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Shim YJ, Ha JS. Identification of Novel JAK3 Mutations by Whole-Exome Sequencing in a Korean Boy With Severe Combined Immunodeficiency. J Investig Allergol Clin Immunol 2017; 27:187-189. [PMID: 28570225 DOI: 10.18176/jiaci.0151] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Y J Shim
- Department of Pediatrics, Institute for Cancer Research, Keimyung University School of Medicine and Dongsan Medical Center, Daegu, Korea
| | - J S Ha
- Department of Laboratory Medicine, Keimyung University School of Medicine and Dongsan Medical Center, Daegu, Korea
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Kang BH, Shim YJ, Tae YK, Song JA, Choi BK, Park IS, Min BH. Clusterin stimulates the chemotactic migration of macrophages through a pertussis toxin sensitive G-protein-coupled receptor and Gβγ-dependent pathways. Biochem Biophys Res Commun 2014; 445:645-50. [PMID: 24569077 DOI: 10.1016/j.bbrc.2014.02.071] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [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: 02/12/2014] [Accepted: 02/15/2014] [Indexed: 10/25/2022]
Abstract
Clusterin induces the expression of various chemotactic cytokines including tumor necrosis factor-α (TNF-α) in macrophages and is involved in the cell migration. According to the results of this study, clusterin induced the directional migration (chemotaxis) of macrophages based on a checkerboard analysis. The chemotactic activity of clusterin was prevented by pretreatment with pertussis toxin (PTX), indicating that the Gαi/o-protein coupled receptor (GPCR) was involved in the chemotactic response of clusterin. Clusterin-stimulated chemotaxis was abrogated in a dose-dependent manner by pretreatment with gallein (a Gβγ inhibitor), indicating the involvement of Gβγ released from the GPCR. In addition, inhibitors of phospholipase C (PLC, U73122) and phosphoinositide 3-kinase (PI3K, LY294002), the key targets of Gβγ binding and activation, suppressed chemotactic migration by clusterin. The phosphorylation of Akt induced by clusterin was blocked by pretreatment with gallein or LY294002 but not with U73122, indicating that Gβγ released from the PTX-sensitive Gi protein complex activated PLC and PI3K/Akt signaling pathways separately. The activation of cellular MAP kinases was essential in that their inhibitors blocked clusterin-induced chemotaxis, and Gβγ was required for the activation of MAP kinases because gallein reduced their phosphorylations induced by clusterin. In addition, the inflammation-induced migration of macrophages was greatly reduced in clusterin-deficient mice based on a thioglycollate-induced peritonitis model system. These results suggest that clusterin stimulates the chemotactic migration of macrophages through a PTX-sensitive GPCR and Gβγ-dependent pathways and describe a novel role of clusterin as a chemoattractant of monocytes/macrophages, suggesting that clusterin may serve as a molecular bridge between inflammation and its remodeling of related tissue by recruiting immune cells.
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Affiliation(s)
- Byeong-Ho Kang
- Department of Pharmacology, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Young-Jun Shim
- Department of Pharmacology, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Yoo-Keung Tae
- Department of Pharmacology, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Jin-A Song
- Department of Pharmacology, College of Medicine, Korea University, Seoul, Republic of Korea
| | - Byong-Kwan Choi
- Department of Internal Medicine, College of Medicine, Dongguk University Ilsan Hospital, Republic of Korea
| | - In-Sun Park
- Department of Anatomy, College of Medicine, Inha University, Republic of Korea
| | - Bon-Hong Min
- Department of Pharmacology, College of Medicine, Korea University, Seoul, Republic of Korea.
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Shim YJ, Won DI. Pharmacokinetics and prophylactic use of FEIBA in a child with severe congenital factor X deficiency and recurrent spontaneous intracranial haemorrhage: a case report. Haemophilia 2013; 19:e364-7. [PMID: 23902347 DOI: 10.1111/hae.12245] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/08/2013] [Indexed: 11/28/2022]
Affiliation(s)
- Y J Shim
- Hanyoung Children's Hospital and Department of Pediatrics, Kyungpook National University School of Medicine, Daegu, Korea
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Shim YJ, Kang BH, Choi BK, Park IS, Min BH. Clusterin induces the secretion of TNF-α and the chemotactic migration of macrophages. Biochem Biophys Res Commun 2012; 422:200-5. [PMID: 22575505 DOI: 10.1016/j.bbrc.2012.04.162] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Accepted: 04/29/2012] [Indexed: 01/05/2023]
Abstract
Tumor associated macrophages are known to be closely linked with tumor progression and metastasis. On the other hand, clusterin is overexpressed in several tumor types and regarded as a putative tumor-promoting factor due to this overexpression and the subsequent induction of chemoresistance. In our previous study, clusterin was found to induce the expression of matrix metalloproteinase-9 (MMP-9) in macrophages, and MMP-9 is known to be essential for tumor cell migration and invasion via basement membrane breakdown. Because paracrine interactions between tumor cells and surrounding macrophages regulate metastasis, these findings raise the possibility that clusterin promotes the secretion of cytokines in macrophages in addition to MMP-9. Here, we demonstrate that clusterin upregulates the expressions of chemotactic cytokines, that is, monocyte chemotactic protein-1 (MCP-1), macrophage inflammatory protein-1β (MIP-1β), regulated upon activation, normal T cell expressed and secreted (RANTES), and tumor necrosis factor-α (TNF-α) in Raw264.7 macrophages. In particular, clusterin stimulated TNF-α secretion via the activations of ERK, JNK, and PI3K/Akt pathways in a time and dose-dependent manner. Furthermore, clusterin-induced TNF-α secretion was found to play a critical role in the chemotactic migration of Raw264.7 macrophages. It was also found that clusterin acts directly as a chemoattractant for macrophages. Together, these results suggest that clusterin stimulates the expression and secretion of TNF-α, which plays a critical role in promoting macrophage chemotaxis, via ERK, JNK, and PI3K/Akt pathways. Collectively, these findings describe a novel function for clusterin as an inducer of TNF-α in macrophages and their chemotactic migration, and suggest that clusterin has a tumor-promoting effect.
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Affiliation(s)
- Young-Jun Shim
- Department of Pharmacology, College of Medicine, Korea University, Seoul, Republic of Korea
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Lee YN, Shim YJ, Kang BH, Park JJ, Min BH. Over-expression of human clusterin increases stress resistance and extends lifespan in Drosophila melanogaster. Biochem Biophys Res Commun 2012; 420:851-6. [PMID: 22465014 DOI: 10.1016/j.bbrc.2012.03.087] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Accepted: 03/16/2012] [Indexed: 10/28/2022]
Abstract
Clusterin is a disulfide-linked heterodimeric glycoprotein that has been implicated in a variety of biological processes. Its expression has been shown to be elevated during cellular senescence and normal aging, but it is uncertain whether clusterin protects against aging or whether its expression is a consequence of aging. To investigate the functions of clusterin during organismal aging, we established transgenic Drosophila alleles to induce the expression of the secretory form of human clusterin (hClu(S)) using the Gal4/UAS system. hClu(S) protein (~60 kDa) was detected in both adult homogenates and larval hemolymphs of flies ubiquitously overexpressing hClu(S) (da-Gal4>UAS-hClu(S)) and in motoneurons (D42-Gal4>UAS-hClu(S)). Interestingly, the mean lifespans of these hClu(S)-overexpressing flies were significantly greater than those of control flies that exhibited no hClu(S) induction. hClu(S)-overexpressing flies also showed significantly greater tolerance to heat shock, wet starvation, and oxidative stress. Furthermore, amounts of reactive oxygen species (ROS) in whole bodies were significantly lower in hClu(S)-overexpressing flies. In addition, clusterin was found to prevent the inactivation of glutamine synthetase (GS) by metal-catalyzed oxidation (MCO) in vitro, and this protection was only supported by thiol-reducing equivalents, such as, DTT or GSH, and not by ascorbate (a non-thiol MCO system). Furthermore, this protection against GS inactivation by clusterin was abolished by reacting clusterin with N-ethylmaleimide, a sulfhydryl group-modifying agent. Taken together, these results suggest that a disulfide-linked form of clusterin functions as an antioxidant protein via its cysteine sulfhydryl groups to reduce ROS levels and delay the organismal aging in fruit flies.
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Affiliation(s)
- Young-Nam Lee
- Department of Pharmacology, College of Medicine, Korea University, 126-1 Anam-Dong 5 Ga, Seongbuk-Gu, Seoul 136-705, Republic of Korea
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Abstract
OBJECTIVE To compare the effects of sodium lauryl sulfate (SLS)-free and SLS-containing dentifrice in patient with recurrent aphthous stomatitis (RAS). MATERIALS AND METHODS The design of this study was a double-blind crossover trial. The 90 subjects were divided into three groups: group I used SLS-free (a commercially available SLS-free dentifrice) and SLS-A (SLS-free + 1.5% SLS), group II used SLS-A and SLS-B (a commercially available 1.5% SLS-containing dentifrice), and group III used SLS-free and SLS-B. The subjects used one of the two assigned dentifrices for 8 weeks and then the other for the following 8 weeks. The order of the dentifrices used was selected at random, and there was a 2-week washout period between the two phases. The clinical parameters (number of ulcers, number of episodes, duration of ulcers, mean pain score) were compared between the two phases for each group. RESULTS The number of ulcers and episodes did not differ significantly between SLS-A, SLS-B, and SLS-free. Only duration of ulcers and mean pain score was significantly decreased during the period using SLS-free. CONCLUSION Although SLS-free did not reduce the number of ulcers and episodes, it affected the ulcer-healing process and reduces pain in daily lives in patients with RAS.
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Affiliation(s)
- Y J Shim
- TMJ and Orofacial Pain Clinic, Department of Oral Diagnosis & Oral Medicine, College of Dentistry, Yonsei University, Seodaemun-gu, Seoul, Korea
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Shim YJ, Kang BH, Jeon HS, Park IS, Lee KU, Lee IK, Park GH, Lee KM, Schedin P, Min BH. Clusterin induces matrix metalloproteinase-9 expression via ERK1/2 and PI3K/Akt/NF-κB pathways in monocytes/macrophages. J Leukoc Biol 2011; 90:761-9. [DOI: 10.1189/jlb.0311110] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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Lee S, Hong SW, Min BH, Shim YJ, Lee KU, Lee IK, Bendayan M, Aronow BJ, Park IS. Essential role of clusterin in pancreas regeneration. Dev Dyn 2011; 240:605-15. [PMID: 21290478 DOI: 10.1002/dvdy.22556] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/23/2010] [Indexed: 02/01/2023] Open
Abstract
Based on our previous observations that clusterin induction accompanies pancreas regeneration in the rat, we sought to determine if regeneration might be impaired in mice that lacked clusterin. We studied the impact of absent clusterin on morphogenic and functional features of regenerating pancreas. Clusterin induction was accompanied in the regenerating pancreas by a robust development of new lobules with ductules, acini, and endocrine islets in wild type after partial pancreatectomy. In clusterin knock-out mice, however, pancreatectomy resulted in a poor formation of regenerating lobule. In particular, regeneration of beta-cells was also significantly reduced and was associated with persistent hyperglycemia. Duct cells obtained from pancreatectomized clusterin knock-out mice exhibited impaired beta-cell formation in vitro; this was restored by administration of exogenous clusterin. We suggest that clusterin plays a critical role to promote both exocrine and endocrine regeneration following pancreas injury, as well as for in vitro beta-cell regeneration.
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Sonn CH, Yu YB, Hong YJ, Shim YJ, Bluestone JA, Min BH, Lee KM. Clusterin synergizes with IL-2 for the expansion and IFN-γ production of natural killer cells. J Leukoc Biol 2010; 88:955-63. [PMID: 20729304 DOI: 10.1189/jlb.0310157] [Citation(s) in RCA: 8] [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] [Indexed: 12/11/2022] Open
Abstract
CLU is a secreted, multifunctional protein implicated in several immunologic and pathologic conditions. As the level of serum CLU was shown to be elevated during inflammatory responses, we questioned if CLU might interact with circulating lymphocytes leading to functional consequences. To assess this possibility directly, mouse splenocytes and purified NK cells were cultured with varying dose of CLU, and its effect on cell proliferation was examined. Our data showed that CLU up-regulated DNA synthesis and expansion of NK cells significantly in response to a suboptimal, but not maximal, dose of IL-2, and CLU alone did not exhibit such effects. This CLU-mediated synergy required the co-presence of CLU at the onset of IL-2 stimulation and needed a continuous presence during the rest of the culture. Importantly, NK cells stimulated with CLU showed increased formation of cell clusters and a CD69 activation receptor, representing a higher cellular activation status compared with those from the control group. Furthermore, these NK cells displayed elevated IFN-γ production upon RMA/S tumor target exposures, implying that CLU regulates not only NK cell expansion but also effector function of NK cells. Collectively, our data present a previously unrecognized function of CLU as a novel regulator of NK cells via providing costimulation required for cell proliferation and IFN-γ secretion. Therefore, the role of CLU on NK cells should be taken into consideration for the previously observed, diverse functions of CLU in chronic inflammatory and autoimmune conditions.
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Affiliation(s)
- Chung Hee Sonn
- Korea University College of Medicine, 126-1 Anam-dong 5-ga, Seongbuk-gu, Seoul, Korea
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Kim YH, Shim YJ, Shin YJ, Sul D, Lee E, Min BH. 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) induces calcium influx through T-type calcium channel and enhances lysosomal exocytosis and insulin secretion in INS-1 cells. Int J Toxicol 2009; 28:151-61. [PMID: 19546254 DOI: 10.1177/1091581809336885] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) has been associated with diabetes in several epidemiological studies. However, the diabetogenic action of TCDD on pancreatic cells is unclear. Here, we investigated the direct toxic effects of TCDD on a rat insulin-secreting beta cell line. We found that TCDD enhances exocytosis of MTT formazan and lysosomal proteins such as beta-hexosaminindase and Lamp-1. This TCDD-induced exocytosis was abrogated by T-type calcium channel blockers (mibefradil, flunarizine) but not by an aryl hydrocarbon receptor antagonist (alpha-naphtoflavone). Indeed, cytosolic calcium levels were increased by TCDD. Furthermore, TCDD stimulated insulin secretion, which was inhibited by flunarizine. Taken together, our results suggest that TCDD-induced calcium influx via T-type channels regulates vesicular trafficking, such as lysosomal and secretory granule exocytosis, and that TCDD might exert adverse effects on beta cells by continuous insulin release followed by beta cell exhaustion. This could contribute to the link between TCDD exposure and the risk of developing diabetes.
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Affiliation(s)
- Youn-Hee Kim
- Department of Pharmacology, Korea University College of Medicine, 126-1, 5-Ga Anam-Dong, Sungbuk-Gu, Seoul, Korea
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Park H, Lee JB, Shim YJ, Shin YJ, Jeong SY, Oh J, Park GH, Lee KH, Min BH. Arginine deiminase enhances MCF-7 cell radiosensitivity by inducing changes in the expression of cell cycle-related proteins. Mol Cells 2008; 25:305-11. [PMID: 18414006] [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: 05/26/2023] Open
Abstract
After successful clinical application, arginine deiminase (ADI) has been proposed to be a new cancer therapeutic. In the present study, we examined the effect of ADI in combination with ionizing radiation (IR) on MCF-7 cell growth and clonogenic cell death. Cell growth was inhibited by IR in a dose-dependent manner and ADI enhanced the radiosensitivity. ADI itself did not suppress the growth of MCF-7 cells due to the high level of expression of argininosuccinate synthetase (ASS), which convert citrulline, a product of arginine degradation by ADI, to arginine. Previously, it was suggested that ammonia, another product of arginine degradation by ADI, is the main cause of the growth inhibition of irradiated hepatoma cells contaminated with ADI-expressing mycoplasma [van Rijn et al. (2003)]. However, we found that ammonia is not the only factor that enhances radiosensitivity, as enhancement was also observed in the absence of ammonia. In order to identify the enhancing effect, levels of ASS and proteins related to the cell cycle were examined. ASS was unchanged by ADI plus IR, but p21 (a CDK inhibitor) was upregulated and c-Myc downregulated. These findings indicate that changes in the expressions of cell cycle proteins are involved in the enhancement of radiosensitivity by ADI. We suggest that ADI is a potential adjunct to cancer therapy.
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Affiliation(s)
- Hwan Park
- Department of Pharmacology and BK21 Program for Medical Sciences, College of Medicine, Korea University, Seoul 136-705, Korea
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Yoon CY, Shim YJ, Kim EH, Lee JH, Won NH, Kim JH, Park IS, Yoon DK, Min BH. Renal cell carcinoma does not express argininosuccinate synthetase and is highly sensitive to arginine deprivation via arginine deiminase. Int J Cancer 2007; 120:897-905. [PMID: 17096330 DOI: 10.1002/ijc.22322] [Citation(s) in RCA: 122] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Recently, pegylated arginine deiminase (ADI; EC 3.5.3.6) has been used to treat the patients with hepatocellular carcinoma or melanoma, in which the level of argininosuccinate synthetase (ASS) activity is low or undetectable. The efficacy of its antitumor activity largely depends on the level of intracellular ASS, which enables tumor cells to recycle citrulline to arginine. Thus, we examined the expression levels of ASS in various cancer cells and found that it is low in renal cell carcinoma (RCC) cells, rendering the cells highly sensitive to arginine deprivation by ADI treatment. Immunohistochemical analysis revealed that in biopsy specimens from RCC patients (n = 98), the expression of ASS is highly demonstrated in the epithelium of normal proximal tubule but not seen in tumor cells. Furthermore, RCC cells treated with ADI showed remarkable growth retardation in a dose dependent manner. ADI also exerted in vivo antiproliferative effect on the allografted renal cell carcinoma (RENCA) tumor cells and prolonged the survival of tumor-bearing mice. Histological examination of the tumors revealed that tumor angiogenesis and vascular endothelial growth factor (VEGF) expression were significantly diminished by ADI administration. Therefore, these findings suggest that arginine deprivation by ADI could provide a beneficial strategy for the treatment of RCC in ways of inhibitions of arginine availability and neovascularization.
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Affiliation(s)
- Cheol-Yong Yoon
- Department of Urology, College of Medicine, Korea University, Seoul 136-705, Korea
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Shin YJ, Kang SW, Jeong SY, Shim YJ, Kim YH, Kim BM, Kee SH, Park JJ, Park IS, Min BH. Clusterin enhances proliferation of primary astrocytes through extracellular signal-regulated kinase activation. Neuroreport 2007; 17:1871-5. [PMID: 17179861 DOI: 10.1097/wnr.0b013e328010ac99] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [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: 10/23/2022]
Abstract
Clusterin, a secretory glycoprotein, has been shown to be up-regulated in the reactive astrocytes in response to brain injury and neurodegenerative diseases, but its function has not been clearly elucidated. In this study, we investigate whether clusterin has growth-stimulatory activity in astrocytes. Suppression of clusterin with antisense oligonucleotide induced growth arrest, whereas transient overexpression of clusterin by cDNA transfection or exogenous treatment with purified clusterin promoted proliferation of the primary astrocytes in culture. This clusterin-stimulated proliferation was abrogated by PD98059, an inhibitor of mitogen-activated protein kinase kinase. These results suggest that clusterin might play an important role in astrogliosis by stimulating the proliferation of astrocytes through activation of the extracellular signal-regulated kinase 1/2 signaling pathway.
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Affiliation(s)
- Yong-Jae Shin
- Department of Pharmacology and BK21 Program for Medical Sciences, College of Medicine, Korea University, Seoul, Korea
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Kim ES, Kim JW, Kim YT, Kim SY, Ko YS, Shim YJ, Chung EJ, Lee‐Kim YC. Serum Phospholipid‐Fatty Acid Patterns and Antioxidant Status in Cervical Cancer Patients. FASEB J 2006. [DOI: 10.1096/fasebj.20.4.a152-c] [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: 11/11/2022]
Affiliation(s)
| | - JW Kim
- Dept Obstetrics and Gynecology
| | - YT Kim
- Dept Obstetrics and Gynecology
| | - SY Kim
- Res Inst of Food & Nutr SciYonsei Univ134 ShinchondongSeoul120‐749Korea, Republic of
| | - YS Ko
- Res Inst of Food & Nutr SciYonsei Univ134 ShinchondongSeoul120‐749Korea, Republic of
| | - YJ Shim
- Res Inst of Food & Nutr SciYonsei Univ134 ShinchondongSeoul120‐749Korea, Republic of
| | - EJ Chung
- Dept of General EduKangnam UnivYonginKyunggido449‐702Korea, Republic of
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Kang SW, Shin YJ, Shim YJ, Jeong SY, Park IS, Min BH. Clusterin interacts with SCLIP (SCG10-like protein) and promotes neurite outgrowth of PC12 cells. Exp Cell Res 2005; 309:305-15. [PMID: 16038898 DOI: 10.1016/j.yexcr.2005.06.012] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2004] [Revised: 06/10/2005] [Accepted: 06/20/2005] [Indexed: 11/25/2022]
Abstract
Clusterin has been known as a chaperone-like molecule capable of interacting with various proteins. In this study, we show that clusterin interacts with the microtubule-destabilizing stathmin family protein SCLIP by GST pull-down and co-immunoprecipitation assays. Interestingly, SCLIP interacts with 80 kDa mature form of clusterin in the cytosolic fraction of PC12 cells permeabilized by low concentration of a weak nonionic detergent digitonin, but not with intracellular variants of clusterin known as binding isoforms of Ku70 or TGF-beta receptors. Both clusterin and SCLIP are co-localized at the perinuclear region and growth cone of PC12 cells. In addition, we show that the minimal domains for the interaction are mapped to the C-terminal valine-rich region (367-447) of clusterin and the N-terminal palmitoylation and membrane attachment site (1-34) of SCLIP. Finally, we demonstrate that ectopic expression of clusterin in PC12 cells elongates neurite-formation triggered by NGF and induces spontaneous neurite outgrowth even in the absence of NGF. Taken together, these results suggest that the clusterin interacts with SCLIP and the interaction may act as an important modulator during neuronal differentiation.
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Affiliation(s)
- Sang-Wook Kang
- Department of Pharmacology and BK21 Program for Medical Sciences, College of Medicine, Korea University, 126-1 Anam-dong 5-Ga, Sungbuk-Gu, Seoul 136-705, Korea
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Shim YJ, Doo HK, Ahn SY, Kim YS, Seong JK, Park IS, Min BH. Inhibitory effect of aqueous extract from the gall of Rhus chinensis on alpha-glucosidase activity and postprandial blood glucose. J Ethnopharmacol 2003; 85:283-287. [PMID: 12639753 DOI: 10.1016/s0378-8741(02)00370-7] [Citation(s) in RCA: 127] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The present study examined the inhibitory effect of aqueous extract from the gall of Rhus chinensis (AEGRC) on alpha-glucosidase activity, an enzyme responsible for digestion of carbohydrate to monosaccharides in the process of intestinal absorption. AEGRC inhibited Bacillus alpha-glucosidase acitvity with an IC(50) of 0.9 micro g/ml. Its inhibition on alpha-glucosidase was determined to be noncompetitive and reversible when the enzyme-substrate mixture was simultaneously treated with AEGRC as an inhibitor. In addition, when it was orally administered to rats with sucrose (2g/kg), AEGRC (250-1000mg/kg) significantly suppressed the increase of blood glucose levels after sucrose loading in a dose dependent manner. These results suggest that AEGRC might exert anti-diabetic effect by suppressing carbohydrate absorption from intestine, and thereby reducing the postprandial increase of blood glucose.
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Affiliation(s)
- Young-Jun Shim
- Department of Pharmacology & BK21 Program for Medical Sciences, College of Medicine, Korea University, 136-705, Seoul, South Korea
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Lee SH, Kim CS, Kim HN, Kim LS, Huh MJ, Cho TH, Shim YJ. Satisfaction with the cochlear implant of pre- and postlingually deaf adults. Adv Otorhinolaryngol 2002; 57:273-6. [PMID: 11892166 DOI: 10.1159/000059121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- S H Lee
- Department of Otorhinolaryngology, College of Medicine, Kyungpook National University, Taegu, Korea.
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Affiliation(s)
- H N Kim
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea.
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Shim YJ, Kim HN, Park K. A modified hearing aid fitting procedure using both real ear and 2cc coupler measurement system. Yonsei Med J 1997; 38:202-5. [PMID: 9339127 DOI: 10.3349/ymj.1997.38.4.202] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
In order to reduce the test time in real ear hearing-aid fitting for children, the validity of applying the average real ear to coupler differences (RECDs) in prefitting procedure using a 2cc coupler measurement system was evaluated by checking whether the majority of people's RECDs might occur within 5 dB of the average RECDs (N = 116) in each test frequency and age group. The percentages of occurrence were around 90% in test subjects' RECDs in saturation sound pressure levels (SSPLs) and around 70% in gain in each important test frequency. Appropriate test frequencies in prefitting are 500, 1000, 1500 and 2000 Hz.
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Affiliation(s)
- Y J Shim
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
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Kim HN, Shim YJ, Lee HK. Speech discrimination scores according to the number of active electrodes in SPEAK speech processing strategy. Adv Otorhinolaryngol 1997; 52:218-9. [PMID: 9042490 DOI: 10.1159/000058993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- H N Kim
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea
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Shim YJ, Kim HN, Chang MS. Effects of hearing aid use on communication ability in prelingually deafened children under 4 years of age. Adv Otorhinolaryngol 1997; 52:302-4. [PMID: 9042512 DOI: 10.1159/000059026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Y J Shim
- Department of Otorhinolaryngology, Yonsei University, College of Medicine, Seoul, Korea
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Kim HN, Shim YJ, Chung MH, Chang MS, Choi HS. Comparison of speech discrimination scores between SPEAK and MPEAK speech-processing strategies. Adv Otorhinolaryngol 1997; 52:110-2. [PMID: 9042464 DOI: 10.1159/000058957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- H N Kim
- Department of Otorhinolaryngology, Yonsei University, College of Medicine Seoul, Korea
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Kim HN, Chung MH, Shim YJ, Yoon JS. Aided versus implanted speech recognition abilities in severe to profound postlingual deafness. Ann Otol Rhinol Laryngol Suppl 1995; 166:153-4. [PMID: 7668612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- H N Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Yonsei University, College of Medicine, Seoul, Korea
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Kim HN, Shim YJ, Kim KM, Chang MS, Lee EH. Social performance ability in multichannel cochlear implantees. Ann Otol Rhinol Laryngol Suppl 1995; 166:243-5. [PMID: 7668654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- H N Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Yonsei University, College of Medicine, Seoul, Korea
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Kim HN, Shim YJ, Kim YM, Cho GJ, Moon SK. Comparison of speech recognition ability with different speech processing strategies by Korean cochlear implantees. Ann Otol Rhinol Laryngol 1992; 101:659-64. [PMID: 1497271 DOI: 10.1177/000348949210100806] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 12/27/2022]
Abstract
Many variables affect the audiologic performance of cochlear implantees. With current methods of evaluation, it is difficult to directly compare auditory function with different speech coding strategies. We compared the audiologic performance directly with F0F1F2 and multipeak speech coding strategies in the same implanted ear of eight Korean cochlear implantees. We tested word and phoneme recognition abilities using Korean word lists for speech audiometry and two-syllable nonsense words, respectively. With the multipeak coding strategy, a significant difference in discrimination ability was found in the initial fricative consonant phonemes (/s/,/ss/,/h/). Our results suggest that the improvement of speech recognition ability with the multipeak coding strategy comes primarily from the better understanding of the initial fricative consonants.
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Affiliation(s)
- H N Kim
- Department of Otorhinolaryngology, Yonsie University College of Medicine, Seoul, Korea
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Park IY, Shim YJ, Kim HN, Kim YM. Test-retest differences and assistive function in detecting conductive hearing loss of impedance audiometry. Yonsei Med J 1988; 29:124-8. [PMID: 3218255 DOI: 10.3349/ymj.1988.29.2.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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