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Mongalo NI, Raletsena MV, Munyai R. In Vitro Pharmacological Activity, and Comparison GC-ToF-MS Profiling of Extracts from Cissus cornifolia (Baker) Planch. Life (Basel) 2023; 13:life13030728. [PMID: 36983882 PMCID: PMC10059918 DOI: 10.3390/life13030728] [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: 01/13/2023] [Revised: 02/17/2023] [Accepted: 03/05/2023] [Indexed: 03/30/2023] Open
Abstract
Cissus cornifolia (Baker) Planch is traditionally used in South African traditional medicine (SATM) to treat a variety of human infections. The antimicrobial activity of extracts from C. cornifolia was investigated in vitro against a plethora of pathogenic microorganisms using the microdilution assay. The acetone extract exhibited a notable minimum inhibitory concentration (MIC) value of 0.10 mg/mL against Mycoplasma hominis and a further MIC of 0.20 mg/mL against Candida parapsilosis, Streptococcus agalactiae, Pseudomonas aeruginosa, and Enterococcus faecalis. In the antiproliferative assays, both the ethyl acetate and methanol extracts exhibited a potent inhibition of the MCF-7-21 cell line. In the anti-inflammatory assays, both the ethyl acetate and methanol extracts exhibited IC50 values of 15.59 and 15.78 µg/mL against Cyclooxygenase-2 (COX-2), respectively. Methanol extract further exhibited potent dual inhibition of both COX-2 and 15-LOX enzymes, hence, recommended to curb both related cancers, particularly breast cancer and inflammation-borne diseases. In the comparative gas chromatography time-of-flight mass spectrometry (GC/TOF-MS), the acetone, ethyl acetate, and methanol extract contained significantly prevalent amounts of compound 2-(2',4',4',6',6',8',8'-Heptamethyltetrasiloxan-2'-yloxy)-2,4,4,6,6,8,8,10,10-nonamethylcyclopentasiloxane with % area ranging from 15.714 to 39.225. The findings in the current work validates the use of the plant species in SATM in the treatment of cancer-like infections, opportunistic infections associated with HIV-AIDS. Furthermore, the in vivo studies and the mechanisms of action still need to be explored.
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Affiliation(s)
- Nkoana I Mongalo
- College of Agriculture and Environmental Sciences Laboratories, University of South Africa, Private Bag X06, Florida 0610, South Africa
| | - Maropeng Vellry Raletsena
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences Horticulture Centre, University of South Africa, Private Bag X6, Florida 1710, South Africa
| | - Rabelani Munyai
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences Horticulture Centre, University of South Africa, Private Bag X6, Florida 1710, South Africa
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Caini S, Cozzolino F, Saieva C, Aprea MC, De Bonfioli Cavalcabo' N, Ermini I, Assedi M, Biagiotti D, Trane C, Facchini L, Bendinelli B, Palli D, Masala G. Serum heavy metals and breast cancer risk: A case-control study nested in the Florence cohort of the EPIC (European Prospective Investigation into Cancer and nutrition) study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 861:160568. [PMID: 36464039 DOI: 10.1016/j.scitotenv.2022.160568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/25/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Chronic exposure to heavy metals is of concern for its potential carcinogenic effect. An association with increased breast cancer (BC) risk was hypothesized, but literature data are conflicting and the question remains unresolved. We aimed to investigate the association between heavy metals and BC risk in a case-control study nested within the Florence section of the EPIC (European Prospective Investigation into Cancer and nutrition) cohort. METHODS We included 150 BC cases and an equal number of controls individually matched to cases by age and year of enrolment. In order to avoid confounding by smoking, the study was restricted to never smokers. Serum levels of six heavy metals (Cd, Co, Cr, Mn, Pb, and Tl) were quantified in pre-diagnostic samples using inductively coupled plasma mass spectrometry. Odds ratios (ORs) and corresponding 95 % confidence intervals (CI) were calculated via multivariable conditional logistic regression models. RESULTS Serum levels of cobalt were inversely associated with BC risk (OR for the comparison of 3rd vs. 1st tertiles: 0.33, 95 % CI 0.12-0.91, p-value 0.033). None of the other heavy metals under study was significantly associated with BC risk in multivariable models. For Cd, Cr, and Tl, over half of the study participants had serum levels below the limit of quantitation. CONCLUSIONS Our results do not support the hypothesis that exposure to heavy metals is associated with an increased BC risk among never smokers from the general population. The inverse association between cobalt serum levels and BC risk requires confirmation in future studies.
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Affiliation(s)
- Saverio Caini
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Via Cosimo Il Vecchio 2, 50139 Florence, Italy.
| | - Flavia Cozzolino
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Via Cosimo Il Vecchio 2, 50139 Florence, Italy.
| | - Calogero Saieva
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Via Cosimo Il Vecchio 2, 50139 Florence, Italy.
| | - Maria Cristina Aprea
- Unit of Occupational and Environmental Toxicology - Public Health Laboratory, Department of Prevention, AUSL South-East Tuscany, Strada del Ruffolo 4, 53100 Siena, Italy.
| | - Nora De Bonfioli Cavalcabo'
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Via Cosimo Il Vecchio 2, 50139 Florence, Italy.
| | - Ilaria Ermini
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Via Cosimo Il Vecchio 2, 50139 Florence, Italy.
| | - Melania Assedi
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Via Cosimo Il Vecchio 2, 50139 Florence, Italy.
| | - Davide Biagiotti
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Via Cosimo Il Vecchio 2, 50139 Florence, Italy.
| | - Cinzia Trane
- Public Health Laboratory, Department of Technical Health Professions, Rehabilitation and Prevention, AUSL South-East Tuscany, Strada del Ruffolo 4, 53100 Siena, Italy.
| | - Luigi Facchini
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Via Cosimo Il Vecchio 2, 50139 Florence, Italy.
| | - Benedetta Bendinelli
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Via Cosimo Il Vecchio 2, 50139 Florence, Italy.
| | - Domenico Palli
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Via Cosimo Il Vecchio 2, 50139 Florence, Italy.
| | - Giovanna Masala
- Clinical Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Via Cosimo Il Vecchio 2, 50139 Florence, Italy.
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Erden Tayhan S, Bilgin S, Yıldırım A, Koç E. Biological Screening of Polyphenol Derivatives for Anti-Proliferative, Anti-Apoptotic and Anti-Migrative Activities in Human Breast Cancer Cell Lines MCF-7. Chem Biodivers 2023; 20:e202200872. [PMID: 36594615 DOI: 10.1002/cbdv.202200872] [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: 09/16/2022] [Accepted: 12/05/2022] [Indexed: 01/04/2023]
Abstract
Breast cancer is known as the most common type of invasive cancer in women. It is well-known that phenolic compounds play an important role in the treatment of this disease. This study hypothesized that isoeugenol based two polyphenolic compounds 1 and 2 exerts its anti-proliferative effects through the induction of apoptosis and cell migration arrest on human breast cancer cell. Based on this hypothesis, the study aimed to investigate the anti-proliferative, anti-migrative effects of these compounds and their possible basic molecular mechanisms of action in MCF-7 cell lines. As a result, isoeugenol-based compounds 1 and 2 showed anti-proliferative, anti-apoptotic and anti-migrative effects in MCF-7 breast cancer cells. This result was supported by molecular analyzes and it was determined that there were changes in the expression of some gene regions involved in apoptosis and migration. Additionally, it was a remarkable result that cell viability inhibition did not occur in healthy breast tissue cells and no cytotoxic effect was observed. The existence of such a differentiation between cancer cells and healthy cells significantly increases the potential of these compounds to be used as chemotherapeutic drug active ingredients without side effects.
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Affiliation(s)
- Seçil Erden Tayhan
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tokat Gaziosmanpasa University, 60250, Tokat, Turkey
| | - Sema Bilgin
- Department of Medical Laboratory Techniques, Vocational School of Health Services, Tokat Gaziosmanpasa University, 60250, Tokat, Turkey
| | - Aslı Yıldırım
- Department of Bioengineering, Institute of Graduate Studies, Tokat Gaziosmanpasa University, 60250, Tokat, Turkey
| | - Esra Koç
- Department of Chemistry, Faculty of Arts and Sciences, Tokat Gaziosmanpasa University, 60250, Tokat, Turkey
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Kiss E, Hajdu A, Forika G, Dank M, Krenacs T, Nemeth Z. The Effect of Dietary Methyl-Donor Intake and Other Lifestyle Factors on Cancer Patients in Hungary. Cancers (Basel) 2022; 14:4432. [PMID: 36139592 PMCID: PMC9496722 DOI: 10.3390/cancers14184432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 08/31/2022] [Accepted: 09/05/2022] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Nutrition is essential to life and can have an indisputable influence on health and prevention of disease development including cancer. Methyl-donors are macronutrients that are important in achieving a healthy balance of metabolic processes. Their deficiency can lead to several symptoms and diseases-even to severe SARS-CoV-2 infection. We aimed to explore the potential protective effect of methyl-donor intake in breast, colorectal and pancreatic cancer by patient follow up. METHODS A food frequency questionnaire and a diet diary were used to evaluate methyl-donor intake and blood samples were taken to evaluate Il-6 and IL-8 cytokine levels as well as MTHFR (C677T) polymorphism in breast, colorectal and pancreatic cancer patients. RESULTS We found that levels around the recommended daily intake of B6 and B9 were effective in supporting the overall survival of breast and colorectal, and a relatively higher level of pancreatic adenocarcinoma, patients. The total intake of methyl-donors significantly and negatively correlated with smoking in pancreatic cancer, while folate as well as betaine intake significantly and positively correlated with IL-8 in colorectal cancer patients. CONCLUSIONS Our results suggest that the appropriate intake of methyl-donor can be an adjunct of conventional oncotherapy to improve quality of life. Whether methyl-donor intake supports cancer prevention and patient survival needs further confirmation in large patient cohorts.
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Affiliation(s)
- Eva Kiss
- Department of Internal Medicine and Oncology, Oncology Profile, Semmelweis University, Koranyi S. u 2/a, 1083 Budapest, Hungary
| | - Anett Hajdu
- Department of Internal Medicine and Oncology, Oncology Profile, Semmelweis University, Koranyi S. u 2/a, 1083 Budapest, Hungary
| | - Gertrud Forika
- Department of Pathology and Experimental Cancer Research, Semmelweis University, Ulloi u. 26, 1085 Budapest, Hungary
| | - Magdolna Dank
- Department of Internal Medicine and Oncology, Oncology Profile, Semmelweis University, Koranyi S. u 2/a, 1083 Budapest, Hungary
| | - Tibor Krenacs
- Department of Pathology and Experimental Cancer Research, Semmelweis University, Ulloi u. 26, 1085 Budapest, Hungary
| | - Zsuzsanna Nemeth
- Department of Internal Medicine and Oncology, Semmelweis University, Koranyi S. u 2/a, 1083 Budapest, Hungary
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Kiss E, Forika G, Dank M, Krenacs T, Nemeth Z. Methyl Donors Reduce Cell Proliferation by Diminishing Erk-Signaling and NFkB Levels, While Increasing E-Cadherin Expression in Panc-1 Cell Line. Int J Mol Sci 2022; 23:2546. [PMID: 35269689 PMCID: PMC8910410 DOI: 10.3390/ijms23052546] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 02/22/2022] [Accepted: 02/24/2022] [Indexed: 02/06/2023] Open
Abstract
Pancreatic cancer is an aggressive malignancy with high metastatic potential. There are several lifestyle-related determinants in its etiology, including diet. Methyl donors are dietary micronutrients which play an important role in fueling vital metabolic pathways, and as bioactive food components provide methyl groups as substrates and cofactors. The imbalanced nutritional status of methyl donors has recently been linked to pathological conditions. Therefore, we hypothesized that dietary methyl donors may improve the physiology of cancer patients, including those with pancreatic cancer, and could be used for intervention therapy. In this study, methyl-donor treatment (L-methionine, choline chloride, folic acid and vitamin B12) of an aggressive pancreatic adenocarcinoma cell line (Panc-1) resulted in significantly increased p21WAF1/Cip1 cyclin-dependent kinase inhibitor levels, along with apoptotic SubG1 fractions. At the same time, phospho-Erk1/2 levels and proliferation rate were significantly reduced. Though methyl-donor treatments also increased the pro-apoptotic protein Bak, Puma and Caspase-9, it failed to elevate cleaved Caspase-3 levels. In addition, the treatment significantly reduced the production of the pro-inflammatory cytokine IL-17a and the transcription factor NFkB. Similarly, a significant decrease in VEGF and SDF-1a levels were detected, which may indicate reduced metastatic potential. As expected, E-cadherin expression was inversely associated with these changes, showing elevated expression after methyl-donor treatment. In summary, we found that methyl donors may have the potential to reduce aggressive and proliferative phenotype of Panc-1 cells. This suggests a promising role of dietary methyl donors for complementing relevant cancer therapies, even in treatment-resistant pancreatic adenocarcinomas.
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Affiliation(s)
- Eva Kiss
- 1st Department of Internal Medicine and Oncology, Oncology Profile, Semmelweis University, 1083 Budapest, Hungary; (E.K.); (M.D.)
| | - Gertrud Forika
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, 1085 Budapest, Hungary; (G.F.); (T.K.)
| | - Magdolna Dank
- 1st Department of Internal Medicine and Oncology, Oncology Profile, Semmelweis University, 1083 Budapest, Hungary; (E.K.); (M.D.)
| | - Tibor Krenacs
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, 1085 Budapest, Hungary; (G.F.); (T.K.)
| | - Zsuzsanna Nemeth
- 1st Department of Internal Medicine and Oncology, Semmelweis University, 1083 Budapest, Hungary
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Kiss E, Forika G, Mohacsi R, Nemeth Z, Krenacs T, Dank M. Methyl-Donors Can Induce Apoptosis and Attenuate Both the Akt and the Erk1/2 Mediated Proliferation Pathways in Breast and Lung Cancer Cell Lines. Int J Mol Sci 2021; 22:ijms22073598. [PMID: 33808426 PMCID: PMC8036837 DOI: 10.3390/ijms22073598] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/23/2021] [Accepted: 03/27/2021] [Indexed: 01/04/2023] Open
Abstract
Dietary methyl-donors play important roles in physiological processes catalyzed by B vitamins as coenzymes, and are used for complementary support in oncotherapy. Our hypothesis was that methyl-donors can not only assist in tolerating cancer treatment but may also directly interfere with tumor growth and proliferation. Therefore, we investigated the proposed cancer inhibitory effects of methyl-donors (in a mixture of L-methionine, choline chloride, folic acid, and vitamin B12) on MCF7 and T47D breast cancer as well as A549 and H1650 lung cancer cell lines. Indeed, methyl-donor treatment significantly reduced the proliferation in all cell lines, possibly through the downregulation of MAPK/ERK and AKT signaling. These were accompanied by the upregulation of the pro-apoptotic Bak and Bax, both in MCF7 and H1650 cells, at reduced anti-apoptotic Mcl-1 and Bcl-2 levels in MCF7 and H1650 cells, respectively. The treatment-induced downregulation of p-p53(Thr55) was likely to contribute to protecting the nuclear localization and apoptosis inducing functions of p53. The presented features are known to improve the sensitivity of cancer therapy. Therefore, these data support the hypothesis, i.e., that methyl-donors may promote apoptotic signaling by protecting p53 functions through downregulating both the MAPK/ERK and the AKT pathways both in breast and lung adenocarcinoma cell lines. Our results can emphasize the importance and benefits of the appropriate dietary supports in cancer treatments. However, further studies are required to confirm these effects without any adverse outcome in clinical settings.
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Affiliation(s)
- Eva Kiss
- 1st Department of Internal Medicine and Oncology, Oncology Profile, Semmelweis University, 1085 Budapest, Hungary; (E.K.); (R.M.); (M.D.)
| | - Gertrud Forika
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, 1085 Budapest, Hungary; (G.F.); (T.K.)
| | - Reka Mohacsi
- 1st Department of Internal Medicine and Oncology, Oncology Profile, Semmelweis University, 1085 Budapest, Hungary; (E.K.); (R.M.); (M.D.)
| | - Zsuzsanna Nemeth
- 1st Department of Internal Medicine and Oncology, Oncology Profile, Semmelweis University, 1085 Budapest, Hungary; (E.K.); (R.M.); (M.D.)
- Correspondence: ; Tel.: +36-20-670-1025
| | - Tibor Krenacs
- 1st Department of Pathology and Experimental Cancer Research, Semmelweis University, 1085 Budapest, Hungary; (G.F.); (T.K.)
| | - Magdolna Dank
- 1st Department of Internal Medicine and Oncology, Oncology Profile, Semmelweis University, 1085 Budapest, Hungary; (E.K.); (R.M.); (M.D.)
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Maternal gestational betaine supplementation-mediated suppression of hepatic cyclin D2 and presenilin1 gene in newborn piglets is associated with epigenetic regulation of the STAT3-dependent pathway. J Nutr Biochem 2015; 26:1622-31. [DOI: 10.1016/j.jnutbio.2015.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 08/04/2015] [Accepted: 08/05/2015] [Indexed: 01/19/2023]
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DNA methylation and apoptosis resistance in cancer cells. Cells 2013; 2:545-73. [PMID: 24709797 PMCID: PMC3972670 DOI: 10.3390/cells2030545] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2013] [Revised: 06/27/2013] [Accepted: 06/28/2013] [Indexed: 01/13/2023] Open
Abstract
Apoptosis is a cell death programme primordial to cellular homeostasis efficiency. This normal cell suicide program is the result of the activation of a cascade of events in response to death stimuli. Apoptosis occurs in normal cells to maintain a balance between cell proliferation and cell death. A deregulation of this balance due to modifications in the apoptosic pathway leads to different human diseases including cancers. Apoptosis resistance is one of the most important hallmarks of cancer and some new therapeutical strategies focus on inducing cell death in cancer cells. Nevertheless, cancer cells are resistant to treatment inducing cell death because of different mechanisms, such as DNA mutations in gene coding for pro-apoptotic proteins, increased expression of anti-apoptotic proteins and/or pro-survival signals, or pro-apoptic gene silencing mediated by DNA hypermethylation. In this context, aberrant DNA methylation patterns, hypermethylation and hypomethylation of gene coding for proteins implicated in apoptotic pathways are possible causes of cancer cell resistance. This review highlights the role of DNA methylation of apoptosis-related genes in cancer cell resistance.
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Cho K, Mabasa L, Walters MW, Park CS. Lipotropes enhance the anti-proliferative effect of chemotherapeutic drugs in MCF-7 human breast cancer cells. Oncol Rep 2013; 29:2237-42. [PMID: 23588242 DOI: 10.3892/or.2013.2404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Accepted: 02/15/2013] [Indexed: 11/06/2022] Open
Abstract
Increasing evidence indicates that dietary intake of methyl nutrients is associated with the risk of breast cancer. Lipotropes are methyl group-containing essential nutrients (methionine, choline, folate and vitamin B12) which play key roles in one-carbon metabolism; however, little is known about the implications of lipotropes in possible tumor-suppressive effects with chemotherapeutic drugs for breast cancer. In the present study, we investigated the in vitro effects of lipotropes on cell growth and apoptosis of MCF-7 human breast cancer cells. Cells were cultured and treated with lipotropes, and cell proliferation, apoptosis and gene expression were determined. Also, the possible synergistic effects of lipotropes with anticancer drugs, the histone deacetylase inhibitor suberoylanilide hydroxamic acid (SAHA) and doxorubicin (DOX), were examined. Lipotropes significantly reduced the growth of MCF-7 cells and increased apoptosis as well as upregulation of caspase-3 and tumor protein 53 (p53) enzyme activities. Gene transcription, as measured by quantitative real-time PCR, revealed a significant increase of p53 mRNA in MCF-7 cells treated with lipotropes, but there were no differences in two drug-resistant related genes. Moreover, lipotropes showed significant additive effects with SAHA and DOX on cell growth inhibition. These results suggest that lipotropes induce apoptosis, inhibit cell growth, and display anti-proliferative effects with SAHA and DOX in MCF-7 cells. Owing to the tumor-suppressive effects observed, lipotropes in combination with chemotherapeutic drugs may be tested further in animal models as potential therapeutic agents for reducing breast cancer risk.
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Affiliation(s)
- Kyongshin Cho
- Department of Animal Sciences, North Dakota State University, Fargo, ND 58102, USA
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Wu Q, Shigaki T, Han JS, Kim CK, Hirschi KD, Park S. Ectopic expression of a maize calreticulin mitigates calcium deficiency-like disorders in sCAX1-expressing tobacco and tomato. PLANT MOLECULAR BIOLOGY 2012; 80:609-19. [PMID: 23007728 DOI: 10.1007/s11103-012-9970-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2012] [Accepted: 09/14/2012] [Indexed: 06/01/2023]
Abstract
Deregulated expression of an Arabidopsis H⁺/Ca²⁺ antiporter (sCAX1) in agricultural crops increases total calcium (Ca²⁺) but may result in yield losses due to Ca²⁺ deficiency-like symptoms. Here we demonstrate that co-expression of a maize calreticulin (CRT, a Ca²⁺ binding protein located at endoplasmic reticulum) in sCAX1-expressing tobacco and tomato plants mitigated these adverse effects while maintaining enhanced Ca²⁺ content. Co-expression of CRT and sCAX1 could alleviate the hypersensitivity to ion imbalance in tobacco plants. Furthermore, blossom-end rot (BER) in tomato may be linked to changes in CAX activity and enhanced CRT expression mitigated BER in sCAX1 expressing lines. These findings suggest that co-expressing Ca²⁺ transporters and binding proteins at different intracellular compartments can alter the content and distribution of Ca²⁺ within the plant matrix.
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Affiliation(s)
- Qingyu Wu
- Department of Horticulture, Forestry and Recreation Resources, Kansas State University, Manhattan, KS 66506, USA
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Cho K, Mabasa L, Bae S, Walters MW, Park CS. Maternal high-methyl diet suppresses mammary carcinogenesis in female rat offspring. Carcinogenesis 2012; 33:1106-1112. [DOI: 10.1093/carcin/bgs125] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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Mabasa L, Cho K, Bae S, Walsh DM, Asija P, Park CS. Lipotropes (methyl nutrients) inhibit growth of feline lymphoma in vitro. Res Vet Sci 2011; 93:259-63. [PMID: 21665236 DOI: 10.1016/j.rvsc.2011.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 03/16/2011] [Accepted: 05/18/2011] [Indexed: 10/18/2022]
Abstract
Feline lymphoma is one of the most frequently diagnosed tumors in cats. Lipotropes are dietary methyl donors that may modulate DNA methylation status and the expression of genes involved in growth and apoptosis of feline lymphoma cells. The specific objective of the study was to determine if lipotropes affect the growth of feline lymphoma cells, which entailed examining a correlation between lymphoma cell proliferation and apoptosis. F1B and FeLV-3281 cells were cultured and treated with 20 times the level of lipotropes contained in the basal culture medium. Cell growth and death and caspase 3 and tumor protein p53 activity were measured. Lipotropes were found to significantly reduce cell growth; increased cell death and caspase 3 and p53 activity was seen in F1B cells after 72 h, but the effect was minimal on FeLV-3281. These results could be useful in the development of dietary strategies for treating and preventing feline lymphoma.
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Affiliation(s)
- L Mabasa
- Department of Animal Sciences, North Dakota State University, Fargo, ND 58108, USA
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Pan G, Winter TN, Roberts JC, Fairbanks CA, Elmquist WF. Organic cation uptake is enhanced in bcrp1-transfected MDCKII cells. Mol Pharm 2010; 7:138-45. [PMID: 19886673 DOI: 10.1021/mp900177r] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Stably transfected cell models are routinely used to examine drug-transporter interactions. In one such model of bcrp1-transfected MDCKII cells, we observed a significant enhancement of organic cation intracellular accumulation. Therefore, our goal was to further explore the expression and functional consequences of this cation transport system. Transport assays were carried out in wild-type and bcrp1-transfected MDCKII cells to examine uptake of [3H]-prazosin (bcrp1 positive control), [3H]-agmatine, [3H]-TEA, and [14C]-choline. RT-PCR was employed to determine the mRNA levels of bcrp1 and OCT2/OCT3. Western blots were used to evaluate corresponding protein levels. Accumulation studies determined a significant increase in the uptake of the organic cations agmatine, TEA, and choline in bcrp1-transfected cells when compared to wild-type cells. Directional transport of [3H]-agmatine showed a significantly greater apical (A) to basolateral (B) than B-to-A flux in both cell types. In spite of this, the A-to-B flux was significantly lower in bcrp1-transfected cells. RT-PCR revealed 10-fold higher OCT2 mRNA levels in bcrp1-transfected cells, with no changes in OCT3. OCT2 protein expression was approximately 3.5-fold higher in bcrp1-transfected cells. The upregulation of OCT2 in bcrp1-transfected MDCKII cells contributed to a significant enhancement in the uptake of several organic cations. These results are consistent with the endogenous expression of OCT2 in the kidney tubule, and may be related to the expression and function of bcrp1. Our findings illustrate the importance of understanding how endogenous transporters, which may compete for common substrates, may be influenced by the overexpression and enhanced function of recombinant transport systems.
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Affiliation(s)
- Guoyu Pan
- Department of Pharmaceutics, University of Minnesota, 308 Harvard Street SE, Minneapolis, Minnesota 55455, USA
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