|
1
|
Zhang X, Luo F, Li J, Wan J, Zhang L, Li H, Chen A, Chen J, Cai T, He X, Lisse TS, Zhao H. DNA damage-inducible transcript 4 is an innate guardian for human squamous cell carcinoma and an molecular vector for anti-carcinoma effect of 1,25(OH) 2 D 3. Exp Dermatol 2018; 28:45-52. [PMID: 30372793 DOI: 10.1111/exd.13815] [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: 01/15/2018] [Accepted: 10/25/2018] [Indexed: 01/12/2023]
Abstract
Cutaneous squamous cell carcinoma (SCC) is one of the most common non-melanoma skin cancers worldwide. While its exact tumorigenesis mechanisms is far from well-established and less satisfied therapeutic strategy can be clinically used nowadays. In this study, we intended to investigate the role of DNA damage-inducible transcript 4 (DDIT4) in human SCC. Firstly, we identified DDIT4 is significantly suppressed in human SCC tissue and cultured A431 cell line, and reduced DDIT4 accelerates keratinocytes proliferation but impedes the autophagy flux through mTORC1 pathway by affecting the downstream S6 Kinase1, 4E-BP1, Beclin1 and LC3 II/I. While 1,25(OH)2 D3 enhanced DDIT4 expression and activated autophagy and inhibit mTORC1 to take the effect of anti-proliferation and activating autophagy. Further, formation of direct vitamin D receptor (VDR)-DDIT4 transcription complex was verified by ChIP-qPCR, which showed the molecular mechanism of how 1,25(OH)2 D3 promotes DDIT4 transcription. Thirdly, xenograft tumor-bearing mice model treated by gradient concentrations of 1,25(OH)2 D3 revealed the obvious anti-carcinoma effect of 1,25(OH)2 D3 in vivo and DDIT4 acted the molecular vector of 1,25(OH)2 D3 through mTORC1. Lastly, elevated DDIT4 expression was verified in human actinic keratoses tissue, and chronic long-term ultraviolet (UV) irradiation on mouse disclosed UV could promote DDIT4 expression inside epidermis. Conclusively, our research suggested a novel molecular mechanism about the human SCC tumorigenesis and the pharmacological mechanism about how 1,25(OH)2 D3 take its anti-carcinoma role on human SCC, as well as a striking paradoxes that how UV irradiation plays the tumorigenesis effect but synchronously take a protective role in the early stage of SCC carcinogenesis.
Collapse
Affiliation(s)
- Xiaojiao Zhang
- Department of Dermatology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Fuling Luo
- Department of Pharmacy, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jing Li
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing, China
| | - Jingyuan Wan
- Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing, China
| | - Li Zhang
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China
| | - Hongzhong Li
- Molecular Oncology and Epigenetics Laboratory, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Aijun Chen
- Department of Dermatology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Jin Chen
- Department of Dermatology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Tao Cai
- Department of Dermatology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xian He
- Department of Allergy, Chengdu First People's Hospital, Chengdu, China
| | - Thomas S Lisse
- Cox Science Center, University of Miami, Coral Gables, Florida
| | - Hengguang Zhao
- Department of Dermatology, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| |
Collapse
|
|
2
|
Abstract
Vitamin D is critical in mineral homeostasis and skeletal health and plays a regulatory role in nonskeletal tissues. Vitamin D deficiency is associated with chronic inflammatory diseases, including diabetes and obesity, both strong risk factors for cardiovascular diseases (CVDs). CVDs, including coronary artery disease, myocardial infarction, hypertrophy, cardiomyopathy, cardiac fibrosis, heart failure, aneurysm, peripheral arterial disease, hypertension, and atherosclerosis, are major causes of morbidity and mortality. The association of these diseases with vitamin D deficiency and improvement with vitamin D supplementation suggest its therapeutic benefit. The authors review the findings on the association of vitamin D deficiency and CVDs.
Collapse
Affiliation(s)
- Vikrant Rai
- Department of Clinical and Translational Science, Creighton University School of Medicine, CRISS II Room 510, 2500 California Plaza, Omaha, NE 68178, USA
| | - Devendra K Agrawal
- Department of Clinical and Translational Science, Creighton University School of Medicine, CRISS II Room 510, 2500 California Plaza, Omaha, NE 68178, USA.
| |
Collapse
|