1
|
Shellenberger RA, Gowda S, Kurn H, Albright J, Mayo MH. Vitamin D insufficiency and serum levels related to the incidence and stage of cutaneous melanoma: a systematic review and meta-analysis. Melanoma Res 2023; 33:265-274. [PMID: 37199748 DOI: 10.1097/cmr.0000000000000897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Cutaneous melanoma (CM) is the deadliest skin cancer, and vitamin D insufficiency has been suggested as a risk factor. We evaluated the relationship between both vitamin D insufficiency and 25-hydroxy vitamin D levels with the incidence and stage of CM. Five databases were searched from inception until 11 July 2022. Inclusion criteria were cohort and case-control studies that reported mean 25-hydroxy vitamin D levels or the presence of vitamin D insufficiency in CM patients and compared with healthy controls; or those that reported vitamin D insufficiency and Breslow tumor depth or the development of metastasis in CM. Fourteen studies were included in the analysis. Statistically significant relationships were found between vitamin D level <20 ng/dl and incidence of CM [pooled RR 1.45, 95% confidence interval (CI) 1.04-2.02]; lower mean vitamin D level and Breslow depth >1 mm (SMD 0.19, 95% CI 0.11-0.28); and vitamin D level >20 ng/dl and Breslow depth <1 mm (pooled RR 0.69, 95% CI 0.58-0.82). Statistical significance was not found in the relationships between vitamin D levels and the presence of metastasis (pooled SMD -0.13, 95% CI, -0.38 to 0.12); or mean vitamin D level and the incidence of CM (pooled SMD -0.39, 95% CI, -0.80 to 0.01). We identified an association of increased incidence of CM and vitamin D insufficiency, as well as less favorable Breslow tumor depth with lower levels of vitamin D and the presence of vitamin D insufficiency.
Collapse
Affiliation(s)
| | - Sunaina Gowda
- Department of Internal Medicine, Trinity Health Ann Arbor Hospital, Ann Arbor, Michigan
| | - Heidi Kurn
- Department of Internal Medicine, Trinity Health Ann Arbor Hospital, Ann Arbor, Michigan
| | | | - MacKenzie H Mayo
- Department of Internal Medicine, Trinity Health Ann Arbor Hospital, Ann Arbor, Michigan
| |
Collapse
|
2
|
Abstract
Increasing scientific evidence supports the link between vitamin D and cancer risk. The active metabolite 1,25(OH)2D exerts its activity by binding to the vitamin D receptor (VDR), an intracellular receptor that mediates transcriptional activation and repression of target genes. The binding of 1,25(OH)2D to VDR is able to regulate hundreds of different genes. VDR is active in virtually all tissues including the colon, breast, lung, ovary, bone, kidney, parathyroid gland, pancreatic b-cells, monocytes, T lymphocytes, melanocytes, keratinocytes, and also cancer cells.The relevance of VDR gene restriction fragment length polymorphisms for various types of cancer has been investigated by a great number of studies.We have carried out a systematic review of the literature to analyze the relevance of more VDR polymorphisms (Fok1, Bsm1, Taq1, Apa1, and Cdx2) for individual malignancies considering ethnicity as a key factor for heterogeneity.Up to December 2018, we identified 176 independent studies with data to assess the risk of breast, prostate, colorectal, skin (melanoma and non-melanoma skin cancer), lung, ovarian, kidney, bladder, gallbladder, esophageal, thyroid, head and neck, liver and pancreatic cancer, oral squamous cell carcinoma, non-Hodgkin lymphoma, multiple myeloma and sarcoma.Significant associations with VDR polymorphisms have been reported for prostate (Fok1, Bsm1, Taq1, Apa1, Cdx2), breast (Fok1, Bsm1, Taq1, Apa1, CdX2), colorectal (Fok1, Bsm1, Taq1, Apa1), and skin cancer (Fok1, Bsm1, Taq1). Very few studies reported risk estimates for the other cancer sites.Conflicting data have been reported for most malignancies, and at present, it is still not possible to make any definitive statements about the importance of the VDR genotype for cancer risk. It seems probable that other factors such as ethnicity, phenotype, 25(OH)D plasma levels, and UV radiation exposure play a role as confounding factors and introduce heterogeneity.To conclude, there is some indication that VDR polymorphisms may modulate the risk of some cancer sites and in future studies VDR genetic variation should be integrated also with assessment of vitamin D status and stratified by ethnicity.
Collapse
|
3
|
Yang K, Oak AS, Slominski RM, Brożyna AA, Slominski AT. Current Molecular Markers of Melanoma and Treatment Targets. Int J Mol Sci 2020; 21:ijms21103535. [PMID: 32429485 PMCID: PMC7278971 DOI: 10.3390/ijms21103535] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/08/2020] [Accepted: 05/13/2020] [Indexed: 12/17/2022] Open
Abstract
Melanoma is a deadly skin cancer that becomes especially difficult to treat after it metastasizes. Timely identification of melanoma is critical for effective therapy, but histopathologic diagnosis can frequently pose a significant challenge to this goal. Therefore, auxiliary diagnostic tools are imperative to facilitating prompt recognition of malignant lesions. Melanoma develops as result of a number of genetic mutations, with UV radiation often acting as a mutagenic risk factor. Novel methods of genetic testing have improved detection of these molecular alterations, which subsequently revealed important information for diagnosis and prognosis. Rapid detection of genetic alterations is also significant for choosing appropriate treatment and developing targeted therapies for melanoma. This review will delve into the understanding of various mutations and the implications they may pose for clinical decision making.
Collapse
Affiliation(s)
- Kevin Yang
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (K.Y.); (A.S.O.)
| | - Allen S.W. Oak
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (K.Y.); (A.S.O.)
| | - Radomir M. Slominski
- Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
| | - Anna A. Brożyna
- Department of Human Biology, Institute of Biology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, 87-100 Toruń, Poland;
| | - Andrzej T. Slominski
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294, USA; (K.Y.); (A.S.O.)
- Comprehensive Cancer Center, Cancer Chemoprevention Program, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Veteran Administration Medical Center, Birmingham, AL 35294, USA
- Correspondence:
| |
Collapse
|
4
|
Tagliabue E, Raimondi S, Gandini S. Vitamin D, Cancer Risk, and Mortality. ADVANCES IN FOOD AND NUTRITION RESEARCH 2015; 75:1-52. [PMID: 26319903 DOI: 10.1016/bs.afnr.2015.06.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Antiproliferative effects of 1,25-dihydroxyvitamin D, the biologically active form of vitamin D, are well established in various cell types by influencing cell differentiation and decreasing cell proliferation, growth, invasion, angiogenesis, and metastasis. Several meta-analyses showed that low serum levels of 25(OH)D was associated with colorectal cancer and overall mortality, while the association with cancer mortality was less consistent. VDR is a crucial mediator for the cellular effects of vitamin D and conflicting data have been reported for most malignancies. Beyond VDR, the biological effects of vitamin D are mediated by the vitamin D-binding protein. The GC (group-specific component) gene, encoding DBP, is highly polymorphic and several polymorphisms were investigated in association with cancer development with controversial results. Vitamin D supplementation was found to be associated with a reduced risk of overall mortality, reviewing all published trials on healthy subjects, whereas the evidence of an effect on cancer risk and mortality is less clear. Furthermore, long-term health effects of high doses of vitamin D, extended duration of supplementation, and the association with different baseline vitamin D levels remain to be investigated. In summary, epidemiological and preclinical studies support the development of vitamin D as preventative and therapeutic anticancer agents, with significant associations especially found for low vitamin D status with overall mortality and cancer outcome, more than cancer incidence. However, a definitive conclusion cannot be drawn and only large randomized clinical trials, both in healthy subjects and in cancer patients, will allow to draw definitive conclusions on the effect of vitamin D supplementation on cancer risk, prognosis, and mortality.
Collapse
Affiliation(s)
- Elena Tagliabue
- Division of Epidemiology and Biostatistics, European Institute of Oncology, Milan, Italy
| | - Sara Raimondi
- Division of Epidemiology and Biostatistics, European Institute of Oncology, Milan, Italy
| | - Sara Gandini
- Division of Epidemiology and Biostatistics, European Institute of Oncology, Milan, Italy.
| |
Collapse
|
5
|
Slominski AT, Kim TK, Li W, Yi AK, Postlethwaite A, Tuckey RC. The role of CYP11A1 in the production of vitamin D metabolites and their role in the regulation of epidermal functions. J Steroid Biochem Mol Biol 2014; 144 Pt A:28-39. [PMID: 24176765 PMCID: PMC4002668 DOI: 10.1016/j.jsbmb.2013.10.012] [Citation(s) in RCA: 124] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 09/30/2013] [Accepted: 10/17/2013] [Indexed: 01/08/2023]
Abstract
Research over the last decade has revealed that CYP11A1 can hydroxylate the side chain of vitamin D3 at carbons 17, 20, 22 and 23 to produce at least 10 metabolites, with 20(OH)D3, 20,23(OH)2D3, 20,22(OH)2D3, 17,20(OH)2D3 and 17,20,23(OH)3D3 being the main products. However, CYP11A1 does not act on 25(OH)D3. The placenta, adrenal glands and epidermal keratinocytes have been shown to metabolize vitamin D3 via this CYP11A1-mediated pathway that is modified by the activity of CYP27B1, with 20(OH)D3 (the major metabolite), 20,23(OH)2D3, 1,20(OH)2D3, 1,20,23(OH)3D3 and 17,20,23(OH)3D3 being detected, defining these secosteroids as endogenous regulators/natural products. This is supported by the detection of a mono-hydroxyvitamin D3 with the retention time of 20(OH)D3 in human serum. In new work presented here we demonstrate that the CYP11A1-initiated pathways also occurs in Caco-2 colon cells. Our previous studies show that 20(OH)D3 and 20,23(OH)2D3 are non-calcemic at pharmacological doses, dependent in part on their lack of a C1α hydroxyl group. In epidermal keratinocytes, 20(OH)D3, 20(OH)D2 and 20,23(OH)2D3 inhibited cell proliferation, stimulated differentiation and inhibited NF-κB activity with potencies comparable to 1,25(OH)2D3, acting as partial agonists on the VDR. 22(OH)D3 and 20,22(OH)2D3, as well as secosteroids with a short or no side chain, showed antiproliferative and prodifferentiation effects, however, with lower potency than 20(OH)D3 and 20,23(OH)2D3. The CYP11A1-derived secosteroids also inhibited melanocyte proliferation while having no effect on melanogenesis, and showed anti-melanoma activities in terms of inhibiting proliferation and the ability to grow in soft agar. Furthermore, 20(OH)D3 and 20,23(OH)2D3 showed anti-fibrosing effects in vitro, and also in vivo for the former. New data presented here shows that 20(OH)D3 inhibits LPS-induced production of TNFα in the J774 line, TNFα and IL-6 in peritoneal macrophages and suppresses the production of proinflammatory Th1/Th17-related cytokines, while promoting the production of the anti-inflammatory cytokine IL-10 in vivo. In summary, CYP11A1 initiates new pathways of vitamin D metabolism in a range of tissues and products could have important physiological roles at the local or systemic level. In the skin, CYP11A1-derived secosteroids could serve both as endogenous regulators of skin functions and as excellent candidates for treatment of hyperproliferative and inflammatory skin disorders, and skin cancer. This article is part of a Special Issue entitled '16th Vitamin D Workshop'.
Collapse
Affiliation(s)
- Andrzej T Slominski
- Department of Pathology and Laboratory Medicine, Memphis, TN, USA; Division of Rheumatology and Connective Tissue Diseases of the Department of Medicine, Memphis, TN, USA; Center for Adult Cancer Research, University of Tennessee HSC, Memphis, TN, USA.
| | - Tae-Kang Kim
- Department of Pathology and Laboratory Medicine, Memphis, TN, USA
| | - Wei Li
- Department of Pharmaceutical Sciences, Memphis, TN, USA
| | | | - Arnold Postlethwaite
- Division of Rheumatology and Connective Tissue Diseases of the Department of Medicine, Memphis, TN, USA; Veteran Administration, Memphis, TN, USA
| | - Robert C Tuckey
- School of Chemistry and Biochemistry, The University of Western Australia, Crawley, WA, Australia
| |
Collapse
|
6
|
Tang EKY, Chen J, Janjetovic Z, Tieu EW, Slominski AT, Li W, Tuckey RC. Hydroxylation of CYP11A1-derived products of vitamin D3 metabolism by human and mouse CYP27B1. Drug Metab Dispos 2013; 41:1112-24. [PMID: 23454830 DOI: 10.1124/dmd.113.050955] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
CYP11A1 can hydroxylate vitamin D3 at carbons 17, 20, 22, and 23, producing a range of secosteroids which are biologically active with respect to their ability to inhibit proliferation and stimulate differentiation of various cell types, including cancer cells. As 1α-hydroxylation of the primary metabolite of CYP11A1 action, 20S-hydroxyvitamin D3 [20(OH)D3], greatly influences its properties, we examined the ability of both human and mouse CYP27B1 to 1α-hydroxylate six secosteroids generated by CYP11A1. Based on their kcat/Km values, all CYP11A1-derived metabolites are poor substrates for CYP27B1 from both species compared with 25-hydroxyvitamin D3. No hydroxylation of metabolites with a 17α-hydroxyl group was observed. 17α,20-Dihydroxyvitamin D3 acted as an inhibitor on human CYP27B1 but not the mouse enzyme. We also tested CYP27B1 activity on 20,24-, 20,25-, and 20,26-dihydroxyvitamin D3, which are products of CYP24A1 or CYP27A1 activity on 20(OH)D3. All three compounds were metabolized with higher catalytic efficiency (kcat/Km) by both mouse and human CYP27B1 than 25-hydroxyvitamin D3. CYP27B1 action on these new dihydroxy derivatives was confirmed to be 1α-hydroxylation by mass spectrometry and nuclear magnetic resonance analyses. Both 1,20,25- and 1,20,26- trihydroxyvitamin D3 were tested for their ability to inhibit melanoma (SKMEL-188) colony formation, and were significantly more active than 20(OH)D3. This study shows that CYP11A1-derived secosteroids are 1α-hydroxylated by both human and mouse CYP27B1 with low catalytic efficiency, and that the presence of a 17α-hydroxyl group completely blocks 1α-hydroxylation. In contrast, the secondary metabolites produced by subsequent hydroxylation of 20(OH)D3 at C24, C25, or C26 are very good substrates for CYP27B1.
Collapse
Affiliation(s)
- Edith K Y Tang
- School of Chemistry and Biochemistry, The University of Western Australia, Crawley, Western Australia, Australia
| | | | | | | | | | | | | |
Collapse
|
7
|
Guerrieri-Gonzaga A, Gandini S. Vitamin D and overall mortality. Pigment Cell Melanoma Res 2012; 26:16-28. [PMID: 23045997 DOI: 10.1111/pcmr.12036] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 10/04/2012] [Indexed: 02/06/2023]
Abstract
Vitamin D is a steroid molecule, mainly produced in the skin that regulates the expression of a large number of genes. Several meta-analyses of epidemiological studies support the evidence that low vitamin D serum level, which is highly prevalent worldwide, could be a 'new' risk factor for many chronic diseases including cancer, and for all-cause mortality. A meta-analysis in healthy subjects suggested that current doses of vitamin D supplements could be associated with decrease in total mortality rates. However, these associations are insufficient to establish causality between vitamin D and all-cause mortality. Furthermore, long-term health effects of high doses of vitamin D, that is, prolonged supplementation and association with different baseline vitamin D levels, remain to be investigated. Several trials are ongoing but population-based, placebo-controlled randomized trials with total mortality as the main endpoint should be planned to confirm a real beneficial effect of vitamin D for non-skeletal diseases and to prove causality.
Collapse
|
8
|
Tieu EW, Tang EKY, Chen J, Li W, Nguyen MN, Janjetovic Z, Slominski A, Tuckey RC. Rat CYP24A1 acts on 20-hydroxyvitamin D(3) producing hydroxylated products with increased biological activity. Biochem Pharmacol 2012; 84:1696-704. [PMID: 23041230 DOI: 10.1016/j.bcp.2012.09.032] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 09/27/2012] [Accepted: 09/28/2012] [Indexed: 11/18/2022]
Abstract
20-Hydroxyvitamin D(3) (20(OH)D(3)), the major product of CYP11A1 action on vitamin D(3), is biologically active and is produced in vivo. As well as potentially having important physiological actions, it is of interest as a therapeutic agent due to its lack of calcemic activity. In the current study we have examined the ability of CYP24A1, the enzyme that inactivates 1,25-dihydroxyvitamin D(3) (1,25(OH)(2)D(3)), to metabolize 20(OH)D(3). Rat CYP24A1 was expressed in Escherichia coli, purified by Ni-affinity chromatography and assayed with substrates incorporated into phospholipid vesicles which served as a model of the inner mitochondrial membrane. In this system CYP24A1 metabolized 1,25(OH)(2)D(3) with a catalytic efficiency 1.4-fold higher than that seen for 25-hydroxyvitamin D(3) (25(OH)D(3)). CYP24A1 hydroxylated 20(OH)D(3) to several dihydroxy-derivatives with the major two identified by NMR as 20,24-dihydroxyvitamin D(3) (20,24(OH)(2)D(3)) and 20,25-dihydroxyvitamin D(3) (20,25(OH)(2)D(3)). The catalytic efficiency of CYP24A1 for 20(OH)D(3) metabolism was more than 10-fold lower than for either 25(OH)D(3) or 1,25(OH)(2)D(3) and no secondary metabolites were produced. The two major products, 20,24(OH)(2)D(3) and 20,25(OH)(2)D(3), caused significantly greater inhibition of colony formation by SKMEL-188 melanoma cells than either 1,25(OH)(2)D(3) or the parent 20(OH)D(3), showing that CYP24A1 plays an activating, rather than an inactivating role on 20(OH)D(3).
Collapse
Affiliation(s)
- Elaine W Tieu
- School of Chemistry and Biochemistry, The University of Western Australia, Crawley, WA, Australia
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Szyszka P, Zmijewski MA, Slominski AT. New vitamin D analogs as potential therapeutics in melanoma. Expert Rev Anticancer Ther 2012; 12:585-99. [PMID: 22594894 DOI: 10.1586/era.12.40] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Extensive evidence shows that the active form of vitamin D3--1α,25-dihydroxyvitamin D3--plays an important role in cancer prevention, has tumorostatic activity and may potentially be used in therapy for melanoma. Vitamin D3 and its analogs (secosteroids) exert multiple effects on cancer cells, including inhibition of cell growth and induction of differentiation. Activity of secosteroids depends on multiple cellular factors, including expression of the vitamin D receptor. Despite its endogenous origin, the key drawback for the use of pharmacologically effective doses of 1α,25-dihydroxyvitamin D3 is its hypercalcemic effect leading to profound toxicity. The solution may lie in properties of vitamin D3 analogs with modified side chains, which demonstrate low calcemic activity but conserve the anti-tumor properties. Noncalcemic vitamin D compounds were found to be potent in multiple studies that mandate further clinical testing. Finally, recent studies revealed alternative metabolic pathways for secosteroids and new targets in the cells, which opens up new therapeutic possibilities.
Collapse
Affiliation(s)
- Paulina Szyszka
- Department of Histology, Medical University of Gdansk, Gdansk, Poland
| | | | | |
Collapse
|
10
|
Brożyna AA, Jóźwicki W, Janjetovic Z, Slominski AT. Expression of the vitamin D-activating enzyme 1α-hydroxylase (CYP27B1) decreases during melanoma progression. Hum Pathol 2012; 44:374-87. [PMID: 22995334 DOI: 10.1016/j.humpath.2012.03.031] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 03/22/2012] [Accepted: 03/28/2012] [Indexed: 11/19/2022]
Abstract
1α-Hydroxylase (CYP27B1), the enzyme responsible for the synthesis of the biologically active form of vitamin D (1,25(OH)(2)D(3)), is expressed in the skin. To assess the correlation between progression of melanocytic tumors and CYP27B1, we analyzed its expression in 29 benign nevi, 75 primary cutaneous melanomas, 40 metastases, and 4 re-excision and 6 normal skin biopsies. Immunoreactivity for CYP27B1 was significantly lower in the vertical growth phase and metastatic melanomas (0.6 and 0.5 arbitrary units, respectively) in comparison with nevi and radial growth phase tumors (1.2 and 1.1 arbitrary units, respectively); and expression was reduced in more advanced lesions (Clark levels III-V, Breslow thickness ≥2.1 mm; 0.8 and 0.7 arbitrary units, respectively). There was an inverse correlation between CYP27B1 and Ki-67 expression. Furthermore, CYP27B1 expression was reduced in primary melanomas that created metastases in comparison with non-metastasizing melanomas. Reduced CYP27B1 expression in radial growth phase was related to shorter overall survival (810 versus 982 versus 1151 days in melanomas with absent, low, and high CYP27B1 immunoreactivity), and low CYP27B1 expression in radial growth phase and vertical growth phase was related to shorter disease-free survival (114 versus 339 versus 737 days and 129 versus 307 versus 737 days, respectively, in melanomas with absent, low, and high CYP27B1). Also, CYP27B1 expression was inversely related to melanin in melanoma cells in vivo and melanoma cells cultured in vitro. Thus, reduction of CYP27B1 correlates with melanoma phenotype and behavior, and its lack affects the survival of melanoma patients, indicating a role in the pathogenesis and progression of this cancer.
Collapse
Affiliation(s)
- Anna A Brożyna
- Department of Tumor Pathology and Pathomorphology, Oncology Centre-Prof. Franciszek Łukaszczyk Memorial Hospital, The Ludwik Rydygier Collegium Medicum, Nicolaus Copernicus University, 85-796 Bydgoszcz, Poland
| | | | | | | |
Collapse
|
11
|
Slominski AT, Janjetovic Z, Kim TK, Wright AC, Grese LN, Riney SJ, Nguyen MN, Tuckey RC. Novel vitamin D hydroxyderivatives inhibit melanoma growth and show differential effects on normal melanocytes. Anticancer Res 2012; 32:3733-3742. [PMID: 22993313 PMCID: PMC3458587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND/AIMS To test the activity of novel hydroxyvitamin D(3) analogs (20(OH)D(3), 20,23(OH)(2)D and 1,20(OH)(2)D(3)) on normal and malignant melanocytes in comparison to 1,25(OH)(2)D(3). MATERIALS AND METHODS Human epidermal melanocytes and human and hamster melanoma cells were used to measure effects on proliferation and colony formation in monolayer and soft agar. Cell morphology and melanogenesis were also analyzed. QPCR was used to measure gene expression. RESULTS Novel secosteroids inhibited proliferation and colony formation by melanoma cells in a similar fashion to 1,25(OH)(2)D(3), having no effect on melanogenesis. These effects were accompanied by ligand-induced translocation of VDR to the nucleus. In normal melanocytes 1α-hydroxyderivatives (1,25(OH)(2)D(3) and 1,20(OH)(2)D(3)) had stronger anti-proliferative effects than 20(OH)D(3) and 20,23(OH)(2)D(3), and inhibited dendrite formation. The cells tested expressed genes encoding VDR and enzymes that activate or inactivate vitamin D(3). CONCLUSION Novel secosteroids show potent anti-melanoma activity in vitro with 20(OH)D(3) and 20,23(OH)(2)D(3) being excellent candidates for pre-clinical testing.
Collapse
Affiliation(s)
- Andrzej T Slominski
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN, USA.
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Janjetovic Z, Brozyna AA, Tuckey RC, Kim TK, Nguyen MN, Jozwicki W, Pfeffer SR, Pfeffer LM, Slominski AT. High basal NF-κB activity in nonpigmented melanoma cells is associated with an enhanced sensitivity to vitamin D3 derivatives. Br J Cancer 2011; 105:1874-84. [PMID: 22095230 PMCID: PMC3251881 DOI: 10.1038/bjc.2011.458] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background: Melanoma is highly resistant to current modalities of therapy, with the extent of pigmentation playing an important role in therapeutic resistance. Nuclear factor-κB (NF-κB) is constitutively activated in melanoma and can serve as a molecular target for cancer therapy and steroid/secosteroid action. Methods: Cultured melanoma cells were used for mechanistic studies on NF-κB activity, utilising immunofluorescence, western blotting, EMSA, ELISA, gene reporter, and estimated DNA synthesis assays. Formalin-fixed, paraffin-embedded specimens from melanoma patients were used for immunocytochemical analysis of NF-κB activity in situ. Results: Novel 20-hydroxyvitamin (20(OH)D3) and classical 1α,25-dihydroxyvitamin D3 (1,25(OH)2D3) secosteroids inhibited melanoma cell proliferation. Active forms of vitamin D were found to inhibit NF-κB activity in nonpigmented cells, while having no effect on pigmented cells. Treatment of nonpigmented cells with vitamin D3 derivatives inhibited NF-κB DNA binding and NF-κB-dependent reporter assays, as well as inhibited the nuclear translocation of the p65 NF-κB subunit and its accumulation in the cytoplasm. Moreover, analysis of biopsies of melanoma patients showed that nonpigmented and slightly pigmented melanomas displayed higher nuclear NF-κB p65 expression than highly pigmented melanomas. Conclusion: Classical 1,25(OH)2D3 and novel 20(OH)D3 hydroxyderivatives of vitamin D3 can target NF-κB and regulate melanoma progression in nonpigmented melanoma cells. Melanin pigmentation is associated with the resistance of melanomas to 20(OH)D3 and 1,25(OH)2D3 treatment.
Collapse
Affiliation(s)
- Z Janjetovic
- Department of Pathology and Laboratory Medicine, Center for Cancer Research, University of Tennessee Health Science Center, 930 Madison Avenue, Memphis, TN 38163, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Linos K, Slominski A, Ross JS, Carlson JA. Melanoma update: diagnostic and prognostic factors that can effectively shape and personalize management. Biomark Med 2011; 5:333-60. [PMID: 21657842 DOI: 10.2217/bmm.11.39] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Routine light microscopy remains a powerful tool to diagnose, stage and prognose melanoma. Although it is very economical and efficient, it requires a significant level of expertise and, in difficult cases the final diagnosis is affected by subjective interpretation. Fortunately, new insights into the genomic aberrations characteristic of melanoma, coupled with ancillary studies, are further refining evaluation and management allowing for more confident diagnosis, more accurate staging and the selection of targeted therapy. In this article, we review the standard of care and new updates including four probe FISH, the 2009 American Joint Commission on Cancer staging of melanoma and mutant testing of melanoma, which will be crucial for targeted therapy of metastatic melanoma.
Collapse
|