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Brane A, Arora I, Tollefsbol TO. Peripubertal Nutritional Prevention of Cancer-Associated Gene Expression and Phenotypes. Cancers (Basel) 2023; 15:674. [PMID: 36765634 PMCID: PMC9913820 DOI: 10.3390/cancers15030674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/12/2023] [Accepted: 01/16/2023] [Indexed: 01/25/2023] Open
Abstract
Breast cancer (BC) is a nearly ubiquitous malignancy that effects the lives of millions worldwide. Recently, nutritional prevention of BC has received increased attention due to its efficacy and ease of application. Chief among chemopreventive compounds are plant-based substances known as dietary phytochemicals. Sulforaphane (SFN), an epigenetically active phytochemical found in cruciferous vegetables, has shown promise in BC prevention. In addition, observational studies suggest that the life stage of phytochemical consumption may influence its anticancer properties. These life stages, called critical periods (CPs), are associated with rapid development and increased susceptibility to cellular damage. Puberty, a CP in which female breast tissue undergoes proliferation and differentiation, is of particular interest for later-life BC development. However, little is known about the importance of nutritional chemoprevention to CPs. We sought to address this by utilizing two estrogen receptor-negative [ER(-)] transgenic mouse models fed SFN-containing broccoli sprout extract during the critical period of puberty. We found that this treatment resulted in a significant decrease in tumor incidence and weight, as well as an increase in tumor latency. Further, we found significant alterations in the long-term expression of cancer-associated genes, including p21, p53, and BRCA2. Additionally, our transcriptomic analyses identified expressional changes in many cancer-associated genes, and bisulfite sequencing revealed that the antiproliferation-associated gene Erich4 was both hypomethylated and overexpressed in our experimental group. Our study indicates that dietary interventions during the CP of puberty may be important for later-life ER(-) BC prevention and highlights potential important genetic and epigenetic targets for treatment and study of the more deadly variants of BC.
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Affiliation(s)
- Andrew Brane
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35233, USA
| | - Itika Arora
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Trygve O. Tollefsbol
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35233, USA
- O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Integrative Center for Aging Research, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Nutrition Obesity Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- University Wide Microbiome Center, University of Alabama Birmingham, Birmingham, AL 35294, USA
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Arora I, Li S, Crowley MR, Li Y, Tollefsbol TO. Genome-Wide Analysis on Transcriptome and Methylome in Prevention of Mammary Tumor Induced by Early Life Combined Botanicals. Cells 2022; 12:cells12010014. [PMID: 36611809 PMCID: PMC9818885 DOI: 10.3390/cells12010014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/16/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
Breast cancer (BC) is the most common malignancy and the second leading cause of cancer death among women in the United States. The consumption of natural dietary components such as broccoli sprouts (BSp) and green tea polyphenols (GTPs) has demonstrated exciting potential in reducing the risk of BC through the regulation of epigenetic mechanisms. However, little is known about their impacts on reversing epigenomic aberrations that are centrally involved in the initiation and progression of BC. Previously, we have determined the efficacy of combined BSp and GTPs treatment on the inhibition of the growth of a mammary tumor in a transgenic Her2/neu mouse model. We sought to extend our previous study to identify universal biomarkers that represent common mechanistic changes among different mouse models in response to this dietary regime by including a new transgenic mouse model, C3(1)-SV40 TAg (SV40). As a result, we identified novel target genes that were differentially expressed and methylated in response to dietary botanicals when administered singly (BSp and GTPs) and in combination (BSp + GTPs) in both mouse models. We discovered more differentially expressed and methylated genes in the combination treatment group compared to the singly administered groups. Subsequently, several biological pathways related to epigenetic regulations were identified in response to the combination treatment. Furthermore, when compared to the BSp and GTPs treatment alone, the combinatorial treatment showed a more significant impact on the regulation of the epigenetic modifier activities involved in DNA methylation and histone modifications. Our study provides key insights about the impact of the combined administration of BSp and GTPs on BC using a multi-omics analysis, suggesting a combinatorial approach is more efficacious in preventing and inhibiting BC by impacting key tumor-related genes at transcriptomic and methylomic levels. Our findings could be further extrapolated as a comprehensive source for understanding the epigenetic modifications that are associated with the effects of these dietary botanicals on BC prevention.
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Affiliation(s)
- Itika Arora
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Shizhao Li
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Michael R. Crowley
- Heflin Center for Genomic Science, Department of Genetics, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Yuanyuan Li
- Department of Nutrition and Food Science, University of Maryland, College Park, MD 20742, USA
- Correspondence: (Y.L.); (T.O.T.)
| | - Trygve O. Tollefsbol
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Integrative Center for Aging Research, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Nutrition Obesity Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Correspondence: (Y.L.); (T.O.T.)
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Ayipo YO, Ajiboye AT, Osunniran WA, Jimoh AA, Mordi MN. Epigenetic oncogenesis, biomarkers and emerging chemotherapeutics for breast cancer. BIOCHIMICA ET BIOPHYSICA ACTA. GENE REGULATORY MECHANISMS 2022; 1865:194873. [PMID: 36064110 DOI: 10.1016/j.bbagrm.2022.194873] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 08/20/2022] [Accepted: 08/28/2022] [Indexed: 06/15/2023]
Abstract
Breast cancer remains one of the leading causes of cancer-related deaths globally and the most prominent among females, yet with limited effective therapeutic options. Most of the current medications are challenged by various factors including low efficacy, incessant resistance, immune evasion and frequent recurrence of the disease. Further understanding of the prognosis and identification of plausible therapeutic channels thus requires multimodal approaches. In this review, epigenetics studies of several pathways to BC oncogenesis via the inducement of oncogenic changes on relevant markers have been overviewed. Similarly, the counter-epigenetic mechanisms to reverse such changes as effective therapeutic strategies were surveyed. The epigenetic oncogenesis occurs through several pathways, notably, DNMT-mediated hypermethylation of DNA, dysregulated expression for ERα, HER2/ERBB and PR, histone modification, overexpression of transcription factors including the CDK9-cyclin T1 complex and suppression of tumour suppressor genes. Scientifically, the regulatory reversal of the mechanisms constitutes effective epigenetic approaches for mitigating BC initiation, progression and metastasis. These were exhibited at various experimental levels by classical chemotherapeutic agents including some repurposable drugs, endocrine inhibitors, monoclonal antibodies and miRNAs, natural products, metal complexes and nanoparticles. Dozens of the potential candidates are currently in clinical trials while others are still at preclinical experimental stages showing promising anti-BC efficacy. The review presents a model for a wider understanding of epigenetic oncogenic pathways to BC and reveals plausible channels for reversing the unpleasant changes through epigenetic modifications. It advances the science of therapeutic designs for ameliorating the global burden of BC upon further translational studies.
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Affiliation(s)
- Yusuf Oloruntoyin Ayipo
- Centre for Drug Research, Universiti Sains Malaysia, USM, 11800 Pulau Pinang, Malaysia; Department of Chemistry and Industrial Chemistry, Kwara State University, P.M.B., Malete, 1530 Ilorin, Nigeria.
| | - Abdulfatai Temitope Ajiboye
- Department of Chemistry and Industrial Chemistry, Kwara State University, P.M.B., Malete, 1530 Ilorin, Nigeria
| | - Wahab Adesina Osunniran
- Department of Chemistry and Industrial Chemistry, Kwara State University, P.M.B., Malete, 1530 Ilorin, Nigeria
| | - Akeem Adebayo Jimoh
- Department of Chemistry and Industrial Chemistry, Kwara State University, P.M.B., Malete, 1530 Ilorin, Nigeria
| | - Mohd Nizam Mordi
- Centre for Drug Research, Universiti Sains Malaysia, USM, 11800 Pulau Pinang, Malaysia
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Sharma M, Arora I, Chen M, Wu H, Crowley MR, Tollefsbol TO, Li Y. Therapeutic Effects of Dietary Soybean Genistein on Triple-Negative Breast Cancer via Regulation of Epigenetic Mechanisms. Nutrients 2021; 13:3944. [PMID: 34836197 PMCID: PMC8623013 DOI: 10.3390/nu13113944] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/01/2021] [Accepted: 11/02/2021] [Indexed: 12/22/2022] Open
Abstract
Consumption of dietary natural components such as genistein (GE) found in soy-rich sources is strongly associated with a lower risk of breast cancer. However, bioactive dietary component-based therapeutic strategies are largely understudied in breast cancer treatment. Our investigation sought to elucidate the potential mechanisms linking bioactive dietary GE to its breast cancer chemotherapeutic potential in a special subtype of aggressive breast cancer-triple-negative breast cancer (TNBC)-by utilizing two preclinical patient-derived xenograft (PDX) orthotopic mouse models: BCM-3204 and TM00091. Our study revealed that administration of GE resulted in a delay of tumor growth in both PDX models. With transcriptomics analyses in TNBC tumors isolated from BCM-3204 PDXs, we found that dietary soybean GE significantly influenced multiple tumor-regulated gene expressions. Further validation assessment of six candidate differentially expressed genes (DEGs)-Cd74, Lpl, Ifi44, Fzd9, Sat1 and Wwc1-demonstrated a similar trend at gene transcriptional and protein levels as observed in RNA-sequencing results. Mechanistically, GE treatment-induced Cd74 downregulation regulated the NF-κB/Bcl-xL/TAp63 signal pathway, which may contribute to soybean GE-mediated therapeutic effects on TNBC tumors. Additionally, our findings revealed that GE can modify expression levels of key epigenetic-associated genes such as DNA methyltransferases (Dnmt3b), ten-eleven translocation (Tet3) methylcytosine dioxygenases and histone deacetyltransferase (Hdac2), and their enzymatic activities as well as genomic DNA methylation and histone methylation (H3K9) levels. Collectively, our investigation shows high significance for potential development of a novel therapeutic approach by using bioactive soybean GE for TNBC patients who have few treatment options.
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Affiliation(s)
- Manvi Sharma
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (M.S.); (I.A.); (H.W.)
| | - Itika Arora
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (M.S.); (I.A.); (H.W.)
| | - Min Chen
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
| | - Huixin Wu
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (M.S.); (I.A.); (H.W.)
| | - Michael R. Crowley
- Department of Genetics, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
| | - Trygve O. Tollefsbol
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (M.S.); (I.A.); (H.W.)
- O’Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Integrative Center for Aging Research, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Nutrition Obesity Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Yuanyuan Li
- Department of Obstetrics, Gynecology & Women’s Heath, University of Missouri, Columbia, MO 65211, USA
- Department of Surgery, University of Missouri, Columbia, MO 65211, USA
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