 to 4
- complex 1
- member X
- nP1–5, nuclear population 1 to 5
- senescence
- single cell
- temozolomide
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23
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Dugo M, Nicolini G, Tragni G, Bersani I, Tomassetti A, Colonna V, Del Vecchio M, De Braud F, Canevari S, Anichini A, Sensi M. A melanoma subtype with intrinsic resistance to BRAF inhibition identified by receptor tyrosine kinases gene-driven classification. Oncotarget 2016; 6:5118-33. [PMID: 25742786 PMCID: PMC4467137 DOI: 10.18632/oncotarget.3007] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 12/21/2014] [Indexed: 02/07/2023] Open
Abstract
Dysregulation of receptor tyrosine kinases (RTKs) contributes to several aspects of oncogenesis including drug resistance. In melanoma, distinct RTKs have been involved in BRAF inhibitors (BRAFi) resistance, yet the utility of RTKs expression pattern to identify intrinsically resistant tumors has not been assessed. Transcriptional profiling of RTKs and integration with a previous classification, reveals three robust subtypes in two independent datasets of melanoma cell lines and one cohort of melanoma samples. This classification was validated by Western blot in a panel of patient-derived melanoma cell lines. One of the subtypes identified here for the first time displayed the highest and lowest expression of EGFR and ERBB3, respectively, and included BRAF-mutant tumors all intrinsically resistant to BRAFi PLX4720, as assessed by analysis of the Cancer Cell Line Encyclopedia pharmacogenomic study and by in vitro growth inhibition assays. High levels of EGFR were detected, even before therapy, in tumor cells of one of three melanoma patients unresponsive to BRAFi. Use of different pharmacological inhibitors highlighted the relevance of PI3K/mTOR signaling for growth of this PLX4720-resistant subtype. Our results identify a specific molecular profile of melanomas intrinsically resistant to BRAFi and suggest the PI3K/mTOR pathway as a potential therapeutic target for these tumors.
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Affiliation(s)
- Matteo Dugo
- Functional Genomics and Bioinformatics, Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Gabriella Nicolini
- Unit of Immunobiology of Human Tumors, Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Gabrina Tragni
- Department of Pathology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Ilaria Bersani
- Unit of Immunobiology of Human Tumors, Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Antonella Tomassetti
- Unit of Molecular Therapies, Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Valentina Colonna
- Department of Clinical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Michele Del Vecchio
- Department of Clinical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Filippo De Braud
- Department of Clinical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Silvana Canevari
- Functional Genomics and Bioinformatics, Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Andrea Anichini
- Unit of Immunobiology of Human Tumors, Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Marialuisa Sensi
- Functional Genomics and Bioinformatics, Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.,Unit of Immunobiology of Human Tumors, Department of Experimental Oncology and Molecular Medicine, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
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24
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Wald N, Le Corre Y, Martin L, Mathieu V, Goormaghtigh E. Infrared spectra of primary melanomas can predict response to chemotherapy: The example of dacarbazine. Biochim Biophys Acta Mol Basis Dis 2015; 1862:174-81. [PMID: 26577766 DOI: 10.1016/j.bbadis.2015.10.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 09/24/2015] [Accepted: 10/27/2015] [Indexed: 01/24/2023]
Abstract
Metastatic melanomas are highly aggressive and median survival is 6-9months for stage IV patients in the absence of treatment with anti-tumor activity. Dacarbazine is an alkylating agent that has been widely used in the treatment of metastatic melanomas and that could be still used in combination with targeted or immune therapies. Indeed, therapeutic benefits of these treatments in monotherapy are poor and one option to improve them is to combine drugs and/or to better anticipate the individual response to a defined treatment. To our best knowledge and to date, there is no test available to predict the response of a patient to dacarbazine. We show here that examination of melanoma histological sections by infrared micro-spectroscopy reveals the sensitivity of the cancer to dacarbazine. Unsupervised analysis of the FTIR spectra evidences spontaneous and significant clustering of infrared spectra into two groups that match the clinical responsiveness of the patients to dacarbazine used as a first-line treatment. A supervised model resulted in 83% of the patient status (responder/non-responder) being correctly identified. The spectra revealed a key modification in the nature and quantity of lipids in the cells of both groups.
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Affiliation(s)
- N Wald
- Laboratory for the Structure and Function of Biological Membranes, Center for Structural Biology and Bioinformatics, Université Libre de Bruxelles, Brussels, Belgium.
| | - Y Le Corre
- Department of Dermatology, Angers University Hospital, Angers, France
| | - L Martin
- Department of Dermatology, Angers University Hospital, Angers, France
| | - V Mathieu
- Laboratoire de Cancérologie et Toxicologie Expérimentale, Faculté de Pharmacie, Université Libre de Bruxelles, Brussels, Belgium
| | - E Goormaghtigh
- Laboratory for the Structure and Function of Biological Membranes, Center for Structural Biology and Bioinformatics, Université Libre de Bruxelles, Brussels, Belgium
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25
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Barciszewska AM, Gurda D, Głodowicz P, Nowak S, Naskręt-Barciszewska MZ. A New Epigenetic Mechanism of Temozolomide Action in Glioma Cells. PLoS One 2015; 10:e0136669. [PMID: 26309255 PMCID: PMC4550362 DOI: 10.1371/journal.pone.0136669] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 08/05/2015] [Indexed: 01/15/2023] Open
Abstract
Temozolomide (TMZ) is an oral alkylating chemotherapeutic agent that prolongs the survival of patients with glioblastoma (GBM). Despite that high TMZ potential, progression of disease and recurrence are still observed. Therefore a better understanding of the mechanism of action of this drug is necessary and may allow more durable benefit from its anti-glioma properties. Using nucleotide post-labelling method and separation on thin-layer chromatography we measured of global changes of 5-methylcytosine (m5C) in DNA of glioma cells treated with TMZ. Although m5C is not a product of TMZ methylation reaction of DNA, we analysed the effects of the drug action on different glioma cell lines through global changes at the level of the DNA main epigenetic mark. The first effect of TMZ action we observed is DNA hypermethylation followed by global demethylation. Therefore an increase of DNA methylation and down regulation of some genes expression can be ascribed to activation of DNA methyltransferases (DNMTs). On the other hand hypomethylation is induced by oxidative stress and causes uncontrolled expression of pathologic protein genes. The results of brain tumours treatment with TMZ suggest the new mechanism of modulation epigenetic marker in cancer cells. A high TMZ concentration induced a significant increase of m5C content in DNA in the short time, but a low TMZ concentration at longer time hypomethylation is observed for whole range of TMZ concentrations. Therefore TMZ administration with low doses of the drug and short time should be considered as optimal therapy.
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Affiliation(s)
- Anna-Maria Barciszewska
- Department of Neurosurgery and Neurotraumatology, Karol Marcinkowski University of Medical Sciences, Przybyszewskiego 49, 60–355, Poznan, Poland
| | - Dorota Gurda
- Institute of Bioorganic Chemistry of the Polish Academy of Sciences, Noskowskiego 12, 61–704, Poznan, Poland
| | - Paweł Głodowicz
- Institute of Bioorganic Chemistry of the Polish Academy of Sciences, Noskowskiego 12, 61–704, Poznan, Poland
| | - Stanisław Nowak
- Department of Neurosurgery and Neurotraumatology, Karol Marcinkowski University of Medical Sciences, Przybyszewskiego 49, 60–355, Poznan, Poland
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26
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Egger ME, McNally LR, Nitz J, McMasters KM, Gomez-Gutierrez JG. Adenovirus-mediated FKHRL1/TM sensitizes melanoma cells to apoptosis induced by temozolomide. HUM GENE THER CL DEV 2015; 25:186-95. [PMID: 25238278 DOI: 10.1089/humc.2014.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Melanoma exhibits variable resistance to the alkylating agent temozolomide (TMZ). We evaluated the potential of adenovirus expressing forkhead human transcription factor like 1 triple mutant (Ad-FKHRL1/TM) to sensitize melanoma cells to TMZ. Four melanoma cell lines were treated with Ad-FKHRL1/TM and TMZ, alone or in combination. Apoptosis was assessed by activation and inhibition of caspase pathway, nuclei fragmentation, and annexin V staining. The potential therapeutic efficacy of Ad-FKHRL1/TM with TMZ was also assessed in a mouse melanoma xenograft model. Combination therapy of Ad-FKHRL1/TM and TMZ resulted in greater cell killing (<20% cell viability) compared with single therapy and controls (p<0.05). Combination indices of Ad-FKHRL1/TM and TMZ therapy indicated significant (p<0.05) synergistic killing effect. Greater apoptosis induction was found in cells treated with Ad-FKHRL1/TM and TMZ than with Ad-FKHRL1/TM or TMZ-treated cells alone. Treatment with TMZ enhanced adenovirus transgene expression in a cell type-dependent manner. In an in vivo model, combination therapy of Ad-FKHRL1/TM with TMZ results in greater tumor growth reduction in comparison with single treatments. We suggest that Ad-FKHRL1/TM is a promising vector to sensitize melanoma cells to TMZ, and that a combination of both approaches would be effective in the clinical setting.
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Affiliation(s)
- Michael E Egger
- 1 The Hiram C. Polk Jr., MD, Department of Surgery, University of Louisville School of Medicine , Louisville, KY 40292
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27
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Martinho O, Vilaça N, Castro PJG, Amorim R, Fonseca AM, Baltazar F, Reis RM, Neves IC. In vitro and in vivo studies of temozolomide loading in zeolite structures as drug delivery systems for glioblastoma. RSC Adv 2015. [DOI: 10.1039/c5ra03871e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Y and MOR zeolites were used as a host for the temozolomide (TMZ). Y presented toxicity to glioblastoma cancer cells in contrast to MOR. Higher potentiation of TMZ was obtained with MOR in comparison to free TMZ bothin vitroandin vivo.
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Affiliation(s)
- Olga Martinho
- Life and Health Sciences Research Institute (ICVS)
- School of Health Sciences
- University of Minho
- Braga
- Portugal
| | - Natália Vilaça
- Centre of Chemistry
- Chemistry Department
- University of Minho
- 4710-057 Braga
- Portugal
| | - Paulo J. G. Castro
- Centre of Chemistry
- Chemistry Department
- University of Minho
- 4710-057 Braga
- Portugal
| | - Ricardo Amorim
- Life and Health Sciences Research Institute (ICVS)
- School of Health Sciences
- University of Minho
- Braga
- Portugal
| | - António M. Fonseca
- Centre of Chemistry
- Chemistry Department
- University of Minho
- 4710-057 Braga
- Portugal
| | - Fátima Baltazar
- Life and Health Sciences Research Institute (ICVS)
- School of Health Sciences
- University of Minho
- Braga
- Portugal
| | - Rui M. Reis
- Life and Health Sciences Research Institute (ICVS)
- School of Health Sciences
- University of Minho
- Braga
- Portugal
| | - Isabel C. Neves
- Centre of Chemistry
- Chemistry Department
- University of Minho
- 4710-057 Braga
- Portugal
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Kamat N, Khidhir MA, Hussain S, Alashari MM, Rannug U. Chemotherapy induced microsatellite instability and loss of heterozygosity in chromosomes 2, 5, 10, and 17 in solid tumor patients. Cancer Cell Int 2014; 14:118. [PMID: 25493073 PMCID: PMC4260186 DOI: 10.1186/s12935-014-0118-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 10/27/2014] [Indexed: 01/05/2023] Open
Abstract
Background The inevitable side effects of the currently used chemotherapy are associated with serious syndromes. Genotoxic effects and consequent genetic instability may play an important role in these syndromes. The aim of the study was to evaluate chemotherapy-related microsatellite instability (MSI), loss of heterozygosity (LOH), and loss of mismatch repair (MMR) expression in solid tumor patients. Methods Samples were collected from 117 de novo patients with solid tumors of different origins. Specimens, taken pre- and post-treatment, were screened for MSI and LOH in 10 microsatellite sequences in blood, and expression of five MMR proteins were analyzed in cancer tissues using immunohistochemistry. Statistical analysis included the use of; Fisher’s exact test, Chi Square, and an inter-rater reliability test using Cohen’s kappa coefficient. Results Microsatellite analysis showed that 66.7% of the patients had MSI, including 23.1% high-positive MSI and 43.6% low-positive MSI. A large portion (41%) of the patients exhibited LOH in addition to MSI. MSI and LOH were detected in seven loci in which incidence rates ranged from 3.8% positive for Bat-26 to 34.6% positive for Tp53-Alu. Immunohistochemistry revealed that human mutL homolog 1 (hMLH1) expression was deficient in 29.1% of the patients, whereas 18.8%, 23.9%, 13.4%, and 9.7% were deficient for human mutS homolog 2 (hMSH2), P53, human mutS homolog 6 (hMSH6) and human post-meiotic segregation increased 2 (hPMS2), respectively. There was a significant correlation between MSI and LOH incidence in Tp53-Alu, Mfd41, and APC with low or deficient expression of hMLH1, hMSH2, and P53. A significant association between MSI and LOH, and incidence of secondary tumors was also evident. Conclusions The negative correlation between MMR expression, MSI, and LOH and increased resistance to anti-cancer drugs and development of secondary cancers demonstrates a useful aid in early detection of potential chemotherapy-related side-effects. The diagnostic value demonstrated in our earlier study on breast cancer patients was confirmed for other solid tumors. Electronic supplementary material The online version of this article (doi:10.1186/s12935-014-0118-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Nasir Kamat
- Department of Molecular Biosciences, the Wenner-Gren Institute (MBW), Stockholm University, SE-106 91 Stockholm, Sweden
| | - Mohammed A Khidhir
- Department of Genetics Research, Management of Natural Conservations, AlAin City, UAE
| | - Sabir Hussain
- Department of Oncology and Hematology, Tawam Hospital, AlAin City, UAE
| | - Mouied M Alashari
- Department of Pathology, University of Utah, Salt Lake City, Utah 84112 USA
| | - Ulf Rannug
- Department of Molecular Biosciences, the Wenner-Gren Institute (MBW), Stockholm University, SE-106 91 Stockholm, Sweden
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29
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Beasley GM, Speicher P, Augustine CK, Dolber PC, Peterson BL, Sharma K, Mosca PJ, Royal R, Ross M, Zager JS, Tyler DS. A multicenter phase I dose escalation trial to evaluate safety and tolerability of intra-arterial temozolomide for patients with advanced extremity melanoma using normothermic isolated limb infusion. Ann Surg Oncol 2014; 22:287-94. [PMID: 25145500 DOI: 10.1245/s10434-014-3887-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Indexed: 11/18/2022]
Abstract
BACKGROUND L-phenylalanine mustard (LPAM) has been the standard for use in regional chemotherapy (RC) for unresectable in-transit melanoma. Preclinical data demonstrated that regional temozolomide (TMZ) may be more effective. METHODS Patients with AJCC Stage IIIB or IIIC extremity melanoma who failed previous LPAM-based RC were treated with TMZ via isolated limb infusion (ILI) according to a modified accelerated titration design. Drug pharmacokinetic (PK) analysis, tumor gene expression, methylation status of the O6-methylguanine methyltransferase (MGMT) promoter, and MGMT expression were evaluated. Primary objectives were to (1) determine dose-limiting toxicities (DLTs) and maximum tolerated dose (MTD) of TMZ via ILI and (2) explore biomarker correlates of response. RESULTS 28 patients completed treatment over 2.5 years at 3 institutions. 19 patients were treated at the MTD defined as 3,200 mg/m(2) [multiplied by 0.09 (arm), 0.18 (leg)]. Two of five patients had DLTs at the 3,600 mg/m(2) level while only grade 1 (n = 15) and grade 2 (n = 4) clinical toxicities occurred at the MTD. At 3-month post-ILI, 10.5 % (2/19) had CR, 5.3 % (1/19) had PR, 15.8 % (3/19) had SD, and 68.4 % (13/19) had PD. Neither PK parameters of TMZ nor MGMT levels were associated with response or toxicity. CONCLUSION In this first ever use of intra-arterial TMZ in ILI for melanoma, the MTD was determined. While we could not define a marker for TMZ response, the minimal toxicity of TMZ ILI may allow for repeated treatments to increase the response rate as well as clarify the role of MGMT expression.
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Affiliation(s)
- Georgia M Beasley
- Department of Surgery, Duke University Medical Center, Durham, NC, USA,
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30
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Progression of O⁶-methylguanine-DNA methyltransferase and temozolomide resistance in cancer research. Mol Biol Rep 2014; 41:6659-65. [PMID: 24990698 DOI: 10.1007/s11033-014-3549-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 06/20/2014] [Indexed: 12/12/2022]
Abstract
Temozolomide (TMZ) is an alkylating agent that is widely used in chemotherapy for cancer. A key mechanism of resistance to TMZ is the overexpression of O(6)-methylguanine-DNA methyltransferase (MGMT). MGMT specifically repairs the DNA O(6)-methylation damage induced by TMZ and irreversibly inactivates TMZ. Regulation of MGMT expression and research regarding the mechanism of TMZ resistance will help rationalize the clinical use of TMZ. In this review, we provide an overview of recent advances in the field, with particular emphasis on MGMT structure, function, expression regulation, and the association between MGMT and resistance to TMZ.
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31
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Brown MC, Dobrikova EY, Dobrikov MI, Walton RW, Gemberling SL, Nair SK, Desjardins A, Sampson JH, Friedman HS, Friedman AH, Tyler DS, Bigner DD, Gromeier M. Oncolytic polio virotherapy of cancer. Cancer 2014; 120:3277-86. [PMID: 24939611 DOI: 10.1002/cncr.28862] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2014] [Accepted: 05/13/2014] [Indexed: 01/23/2023]
Abstract
Recently, the century-old idea of targeting cancer with viruses (oncolytic viruses) has come of age, and promise has been documented in early stage and several late-stage clinical trials in a variety of cancers. Although originally prized for their direct tumor cytotoxicity (oncolytic virotherapy), recently, the proinflammatory and immunogenic effects of viral tumor infection (oncolytic immunotherapy) have come into focus. Indeed, a capacity for eliciting broad, sustained antineoplastic effects stemming from combined direct viral cytotoxicity, innate antiviral activation, stromal proinflammatory stimulation, and recruitment of adaptive immune effector responses is the greatest asset of oncolytic viruses. However, it also is the source for enormous mechanistic complexity that must be considered for successful clinical translation. Because of fundamentally different relationships with their hosts (malignant or not), diverse replication strategies, and distinct modes of tumor cytotoxicity/killing, oncolytic viruses should not be referred to collectively. These agents must be evaluated based on their individual merits. In this review, the authors highlight key mechanistic principles of cancer treatment with the polio:rhinovirus chimera PVSRIPO and their implications for oncolytic immunotherapy in the clinic.
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Affiliation(s)
- Michael C Brown
- Department of Surgery, Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina; Division of Neurosurgery Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina; Department of Molecular Genetics and Microbiology, Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina
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Azimi A, Pernemalm M, Frostvik Stolt M, Hansson J, Lehtiö J, Egyházi Brage S, Hertzman Johansson C. Proteomics analysis of melanoma metastases: association between S100A13 expression and chemotherapy resistance. Br J Cancer 2014; 110:2489-95. [PMID: 24722184 PMCID: PMC4021518 DOI: 10.1038/bjc.2014.169] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 03/01/2014] [Accepted: 03/05/2014] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Disseminated cutaneous malignant melanoma (CMM) is commonly unresponsive to standard chemotherapies, and there are as yet no predictive markers of therapy response. METHODS In the present study we collected fresh-frozen pretreatment lymph-node metastasis samples (n=14) from melanoma patients with differential response to dacarbazine (DTIC) or temozolomide (TMZ) chemotherapy, to identify proteins with an impact on treatment response. We performed quantitative protein profiling using tandem mass spectrometry and compared the proteome differences between responders (R) and non-responders (NR), matched for age, gender and histopathological type of CMM. RESULTS Biological pathway analyses showed several signalling pathways differing between R vs NR, including Rho signalling. Gene expression profiling data was available for a subset of the samples, and the results were compared with the proteomics data. Four proteins with differential expression between R and NR were selected for technical validation by immunoblotting (ISYNA1, F13A1, CSTB and S100A13), and CSTB and S100A13 were further validated on a larger sample set by immunohistochemistry (n=48). The calcium binding protein S100A13 was found to be significantly overexpressed in NR compared with R in all analyses performed. CONCLUSIONS Our results suggest that S100A13 is involved in CMM resistance to DTIC/TMZ.
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Affiliation(s)
- A Azimi
- Department of Oncology-Pathology, Karolinska Institutet, CCK R8:03, Karolinska University Hospital, Solna, S-17176 Stockholm, Sweden
| | - M Pernemalm
- Department of Oncology-Pathology, Karolinska Institutet, Science for Life Laboratory, Tomtebodavägen 23, S-17165 Solna, Sweden
| | - M Frostvik Stolt
- Department of Oncology-Pathology, Karolinska Institutet, CCK R8:03, Karolinska University Hospital, Solna, S-17176 Stockholm, Sweden
| | - J Hansson
- Department of Oncology-Pathology, Karolinska Institutet, CCK R8:03, Karolinska University Hospital, Solna, S-17176 Stockholm, Sweden
| | - J Lehtiö
- Department of Oncology-Pathology, Karolinska Institutet, Science for Life Laboratory, Tomtebodavägen 23, S-17165 Solna, Sweden
| | - S Egyházi Brage
- Department of Oncology-Pathology, Karolinska Institutet, CCK R8:03, Karolinska University Hospital, Solna, S-17176 Stockholm, Sweden
| | - C Hertzman Johansson
- Department of Oncology-Pathology, Karolinska Institutet, CCK R8:03, Karolinska University Hospital, Solna, S-17176 Stockholm, Sweden
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Brakha C, Arvers P, Villiers F, Marlu A, Buhot A, Livache T, Calemczuk R, Zarski JP, Villiers CL, Marche PN, Villiers MB. Relationship between humoral response against hepatitis C virus and disease overcome. SPRINGERPLUS 2014; 3:56. [PMID: 24516785 PMCID: PMC3915053 DOI: 10.1186/2193-1801-3-56] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 12/23/2013] [Indexed: 12/11/2022]
Abstract
Abstract Hepatitis C virus infection leads to liver disease whose severity can range from mild to serious lifelong illness. However the parameters involved in the evolution of the disease are still unknown. Among other factors, the virus-elicited antibody profile is suspected to play a role in the outcome of the disease. Analysis of the relationship between anti-virus antibodies and disease state requires the analysis of a large number of serums from patients (hepatitis C virus+) and of epitopes from the viral proteins. Such a study would benefit from microarray-based screening systems that are appropriate for high-throughput assays. We used a method combining peptide chips and surface plasmon resonance imaging previously shown to be suitable for analyzing complex mediums and detecting peptide-protein interactions. 56 peptides covering the entire viral proteome were grafted on chips and their interaction with antibodies present in the 68 injected serums from infected and non-infected donors was measured. Statistical analyses were conducted to determine a possible relationship between antibodies (specificity and amount) and disease states. A good discrimination between infected and non-infected donors validated our approach, and several correlations between antibodies profiles and clinical parameters have been identified. In particular, we demonstrated that ratios between particular antibodies levels allow for accurate discrimination of patients according to their pathologic states. Conclusion Humoral response against hepatitis C virus linear epitopes is partly modified according to the disease state. This study highlights the importance of considering relative quantities of antibodies with different specificities rather than the amount of each antibody. Electronic supplementary material The online version of this article (doi: 10.1186/2193-1801-3-56) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Carine Brakha
- INSERM, U823, Institut A. Bonniot, BP 170 Cedex 9, F-38042 Grenoble, France ; Université J. Fourier, UMR-823, F-38042 Grenoble, France
| | - Philippe Arvers
- HIA Desgenettes, 108 Bd Pinel Cedex 03, Lyon, F-69275 France
| | - Florent Villiers
- Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, MD 20742 USA
| | - Alice Marlu
- Pôle Digidune, Centre Hospitalier Universitaire de Grenoble, La Tronche, F-38700 France
| | - Arnaud Buhot
- INAC, SPrAM (UMR 5819, CEA, CNRS, UJF), INAC/CEA Cedex 09, Grenoble, F-38054 France
| | - Thierry Livache
- INAC, SPrAM (UMR 5819, CEA, CNRS, UJF), INAC/CEA Cedex 09, Grenoble, F-38054 France
| | - Roberto Calemczuk
- INAC, SPrAM (UMR 5819, CEA, CNRS, UJF), INAC/CEA Cedex 09, Grenoble, F-38054 France
| | - Jean-Pierre Zarski
- Pôle Digidune, Centre Hospitalier Universitaire de Grenoble, La Tronche, F-38700 France
| | - Christian L Villiers
- INSERM, U823, Institut A. Bonniot, BP 170 Cedex 9, F-38042 Grenoble, France ; Université J. Fourier, UMR-823, F-38042 Grenoble, France
| | - Patrice N Marche
- INSERM, U823, Institut A. Bonniot, BP 170 Cedex 9, F-38042 Grenoble, France ; Université J. Fourier, UMR-823, F-38042 Grenoble, France
| | - Marie-Bernadette Villiers
- INSERM, U823, Institut A. Bonniot, BP 170 Cedex 9, F-38042 Grenoble, France ; Université J. Fourier, UMR-823, F-38042 Grenoble, France
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Wang W, Baggerly KA, Knudsen S, Askaa J, Mazin W, Coombes KR. Independent validation of a model using cell line chemosensitivity to predict response to therapy. J Natl Cancer Inst 2013; 105:1284-91. [PMID: 23964133 DOI: 10.1093/jnci/djt202] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Methods using cell line microarray and drug sensitivity data to predict patients' chemotherapy response are appealing, but groups may be reluctant to release details to preserve intellectual property. Here we describe a case study to validate predictions while treating the methods as a "black box." METHODS Medical Prognosis Institute (MPI) constructed cell-line-derived sensitivity scores (SSs) and combined scores (CSs) that incorporate clinical variables. MD Anderson researchers evaluated their predictions. We searched the Gene Expression Omnibus (GEO) to identify validation datasets, and we performed statistical evaluation of the agreement between prediction and clinical observation. RESULTS We identified 3 suitable datasets: GSE16446 (n = 120; binary outcome), GSE17920 (n = 130; binary outcome), and GSE10255 (n = 161; continuous and time-to-event outcomes). The SS was statistically significantly associated with primary treatment responses for all studies (GSE16446: P = .02; GSE17920: P = .02; GSE10255: P = .02). Dichotomized SSs performed no better than chance for GSE16446 and GSE17920, and categorized SSs did not predict disease-free survival (GSE10255). SSs sometimes improved on predictions using clinical variables (GSE16446: P = .05; GSE17920: P = .31; GSE10255: P = .045), but gains were limited (95% confidence intervals for GSE16446 and GSE17920 include 0). The CS did not predict treatment response for GSE16446 (P = .55), but it did for GSE17920 (P < .001). Coefficients of clinical variables provided by MPI for CSs agree with estimates for GSE17920 better than estimates for GSE16446. CONCLUSIONS Model predictions were better than chance in all three datasets. However, these scores added little to existing clinical predictors; statistically significant contributions were likely to be too small to change clinical practice. These findings suggest that discovering better predictors will require both cell line data and a clinical training dataset of patient samples.
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Affiliation(s)
- Wenting Wang
- Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, TX 77230, USA
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Thomas M, Poignée-Heger M, Weisser M, Wessner S, Belousov A. An optimized workflow for improved gene expression profiling for formalin-fixed, paraffin-embedded tumor samples. J Clin Bioinforma 2013; 3:10. [PMID: 23641797 PMCID: PMC3660273 DOI: 10.1186/2043-9113-3-10] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 04/23/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Whole genome microarray gene expression profiling is the 'gold standard' for the discovery of prognostic and predictive genetic markers for human cancers. However, suitable research material is lacking as most diagnostic samples are preserved as formalin-fixed, paraffin-embedded tissue (FFPET). We tested a new workflow and data analysis method optimized for use with FFPET samples. METHODS Sixteen breast tumor samples were split into matched pairs and preserved as FFPET or fresh-frozen (FF). Total RNA was extracted and tested for yield and purity. RNA from FFPET samples was amplified using three different commercially available kits in parallel, and hybridized to Affymetrix GeneChip® Human Genome U133 Plus 2.0 Arrays. The array probe set was optimized in silico to exclude misdesigned and misannotated probes. RESULTS FFPET samples processed using the WT-Ovation™ FFPE System V2 (NuGEN) provided 80% specificity and 97% sensitivity compared with FF samples (assuming values of 100%). In addition, in silico probe set redesign improved sequence detection sensitivity and, thus, may rescue potentially significant small-magnitude gene expression changes that could otherwise be diluted by the overall probe set background. CONCLUSION In conclusion, our FFPET-optimized workflow enables the detection of more genes than previous, nonoptimized approaches, opening new possibilities for the discovery, validation, and clinical application of mRNA biomarkers in human diseases.
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Affiliation(s)
- Marlene Thomas
- Pharma Research and Early Development (pRED), Roche Diagnostics GmbH, TR-H, Bldg 231/206a, Nonnenwald 2, 82377 Penzberg, Germany.
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Tsamardinos I, Borboudakis G, Christodoulou EG, Røe OD. Chemosensitivity Prediction of Tumours based on Expression, miRNA, and Proteomics Data. Bioinformatics 2013. [DOI: 10.4018/978-1-4666-3604-0.ch032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
The chemosensitivity of tumours to specific drugs can be predicted based on molecular quantities, such as gene expressions, miRNA expressions, and protein concentrations. This finding is important for improving drug efficacy and personalizing drug use. In this paper, the authors present an analysis strategy that, compared to prior work, retains more information in the data for analysis and may lead to improved chemosensitivity prediction. The authors apply improved methods for estimating the GI50 value of a drug (an indicator of the response to the drug), regression methods for constructing predictive models of the GI50 value, advanced variable selection techniques, such as MMPC, and a multi-task variable selection technique for identifying a small-size signature that is simultaneously predictive for several drugs and cell lines. The methods are applied on gene expression, miRNA expression, and proteomics data from 53 tumour cell lines after treatment with 120 drugs, obtained from the National Cancer Institute databases. A biological interpretation and discussion of the results is presented for the most clinically important subset of 14 drugs.
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Affiliation(s)
| | | | | | - O. D. Røe
- Levanger Hospital—Nord-Trøndelag Health Trust, Norway, & Norwegian University of Science and Technology, Norway
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Immunohistochemical analysis of O(6)-methylguanine-DNA methyltransferase in human melanoma in comparison with skin squamous cell carcinoma. Med Mol Morphol 2013; 47:8-13. [PMID: 23460078 DOI: 10.1007/s00795-013-0030-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 12/06/2012] [Indexed: 10/27/2022]
Abstract
Alkylating agents, often used for chemotherapy in patients with melanoma, can produce O(6)-alkylguanine (O(6)AG) which is related to tumor cell killing after treatment with alkylating agents. O(6)AG is effectively eliminated by O(6)-methylguanine-DNA methyltransferase (O(6)MGMT) and its level is correlative to the resistance to alkylating agents. However, little is known about the relationship of O(6)MGMT to the characteristics of melanoma. This study investigated the expression of O(6)MGMT in 12 melanomas and compared it with that in 11 skin squamous cell cancers (SCCs) immunohistochemically to evaluate the O(6)MGMT activity in melanoma and its clinical significance. All of the SCC samples had high O(6)MGMT expression, while the expression of O(6)MGMT in melanoma was diverse and 4 out of 12 samples had no or extremely low O(6)MGMT activity. Out of 6 lesions obtained from metastasis, 4 had a high O(6)MGMT activity. Two out of 3 cases with a low O(6)MGMT activity in each primary lesion did not show any evidence of metastasis or local recurrence. The evaluation of O(6)MGMT activity in melanoma may, therefore, be useful to determine the characteristics of tumor in each melanoma case. In addition, the present study implies the possibility of selective cancer chemotherapy for melanoma in the near future.
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Ruban A, Berkutzki T, Cooper I, Mohar B, Teichberg VI. Blood glutamate scavengers prolong the survival of rats and mice with brain-implanted gliomas. Invest New Drugs 2012; 30:2226-35. [PMID: 22392507 PMCID: PMC3484283 DOI: 10.1007/s10637-012-9799-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2011] [Accepted: 01/10/2012] [Indexed: 10/28/2022]
Abstract
L-Glutamate (Glu) plays a crucial role in the growth of malignant gliomas. We have established the feasibility of accelerating a naturally occurring brain to-blood Glu efflux by decreasing blood Glu levels with intravenous oxaloacetate, the respective Glu co-substrate of the blood resident enzyme humane glutamate–oxaloacetate transaminase(hGOT). We wished to demonstrate that blood Glu scavenging provides neuroprotection in the case of glioma.We now describe the neuroprotective effects of blood Glu scavenging in a fatal condition such as brain-implanted C6 glioma in rats and brain-implanted human U87 MG glioma in nude mice. Rat (C-6) or human (U87) glioma cells were grafted stereotactically in the brain of rats or mice. After development of tumors, the animals were drinking oxaloacetate with or without injections of hGOT. In addition, mice were treated with combination treatment, which included drinking oxaloacetate with intracutaneous injections of hGOT and intraperitoneal injection of Temozolomide. Animals drinking oxaloacetate with or without injections of hGOT displayed a smaller tumor volume, reduced invasiveness and prolonged survival than control animals drinking saline. These effects were significantly enhanced by Temozolomide in mice, which increased survival by 237%. This is the first demonstration of blood Glu scavenging in brain cancer, and because of its safety, is likely to be of clinical significance for the future treatment of human gliomas. As we demonstrated, the blood glutamate scavenging treatment in combination with TMZ could be a good candidate or as an alternative treatment to the patients that do not respond to TMZ.
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Affiliation(s)
- Angela Ruban
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot 76100, Israel.
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Shen K, Qi Y, Song N, Tian C, Rice SD, Gabrin MJ, Brower SL, Symmans WF, O'Shaughnessy JA, Holmes FA, Asmar L, Pusztai L. Cell line derived multi-gene predictor of pathologic response to neoadjuvant chemotherapy in breast cancer: a validation study on US Oncology 02-103 clinical trial. BMC Med Genomics 2012; 5:51. [PMID: 23158478 PMCID: PMC3536618 DOI: 10.1186/1755-8794-5-51] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Accepted: 11/12/2012] [Indexed: 02/03/2023] Open
Abstract
Background The purpose of this study is to assess the predictive accuracy of a multi-gene predictor of response to docetaxel, 5-fluorouracil, epirubicin and cyclophosphamide combination chemotherapy on gene expression data from patients who received these drugs as neoadjuvant treatment. Methods Tumor samples were obtained from patients with stage II-III breast cancer before starting neoadjuvant chemotherapy with four cycles of 5-fluorouracil/epirubicin/cyclophosphamide (FEC) followed by four cycles of docetaxel/capecitabine (TX) on US Oncology clinical trial 02-103. Most patients with HER-2-positive cancer also received trastuzumab (H). The chemotherapy predictor (TFEC-MGP) was developed from publicly available gene expression data of 42 breast cancer cell-lines with corresponding in vitro chemotherapy sensitivity results for the four chemotherapy drugs. No predictor was developed for treatment with trastuzumab. The predictive performance of TFEC-MGP in distinguishing cases with pathologic complete response from those with residual disease was evaluated for the FEC/TX and FEC/TX plus H group separately. The area under the receiver-operating characteristic curve (AU-ROC) was used as the metric of predictive performance. Genomic predictions were performed blinded to clinical outcome. Results The AU-ROC was 0.70 (95% CI: 0.57-0.82) for the FEC/TX group (n=66) and 0.43 (95% CI: 0.20-0.66) for the FEC/TX plus H group (n=25). Among the patients treated with FEC/TX, the AU-ROC was 0.69 (95% CI: 0.52-0.86) for estrogen receptor (ER)-negative (n=28) and it was 0.59 (95% CI: 0.36-0.82) for ER-positive cancers (n=37). ER status was not reported for one patient. Conclusions Our results indicate that the cell line derived 291-probeset genomic predictor of response to FEC/TX combination chemotherapy shows good performance in a blinded validation study, particularly in ER-negative patients.
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Affiliation(s)
- Kui Shen
- Department of Product Development, Precision Therapeutics, Inc, 2516 Jane Street, Pittsburgh, PA 15203, USA
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Anti-cancer drugs elicit re-expression of UDP-glucuronosyltransferases in melanoma cells. PLoS One 2012; 7:e47696. [PMID: 23110092 PMCID: PMC3478267 DOI: 10.1371/journal.pone.0047696] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Accepted: 09/17/2012] [Indexed: 11/19/2022] Open
Abstract
The UDP-glucuronosyltransferase (UGT) family of enzymes plays a vital role in the detoxification of carcinogens as well as clearance of anti-cancer drugs. In humans, 19 UGT family members have been identified and are expressed in a tissue specific manner throughout the body. However, the UGTs have not been previously characterized in melanocytes or melanoma. In the present study, UGT2B7, UGT2B10, and UGT2B15 were identified as being normally expressed in human melanocytes. The same three UGT family members were also expressed in the primary melanoma cell line WM115. No UGT expression was detected in another primary melanoma cell line, WM3211, or in any metastatic melanoma cell line examined. These results suggest that UGT expression is lost during melanoma progression. Treatment of WM3211 or metastatic melanoma cell lines with anti-cancer agents (including vemurafenib) induced expression of UGT2B7, UGT2B10 and UGT2B15 demonstrating that melanoma cells retain the ability to re-express these same three UGTs. The corresponding increase in glucuronidation activity in melanoma cells following anti-cancer treatment was also observed. Furthermore, knockdown of UGT2B7 in WM115 cells sensitized these cells to treatment by adriamycin and epirubicin indicating that UGT2B7 is involved in resistance to these drugs. However, knockdown of UGT2B7 had no effect on temozolomide toxicity. Taken together, these results clearly demonstrate a role for UGTs in melanoma etiology. Since the UGTs are drug metabolism enzymes, we propose that re-expression of the UGTs constitutes a previously unsuspected mechanism for intratumoral drug resistance in melanoma.
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Fumagalli D, Andre F, Piccart-Gebhart MJ, Sotiriou C, Desmedt C. Molecular biology in breast cancer: should molecular classifiers be assessed by conventional tools or by gene expression arrays? Crit Rev Oncol Hematol 2012; 84 Suppl 1:e58-69. [PMID: 22964299 DOI: 10.1016/j.critrevonc.2012.08.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2010] [Revised: 08/07/2012] [Accepted: 08/09/2012] [Indexed: 12/15/2022] Open
Abstract
Breast cancer is a complex disease, with heterogeneous presentations and clinical courses. Standard clinico-pathological parameters, relying on single gene or protein characterization determined with sometimes poorly-reproducible technologies, have shown limitations in the classification of the disease and in the prediction of individual patient outcomes and responses to therapy. Gene-expression profiling has revealed great potential to accurately classify breast cancer and define patient prognosis and prediction to anti-cancer therapy. Nevertheless, the performance of molecular classifiers remains sub-optimal, and both technical and conceptual improvements are needed. It is likely that determining the ideal strategy for tailoring treatment of breast cancer will require a more systematic, structured and multi-dimensional approach than in the past. Besides implementing cutting-edge technologies to detect genetic and epigenetic cancer alterations, the future of breast cancer research will in all probability rely on the innovative and multilevel integration of molecular profiles with clinical parameters of the disease and patient-related factors.
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Affiliation(s)
- Debora Fumagalli
- Breast Cancer Translational Research Unit, Jules Bordet Institute, Universite Libre de Bruxelles, Brussels, Belgium
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42
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How Kit A, Nielsen HM, Tost J. DNA methylation based biomarkers: practical considerations and applications. Biochimie 2012; 94:2314-37. [PMID: 22847185 DOI: 10.1016/j.biochi.2012.07.014] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 07/16/2012] [Indexed: 02/06/2023]
Abstract
A biomarker is a molecular target analyzed in a qualitative or quantitative manner to detect and diagnose the presence of a disease, to predict the outcome and the response to a specific treatment allowing personalized tailoring of patient management. Biomarkers can belong to different types of biochemical molecules such as proteins, DNA, RNA or lipids, whereby protein biomarkers have been the most extensively studied and used, notably in blood-based protein quantification tests or immunohistochemistry. The rise of interest in epigenetic mechanisms has allowed the identification of a new type of biomarker, DNA methylation, which is of great potential for many applications. This stable and heritable covalent modification mostly affects cytosines in the context of a CpG dinucleotide in humans. It can be detected and quantified by a number of technologies including genome-wide screening methods as well as locus- or gene-specific high-resolution analysis in different types of samples such as frozen tissues and FFPE samples, but also in body fluids such as urine, plasma, and serum obtained through non-invasive procedures. In some cases, DNA methylation based biomarkers have proven to be more specific and sensitive than commonly used protein biomarkers, which could clearly justify their use in clinics. However, very few of them are at the moment used in clinics and even less commercial tests are currently available. The objective of this review is to discuss the advantages of DNA methylation as a biomarker, the practical considerations for their development, and their use in disease detection, prediction of outcome or treatment response, through multiple examples mainly focusing on cancer, but also to evoke their potential for complex diseases and prenatal diagnostics.
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Affiliation(s)
- Alexandre How Kit
- Laboratory for Functional Genomics, Fondation Jean Dausset - CEPH, 27 rue Juliette Dodu, 75010 Paris, France
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43
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Ruban A, Berkutzki T, Cooper I, Mohar B, Teichberg VI. Blood glutamate scavengers prolong the survival of rats and mice with brain-implanted gliomas. Invest New Drugs 2012; 30:2226-2235. [PMID: 22297683 PMCID: PMC3484283 DOI: 10.1007/s10637-012-9794-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2011] [Accepted: 01/10/2012] [Indexed: 11/29/2022]
Abstract
L-Glutamate (Glu) plays a crucial role in the growth of malignant gliomas. We have established the feasibility of accelerating a naturally occurring brain to-blood Glu efflux by decreasing blood Glu levels with intravenous oxaloacetate, the respective Glu co-substrate of the blood resident enzyme humane glutamate-oxaloacetate transaminase (hGOT). We wished to demonstrate that blood Glu scavenging provides neuroprotection in the case of glioma. We now describe the neuroprotective effects of blood Glu scavenging in a fatal condition such as brain-implanted C6 glioma in rats and brain-implanted human U87 MG glioma in nude mice. Rat (C-6) or human (U87) glioma cells were grafted stereotactically in the brain of rats or mice. After development of tumors, the animals were drinking oxaloacetate with or without injections of hGOT. In addition, mice were treated with combination treatment, which included drinking oxaloacetate with intracutaneous injections of hGOT and intraperitoneal injection of Temozolomide. Animals drinking oxaloacetate with or without injections of hGOT displayed a smaller tumor volume, reduced invasiveness and prolonged survival than control animals drinking saline. These effects were significantly enhanced by Temozolomide in mice, which increased survival by 237%. This is the first demonstration of blood Glu scavenging in brain cancer, and because of its safety, is likely to be of clinical significance for the future treatment of human gliomas. As we demonstrated, the blood glutamate scavenging treatment in combination with TMZ could be a good candidate or as an alternative treatment to the patients that do not respond to TMZ.
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Affiliation(s)
- Angela Ruban
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, 76100, Israel,
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44
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Fumagalli C, Pruneri G, Possanzini P, Manzotti M, Barile M, Feroce I, Colleoni M, Bonanni B, Maisonneuve P, Radice P, Viale G, Barberis M. Methylation of O 6-methylguanine-DNA methyltransferase (MGMT) promoter gene in triple-negative breast cancer patients. Breast Cancer Res Treat 2012; 134:131-7. [DOI: 10.1007/s10549-011-1945-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Accepted: 12/26/2011] [Indexed: 12/12/2022]
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Somasundaram R, Villanueva J, Herlyn M. Intratumoral heterogeneity as a therapy resistance mechanism: role of melanoma subpopulations. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2012; 65:335-59. [PMID: 22959031 DOI: 10.1016/b978-0-12-397927-8.00011-7] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Malignant melanoma is an aggressive form of skin cancer whose incidence continues to increase worldwide. Increased exposure to sun, ultraviolet radiation, and the use of tanning beds can increase the risk of melanoma. Early detection of melanomas is the key to successful treatment mainly through surgical excision of the primary tumor lesion. But in advanced stage melanomas, once the disease has spread beyond the primary site to distant organs, the tumors are difficult to treat and quickly develop resistance to most available forms of therapy. The advent of molecular and cellular techniques has led to a better characterization of tumor cells revealing the presence of heterogeneous melanoma subpopulations. The discovery of gene mutations and alterations of cell-signaling pathways in melanomas has led to the development of new targeted drugs that show dramatic response rates in patients. Single-agent therapies generally target one subpopulation of tumor cells while leaving others unharmed. The surviving subpopulations will have the ability to repopulate the original tumors that can continue to progress. Thus, a rational approach to target multiple subpopulations of tumor cells with a combination of drugs instead of single-agent therapy will be necessary for long-lasting inhibition of melanoma lesions. In this context, the recent development of immune checkpoint reagents provides an additional armor that can be used in combination with targeted drugs to expand the presence of melanoma reactive T cells in circulation to prevent tumor recurrence.
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Affiliation(s)
- Rajasekharan Somasundaram
- Molecular and Cellular Oncogenesis Program, Melanoma Research Center, The Wistar Institute, Philadelphia, USA
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Mandrekar SJ, Sargent DJ. Design of clinical trials for biomarker research in oncology. CLINICAL INVESTIGATION 2011; 1:1629-1636. [PMID: 22389760 PMCID: PMC3290127 DOI: 10.4155/cli.11.152] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The developmental pathway from discovery to clinical practice for biomarkers and biomarker-directed therapies is complex. While several issues need careful consideration, two critical issues that surround the validation of biomarkers are the choice of clinical trial design (which is based on the strength of the preliminary evidence and marker prevalence) and the biomarker assay related issues surrounding the marker assessment methods such as the reliability and reproducibility of the assay. This review focuses on trial designs for marker validation, both in the setting of early phase trials for initial validation, as well as in the context of larger definitive trials. Designs for biomarker validation are broadly classified as retrospective (i.e., using data from previously well-conducted, randomized, controlled trials) or prospective (enrichment, allcomers or adaptive). We believe that the systematic evaluation and implementation of these design strategies are essential to accelerate the clinical validation of biomarker-guided therapy, thereby taking us a step closer to the goal of personalized medicine.
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Affiliation(s)
- Sumithra J Mandrekar
- Division of Biomedical Statistics & Informatics, Mayo Clinic, Rochester, MN 55905, USA
| | - Daniel J Sargent
- Division of Biomedical Statistics & Informatics, Mayo Clinic, Rochester, MN 55905, USA
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Sun S, Wong TS, Zhang XQ, Pu JKS, Lee NP, Day PJR, Ng GKB, Lui WM, Leung GKK. Protein alterations associated with temozolomide resistance in subclones of human glioblastoma cell lines. J Neurooncol 2011; 107:89-100. [PMID: 21979894 PMCID: PMC3273683 DOI: 10.1007/s11060-011-0729-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2011] [Accepted: 09/19/2011] [Indexed: 12/21/2022]
Abstract
Temozolomide (TMZ) is the standard chemotherapeutic agent for human malignant glioma, but intrinsic or acquired chemoresistance represents a major obstacle to successful treatment of this highly lethal group of tumours. Obtaining better understanding of the molecular mechanisms underlying TMZ resistance in malignant glioma is important for the development of better treatment strategies. We have successfully established a passage control line (D54-C10) and resistant variants (D54-P5 and D54-P10) from the parental TMZ-sensitive malignant glioma cell line D54-C0. The resistant sub-cell lines showed alterations in cell morphology, enhanced cell adhesion, increased migration capacities, and cell cycle arrests. Proteomic analysis identified a set of proteins that showed gradual changes in expression according to their 50% inhibitory concentration (IC50). Successful validation was provided by transcript profiling in another malignant glioma cell line U87-MG and its resistant counterparts. Moreover, three of the identified proteins (vimentin, cathepsin D and prolyl 4-hydroxylase, beta polypeptide) were confirmed to be upregulated in high-grade glioma. Our data suggest that acquired TMZ resistance in human malignant glioma is associated with promotion of malignant phenotypes, and our reported molecular candidates may serve not only as markers of chemoresistance but also as potential therapeutic targets in the treatment of TMZ-resistant human malignant glioma, providing a platform for future investigations.
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Affiliation(s)
- Stella Sun
- Division of Neurosurgery, Department of Surgery, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Queen Mary Hospital, 21 Sassoon Road, Pokfulam, Hong Kong, People's Republic of China
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McCormack AI, Wass JAH, Grossman AB. Aggressive pituitary tumours: the role of temozolomide and the assessment of MGMT status. Eur J Clin Invest 2011; 41:1133-48. [PMID: 21496012 DOI: 10.1111/j.1365-2362.2011.02520.x] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Aggressive pituitary tumours are associated with substantial morbidity and mortality. Treatment options are often limited, and chemotherapy has been reserved as salvage therapy although historically results have often been disappointing. However, temozolomide, an oral alkylating agent, has recently demonstrated significant activity against these tumours. A DNA repair protein, 06-methylguanine-DNA methyltransferase (MGMT) has been suggested as a biomarker to predict response to temozolomide in pituitary tumours. MATERIALS AND METHODS This paper will review the current literature on temozolomide and pituitary tumours and discuss the recent controversy surrounding the value of determining the MGMT status in this tumour group. A PubMed search was performed to retrieve articles, using the terms 'pituitary tumour' and 'temozolomide'. RESULTS Overall, 24/40 (60%) of the published cases demonstrated a response to temozolomide therapy. The highest response rates were seen amongst prolactinomas (73%) and ACTH-secreting tumours (60%), whilst nonfunctioning pituitary tumours exhibit lower response rates (40%). Responsivity is typically evident in the first 3 months of therapy and may be dramatic and sustained. Low MGMT expression, as determined by immunohistochemistry, is associated with a high response rate (76%), whilst high MGMT expression has not been associated with responses. MGMT promoter methylation does not correlate with temozolomide response. CONCLUSIONS Temozolomide is the first chemotherapeutic agent to show substantial response rates in aggressive pituitary tumours. MGMT immunohistochemistry, but not MGMT methylation analysis, shows promise as a predictive tool. Prospective clinical trials are now necessary to more accurately determine the efficacy of this agent in this patient group.
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Affiliation(s)
- Ann I McCormack
- Cancer Genetics Unit, Hormones and Cancer Group, Kolling Institute of Medical Research, Royal North Shore Hospital, Sydney, NSW, Australia
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Rother J, Jones D. Molecular markers of tumor progression in melanoma. Curr Genomics 2011; 10:231-9. [PMID: 19949544 PMCID: PMC2709934 DOI: 10.2174/138920209788488526] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2009] [Revised: 03/28/2009] [Accepted: 03/29/2009] [Indexed: 01/05/2023] Open
Abstract
Malignant melanoma represents one of the most aggressive malignancies but outcome is highly variable with early tumor lesions having an excellent prognosis following resection. We review here the data on identification of genes involved in the progression of melanoma as a result of expression array studies, genomic profiling, and genetic models. We focus on the role of tumor suppressors involved in cell cycle function, DNA repair, and genome maintenance. Highlighted are the roles of loss of p16 in promoting neoplasia in cooperation with deregulated MAPK signaling, and the role of loss of the RASSF1A protein in promoting chromosomal instability. The interactions between point mutation in growth signaling molecules and epigenetic changes in genes involved in DNA repair and cell division are discussed.
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Affiliation(s)
- Joshua Rother
- Division of Pathology and Laboratory Medicine, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
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Abstract
For in-transit melanoma confined to the extremities, regional chemotherapy in the form of hyperthermic isolated limb perfusion and isolated limb infusion are effective treatment modalities carrying superior response rates to current standard systemic therapy. Despite high response rates, most patients will eventually recur, supporting the role for novel research aimed at improving durable responses and minimizing toxicity. Although the standard cytotoxic agent for regional chemotherapy is melphalan, alternative agents such as temozolomide are currently being tested, with promising preliminary results. Current strategies for improving chemosensitivity to regional chemotherapy are aimed at overcoming classic resistance mechanisms such as drug metabolism and DNA repair, increasing drug delivery, inhibiting tumor-specific angiogenesis, and decreasing the apoptotic threshold of melanoma cells. Concurrent with development and testing of these agents, genomic profiling and biomolecular analysis of acquired tumor tissue may define patterns of tumor resistance and sensitivity from which personalized treatment may be tailored to optimize efficacy. In this article rational strategies for treatment of in-transit melanoma are outlined, with special emphasis on current translational and clinical research efforts.
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