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Utsugi S, Ogihara K, Naya Y, Sunden Y, Nakamoto Y, Okamoto Y. Expression of L-type amino acid transporter 1 in canine and feline intracranial tumors. J Vet Med Sci 2022; 84:1111-1117. [PMID: 35753782 PMCID: PMC9412071 DOI: 10.1292/jvms.21-0646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
L-type amino acid transporter 1 (LAT1) is upregulated in various malignant tumors in humans. LAT1 expression correlates with the grade of cancer and prognosis. LAT1 is responsible for the supply of many essential amino acids to cancer cells. Inhibition of LAT1 reduces the amino acids that enter the cell and inhibits cancer cell growth. Therefore, novel anticancer drugs targeting LAT1 have attracted much attention in recent years. In this study, to explore the applicability of using LAT1 expression in intracranial tumors as a prognostic factor and therapeutic target, we investigated the expression of LAT1 in surgically resected primary and secondary intracranial tumor tissues from dogs and cats. Immunohistochemical analysis of LAT1 was performed on intracranial tumor tissue from 14 dogs and 3 cats. Primary intracranial tumors were seen in 10 dogs and included meningiomas, histiocytic sarcomas, pituitary tumors, and gliomas, and 9 out of 10 cases were positive for LAT1. Primary intracranial tumors were seen in 2 cats and included meningioma and lymphoma; both cases were positive for LAT1. Secondary intracranial tumors were positive for LAT1 in 3 out of 4 cases in dogs and 1 out of 1 in cats. Since the majority of intracranial tumors in dogs and cats were positive for LAT1, immunostaining for LAT1 is expected to be a prognostic indicator and therapeutic target in the future.
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Affiliation(s)
- Shinichi Utsugi
- The United Graduate School of Veterinary Science, Yamaguchi University.,Department of Neurology, Saitama Animal Medical Center
| | | | - Yuko Naya
- Laboratory of Veterinary Pathology, Azabu University
| | - Yuji Sunden
- Laboratory of Veterinary Pathology, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
| | - Yuya Nakamoto
- Neuro Vets Animal Neurology Clinic.,Laboratory of Veterinary Surgery, Department of Graduate School of Life and Environmental Sciences, Osaka Prefecture University
| | - Yoshiharu Okamoto
- Laboratory of Veterinary Surgery, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University
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Malinowski D, Grzegółkowski P, Piotrowska K, Słojewski M, Droździk M. Membrane Transporters and Carriers in Human Seminal Vesicles. J Clin Med 2022; 11:jcm11082213. [PMID: 35456310 PMCID: PMC9029209 DOI: 10.3390/jcm11082213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/21/2022] [Accepted: 04/13/2022] [Indexed: 11/16/2022] Open
Abstract
Seminal vesicles play an important role in the male reproductive system, producing seminal fluid and thus adequate environment for sperm. However, mechanisms underlying secretory functions of the seminal vesicles’ epithelium have not been defined yet. The aim of the present study was to characterize expression and immunolocalization of selected membrane transporters and carriers in the seminal vesicles. The study included biopsy specimens collected from non-affected parts of seminal vesicles from 53 patients of Caucasian origin subjected for prostatectomy. RT-PCR was used to define expression of 15 genes coding for ABC-family and 37 genes encoding 37 SLC-family transporters/carriers. Immunohistochemistry was used to define localization of 6 transporters. In the seminal vesicles, the following membrane transporters and carriers were defined: ABCA1, ABCB1, ABCB5, ABCB6, ABCC1, ABCC2, ABCC3, ABCC4, ABCC5, ABCC6, ABCG2, SLC01C1, SLC02B1, SLC04A1, SLC04C1, SLC10A1, SLC15A1, SLC15A2, SLC16A1, SLC16A3, SLC19A1, SLC22A1, SLC22A3, SLC22A11, SLC22A18, SLC22A4, SLC22A5, SLC28A1, SLC2A9, SLC33A1, SLC47A1, SLC47A2, SLC51A, SLC51B, SLC7A5, SLC7A6. Age-dependent expression was evidenced for ABCB1, ABCG2, SLC04C1, SLC15A1, SLC16A1, SLC22A11, SLC22A18, SLC47A1 and SLC47A2. ABCG2, P-gp, MRP1, MRP3, MCT1 and LAT1 were localized in the apical membrane and P-gp in the basolateral membrane of the seminal vesicle epithelium. The expression of the membrane transporters and carriers in the seminal vesicle epithelium confirms its secretory and barrier functions.
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Affiliation(s)
- Damian Malinowski
- Department of Pharmacokinetics and Therapeutic Drug Monitoring, Pomeranian Medical University, 70-111 Szczecin, Poland;
| | - Paweł Grzegółkowski
- Department of Urology, Pomeranian Medical University, 70-111 Szczecin, Poland; (P.G.); (M.S.)
| | - Katarzyna Piotrowska
- Department of Physiology, Pomeranian Medical University, 70-111 Szczecin, Poland;
| | - Marcin Słojewski
- Department of Urology, Pomeranian Medical University, 70-111 Szczecin, Poland; (P.G.); (M.S.)
| | - Marek Droździk
- Department of Experimental and Clinical Pharmacology, Pomeranian Medical University, 70-111 Szczecin, Poland
- Correspondence: ; Tel.: +48-91-4661589; Fax: +48-91-4661600
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Ma XP, Gao XQ. The effect of Ureaplasma urealyticum on the level of P34H expression, the activity of hyaluronidase, and DNA fragmentation in human spermatozoa. Am J Reprod Immunol 2016; 77. [DOI: 10.1111/aji.12600] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 10/16/2016] [Indexed: 11/30/2022] Open
Affiliation(s)
- Xiao-ping Ma
- Department of Histology and Embryology; Guizhou Medical university; Guizhou China
- Department of Histology and Embryology; Zunyi Medical and Pharmaceutical College; Guizhou China
| | - Xiao-qin Gao
- Department of Histology and Embryology; Zunyi Medical and Pharmaceutical College; Guizhou China
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Utsugi S, Azuma K, Osaki T, Murahata Y, Tsuka T, Ito N, Imagawa T, Okamoto Y. Analysis of plasma free amino acid profiles in canine brain tumors. Biomed Rep 2016; 6:195-200. [PMID: 28357072 DOI: 10.3892/br.2016.825] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 10/05/2016] [Indexed: 11/05/2022] Open
Abstract
Canine brain tumors are best diagnosed using magnetic resonance imaging (MRI). However, opportunities of MRI examination are restricted due to its limited availability in veterinary facilities; thus, numerous canine brain tumors are diagnosed at an advanced stage. Therefore, development of a noninvasive diagnostic biomarker is required for the early detection of brain tumors. In the present study, plasma free amino acid (PFAA) profiles between dogs with and without brain tumors were compared. A total of 12 dogs with brain tumors, diagnosed based on clinical signs, and on the results of intracranial MRI and/or pathological examination were evaluated. In addition, eight dogs diagnosed with idiopathic epilepsy and 16 healthy dogs were also included. A liquid chromatography system with automated pre-column derivatization functionality was used to measure the levels of 20 amino acids. As a result, the levels of three amino acids (alanine, proline and isoleucine) were increased significantly (1.6-, 1.5- and 1.6-fold, respectively) in the plasma of dogs with brain tumors as compared with the levels in control dogs (all P<0.05). Thus, the PFAA levels of dogs with brain tumors differed from those of healthy dogs. The present study demonstrated that analysis of PFAA levels of dogs with brain tumors may serve as a useful biomarker for the early detection of canine brain tumors.
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Affiliation(s)
- Shinichi Utsugi
- Department of Clinical Veterinary Medicine, The United Graduate School of Veterinary Science, Yamaguchi University, Yamaguchi 753-8515, Japan; Department of Neurology, Japan Animal Referral Medical Center, Kawasaki, Kanagawa 213-0032, Japan
| | - Kazuo Azuma
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Osaki
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yusuke Murahata
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Takeshi Tsuka
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Norihiko Ito
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Yoshiharu Okamoto
- Department of Clinical Medicine, School of Veterinary Medicine, Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
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