1
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Shahiwala AF, Khan GA. Potential Phytochemicals for Prevention of Familial Breast Cancer with BRCA Mutations. Curr Drug Targets 2023; 24:521-531. [PMID: 36918779 DOI: 10.2174/1389450124666230314110800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 10/17/2022] [Accepted: 01/12/2023] [Indexed: 03/16/2023]
Abstract
Breast cancer has remained a global challenge and the second leading cause of cancer mortality in women and family history. Hereditary factors are some of the major risk factors associated with breast cancer. Out of total breast cancer cases, 5-10% account only for familial breast cancer, and nearly 50% of all hereditary breast cancer are due to BRCA1/BRCA2 germline mutations. BRCA1/2 mutations play an important role not only in determining the clinical prognosis of breast cancer but also in the survival curves. Since this risk factor is known, a significant amount of the healthcare burden can be reduced by taking preventive measures among people with a known history of familial breast cancer. There is increasing evidence that phytochemicals of nutrients and supplements help in the prevention and cure of BRCA-related cancers by different mechanisms such as limiting DNA damage, altering estrogen metabolism, or upregulating expression of the normal BRCA allele, and ultimately enhancing DNA repair. This manuscript reviews different approaches used to identify potential phytochemicals to mitigate the risk of familial breast cancer with BRCA mutations. The findings of this review can be extended for the prevention and cure of any BRCAmutated cancer after proper experimental and clinical validation of the data.
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Affiliation(s)
| | - Gazala Afreen Khan
- Department of Clinical Pharmacy & Pharmacotherapeutics, Dubai Pharmacy College for Girls, Dubai, United Arab Emirates
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2
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Frederick ALM, Guo C, Meyer A, Yan L, Schneider SS, Liu Z. The influence of obesity on folate status, DNA methylation and cancer-related gene expression in normal breast tissues from premenopausal women. Epigenetics 2020; 16:458-467. [PMID: 32749195 DOI: 10.1080/15592294.2020.1805687] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Epidemiological studies have established obesity as a critical risk factor for postmenopausal breast cancer (post-BC), whereas a reverse association holds prior to menopause. A significant scientific gap exists in understanding the mechanism(s) underpinning this epidemiological phenomenon, particularly the reverse association between obesity and premenopausal breast cancer (pre-BC). This study aimed to understand how folate metabolism and DNA methylation inform the association between obesity and pre-BC. Fifty normal breast tissue samples were collected from premenopausal women who underwent reduction mammoplasty. We modified the Lactobacillus Casei microbiological folate assay and measured folate levels in our breast tissue samples. The DNA methylation of LINE-1, a biomarker of genome-wide methylation, and the expression of a panel of breast cancer-related genes was measured by pyrosequencing and real-time PCR. We found that a high BMI is associated with an increase of folate levels in mammary tissue, with an increase of 2.65 ng/g of folate per every 5-unit increase of BMI (p < 0.05). LINE-1 DNA methylation was significantly associated with BMI (p < 0.05), and marginally associated with folate concentration (p = 0.087). A high expression of SFRP1 was observed in subjects with high BMI or high folate status (p < 0.05). This study demonstrated that, in premenopausal women, obesity is associated with increased mammary folate status, genome-wide DNA methylation and SFRP1 gene expression. Our findings indicated that the improved folate and epigenetic status represents a novel mechanism responsible for the reverse association between obesity and pre-BC.
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Affiliation(s)
- Armina-Lyn M Frederick
- Department of Nutrition, School of Public Health and Health Sciences, University of Massachusetts, Amherst, MA, USA.,Program in Experimental & Molecular Medicine, Geisel School of Medicine, Dartmouth College, Hanover, NH, USA
| | - Chi Guo
- Department of Nutrition, School of Public Health and Health Sciences, University of Massachusetts, Amherst, MA, USA.,Department of Molecular Medicine, Hunan University, Changsha, Hunan, China
| | - Ann Meyer
- Division of Pyrosequencing, EpigenDx, Hopkinton, MA, USA
| | - Liying Yan
- Division of Pyrosequencing, EpigenDx, Hopkinton, MA, USA
| | - Sallie S Schneider
- Pioneer Valley Life Sciences Institute, Baystate Medical Center, Springfield, MA, USA
| | - Zhenhua Liu
- Department of Nutrition, School of Public Health and Health Sciences, University of Massachusetts, Amherst, MA, USA.,Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA
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3
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Serum 'Vitamin-Mineral' Profiles: Associations with Postmenopausal Breast Cancer Risk Including Dietary Patterns and Supplementation. A Case-Control Study. Nutrients 2019; 11:nu11092244. [PMID: 31540424 PMCID: PMC6770708 DOI: 10.3390/nu11092244] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Revised: 09/15/2019] [Accepted: 09/16/2019] [Indexed: 12/13/2022] Open
Abstract
Breast cancer is the most prevalent cancer in females worldwide. Studies evaluating the blood vitamins and minerals status in the breast cancer etiology are limited, and the results are inconclusive. This study analyzed the association between serum vitamin-mineral profiles (V-MPs) and breast cancer (BC) risk with including dietary patterns (DPs) and the use of supplements. This case-control study involved 420 women aged 40–79 years from north-eastern Poland, including 190 newly diagnosed breast cancer cases. The fasting serum concentrations of vitamins (folate, cobalamin, 25(OH) vitamin D) and minerals (iron, calcium, magnesium) were measured in 129 post-menopausal women, including 82 controls and 47 cases. Three V-MPs were derived with a Principal Component Analysis (PCA). A logistic regression analysis was performed to estimate the odds ratio (OR) and 95% confidence interval (95% CI) of the breast cancer risk associated with serum V-MPs and serum levels of single biomarkers. The risk of BC was lower by 88% (OR: 0.12; 95% Cl: 0.02–0.88; p < 0.05) in the upper tertile of the serum ‘Iron-Calcium’ profile compared to the bottom tertile, lower by 67% (OR: 0.33; 95% Cl: 0.11–0.97; p < 0.05) at the level of serum 25(OH) vitamin D ≥24.6 ng/mL and lower by 68% (OR: 0.32; 95% Cl: 0.11–0.91; p < 0.05) at the level of serum calcium ≥9.6 mg/dL. There was an inverse association of the serum ‘Magnesium’ profile or serum level of iron with the risk of BC, which disappeared after adjustment for the set of confounders accounted for: age, body mass index (BMI), socioeconomic status, overall physical activity, smoking status, age at menarche, number of full-term pregnancies, oral contraceptive use, hormone-replacement therapy use, family history of breast cancer, vitamin/mineral supplement use, the molecular subtype of breast cancer, and dietary patterns. No significant association was found between BC risk and the serum ‘Folate-Cobalamin-Vitamin D’ profile or serum folate, cobalamin or magnesium considered separately. These findings highlight that a higher-normal serum level of both iron and calcium, considered together as the serum profile, as well as a higher-normal serum level of calcium, considered separately, and a slightly below the normal range of serum vitamin D level may protect against breast cancer among postmenopausal women, independent of dietary patterns or the use of vitamin/mineral supplements. Therefore, the maintenance of the adequate status of vitamins and minerals and the regular monitoring of their blood markers should be included in breast cancer prevention.
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4
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Houghton SC, Eliassen AH, Zhang SM, Selhub J, Rosner BA, Willett WC, Hankinson SE. Plasma B-vitamin and one-carbon metabolites and risk of breast cancer before and after folic acid fortification in the United States. Int J Cancer 2019; 144:1929-1940. [PMID: 30346061 DOI: 10.1002/ijc.31934] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 09/26/2018] [Indexed: 01/01/2023]
Abstract
Prior epidemiologic findings for plasma folate and B-vitamins and breast cancer risk are inconsistent and have not assessed the influence of folic acid fortification. Therefore, we examined the associations of plasma folate, B12 , pyridoxal 5'-phosphate (PLP), homocysteine, cysteine and cysteinylglycine with breast cancer risk, before and after fortification. We conducted a nested case-control study within the prospective Nurses' Health Study. In 1989-1990 (pre-fortification), 32,826 women donated a blood sample and 18,743 donated an additional blood sample in 2000-2001 (post-fortification). Between the first blood collection and 2006, 1874 incident breast cancer cases with at least one blood sample and 367 with two were 1:1 matched to controls. Conditional logistic regression was used to estimate relative risks (RR) and 95% confidence intervals (CI) adjusting for breast cancer risk factors. Overall, higher plasma folate, B12 , PLP, homocysteine, cysteine and cysteinylglycine levels were not associated with breast cancer risk. Associations did not vary by in situ/invasive, hormone receptor status, or tumor molecular subtype. Additionally, associations were null before and after fortification. For example, the RR (95% CI) for the highest versus lowest tertile of 1990 (pre-fortification) plasma folate with 1990-2000 follow-up was 0.93 (0.75-1.16) and for the 2000 plasma folate (post-fortification) with 2000-2006 follow-up the RR (95% CI) was 1.17 (0.79-1.74). Plasma folate, B12 , PLP, homocysteine, cysteine and cysteinylglycine were not significantly associated with breast cancer overall, before and after fortification, or with specific tumor molecular subtypes. However, long term associations (>8 years) after the implementation of fortification could not be examined.
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Affiliation(s)
- Serena C Houghton
- Department of Biostatistics and Epidemiology, University of Massachusetts, Amherst, MA
| | - A Heather Eliassen
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA
| | - Shumin M Zhang
- Division of Preventive Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
| | - Jacob Selhub
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, MA
| | - Bernard A Rosner
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA.,Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA
| | - Walter C Willett
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA.,Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA.,Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA
| | - Susan E Hankinson
- Department of Biostatistics and Epidemiology, University of Massachusetts, Amherst, MA.,Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA
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5
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Folic acid supplement use and breast cancer risk in BRCA1 and BRCA2 mutation carriers: a case–control study. Breast Cancer Res Treat 2019; 174:741-748. [DOI: 10.1007/s10549-018-05118-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 12/21/2018] [Indexed: 10/27/2022]
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6
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Ma JL, Zhang T, Suo FZ, Chang J, Wan XB, Feng XJ, Zheng YC, Liu HM. Lysine-specific demethylase 1 activation by vitamin B2 attenuates efficacy of apatinib for proliferation and migration of gastric cancer cell MGC-803. J Cell Biochem 2018; 119:4957-4966. [PMID: 29384217 DOI: 10.1002/jcb.26741] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 01/25/2018] [Indexed: 12/29/2022]
Abstract
B vitamins play an essential role in the biosynthesis of nucleotides, replication of DNA, supply of methyl-groups, growth and repair of cells, aberrancies of which have all been implicated in carcinogenesis. Although the potential role of vitamin B in relation to the risk of cancer, including breast, and colorectal cancer, has been investigated in several observational studies, the mechanism of action is still unclear. In this study, vitamin B2 exhibited efficient activation of LSD1 by occupying the active sites where FAD stands. Interestingly, vitamin B2 significantly downregulated expression of CD86, a sensitive surrogate biomarker of LSD1 inhibition, and showed marked activation of gastric cancer cell migration and invasion. Meanwhile, vitamin B2 induced activation of LSD1 may attenuate the proliferation inhibition, and anti-migration effects of apatinib in gastric cancer cells. These findings suggested that vitamin B supplementation may interfere with the efficacy of apatinib in patients with gastric cancer.
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Affiliation(s)
- Jin-Lian Ma
- Key Laboratory of Advanced Pharmaceutical Technology, Ministry of Education of China, Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Institute of Drug Discovery and Development, Zhengzhou University, Zhengzhou, Henan, China
| | - Ting Zhang
- Key Laboratory of Advanced Pharmaceutical Technology, Ministry of Education of China, Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Institute of Drug Discovery and Development, Zhengzhou University, Zhengzhou, Henan, China
| | - Feng-Zhi Suo
- Key Laboratory of Advanced Pharmaceutical Technology, Ministry of Education of China, Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Institute of Drug Discovery and Development, Zhengzhou University, Zhengzhou, Henan, China
| | - Jiao Chang
- Key Laboratory of Advanced Pharmaceutical Technology, Ministry of Education of China, Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Institute of Drug Discovery and Development, Zhengzhou University, Zhengzhou, Henan, China
| | - Xiang-Bin Wan
- Henan Cancer Hospital, Zhengzhou University, Zhengzhou, Henan, China
| | - Xue-Jian Feng
- Key Laboratory of Advanced Pharmaceutical Technology, Ministry of Education of China, Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Institute of Drug Discovery and Development, Zhengzhou University, Zhengzhou, Henan, China
| | - Yi-Chao Zheng
- Key Laboratory of Advanced Pharmaceutical Technology, Ministry of Education of China, Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Institute of Drug Discovery and Development, Zhengzhou University, Zhengzhou, Henan, China.,National Center for International Research of Micro-nano Molding Technology & Key Laboratory for Micro Molding Technology of Henan Province, Zhengzhou University, Zhengzhou, Henan, China
| | - Hong-Min Liu
- Key Laboratory of Advanced Pharmaceutical Technology, Ministry of Education of China, Co-innovation Center of Henan Province for New Drug R & D and Preclinical Safety, Institute of Drug Discovery and Development, Zhengzhou University, Zhengzhou, Henan, China
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7
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Cuyàs E, Fernández-Arroyo S, Alarcón T, Lupu R, Joven J, Menendez JA. Germline BRCA1 mutation reprograms breast epithelial cell metabolism towards mitochondrial-dependent biosynthesis: evidence for metformin-based "starvation" strategies in BRCA1 carriers. Oncotarget 2018; 7:52974-52992. [PMID: 27259235 PMCID: PMC5288162 DOI: 10.18632/oncotarget.9732] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 05/12/2016] [Indexed: 12/17/2022] Open
Abstract
We hypothesized that women inheriting one germline mutation of the BRCA1 gene (“one-hit”) undergo cell-type-specific metabolic reprogramming that supports the high biosynthetic requirements of breast epithelial cells to progress to a fully malignant phenotype. Targeted metabolomic analysis was performed in isogenic pairs of nontumorigenic human breast epithelial cells in which the knock-in of 185delAG mutation in a single BRCA1 allele leads to genomic instability. Mutant BRCA1 one-hit epithelial cells displayed constitutively enhanced activation of biosynthetic nodes within mitochondria. This metabolic rewiring involved the increased incorporation of glutamine- and glucose-dependent carbon into tricarboxylic acid (TCA) cycle metabolite pools to ultimately generate elevated levels of acetyl-CoA and malonyl-CoA, the major building blocks for lipid biosynthesis. The significant increase of branched-chain amino acids (BCAAs) including the anabolic trigger leucine, which can not only promote protein translation via mTOR but also feed into the TCA cycle via succinyl-CoA, further underscored the anabolic reprogramming of BRCA1 haploinsufficient cells. The anti-diabetic biguanide metformin “reversed” the metabolomic signature and anabolic phenotype of BRCA1 one-hit cells by shutting down mitochondria-driven generation of precursors for lipogenic pathways and reducing the BCAA pool for protein synthesis and TCA fueling. Metformin-induced restriction of mitochondrial biosynthetic capacity was sufficient to impair the tumor-initiating capacity of BRCA1 one-hit cells in mammosphere assays. Metabolic rewiring of the breast epithelium towards increased anabolism might constitute an unanticipated and inherited form of metabolic reprogramming linked to increased risk of oncogenesis in women bearing pathogenic germline BRCA1 mutations. The ability of metformin to constrain the production of mitochondrial-dependent biosynthetic intermediates might open a new avenue for “starvation” chemopreventive strategies in BRCA1 carriers.
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Affiliation(s)
- Elisabet Cuyàs
- ProCURE (Program Against Cancer Therapeutic Resistance), Metabolism and Cancer Group, Catalan Institute of Oncology, Girona, Catalonia, Spain.,Molecular Oncology Group, Girona Biomedical Research Institute (IDIBGI), Girona, Catalonia, Spain
| | - Salvador Fernández-Arroyo
- Unitat de Recerca Biomèdica, Hospital Universitari de Sant Joan, IISPV, Universitat Rovira i Virgili, Campus of International Excellence Southern Catalonia, Reus, Spain
| | - Tomás Alarcón
- Institució Catalana d'Estudis i Recerca Avançats (ICREA), Barcelona, Spain.,Computational and Mathematical Biology Research Group, Centre de Recerca Matemàtic (CRM), Barcelona, Spain.,Departament de Matemàtiques, Universitat Autònoma de Barcelona, Barcelona, Spain.,Barcelona Graduate School of Mathematics (BGSMath), Barcelona, Spain
| | - Ruth Lupu
- Mayo Clinic, Department of Laboratory Medicine and Pathology, Division of Experimental Pathology, Rochester, MN, USA.,Mayo Clinic Cancer Center, Rochester, MN, USA
| | - Jorge Joven
- Unitat de Recerca Biomèdica, Hospital Universitari de Sant Joan, IISPV, Universitat Rovira i Virgili, Campus of International Excellence Southern Catalonia, Reus, Spain
| | - Javier A Menendez
- ProCURE (Program Against Cancer Therapeutic Resistance), Metabolism and Cancer Group, Catalan Institute of Oncology, Girona, Catalonia, Spain.,Molecular Oncology Group, Girona Biomedical Research Institute (IDIBGI), Girona, Catalonia, Spain
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8
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Menendez JA, Folguera-Blasco N, Cuyàs E, Fernández-Arroyo S, Joven J, Alarcón T. Accelerated geroncogenesis in hereditary breast-ovarian cancer syndrome. Oncotarget 2017; 7:11959-71. [PMID: 26943589 PMCID: PMC4914261 DOI: 10.18632/oncotarget.7867] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 02/21/2016] [Indexed: 12/21/2022] Open
Abstract
The geroncogenesis hypothesis postulates that the decline in metabolic cellular health that occurs naturally with aging drives a "field effect" predisposing normal tissues for cancer development. We propose that mutations in the cancer susceptibility genes BRCA1/2 might trigger "accelerated geroncogenesis" in breast and ovarian epithelia. By speeding up the rate at which the metabolic threshold becomes "permissive" with survival and expansion of genomically unstable pre-tumoral epithelial cells, BRCA haploinsufficiency-driven metabolic reprogramming would operate as a bona fide oncogenic event enabling malignant transformation and tumor formation in BRCA carriers. The metabolic facet of BRCA1 one-hit might involve tissue-specific alterations in acetyl-CoA, α-ketoglutarate, NAD+, FAD, or S-adenosylmethionine, critical factors for de/methylation or de/acetylation dynamics in the nuclear epigenome. This in turn might induce faulty epigenetic reprogramming at the "install phase" that directs cell-specific differentiation of breast/ovarian epithelial cells, which can ultimately determine the penetrance of BRCA defects during developmental windows of susceptibility. This model offers a framework to study whether metabolic drugs that prevent or revert metabolic reprogramming induced by BRCA haploinsufficiency might displace the "geroncogenic risk" of BRCA carriers to the age typical for those without the mutation. The identification of the key nodes that directly communicate changes in cellular metabolism to the chromatin in BRCA haploinsufficient cells may allow the epigenetic targeting of genomic instability using exclusively metabolic means. The validation of accelerated geroncogenesis as an inherited "one-hit" metabolic "field effect" might offer new strategies to therapeutically revisit the apparently irreversible genetic-hereditary fate of women with hereditary breast-ovarian cancer syndrome.
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Affiliation(s)
- Javier A Menendez
- ProCURE (Program Against Cancer Therapeutic Resistance), Metabolism and Cancer Group, Catalan Institute of Oncology, Girona, Catalonia, Spain.,Molecular Oncology Group, Girona Biomedical Research Institute (IDIBGI), Salt, Catalonia, Spain
| | - Núria Folguera-Blasco
- Computational and Mathematical Biology Research Group, Centre de Recerca Matemàtica (CRM), Barcelona, Spain
| | - Elisabet Cuyàs
- ProCURE (Program Against Cancer Therapeutic Resistance), Metabolism and Cancer Group, Catalan Institute of Oncology, Girona, Catalonia, Spain.,Molecular Oncology Group, Girona Biomedical Research Institute (IDIBGI), Salt, Catalonia, Spain
| | - Salvador Fernández-Arroyo
- Unitat de Recerca Biomèdica, Hospital Universitari de Sant Joan, IISPV, Universitat Rovira i Virgili, Campus of International Excellence Southern Catalonia, Reus, Spain
| | - Jorge Joven
- Unitat de Recerca Biomèdica, Hospital Universitari de Sant Joan, IISPV, Universitat Rovira i Virgili, Campus of International Excellence Southern Catalonia, Reus, Spain
| | - Tomás Alarcón
- Computational and Mathematical Biology Research Group, Centre de Recerca Matemàtica (CRM), Barcelona, Spain.,Institució Catalana d'Estudis i Recerca Avançats (ICREA), Barcelona, Spain.,Departament de Matemàtiques, Universitat Autònoma de Barcelona, Barcelona, Spain.,Barcelona Graduate School of Mathematics (BGSMath), Barcelona, Spain
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9
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Micro-encapsulation of folic acid using horse chestnut starch and β-cyclodextrin: Microcapsule characterization, release behavior & antioxidant potential during GI tract conditions. Food Hydrocoll 2017. [DOI: 10.1016/j.foodhyd.2016.11.012] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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10
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Development of a Simple, Fast, and Quantitative Lateral Flow Immunochromatographic Strip for Folic Acid. FOOD ANAL METHOD 2017. [DOI: 10.1007/s12161-017-0804-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Kim SJ, Zuchniak A, Sohn KJ, Lubinski J, Demsky R, Eisen A, Akbari MR, Kim YI, Narod SA, Kotsopoulos J. Plasma folate, vitamin B-6, and vitamin B-12 and breast cancer risk in BRCA1- and BRCA2-mutation carriers: a prospective study. Am J Clin Nutr 2016; 104:671-7. [PMID: 27465373 DOI: 10.3945/ajcn.116.133470] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 06/15/2016] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND B vitamins [vitamins B-6, B-9 (folate), and B-12] play important roles in nucleotide biosynthesis and biological methylation reactions, aberrancies of which have all been implicated in carcinogenesis. In the general population, evidence has suggested that high circulating folate and folic acid (synthetic form of folate) supplement use may increase breast cancer risk, but the role of folate in BRCA-associated breast cancer is not clear. OBJECTIVE We prospectively evaluated the relation between plasma folate, pyridoxal 5'-phosphate (PLP; the biologically active form of vitamin B-6), and vitamin B-12 and breast cancer risk in women with a BRCA1/2 mutation. DESIGN Baseline blood samples and biennial follow-up questionnaires were available for 164 BRCA1/2-mutation carriers with no previous history of cancer other than nonmelanoma skin cancer. Plasma folate, PLP, and vitamin B-12 concentrations were categorized dichotomously as high compared with low based on the upper 25% and the lower 75% of distribution, respectively. Cox proportional hazards were used to estimate the HR and 95% CI for the association between plasma biomarkers of each B vitamin and incident breast cancer. RESULTS Over a mean follow-up of 6.3 y, 20 incident primary invasive breast cancers were observed. Women with high plasma folate concentrations (>24.4 ng/mL) were associated with significantly increased breast cancer risk (HR: 3.20; 95% CI: 1.03, 9.92; P = 0.04, P-trend across quintiles = 0.07) compared with that of women with low plasma folate concentrations (≤24.4 ng/mL). Plasma PLP and vitamin B-12 concentrations were not associated with breast cancer risk. CONCLUSIONS Our data suggest that elevated plasma folate concentrations may be associated with increased risk of breast cancer in women with a BRCA1/2 mutation. Additional studies with a larger sample size and longer follow-up periods are warranted to clarify the relation between folate status and breast cancer risk in high-risk women.
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Affiliation(s)
- Shana J Kim
- Departments of Nutritional Sciences, Women's College Research Institute, Women's College Hospital, Toronto, Canada
| | - Anna Zuchniak
- Departments of Nutritional Sciences, Keenan Research Centre for Biomedical Science of St. Michael's Hospital and
| | - Kyoung-Jin Sohn
- Medicine, and Keenan Research Centre for Biomedical Science of St. Michael's Hospital and
| | - Jan Lubinski
- Department of Genetics and Pathology, International Hereditary Cancer Center, Pomeranian Medical University, Szczecin, Poland
| | - Rochelle Demsky
- Molecular Genetics and Department of Gynecologic Oncology, Princess Margaret Cancer Center, University Health Network, Toronto, Canada; and
| | - Andrea Eisen
- Toronto-Sunnybrook Regional Cancer Center, Toronto, Canada
| | - Mohammad R Akbari
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada; Women's College Research Institute, Women's College Hospital, Toronto, Canada
| | - Young-In Kim
- Departments of Nutritional Sciences, Medicine, and Keenan Research Centre for Biomedical Science of St. Michael's Hospital and Division of Gastroenterology, St. Michael's Hospital, Toronto, Canada
| | - Steven A Narod
- Departments of Nutritional Sciences, Medicine, and Dalla Lana School of Public Health, University of Toronto, Toronto, Canada; Women's College Research Institute, Women's College Hospital, Toronto, Canada
| | - Joanne Kotsopoulos
- Departments of Nutritional Sciences, Dalla Lana School of Public Health, University of Toronto, Toronto, Canada; Women's College Research Institute, Women's College Hospital, Toronto, Canada;
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12
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Encapsulation of folic acid in different silica porous supports: A comparative study. Food Chem 2016; 196:66-75. [DOI: 10.1016/j.foodchem.2015.09.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 08/31/2015] [Accepted: 09/05/2015] [Indexed: 02/02/2023]
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13
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Brenner DR, Brockton NT, Kotsopoulos J, Cotterchio M, Boucher BA, Courneya KS, Knight JA, Olivotto IA, Quan ML, Friedenreich CM. Breast cancer survival among young women: a review of the role of modifiable lifestyle factors. Cancer Causes Control 2016; 27:459-72. [PMID: 26970739 PMCID: PMC4796361 DOI: 10.1007/s10552-016-0726-5] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Accepted: 02/06/2016] [Indexed: 02/06/2023]
Abstract
Almost 7 % of breast cancers are diagnosed among women age 40 years and younger in Western populations. Clinical outcomes among young women are worse. Early age-of-onset increases the risk of contralateral breast cancer, local and distant recurrence, and subsequent mortality. Breast cancers in young women (BCYW) are more likely to present with triple-negative (TNBC), TP53-positive, and HER-2 over-expressing tumors than among older women. However, despite these known differences in breast cancer outcomes and tumor subtypes, there is limited understanding of the basic biology, epidemiology, and optimal therapeutic strategies for BCYW. Several modifiable lifestyle factors associated with reduced risk of developing breast cancer have also been implicated in improved prognosis among breast cancer survivors of all ages. Given the treatment-related toxicities and the extended window for late effects, long-term lifestyle modifications potentially offer significant benefits to BCYW. In this review, we propose a model identifying three main areas of lifestyle factors (energy imbalance, inflammation, and dietary nutrient adequacy) that may influence survival in BCYW. In addition, we provide a summary of mechanisms of action and a synthesis of previous research on each of these topics.
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Affiliation(s)
- Darren R Brenner
- Department of Cancer Epidemiology and Prevention Research, CancerControl Alberta, Alberta Health Services, Room 513, Holy Cross Centre, Box ACB, 2210-2nd St. SW, Calgary, AB, T2S 3C3, Canada. .,Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada. .,Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
| | - Nigel T Brockton
- Department of Cancer Epidemiology and Prevention Research, CancerControl Alberta, Alberta Health Services, Room 513, Holy Cross Centre, Box ACB, 2210-2nd St. SW, Calgary, AB, T2S 3C3, Canada.,Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Joanne Kotsopoulos
- Women's College Research Institute, Women's College Hospital, Toronto, ON, Canada.,Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada.,Department of Nutritional Sciences, University of Toronto, Toronto, ON, Canada
| | - Michelle Cotterchio
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada.,Prevention and Cancer Control, Cancer Care Ontario, Toronto, ON, Canada
| | - Beatrice A Boucher
- Department of Nutritional Sciences, University of Toronto, Toronto, ON, Canada.,Prevention and Cancer Control, Cancer Care Ontario, Toronto, ON, Canada
| | - Kerry S Courneya
- Faculty of Physical Education and Recreation, University of Alberta, Edmonton, AB, Canada
| | - Julia A Knight
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada.,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada
| | - Ivo A Olivotto
- Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - May Lynn Quan
- Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.,Department of Surgery, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Christine M Friedenreich
- Department of Cancer Epidemiology and Prevention Research, CancerControl Alberta, Alberta Health Services, Room 513, Holy Cross Centre, Box ACB, 2210-2nd St. SW, Calgary, AB, T2S 3C3, Canada.,Department of Oncology, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.,Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
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14
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Kotsopoulos J, Metcalfe K, Alston J, Nikitina D, Ginsburg O, Eisen A, Demsky R, Akbari M, Zbuk K, Narod SA. Prospective study of high-risk, BRCA1/2-mutation negative women: the 'negative study'. BMC Cancer 2014; 14:221. [PMID: 24667084 PMCID: PMC3973748 DOI: 10.1186/1471-2407-14-221] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 03/10/2014] [Indexed: 12/20/2022] Open
Abstract
Background We previously reported that women from high-risk families who tested negative for a BRCA1 or BRCA2 (BRCA1/2) mutation were four times more likely to develop breast cancer compared to women in the general population. Preventive measures and risk factors for breast cancer development in these high-risk women have not been evaluated to the same extent as BRCA1/2 positive women. Further, there is virtually no scientific evidence about best practices in their management and care. The proposed study will examine a role of genetic and non-genetic factors and develop the systems and parameters for the monitoring and surveillance necessary to help establish guidelines for the care of this high-risk population. Methods/Design To achieve our goals, we will assemble and follow a Canadian cohort of 1,000 cancer-free women with a strong family history breast cancer (defined as two or more relatives affected by breast cancer under the age of 50, or three or more relatives diagnosed with breast cancer at any age from one side of the family and with no BRCA1/2 mutation in the family). All eligible participants will be mailed a study package including invitation to participate, consent form, a research questionnaire to collect data regarding family history, reproductive and lifestyle factors, as well as screening and surgery. Usual dietary intake will be assessed by a diet history questionnaire. Biological samples including toenail clippings, urine and blood samples will be collected. These women will be followed every two years by questionnaire to update exposure information, screening practices, surgical and chemoprevention, and disease development. Discussion Findings from this study will serve to help establish clinical guidelines for the implementation of prevention, counseling, and treatment practices for women who face an elevated risk of breast cancer due to family history, but who do not carry a BRCA1/2 mutation.
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Affiliation(s)
- Joanne Kotsopoulos
- Familial Breast Cancer Unit, Women's College Research Institute, 790 Bay St, 7th Floor, Toronto, ON M5G 1 N8, Canada.
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15
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Deghan Manshadi S, Ishiguro L, Sohn KJ, Medline A, Renlund R, Croxford R, Kim YI. Folic acid supplementation promotes mammary tumor progression in a rat model. PLoS One 2014; 9:e84635. [PMID: 24465421 PMCID: PMC3897399 DOI: 10.1371/journal.pone.0084635] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Accepted: 11/15/2013] [Indexed: 12/31/2022] Open
Abstract
Folic acid supplementation may prevent the development of cancer in normal tissues but may promote the progression of established (pre)neoplastic lesions. However, whether or not folic acid supplementation can promote the progression of established (pre)neoplastic mammary lesions is unknown. This is a critically important issue because breast cancer patients and survivors in North America are likely exposed to high levels of folic acid owing to folic acid fortification and widespread supplemental use after cancer diagnosis. We investigated whether folic acid supplementation can promote the progression of established mammary tumors. Female Sprague-Dawley rats were placed on a control diet and mammary tumors were initiated with 7,12-dimethylbenza[a]anthracene at puberty. When the sentinel tumor reached a predefined size, rats were randomized to receive a diet containing the control, 2.5x, 4x, or 5x supplemental levels of folic acid for up to 12 weeks. The sentinel mammary tumor growth was monitored weekly. At necropsy, the sentinel and all other mammary tumors were analyzed histologically. The effect of folic acid supplementation on the expression of proteins involved in proliferation, apoptosis, and mammary tumorigenesis was determined in representative sentinel adenocarcinomas. Although no clear dose-response relationship was observed, folic acid supplementation significantly promoted the progression of the sentinel mammary tumors and was associated with significantly higher sentinel mammary tumor weight and volume compared with the control diet. Furthermore, folic acid supplementation was associated with significantly higher weight and volume of all mammary tumors. The most significant and consistent mammary tumor-promoting effect was observed with the 2.5x supplemental level of folic acid. Folic acid supplementation was also associated with an increased expression of BAX, PARP, and HER2. Our data suggest that folic acid supplementation may promote the progression of established mammary tumors. The potential tumor-promoting effect of folic acid supplementation in breast cancer patients and survivors needs further clarification.
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Affiliation(s)
- Shaidah Deghan Manshadi
- Department of Nutritional Sciences, University of Toronto and Keenan Research Center for Biomedical Science at St. Michael's Hospital, Toronto, Ontario, Canada
| | - Lisa Ishiguro
- Department of Nutritional Sciences, University of Toronto and Keenan Research Center for Biomedical Science at St. Michael's Hospital, Toronto, Ontario, Canada
| | - Kyoung-Jin Sohn
- Department of Medicine, University of Toronto and Keenan Research Center of Biomedical Science at St. Michael's Hospital, Toronto, Ontario, Canada
| | - Alan Medline
- Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, Ontario, Canada
- Department of Pathology, Humber River Regional Hospital, Toronto, Ontario, Canada
| | - Richard Renlund
- Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | | | - Young-In Kim
- Departments of Medicine & Nutritional Sciences, University of Toronto, Division of Gastroenterology, St. Michael's Hospital and Keenan Research Center of Biomedical Science at St. Michael's Hospital, Toronto, Ontario, Canada
- * E-mail:
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16
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Strickland KC, Krupenko NI, Krupenko SA. Molecular mechanisms underlying the potentially adverse effects of folate. Clin Chem Lab Med 2013; 51:607-16. [PMID: 23241610 DOI: 10.1515/cclm-2012-0561] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Accepted: 11/09/2012] [Indexed: 12/20/2022]
Abstract
The importance of proper consumption of dietary folate for human health has been highlighted by an extensive number of publications over several decades. Fortification of grain products with folic acid was initiated with the specific intent to prevent neural tube defects, and the scope of this endeavor is unique in that its target population (women of the periconceptional period) is many times smaller than the population it affects (everyone who ingests fortified grain products). Folate fortification has been wildly successful in terms of its goal; since its inception, the incidence of neural tube defects has markedly decreased. In the wake of this public health triumph, it is important to catalog both the serendipitous benefits and potential side effects of folic acid supplementation. The vitamin is generally regarded as a harmless nutrient based on studies evaluating the safe upper limits of folate intake. In recent years, however, a concern has been raised with respect to a potential downside to folate supplementation; namely, its proposed ability to enhance proliferation of malignant tumors. The current review summarizes the available literature on the effects of folate supplementation and the molecular mechanisms by which high doses of folate may have negative consequences on human health, especially with regard to cancer.
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Affiliation(s)
- Kyle C Strickland
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, USA
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