The development of radio-resistant tumor cells might be overcome by the use of tumor selective cytotoxic agents in combination with radiation treatment of cancer. Thus, we are exploring the radiomodifying potential of D7, a tumor-inhibitory compound derived from a plant product, diospyrin, in breast carcinoma cells, MCF-7. The present study indicated that D7 could enhance the radiation-induced cytotoxicity and apoptosis through down-regulation of the anti-apoptotic Bcl-2 and COX-2 gene expression, and up-regulation of pro-apoptotic genes, like p53 and p21. The higher expression of PUMA, a pro-apoptotic protein was also observed in the combination treatment. Effect of D7 on up-regulation of p21 expression in irradiated MCF-7 cells was concomitant with the cell cycle arrest in the G1 phase. Thus, it was concluded that D7 could sensitize the effect of radiation in breast carcinoma by regulating the gene expression involved in cell cycle and apoptosis.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s11010-007-9511-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Patient perspective: Is intensive screening of women at high risk of breast cancer evidence-based medicine or ?
Womens Health (Lond)
January 2025
Department of Pharmacy Practice, Midwestern University College of Pharmacy, Glendale Campus, Glendale, AZ, USA.
In 2023, a breast cancer risk assessment and a subsequent positive test for the BRCA-2 genetic mutation brought me to the uncomfortable intersection of a longstanding career as an advocate for high-quality medical evidence to support shared patient-provider decision making and a new role as a high-risk patient. My search for studies of available risk-management options revealed that the most commonly recommended approach for women with a ⩾20% lifetime breast cancer risk, intensive screening including annual mammography and/or magnetic resonance imaging beginning at age 25-40 years, was supported only by cancer-detection statistics, with almost no evidence on patient-centered outcomes-mortality, physical and psychological morbidity, or quality of life-compared with standard screening or a surgical alternative, bilateral risk-reducing mastectomy. In this commentary, I explore parallels between the use of the intensive screening protocol and another longstanding women's health recommendation based on limited evidence, the use of hormone therapy (HT) for postmenopausal chronic disease prevention, which was sharply curtailed after the publication of the groundbreaking Women's Health Initiative trial in 2002.
View Article and Find Full Text PDFBreast Cancer Patients' Experiences of Coping With Financial Toxicity: A Systematic Review and Qualitative Meta-Synthesis.
Psychooncology
January 2025
The Department of Breast Medicine, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University/Hunan Cancer Hospital, Changsha, China.
Objective: Breast cancer patients often face a significant financial burden, leading to financial toxicity due to the necessity for long-term care, costly treatment, and follow-up measures. The purpose of this study is to systematically review the available qualitative evidence on how breast cancer patients cope with financial toxicity and their unmet need to promote the implementation of effective intervention strategies.
Methods: PubMed, Web of Science, PsycINFO, CINAHL, EMBASE, Scopus, CNKI, Wan Fang Data, and VIP databases were systematically searched for literature related to the study topic.
Tinagl1 restores tamoxifen sensitivity and blocks fibronectin-induced EMT by simultaneously blocking the EGFR and β1-integrin/FAK signaling pathways in tamoxifen-resistant breast cancer cells.
IUBMB Life
January 2025
Department of General Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing, China.
Tamoxifen (TAM) is employed to treat premenopausal ER-positive breast cancer patients, but TAM resistance is the main reason affecting its efficacy. Thus, addressing TAM resistance is crucial for improving therapeutic outcomes. This study explored the potential role of Tinagl1, a secreted extracellular matrix protein, whose expression is compromised in TAM-resistant MCF-7 breast cancer cells (MCF-7R).
View Article and Find Full Text PDFUltrasound-activated erythrocyte membrane-camouflaged Pt (II) layered double hydroxide enhances PD-1 inhibitor efficacy in triple-negative breast cancer through cGAS-STING pathway-mediated immunogenic cell death.
Theranostics
January 2025
Cancer Research Center, School of Medicine, Xiamen University, Xiamen, 361102, China.
Immunogenic cell death (ICD) offers a promising avenue for the treatment of triple-negative breast cancer (TNBC). However, optimizing immune responses remains a formidable challenge. This study presents the design of RBCm@Pt-CoNi layered double hydroxide (RmPLH), an innovative sonosensitizer for sonodynamic therapy (SDT), aimed at enhancing the efficacy of programmed cell death protein 1 (PD-1) inhibitors by inducing robust ICD responses.
View Article and Find Full Text PDFCancer-targeted pro-theranostic bi-metallic organo-coordination nanoparticles.
Theranostics
January 2025
Departments of Radiology, Washington University in St. Louis, MO 63110, USA.
Cancer remains a leading cause of mortality, with aggressive, treatment-resistant tumors posing significant challenges. Current combination therapies and imaging approaches often fail due to disparate pharmacokinetics and difficulties correlating drug delivery with therapeutic response. In this study, we developed radionuclide-activatable theranostic nanoparticles (NPs) comprising folate receptor-targeted bimetallic organo-nanoparticles (Gd-Ti-FA-TA NPs).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!