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Hanamura T, Ohno K, Houkibara S, Murasawa H, Nakamura T, Watanabe H, Kaizuka M, Sawano S, Koyama H, Ito KI. Abstract P4-01-23: Clinical significance of serum PSA in breast cancer patients. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p4-01-23] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Recent preclinical data suggest that estrogen receptor (ER) positive breast cancer (BC), may switch from dependence on ER to androgen receptor (AR) as possible mechanism of resistance to ER-targeted endocrine therapy. AR dependency has also been suggested in a subset of ER-, AR+ BC. Based on these findings, clinical trials testing AR-targeting therapies in BC have been conducted. However, predictive markers for response to this type of therapies remain to be elucidated. PSA is the product of an androgen-responsive gene produced also in BC, and serum PSA (sPSA) could be detected in BC patients by a highly sensitive assay. Hypothesis:If sPSA reflects AR dependency of BC, it might be useful as a predictive marker for response to AR-targeting therapy. Methods:In this study, we investigated whether tumor-derived sPSA could be detected in BC patient, and if it might reflect tumor biology. In metastatic breast cancer (MBC) patients continuously observed, sPSA was evaluated monthly by CLEIA method (detection sensitivity ≥ 3 ng/L). Similarly, sPSA was evaluated at arbitrary points in non-BC control and point analysis BC group enrolled regardless of clinicopathological factor or treatment history. In the observational group, the relationship between change in disease condition and sPSA was analyzed. Next, correlations between sPSA and various clinicopathological factors were analyzed using combined data of point analysis group and initial sPSA value of observation group. In this study, 146 BC (26 observation group and 120 point analysis group) and 99 control were enrolled. Results: In the observational analysis, 5 cases showed sPSA change well reflected the disease condition, but not in other 5 cases. In remaining 16 cases, sPSA was undetectable or the observation period was insufficient (<4m). In the point analysis, sPSA was detected in 28.3% and 28.1% in control and BC respectively. Although in pre-menopausal state, there was no significant difference in sPSA between control and BC (4.4 ± 6.98 ng/L vs 3.7 ± 5.5 ng/L), in post-menopausal state, sPSA was significantly higher in BC compared with control (0.7 ± 2.5 ng/L vs 64.6 ± 357.4 ng/L; P<0.05). In analysis limited to post-menopausal BC, sPSA was higher in MBC (de-novo stage 4 and recurrence) compared with non-MBC (Stage0-3) (106.0 ± 457.2 ng/L vs 2.1 ± 8.5 ng/L; P<0.05). Similarly, sPSA was higher in low ki-67 (<20%) cases compared with high ki-67 (≥20%) (105.7 ± 510.8 ng/L vs 30.5 ± 173.7 ng/L; p<0.05). There was no significant difference in sPSA due to histological type, ER or HER2 status and nuclear grade. In correlation analysis of quantitative data limited to post-menopausal MBC, sPSA was negatively correlated with Ki-67 (rS=-0.35, p<0.05) and positively correlated with treatment line of previous endocrine therapy (rS=0.27, p<0.05). It did not correlate with age, disease free interval, number of metastatic organs or treatment line of previous chemotherapy. Conclusion:Our data suggest that sPSA may be tumor-derived at least in post-menopausal MBC and may reflect some kind of tumor biological properties. These all findings justify further studies of the efficacy of sPSA as a predictive marker in AR-targeted therapy.
Citation Format: Hanamura T, Ohno K, Houkibara S, Murasawa H, Nakamura T, Watanabe H, Kaizuka M, Sawano S, Koyama H, Ito K-i. Clinical significance of serum PSA in breast cancer patients [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P4-01-23.
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Affiliation(s)
- T Hanamura
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - K Ohno
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - S Houkibara
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - H Murasawa
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - T Nakamura
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - H Watanabe
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - M Kaizuka
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - S Sawano
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - H Koyama
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - K-i Ito
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
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Hiramatsu M, Murasawa H, Nabeshima T, Kameyama T. Effects of U-50,488H on scopolamine-, mecamylamine- and dizocilpine-induced learning and memory impairment in rats. J Pharmacol Exp Ther 1998; 284:858-67. [PMID: 9495843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The role of kappa opioid receptor agonists in learning and memory is controversial. In the present study, the effects of U-50,488H on scopolamine-, mecamylamine- and dizocilpine-induced learning and memory impairments in rats were investigated. Scopolamine (3.3 mumol/kg s.c.), a muscarinic cholinergic antagonist, and mecamylamine (40 mumol/kg s.c.), a nicotinic cholinergic antagonist, significantly impaired learning and memory in rats in a step-through type passive avoidance test. Administration of U-50,488H (0.17 or 0.51 mumol/kg s.c.) 25 min before the acquisition trial reversed the impairment of learning and memory induced by scopolamine and mecamylamine. Although low doses of scopolamine (0.17 mumol/kg) and mecamylamine (12 mumol/kg) had no effect, concurrent administration of both antagonists induced impairment of learning and memory. Scopolamine significantly increased acetylcholine release in the hippocampus as determined by in vivo brain microdialysis. On the other hand, mecamylamine significantly decreased acetylcholine release. U-50,488H completely blocked the decrease in acetylcholine release induced by mecamylamine, whereas it only partially blocked the increase of acetylcholine induced by scopolamine. On the other hand, an endogenous kappa opioid receptor agonist, dynorphin A (1-13), did not block the increase in acetylcholine release induced by scopolamine. The antagonistic effect of U-50,488H was abolished by pretreatment with nor-binaltorphimine (4.9 nmol/rat i.c.v.), a selective kappa opioid receptor antagonist. U-50,488H did not affect the impairment of learning and memory induced by the blockade of NMDA receptors by dizocilpine ((+)-MK-801). These results suggest that U-50,488H reverses the impairment of learning and memory induced by the blockade of cholinergic transmission and abolishes the decrease of acetylcholine release induced by mecamylamine via the kappa receptor-mediated opioid neuronal system.
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Affiliation(s)
- M Hiramatsu
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Meijo University, Nagoya, Japan
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