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Cho K, Min C, Jung J, Lee S, Lee S, Huh H, Cho S, Shim J, Chang K, Kim W, Yong Ho K, Moon S, Kim E, Yeo S, Kwon S. Dosimetric Evaluation Using MVCT Images for Adapted Plan-Dose Monitoring in Tomotherapy. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2492] [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: 12/01/2022]
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2
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Cabrera-Lopez C, Ars E, Marti T, Harris PC, Torra R, Clerckx C, Migeon T, Chen Z, Ronco P, Plaisier E, Lamers IJ, Van Reeuwijk J, Azam M, Boldt K, Maria M, Koster-Kamphuis L, Qamar R, Ueffing M, Cremers FP, Roepman R, Arts HH, Papizh S, Dlin V, Leontieva I, Tutelman K, Perrone RD, Bae KT, Chapman AB, Devuyst O, Gansevoort RT, Grantham JJ, Higashihara E, Torres VE, Sergeyeva O, Zhou W, Blais JD, Czerwiec FS, Liu F, Liao Y, Fu P, Casteleijn N, Zittema D, Bakker S, Boertien W, Gaillard C, Meijer E, Spithoven E, Struck J, Gansevoort R, Robinson P, McEwan P, Hadimeri H, Ong ACM, Orskov B, Peces R, Sandford R, Scolari F, Walz G, Cooke C, O'Reilly K, Riwanto M, Kapoor S, Rodriguez D, Edenhofer I, Segerer S, Wuthrich RP, De Rechter S, Bacchetta J, Van Dyck M, Evenepoel P, De Schepper J, Levtchenko E, Mekahli D, Carr A, Makin A, Baker A, Obeidova L, Stekrova J, Seeman T, Puchmajerova A, Reiterova J, Kohoutova M, Tesar V, Treille S, Bailly JM, Guillaume B, Tuta L, Stanigut A, Botea F, Jo HA, Park HC, Kim H, Han M, Huh H, Jeong JC, Oh KH, Yang J, Koo TY, Hwang YH, Ahn C, Pisani A, Remuzzi G, Ruggenenti P, Riccio E, Visciano B, Spinelli L, Kim JI, Park KM, Liu FX, Rutherford P, Smoyer-Tomic K, Martinez Jimenez V, Comas J, Arcos E, Diaz JM, Muray S, Cabezuelo J, Ballarin J, Ars E, Torra R, Miyaoka T, Morimoto S, Kataoka H, Mochizuki T, Tsuchiya K, Ichihara A, Nitta K. RENAL DEVELOPMENT AND CYSTIC DISEASES. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu141] [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: 11/14/2022] Open
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Abstract
A CHCl(3): MeOH extract of the fruit ofLycium chinense Mill. (Solanaceae) was found to afford significant protection against carbon tetrachloride-induced toxicity in primary cultures of rat hepatocytes. Subsequent activity-guided fractionation resulted in the isolation of zeaxanthin and zeaxanthin dipalmitate as antihepatotoxic components. Incubation of injured hepatocytes with zeaxanthin dipalmitate reduced the levels of glutamic pyruvic transaminase (GPT) and sorbitol dehydrogenase (SDH) released from damaged cells to 60.5% and 76.3% of those released from untreated controls, respectively. Zeaxanthin also reduced the levels of GPT and SDH to 68.5% and 61.3% of the levels of those released from the untreated control. The results confirm the hepatoprotective activities of zeaxanthins. Antihepatotoxic activities of zeaxanthins are comparable to that of silybin.
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Affiliation(s)
- S Y Kim
- College of Pharmacy, Seoul National University, 56-1 Shillim-Dong, Kwanak-Gu, 151-742, Seoul, Korea
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Choi S, Huh H, Kim S, Kim C, Ji Y, Kim W, Kim H. SU-E-T-475: Small Field Dosimetry of Volumetric Modulated Arc Therapy According to a New Dosimetry Formalism. Med Phys 2011. [DOI: 10.1118/1.3612429] [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: 11/07/2022] Open
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Lee S, Yi J, Park J, Cho S, Shim J, Chang K, Cao Y, Lee S, Huh H, Kim C. Development of 3D Dosimetry System using Polymer Gel (TENOMAG) and Optical-CT Scanner in Prostate IMRT. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1732] [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: 12/01/2022]
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Lee S, Cho S, Huh H, Lee S, Shin H, Kwon S, Yun H, Yang D, Park Y, Kim C. 938 POSTER Development of a new normoxic polymer gel dosimeter (TENOMAG). EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70577-3] [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: 10/22/2022] Open
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Lee S, Cho K, Shin H, Shin D, Huh H, Lee S, Cho S, Yang D, Park Y, Kim C. 937 POSTER A study on the optimization of beam direction and virtual organ delineation to minimize radiation pneumonitis in the intensity modulated radiotherapy of lung cancer. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)70576-1] [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: 11/25/2022] Open
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Shin D, Yoon M, Park S, Lee S, Lee S, Lee S, Huh H, Cho K, Shin D. SU-FF-T-412: The Development of Multiple Heterogeneous Head and Neck Phantoms for Quality Assurance of Inhomogeneity Correction Algorithm in the Intensity Modulated Radiotherapy and Conformal Dynamic Arc Radiotherapy. Med Phys 2006. [DOI: 10.1118/1.2241331] [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: 11/07/2022] Open
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Kim CY, Im HW, Kim HK, Huh H. Accumulation of 2,5-dimethoxy-1,4-benzoquinone in suspension cultures of Panax ginseng by a fungal elicitor preparation and a yeast elicitor preparation. Appl Microbiol Biotechnol 2001; 56:239-42. [PMID: 11499937 DOI: 10.1007/s002530000557] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Suspension cultures of Panax ginseng C.A. Meyer (Araliaceae) were treated with either an elicitor preparation from the culture broth of the phytopathogenic hyphomycete Botrytis cinerea or a yeast elicitor preparation, and the accumulation of a new compound, which was not detected in non-elicited cultures, was observed. The accumulated compound was isolated and shown to be 2,5-dimethoxy-1,4-benzoquinone by 1H-NMR, 13C-NMR and electron ionization (EI) mass spectra. While it is well known that this compound shows antibacterial activity against Staphylococcus aureus, its presence in ginseng root has not been reported to date. Levels of the compound in the media increased rapidly, reaching a maximum level of 65.10 +/- 4.96 microg/g fresh weight at approximately 12 h after treatment with the yeast elicitor preparation. The maximal level of the compound in medium from the culture treated with an elicitor preparation from the culture broth of B. cinerea was 46.13 +/- 10.42 microg/g fresh weight after 24 h of incubation.
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Affiliation(s)
- C Y Kim
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Korea
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Kim SR, Sung SH, Kwon SW, Park JH, Huh H, Kim YC. Dammarane derivatives protect cultured rat cortical cells from glutamate-induced neurotoxicity. J Pharm Pharmacol 2000; 52:1505-11. [PMID: 11197079 DOI: 10.1211/0022357001777540] [Citation(s) in RCA: 6] [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: 01/05/2023]
Abstract
We previously reported that ginsenosides Rb1 and Rg3, dammarane glycosides, of Panax ginseng C. A. Meyer (Araliaceae), significantly attenuated glutamate-induced neurotoxicity in primary cultures of rat cortical cells. To seek more potent neuroprotective compounds, we attempted to modify the chemical structure of dammarane glycosides and obtained six derivatives, MA-11, PT-11, PT-111, POA-101, POA-111 and N-001. The neuroprotective activity of these dammarane derivatives were evaluated employing primary cultures of rat corticoid cells. The glutamate-induced neuronal cell damage was significantly reduced by a pre-treatment with protopanaxadiol, MA-11 or PT-11 at concentrations ranging from 100 nM to 10 microM. Both MA-11 and PT-11, preserved the levels of catalase and inhibited decreases in glutathione reductase in glutamate-injured cells. Furthermore, the dammarane derivatives reduced the content of intracellular peroxide in glutamate-intoxicated cells. Finally, they inhibited the formation of malondialdehyde, a compound produced during lipid peroxidation, in glutamate-insulted cells. These results show that the dammarane derivatives, MA-11 and PT-11, exert significant neuroprotective effects on cultured cortical cells by a mechanism seemingly distinct from that afforded by ginsenosides Rb1 and Rg3. As such, the dammarane derivatives may be efficacious in protecting neurons from oxidative damage caused by exposure to excess glutamate.
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Affiliation(s)
- S R Kim
- College of Pharmacy, Seoul National University, Korea
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Shin DY, Kim HS, Min KH, Hyun SS, Kim SA, Huh H, Choi EC, Choi YH, Kim J, Choi SH, Kim WB, Suh YG. Isolation of a potent anti-MRSA sesquiterpenoid quinone from Ulmus davidiana var. japonica. Chem Pharm Bull (Tokyo) 2000; 48:1805-6. [PMID: 11086922 DOI: 10.1248/cpb.48.1805] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [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: 11/22/2022]
Abstract
A highly potent anti-MRSA sesquiterpenoid has been isolated from Ulmus davidiana var. japonica, which has been traditionally used to treat infectious diseases in Korea. This naturally occurring antibiotic was identified as mansonone F (1). This compound has been found to be highly active specifically against MRSA and showed an MIC range of 0.39-3.13 microg/ml which is comparable to that of vancomycin.
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Affiliation(s)
- D Y Shin
- College of Pharmacy, Seoul National University, Kwanak-Gu, Korea
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12
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Abstract
The immunomodulating activity of a polysaccharide isolated from Morus alba (PMA) root bark was examined in murine splenic lymphocytes. PMA enhanced proliferation of splenic lymphocytes in a synergistic manner in the presence of mitogens. However, PMA suppressed primary IgM antibody production from B cells, which was activated with lipopolysaccharide, a polyclonal activator, or immunized with a T-cell dependent antigen sheep red blood cells. Our observations showed that the immunomodulating activity of PMA increased lymphocyte proliferation and that PMA decreased antibody production from B cells, which was distinct from those of other plant-originated polysaccharides.
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Affiliation(s)
- H M Kim
- Korea Research Institute of Bioscience and Biotechnology, Yusung, Taejon
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13
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Abstract
A methanol extract of the stem bark of Paulownia tomentosa showed antiviral activity against poliovirus types 1 and 3. Sequential liquid-liquid extraction with n-hexane, chloroform and water, and a silicagel column chromatography resulted in the purification of a compound. The compound was identified as methyl-5-hydroxy-dinaphthol[1,2-2',3']furan-7,12-dione-6-carbox yla te on the basis of spectroscopic data. The component caused a significant reduction of viral cytopathic effect when it was subjected to a standard antiviral assay by using HeLa cells. The EC(50) of the compound against poliovirus type 1 strain Brunhilde, and type 3 strain Leon were 0.3 microg/mL and 0.6 microg/mL, respectively.
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Affiliation(s)
- K H Kang
- College of Pharmacy, Seoul National University, Seoul 151-742, Korea
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Abstract
We have been screening anti-HIV integrase compounds from Korean medicinal plants by using an in vitro assay system which is mainly composed of recombinant human immunodeficiency virus type 1 integrase and radiolabeled oligonucleotides. From the above screening, the aqueous methanolic extract of the roots of Agastache rugosa exhibited a significant activity. Bioactivity-guided chromatographic fractionation of the methanolic extract resulted in the isolation of rosmarinic acid. The structure of the compound was determined by spectroscopic data and by the comparison with the reported values. The IC50 of the rosmarinic acid was approximately 10 microg/ml against HIV integrase.
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Affiliation(s)
- H K Kim
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Korea
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15
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Abstract
A new glycoprotein was purified from the aqueous methanolic extract of the root bark of Morus alba which has been used as a component of antidiabetic remedy in Oriental Medicine. SDS-PAGE result shows that the molecular weight of the glycoprotein was approximately 20 kDa. This new glycoprotein was named as Moran 20K. The protein lowered blood glucose level in streptozotocin-induced hyperglycemic mice model and it also increased the glucose transport in cultured epididymis fat cells. The amino acid composition of the protein was analyzed, and the protein contained above 20% serine and cysteine such as insulin. The actual molecular weight of the protein was determined as 21,858 Da by MALDI-TOF mass spectroscopy.
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Affiliation(s)
- E S Kim
- Department of Pharmacy, Seoul National University, Korea
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Jang YP, Lee YJ, Kim YC, Huh H. Production of a hepatoprotective cerebroside from suspension cultures of Lycium chinense. Plant Cell Rep 1998; 18:252-254. [PMID: 30744230 DOI: 10.1007/s002990050566] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Suspension cultures derived from Lycium chinense Miller seedlings produced significant amounts of a hepatoprotective cerebroside. Callus was induced from the stem of aseptic seedlings of L. chinense and maintained on MS solid media supplemented with 1.0 ppm 2,4-D and 0.1 ppm kinetin. Suspension cultures were established, and the cells were grown in the same liquid media in the dark. Lyophilized cells were extracted with a combined reagent of chloroform and methanol (2:1, v/v). An aqueous suspension of the evaporated cell extract was partitioned with chloroform, and the chloroform layer was subjected to silicic acid column chromatography followed by semi-preparative reverse phase C8 high pressure liquid chromatography. The purified compound showed hepatoprotective activity comparable to that shown by silymarin, and the structure was identified as 1-O-(β-D-glucopyranosyl)-(2S,3R,4E,8Z)-2-N-2'-hydroxy-(palmitoyl)-4,8-sphingadiene on the basis of spectral data. The content of the compound in cultured cell was tenfold higher than that of the fruit of L. chinense. The biosynthesis of the compound in cultured cell systems appears to parallel cell growth.
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Affiliation(s)
- Y P Jang
- College of Pharmacy, Seoul National University, 56-1 Shillim-Dong, Kwanak-Gu, Seoul 151-742, Korea e-mail: Fax: +82-2-884-6086, , , , , , KR
| | - Y J Lee
- College of Pharmacy, Seoul National University, 56-1 Shillim-Dong, Kwanak-Gu, Seoul 151-742, Korea e-mail: Fax: +82-2-884-6086, , , , , , KR
| | - Y C Kim
- College of Pharmacy, Seoul National University, 56-1 Shillim-Dong, Kwanak-Gu, Seoul 151-742, Korea e-mail: Fax: +82-2-884-6086, , , , , , KR
| | - H Huh
- College of Pharmacy, Seoul National University, 56-1 Shillim-Dong, Kwanak-Gu, Seoul 151-742, Korea e-mail: Fax: +82-2-884-6086, , , , , , KR
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Abstract
In order to find out anti-platelet activating factor (PAF) from natural resources, Korean medicinal plants used for the treatments of peripheral circulation disorders were tested for their possible protective effects on PAF-induced anaphylactic shock. From the above screening, the methanol extract of Gentiana scabra showed a potent antagonistic activity against PAF. Water suspension of the extract was partitioned with CH2Cl2 and EtOAc, successively. The EtOAc fraction which showed the highest activity was chromatographed on silica gel to yield 6 fractions. From the fraction which showed higher PAF-antagonistic activity than the other fractions, compound 1 was isolated by recrystallization. On the basis of spectral data, compound 1 was identified as 2-hydroxy-3-methoxybenzoic acid glucose ester. The compound prevented the mice from the PAF-induced death at a dose of 300 micrograms/mouse.
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Affiliation(s)
- H Huh
- College of Pharmacy, Seoul National University, Korea
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18
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Abstract
Two cerebrosides isolated from Lycium chinense fruits have been characterized as 1-O-beta-D-glucopyranosyl-(2S, 3R,4E,8Z)-2-N-palmitoyloctadecasphinga-4,8-dienine+ ++ (1) and 1-O-beta-D-glucopyranosyl -(2S,3R,4E,8Z)-2-N-(2'-hydroxypalmitoyl)octadecasph inga-4,8-dienine (2). While 2 is already known, the structure of 1 was determined by spectral and chemical studies. Incubation of CCl4-intoxicated hepatocytes with 1 and 2, respectively, significantly reduced the levels of glutamic pyruvic transaminase (GPT) and sorbitol dehydrogenase (SDH) released by injured cells.
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Affiliation(s)
- S Y Kim
- College of Pharmacy, Seoul National University, Korea
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Jeon MH, Sung SH, Huh H, Kim YC. Ginkgolide B production in cultured cells derived from Ginkgo biloba L. leaves. Plant Cell Rep 1995; 14:501-504. [PMID: 24185520 DOI: 10.1007/bf00232783] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/1994] [Revised: 08/31/1994] [Indexed: 06/02/2023]
Abstract
Callus cultures and cell suspension cultures derived from Ginkgo biloba L. leaves produced ginkgolidc B. In cell suspension cultures, the production reached a maximum by the 13th day of subculture and followed by a sharp decrease. The medium of Murashige and Skoog induced the highest ginkgolide B content in cultures while the medium of Schenk and Hildebrandt promoted cell growth. For the maximal production of ginkgolide B, cells were cultured in Murashige and Skoog medium modified to contain 1.0 mg/l of α-naphthaleneacetic acid, 0.1 mg/1 of kinetin, 30 g/1 sucrose and 1.25 mM potassium phosphate with a molar ratio of ammonium to nitrate ions of 1 ∶ 3.
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Affiliation(s)
- M H Jeon
- College of Pharmacy, Seoul National University, San 56-1 Shillim-Dong, 151-742, Kwanak-Gu, Seoul, Korea
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Affiliation(s)
- H Huh
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Abstract
The ontogenic aspects of ginkgolide production were studied by using GINKGO BILOBA seedlings, greenhouse plants, young trees, mature trees cuttings, and plant tissue cultures. Ginkgolide yield appeared to be increased with the age of the plants when the plants were grown under the same environmental conditions. Ginkgolide content in the leaves was increased when seedlings, young plants, and young trees were treated with fluridone, a carotenoid biosynthesis inhibitor. Ginkgolides appeared to be independently biosynthesized in leaves and roots of the GINKGO and stored in root bark and stem as more hydroxylated forms such as ginkgolide B or ginkgolide C.
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Affiliation(s)
- H Huh
- Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455, U.S.A
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Höfer M, Huh H, Künemund A. Membrane potential and cation permeability. A study with a nystatin-resistant mutant of Rhodotorula gracilis (Rhodosporidium toruloides). Biochim Biophys Acta 1983; 735:211-4. [PMID: 6684955 DOI: 10.1016/0005-2736(83)90295-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Cells of a nystatin-resistant mutant of the obligatory aerobic yeast Rhodotorula gracilis displayed an electrical potential difference, delta psi, across the plasma membrane which was, in contrast to the wild-strain cells, virtually independent of the pH of cell suspensions down to 4.5. In addition, the delta psi in mutant cells was insensitive to extracellular K+ concentrations. The mutant cells failed to cotransport measurable amounts of H+ by the onset of monosaccharide transport and to take up K+ in exchange for H+. Taking into account the lower passive permeability of the mutant plasma membrane for cations, it has been concluded that the pH dependency of delta psi in wild-strain cells is correlated with the electrogenic leak of H+ back into the cells in course of increasing delta pH across the plasma membrane.
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Höfer M, Thiele OW, Huh H, Hunneman DH, Mracek M. A nystatin-resistant mutant of Rhodotorula gracilis. Transport properties and sterol content. Arch Microbiol 1982; 132:313-6. [PMID: 6891206 DOI: 10.1007/bf00413381] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A nystatin-resistant mutant of Rhodotorula gracilis was obtained by treatment of the wild strain cells with N-methyl-N-nitro-N-nitrosoguanidine and selected on agar plates containing 150 micrograms nystatin/ml. Three important transport functions of the plasma membrane of mutant cells: the accumulation of monosaccharides, the generation and maintenance of the pH-gradient and of the membrane potential, as well as the cell respiration were insensitive to at least 10(-5) M nystatin. This concentration of nystatin inhibited completely all these processes in wild strain cells. Analysis of cellular sterols revealed a defect of ergosterol biosynthesis in the mutant, which was localized at the last oxidative step between 5,6-dihydroergosterol and ergosterol.
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Klingmüller W, Huh H, Kaudewitz F. [Regulatory function of sorbose-resistance gene C in sugar transport of Neurospora]. Mol Gen Genet 1970; 109:27-41. [PMID: 5488084 DOI: 10.1007/bf00334044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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