STAT3 signaling pathway in drug-resistant bladder cancer cell line

T Lei; S Zhou; Q Meng; M Zhang

doi:10.23812/19-68-A

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Asia Pacific Academy of Science Pte. Ltd. (APACSCI) specializes in international journal publishing. APACSCI adopts the open access publishing model and provides an important communication bridge for academic groups whose interest fields include engineering, technology, medicine, computer, mathematics, agriculture and forestry, and environment.

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Macrophages in the pathogenesis of psoriasis and anti-psoriatic nanotherapies

Psoriasis is a common, chronic, and inflammatory skin disease. Macrophages account for about 61.3% of the inflammatory cells infiltrating psoriatic lesions. Modulating macrophage polarization, inhibiting their infiltration, and targeting the secretion of inflammatory factors and associated inflammatory pathways by these cells can alleviate psoriasis symptoms and inflammation. Moreover, nanomaterials as novel drug carriers, offer unique advantages such as large surface area, easy modification, high biocompatibility, good biodegradability, enhanced systemic adsorption, etc. Nanomaterials have great potential for efficient drug delivery and release, as well as improving therapeutic efficacy while reducing adverse effects. By systematically addressing the role of macrophages in psoriasis pathogenesis and the potential of nanomaterials in treating psoriasis through modulating macrophages, this review enhances our understanding of the disease mechanism and holds promise for novel therapeutic breakthroughs and advancements in the future treatment of psoriasis.

STAT3 signaling pathway in drug-resistant bladder cancer cell line

T Lei, S Zhou, Q Meng, M Zhang

Article ID: 4593
Vol 33, Issue 5, 2019

DOI: https://doi.org/10.23812/19-68-A

Received: 9 March 2019; Accepted: 9 March 2019; Available online: 8 November 2019; Issue release: 8 November 2019

Abstract

STAT3 signaling pathway is related to the proliferation, apoptosis and metastasis of tumor cells. The relationship between STAT3 and drug resistance is still unknown. We studied the inhibitors in STAT3 pathway and its downstream molecules to analyze the unique effects in drug-resistant bladder cancer cells. qRT-PCR and Western blot were implemented to study the expression level of JAK2, STAT3, p-STAT3, MMP2 and Cyclin D1 in Pumc-91 and Pumc-91/ADM cell lines, respectively. The effects of AG490 on the expression of STAT3, p-STAT3, MMP2 and Cyclin D1 in Pumc-91 were evaluated using qRT-PCR and Western blot. Pumc-91/ADM cells were treated with AG490. CCK-8 and wound healing assay were used to detect the cell proliferation and metastasis. Compared to Pumc-91, an obvious decrease of JAK2, p-STAT3 and increase of MMP2 were shown in Pumc-91/ADM cell line. After inhibition of STAT3 signaling pathway, the mRNA and protein levels of STAT3, p-STAT3, MMP2 and Cyclin D1 obviously decreased in the test group. The proliferation and migration of Pumc-91/ADM were suppressed by inhibiting of STAT3. STAT3 pathway regulated the proliferation and migration of bladder cancer drug-resistant cells by modulating the expression of Cyclin D1 and MMP2.

Keywords

bladder cance;drug resistance bladder cancer;signal transducer and activator of transcription 3(STAT3) AG490;signaling pathway

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Medical Genetics, University of Torino Medical School, Italy

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Department of Biomedical, Surgical and Dental Sciences, University of Milan, Italy

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2025-02-01

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