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Lee NR, Kwon TJ, Chung EC, Bae J, Soung SH, Tak HJ, Choi JY, Lee YE, Won Hwang N, Lee JS, Shin KJ, Lee CH, Kim K, Kim S. Combination of Lacticaseibacillus paracasei BEPC22 and Lactiplantibacillus plantarum BELP53 attenuates fat accumulation and alters the metabolome and gut microbiota in mice with high-fat diet-induced obesity. Food Funct 2024; 15:647-662. [PMID: 38099933 DOI: 10.1039/d3fo03557c] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
This study evaluated the effects of formulations with Lacticaseibacillus paracasei BEPC22 and Lactiplantibacillus plantarum BELP53 on adiposity, the alteration of microbiota, and the metabolome in high-fat diet-fed mice. The strains were selected based on their fat and glucose absorption inhibitory activities and potential metabolic interactions. The optimal ratio of the two strains in the probiotic formulation was determined based on their adipocyte differentiation inhibitory activities. Treatment of formulations with BEPC22 and BELP53 for 10 weeks decreased body weight gain at 6 weeks; it also decreased the food efficiency ratio, white adipose tissue volume, and adipocyte size. Moreover, it decreased the expression of the lipogenic gene Ppar-γ in the liver, while significantly increasing the expression of the fat oxidation gene Ppar-α in the white adipose tissue. Notably, treatment with a combination of the two strains significantly reduced the plasma levels of the obesity hormone leptin and altered the microbiota and metabolome. The omics data also indicated the alteration of anti-obesity microbes and metabolites such as Akkermansia and indolelactic acid, respectively. These findings suggest that treatment with a combination of BEPC22 and BELP53 exerts synergistic beneficial effects against obesity.
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Affiliation(s)
- Na-Rae Lee
- Research Institute for Bioactive-Metabolome Network, Konkuk University, Seoul 05029, Republic of Korea
| | - Tae-Jun Kwon
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation (K-MEDI Hub), Daegu 41061, Republic of Korea.
| | - Eui-Chun Chung
- R&D Center, Hecto Healthcare Co., Ltd, Seoul 06142, Republic of Korea.
| | - Jaewoong Bae
- R&D Center, Hecto Healthcare Co., Ltd, Seoul 06142, Republic of Korea.
| | - Song-Hui Soung
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05209, Republic of Korea
| | - Hyun-Ji Tak
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05209, Republic of Korea
| | - Jun-Young Choi
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation (K-MEDI Hub), Daegu 41061, Republic of Korea.
| | - Young-Eun Lee
- Cognitive Science Research Group, Korea Brain Research Institute, Daegu 41062, Republic of Korea
| | - Nak Won Hwang
- R&D Center, Hecto Healthcare Co., Ltd, Seoul 06142, Republic of Korea.
| | - Jong Seo Lee
- R&D Center, Hecto Healthcare Co., Ltd, Seoul 06142, Republic of Korea.
| | - Kum-Joo Shin
- R&D Center, Hecto Healthcare Co., Ltd, Seoul 06142, Republic of Korea.
| | - Choong Hwan Lee
- Research Institute for Bioactive-Metabolome Network, Konkuk University, Seoul 05029, Republic of Korea
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05209, Republic of Korea
| | - KilSoo Kim
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation (K-MEDI Hub), Daegu 41061, Republic of Korea.
- College of Veterinary Medicine, Kyungpook National University, 80 Daehakro, Buk-gu, Daegu 41566, Korea
| | - Seokjin Kim
- R&D Center, Hecto Healthcare Co., Ltd, Seoul 06142, Republic of Korea.
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Lee B, Kim MC, Kim YR, Kim JH, Kwon TJ, Jung DJ, Kim UK, Lee KY. Therapeutic effect of intraperitoneal dexamethasone on noise-induced permanent threshold shift in mice model. Exp Brain Res 2024; 242:257-265. [PMID: 38010535 DOI: 10.1007/s00221-023-06742-2] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 10/17/2023] [Indexed: 11/29/2023]
Abstract
The purpose of the study was to which investigate whether dexamethasone, which has anti-inflammatory and immune response suppression roles, could treat noise-induced hearing loss caused by damage to hair cells in the cochlea. The experiment used 8-week-old CBA mice exposed to white noise at an intensity of 110 dB SPL for 2 h, with hearing loss confirmed by the auditory brainstem response test. Dexamethasone was administered by intraperitoneal injection for 5 days, and the therapeutic effect was investigated for 3 weeks. The experimental groups were 3 mg/kg of dexamethasone (3 mpk) and 10 mg/kg of dexamethasone (10 mpk), and the control group was a saline-administered group. The results showed that compared to the control group, the hearing threshold value was recovered by 10 dB SPL compared to the saline group from the 14th day in the 3 mpk group. In the 10 mpk group, thresholds were recovered from the 7th day compared to the saline group. This difference was similar at 4 kHz, and in the case of the 10 mpk group, the threshold was recovered by 20 dB SPL compared to the saline group. The study also confirmed the restoration of nerve cell activity and showed a recovery effect of about 20 µV in the amplitude value change in the 10 mpk group. In conclusion, the study suggests that dexamethasone has a therapeutic effect for noise-induced hearing loss by increasing the activity of nerve cells and showing a recovery effect from hair cells damaged by noise.
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Affiliation(s)
- Byeonghyeon Lee
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (KMEDI-Hub), Daegu, Korea
| | - Min-Cheol Kim
- Department of Biology, College of Natural Science, Kyungpook National University, Daegu, Korea
- School of Life Sciences, KNU Creative BioResearch Group (BK21 Plus Project), Kyungpook National University, Daegu, Korea
| | - Ye-Ri Kim
- Department of Biology, College of Natural Science, Kyungpook National University, Daegu, Korea
- Advanced Bio-Resource Research Center, Kyungpook National University, Daegu, Korea
| | - Jong-Heun Kim
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation (KMEDI-Hub), Daegu, Korea
| | - Tae-Jun Kwon
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation (KMEDI-Hub), Daegu, Korea
| | - Da Jung Jung
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyungpook National University, Daegu, Korea
| | - Un-Kyung Kim
- Department of Biology, College of Natural Science, Kyungpook National University, Daegu, Korea.
- School of Life Sciences, KNU Creative BioResearch Group (BK21 Plus Project), Kyungpook National University, Daegu, Korea.
| | - Kyu-Yup Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyungpook National University, Daegu, Korea.
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Park HJ, Choi G, Ha S, Kim Y, Choi MJ, Kim M, Islam MK, Chang Y, Kwon TJ, Kim D, Jang E, Kim TH, Chang SJ, Kim YH. MBP-11901 Inhibits Tumor Growth of Hepatocellular Carcinoma through Multitargeted Inhibition of Receptor Tyrosine Kinases. Cancers (Basel) 2022; 14:cancers14081994. [PMID: 35454900 PMCID: PMC9030223 DOI: 10.3390/cancers14081994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/07/2022] [Accepted: 04/08/2022] [Indexed: 12/02/2022] Open
Abstract
Simple Summary Although various treatments such as surgery and chemotherapy exist for advanced or unresectable HCC, most patients suffer from intractable diseases, having a poor prognosis. While immunotherapy using immune checkpoint inhibitors was recently proposed for HCC, only a small percentage of patients respond. Thus, there remains an unmet need for the development of therapeutic agents for the treatment of liver cancer. Here, we presented multi-RTKi MBP-11901, an innovative targeted anticancer agent for HCC, suggesting it as a new therapeutic strategy for the treatment of liver cancer. Abstract Hepatocellular carcinomas (HCCs) are aggressive tumors with a poor prognosis. Approved first-line treatments include sorafenib, lenvatinib, and a combination of atezolizumab and bevacizumab; however, they do not cure HCC. We investigated MBP-11901 as a drug candidate for HCC. Cell proliferation and cytotoxicity were evaluated using normal and cancer human liver cell lines, while Western blotting and flow cytometry evaluated apoptosis. The anticancer effect of MBP-11901 was verified in vitro through migration, invasion, colony formation, and JC-1 MMP assays. In mouse models, the tumor volume, tumor weight, and bodyweight were measured, and cancer cell proliferation and apoptosis were analyzed. The toxicity of MBP-11901 was investigated through GOT/GPT and histological analyses in the liver and kidney. The signaling mechanism of MBP-11901 was investigated through kinase assays, phosphorylation analysis, and in silico docking simulations. Results. MBP-11901 was effective against various human HCC cell lines, leading to the disappearance of most tumors when administered orally in animal models. This effect was dose-dependent, with no differences in efficacy according to administration intervals. MBP-11901 induced anticancer effects by targeting the signaling mechanisms of FLT3, VEGFR2, c-KIT, and PDGFRβ. MBP-11901 is suggested as a novel therapeutic agent for the treatment of advanced or unresectable liver cancer.
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Affiliation(s)
- Hyun Jin Park
- R&D Center, Etnova Therapeutics Corp., 124, Sagimakgol-ro, Jungwon-gu, Seongnam-si 13207, Korea; (H.J.P.); (G.C.); (Y.K.); (M.-J.C.); (S.J.C.)
| | - Garam Choi
- R&D Center, Etnova Therapeutics Corp., 124, Sagimakgol-ro, Jungwon-gu, Seongnam-si 13207, Korea; (H.J.P.); (G.C.); (Y.K.); (M.-J.C.); (S.J.C.)
| | - Seongmin Ha
- Institute of Biomedical Engineering Research, Kyungpook National University, 680, Gukchaebosang-ro, Jung-gu, Daegu 41944, Korea; (S.H.); (M.K.I.); (Y.C.)
| | - Yesl Kim
- R&D Center, Etnova Therapeutics Corp., 124, Sagimakgol-ro, Jungwon-gu, Seongnam-si 13207, Korea; (H.J.P.); (G.C.); (Y.K.); (M.-J.C.); (S.J.C.)
| | - Min-Jin Choi
- R&D Center, Etnova Therapeutics Corp., 124, Sagimakgol-ro, Jungwon-gu, Seongnam-si 13207, Korea; (H.J.P.); (G.C.); (Y.K.); (M.-J.C.); (S.J.C.)
| | - Minsup Kim
- InCerebro Drug Discovery Institute, Seoul 01811, Korea;
| | - Md. Kamrul Islam
- Institute of Biomedical Engineering Research, Kyungpook National University, 680, Gukchaebosang-ro, Jung-gu, Daegu 41944, Korea; (S.H.); (M.K.I.); (Y.C.)
| | - Yongmin Chang
- Institute of Biomedical Engineering Research, Kyungpook National University, 680, Gukchaebosang-ro, Jung-gu, Daegu 41944, Korea; (S.H.); (M.K.I.); (Y.C.)
| | - Tae-Jun Kwon
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80, Cheombok-ro, Dong-gu, Daegu 41061, Korea; (T.-J.K.); (D.K.)
| | - Dongkyu Kim
- Preclinical Research Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80, Cheombok-ro, Dong-gu, Daegu 41061, Korea; (T.-J.K.); (D.K.)
| | - Eunbee Jang
- College of Pharmacy, Daegu Catholic University, 13-13, Hayang-ro, Hayang-eup, Gyeongsan-si 38430, Korea; (E.J.); (T.H.K.)
| | - Tae Hwan Kim
- College of Pharmacy, Daegu Catholic University, 13-13, Hayang-ro, Hayang-eup, Gyeongsan-si 38430, Korea; (E.J.); (T.H.K.)
| | - Sha Joung Chang
- R&D Center, Etnova Therapeutics Corp., 124, Sagimakgol-ro, Jungwon-gu, Seongnam-si 13207, Korea; (H.J.P.); (G.C.); (Y.K.); (M.-J.C.); (S.J.C.)
| | - Yeoun-Hee Kim
- R&D Center, Etnova Therapeutics Corp., 124, Sagimakgol-ro, Jungwon-gu, Seongnam-si 13207, Korea; (H.J.P.); (G.C.); (Y.K.); (M.-J.C.); (S.J.C.)
- Correspondence: ; Tel.: +82-31-776-3403
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Kwon TJ, Jang E, Lee DS, Haque ME, Park RW, Lee B, Lee SB, Kim D, Jeon YH, Kim KS, Kim SK. Development of a Noninvasive KIM-1-Based Live-Imaging Technique in the Context of a Drug-Induced Kidney-Injury Mouse Model. ACS Appl Bio Mater 2021; 4:1508-1514. [DOI: 10.1021/acsabm.0c01392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tae-Jun Kwon
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80 Cheombok-ro, Dong-gu, Daegu 41061, Korea
| | - Eunseo Jang
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80 Cheombok-ro, Dong-gu, Daegu 41061, Korea
| | - Da-Sol Lee
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80 Cheombok-ro, Dong-gu, Daegu 41061, Korea
| | - Md. Enamul Haque
- Department of Biochemistry and Cell Biology, BK21 Plus KNU Biomedical Convergence Program, CMRI, School of Medicine, Kyungpook National University, Daegu 41566, Korea
| | - Rang-Woon Park
- Department of Biochemistry and Cell Biology, BK21 Plus KNU Biomedical Convergence Program, CMRI, School of Medicine, Kyungpook National University, Daegu 41566, Korea
| | - Byungheon Lee
- Department of Biochemistry and Cell Biology, BK21 Plus KNU Biomedical Convergence Program, CMRI, School of Medicine, Kyungpook National University, Daegu 41566, Korea
| | - Sang Bong Lee
- Korea Institute of Medical Microrobotics (KIMIRo), Gwangju 61011, Korea
| | - Dongkyu Kim
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80 Cheombok-ro, Dong-gu, Daegu 41061, Korea
| | - Yong-Hyun Jeon
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80 Cheombok-ro, Dong-gu, Daegu 41061, Korea
| | - Kil-Soo Kim
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80 Cheombok-ro, Dong-gu, Daegu 41061, Korea
- College of Veterinary Medicine, Kyungpook National University, Daegu 41566, Korea
| | - Sang Kyoon Kim
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation, 80 Cheombok-ro, Dong-gu, Daegu 41061, Korea
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Kim MA, Ryu N, Kim HM, Kim YR, Lee B, Kwon TJ, Bok J, Kim UK. Targeted Gene Delivery into the Mammalian Inner Ear Using Synthetic Serotypes of Adeno-Associated Virus Vectors. Mol Ther Methods Clin Dev 2019; 13:197-204. [PMID: 30805407 PMCID: PMC6374519 DOI: 10.1016/j.omtm.2019.01.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 01/07/2019] [Indexed: 12/15/2022]
Abstract
Targeting specific cell types in the mammalian inner ear is important for treating genetic hearing loss due to the different cell type-specific functions. Adeno-associated virus (AAV) is an efficient in vivo gene transfer vector, and it has demonstrated promise for treating genetic hearing loss. Although more than 100 AAV serotypes have been identified, few studies have investigated whether AAV can be distributed to specific inner ear cell types. Here we screened three EGFP-AAV reporter constructs (serotypes DJ, DJ8, and PHP.B) in the neonatal mammalian inner ear by injection via the round window membrane to determine the cellular specificity of the AAV vectors. Sensory hair cells, supporting cells, cells in Reissner’s membrane, interdental cells, and root cells were successfully transduced. Hair cells in the cochlear sensory epithelial region were the most frequently transduced cell type by all tested AAV serotypes. The recombinant DJ serotype most effectively transduced a range of cell types at a high rate. Our findings provide a basis for improving treatment of hereditary hearing loss using targeted AAV-mediated gene therapy.
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Affiliation(s)
- Min-A Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Nari Ryu
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Hye-Min Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Ye-Ri Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Byeonghyeon Lee
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Tae-Jun Kwon
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Republic of Korea
| | - Jinwoong Bok
- Department of Anatomy, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
- BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
- Corresponding author: Jinwoong Bok, PhD, Department of Anatomy, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.
| | - Un-Kyung Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Republic of Korea
- Corresponding author: Un-Kyung Kim, PhD, Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu 41566, Republic of Korea.
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Ryu N, Lee S, Park HJ, Lee B, Kwon TJ, Bok J, Park CI, Lee KY, Baek JI, Kim UK. Identification of a novel splicing mutation within SLC17A8 in a Korean family with hearing loss by whole-exome sequencing. Gene 2017. [PMID: 28647561 DOI: 10.1016/j.gene.2017.06.040] [Citation(s) in RCA: 7] [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] [Indexed: 12/22/2022]
Abstract
Hereditary hearing loss (HHL) is a common genetically heterogeneous disorder, which follows Mendelian inheritance in humans. Because of this heterogeneity, the identification of the causative gene of HHL by linkage analysis or Sanger sequencing have shown economic and temporal limitations. With recent advances in next-generation sequencing (NGS) techniques, rapid identification of a causative gene via massively parallel sequencing is now possible. We recruited a Korean family with three generations exhibiting autosomal dominant inheritance of hearing loss (HL), and the clinical information about this family revealed that there are no other symptoms accompanied with HL. To identify a causative mutation of HL in this family, we performed whole-exome sequencing of 4 family members, 3 affected and an unaffected. As the result, A novel splicing mutation, c.763+1G>T, in the solute carrier family 17, member 8 (SLC17A8) gene was identified in the patients, and the genotypes of the mutation were co-segregated with the phenotype of HL. Additionally, this mutation was not detected in 100 Koreans with normal hearing. Via NGS, we detected a novel splicing mutation that might influence the hearing ability within the patients with autosomal dominant non-syndromic HL. Our data suggests that this technique is a powerful tool to discover causative genetic factors of HL and facilitate diagnoses of the primary cause of HHL.
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Affiliation(s)
- Nari Ryu
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea; School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea
| | - Seokwon Lee
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea; School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea
| | | | - Byeonghyeon Lee
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea; School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea
| | - Tae-Jun Kwon
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu, Republic of Korea
| | - Jinwoong Bok
- Department of Anatomy, Yonsei University College of Medicine, Seoul, Republic of Korea; Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Republic of Korea; BK21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Chan Ik Park
- Department of Aroma-applied Industry, Daegu Haany University, Gyeongsan, Republic of Korea
| | - Kyu-Yup Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Jeong-In Baek
- Department of Aroma-applied Industry, Daegu Haany University, Gyeongsan, Republic of Korea.
| | - Un-Kyung Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea; School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea.
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Kim MA, Cho HJ, Bae SH, Lee B, Oh SK, Kwon TJ, Ryoo ZY, Kim HY, Cho JH, Kim UK, Lee KY. Methionine Sulfoxide Reductase B3-Targeted In Utero Gene Therapy Rescues Hearing Function in a Mouse Model of Congenital Sensorineural Hearing Loss. Antioxid Redox Signal 2016; 24:590-602. [PMID: 26649646 PMCID: PMC4840920 DOI: 10.1089/ars.2015.6442] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
AIMS Methionine sulfoxide reductase B3 (MsrB3), which stereospecifically repairs methionine-R-sulfoxide, is an important Msr protein that is associated with auditory function in mammals. MsrB3 deficiency leads to profound congenital hearing loss due to the degeneration of stereociliary bundles and the apoptotic death of cochlear hair cells. In this study, we investigated a fundamental treatment strategy in an MsrB3 deficiency mouse model and confirmed the biological significance of MsrB3 in the inner ear using MsrB3 knockout (MsrB3(-/-)) mice. RESULTS We delivered a recombinant adeno-associated virus encoding the MsrB3 gene directly into the otocyst at embryonic day 12.5 using a transuterine approach. We observed hearing recovery in the treated ears of MsrB3(-/-) mice at postnatal day 28, and we confirmed MsrB3 mRNA and protein expression in cochlear extracts. Additionally, we demonstrated that the morphology of the stereociliary bundles in the rescued ears of MsrB3(-/-) mice was similar to those in MsrB3(+/+) mice. INNOVATION To our knowledge, this is the first study to demonstrate functional and morphological rescue of the hair cells of the inner ear in the MsrB3 deficiency mouse model of congenital genetic sensorineural hearing loss using an in utero, virus-mediated gene therapy approach. CONCLUSION Our results provide insight into the role of MsrB3 in hearing function and bring us one step closer to hearing restoration as a fundamental therapy.
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Affiliation(s)
- Min-A Kim
- 1 Department of Biology, College of Natural Sciences, Kyungpook National University , Daegu, Republic of Korea.,2 School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University , Daegu, Republic of Korea
| | - Hyun-Ju Cho
- 1 Department of Biology, College of Natural Sciences, Kyungpook National University , Daegu, Republic of Korea
| | - Seung-Hyun Bae
- 1 Department of Biology, College of Natural Sciences, Kyungpook National University , Daegu, Republic of Korea.,2 School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University , Daegu, Republic of Korea
| | - Byeonghyeon Lee
- 1 Department of Biology, College of Natural Sciences, Kyungpook National University , Daegu, Republic of Korea.,2 School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University , Daegu, Republic of Korea
| | - Se-Kyung Oh
- 1 Department of Biology, College of Natural Sciences, Kyungpook National University , Daegu, Republic of Korea.,2 School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University , Daegu, Republic of Korea.,3 Division of Life Sciences, Korea Polar Research Institute (KOPRI) , Incheon, Republic of Korea
| | - Tae-Jun Kwon
- 4 Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF) , Daegu, Republic of Korea
| | - Zae-Young Ryoo
- 5 School of Life Science and Biotechnology, College of Natural Sciences, Kyungpook National University , Daegu, Republic of Korea
| | - Hwa-Young Kim
- 6 Department of Biochemistry and Molecular Biology, Yeungnam University College of Medicine , Daegu, Republic of Korea
| | - Jin-Ho Cho
- 7 Department of Electronic Engineering, College of IT Engineering, Kyungpook National University , Daegu, Republic of Korea
| | - Un-Kyung Kim
- 1 Department of Biology, College of Natural Sciences, Kyungpook National University , Daegu, Republic of Korea.,2 School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University , Daegu, Republic of Korea
| | - Kyu-Yup Lee
- 8 Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyungpook National University , Daegu, Republic of Korea
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Lee SJ, Chae YS, Kwon TJ, Chung JH, Lee J, Jung JH, Kim WW, Park HY, Jeong JY, Park SH, Park S. Abstract P4-09-21: Dual expression of aquaporin 3 and 5 in patients with early breast cancer. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p4-09-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: We reported separately that AQP5 or AQP3 expression in tumor tissue may predict survival after surgery for the specific types of early breast cancer (EBC). However, there is no definitive evidence for the role of dual expression of the two AQPs. Therefore, the current study focused the association and its prognostic impact of their tumoral expressions in the same patients.
Patients and Methods: AQP3 and AQP5 expressions were investigated on the basis of the immunohistochemistry of tissue microarray specimens from 447 EBC patients who underwent surgery between 2003 and 2008 as described in previous studies. Patients were divided into 4 subgroups based on AQP3 and AQP5 expressions: group1 for (-/-), group2 for (-/+), group 3 for (+/-), and group 4 for (+/+), respectively.
Results: Among 477 patients, the number of patients for each group was as follows: group 1 (n=193, 43.2%), group 2 (n=74, 16.6%), group3 (n=110, 24.6%) and group 4 (n=70, 15.7%), respectively. In the current study a positive correlation was identified between AQP3 and 5 expressions (P=0.017 by a χ2- test) in particular for HER2- overexpressing and ER-positive tumors (P=0.009 and 0.044, respectively). Multivariate survival analysis showed that dual expression of AQP3 and AQP5 was a negative prognostic factor for relapse-free or distant disease-free survival for patients with HER2-overexpressing EBC (HR=3.107 and 3.683; P=0.043 and 0.027, respectively), statistically more prominent compared in case with AQP3 expression alone (HR=3.137 and 2.784; P=0.036 and 0.070, respectively).
Conclusion: Dual expression of AQP3 and AQP5 in tumor tissue may be considered as a potential prognostic marker in patients with HER2-overexpressing EBC after curative surgery.
Citation Format: Lee SJ, Chae YS, Kwon TJ, Chung JH, Lee J, Jung JH, Kim WW, Park HY, Jeong JY, Park S-H, Park S. Dual expression of aquaporin 3 and 5 in patients with early breast cancer. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P4-09-21.
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Affiliation(s)
- SJ Lee
- Kyungpook National University Medical Center, Daegu, Korea; Kyungpook National University Medical Center
| | - YS Chae
- Kyungpook National University Medical Center, Daegu, Korea; Kyungpook National University Medical Center
| | - TJ Kwon
- Kyungpook National University Medical Center, Daegu, Korea; Kyungpook National University Medical Center
| | - JH Chung
- Kyungpook National University Medical Center, Daegu, Korea; Kyungpook National University Medical Center
| | - J Lee
- Kyungpook National University Medical Center, Daegu, Korea; Kyungpook National University Medical Center
| | - JH Jung
- Kyungpook National University Medical Center, Daegu, Korea; Kyungpook National University Medical Center
| | - WW Kim
- Kyungpook National University Medical Center, Daegu, Korea; Kyungpook National University Medical Center
| | - HY Park
- Kyungpook National University Medical Center, Daegu, Korea; Kyungpook National University Medical Center
| | - JY Jeong
- Kyungpook National University Medical Center, Daegu, Korea; Kyungpook National University Medical Center
| | - S-H Park
- Kyungpook National University Medical Center, Daegu, Korea; Kyungpook National University Medical Center
| | - S Park
- Kyungpook National University Medical Center, Daegu, Korea; Kyungpook National University Medical Center
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Kwon TJ, Oh SK, Park HJ, Sato O, Venselaar H, Choi SY, Kim S, Lee KY, Bok J, Lee SH, Vriend G, Ikebe M, Kim UK, Choi JY. The effect of novel mutations on the structure and enzymatic activity of unconventional myosins associated with autosomal dominant non-syndromic hearing loss. Open Biol 2015; 4:rsob.140107. [PMID: 25080041 PMCID: PMC4118606 DOI: 10.1098/rsob.140107] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Mutations in five unconventional myosin genes have been associated with genetic hearing loss (HL). These genes encode the motor proteins myosin IA, IIIA, VI, VIIA and XVA. To date, most mutations in myosin genes have been found in the Caucasian population. In addition, only a few functional studies have been performed on the previously reported myosin mutations. We performed screening and functional studies for mutations in the MYO1A and MYO6 genes in Korean cases of autosomal dominant non-syndromic HL. We identified four novel heterozygous mutations in MYO6. Three mutations (p.R825X, p.R991X and Q918fsX941) produce a premature truncation of the myosin VI protein. Another mutation, p.R205Q, was associated with diminished actin-activated ATPase activity and actin gliding velocity of myosin VI in an in vitro analysis. This finding is consistent with the results of protein modelling studies and corroborates the pathogenicity of this mutation in the MYO6 gene. One missense variant, p.R544W, was found in the MYO1A gene, and in silico analysis suggested that this variant has deleterious effects on protein function. This finding is consistent with the results of protein modelling studies and corroborates the pathogenic effect of this mutation in the MYO6 gene.
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Affiliation(s)
- Tae-Jun Kwon
- School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University, Daegu, South Korea
| | - Se-Kyung Oh
- School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University, Daegu, South Korea
| | | | - Osamu Sato
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA, USA
| | - Hanka Venselaar
- Centre for Molecular and Biomolecular Informatics, Radboudumc, Nijmegen, The Netherlands
| | - Soo Young Choi
- Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - SungHee Kim
- Department of Otolaryngology, Fatima Hospital, Daegu, South Korea
| | - Kyu-Yup Lee
- Department of Otolaryngology, College of Medicine, Kyungpook National University, Daegu, South Korea
| | - Jinwoong Bok
- Department of Anatomy, Yonsei University College of Medicine, Seoul, South Korea BK21 Project for Medical Science, Yonsei University College of Medicine, Seoul, South Korea
| | - Sang-Heun Lee
- Department of Otolaryngology, College of Medicine, Kyungpook National University, Daegu, South Korea
| | - Gert Vriend
- Centre for Molecular and Biomolecular Informatics, Radboudumc, Nijmegen, The Netherlands
| | - Mitsuo Ikebe
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA, USA
| | - Un-Kyung Kim
- School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University, Daegu, South Korea
| | - Jae Young Choi
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, South Korea
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Kwon TJ, Oh SK, Kim YR, Kim MA, Lee B, Choi KS, Lee J, Kim UK, Lee KY. Methionine sulfoxide reductase A, B1 and B2 are likely to be involved in the protection against oxidative stress in the inner ear. Cells Tissues Organs 2014; 199:294-300. [PMID: 25531578 DOI: 10.1159/000368893] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/06/2014] [Indexed: 11/19/2022] Open
Abstract
The methionine sulfoxide reductase (Msr) family of proteins is a class of repair enzymes that reduce methionine-S (MsrA) or methionine-R (MsrB) sulfoxide to methionine. Recent studies have reported that mutations in the MSRB3 gene cause autosomal recessive hearing loss in humans, and in mice MsrB3 deficiency leads to profound hearing loss due to hair cell apoptosis and stereocilia degeneration. However, apart from MsrB3, studies on Msr proteins in the inner ear have not yet been reported. In this study, we identified and characterized Msr expression in the cochlea and vestibule. First, we confirmed RNA expression levels of Msr family members in the cochlea and vestibule using reverse transcription PCR and detected Msr family members in both tissues. We also conducted immunohistochemical staining to localize Msr family members within the cochlea and vestibule. In the cochlea, MsrA was detected in supporting cells, spiral ligament, spiral limbus, Reissner's membrane and the spiral ganglion. MsrB1 was specifically expressed in hair cells and the spiral ganglion. MsrB2 was noted in the spiral ganglion, tectorial membrane and stria vascularis. In the vestibule, MsrA and MsrB1 were detected in hair cells and the vestibular ganglion, while MsrB2 was restricted to the vestibular ganglion. In this study, we identified distinct distributions of Msr family members in the organ of Corti and hypothesized that MsrA, MsrB1 and MsrB2 protect proteins in the organ of Corti from oxidative stress.
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Affiliation(s)
- Tae-Jun Kwon
- School of Life Sciences, KNU Creative BioResearch Group (BK21 Plus Project), Kyungpook National University, Daegu, South Korea
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Kwon TJ, Kim DB, Bae JW, Sagong B, Choi SY, Cho HJ, Kim UK, Lee KY. Erratum to “Molecular cloning, characterization, and expression of pannexin genes in chicken” [Poult. Sci. 93(9): 2253–2261]. Poult Sci 2014. [DOI: 10.3382/ps.2014-93-10-2687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Kwon TJ, Kim DB, Bae JW, Sagong B, Choi SY, Cho HJ, Kim UK, Lee KY. Molecular cloning, characterization, and expression of pannexin genes in chicken. Poult Sci 2014; 93:2253-61. [PMID: 25002553 DOI: 10.3382/ps.2013-03867] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 11/20/2022] Open
Abstract
Pannexins (Panx) are a family of proteins that share sequences with the invertebrate gap junction proteins, innexins, and have a similar structure to that of the vertebrate gap junction proteins, connexins. To date, the Panx family consists of 3 members, but their genetic sequences have only been completely determined in a few vertebrate species. Moreover, expression of the Panx family has been reported in several rodent tissues: Panx1 is ubiquitously expressed in mammals, whereas Panx2 and Panx3 expressions are more restricted. Although members of the Panx family have been detected in mammals, their genetic sequences in avian species have not yet been fully elucidated. Here, we obtained the full-length mRNA sequences of chicken PANX genes and evaluated the homology of the amino acids from these sequences with those of other species. Furthermore, PANX gene expression in several chicken tissues was investigated based on mRNA levels. PANX1 was detected in the brain, cochlea, chondrocytes, eye, lung, skin, and intestine, and PANX2 was expressed in the brain, eye, and intestine. PANX3 was observed in the cochlea, chondrocytes, and bone. In addition, expression of PANX3 was higher than PANX1 in the cochlea. Immunofluorescent staining revealed PANX1 in hair cells, as well as the supporting cells, ganglion neurons, and the tegmentum vasculosum in chickens, whereas PANX3 was only detected in the bone surrounding the cochlea. Overall, the results of this study provide the first identification and characterization of the sequence and expression of the PANX family in an avian species, and fundamental data for confirmation of Panx function.
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Affiliation(s)
- Tae-Jun Kwon
- School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University, Daegu, 702-701, South Korea
| | - Dong-Bin Kim
- School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University, Daegu, 702-701, South Korea
| | - Jae Woong Bae
- School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University, Daegu, 702-701, South Korea
| | - Borum Sagong
- School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University, Daegu, 702-701, South Korea
| | - Soo-Young Choi
- Department of Medicine, University of Pennsylvania, Philadelphia 19104-4539
| | - Hyun-Ju Cho
- School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University, Daegu, 702-701, South Korea
| | - Un-Kyung Kim
- School of Life Sciences, KNU Creative BioResearch Group (BK21 plus project), Kyungpook National University, Daegu, 702-701, South Korea
| | - Kyu-Yup Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyungpook National University, Daegu, 700-721, South Korea
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Jung DJ, Han M, Jin SU, Lee SH, Park I, Cho HJ, Kwon TJ, Lee HJ, Cho JH, Lee KY, Chang Y. Functional mapping of the auditory tract in rodent tinnitus model using manganese-enhanced magnetic resonance imaging. Neuroimage 2014; 100:642-9. [PMID: 24983712 DOI: 10.1016/j.neuroimage.2014.06.055] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 04/09/2014] [Revised: 06/20/2014] [Accepted: 06/23/2014] [Indexed: 10/25/2022] Open
Abstract
Animal models of salicylate-induced tinnitus have demonstrated that salicylate modulates neuronal activity in several brain structures leading to neuronal hyperactivity in auditory and non-auditory brain areas. In addition, these animal tinnitus models indicate that tinnitus can be a perceptual consequence of altered spontaneous neural activity along the auditory pathway. Peripheral and/or central effects of salicylate can account for neuronal activity changes in salicylate-induced tinnitus. Because of this ambiguity, an in vivo imaging study would be able to address the peripheral and/or central involvement of salicylate-induced tinnitus. Therefore, in the present study, we developed a novel manganese-enhanced magnetic resonance imaging (MEMRI) method to map the in vivo functional auditory tract in a salicylate-induced tinnitus animal model by administrating manganese through the round window. We found that acute salicylate-induced tinnitus resulted in higher manganese uptake in the cochlea and in the central auditory structures. Furthermore, serial MRI scans demonstrated that the manganese signal increased in an anterograde fashion from the cochlea to the cochlear nucleus. Therefore, our in vivo MEMRI data suggest that acute salicylate-induced tinnitus is associated with higher spontaneous neural activity both in peripheral and central auditory pathways.
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Affiliation(s)
- Da Jung Jung
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea
| | - Mun Han
- Department of Medical and Biological Engineering, School of Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea
| | - Seong-Uk Jin
- Department of Medical and Biological Engineering, School of Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea
| | - Sang Heun Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Daegu Veterans Hospital, Daegu, Republic of Korea
| | - Ilyong Park
- Department of Biomedical Engineering, College of Medicine, Dankook University, Cheonan, Republic of Korea
| | - Hyun-Ju Cho
- Department of Biology, College of Natural Science, Kyungpook National University, Daegu, Republic of Korea
| | - Tae-Jun Kwon
- Department of Biology, College of Natural Science, Kyungpook National University, Daegu, Republic of Korea
| | - Hui Joong Lee
- Department of Radiology, School of Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea
| | - Jin Ho Cho
- Department of Electronic Engineering, College of IT Engineering, Kyungpook National University, Daegu, Republic of Korea
| | - Kyu-Yup Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea.
| | - Yongmin Chang
- Department of Medical and Biological Engineering, School of Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea; Department of Radiology, School of Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea; Department of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
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Kwon TJ, Cho HJ, Kim UK, Lee E, Oh SK, Bok J, Bae YC, Yi JK, Lee JW, Ryoo ZY, Lee SH, Lee KY, Kim HY. Methionine sulfoxide reductase B3 deficiency causes hearing loss due to stereocilia degeneration and apoptotic cell death in cochlear hair cells. Hum Mol Genet 2013; 23:1591-601. [PMID: 24191262 DOI: 10.1093/hmg/ddt549] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Methionine sulfoxide reductase B3 (MsrB3) is a protein repair enzyme that specifically reduces methionine-R-sulfoxide to methionine. A recent genetic study showed that the MSRB3 gene is associated with autosomal recessive hearing loss in human deafness DFNB74. However, the precise role of MSRB3 in the auditory system and the pathogenesis of hearing loss have not yet been determined. This work is the first to generate MsrB3 knockout mice to elucidate the possible pathological mechanisms of hearing loss observed in DFNB74 patients. We found that homozygous MsrB3(-/-) mice were profoundly deaf and had largely unaffected vestibular function, whereas heterozygous MsrB3(+/-) mice exhibited normal hearing similar to that of wild-type mice. The MsrB3 protein is expressed in the sensory epithelia of the cochlear and vestibular tissues, beginning at E15.5 and E13.5, respectively. Interestingly, MsrB3 is densely localized at the base of stereocilia on the apical surface of auditory hair cells. MsrB3 deficiency led to progressive degeneration of stereociliary bundles starting at P8, followed by a loss of hair cells, resulting in profound deafness in MsrB3(-/-) mice. The hair cell loss appeared to be mediated by apoptotic cell death, which was measured using TUNEL and caspase 3 immunocytochemistry. Taken together, our data suggest that MsrB3 plays an essential role in maintaining the integrity of hair cells, possibly explaining the pathogenesis of DFNB74 deafness in humans caused by MSRB3 deficiency.
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Affiliation(s)
- Tae-Jun Kwon
- Department of Biology, College of Natural Sciences
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Song MH, Kwon TJ, Kim HR, Jeon JH, Baek JI, Lee WS, Kim UK, Choi JY. Mutational analysis of EYA1, SIX1 and SIX5 genes and strategies for management of hearing loss in patients with BOR/BO syndrome. PLoS One 2013; 8:e67236. [PMID: 23840632 PMCID: PMC3696009 DOI: 10.1371/journal.pone.0067236] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Accepted: 05/15/2013] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Branchio-oto-renal (BOR) or branchio-otic (BO) syndrome is one of the most common forms of autosomal dominant syndromic hearing loss. Mutations in EYA1, SIX1 and SIX5 genes have been associated with BOR syndrome. In this study, clinical and genetic analyses were performed in patients with BOR/BO syndrome focusing on auditory manifestations and rehabilitation. METHODS The audiologic manifestations were reviewed in 10 patients with BOR/BO syndrome. The operative findings and hearing outcome were analyzed in patients who underwent middle ear surgeries. The modality and outcome of auditory rehabilitation were evaluated. Genetic analysis was performed for EYA1, SIX1, and SIX5 genes. RESULTS All patients presented with mixed hearing loss. Five patients underwent middle ear surgeries without successful hearing gain. Cochlear implantation performed in two patients resulted in significant hearing improvement. Genetic analysis revealed four novel EYA1 mutations and a large deletion encompassing the EYA1 gene. CONCLUSIONS Auditory rehabilitation in BOR/BO syndrome should be individually tailored keeping in mind the high failure rate after middle ear surgeries. Successful outcome can be expected with cochlear implantations in patients with BOR/BO syndrome who cannot benefit from hearing aids. The novel EYA1 mutations may add to the genotypic and phenotypic spectrum of BOR syndrome in the East Asian population.
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Affiliation(s)
- Mee Hyun Song
- Department of Otorhinolaryngology, Kwandong University College of Medicine, Myongji Hospital, Goyang, South Korea
| | - Tae-Jun Kwon
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea
| | - Hui Ram Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea
| | - Ju Hyun Jeon
- Department of Otorhinolaryngology, Inje University College of Medicine, Goyang, South Korea
| | - Jeong-In Baek
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea
| | - Won-Sang Lee
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, South Korea
| | - Un-Kyung Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea
- * E-mail: (JYC); (U-KK)
| | - Jae Young Choi
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, South Korea
- * E-mail: (JYC); (U-KK)
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Bae SH, Baek JI, Lee JD, Song MH, Kwon TJ, Oh SK, Jeong JY, Choi JY, Lee KY, Kim UK. Genetic analysis of auditory neuropathy spectrum disorder in the Korean population. Gene 2013; 522:65-9. [PMID: 23562982 DOI: 10.1016/j.gene.2013.02.057] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 02/19/2013] [Accepted: 02/21/2013] [Indexed: 10/27/2022]
Abstract
Auditory neuropathy spectrum disorder (ANSD) is caused by dys-synchronous auditory neural response as a result of impairment of the functions of the auditory nerve or inner hair cells, or synapses between inner hair cells and the auditory nerve. To identify a causative gene causing ANSD in the Korean population, we conducted gene screening of the OTOF, DIAPH3, and PJVK genes in 19 unrelated Korean patients with ANSD. A novel nonsense mutation (p.Y1064X) and a known pathogenic mutation (p.R1939Q) of the OTOF gene were identified in a patient as compound heterozygote. Pedigree analysis for these mutations showed co-segregation of mutation genotype and the disease in the family, and it supported that the p.Y1064X might be a novel genetic cause of autosomal recessive ANSD. A novel missense variant p.K1017R (c.3050A>G) in the DIAPH3 gene was also identified in the heterozygous state. In contrast, no mutation was detected in the PJVK gene. These results indicate that no major causative gene has been reported to date in the Korean population and that pathogenic mutations in undiscovered candidate genes may have an effect on ANSD.
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Affiliation(s)
- Seung-Hyun Bae
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea
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Jeong YH, Park Y, Muse WC, Kwon TJ, Koh JS, Hwang SJ, Kwak CH, Hwang JY. Pharmacodynamic effect of clopidogrel therapy and switching to cilostazol in patients with the CYP2C19 loss-of-function allele (ACCEL-SWITCH) study. J Thromb Haemost 2012; 10:1685-8. [PMID: 22612904 DOI: 10.1111/j.1538-7836.2012.04788.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Kim HK, Kim YH, Sagong B, Kwon TJ, Oh SK, Lee HJ, Lee KY, Lee SH, Kim UK. Molecular analysis of TMC1 gene in the Korean patients with nonsyndromic hearing loss. Genes Genomics 2011. [DOI: 10.1007/s13258-010-0132-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Bae JW, Kim UK, Kwon TJ, Choi SJ, Ye MK. Polymorphisms of TAS1R3 and GNAT3 Genes Are Associated with Patients with Taste Disorder. ACTA ACUST UNITED AC 2011. [DOI: 10.5352/jls.2011.21.3.412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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20
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Park HJ, Cho HJ, Baek JI, Ben-Yosef T, Kwon TJ, Griffith AJ, Kim UK. Evidence for a founder mutation causing DFNA5 hearing loss in East Asians. J Hum Genet 2009; 55:59-62. [PMID: 19911014 DOI: 10.1038/jhg.2009.114] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Mutations in the DFNA5 gene are known to cause autosomal dominant non-syndromic hearing loss (ADNSHL). To date, five DFNA5 mutations have been reported, all of which were different in the genomic level. In this study, we ascertained a Korean family with autosomal dominant, progressive and sensorineural hearing loss and performed linkage analysis that revealed linkage to the DFNA5 locus on chromosome 7. Sequence analysis of DFNA5 identified a 3-bp deletion in intron 7 (c.991-15_991-13del) as the cause of hearing loss in this family. As the same mutation had been reported in a large Chinese family segregating DFNA5 hearing loss, we compared their DFNA5 mutation-linked haplotype with that of the Korean family. We found a conserved haplotype, suggesting that the 3-bp deletion is derived from a single origin in these families. Our observation raises the possibility that this mutation may be a common cause of autosomal dominant progressive hearing loss in East Asians.
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Lee SK, Ameno K, Yang JY, In SW, Kim KU, Kwon TJ, Yoo YC, Kubota T, Ameno S, Ijiri I. Forensic toxicological implication of acute fatal poisoning cases due to benfuracarb ingestion. Int J Legal Med 1999; 112:268-70. [PMID: 10433038 DOI: 10.1007/s004140050247] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
We describe here three cases involving acute fatalities due to benfuracarb ingestion and the forensic toxicological implications. Benfuracarb, a carbamate insecticide and its main metabolite carbofuran, were detected using thin layer chromatography (TLC) and gas chromatography/mass spectrophotometry (GC/MS) after extraction with ethyl acetate and then quantified using gas chromatography (GC) equipped with NPD. The blood levels of benfuracarb and carbofuran were in the range of 0.30-2.32 microg/ml and 1.45-1.47 microg/ml, respectively. Benfuracarb was not detected in urine, but carbofuran was detected in the range of 0.53-2.66 microg/ml.
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Affiliation(s)
- S K Lee
- National Institute of Scientific Investigation, Seoul, Korea.
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Kim SK, Ro JY, Kemp BL, Lee JS, Kwon TJ, Hong WK, Mao L. Identification of two distinct tumor-suppressor loci on the long arm of chromosome 10 in small cell lung cancer. Oncogene 1998; 17:1749-53. [PMID: 9796705 DOI: 10.1038/sj.onc.1202073] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Recent cytogenetic studies indicated that loss of the long arm of chromosome 10 is a frequent event in small cell lung cancer (SCLC) and that a common region of the deletion is at 10q24-qter, which suggests the presence of a tumor-suppressor gene there. To map precise tumor-suppressor loci on the chromosome arm for further positional cloning efforts, we tested 46 primary SCLCs using microsatellite analysis. By analysing 11 highly polymorphic microsatellite markers located in 10q23-q26, we found that at least 78% (36/46) of the tumors exhibited loss of heterozygosity (LOH) at 10q with at least two distinct minimally deleted regions. LOH at one region (10q24) was found in at least 74% (32/43) of informative cases with a minimally deleted region between D10S198 and D1OS192 (about 2 cM); LOH at another region (10q24-q25) was observed in at least 66% (29/44) of informative tumors with a minimally deleted region between D10S221 and D10S587 (about 11 cM). LOH at both regions or across both regions was observed in at least 52% (24/46) of the tumors tested. However, no mutations or homozygous deletions were found in the coding region of MXI1, a candidate tumor suppressor gene at 10q24-q25, in a panel of SCLC cell lines. Our data demonstrate that at least two tumor-suppressor loci exist on 10q and that they may play an important role in SCLC tumorigenesis.
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Affiliation(s)
- S K Kim
- Department of Thoracic/Head and Neck Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston 77030, USA
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Kim SK, Ro JY, Kemp BL, Lee JS, Kwon TJ, Fong KM, Sekido Y, Minna JD, Hong WK, Mao L. Identification of three distinct tumor suppressor loci on the short arm of chromosome 9 in small cell lung cancer. Cancer Res 1997; 57:400-3. [PMID: 9012464] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Deletion at 9p21 is frequent in many tumor types. A candidate tumor suppressor gene, p16INK4a, was mapped to this region and is frequently inactivated by several different mechanisms in many tumor types, including non-small cell lung cancer, but not in small cell lung cancer (SCLC). p16 functions as a cyclin/CDK inhibitor to prevent phosphorylation of pRB. It has been demonstrated that most SCLCs have lost pRB but retained p16, and the inactivation of pRB excludes the inactivation of p16 and vice versa. To determine the potential existence of other tumor suppressor genes on the short arm of chromosome 9 in SCLC, we tested 46 primary SCLCs by microsatellite analysis. We found that more than 89% of the tumors exhibited loss of heterozygosity (LOH) at 9p with three distinct minimal deleted areas. Among those areas, LOH at 9p21 was most frequent (86%), with a peak at a marker 150 kb telomeric to p16INK4a. LOH was also observed in more than 50% of the tumors at two other regions, 9p22 and 9p13. Our data strongly suggest the presence of at least three novel tumor suppressor loci on 9p in SCLC, and further investigations to clone candidate tumor suppressor genes are warranted.
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Affiliation(s)
- S K Kim
- Department of Thoracic/Head and Neck Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston 77030, USA
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Abstract
Clear-cell carcinoma is a convenient and frequently used descriptive term for a malignant epithelial neoplasm that is entirely or largely composed of cells with optically clear cytoplasm in hematoxylin-eosin-stained sections. Transmission electron microscopy was performed on 57 tumors from various sites to investigate the fine structural basis for the clarity of the cytoplasm. The clear appearance resulted from the presence of one or several of the following features, as the sole or predominant cause or in combination: glycogen, lipid droplets, mucin vacuoles or diffuse mucosubstances, dilated cisternae, swollen or unusually large mitochondria, large solitary membrane-limited vacuoles or numerous smaller vacuoles, intracytoplasmic lumens, expanded intercellular spaces, cytoplasmic pseudoinclusions, and a paucity of organelles. Degenerative changes contributed to the clear appearance by inducing swelling of mitochondria and creating lucent cytosol. The factors responsible for the clear cytoplasm were not always consistent with regard to tumor type or site of origin, but glycogen was the commonest reason among the 57 tumors studied and the principal cause in tumors of the female genital tract, skin, and salivary glands, while renal cell carcinomas tended to possess an admixture of glycogen and lipid droplets. Because of the heterogeneity of the subcellular changes that can produce optically clear cytoplasm, electron microscopy has a limited role in determining the primary site of a metastatic clear-cell carcinoma.
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Affiliation(s)
- T J Kwon
- Department of Pathology, University of Texas M. D. Anderson Cancer Center, Houston 77030, USA
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Kwon TJ, Ro JY, Tornos C, Ordonez NG. Reduplicated basal lamina in clear-cell carcinoma of the ovary: an immunohistochemical and electron microscopic study. Ultrastruct Pathol 1996; 20:529-36. [PMID: 8940760 DOI: 10.3109/01913129609016357] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Clear-cell carcinomas of the female genital tract are uncommon tumors that usually arise in the ovary, cervix, or vagina. The objectives of the present study were to examine the immunohistochemical and ultrastructural characteristics of 18 of these tumors and to determine whether any distinctive features were present at the different locations. The fine structure of the neoplastic cells was similar at the several sites but there was a striking difference in the appearance of the basal lamina. Prominent reduplication of the basal lamina was seen in all 7 ovarian carcinomas, whereas it was mild in 3 and absent in 7 of the cervico-vaginal tumors. The distribution of eosinophilic hyaline material in hematoxylin/eosin sections and of immunohistochemical staining for type IV collagen and larminin correlated with the ultrastructural observations. Reduplication of the basal lamina has been observed in a number of epithelial neoplasms and viewed as a criterion of differentiation, but there is currently no evidence that its presence influences the prognosis of clear-cell carcinomas of the ovary.
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Affiliation(s)
- T J Kwon
- Department of Pathology, University of Texas M. D. Anderson Cancer Center, Houston 77030, USA
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Abstract
Cytotoxic T lymphocytes recognize antigenic peptides in association with major histocompatibility complex class I proteins. Although a large set of class I binding peptides has been described, it is not yet easy to search for potentially antigenic peptides without synthesis of a panel of peptides, and subsequent binding assays. In order to predict HLA-A2.1-restricted antigenic epitopes, a computer model of the HLA-A2.1 molecule was established using X-ray crystallography data. In this model nonameric peptide sequences were aligned. In a molecular dynamics (MD) simulation with two sets of peptides known to be presented by HLA-A2.1, it was important to know the anchor amino acid residue preference and the distance between the anchor residues. We show here that the peptides bound to the HLA-A2.1 model structure possess a side chain of C-terminal anchor residue oriented into the binding groove with different distances between the two anchor residues from 15 to 21A. We also synthesized a set of nonamer peptides containing amino acid sequences of Hepatitis B virus protein that were selected on the basis of previously described HLA-A2.1 specific motifs. When results obtained from the MD simulation were compared with functional binding assays using the TAP-deficient cell line T2, it was evident that the MD simulation method improves prediction of the HLA-A2.1 binding epitope sequence. These results suggest that this approach can provide a way to predict peptide epitopes and search for antigenic regions in sequences in a variety of antigens without screening a large number of synthetic peptides.
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Affiliation(s)
- J S Lim
- Genetic Engineering Research Institute, Korea Institute of Science and Technology, Taejon, Korea
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Abstract
Pancreatoblastoma has been described in children and characterized by unique histologic features and excellent clinical course. Ultrastructural and immunohistochemical studies of pancreatoblastoma reveal either exocrine alone or both endocrine and exocrine differentiation. We present two cases of pancreatoblastoma in children in which immunohistochemical and ultrastructural examination failed to demonstrate features of either enzyme or hormone production and which became worse in clinical course. We assume that pancreatoblastomas are tumors which differentiate more toward acinar or ductal elements than toward islet cell.
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Affiliation(s)
- D H Chung
- Department of Pathology Seoul National University College of Medicine, Korea
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Abstract
Malignant rhabdoid tumor is a distinct renal tumor in children. It had been regarded as a rhabdomyosarcomatoid variant of Wilms' tumor, but it is now thought as a separate entity. We report a case of malignant rhabdoid tumor of the kidney in a 26-month-old girl who presented with a left abdominal mass. Grossly, a large mass in the lower pole of the left kidney was well encapsulated and measured 4 x 4 x 3.5cm. On cross section, it was soft and yellowish white and showed multifocal necroses. The mass was mainly located in the medial medullary portion and compressed the renal pelvis laterally. Microscopically, the tumor masses were hypercellular and anaplastic without definite blastematous elements. In larger portion, the tumor cells had abundant eosinophilic cytoplasm and hyaline globules. In addition to the classic "rhabdoid" feature, alveolar, sclerosing, and lymphomatous patterns were seen. Ultrastructurally, tumor cells with abundant cytoplasm contained tangles of intermediate filament corresponding to vimentin in immunostaining.
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Affiliation(s)
- T J Kim
- Department of Pathology, Seoul National University Children's Hospital, Seoul National University College of Medicine, Korea
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Yang KH, Kwon TJ, Choe SY, Yun HS, Chang IM. Protective effect of Aucuba japonica against carbon tetrachloride-induced liver damage in rats. Drug Chem Toxicol 1983; 6:429-41. [PMID: 6628265 DOI: 10.3109/01480548309014165] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Pretreatment of rats with ethanol extract from leaves of Aucuba japonica (600 mg/kg/day, po) for two days protected against CCl4-induced depression in plasma disappearance and biliary excretion of injected sulfobromophthalein (BSP) determined 24 hr after the CCl4 challenge (0.5 ml/kg, ip). Percent recovery of BSP in bile in 60 min for control, CCl4, extract + CCl4 treated rats was 66.8 +/- 1.9, 56.2 +/- 1.4, and 68.9 +/- 2.2, respectively. Pretreatment of the extract also protected CCl4-induced increased serum glutamic-pyruvic transaminase activity and liver necrosis as demonstrated by histological evaluations. However, pretreatment of the extract did not modify the intensity of CCl4-induced lipid peroxidation process or cytochrome P-450 destruction. The results suggest that ethanol extract of Aucuba japonica protects CCl4 hepatotoxicity at a site in the chain events leading to necrosis but not the activation step of CCl4 to X CCl3 and X C1 free radicals.
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