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Tao W, Wang S, Xu A, Xue Y, Wang H, Xu H. 18F-FDG Micro PET/CT imaging to evaluate the effect of BRCA1 knockdown on MDA-MB231 breast cancer cell radiosensitivity. Transl Oncol 2022; 25:101517. [PMID: 35985202 PMCID: PMC9411683 DOI: 10.1016/j.tranon.2022.101517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/29/2022] [Accepted: 08/09/2022] [Indexed: 12/04/2022] Open
Abstract
BRCA1 gene knockdown improves the radiosensitivity of breast cancer cells. BRCA1 gene knockdown combination with radiotherapy downregulates multiple biomarkers of poor prognosis. 18F-FDG Micro PET/CT imaging was able to evaluate the radiosensitizing effect of the BRCA1 gene in vitro experiment.
Objective Radioresistance of tumor cells is a major factor associated with failure of radiotherapy (RT). This study aimed to investigate the effect of BRCA1 knockdown on MDA-MB231 breast cancer cell radiosensitivity. Materials and methods Short hairpin RNA (shRNA) was used to knockdown BRCA1 gene in MDA-MB231 cells. Cell viability and proliferative capacity were assessed by CCK-8 and colony formation assays, respectively. We established xenograft models in nude mice to evaluate tumor volume and tumor weight. The mice were imaged by 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) before and after RT to evaluate changes in maximum standardized uptake value (SUVmax) and tumor SUVmax/muscle SUVmax (TMR). Changes in HIF-1α, Glut-1 and Ki-67 were analyzed and the correlation between 18F-FDG uptake and tumor biology was analyzed. Results Compared with the control cells, RT significantly reduced cell viability and colony formation capacity in cells with the BRCA1 gene knockdown. In vivo assays showed that there was obvious delay in the tumor growth in the shBRCA1+RT group compared with the control group. 18F-FDG Micro PET/CT indicated a reduction in glucose metabolism in the shBRCA1+RT group, with statistically significant differences in both the SUVmax and TMR. The data showed the expression of HIF-1α, Glut-1 and Ki-67 was downregulated in the shBRCA1+RT group, and both SUVmax and TMR had significant correlation with tumor biology. Conclusion These results demonstrated that BRCA1 knockdown improves the sensitivity of MDA-MB231 breast cancer cells to RT. In addition, 18F-FDG PET/CT imaging allows non-invasive analysis of tumor biology and assessment of radiosensitivity.
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Affiliation(s)
- Weitao Tao
- School of Basic Medical Sciences, Anhui Medical University, No. 81 Meishan Road, Hefei 230032, China
| | - Siqi Wang
- Department of Nuclear Medicine, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei 230022, China
| | - Alei Xu
- Department of Nuclear Medicine, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei 230022, China
| | - Yangyang Xue
- Department of Nuclear Medicine, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei 230022, China
| | - Hui Wang
- Department of Nuclear Medicine, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei 230022, China
| | - Huiqin Xu
- School of Basic Medical Sciences, Anhui Medical University, No. 81 Meishan Road, Hefei 230032, China; Department of Nuclear Medicine, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei 230022, China.
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Roviello G, Catalano M, Santi R, Santoni M, Galli IC, Amorosi A, Polom W, De Giorgi U, Nesi G. Neoadjuvant Treatment in Muscle-Invasive Bladder Cancer: From the Beginning to the Latest Developments. Front Oncol 2022; 12:912699. [PMID: 35936721 PMCID: PMC9353067 DOI: 10.3389/fonc.2022.912699] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 06/22/2022] [Indexed: 11/17/2022] Open
Abstract
Urothelial carcinoma of the bladder is one of the most prevalent cancers worldwide, diagnosed as muscle invasive in 25% of cases. Although several studies have demonstrated an overall 5% absolute survival benefit at 5 years with cisplatin-based combination neoadjuvant treatment, administration of chemotherapy prior to radical cystectomy (RC) in muscle-invasive bladder cancer (MIBC) patients is still a matter of debate. This may be due to the perceived modest survival benefit, cisplatin-based chemotherapy ineligibility, or fear of delaying potentially curative surgery in non-responders. However, immunotherapy and novel targeted therapies have shown to prolong survival in advanced disease and are under investigation in the neoadjuvant and adjuvant settings to reduce systemic relapse and improve cure rates. Genomic characterization of MIBC could help select the most effective chemotherapeutic regimen for the individual patient. Large cohort studies on neoadjuvant treatments with immune checkpoint inhibitors (ICIs) and molecular therapies, alone or combined with chemotherapy, are ongoing. In this review, we trace the development of neoadjuvant therapy in MIBC and explore recent advances that may soon change clinical practice.
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Affiliation(s)
| | - Martina Catalano
- School of Human Health Sciences, University of Florence, Florence, Italy
| | - Raffaella Santi
- Department of Health Sciences, University of Florence, Florence, Italy
| | | | - Ilaria Camilla Galli
- Histopathology and Molecular Diagnostics, Careggi Teaching Hospital, Florence, Italy
| | - Andrea Amorosi
- Department of Health Sciences, University of Catanzaro, Catanzaro, Italy
| | - Wojciech Polom
- Department of Urology, Faculty of Medicine, Medical University of Gdansk, Gdansk, Poland
| | - Ugo De Giorgi
- Department of Medical Oncology, IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) Dino Amadori, Meldola, Italy
| | - Gabriella Nesi
- Department of Health Sciences, University of Florence, Florence, Italy
- *Correspondence: Gabriella Nesi,
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Wang L, Wang Q, Xu Y, Cui M, Han L. Advances in the Treatment of Ovarian Cancer Using PARP Inhibitors and the Underlying Mechanism of Resistance. Curr Drug Targets 2021; 21:167-178. [PMID: 31553293 DOI: 10.2174/1389450120666190925123507] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 08/27/2019] [Accepted: 09/02/2019] [Indexed: 12/15/2022]
Abstract
The standard treatment for advanced ovarian cancer is cytoreductive surgery followed by cytotoxic chemotherapy. However, it has high risk of recurrence and poor prognosis. Poly(ADPribose) polymerase (PARP) inhibitors selectively target DNA double-strand breaks (DSBs) in tumor cells that cannot be repaired and induce the synthetic lethality of BRCA1/2 mutation cancers. PARP inhibitors are clinically used to treat recurrent ovarian cancer and show significant efficacy in ovarian cancer patients with homologous recombination repair (HRR) pathway defects. PARP inhibitors also have significant clinical benefits in patients without HR defects. With the increasingly extensive clinical application of PARP inhibitors, the possibility of acquiring drug resistance is high. Therefore, clinical strategies should be adopted to manage drug resistance of PARP inhibitors. This study aims to summarize the indications and toxicity of PARP inhibitors, the mechanism of action, targeted treatment of drug resistance, and potential methods to manage drug-resistant diseases. We used the term "ovarian cancer" and the names of each PARP inhibitor as keywords to search articles published in the Medical Subject Headings (MeSH) on Pubmed, along with the keywords "clinicaltrials.gov" and "google.com/patents" as well as "uspto.gov." The FDA has approved olaparib, niraparib, and rucaparib for the treatment of recurrent epithelial ovarian cancer (EOC). Talazoparib and veliparib are currently in early trials and show promising clinical results. The mechanism underlying resistance to PARP inhibitors and the clinical strategies to overcome them remain unclear. Understanding the mechanism of resistance to PARP inhibitors and their relationship with platinum resistance may help with the development of antiresistance therapies and optimization of the sequence of drug application in the future clinical treatment of ovarian cancer.
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Affiliation(s)
- Ling Wang
- Department of Obstetrics and Gynecology, The Second Hospital of Jilin University, Changchun, China
| | - Qi Wang
- Department of Obstetrics and Gynecology, The Second Hospital of Jilin University, Changchun, China
| | - Yangchun Xu
- Department of Dermatology, The Second Hospital of Jilin University, Changchun, China
| | - Manhua Cui
- Department of Obstetrics and Gynecology, The Second Hospital of Jilin University, Changchun, China
| | - Liying Han
- Department of Obstetrics and Gynecology, The Second Hospital of Jilin University, Changchun, China
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Pardo JC, Ruiz de Porras V, Plaja A, Carrato C, Etxaniz O, Buisan O, Font A. Moving towards Personalized Medicine in Muscle-Invasive Bladder Cancer: Where Are We Now and Where Are We Going? Int J Mol Sci 2020; 21:ijms21176271. [PMID: 32872531 PMCID: PMC7503307 DOI: 10.3390/ijms21176271] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/27/2020] [Accepted: 08/28/2020] [Indexed: 01/09/2023] Open
Abstract
Neoadjuvant cisplatin-based chemotherapy followed by radical cystectomy is the recommended treatment, with the highest level of evidence, for patients with muscle-invasive bladder cancer (MIBC). However, only a minority of patients receive this treatment, mainly due to patient comorbidities, the relatively small survival benefit, and the lack of predictive biomarkers to select those patients most likely to benefit from this multimodal approach. In addition, adjuvant chemotherapy has been recommended for patients with high-risk MIBC, although randomized trials have not provided conclusive evidence on the impact of this approach. At present, however, this situation is changing, largely due to our improved knowledge of the molecular biology of bladder cancer, which has enabled us to identify new prognostic and predictive biomarkers that can be used to select the most appropriate treatment for each patient. Moreover, new active treatments, especially immunotherapy, have shown promising results in the neoadjuvant setting. In addition, the gene expression profile of bladder tumors can be used to classify them into different subtypes, which correlate with specific clinical-pathological characteristics and with treatment response or resistance. Therefore, the main objective for the near future is to introduce these translational breakthroughs into routine clinical practice in order to personalize treatment for each patient.
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Affiliation(s)
- Juan Carlos Pardo
- Department of Medical Oncology, Catalan Institute of Oncology, University Hospital Germans Trias i Pujol, Ctra. Can Ruti-Camí de les Escoles s/n, 08916 Badalona, Spain; (J.C.P.); (A.P.); (O.E.)
- Catalan Institute of Oncology, Badalona Applied Research Group in Oncology (B·ARGO), Ctra. Can Ruti-Camí de les Escoles s/n, 08916 Badalona, Spain;
| | - Vicenç Ruiz de Porras
- Catalan Institute of Oncology, Badalona Applied Research Group in Oncology (B·ARGO), Ctra. Can Ruti-Camí de les Escoles s/n, 08916 Badalona, Spain;
- Germans Trias i Pujol Research Institute (IGTP), Ctra. Can Ruti-Camí de les Escoles s/n, 08916 Badalona, Spain
| | - Andrea Plaja
- Department of Medical Oncology, Catalan Institute of Oncology, University Hospital Germans Trias i Pujol, Ctra. Can Ruti-Camí de les Escoles s/n, 08916 Badalona, Spain; (J.C.P.); (A.P.); (O.E.)
- Catalan Institute of Oncology, Badalona Applied Research Group in Oncology (B·ARGO), Ctra. Can Ruti-Camí de les Escoles s/n, 08916 Badalona, Spain;
| | - Cristina Carrato
- Pathology Department, Hospital Germans Trias i Pujol, 08916 Badalona, Spain;
| | - Olatz Etxaniz
- Department of Medical Oncology, Catalan Institute of Oncology, University Hospital Germans Trias i Pujol, Ctra. Can Ruti-Camí de les Escoles s/n, 08916 Badalona, Spain; (J.C.P.); (A.P.); (O.E.)
- Catalan Institute of Oncology, Badalona Applied Research Group in Oncology (B·ARGO), Ctra. Can Ruti-Camí de les Escoles s/n, 08916 Badalona, Spain;
| | - Oscar Buisan
- Urology Department, University Hospital Germans Trias i Pujol, 08916 Badalona, Spain;
| | - Albert Font
- Department of Medical Oncology, Catalan Institute of Oncology, University Hospital Germans Trias i Pujol, Ctra. Can Ruti-Camí de les Escoles s/n, 08916 Badalona, Spain; (J.C.P.); (A.P.); (O.E.)
- Catalan Institute of Oncology, Badalona Applied Research Group in Oncology (B·ARGO), Ctra. Can Ruti-Camí de les Escoles s/n, 08916 Badalona, Spain;
- Correspondence: ; Tel.: +34-93-497-8925; Fax: +34-93-497-8950
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Outstanding female cancer research paper awards of the 2018 Hsu Chien-Tien Cancer Foundation. Taiwan J Obstet Gynecol 2019. [DOI: 10.1016/j.tjog.2019.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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