Repurposing of drugs as STAT3 inhibitors for cancer therapy
Pathum S Thilakasiri1, Rhynelle S Dmello1, Tracy L Nero2
1Cancer and Inflammation Program, Olivia Newton-John Cancer Research Institute, School of Cancer Medicine, La Trobe University, Heidelberg, Vic., Australia.
Abstract:
Drug repurposing is a valuable approach in delivering new cancer therapeutics rapidly into the clinic. Existing safety and patient tolerability data for drugs already in clinical use represent an untapped resource in terms of identifying therapeutic agents for off-label protein targets. The multicellular effects of STAT3 mediated by a range of various upstream signaling pathways make it an attractive therapeutic target with utility in a range of diseases including cancer, and has led to the development of a variety of STAT3 inhibitors. Moreover, heightened STAT3 transcriptional activation in tumor cells and within the cells of the tumor microenvironment contribute to disease progression. Consequently, there are many STAT3 inhibitors in preclinical development or under evaluation in clinical trials for their therapeutic efficacy predominantly in inflammatory diseases and cancer. Despite these advances, many challenges remain in ultimately providing STAT3 inhibitors to patients as cancer treatments, highlighting the need not only for a better understanding of the mechanisms associated with STAT3 activation, but also how various pharmaceutical agents suppress STAT3 activity in various cancers. In this review we discuss the importance of STAT3-dependent functions in cancer, review the status of compounds designed as direct-acting STAT3 inhibitors, and describe some of the strategies for repurposing of drugs as STAT3 inhibitors for cancer therapy.
Insights
Drug repurposing offers a fast track for new cancer treatments. This review explores using existing drugs to target Signal Transducer and Activator of Transcription 3 (STAT3) for improved cancer therapy.
Area of Science:
- Oncology
- Pharmacology
- Molecular Biology
Background:
- Signal Transducer and Activator of Transcription 3 (STAT3) signaling is crucial in cancer progression.
- STAT3 activation in tumor cells and the microenvironment drives disease.
- STAT3 inhibitors are under investigation for cancer and inflammatory diseases.
Purpose of the Study:
- To review the role of STAT3 in cancer.
- To discuss direct STAT3 inhibitors.
- To explore drug repurposing strategies for STAT3 inhibition in cancer therapy.
Main Methods:
- Literature review of STAT3 inhibitors.
- Analysis of drug repurposing for STAT3 targets.
- Discussion of STAT3 activation mechanisms.
Main Results:
- STAT3 plays a significant role in various cancers.
- Numerous direct STAT3 inhibitors are in development.
- Drug repurposing presents a viable strategy for novel STAT3 inhibitors.
Conclusions:
- STAT3 is a key therapeutic target in oncology.
- Further research into STAT3 mechanisms and drug repurposing is needed.
- Repurposed drugs could accelerate the development of novel cancer treatments.
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