601
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Moon EJ, Lee YM, Lee OH, Lee MJ, Lee SK, Chung MH, Park YI, Sung CK, Choi JS, Kim KW. A novel angiogenic factor derived from Aloe vera gel: beta-sitosterol, a plant sterol. Angiogenesis 2003. [PMID: 14517429 DOI: 10.1023/a: 1009058232389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Aloe vera gel has a beneficial effect on wound healing. Because angiogenesis is an essential process in wound healing, we hypothesized that Aloe vera gel might contain potent angiogenic compounds. Here we demonstrate that Aloe vera gel and its extracts are angiogenic on the chorioallantoic membrane (CAM) of chick embryo. Out of the three compounds purified from the final fraction of Aloe vera gel, beta-sitosterol showed a potent angiogenic activity in the CAM assay. In the presence of heparin, beta-sitosterol stimulated neovascularization in the mouse Matrigel plug assay and the motility of human umbilical vein endothelial cells in an in vitro wound migration assay. Thus beta-sitosterol is a novel plant-derived angiogenic factor which may have potential pharmaceutical applications for the management of chronic wounds.
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602
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Nguyen TTT, Tran E, Ong CK, Lee SK, Do PT, Huynh TT, Nguyen TH, Lee JJ, Tan Y, Ong CS, Huynh H. Kaempferol-induced growth inhibition and apoptosis in A549 lung cancer cells is mediated by activation of MEK-MAPK. J Cell Physiol 2003; 197:110-21. [PMID: 12942547 DOI: 10.1002/jcp.10340] [Citation(s) in RCA: 122] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A vast variety of naturally occurring substances have been shown to protect against experimental carcinogenesis and an increasing amount of evidence suggests that kaempferol may have cancer chemopreventative properties. However, the precise underlying protective mechanisms are poorly understood. To elucidate these mechanisms, we challenged human lung cancer cell line A549 with kaempferol and investigated its effects upon cellular growth and signal transduction pathways. Treatment of A549 cells with kaempferol resulted in a dose- and time-dependent reduction in cell viability and DNA synthesis with the rate of apoptosis equivalent to 0.9+/-0.5, 5.2+/-1.5, 16.8+/-2.0, 25.4+/-2.6, and 37.8+/-4.5% on treatment with 0, 17.5, 35.0, 52.5, and 70.0 microM kaempferol, respectively. Concomitantly, kaempferol treatments led to a 1.2-, 2.7-, 3.3-, and 3.4-fold increase in Bax. Similar elevations were also observed in Bad which increased 1.2-, 3.3-, 3.7-, and 4.7-fold, respectively, as compared to control. Bcl-2 and Bcl-xL expression were inhibited in a dose-dependent fashion. While the Akt-1 and phosphorylated Akt-1 were inhibited, the mitogen-activated protein kinase (MAPK) was activated upon kaempferol treatment. Kaempferol induced apoptosis was associated with the cleavage of caspase-7 and poly ADP-ribose polymerase (PARP). Inhibition of MEK1/2 but not PI-3 kinase blocked kaempferol-induced cleavage of caspase-7, PARP cleavage, and apoptosis. The results suggest that inactivation of Akt-1 and alteration of Bcl-2 family of proteins are not sufficient for kaempferol to induce apoptosis and activation of MEK-MAPK is a requirement for kaempferol-induced cell death machinery in A549 cells.
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603
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Lee SK, Yun CH, Oh JB, Nam HW, Jung SW, Paeng JC, Lee DS, Chung CK, Choe G. Intracranial ictal onset zone in nonlesional lateral temporal lobe epilepsy on scalp ictal EEG. Neurology 2003. [PMID: 14504317 DOI: 10.1212/01.wnl.0000086377.94037.80.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To determine the ictal focus and the role of seizure characteristics, fluorodeoxyglucose (FDG) PET, and subtraction ictal SPECT in patients diagnosed as having nonlesional lateral temporal lobe epilepsy by long-term scalp video-EEG monitoring. METHODS The authors studied 33 consecutive patients with nonlesional neocortical epilepsy who had a scalp ictal onset zone localized in the temporal lobe and good surgical outcome after focal neocortical resection. All patients were evaluated using intracranial recordings prior to resection. Semiology, FDG-PET, and ictal-interictal subtraction SPECT were used to verify the diagnostic role of these methods in the localization of epileptic foci. RESULTS The ictal onset zones, confirmed by intracranial study, were the lateral temporal (22 patients), parietal (5), frontal (3), temporoparietal (2), and occipital (1) areas. FDG-PET analyzed by statistical parametric mapping correctly localized the epileptogenic lobe in 18 of 33 patients and subtraction ictal SPECT correctly localized it in 13 of 25 patients. However, in patients with extratemporal ictal onset zones, FDG-PET and ictal SPECT in combination correctly localized the epileptogenic lobe in only 3 of 11 cases. CONCLUSIONS An extratemporal ictal onset zone was encountered in patients with nonlesional lateral temporal lobe seizures based on scalp video-EEG monitoring. FDG-PET and subtraction SPECT had localizing value in no more than half of patients.
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604
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Lee SK, Yun CH, Oh JB, Nam HW, Jung SW, Paeng JC, Lee DS, Chung CK, Choe G. Intracranial ictal onset zone in nonlesional lateral temporal lobe epilepsy on scalp ictal EEG. Neurology 2003; 61:757-64. [PMID: 14504317 DOI: 10.1212/01.wnl.0000086377.94037.80] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To determine the ictal focus and the role of seizure characteristics, fluorodeoxyglucose (FDG) PET, and subtraction ictal SPECT in patients diagnosed as having nonlesional lateral temporal lobe epilepsy by long-term scalp video-EEG monitoring. METHODS The authors studied 33 consecutive patients with nonlesional neocortical epilepsy who had a scalp ictal onset zone localized in the temporal lobe and good surgical outcome after focal neocortical resection. All patients were evaluated using intracranial recordings prior to resection. Semiology, FDG-PET, and ictal-interictal subtraction SPECT were used to verify the diagnostic role of these methods in the localization of epileptic foci. RESULTS The ictal onset zones, confirmed by intracranial study, were the lateral temporal (22 patients), parietal (5), frontal (3), temporoparietal (2), and occipital (1) areas. FDG-PET analyzed by statistical parametric mapping correctly localized the epileptogenic lobe in 18 of 33 patients and subtraction ictal SPECT correctly localized it in 13 of 25 patients. However, in patients with extratemporal ictal onset zones, FDG-PET and ictal SPECT in combination correctly localized the epileptogenic lobe in only 3 of 11 cases. CONCLUSIONS An extratemporal ictal onset zone was encountered in patients with nonlesional lateral temporal lobe seizures based on scalp video-EEG monitoring. FDG-PET and subtraction SPECT had localizing value in no more than half of patients.
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MESH Headings
- Adult
- Anterior Temporal Lobectomy
- Electroencephalography
- Epilepsies, Partial/diagnostic imaging
- Epilepsies, Partial/physiopathology
- Epilepsies, Partial/surgery
- Epilepsy, Frontal Lobe/diagnostic imaging
- Epilepsy, Frontal Lobe/physiopathology
- Epilepsy, Frontal Lobe/surgery
- Epilepsy, Temporal Lobe/diagnostic imaging
- Epilepsy, Temporal Lobe/physiopathology
- Epilepsy, Temporal Lobe/surgery
- Female
- Fluorodeoxyglucose F18
- Frontal Lobe/diagnostic imaging
- Frontal Lobe/physiopathology
- Humans
- Magnetic Resonance Imaging
- Male
- Occipital Lobe/diagnostic imaging
- Occipital Lobe/physiopathology
- Parietal Lobe/diagnostic imaging
- Parietal Lobe/physiopathology
- Single-Blind Method
- Subtraction Technique
- Temporal Lobe/diagnostic imaging
- Temporal Lobe/physiopathology
- Tomography, Emission-Computed
- Tomography, Emission-Computed, Single-Photon
- Treatment Outcome
- Video Recording
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605
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Kim BS, Lee SK, terBrugge KG. Endovascular treatment of congenital arteriovenous fistulae of the internal maxillary artery. Neuroradiology 2003; 45:445-50. [PMID: 12783143 DOI: 10.1007/s00234-003-0967-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2002] [Accepted: 02/04/2003] [Indexed: 11/29/2022]
Abstract
Congenital arteriovenous fistulae (AVF) of the internal maxillary artery (IMA) are rare. We present the angiographic findings and management of six AVF of the IMA, selected from 147 patients with facial vascular malformations. The fistula was thought to be congenital in all six in view of a life-long history, with no recorded trauma. Our analysis included angioarchitecture, treatment modality, embolic material, treatment results and follow-up. All patients had angiography showing an AVF originating from the IMA and draining to the jugular vein. Five patients underwent endovascular treatment with detachable balloons; a combination of Guglielmi detachable coils and N-acetyl-2-cyanoacrylate (NBCA) was used in one child. We successfully closed the AVF in all cases, without procedure-related complications, except for delayed transient facial numbness in one patient. No recurrence was observed on follow-up of 5 months to 7 years (mean 44 months).
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606
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Kim SS, Oh OJ, Min HY, Park EJ, Kim Y, Park HJ, Nam Han Y, Lee SK. Eugenol suppresses cyclooxygenase-2 expression in lipopolysaccharide-stimulated mouse macrophage RAW264.7 cells. Life Sci 2003; 73:337-48. [PMID: 12757841 DOI: 10.1016/s0024-3205(03)00288-1] [Citation(s) in RCA: 147] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Inducible cyclooxygenase (COX-2) has been implicated in the processes of inflammation and carcinogenesis. Thus, the potential COX-2 inhibitors have been considered as anti-inflammatory or cancer chemopreventive agents. In this study, the methanolic extract of the cortex of Eugenia caryophyllata Thunberg (Myrtaceae) was found to potently inhibit the prostaglandin E(2) production in lipopolysaccharide (LPS)-activated mouse macrophage RAW264.7 cells (98.3% inhibition at the test concentration of 10 microg/ml). Further, hexane-soluble layer was the most active partition compared to ethyl acetate, n-butanol, and water-soluble parts. By bioassay-guided fractionation of hexane-soluble partition, eugenol was isolated and exhibited a significant inhibition of PGE(2) production (IC(50) = 0.37 microM). In addition, eugenol suppressed the cyclooxygenase-2 (COX-2) gene expression in LPS-stimulated mouse macrophage cells. On the line of COX-2 playing an important role in colon carcinogenesis further study was designed to investigate the effect of eugenol on the growth and COX-2 expression in HT-29 human colon cancer cells. Eugenol inhibited the proliferation of HT-29 cells and the mRNA expression of COX-2, but not COX-1. This result suggests that eugenol might be a plausible lead candidate for further developing the COX-2 inhibitor as an anti-inflammatory or cancer chemopreventive agent.
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607
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Kim S, Min SY, Lee SK, Cho WJ. Comparative molecular field analysis study of stilbene derivatives active against A549 lung carcinoma. Chem Pharm Bull (Tokyo) 2003; 51:516-21. [PMID: 12736450 DOI: 10.1248/cpb.51.516] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A series of 43 stilbene derivatives that showed cytotoxicity against human lung carcinoma (A549) was analyzed using comparative molecular field analysis (CoMFA) for defining the hypothetic pharmacophore model. The polyoxylated stilbenes were found to be active inhibitors of tubulin polymerization. Several cis-stilbenes are structurally similar to combretastatins. However, the trans-stilbenes are assumed to be close to resveratrol found in grapes and have been reported to be potential cancer chemopreventive agents by modulating the initiation, promotion, and progression of the carcinogenic process. With several synthesized compounds that were evaluated for antitumor cytotoxicity against human lung tumor cells (A549), the stilbene derivatives were subjected to CoMFA. To perform systematic molecular modeling of these compounds, a conformational search was carried out based on the precise dihedral angle analysis of the lead compound (1p). The X-ray crystallographic structure of combretastatin A-1 was also used for defining the active conformers of the compounds. After determining the energy-minimized conformers of the lead compound (1p), CoMFA was performed using five different alignments. The three dimensional (3D)-quantitative structure-activity relationship study resulted in reasonable cross-validated, conventional r(2) values equal to 0.640 and 0.958, respectively.
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608
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Lee CH, Suh CH, Lee J, Kim YT, Lee SK. The effects of anti-idiotypic antibody on antibody production and apoptosis of anti-dsDNA antibody producing cells. Clin Exp Rheumatol 2003; 21:291-300. [PMID: 12846046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
OBJECTIVE Systemic lupus erythematosus is an autoimmune disease characterized by the production of anti-dsDNA antibody. Because the titer of anti-dsDNA antibody is correlated with disease severity, especially in lupus nephritis, controlling anti-dsDNA antibody production is important in the treatment of SLE. There are many regulatory mechanisms of autoantibody production; one of these is the interaction between idiotype and anti-idiotype antibody (anti-Id). The purpose of the present study was to assess the effect of anti-Id on anti-dsDNA antibody production and apoptosis and to study the mechanism of anti-Id induced apoptosis. METHODS After anti-dsDNA antibody producing hybridomas were treated with anti-Id, we checked the amount of anti-dsDNA antibody production, the rate of transcription, cellular proliferation, and apoptosis. Also, after treatment with anti-oxidant (N-acetyl-Lcysteine), phorbol esters with calcium ionophore and corticosteroids, we compared their effect on apoptosis with anti-Id. RESULTS Two types of anti-dsDNA antibody producing hybridomas (G1-2, gamma and kappa chains; M2-10, mu and kappa chains) were treated with anti-Id and it was found that: (1) the amount of anti-dsDNA antibody production decreased; (2) the rate of transcription and cellular proliferation did not decrease; and (3) the level of apoptosis increased. The two cells expressed Fas and Fas-ligand, and the Fas of G1-2 was functional but that of M2-10 was not. The treatment of these cells with anti-Id resulted in no change in Fas-ligand and Bax expression, but the expression of Bcl-2 was decreased. In addition, treatment with antioxidant (N-acetyl-L-cysteine) inhibited anti-Id-induced apoptosis in G1-2 and M2-10. Phorbol esters with calcium ionophore also inhibited anti-Id induced apoptosis in M2-10. Corticosteroids induced apoptosis in both cells and showed similar results with anti-Id induced apoptosis. CONCLUSION The anti-Id suppressed the production of anti-dsDNA antibody in two cells by inducing apoptosis, as did prednisolone. Furthermore, Bcl-2, oxygen-free radicals and protein kinase C might be involved in the induction of apoptosis by anti-Id.
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609
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Shin JY, Lee SK, Kang CD, Chung JS, Lee EY, Seo SY, Lee SY, Baek SY, Kim BS, Kim JB, Yoon S. Antitumor effect of intratumoral administration of dendritic cell combination with vincristine chemotherapy in a murine fibrosarcoma model. Histol Histopathol 2003; 18:435-47. [PMID: 12647794 DOI: 10.14670/hh-18.435] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new antitumor therapeutic strategy utilizing the combined effect of chemotherapy and DC (dendritic cell)-based immunotherapy was designed, and the effect of intratumoral injections of unpulsed, immature DCs was evaluated after in vivo pretreatment of vincristine on tumor growth in a murine fibrosarcoma tumor model. Vincristine exerted a much more potent apoptosis/necrosis-inducing effect on MCA-102 tumor cells than on DCs both in vitro and in vivo. Moreover, CD11c, CD40, CD80 and CD86 molecules on DCs were not downregulated after treatment with vincristine either in vitro or in vivo. The growth of tumor significantly regressed in the group which received the combined vincristine chemotherapy with intratumoral administration of DCs in contrast to the untreated group, the group treated with DCs alone, and the group treated with vincristine alone. In particular, an upregulated expression of CD40, CD80 and CD86 molecules on DCs was found in the combination treatment group. Furthermore, the number of CD4+ and CD8+ T cells and the staining intensity of their CD4 and CD8 surface molecules also increased after the combination treatment. Therefore, our results indicate the feasibility of this combination therapy with vincristine chemotherapy and DC-based immunotherapy as an efficient antitumor strategy for the treatment of fibrosarcoma.
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610
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Lee SK, Nam KA, Hoe YH, Min HY, Kim EY, Ko H, Song S, Lee T, Kim S. Synthesis and evaluation of cytotoxicity of stilbene analogues. Arch Pharm Res 2003; 26:253-7. [PMID: 12735680 DOI: 10.1007/bf02976951] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Resveratrol analogs were newly synthesized and evaluated for cytotoxicity in cultured human lung and colon cancer cells. 3,5,4-Trimethoxy-trans-stilbene and 3,5,2',4'-tetramethoxy-trans-stilbene were found to be more potent rather than resveratrol. 3,4,5-Trimethoxy-4'-bromo-cis-stilbene was the most active among the test compounds.
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611
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Shin HY, Jeong HJ, Na HJ, Hong SH, Lee SK, Lee KN, Song YS, Kim HM, Shin TY. Daeganghwal-tang inhibits the stem cell factor-induced migration and inflammatory cytokines secretion in mast cells. JOURNAL OF ETHNOPHARMACOLOGY 2003; 85:157-161. [PMID: 12576215 DOI: 10.1016/s0378-8741(02)00369-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Traditional Oriental medicinal prescription, Daeganghwal-tang (DGHT) has been used for the treatment of rheumatoid arthritis (RA) in Korea. However, its effect in experimental models remains unknown. Recent reports suggest that in patients with RA, synovial mast cells increase in number and show signs of activation and inflammatory cytokines secretion. Our results show that stem cell factor (SCF) is a potent chemotactic factor for the mast cells in vitro. The chemotactic response to SCF was blocked by DGHT. When DGHT (1mg/ml) was added, the secretion of tumor necrosis factor (TNF)-alpha, interleukin (IL)-1beta and IL-6 was inhibited by 60.1, 81.8, 72.5%, respectively in phorbol 12-myristate 13-acetate (PMA) plus calcium ionophore A23187-stimulated HMC-1 cells. In addition, the expression of TNF-alpha mRNA in HMC-1 cells was inhibited by DGHT (1mg/ml). These findings indicate that DGHT inhibits SCF-induced migration and PMA plus calcium ionophore-stimulated inflammatory cytokines secretion in mast cells.
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612
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Sung KW, Yoo KH, Chung EH, Jung HL, Koo HH, Shin HJ, Lee SK, Lim DH, Kim DW, Park HK, Cho EJ, Kim SW. Successive double high-dose chemotherapy with peripheral blood stem cell rescue collected during a single leukapheresis round in patients with high-risk pediatric solid tumors: a pilot study in a single center. Bone Marrow Transplant 2003; 31:447-52. [PMID: 12665839 DOI: 10.1038/sj.bmt.1703869] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In total, 18 of 26 double high-dose chemotherapies (HDCT) in pediatric solid tumors were rescued with peripheral blood stem cells collected during a single leukapheresis round (single-harvest group, SHG). In the remaining eight HDCT, additional leukapheresis were necessary after the first HDCT (HDCT1) to rescue the second HDCT (HDCT2) (double-harvest group, DHG). Stem cell collection after HDCT1 was inefficient and delayed in patients who had received prior chemotherapy before HDCT1. The interval between HDCT1 and HDCT2 was shorter in SHG than in DHG (median 62.5 days vs 178.5 days, P-value=0.002). Hematologic recovery in HDCT2 was delayed compared to HDCT1. However, there was no difference in hematologic recovery between SHG and DHG. A high rate of treatment-related mortality (TRM) was recorded during HDCT2, but there was no evidence that the shorter interval caused a higher rate of TRM (P-value=0.454). The probability of disease-free survival at 2 years after HDCT2 in the SHG and DHG were 66.7 and 25.0%, respectively (P-value=0.031). Therefore, to administer the second HDCT earlier in double HDCT, and thus to improve the survival of patients with high-risk solid tumors, the single-harvest approach is recommended rather than the double-harvest approach.
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613
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Lee WY, Lee KW, Heo JS, Choi SH, Kim SJ, Joh JW, Lee SK. Prolongation of pig liver perfusion time by gabexate mesilate continuous infusion in extracorporeal perfusion system using Bio-pump. Transplant Proc 2003; 35:128-9. [PMID: 12591335 DOI: 10.1016/s0041-1345(02)03776-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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614
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Han DJ, Jeong YL, Wee YM, Lee AY, Lee HK, Ha JC, Lee SK, Kim SC. Tautomycetin as a novel immunosuppressant in transplantation. Transplant Proc 2003; 35:547. [PMID: 12591525 DOI: 10.1016/s0041-1345(02)03905-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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615
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Lee KW, Joh JW, Kim SJ, Park JH, Chon SE, Choi SH, Heo JS, Song JH, Kim SM, Peck KR, Kim YI, Lee BB, Lee SK. Living donor liver transplantation using graft infested with clonorchis sinensis: two cases. Transplant Proc 2003; 35:66-7. [PMID: 12591310 DOI: 10.1016/s0041-1345(02)03955-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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616
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Lee KW, Son TS, Joh JW, Kim SJ, Park JH, Chon SE, Choi SH, Heo JS, Kim YI, Lee BB, Lee SK. Perioperative cytokine response after liver transplantation. Transplant Proc 2003; 35:407-8. [PMID: 12591462 DOI: 10.1016/s0041-1345(02)03956-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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617
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Chon SE, Lee KW, Joh JW, Kim SJ, Park JH, Lee SK, Oh HY, Huh WS, Kim YI, Lee BB. Factors affecting the graft survival in cadaver donor kidney transplantation. Transplant Proc 2003; 35:147-8. [PMID: 12591342 DOI: 10.1016/s0041-1345(02)03767-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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618
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Kim SJ, Yang TY, Jeong IK, Lee MK, Choo SW, Lee KW, Joh JW, Lee SK, Lee BB, Kim KW. Retransplantation of islets after simultaneous islet-kidney transplantation: a case report. Transplant Proc 2003; 35:476-8. [PMID: 12591492 DOI: 10.1016/s0041-1345(02)04005-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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619
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Park JH, Noh JH, Lee KW, Lee SK, Kim SJ, Choi SH, Heo JS, Chon SE, Paik SW, Koh KW, Lee JH, Choi MS, Kim YI, Lee BB, Joh JW. Safety of the donor with right hepatic lobectomy in the living donor liver transplantation. Transplant Proc 2003; 35:57-8. [PMID: 12591306 DOI: 10.1016/s0041-1345(02)03949-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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620
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Jeong LS, Yoo SJ, Lee KM, Koo MJ, Choi WJ, Kim HO, Moon HR, Lee MY, Park JG, Lee SK, Chun MW. Design, synthesis, and biological evaluation of fluoroneplanocin A as the novel mechanism-based inhibitor of S-adenosylhomocysteine hydrolase. J Med Chem 2003; 46:201-3. [PMID: 12519056 DOI: 10.1021/jm025557z] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Fluoroneplanocin A (12) was designed as a novel mechanism-based inhibitor of S-adenosylhomocysteine hydrolase (SAH) and efficiently synthesized via an electrophilic vinyl fluorination reaction (n-BuLi, N-fluorobenzenesulfonimide at -78 degrees C). Fluoroneplanocin A exhibited 2-fold more potent SAH inhibitory activity than the parent neplanocin A. A new mechanism of irreversible inhibition discovered in this work might provide new alternatives in the design of a different class of antiviral agents operating via SAH inhibition.
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621
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Chung EJ, Kim MH, Lee SS, Lee SK. Primary vs. secondary common bile duct stones: apples and oranges. Endoscopy 2003; 35:92; author reply 93. [PMID: 12510235 DOI: 10.1055/s-2003-36401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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622
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Chang YW, Kim Han BK, Yoon HK, Lee SK. Multidetector-row CT appearance of acute torsion of wandering spleen in a child. Acta Radiol 2003; 44:107. [PMID: 12631009 DOI: 10.1034/j.1600-0455.2003.00001.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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623
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Lee SK, Nam KA, Heo YH. Cytotoxic activity and G2/M cell cycle arrest mediated by antofine, a phenanthroindolizidine alkaloid isolated from Cynanchum paniculatum. PLANTA MEDICA 2003; 69:21-25. [PMID: 12567274 DOI: 10.1055/s-2003-37021] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Starting with an extract derived from the root of Cynanchum paniculatum Kitagawa (Asclepiadaceae) that was active in the process of inhibiting the growth of human cancer cells in culture, a phenanthroindolizidine alkaloid antofine was isolated and identified as an active principle (IC50 = 7.0 +/- 0.2 ng/ml for A549, human lung cancer cells; IC50 = 8.6 +/- 0.3 ng/ml for Col2, human colon cancer cells). Prompted by the high potency of cancer cell growth inhibition, additional action mechanism studies were performed with antofine. Utilizing cultured Col2 cells as a model, antofine induced arrest in the G2/M phase of the cell cycle after 48 h of incubation. With wash-out experiment, colony formation was also inhibited in a dose-dependent manner. These data suggest the potential of antofine to serve as a cancer chemotherapeutic agent by virtue of arresting the cell cycle.
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624
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Hong CH, Hur SK, Oh OJ, Kim SS, Nam KA, Lee SK. Evaluation of natural products on inhibition of inducible cyclooxygenase (COX-2) and nitric oxide synthase (iNOS) in cultured mouse macrophage cells. JOURNAL OF ETHNOPHARMACOLOGY 2002; 83:153-159. [PMID: 12413723 DOI: 10.1016/s0378-8741(02)00205-2] [Citation(s) in RCA: 128] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The inhibitors of prostaglandin biosynthesis and nitric oxide production have been considered as potential anti-inflammatory and cancer chemopreventive agents. In this study, we evaluated approximately 170 methanol extracts of natural products including Korean herbal medicines for the inhibition of prostaglandin E(2) production (for COX-2 inhibitors) and nitric oxide formation (for iNOS inhibitors) in lipopolysaccharide (LPS)-induced mouse macrophages RAW264.7 cells. As a result, several extracts such as Aristolochia debilis, Cinnamomum cassia, Cinnamomum loureirii, Curcuma zedoaria, Eugenia caryophyllata, Pterocarpus santalius, Rehmania glutinosa and Tribulus terrestris showed potent inhibition of COX-2 activity (>80% inhibition at the test concentration of 10 micro g/ml). In addition, the extracts of A. debilis, Caesalpinia sappan, Curcuma longa, C. zedoaria, Daphne genkwa and Morus alba were also considered as potential inhibitors of iNOS activity (>70% inhibition at the test concentration of 10 micro g/ml). These active extracts mediating COX-2 and iNOS inhibitory activities are warranted for further elucidation of active principles for development of new cancer chemopreventive and/or anti-inflammatory agents.
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Lee SK, Hong SH. Maternity aides utilization in the maternal and child health and family planning under supervision of the director of health center. KYONGBUK UIDAE CHAPCHI 2002; 14:407-21. [PMID: 12335745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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