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Nishie T, Komaru A, Shiroguchi S, Yamaizumi T, Ono Y, Motomochi A, Tooyama I, Fujioka Y, Sakai N, Higaki S, Takada T. Nonylphenol reduced the number of haploids in in vitro spermatogenesis of the endangered cyprinid Gnathopogon caerulescens. Toxicol In Vitro 2023; 89:105565. [PMID: 36746343 DOI: 10.1016/j.tiv.2023.105565] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/26/2023] [Accepted: 01/30/2023] [Indexed: 02/08/2023]
Abstract
Nonylphenol (NP), an endocrine disrupting chemical, is widely used in industrial and agricultural processes, causing NP influx into aquatic environments. NP induces hormonal imbalance, and male feminization, and reduces germ cell production during spermatogenesis; however, the mechanism by which it affects spermatogenesis remains unknown. Here, we investigated the effect of NP on spermatogenesis in honmoroko (Gnathopogon caerulescens), an endangered fish endemic to Lake Biwa, Japan, using an in vitro differentiation system. We collected spermatogonia from the testes of non-spawning G. caerulescens and subjected them to suspension culture. The spermatogonia differentiated into flagellated spermatozoa in 3 weeks, regardless of the presence of NP. NP concentrations as low as 1 nM caused a decrease in the number of germ cells in a dose-dependent manner, whereas the number of somatic cells decreased only at a high concentration of 1 μM. Flow cytometric analysis revealed that the decrease in germ cell number was attributed to haploids (spermatids and spermatozoa); the number of spermatogonia and spermatocytes was not affected by NP treatment. This result is consistent with the hypothesis that NP might repress the second meiosis or induce apoptosis in haploids. This study demonstrated that the combination of in vitro germ cell differentiation and flow cytometric analysis is useful for evaluating the direct effects of NP on germ cell differentiation in endangered endemic fish.
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Affiliation(s)
- Tomomi Nishie
- Laboratory of Cell Engineering, Department of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Aika Komaru
- Laboratory of Cell Engineering, Department of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Syota Shiroguchi
- Laboratory of Cell Engineering, Department of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Takako Yamaizumi
- Laboratory of Cell Engineering, Department of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Yuriko Ono
- Laboratory of Cell Engineering, Department of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Atsuko Motomochi
- Laboratory of Cell Engineering, Department of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Ikuo Tooyama
- Molecular Neuroscience Research Center and Medical Innovation Research Center, Shiga University of Medical Science, Shiga 520-2192, Japan
| | | | - Noriyoshi Sakai
- Genetic Strains Research Center, National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
| | - Shogo Higaki
- Laboratory of Cell Engineering, Department of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Tatsuyuki Takada
- Laboratory of Cell Engineering, Department of Pharmaceutical Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan.
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Kamiya T, Hira D, Nakajima R, Shinoda K, Motomochi A, Morikochi A, Ikeda Y, Isono T, Akabane M, Ueshima S, Kakumoto M, Imai S, Morita SY, Terada T. Decreased Analgesic Effect of Tramadol in Japanese Patients with CYP2D6 Intermediate Metabolizers after Orthopedic Surgery. Biol Pharm Bull 2023; 46:907-913. [PMID: 37394642 DOI: 10.1248/bpb.b23-00030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Tramadol is metabolized by CYP2D6 to an active metabolite, which in turn acts as an analgesic. This study aimed to investigate the impact of CYP2D6 genotype on the analgesic effect of tramadol in clinical practice. A retrospective cohort study was performed in patients treated with tramadol for postoperative pain after arthroscopic surgery for rotator cuff injury during April 2017-March 2019. The impact of CYP2D6 genotypes on the analgesic effects was assessed by the numeric rating scale (NRS) pain scoring and analyzed by the Mann-Whitney U test. Stepwise multiple linear regression analysis was performed to identify predictive factors for the area under the time-NRS curve (NRS-AUC), which was calculated using the linear trapezoidal method. Among the 85 enrolled Japanese patients, the number of phenotypes with CYP2D6 normal metabolizer (NM) and intermediate metabolizer (IM) was n = 69 (81.1%) and n = 16 (18.9%), respectively. The NRS and NRS-AUC in the IM group were significantly higher than those in the NM group until Day 7 (p < 0.05). The multiple linear regression analysis indicated that the CYP2D6 polymorphism was a prediction factor of the high NRS-AUC levels in Days 0-7 (β = 9.52, 95% CI 1.30-17.7). In IM patients, the analgesic effect of tramadol was significantly reduced one week after orthopedic surgery in clinical practice. Therefore, dose escalation of tramadol or the use of alternative analgesic medications can be recommended for IM patients.
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Affiliation(s)
- Takaki Kamiya
- Department of Pharmacy, Shiga University of Medical Science Hospital
| | - Daiki Hira
- Department of Pharmacy, Shiga University of Medical Science Hospital
- College of Pharmaceutical Sciences, Ritsumeikan University
- Department of Clinical Pharmacology and Therapeutics, Kyoto University Hospital
| | - Ryo Nakajima
- Department of Orthopedic Surgery, Shiga University of Medical Science
- Department of Orthopedic Surgery, Japan Community Health Care Organization Shiga Hospital
| | - Kazuha Shinoda
- College of Pharmaceutical Sciences, Ritsumeikan University
| | - Atsuko Motomochi
- Department of Pharmacy, Shiga University of Medical Science Hospital
| | - Aya Morikochi
- Department of Pharmacy, Shiga University of Medical Science Hospital
| | - Yoshito Ikeda
- Department of Pharmacy, Shiga University of Medical Science Hospital
| | - Tetsuichiro Isono
- Department of Pharmacy, Shiga University of Medical Science Hospital
| | - Michiya Akabane
- Department of Pharmacy, Shiga University of Medical Science Hospital
| | | | - Mikio Kakumoto
- College of Pharmaceutical Sciences, Ritsumeikan University
| | - Shinji Imai
- Department of Orthopedic Surgery, Shiga University of Medical Science
| | - Shin-Ya Morita
- Department of Pharmacy, Shiga University of Medical Science Hospital
| | - Tomohiro Terada
- Department of Pharmacy, Shiga University of Medical Science Hospital
- Department of Clinical Pharmacology and Therapeutics, Kyoto University Hospital
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