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To date, there have been no treatments developed to ameliorate non-melanoma skin cancer induced by long-term exposure to ultraviolet A (UVA) irradiation. In this study, we examined the effects of tranexamic acid (trans-4-aminomethyl cyclohexanecarboxylic acid) on long-term UVA-induced skin cancer. We exposed the dorsal skin of male hairless mice to UVA at a dose of 110 kJ/m using an FL20SBLB-A lamp three times weekly for 15 weeks after application of 7,12-dimethylbenz [a] anthracene (DMBA). During the experimental period, the mice were administered tranexamic acid (750 mg/kg/day) three times weekly. We found that cancer development was ameliorated by administration of tranexamic acid. Furthermore, tranexamic acid treatment was observed to suppress increases in the plasma levels of matrix metalloproteinase-9 and interleukin (IL)-6, and skin expression of plasmin, C-C chemokine2, macrophages, signal transducer and activator of transcription (STAT)3, cyclin D, and vascular endothelial growth factor (VEGF)-A that occurred in mice subjected to long-term UVA irradiation. These results indicated that the non-melanoma skin cancer induced by DMBA+UVA long-term irradiation is ameliorated by tranexamic acid through regulation of the plasmin/macrophage/IL-6/STAT3/cyclin D signal transmission pathway. In addition, this ameliorative effect against skin cancer may be mediated via inhibition of the IL-6-induced expression of VEGF-A. This article is protected by copyright. All rights reserved.
This article was published in the following journal.
Name: Photochemistry and photobiology
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Soft tissue tumors or cancer arising from the mucosal surfaces of the LIP; oral cavity; PHARYNX; LARYNX; and cervical esophagus. Other sites included are the NOSE and PARANASAL SINUSES; SALIVARY GLANDS; THYROID GLAND and PARATHYROID GLANDS; and MELANOMA and non-melanoma skin cancers of the head and neck. (from Holland et al., Cancer Medicine, 4th ed, p1651)
Experimentally induced tumor that produces MELANIN in animals to provide a model for studying human MELANOMA.
An unpigmented malignant melanoma. It is an anaplastic melanoma consisting of cells derived from melanoblasts but not forming melanin. (Dorland, 27th ed; Stedman, 25th ed)
A cellular subtype of malignant melanoma. It is a pigmented lesion composed of melanocytes occurring on sun-exposed skin, usually the face and neck. The melanocytes are commonly multinucleated with a "starburst" appearance. It is considered by many to be the in situ phase of lentigo maligna melanoma.
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Bladder Cancer Brain Cancer Breast Cancer Cancer Cervical Cancer Colorectal Head & Neck Cancers Hodgkin Lymphoma Leukemia Lung Cancer Melanoma Myeloma Ovarian Cancer Pancreatic Cancer ...
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