Enhanced expression of organic anion transporting polypeptides (OATPs) in androgen receptor-positive prostate cancer cells: possible role of OATP1A2 in adaptive cell growth under androgen-depleted conditions
Open accessAbstract
The biological mechanisms underlying castration resistance of prostate cancer are not fully understood. In the present study, we examined the role of organic anion transporting polypeptides (OATPs) as importers of dehydroepiandrosterone sulfate (DHEAS) into cells to support growth under androgen-depleted conditions. Cell growth and mRNA expression of OATP genes were studied in human prostate cancer LNCaP and 22Rv1 cells under androgen-depleted conditions. The stimulatory effect of DHEAS on cell growth was investigated in LNCaP cells in which OATP1A2 had been silenced. Growth of both cell lines was stimulated by DHEAS and the effect was attenuated by STX64, an inhibitor of steroid sulfatase which can covert DHEAS to DHEA. OATP1A2 mRNA expression was increased most prominently among various genes tested in LNCaP cells grown in androgen-depleted medium. Similar results were obtained with 22Rv1 cells. Furthermore, the characteristics of [(3)H]DHEAS uptake by LNCaP cells were consistent with those of OATP-mediated transport. Knockdown of OATP1A2 in LNCaP cells resulted in loss of the DHEAS sensitivity of cell growth. Our results suggest that enhanced OATP1A2 expression is associated with adaptive cell growth of prostate cancer cells under androgen-depleted conditions. Thus, OATP1A2 may be a pharmacological target for prostate cancer treatment.
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Knock down of OATPs have also been shown to reduce the DHEAS-stimulated proliferation of prostate cancer cell lines.
“Knock down of OATPs have also been shown to reduce the DHEAS-stimulated proliferation of prostate cancer cell lines (Arakawa et al., 2012).”
From Intracrine androgen biosynthesis, metabolism and action revisited (2018) · cites this paper as Arakawa et al., 2012
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The Regulation of Steroid Action by Sulfation and Desulfation
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“Knock down of OATPs have also been shown to reduce the DHEAS-stimulated proliferation of prostate cancer cell lines (Arakawa et al., 2012).”
- Authors
- Arakawa, H., Nakanishi, T., Yanagihara, C., Nishimoto, T., Wakayama, T., Mizokami, A., Namiki, M., Kawai, K., & Tamai, I.
- Affiliations
- Kanazawa University (JP)
- Corresponding author
- Tamai, Ikumi
- ORCID
- Venue
- Biochemical Pharmacology
- Publisher
- Elsevier BV
- Published
- 2012-10
- Volume
- 84
- Issue
- 8
- Pages
- 1070-1077
- ISSN
- 0006-2952 (ISSN-L)
- OpenAlex
- W2036726324
- Cited by
- 63
- References
- 30
- Citations by year
- 2026: 3 · 2024: 4 · 2023: 1 · 2022: 3 · 2021: 3 · 2020: 4 · 2019: 8 · 2018: 4 · 2017: 6 · 2016: 8 · 2015: 9 · 2014: 7 · 2013: 3
- FWCI
- 3.00
- Type
- journal article
- Language
- en
- Open access
- Licence
- cc-by-nc-nd
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- Locations
- Biochemical Pharmacology (publishedVersion)
- PubMed (publishedVersion)
- Institutional Repositories DataBase (IRDB) (submittedVersion, cc-by-nc-nd)
- Kanazawa University Repository for Academic Resources (DSpace) (Kanazawa University) (submittedVersion, cc-by-nc-nd)
- Funders
- Japan Society for the Promotion of Science (23590176)
- Topics
- Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
- Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Prostate Cancer Treatment and Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Lipids, and Metabolism
- Keywords
- organic anion transporting polypeptides, OATP1A2, prostate cancer, androgen receptor, castration resistance, androgen deprivation therapy, dehydroepiandrosterone sulfate, steroid sulfatase, LNCaP cells, 22Rv1 cells, therapeutic target
- MeSH terms
- Androgen Antagonists, Cell Division, Humans, Male, Prostatic Neoplasms, Receptors, Androgen, RNA, Messenger, Sulfonic Acids, Reverse Transcriptase Polymerase Chain Reaction, Gene Expression Profiling, Organic Anion Transporters, Cell Line, Tumor
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