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Cho SH, Strickland I, Boguniewicz M, Leung DY. Fibronectin and fibrinogen contribute to the enhanced binding of Staphylococcus aureus to atopic skin. J Allergy Clin Immunol 2001; 108:269-74. [PMID: 11496245 DOI: 10.1067/mai.2001.117455] [Citation(s) in RCA: 173] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Staphylococcus aureus colonizes the skin lesions of more than 90% of patients with atopic dermatitis (AD). The mechanism for increased S aureus colonization in AD is unknown. However, the initial event in colonization requires adherence of S aureus to the skin. OBJECTIVE The purpose of this study was to examine the roles of various bacterial adhesins on S aureus binding to AD skin. METHODS In an attempt to delineate the mechanism behind this adherence process, an in vitro bacterial binding assay was developed to quantitate the adherence of various S aureus strains to AD, psoriatic, and normal skin sections. S aureus strains used in this study were obtained either from cultures of AD skin lesions or from genetically manipulated strains of S aureus that lacked specific microbial surface components recognizing adhesive matrix molecules (MSCRAMMs)--namely, fibronectin-binding protein (Fnbp), fibrinogen-binding protein (Clf), collagen-binding protein (Cna), and their parent strains. In addition, S aureus strains from patients with AD were pretreated with fibronectin or fibrinogen to block MSCRAMM receptors and interfere with binding. RESULTS Under all experimental conditions, binding of S aureus was localized primarily to the stratum corneum. Immunocytochemical staining of AD skin sections showed a redistribution of fibronectin to the cornified layer, an observation not seen in normal skin. S aureus binding to uninvolved AD skin was significantly greater than the binding to uninvolved psoriatic skin (P <.0001) and normal skin (P <.0005). The Fnbp-negative S aureus showed a significant reduction in binding to the AD skin (P <.0001) but not to the psoriatic and normal skin. In the AD skin, a significant reduction in the binding of S aureus was also observed in the Clf-negative strain (P <.0001) but not in the Cna-negative S aureus. Preincubation of S aureus with either fibronectin or fibrinogen also inhibited bacterial binding to AD skin (P <.0001). CONCLUSION These data suggest that fibronectin and fibrinogen--but not collagen--play a major role in the enhanced binding of S aureus to the skin of patients with AD.
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Eom YW, Cho SH, Hwang JS, Yoon SB, Na DS, Kang IJ, Kang SS, Song WK, Kim JH. Rac and p38 kinase mediate 5-lipoxygenase translocation and cell death. Biochem Biophys Res Commun 2001; 284:126-32. [PMID: 11374881 DOI: 10.1006/bbrc.2001.4937] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
5-Lipoxygenase (5-LO) is a key enzyme involved in the synthesis of leukotrienes from arachidonic acid, and its activation is usually followed by translocation to the nuclear envelope. The details of mechanisms involved in the translocation of 5-LO are not well understood, though Ca(2+) is known to be essential. Here we show that ionomycin, a Ca(2+) ionophore, induces 5-LO translocation and necrotic cell death in Rat-2 fibroblasts, suggesting a potential relationship between activation of 5-LO and cell death. These effects were markedly attenuated in Rat2-Rac(N17) cells expressing a dominant negative Rac1 mutant. Pretreatment with SB203580, a specific inhibitor of p38 MAP kinase, or EGTA, a Ca(2+) chelator, likewise diminished ionomycin-induced 5-LO translocation and cell death, but PD98059, a MEK inhibitor, did not. Thus, Rac and p38 MAP kinase appear to be components in a Ca(2+)-dependent pathway leading to 5-LO translocation and necrotic cell death in Rat-2 fibroblasts.
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Yoo MH, Woo CH, You HJ, Cho SH, Kim BC, Choi JE, Chun JS, Jhun BH, Kim TS, Kim JH. Role of the cytosolic phospholipase A2-linked cascade in signaling by an oncogenic, constitutively active Ha-Ras isoform. J Biol Chem 2001; 276:24645-53. [PMID: 11323430 DOI: 10.1074/jbc.m101975200] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Activation of Ras signaling by growth factors has been associated with gene regulation and cell proliferation. Here we characterize the contributory role of cytosolic phospholipase A(2) in the oncogenic Ha-Ras(V12) signaling pathway leading to activation of c-fos serum response element (SRE) and transformation in Rat-2 fibroblasts. Using a c-fos SRE-luciferase reporter gene, we showed that the transactivation of SRE by Ha-Ras(V12) is mainly via a Rac-linked cascade, although the Raf-mitogen-activated protein kinase cascade is required for full activation. In addition, Ha-Ras(V12)-induced DNA synthesis was significantly attenuated by microinjection of recombinant Rac(N17), a dominant negative mutant of Rac1. To identify the mediators downstream of Rac in the Ha-Ras(V12) signaling, we investigated the involvement of cytosolic phospholipase A(2). Oncogenic Ha-Ras(V12)-induced SRE activation was significantly inhibited by either pretreatment with mepacrine, a phospholipase A(2) inhibitor, or cotransfection with the antisense oligonucleotide of cytosolic phospholipase A(2). We also found cytosolic phospholipase A(2) to be situated downstream of Ha-Ras(V12) in a signal pathway leading to transformation. Together, these results are indicative of mediatory roles of Rac and cytosolic phospholipase A(2) in the signaling pathway by which Ha-Ras(V12) transactivates c-fos SRE and transformation. Our findings point to cytosolic phospholipase A(2) as a novel potential target for suppressing oncogenic Ha-Ras(V12) signaling in the cell.
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Cho SH, Strickland I, Tomkinson A, Fehringer AP, Gelfand EW, Leung DY. Preferential binding of Staphylococcus aureus to skin sites of Th2-mediated inflammation in a murine model. J Invest Dermatol 2001; 116:658-63. [PMID: 11348452 DOI: 10.1046/j.0022-202x.2001.01331.x] [Citation(s) in RCA: 141] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Staphylococcus aureus is found on over 90% of atopic dermatitis skin lesions and is thought to contribute to skin inflammation via the production of potent exotoxins. In contrast, less than 5% of normal subjects harbor S. aureus. This suggests that an atopic immune response itself may play a role in preferential binding of S. aureus to the skin. To examine this issue more directly, we analyzed the S. aureus binding characteristics of skin in mice undergoing different T helper type 1 cell versus T helper type 2 cell inflammatory responses using a novel in vitro bacterial binding assay. BALB/C female mice were first sensitized to ovalbumin with alum or ovalbumin with complete Freund's adjuvant to induce T helper type 2 or T helper type 1 responses, respectively. Mice were then challenged intradermally with either saline (control) or ovalbumin. Forty-eight hours later, skin specimens were obtained from the challenge sites, and the number of S. aureus binding to each skin section was quantitated. Bacterial binding was found to be significantly greater at skin sites of BALB/C mice that had been ovalbumin/alum sensitized compared with ovalbumin/complete Freund's adjuvant sensitized (p < or = 0.01). When compared to the ovalbumin sensitized/challenged skin of wild type BALB/C mice or interferon-gamma gene knockout mice, interleukin-4, but not interferon-gamma, gene knockout mice had significantly less S. aureus binding at their ovalbumin sensitized/challenged skin sites. Mutant S. aureus strains that lacked either fibronectin- or fibrinogen-binding protein expression showed significantly reduced S. aureus binding compared with the parent wild type strain (p < 0.005). Moreover, preincubation of the wild type bacteria with fibronectin or fibrinogen, but not collagen, resulted in significantly less skin binding of S. aureus (p < 0.01). Incubation of skin with interleukin-4, and less so with interferon-gamma, led to more binding of wild type S. aureus but not of an S. aureus mutant deficient in fibronectin binding protein expression. After interleukin-4 incubation, but not interferon-gamma, epidermal immunoreactivity for fibronectin was observed in murine skin explants. These results show that a T helper type 2 inflammatory environment can promote skin binding by S. aureus and that this binding is mediated by fibronectin and fibrinogen.
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Hwang YY, Moon H, Cho SH, Kim KT, Moon YJ, Kim SR, Kim DS. Ten-year survival of patients with locally advanced, stage ib-iib cervical cancer after neoadjuvant chemotherapy and radical hysterectomy. Gynecol Oncol 2001; 82:88-93. [PMID: 11426967 DOI: 10.1006/gyno.2001.6204] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE(S) The aim of this study was to evaluate the effects of neoadjuvant chemotherapy and radical hysterectomy on long-term survival in stage IB-IIB locally advanced cervical cancer by conducting a 10-year follow-up. METHODS Between August 1983 and May 1990, 80 locally advanced, stage IB-IIB cervical cancer patients with tumor diameter greater than or equal to 4 cm were treated with neoadjuvant VBP chemotherapy (cisplatin, vinblastine, and bleomycin) followed by radical hysterectomy with pelvic lymphadenectomy. After this therapeutic modality, patients were followed for more than 10 years. Ten-year survival rates and factors affecting recurrence after this therapy were evaluated. RESULTS Of 80 patients, 75 (93.7%) showed a reduction in tumor size after neoadjuvant chemotherapy. At pathologic examination, stage reduction was noted in 53 (66.2%) patients and 20 patients (25%) showed no residual or microinvasive cervical tumor. Pelvic lymph node metastases were found in 17 patients (21.3%). During the 10-year follow up, 2 patients were lost and 16 patients recurred. Overall 5-year and 10-year disease-free actual survival rates were 82.0 (64/78) and 79.4% (62/78), respectively. Clinical stage, initial tumor size, clinical response, and residual tumor size were not risk factors for recurrence after this therapy. However, pelvic lymph node metastasis was a significant risk factor for recurrence. CONCLUSION(S) Neoadjuvant VBP chemotherapy followed by radical hysterectomy in locally advanced, stage IB-IIB cervical cancer patients seemed to improve the long-term survival rate for these patients compared to that of conventional therapy. However, randomized controlled trials are needed to confirm this result.
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Kwon HJ, Cho SH, Nyberg F, Pershagen G. Effects of ambient air pollution on daily mortality in a cohort of patients with congestive heart failure. Epidemiology 2001; 12:413-9. [PMID: 11416779 DOI: 10.1097/00001648-200107000-00011] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
This study was planned to test the hypothesis that patients with congestive heart failure are more susceptible to the harmful effects of ambient air pollution than the general population. We used both general additive Poisson regression and the case-crossover approach to test the hypothesis. The effect of air pollution on daily mortality of patients with congestive heart failure among residents of Seoul, South Korea, during the period 1994--1998 was compared with that of the general population in the same area and the same period. The odds ratios and 95% confidence intervals (95% CIs) estimated from general additive models in the general population for an interquartile range increase of particulate matter less than 10 microm in diameter (42.1 microg/m(3)), carbon monoxide (0.59 ppm), nitrogen dioxide (14.6 ppb), sulfur dioxide (9.9 ppb), and ozone (20.5 ppb) were 1.014 (95% CI = 1.006- 1.022), 1.022 (95% CI = 1.017- 1.029), 1.021 (95% CI = 1.014- 1.029), 1.020 (95% CI = 1.012--1.028), and 1.010 (95% CI = 1.002--1.017), respectively. The estimated effects appeared larger among the congestive heart failure patients than among the general population (2.5 approximately 4.1 times higher depending on the pollutants). The results from the case-crossover analysis were similar. The finding of a stronger association in the patients with congestive heart failure reinforces the evidence that a harmful effect of air pollution is mediated by cardiovascular mechanisms.
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Kim YH, Kim JS, Cho SH. A comparison of polyethylene wear in hips with cobalt-chrome or zirconia heads. A prospective, randomised study. THE JOURNAL OF BONE AND JOINT SURGERY. BRITISH VOLUME 2001; 83:742-50. [PMID: 11482320 DOI: 10.1302/0301-620x.83b5.10941] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We have reviewed 70 patients with bilateral simultaneous total hip arthroplasties to determine the rate of failure and to compare polyethylene wear and osteolysis between an implant with a cobalt-chrome head and Hylamer liner with that of a zirconia head and Hylamer liner. The mean thickness of the polyethylene liner was 11.0 mm (8.8 to 12.2) in the hip with a zirconia head and 10.7 mm (8.8 to 12.2) in that with a cobalt-chrome head. At follow-up at 6.4 years no acetabular or femoral component had been revised for aseptic loosening and no acetabular or femoral component was loose according to radiological criteria in both the cemented and cementless groups. The mean rate of linear wear and annual wear rate were highest in the 22 mm zirconia femoral head (1.25 mm (SD 1.05) and 0.21 mm (SD 0.18), respectively) and lowest in the 22 mm cobalt-chrome femoral head (0.70 mm (SD 0.39) and 0.12 mm (SD 0.07), respectively). The mean volumetric wear was highest in the 28 mm zirconia femoral head (730.79 mm ) and lowest in the 22 mm cobalt-chrome femoral head (264.67 mm3), but if the results were compared by size of the femoral head and type of material there was no statistical difference (p > 0.05). Sequential measurements of annual wear showed that the zirconia femoral head had a relatively higher rate of penetration than the cobalt-chrome head over the first three years; thereafter the rate of wear was reduced and compared favourably with that of cobalt-chrome heads. There was a statistically significant relationship between the wear of the polyethylene liner and the age of the patient, male gender and the degree of abduction angle of the cup, but not diagnosis, weight, hip score, range of movement, or amount of anteversion. Osteolysis was identified on both sides of the acetabulum in six patients (9%). Of 12 hips with acetabular osteolysis, six had a 28 mm cobalt-chrome femoral head and the remaining six a 28 mm zirconia head. Osteolysis was observed in zones 1A and 7A of the femur in two hips (3%) with a 28 mm zirconia head (cemented hip) and in four (6%) with a 28 mm cobalt-chrome femoral head (cementless hip). Our findings suggest that although the performance of a zirconia femoral head with a Hylamer liner was not statistically different from that of a cobalt-chrome femoral head and Hylamer liner, there was a trend for the zirconia head to be worse than the cobalt-chrome femoral head.
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Lee HW, Cho SH, Shin EH, Lee JS, Lee JS, Chai JY, Lee SH, Kim TS. Experimental infection of Anopheles sinensis with Korean isolates of Plasmodium vivax. THE KOREAN JOURNAL OF PARASITOLOGY 2001; 39:177-83. [PMID: 11441505 PMCID: PMC2721095 DOI: 10.3347/kjp.2001.39.2.177] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The objectives of the present study were to (1) determine the susceptibility of Anopheles sinensis to Korean isolates of Plasmodium vivax, (2) establish a method to collect large quantities of P. vivax sporozoites for use as antigen in seroepidemiological studies, and (3) investigate the characteristics of Korean isolates of P. vivax sporozoites. Females of Anopheles sinensis were collected at non-epidemic area, Seokwha-ri, Cheongwon-gun and Chungcheongbuk-do using tent-trap methods coupled with dry ice. The females were artificially infected with gametocytes of P. vivax using blood obtained from P. vivax malaria patients. Individual mosquitoes were infected using either a parafilm-covered glass feeding apparatus or were allowed to feed on naturally infected volunteers. Mosquitoes were sacrificed between 16 and 18 days post-feeding and an enzyme-linked immunosorbent assay (ELISA) was used to detect sporozoites. Four (33.4%) of 12 mosquitoes, which were fed on naturally infected volunteers directly, were positive for sporozoites. In cases, the mosquitoes allowed to feed on whole blood which were extract from three different patients with heparin treated vacuutainers using a parafilm-covered glass apparatus. Two of 55 (3.6%) were positive which blood sample was maintained at room temperature for 8 hours, 1 of 68 (1.5%) was positive which blood was maintained at 4 degrees C for 24 hours and 1 of 47 (2.3%) was positive at 4 degrees C for 48 hours. The mean number of sporozoites was estimated about 818 (n = 8; range of 648-1,056) based on optical density values of ELISA.
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Lee MH, Kim YK, Min KU, Lee BJ, Bahn JW, Son JW, Cho SH, Park HS, Koh YY, Kim YY. Differences in sensitization rates to outdoor aeroallergens, especially citrus red mite (Panonychus citri), between urban and rural children. Ann Allergy Asthma Immunol 2001; 86:691-5. [PMID: 11428744 DOI: 10.1016/s1081-1206(10)62300-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND A recent investigation has suggested that citrus red mite (Panonychus citri, CRM) is the most important allergen in citrus-cultivating farmers with asthma and allergic rhinitis. OBJECTIVE A cross-sectional survey was performed to evaluate the prevalence of asthma and chronic rhinitis symptoms and sensitization to common indoor and outdoor aeroallergens, including CRM and Japanese cedar pollen, in rural and urban Korean children. METHODS A total of 2,055 children (1,055 subjects living in rural areas with citrus farms and 1,000 controls in urban areas without citrus farms) were enrolled. They were evaluated by a questionnaire, and by skin prick tests with 13 common indoor and outdoor aeroallergens, including CRM and Japanese cedar pollen. RESULTS The prevalence of wheezing and chronic rhinitis symptoms during the last 12 months was 8.3% and 35.7% in the rural children and 10.5% and 22.4% in the control group. The most common sensitizing allergens in order of decreasing frequency were Dermatophagoides pteronyssinus (26.6%), Dermatoplagoides farinae (22.7%), CRM (14.2%), cockroach (11.3%), and Japanese cedar pollen (9.7%) among the rural children, but the sensitization rates to CRM and Japanese cedar pollen were 1.3% and 0.2% among the control children, respectively. The prevalence of wheeze during the last 12 months was not different between rural children with sensitization to CRM or Japanese cedar pollen and those without sensitization (5.4% vs 6.1%; 6.9% vs 5.9%). However, the prevalence of chronic rhinitis during the last 12 months was higher among those with sensitization to CRM or to Japanese cedar pollen than among those without sensitization (40.8% vs 34.4%; 51.5% vs 33.5%). CONCLUSIONS CRM is a common sensitizing allergen in rural children, and the sensitization rates to outdoor aeroallergens, especially CRM and Japanese cedar pollen, are very different between children from rural and urban areas in Korea.
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Kim SH, Jeong H, Kim YK, Cho SH, Min KU, Kim YY. IgE-mediated occupational asthma induced by herbal medicine, Banha (Pinellia ternata). Clin Exp Allergy 2001; 31:779-81. [PMID: 11422138 DOI: 10.1046/j.1365-2222.2001.01067.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
There have been few reported cases of occupational asthma induced by Pinellia ternata (Banha), and the mechanism responsible for this type of asthma is still undetermined. We report a case of Banha-induced occupational asthma with IgE-mediated mechanism. The patient had positive skin responses to Banha extract and Banha-specific bronchial challenge elicited an early asthmatic response. The serum-specific IgE binding to Banha extract was detectable and completely inhibited with the additions of 0.1 microg/mL of Banha extract on ELISA inhibition. Seven IgE binding components to Banha extract (6.5, 22, 24, 32, 34, and 48 kDa) were detected using SDS-PAGE and immunoblot analysis. In conclusion, the results of this study suggest that P. ternata (Banha)-derived allergens are able to cause IgE-mediated bronchoconstriction in exposed workers.
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Cho SH, Kärtner FX, Morgner U, Ippen EP, Fujimoto JG, Cunningham JE, Knox WH. Generation of 90-nJ pulses with a 4-MHz repetition-rate Kerr-lens mode-locked Ti:Al(2)O(3) laser operating with net positive and negative intracavity dispersion. OPTICS LETTERS 2001; 26:560-562. [PMID: 18040385 DOI: 10.1364/ol.26.000560] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We demonstrate the generation of high-energy pulses by using a low-repetition-rate Kerr-lens mode-locked laser. Repetition rates as low as 4 MHz were achieved with a long, multiple-pass cavity and a semiconductor saturable Bragg reflector. The laser generated pulses of 55-fs duration with a pulse energy of 48 nJ when it was mode locked in the net negative dispersion regime. Mode locking in the positive dispersion regime reduces instabilities and enables pulses to have durations of 80 fs and energies as high as 90 nJ. This is, to our knowledge, the highest pulse energy and the lowest repetition rate ever generated directly from a femtosecond laser resonator without cavity dumping.
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Kim YK, Baek D, Koh YI, Cho SH, Choi IS, Min KU, Kim YY. Outdoor air pollutants derived from industrial processes may be causally related to the development of asthma in children. Ann Allergy Asthma Immunol 2001; 86:456-60. [PMID: 11345292 DOI: 10.1016/s1081-1206(10)62495-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND There is no consistent evidence that outdoor air pollutants are involved in the development of asthma. OBJECTIVE The aim of this study was to determine whether outdoor air pollutants derived from industrial processes were related to the prevalence of asthma, bronchial hyperresponsiveness, and atopy in exposed children. METHODS A total of 7,511 children from 7 to 12 years of age were recruited in the study. Eight hundred eighty-eight of 1,009 (88%) of the subjects living around industrial factories and 5,998 of 6,502 (92%) living in a less polluted neighboring area responded to the ISAAC questionnaire. A total of 1,492 subjects 8 to 9 years old underwent skin prick tests for 11 common aeroallergens. A total of 732 of the subjects from 8 to 9 years of age underwent bronchial provocation tests with hypertonic saline (BPT-HS). RESULTS The prevalence of ever experiencing wheezing and wheeze during the last 12 months was 25.6%, and 18.8% among the children living in the more polluted area. This was significantly higher than for those living in the less polluted area (14.2% and 9.0%, respectively). The positive rate of BPT-HS (the provocative dose of hypertonic saline causing 20% fall of FEV, < or = 23 mL) was higher among those in the more polluted area than in children living in the less polluted area (12.2% vs 7.5%). However, the rate of atopy based on the skin tests was the same in the two groups (28.3% vs 30.6%). CONCLUSIONS The prevalence of asthma and bronchial hyperresponsiveness was higher among children living around the heavily industrial area compared with those living in the less polluted area, despite similar atopic sensitization.
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Jang HS, Oh CK, Cha JH, Cho SH, Kwon KS. Six cases of confluent and reticulated papillomatosis alleviated by various antibiotics. J Am Acad Dermatol 2001; 44:652-5. [PMID: 11260541 DOI: 10.1067/mjd.2001.112577] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Confluent and reticulated papillomatosis (CRP) is a relatively rare disorder manifested by persistent papules that are confluent in the center and reticulated at the periphery with a characteristic distribution. Recently, many cases of CRP treated with minocycline have been reported, and their effect seems to be derived from their antibiotic properties. We report 6 cases of CRP alleviated by various antibiotics. The patient described in case 1 is a 16-year-old girl whose disease was alleviated by oral minocycline, 100 mg daily for 8 weeks. Cases 2 and 3 describe an 18-year-old woman and a 17-year-old male adolescent whose disease was reduced by oral fusidic acid, 1000 mg daily for 4 weeks. Case 4 describes a 14-year-old girl who received oral clarithromycin, 500 mg daily for 5 weeks. Case 5 describes a 22-year-old woman whose disease was reduced by oral erythromycin, 1000 mg daily for 6 weeks. Case 5 reports a 24-year-old man who received oral azithromycin, 500 mg daily 3 times per week for 3 weeks. Complete clearing after treatment with antibiotics raises the possibility that CRP is triggered by a bacterial infection and that antibiotics are the treatment of choice for CRP.
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Cho SH, Hartleroad JY, Oh CK. (S)-albuterol increases the production of histamine and IL-4 in mast cells. Int Arch Allergy Immunol 2001; 124:478-84. [PMID: 11340331 DOI: 10.1159/000053783] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Racemic albuterol is an equimolar mixture of (R)-albuterol and (S)-albuterol. Previous studies indicated that (S)-albuterol may exert proinflammatory effects. We investigated the effect of (S)-albuterol in the production of mast cell mediators such as histamine and interleukin (IL)-4. METHODS Murine mast cells were either unstimulated or stimulated by IgE-receptor crosslinking. Both groups of mast cells were pretreated with either (R)- or (S)-albuterol. Histamine release and IL-4 secretion were measured by ELISA. Expression of L-histidine decarboxylase (L-HDC) and IL-4 was analyzed by semiquantitative reverse transcription-polymerase chain reaction. RESULTS In the overnight IgE-stimulated group, secreted histamine and total histamine were approximately 19.9 and 18.3% greater in cells co-treated with (S)-albuterol than untreated cells, respectively (n = 4, p < 0.002, p < 0.02), whereas there was no significant difference between the cells treated with (R)-albuterol and untreated cells. When the IgE-stimulated cells were treated with (S)-albuterol for 6 and 24 h, histamine release was approximately 18.3 and 24% greater, respectively (n = 4, p < 0.01). L-HDC is an essential enzyme for synthesizing histamine and its message was significantly induced in mast cells treated with (S)-albuterol. Both IL-4 message and protein were also significantly increased after treatment with (S)-albuterol. In the overnight IgE-stimulated group, IL-4 secretion was increased by approximately 58.8% upon exposure to (S)-albuterol (n = 5, p < 0.01). (R)-albuterol had no effect on mast cell mediator release. CONCLUSION (S)-albuterol may have adverse effects in asthma control by activating mast cells to produce inflammatory mediators such as histamine and IL-4.
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Lee SK, Cho HK, Cho SH, Kim SS, Nahm DH, Park HS. Occupational asthma and rhinitis caused by multiple herbal agents in a pharmacist. Ann Allergy Asthma Immunol 2001; 86:469-74. [PMID: 11345295 DOI: 10.1016/s1081-1206(10)62498-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Herb agents have been widely used for centuries in the Orient and they have been cultivated throughout Asia. There have been a few cases of occupational allergy caused by herb materials. We report a case of occupational asthma and rhinitis caused by six herb materials in a pharmacist working at a pharmacy. OBJECTIVE We sought the role of immediate hypersensitivity in herbal agent-induced asthma in a pharmacist. METHODS AND RESULTS The patient had strong positive responses on skin prick test to extracts of six herb materials: Chunkung (Cnidii rhizoma), Banha (Pinellia ternata), Sanyak (Dioscorea radix), Kangwhal (Ostericum koreanum), Danggui (Angelica radix), and Kunkang (Zingiberis rhizoma). Bronchoprovocation tests showed an early asthmatic response to Danggui extract. Serum specific IgE antibodies to Chunkung, Banha, and Sanyak were detected by ELISA with no specific IgE bindings to Kangwhal, Danggui, and Kunkang extracts. Twelve percent sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and IgE immunoblotting revealed one IgE binding component (60 kD) within Chunkung extract, two (10, 25 kD) in Banha, and four (33, 34, 65, 98 kD) in Sanyak. Basophil histamine release test revealed that Danggui extract could release a greater amount of histamine from basophils in the patient than in a healthy control. CONCLUSIONS Chunkung, Banha, and Sanyak may induce IgE-mediated bronchoconstriction in an exposed worker, and Danggui can cause bronchoconstriction by direct histamine-releasing effect from mast cells in a sensitized patient.
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Delehedde M, Cho SH, Hamm R, Brisbay S, Ananthaswamy HN, Kripke M, McDonnell TJ. Impact of Bcl-2 and Ha-ras on keratinocytes in organotypic culture. J Invest Dermatol 2001; 116:366-73. [PMID: 11231309 DOI: 10.1046/j.1523-1747.2001.01260.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In this study, the role of specific molecular alterations associated with multistep skin carcinogenesis was assessed using in vitro organotypic cultures of the spontaneously immortalized, nontumorigenic HaCaT keratinocyte cell line. HaCaT vector control clones and clones expressing bcl-2, activated Ha-ras, or both genes were generated. Clones were induced to stratify and differentiate by culturing on dermal equivalents for 2 wk at the air-medium interface. In parental and vector control HaCaT rafts the expression and distribution of cytokeratin K1, K14, involucrin, proliferating cell nuclear antigen, and p21cip1/waf1 were assessed using immunohistochemistry and immunoblotting and were similar to normal epidermis. Apoptosis was also examined using the TUNEL technique. HaCaT-bcl-2 rafts were similar to control rafts but exhibited lower spontaneous rates of apoptosis and a moderate increase in the rate of proliferation. Differentiation was significantly inhibited in HaCaT-ras organotypic cultures and was associated with high rates of proliferation and lower rates of spontaneous apoptosis. Additionally, HaCaT-ras rafts exhibited significantly higher rates of apoptosis following ultraviolet irradiation compared with vector control or HaCaT-bcl-2 rafts. Bcl-2 was able to largely restore normal differentiation, proliferation, and apoptosis in HaCaT-ras/bcl-2 organotypic cultures. Bcl-2 also abrogated apoptosis induction following ultraviolet irradiation in HaCaT-ras/bcl-2 organotypic cultures. Organotypic keratinocyte culture represents a valuable in vitro system to evaluate the impact of individual molecular genetic alterations on the coordinate regulation of cell proliferation, differentiation, and cell death.
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Cho SH, Delehedde M, Rodriguez-Villanueva J, Brisbay S, McDonnell TJ. Bax gene disruption alters the epidermal response to ultraviolet irradiation and in vivo induced skin carcinogenesis. Int J Mol Med 2001; 7:235-41. [PMID: 11179500 DOI: 10.3892/ijmm.7.3.235] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Bcl-2 family member proteins are differentially expressed in skin and in non-melanoma skin cancer (NMSC). To elucidate the contribution of bcl-2 and bax proteins to epidermal differentiation and skin carcinogenesis, we investigated keratinocyte proliferation, differentiation and tumourigenesis in bcl-2(-/-) and bax(-/-) mice. The rate and pattern of proliferation and spontaneous cell death in the bcl-2(-/-) and bax(-/-) mice were not different from control mice. The epidermis of bcl-2(-/-) and bax(-/-) expressed sightly higher levels of cytokeratin 1 and loricrin compared to control littermates. The apoptotic response to ultraviolet-induced genotoxic stress was assessed by quantitating TUNEL positive cells. Bax(-/-) keratinocytes showed a significant resistance to UV-induced cell death compared to control mice. The life-span of bcl-2(-/-) mice precluded an assessment of bcl-2 gene disruption on in vivo tumourigenesis. A significant increase in tumour incidence was observed in bax(-/-) mice compared to control mice in two-step chemical carcinogenesis studies. These findings suggest that bcl-2 and bax gene products may be important determinants of normal keratinocyte differentiation and response to genotoxic stress in vivo, and indicate that bax may provide a tumour suppressor effect during skin carcinogenesis.
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Oh CK, Filler SG, Cho SH. Eukaryotic translation initiation factor-6 enhances histamine and IL-2 production in mast cells. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2001; 166:3606-11. [PMID: 11207322 DOI: 10.4049/jimmunol.166.5.3606] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Eukaryotic translation initiation factor (eIF)-6 is known to be important in ribosome biogenesis. Previously, we have discovered that eIF-6 mRNA is induced in lung in a murine model of asthma. We also found that there was enhanced eIF-6 expression in mast cells stimulated with PMA plus calcium ionophore. Therefore, we hypothesized that the induction of eIF-6 enhances the production of bioactive mediators by mast cells upon allergic stimulation. In the current study, we found that eIF-6 mRNA was rapidly induced in murine mast cells stimulated by Fc epsilon RI cross-linking, which is a major physiologic stimulant for mast cells. eIF-6 was also induced in human mast cells upon stimulation. The increase in eIF-6 gene expression in murine mast cells was blocked by therapeutic agents such as dexamethasone and cyclosporin A. To determine the location and function of eIF-6, murine mast cells were transfected with a construct that overexpressed enhanced green fluorescent protein-tagged eIF-6. These experiments demonstrated that eIF-6 was localized predominantly in the nucleolus of the mast cells. Also, overexpression of enhanced green fluorescent protein/eIF-6 enhanced the production of histamine and IL-2, but not IL-4 by stimulated murine mast cells. These results suggest that eIF-6 regulates the production of selected bioactive mediators in allergic diseases. This is the first demonstration of a biologic function of eIF-6 in mammalian cells.
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Kim YH, Kim JS, Cho SH. Strain distribution in the proximal human femur. An in vitro comparison in the intact femur and after insertion of reference and experimental femoral stems. THE JOURNAL OF BONE AND JOINT SURGERY. BRITISH VOLUME 2001; 83:295-301. [PMID: 11284584 DOI: 10.1302/0301-620x.83b2.10108] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Six pairs of human cadaver femora were divided equally into two groups one of which received a non-cemented reference implant and the other a very short non-dependent experimental implant. Thirteen strain-gauge rosettes were attached to the external surface of each specimen and, during application of combined axial and torsional loads to the femoral head, the strains in both groups were measured. After the insertion of a non-cemented femoral component, the normal pattern of a progressive proximal-to-distal increase in strains was similar to that in the intact femur and the strain was maximum near the tip of the prosthesis. On the medial and lateral aspects of the proximal femur, the strains were greatly reduced after implantation of both types of implant. The pattern and magnitude of the strains, however, were closer to those in the intact femur after insertion of the experimental stem than in the reference stem. On the anterior and posterior aspects of the femur, implantation of both types of stem led to increased principal strains E1, E2 and E3. This was most pronounced for the experimental stem. Our findings suggest that the experimental stem, which has a more anatomical proximal fit without having a distal stem and cortex contact, can provide immediate postoperative stability. Pure proximal loading by the experimental stem in the metaphysis, reduction of excessive bending stiffness of the stem by tapering and the absence of contact between the stem and the distal cortex may reduce stress shielding, bone resorption and thigh pain.
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Choi YH, Lee JK, Cho SH. Structure and expression of a CTP: phosphocholine cytidylyltransferase gene from Arabidopsis thaliana. Mol Cells 2001; 11:95-9. [PMID: 11266128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
A genomic clone, which includes the CTP: phosphocholine cytidylyltransferase (CCT) open reading frame and its 5'- and 3'- flanking non-coding regions, has been isolated from Arabidopsis thaliana and sequenced. The CCT gene is approximately 3.0 kb in length and contains 8 exons interrupted by 7 introns, which range from 74 to 626 nucleotides. All nucleotide sequences for the intron 3' splice sites are consistent with the consensus AG sequence of plant pre-mRNA processing, while the major GT consensus sequence for the 5' splice site is conserved in 5 of 7 introns. Introns 5 and 6 have a minor GC consensus sequence instead. In the 5'-flanking region there are two sequences related to a cold-responsive element found in the cold-inducible promoter of the A. thaliana cor15a gene, plus one gibberellin-response element. The results from reverse transcriptase-PCR indicate that the expression of A. thaliana CCT is regulated by temperature. The expression level of CCT increased after a 30-min treatment at 5 degrees C. When the plants were returned to 22 degrees C, the expression of CCT also decreased to the original level.
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Kim HY, Park HS, Kim YK, Son JW, Kim HA, Suh JH, Nahm DH, Cho SH, Min KU, Kim YY. Identification of IgE-binding components of citrus red mite in sera of patients with citrus red mite-induced asthma. J Allergy Clin Immunol 2001; 107:244-8. [PMID: 11174189 DOI: 10.1067/mai.2001.112123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Our previous investigations demonstrated that citrus red mite (CRM) antigen could cause IgE-mediated bronchoconstriction in exposed farmers working on citrus farms. OBJECTIVE This study was performed to confirm IgE-binding components and major allergens within the CRM antigens. METHODS Ten subjects who had been diagnosed as having CRM-induced asthma were enrolled. Serum-specific IgE antibodies to CRM antigens were measured by using an ELISA. To identify IgE-binding components and major allergens, SDS-PAGE, 2-dimensional PAGE, IgE-immunoblot analysis, and amino acid sequencing of major allergens were performed. RESULTS All the asthmatic subjects had high specific IgE antibodies to CRMs. Twelve percent SDS-PAGE analysis showed more than 10 protein bands ranging from 6 to 64 kd. SDS-PAGE and IgE-immunoblot analysis with each individual serum showed 5 IgE-binding components (11, 24, 35, 40, and 64 kd), with 2 (24 and 35 kd) of them bound in more than 50% of the study subjects. Two-dimensional PAGE and IgE-immunoblot analysis demonstrated that the major allergen at 24 kd had 2 bands with different isoelectric points of 4.75 and 5.1. Thirty-five kilodaltons had one band with an isoelectric point of 4.75. All amino acid sequencing of the 2 major allergens was performed, which was not homologous with any previously characterized allergens. CONCLUSION Five IgE-binding components and 2 major allergens (24 and 35 kd) were identified within the CRM antigen. The N-terminal amino acid sequence of the 2 major allergens (24 and 35 kd) was determined.
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Yoo HC, Cho SH, Ko SO. Modification of coagulation and Fenton oxidation processes for cost-effective leachate treatment. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2001; 36:39-48. [PMID: 11381784 DOI: 10.1081/ese-100000470] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Physicochemical processes have been used to remove nonbiodegradable organic compounds in leachate generated from sanitary landfills. In this study, a coagulation process combined with Fenton oxidation was evaluated for the removal of refractory organics in leachate. Recycling of sludge generated from Fenton oxidation to a coagulation process was attempted to reduce operation cost and to improve organic removal rate. The addition mode of Fenton reagent was also modified to obtain a better organic removal rate and more cost-effective operation. With Fenton sludge recycling, 9% higher COD removal was obtained, and the sludge to be disposed could be reduced up to 50%. Also, the coagulant could be reduced by 50%. For Fenton oxidation process, stepwise addition of reagents gave a 5% higher COD removal, and a 25% reduction in chemical consumption.
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Park JK, Kim YK, Lee SR, Cho SH, Min KU, Kim YY. Repeated exposure to low levels of sulfur dioxide (SO2) enhances the development of ovalbumin-induced asthmatic reactions in guinea pigs. Ann Allergy Asthma Immunol 2001; 86:62-7. [PMID: 11206242 DOI: 10.1016/s1081-1206(10)62358-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND Sulfur dioxide (SO2) is one of the major air pollutants. It is known to aggravate asthma symptoms in human beings, but few studies have focused on the effects of SO2 upon the development of bronchial asthma in animal models. OBJECTIVE This study was undertaken to evaluate the role of SO2 upon the development of ovalbumin (OA)-induced asthmatic reactions in guinea pigs. METHODS Guinea pigs were divided into four groups: (1) OA- and SO2-exposed group (n = 12), (2) SO2-exposed group (n = 12), (3) OA-exposed group (n = 11), and (4) saline-exposed group (n = 7). Guinea pigs of the first and second groups were exposed to 0.1 ppm SO2 for 5 hours a day on 5 consecutive days. Guinea pigs in the first and third groups inhaled 0.1% OA aerosols for 45 minutes a day on days 3, 4, and 5. One week after the sensitization procedure, all the guinea pigs underwent bronchial challenge with 1.0% OA aerosols, using unrestricted whole-body plethysmography. Bronchoalveolar lavage and histopathologic examination were performed 24 hours after the bronchial challenge. RESULTS Increases in enhanced pause (Penh), as an index of airway obstruction, after the bronchial challenge was significantly higher in OA- and SO2-exposed group (group 1) than the other groups (P < .05, respectively). Eosinophil counts in bronchoalveolar lavage fluids were also significantly higher in group 1 than in the other groups (P < .05, respectively). Histopathologic findings of bronchial and lung tissue in the group 1 showed an infiltration of inflammatory cells, bronchiolar epithelial damage, and mucus and cell plug in the lumen, but no significant abnormalities were observed in the other groups. CONCLUSIONS These results indicate that repeated exposure to low levels of sulfur dioxide may enhance the development of ovalbumin-induced asthmatic reactions in guinea pigs.
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Yoon CH, Cho SH, Kim SH, Ha SR. Catalytic wet air oxidation of p-nitrophenol (PNP) aqueous solution using multi-component heterogeneous catalysts. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2001; 43:229-236. [PMID: 11380184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This study investigated the decomposition of high strength p-nitrophenol (PNP) of 2,000 mg/l (3,400 mg of COD/1,250 mg of TOC) by catalytic wet air oxidation. Multi-component heterogeneous catalysts were used as catalysts for this purpose. The study results using a batch reactor showed that catalyst "D" (Mn-Ce-Zr 22.4 g plus CuSO4 1.0 g; Mn-Ce-Zr-Cu [CuSO4]) was more effective (56-74%) than catalyst "A" (Mn-Ce-Zr 22.4 g) under the given conditions (O2 partial pressure of 1.0 MPa; temperature of 170-190 degrees C; 30 min of reaction time). The best result was obtained when 2 g of Mn-Ce-Zr-Cu [CuSO4] was used per 1L of PNP aqueous solution. COD and TOC removal efficiencies were 18% and 23% without catalysts during 20 min of reaction at 190 degrees C. They were improved to 79% and 71% with 2 g/L of Mn-Ce-Zr-Cu [CuSO4] under the same conditions. The ratio of BOD5/COD was measured to evaluate biodegradability. It was 0.05 without catalyst and increased to 0.33 with 2 g/L of Mn-Ce-Zr-Cu [CuSO4] for 20 min of reaction.
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Kim H, Cho SH, Kang JW, Kim YD, Nan HM, Lee CH, Lee H, Kawamoto T. Urinary 1-hydroxypyrene and 2-naphthol concentrations in male Koreans. Int Arch Occup Environ Health 2001; 74:59-62. [PMID: 11196083 DOI: 10.1007/s004200000193] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
OBJECTIVE Urinary 1-hydroxypyrene (1-OHP) has been used as a biological marker of exposure to polycyclic aromatic hydrocarbons (PAHs), and urinary 2-naphthol is suggested as a new marker for route-specific exposure to airborne PAHs. We analyzed urinary 1-OHP and 2-naphthol concentrations in 292 male Koreans (129 university students and 163 shipyard workers) to define the distribution pattern in Koreans with no or low occupational exposure to PAHs. METHOD Histories of cigarette smoking and the eating of PAH-containing foods were obtained by a self-administered structured questionnaire. Urine samples were collected and urinary 1-OHP and 2-naphthol concentrations were measured using high-performance liquid chromatography (HPLC). RESULTS The arithmetic (geometric) means of urinary 1-OHP and 2-naphthol concentrations for all students, expressed as micromoles per mole of creatinine, were 0.04 (0.04) and 3.12 (2.22), for non-smokers 0.03 (0.03) and 1.78 (1.30) and for smokers 0.05 (0.03) and 4.36 (3.62), respectively. Among shipyard workers, the arithmetic (geometric) means of urinary 1-OHP and 2-naphthol concentrations were 0.69 (0.31) and 4.37 (2.62) for all, 0.27 (0.18) and 2.46 (1.16) for nonsmokers, and 0.97 (0.44) and 5.60 (4.44) for smokers, respectively. Mean urinary 1-OHP and 2-naphthol concentrations differed significantly between nonsmokers and smokers both in students and in shipyard workers. In smokers, some variables related to smoking habit were positively correlated with urinary 1-OHP and with 2-naphthol concentrations. The latter showed better correlations with the variables related to smoking amount than the former. None of the food-related factors was significantly correlated with urinary 1-OHP or 2-naphthol concentration. CONCLUSION These results suggest that urinary 2-naphthol concentration is more sensitively affected by smoking status than urinary 1-OHP concentration and that urinary 2-naphthol is a sensitive marker for low-level inhalation of PAHs.
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Kim YK, Oh HB, Oh SY, Cho SH, Kim YY, Min KU. HLA-DRB1*07 may have a susceptibility and DRB1*04 a protective effect upon the development of a sensitization to house dust mite Dermatophagoides pteronyssinus. Clin Exp Allergy 2001; 31:110-5. [PMID: 11167958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
BACKGROUND IgE responses to house dust mite-derived allergens seem to be the most important in the development of atopic asthma and rhinitis, but it has been difficult to demonstrate genetic control of the IgE response to the allergens. OBJECTIVE This study was undertaken to investigate the association between sensitization to house dust mite, D. pteronyssinus (DP), and genotypes of HLA-DRB1 alleles. METHODS DNAs were extracted from two groups of unrelated Koreans: (1) 178 with sensitization to DP; and (2) 99 age-matched non-atopic controls. Genotypes of the HLA-DRB1 alleles were determined using polymerase chain reaction (PCR)-based methods. RESULTS The frequency of HLA-DRB1*07 was significantly increased in the DP-sensitive subjects compared with the controls (15.7% vs 4.0%, P = 0.009). Conversely, the frequencies of HLA-DRB1*04 and *14 were decreased in the DP-sensitive subjects compared with the controls (27.5% vs 45.5%, P = 0.002; 13.5% vs 24.2%, P = 0.02). Of the DRB1*04 alleles, DRB1*0403 was significantly decreased in the DP-sensitive subjects compared with the controls (3.9% vs 13.1%, P = 0.005). No significant differences were found in the distributions of the other HLA-DRB1 alleles between the two groups. CONCLUSION HLA-DRB1*07 may have a susceptibility, and DRB1*04 and DRB1*14 may have a protective effect, upon the development of a sensitization to DP.
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Cho SH, Chin KH, Chen CW. Enhanced loop DNA folding induced by thymine-CH3 group contact and perpendicular guanine-thymine interaction. JOURNAL OF BIOMOLECULAR NMR 2001; 19:33-48. [PMID: 11246853 DOI: 10.1023/a:1008372701261] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A remarkable stabilizing effect induced by T-CH3 group and perpendicular guanine-thymine interactions in the DNA loop conformation has been demonstrated for the d(TTTG) loop structure using UV melting, high resolution NMR, distance geometry, and molecular dynamics studies. Contrary to the previously published d(TTCG) sequence that exhibits no specific inter-nucleotide interaction, we have found that d(TTTG), which differs only by one nucleotide with the d(TTCG) sequence (C7 --> T7), forms a rather stable and well-defined loop structure. Two characteristic structural features account for the stabilization of an otherwise flexible loop structure; the second loop T (T6) residue folds into the minor groove and engages in perpendicular interaction with the G8-NH2, while the third loop T (T7) residue stacks well upon the closing T5 x G8 wobble base pair and exhibits good contacts with many of the loop T5 and T6 sugar protons, which may form a hydrophobic core in the loop region. The importance of the bulky T7-CH3 was also proved by the UV melting study; while d(TTCG) hairpin exhibits a lower melting point (74.5 degrees C) than d(TTTG) hairpin (80.5 degrees C), d(TT(5-methyl)CG) hairpin resumes the same higher melting point (80 degrees C). Similarly, the fact that the melting temperature (74 degrees C) of d(TTTI) is lower than that of d(TTTG) indicates the critical role played by the G8-NH2 group. Our structural studies of the d(TTTG) loop indicate that DNA and RNA use a different strategy to establish stable tertiary folds. Comparison with several other pyrimidine-rich loop hairpins suggests that different minor-groove folding modes exist for the folding thymidine residue.
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Cho SH, Son JW, Koh YY, Min KU, Kim YY, Kim YK. Linkage between bronchial responsiveness to methacholine and gene markers of IL-4 cytokine gene cluster and T-cell receptor alpha/delta gene complex in Korean nuclear families. Clin Exp Allergy 2001; 31:103-9. [PMID: 11167957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
BACKGROUND Several candidate genes have been reported to be linked to intermediate phenotypes of asthma in Caucasian populations. OBJECTIVE To evaluate linkage between phenotypes of asthma and gene markers of high affinity IgE receptor-beta gene (D11S97), IL-4 cytokine gene cluster (IL-4R1), and T-cell receptor alpha/delta gene complex (D14S50) in Korean nuclear families. METHODS Nuclear families (127 probands and their 130 siblings) for the linkage analysis were ascertained through asthmatic children. Linkages between total serum IgE response, skin responses to common aeroallergens, and bronchial responsiveness to methacholine were performed using a sib-pair approach. RESULTS The square difference of the slope of the dose-response curve (DRS) between sib-pairs with two IL-4R1 identical alleles was smaller than with one or with neither IL-4R1 identical allele (P = 0.004). As for D14S50, the differences of DRS between sib-pairs with two identical alleles and with one identical allele were smaller than with neither identical alleles (P = 0.01). As for D11S97, no significant differences were observed among the groups with identical alleles of two, one or zero. With regard to total serum IgE levels, no significant linkage was found between this phenotype and the above three gene markers. As for skin responses to common aeroallergens, significant evidence was obtained to establish a linkage between this phenotype and the marker IL-4R1 (P = 0.01). However, no significant linkage was found between this phenotype and the markers D11S97 and D14S50. CONCLUSION The expression of bronchial responsiveness to methacholine may be influenced by genetic factors in the IL-4 cytokine gene cluster and/or T-cell receptor alpha/delta gene complex, but the genetic influence of the FcepsilonRI-beta gene may be minimal in the expression of bronchial responsiveness in Korean nuclear families.
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MESH Headings
- Adolescent
- Asthma/genetics
- Bronchial Hyperreactivity
- Child
- Child, Preschool
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 14/genetics
- Chromosomes, Human, Pair 5/genetics
- Female
- Genetic Linkage
- Humans
- Immunoglobulin E/immunology
- Interleukin-4/genetics
- Korea
- Male
- Methacholine Chloride/pharmacology
- Nuclear Family
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Skin/immunology
- Skin/pathology
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Koh YY, Jeong JH, Kim CK, Kim YK, Jee YK, Cho SH, Min KU, Kim YY. Atopic status and level of bronchial responsiveness in parents of children with acute bronchiolitis. J Asthma 2000; 37:709-17. [PMID: 11192236 DOI: 10.3109/02770900009087310] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
To examine whether children with a genetic predisposition to asthma are more likely to be afflicted with bronchiolitis, we studied 122 parents of infants who were hospitalized with the diagnosis of acute bronchiolitis (index group) and 120 parents of children who had never suffered from this disease (control group). The parents underwent bronchial challenge testing with methacholine and skin prick testing with common airborne allergens, and gave blood specimens for measurement of serum total IgE. There was no difference in atopic status, as assessed by the prevalence of atopy (at least one positive response to the allergens tested) or by serum total IgE levels, between index and control parents. The prevalence of bronchial hyperresponsiveness (BHR) (concentration of methacholine causing a 20% reduction in forced expiratory volume in 1 sec [PC20] < 18 mg/mL) was higher in index parents than in control parents (17.2% vs. 7.5%, p = 0.02). Bronchial responsiveness (BR) index was significantly higher in index parents than in control parents (1.135 +/- 0.088 vs. 1.104 +/- 0.071, p < 0.01). Parents of children who were hospitalized with acute bronchiolitis showed a higher level of BR, but not atopy. This suggests that in terms of BHR, there may be a genetic predisposition to the development of bronchiolitis.
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Kim YK, Park HW, Park HS, Kim HY, Kim SH, Bai JM, Cho SH, Kim YY, Min KU. Sensitivity to citrus red mite and the development of asthma. Ann Allergy Asthma Immunol 2000; 85:483-8. [PMID: 11152170 DOI: 10.1016/s1081-1206(10)62576-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND OBJECTIVE The citrus red mite (Panonychus citri, CRM) is an important allergen in the development of asthma and/or rhinitis in citrus farmers and a common sensitizing allergen among exposed children. The aim of this study was to evaluate CRM-induced skin responses and serum-specific IgE, IgG4, and IgG1 responses, and their role in the development of asthmatic symptoms among exposed adolescents. METHODS A total of 100 adolescents between the ages of 15 and 16 years (59 males and 41 females) were randomly recruited. All of the subjects responded to the ISAAC questionnaire themselves. Skin prick tests to CRM were carried out and serum-specific IgE, IgG4, and IgG1 levels were measured using ELISA. RESULTS Fourteen subjects (14%) had experienced wheezing during last 12 months. The wheal size formed by CRM was larger than 3 mm in 23 subjects (23%). Serum-specific IgE levels were elevated in 21 subjects (21%), IgG4 levels were elevated in 32 subjects (32%), and IgG1 levels were elevated in five subjects (5%). The prevalence of wheezing during last 12 months was significantly higher in subjects with positive skin responses and serum-specific IgE responses induced by CRM than in those with negative skin responses and low serum IgE responses (30.4% versus 9.0%, P < .05; 33.3% versus 8.7%, P < .05). The prevalence of wheezing, however, did not differ according to serum-specific IgG4 levels (9.4% versus 16.2%, P > .05). Skin responses to CRM showed a significant correlation with serum-specific IgE levels, but not with IgG1 and IgG4 levels. Serum CRM-specific IgE levels correlated with specific IgG1 and IgG4 levels, but no significant correlation was found between serum IgG1 and IgG4 levels. CONCLUSION The specific IgE responses induced by CRM were prevalent among adolescents living near citrus farms, and may be important in the development of asthma. The specific IgG4 and IgG responses induced by CRM play a minimal role in the development of asthma symptoms.
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Ko GY, Byun JY, Choi BG, Cho SH. The vascular manifestations of Behçet's disease: angiographic and CT findings. Br J Radiol 2000; 73:1270-4. [PMID: 11205670 DOI: 10.1259/bjr.73.876.11205670] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The purpose was to evaluate angiographic and CT manifestations of vascular Behçet's disease. The medical records of 64 patients with Behçet's disease, treated in our hospital during the last 4 years, were reviewed. 37 patients underwent angiography or CT in the symptomatic regions because of symptoms or clinical signs of vascular involvement by Behçet's disease. 33 (male:female ratio 28:5; mean age 35 years) of the 37 patients demonstrated vascular involvement, which was surgically proven (18 patients) or diagnosed on angiography (15 patients). Angiograms and CT images of these 33 patients were retrospectively analysed for lesion type, location, extent and other characteristic findings of vascular involvement. 12 patients had only venous lesions, 11 had only arterial lesions and 10 had both arterial and venous lesions. The major angiographic findings of vascular Behçet's disease were acute or chronic thrombosis in deep veins of the lower extremities (19 patients), in the inferior vena cava (4 patients) and in the superior vena cava (2 patients), pseudoaneurysms of large or medium sized arteries (11 patients), and occlusions/ stenoses of distal run-off arteries (13 patients). Common CT findings were obliterated deep veins (8 patients) and non-calcified thickened aneurysmal walls (9 patients), with or without contrast enhancement. The combination of these angiographic and CT findings with clinical manifestations are helpful in distinguishing vascular Behçet's disease from other vasculitides.
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Seo JS, Lee SY, Won KJ, Kim DJ, Sohn DS, Yang KM, Cho SH, Park JD, Lee KH, Kim HD. Relationship between normal heart size and body indices in Korean. J Korean Med Sci 2000; 15:641-6. [PMID: 11194190 PMCID: PMC3054707 DOI: 10.3346/jkms.2000.15.6.641] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
We provided a curve-fit equation to predict the normal heart weight (g) in Koreans by examining 422 autopsies (215 males and 207 females, from newborn to age 77 yr) who were relatively in good general condition. Heart weight was well correlated with body surface area (m2), body weight (kg), and body height (cm) but poorly with age in both sex. Heart weight progressively increased from birth to the earlier 3rd and 4th decades in male and female, respectively, and then gradually decreased; mean heart weight of all age group was greater in male than in female and significantly different from birth to 4th decade. In both sex, heart weight exponentially increased in accordance with the increase of body height, body weight, and body surface (in male, heart weight=0.00312 x body height(2.239), r2=0.750, p<0.0001; in female, heart weight=0.00443 x body height(2170), r2=0.781, p<0.0001; in male, heart weight=9.22 x body weight(0.853), r2=0.770, p<0.0001; in female, heart weight=9.00 x body weight0.855, r2=0.820, p<0.0001; in male, heart weight=155.18 x body surface area1.290, r=0.808, p<0.0001; in female, heart weight=124.13 x body surface area1.242, r=0.834, p<0.0001). These results indicate that heart weight is better correlated with body surface area than with body weight; however, body weight should be a better determinant of a predicted heart weight, since body surface area is entirely dependent on body height and body weight.
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Yang JE, Kim KM, Kang H, Cho SH, Park YM. Multiple trichoepithelioma with secondary localized amyloidosis. Br J Dermatol 2000; 143:1343-4. [PMID: 11122062 DOI: 10.1046/j.1365-2133.2000.03930.x] [Citation(s) in RCA: 7] [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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Kim BW, Cho SH, Rha SE, Choi H, Choi KY, Cha SB, Choi MG, Chung IS, Sun HS, Park DH. Esophagomediastinal fistula and esophageal stricture as a complication of esophageal candidiasis: a case report. Gastrointest Endosc 2000; 52:772-5. [PMID: 11115916 DOI: 10.1067/mge.2000.108922] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Cho SH, Kim YK, Oh HB, Jung JW, Son JW, Lee MH, Jee HS, Kim YY, Min KU. Association of HLA-DRB1(*)07 and DRB1(*)04 to citrus red mite (Panonychus citri) and house dust mite sensitive asthma. Clin Exp Allergy 2000; 30:1568-75. [PMID: 11069565 DOI: 10.1046/j.1365-2222.2000.00915.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Specific IgE responses to allergens provide useful models for evaluating the genetic factors that control human immune responses. A recent survey demonstrated that the citrus red mite (Panonychus citri, CRM) is the most important allergen in the development of asthma in citrus farmers. OBJECTIVE The aim of this study was to evaluate whether susceptibility or resistance to CRM-induced asthma was associated with HLA-DRB1 gene. METHODS DNAs were extracted from two groups of unrelated Korean adults living around citrus farms: (1) Ninety-one adults with CRM-sensitive asthma; and (2) 98 exposed, healthy nonatopic controls. Genotypes of HLA-DRB1 alleles were carried out using PCR-based methods. RESULTS Allelic frequency of HLA-DRB1(*)07 was higher in the CRM-sensitive asthmatics compared to the controls (17.6% vs 4.1%, Pc = 0.01). Conversely, the frequency of DRB1*04 was lower in the CRM-sensitive asthmatics compared to the controls (19.8% vs 40.8%, Pc = 0.01). No significant difference was found in the distributions of the other HLA-DRB1 gene-encoded antigens between the two groups. CONCLUSION HLA-DRB1 genes may be involved in the development of CRM-induced asthma. In addition, HLA-DR7 may increase, and DR4 decrease, the risk of developing the asthma in CRM-exposed adults.
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Kim JY, Jung WH, Yoon CS, Kim MJ, Kim HK, Kim KD, Cho SH. Mesenchymal hamartomas of the chest wall in infancy: radiologic and pathologic correlation. Yonsei Med J 2000; 41:615-22. [PMID: 11079622 DOI: 10.3349/ymj.2000.41.5.615] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Mesenchymal hamartoma of the chest wall is a rare tumor with about 53 reported cases in the English literature. We reviewed six chest wall mesenchymal hamartomas in four patients, including two cases with multiple lesions, with specific focus on the radiologic and pathologic correlation. All cases occurred in neonates or infants with ages ranging from seven hours to seven months. They were diagnosed with plain chest radiographs (n=6), ultrasonography (n=2), chest CT scan (n=6), whole body bone scan (n=2) and MRI (n=3). All cases except a small one without cystic change showed the typical features of mesenchymal hamartoma radiographically and pathologically. Radiologically they were well-circumscribed masses with solid and cystic components with multiple fluid-fluid levels in association with single or multiple rib destruction or change. The CT scan showed the typical findings of chest wall hamartoma, and the MR showed heterogeneous signal intensities of the mass on T1- and T2-weighted images. The MR also revealed more concisely a secondary aneurysmal bone cyst formation with multiple fluid-fluid levels on the T2-weighted image. Microscopically, they showed alternating areas of cartilaginous islands and primitive appearing mesenchymal proliferation, which corresponded well with the solid component on the radiologic findings. The areas of bone formation and blood-filled cystic spaces matched the calcified or ossified densities and the cystic components, respectively. A small case without cystic change showed peculiar radiological and pathological findings resembling an osteochondroma. In conclusion, mesenchymal hamartoma of the chest wall in infancy is quite rare and sometimes can be misdiagnosed as malignancy due to the bone-destroying radiographic appearance and the highly cellular and mitotically active microscopic features, unless the radiologists and pathologists are aware of the characteristic clinical, radiological, and pathological findings. Imaging studies can usually make a correct diagnosis with good correlation to the pathologic findings.
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Manoharan K, Chae HS, Cha JM, Cho SH, Shin SH, Cho BH, Lee WS. Synthesis of phosphatidylserine in carrot cells cultured under carbon-source starvation. PLANT & CELL PHYSIOLOGY 2000; 41:1143-1148. [PMID: 11148273 DOI: 10.1093/pcp/pcd041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
When carrot suspension cells were cultured on medium containing no carbon source (starvation), the levels of phosphatidylserine (PS) increased transiently 3-4 d after the initiation of starvation while levels of most other phospholipid (PL) species decreased. We previously reported that fatty acids of these PLs served as an alternative carbon source during starvation. The present study showed that cells possess two different biosynthetic pathways involving phosphatidylcholine (PC)/phosphatidylethanolamine (PE) exchange enzymes and PS synthase to synthesize PS. These activities peaked similarly 4 d after the initiation of starvation and coincided with the peak of PS level. The synthesis of serine was also significantly activated during starvation. The activity of phosphoserine aminotransferase (PSAT) which is involved in serine synthesis increased with a time course similar to that of the increase in the PS level. These observations suggest that the increase in PS level plays an important role in membranes which are degraded during starvation.
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Kim CY, Cho SH. Institutionalization of quality improvement programs in Korean hospitals. Int J Qual Health Care 2000; 12:419-23. [PMID: 11079222 DOI: 10.1093/intqhc/12.5.419] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVE To investigate the institutionalization of quality improvement (QI) programs in Korean hospitals, in which organizational efforts to improve the quality of care have been made only recently. DESIGN A cross-sectional study based upon an initial telephone contact and follow-up mail survey. STUDY PARTICIPANTS All hospitals with 400 beds or more, 100 as of 1997, were contacted in the initial telephone survey. The survey questionnaire was then sent to all of 28 hospitals found to have a QI department; 26 hospitals returned the completed questionnaire. RESULTS Hospitals that had larger bed capacities, that provided tertiary levels of care or that were in urban areas were found to have a higher tendency to establish QI departments. These QI departments most frequently cited improvement of patient satisfaction as one of their overall missions. They also reported that their most important responsibilities were monitoring performance and preparing for the two national Korean hospital assessment programs. Participating in these hospital assessment programs helped them to initiate and develop their QI activities. The main difficulties they had in performing their QI programs stemmed from lack of knowledge and resources. These survey findings indicate that hospital assessment programs significantly aided Korean hospitals to institutionalize their QI programs. At the same time, the survey data indicate that the hospital assessment programs may emphasize short-term benefits from QI activities at the expense of long-term QI institutionalization. CONCLUSION QI programs have not as yet been fully institutionalized in Korean hospitals. More support for QI structure and organizational preparation at both the national and organizational levels will be needed.
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Cho SH, Tam SW, Demissie-Sanders S, Filler SA, Oh CK. Production of plasminogen activator inhibitor-1 by human mast cells and its possible role in asthma. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2000; 165:3154-61. [PMID: 10975829 DOI: 10.4049/jimmunol.165.6.3154] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The plasminogen activator inhibitor type 1 (PAI-1) has an essential role in tissue remodeling. The PAI-1 gene was induced by a combination of phorbol ester and calcium ionophore at the highest level among the inducible human mast cell genes that we have analyzed on a DNA microarray. PAI-1 was secreted by both a human mast cell line (HMC)-1 and primary cultured human mast cells upon stimulation, whereas PAI-1 was undetectable in either group of unstimulated cells. The secretion of PAI-1 was due to de novo synthesis of PAI-1 rather than secretion of preformed PAI-1. The functional significance of PAI-1 secretion was demonstrated by complete inhibition of tissue-type plasminogen activator activity with supernatants of stimulated HMC-1 cells. Furthermore, we were able to regulate PAI-1 gene expression in HMC-1 cells by known therapeutic agents. High-dose (1 microM) dexamethasone induced PAI-1 mRNA expression. Cyclosporin down-regulated the expression of the PAI-1 gene. Cycloheximide abrogated PAI-1 mRNA expression, suggesting that transcription of the PAI-1 gene requires de novo synthesis of early gene products, including transcription factors. Finally, we demonstrated PAI-1 in lung mast cells from a patient with asthmatic attack by double-immunofluorescence study. This is the first report demonstrating that activated human mast cells release a striking amount of functionally active PAI-1. These results suggest that PAI-1 could play an important role in airway remodeling of asthma, and inhibition of PAI-1 activity could represent a novel therapeutic approach in the management of airway remodeling.
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Choi YH, Lee JK, Lee CH, Cho SH. cDNA cloning and expression of an aminoalcoholphosphotransferase isoform in Chinese cabbage. PLANT & CELL PHYSIOLOGY 2000; 41:1080-4. [PMID: 11100782 DOI: 10.1093/pcp/pcd030] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Aminoalcoholphosphotransferase (AAPT) catalyzes the synthesis of phosphatidylcholine and phosphatidylethanolamine from diacylglycerol plus a CDP-aminoalcohol such as CDP-choline or CDP-ethanolamine. Previously we reported the cloning of a cDNA encoding this enzyme from Chinese cabbage roots, and suggested the presence of possible isoforms [Min et al. (1997) J. Plant Biol. 40: 234]. We now report the cDNA cloning and expression analysis of a second AAPT from Chinese cabbage. This AAPT cDNA, AAPT2, contains an open reading frame of 1,170 bp coding for a protein of 389 amino acids. It shares 95% identity and 96% similarity with Chinese cabbage AAPT1 at the deduced amino acid level. The results from reverse transcriptase-PCR indicate that expression of AAPT2 is regulated temporally and up-regulated by low temperature.
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Song HR, Dhar S, Na JB, Cho SH, Ahn BW, Ko SM, Suh SW, Koo KH. Classification of metaphyseal change with magnetic resonance imaging in Legg-Calvé-Perthes disease. J Pediatr Orthop 2000; 20:557-61. [PMID: 11008730 DOI: 10.1097/00004694-200009000-00002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Seventy-eight patients (85 affected hips and 71 unaffected hips) with Legg-Calvé-Perthes disease were included in this study to evaluate the metaphyseal change in radiographs and magnetic resonance imaging (MRI) and to define the type of the metaphyseal cyst according to presence or absence of the epiphyseal involvement. The content of the metaphyseal cyst was evaluated by using T1,T2, proton, and gadolinium-enhanced T1-weighted MRI scans. Among 85 hips, there were no changes in 32 hips, marrow edema in 13 hips, false cyst with epiphyseal involvement in 28 hips, and true cyst without epiphyseal involvement in 12 hips. Granulation tissue was found in the false cysts and water-rich fibrotic tissue was found in the true cysts based on the MRI scans. The metaphyseal change in MRI scans was shown in 71% of groups 3 and 4 and in 35% of groups 1 and 2 according to the Catterall classification, and 52% of group A, 56% of group B, and 86% of group C according to the Herring classification. Of the 30 hips at the avascular stage, 33% showed metaphyseal cyst in MRI scans. Of the 53 hips at the fragmentation stage, 60% showed the metaphyseal cyst.
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Lee MH, Cho SH, Park HS, Bahn JW, Lee BJ, Son JW, Kim YK, Koh YY, Min KU, Kim YY. Citrus red mite (Panonychus citri) is a common sensitizing allergen among children living around citrus orchards. Ann Allergy Asthma Immunol 2000; 85:200-4. [PMID: 11030274 DOI: 10.1016/s1081-1206(10)62467-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
BACKGROUND A recent investigation has suggested that Panonychus citri (citrus red mite) is the most common causative allergen in citrus-cultivating farmers with asthma or allergic rhinitis. OBJECTIVE A cross-sectional survey was performed to evaluate the prevalence of asthma and sensitization to P. citri among children living around citrus orchards. METHODS A total of 1,055 children living around citrus orchards were enrolled. There were 544 boys and 511 girls with a mean age of 12.3 (range 7 to 16) years. They were evaluated by the ISAAC questionnaire, and a skin prick test with 13 common aeroallergens including P. citri and Japanese cedar pollen. Children who recorded ever having experienced wheezing on the questionnaire were evaluated by methacholine bronchial provocation test and determined to have asthma if they showed bronchial hyperresponsiveness to methacholine simultaneously. RESULTS The positive skin test response to one or more inhalant allergens except P. citri was 35.5%, but when including P. citri, the positive response increased to 37.7%. The most common sensitizing allergens in the order of decreasing frequency were Dermatophagoides pteronyssinus (26.6%), D. farinae (22.7%), P. citri (14.2%), cockroach (11.3%), and Japanese cedar pollen (9.7%). Among the children without sensitization to house dust mites, the sensitization rate to P. citri was significantly higher in those 13 and over than in those under 12 (5.8% versus 2.5%, P < .05). The prevalence of asthma was not different between the children with sensitization to P. citri and those without it (5.4% versus 4.0%, P > .05), although the prevalence was higher in those with sensitization to D. pteronyssinus or D. farinae than in those without sensitization to these allergens (7.9% versus 2.9%, P < .05; 9.7% versus 2.6%, P < .05). CONCLUSION Citrus red mite is a common sensitizing allergen among children living around citrus orchards. The features of sensitization and development of asthma are different between citrus red mite and house dust mites.
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Choi BK, Cho SH, Bai GH, Kim SJ, Hyun BH, Choe YK, Bae YS. Prevention of encephalomyocarditis virus-induced diabetes by live recombinant Mycobacterium bovis bacillus Calmette-Guérin in susceptible mice. Diabetes 2000; 49:1459-67. [PMID: 10969829 DOI: 10.2337/diabetes.49.9.1459] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The D variant of encephalomyocarditis (EMC-D) virus causes diabetes in susceptible mice by direct cytolysis of pancreatic beta-cells. cDNA covering the major outer capsid protein (VP1) of the EMC-D virus was cloned into Mycobacterium bovis bacillus Calmette-Guerin (BCG). None of the SJL/J mice immunized with live recombinant BCG-VP1 (rBCG-VP1) became diabetic when challenged with the highly diabetogenic EMC-D virus, but the control mice inoculated with normal BCG developed diabetes during the same challenge. VP1-specific antibodies (including neutralizing antibodies) were markedly increased over time and reached the maximum titer at week 10 after a single immunization. The plateau of the titer lasted longer than 4 weeks. Mice and guinea pigs immunized with live rBCG-VP1 showed strong delayed-type hypersensitivity to the VP1 of the EMC-D virus. The preventive immunity still worked effectively 10 months after the primary immunization. At that time, the VP1-specific antibody was almost undetectable in the bloodstream, but a large number of VP1-specific lymphocytes was found in the spleen of the immunized mice. Our results show that live rBCG-VP1 elicits effective humoral and long-lasting cellular immune responses against EMC-D virus infection that results in the prevention of virus-induced diabetes in susceptible mice.
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Park HS, Kim HY, Kim YK, Son JW, Nahm DH, Cho SH, Min K, Kim YY. Specific IgG1 and IgG4 antibodies to citrus red mite in citrus farmers: a study of their relationship to respiratory symptoms. J Korean Med Sci 2000; 15:407-12. [PMID: 10983688 PMCID: PMC3054667 DOI: 10.3346/jkms.2000.15.4.407] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Citrus red mite (CRM) is known as the most common sensitizing allergen in subjects with asthma and rhinitis working on citrus farms. The aim of this study is to evaluate the role of specific IgG1 (slgG1) and specific IgG4 (slgG4) to CRM in citrus farmers. Questionnaire survey and skin prick test including CRM antigen was done by 136 workers. Specific IgE (slgE), slgG1 and slgG4 to CRM were detected by enzyme-linked immunosorbent assay (ELISA). CRM-sensitive-asthma was diagnosed upon presence of asthmatic symptoms by questionnaire, airway hyperresponsiveness to methacholine and slgE to CRM. CRM-sensitive rhinitis was diagnosed upon presence of rhinitis symptoms and slgE to CRM. Eleven (8.1%) had CRM-sensitive asthma and 25 (18.4%) had CRM-sensitive rhinitis. Significant association was noted between presence of asthmatic symptoms and slgE or slgG4 (p<0.05, respectively), while no significant association was noted in slgG1 (p>0.05). Significant association was noted in the prevalence between slgG4 and slgE (p<0.05), while no significant association was noted between slgG1 and slgG4 or slgE (p<0.05, respectively). There was a significant correlation between slgE and slgG4 level (r=0.39, p<0.05). These findings suggest that the presence of slgG1 to CRM is response to CRM exposure, and further studies will be needed to evaluate the role of slgG4.
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Min KU, Kim YK, Park HS, Lee MH, Lee BJ, Son JW, Kim YY, Cho SH. Bronchial responsiveness to methacholine is increased in citrus red mite (Panonychus citri)-sensitive children without asthmatic symptoms. Clin Exp Allergy 2000; 30:1129-34. [PMID: 10931120 DOI: 10.1046/j.1365-2222.2000.00862.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND A recent investigation has suggested that citrus red mite (Panonychus citri, CRM) is a common sensitizing allergen among children living around citrus farms. OBJECTIVE A cross-sectional survey was performed to evaluate the bronchial responsiveness to methacholine in CRM-sensitive children without asthmatic symptoms. SUBJECTS AND METHODS A total of 375 children living around citrus farms were enrolled in this study. There were 201 boys and 174 girls with a mean age of 12.5 (range 7-16) years. Each subject was evaluated by a questionnaire, a skin prick test with 13 common inhalant allergens including CRM, and a methacholine bronchial provocation test (MBPT). RESULTS Positive rate of MBPT (PC20-methacholine < 25 mg/mL) was higher in atopic rhinitic and atopic control children than in nonatopic rhinitic and nonatopic control subjects (41.3% and 33.3% vs 17.2% and 15.4%, respectively, both P < 0.05). Slope of dose-response curve (DRS, %/mg/mL) was higher in atopic rhinitic children than in nonatopic rhinitic, atopic control and nonatopic control subjects (14.3 +/- 0.87 vs 9.4 +/- 0.72, 10.0 +/- 1.37 and 9.2 +/- 1.51, P < 0.05, respectively). Both the positive rate of MBPT and the DRS were increased in children with positive skin response to CRM than in those without sensitization (48.2% vs 22.9%, P = 0.0001; 15.6 +/- 1.26 vs 10.2 +/- 0.65, P = 0.0001). CONCLUSION Bronchial responsiveness is increased in citrus red mite-sensitive children even if they have no asthmatic symptoms.
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Bae JY, Choi BO, SunWoo IN, Kim DI, Cho SH, Kim TS. Diffuse cerebrospinal gliomatosis with extensive leptomeningeal spread. Yonsei Med J 2000; 41:517-21. [PMID: 10992815 DOI: 10.3349/ymj.2000.41.4.517] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
A case of diffuse cerebrospinal gliomatosis with extensive leptomeningeal spread is presented. The patient, an 18-year-old girl, was admitted due to progressive weakness and paresthesia of both legs, following rapid neuropsychiatric deterioration. An initial magnetic resonance imaging (MRI) study of the T-spine showed diffuse high signal intensities from T9 to T12 spinal cords on a T2 sagittal image and diffuse cord bulging at T1WI. This suggested an inflammatory lesion such as tuberculosis or fungal meningoencephalitis. A limited autopsy was performed. A microscopic examination revealed multifocal GFAP-positive astrocytic proliferations that were low grade astrocytoma in the cerebral leptomeninges, parietal, occipital and temporal lobes and anaplastic astrocytoma in the spinal cord and spinal leptomeninges. The high proliferative indices of the spinal lesion and aneuploidy correspond to a diagnosis of malignant astrocytoma and a rapid fatal clinical course.
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Lee JJ, Chung IJ, Park MR, Yang DH, Cho SH, Ryang DW, Kim HJ. Acquired hemophilia successfully treated with oral immunosuppressive therapy. Korean J Intern Med 2000; 15:135-7. [PMID: 10992727 PMCID: PMC4531764 DOI: 10.3904/kjim.2000.15.2.135] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Acquired hemophilia is a rare disorder associated with serious bleeding in nonhemophilic patients. We had a 40-year-old woman who was diagnosed as acquired hemophilia with a factor VIII inhibitor level of 27.5 BU/mL. She was presented with gross hematuria and severe right shoulder pain, and was successfully treated with daily oral cyclophosphamide and prednisone for 2 weeks. After the remission, the doses of prednisone and cyclophosphamide were slowly decreased and she remained in complete remission without further bleeding episodes.
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Cho SH, Kim HT, Lee IJ, Kim MS, Park HJ. Influence of phonation on basement membrane zone recovery after phonomicrosurgery: a canine model. Ann Otol Rhinol Laryngol 2000; 109:658-66. [PMID: 10903048 DOI: 10.1177/000348940010900709] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The process of wound healing at the basement membrane zone of the vocal folds after phonomicrosurgery was investigated. The influence of phonation and the implied optimal period of voice rest were considered. Phonomicrosurgery was performed on both vocal folds of 20 adult dogs. In 10 dogs, the left recurrent laryngeal nerve was simultaneously resected to simulate iatrogenic voice rest; the remaining 10 dogs were allowed to phonate normally. The healing process of the vocal folds of each group was observed at 1, 2, 4, 8, and 12 weeks after surgery with immunohistochemical staining and transmission electron microscopy. In the voice rest group, the basement membrane was completely re-formed in 2 weeks, and the "cover" appeared completely rearranged by 8 weeks. The results of the phonation group were characterized by a delayed healing process and basement membrane changes. These results suggest that voice rest of at least 2 weeks after surgery may be beneficial and that vocal hygiene should be maintained for as long as 8 weeks.
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Jeon TJ, Lee JD, Ha JW, Yang WI, Cho SH. Evaluation of cardiac adrenergic neuronal damage in rats with doxorubicin-induced cardiomyopathy using iodine-131 MIBG autoradiography and PGP 9.5 immunohistochemistry. EUROPEAN JOURNAL OF NUCLEAR MEDICINE 2000; 27:686-93. [PMID: 10901455 DOI: 10.1007/s002590050563] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Doxorubicin is one of the most useful anticancer agents, but its repeated administration can induce irreversible cardiomyopathy as a major complication. The purpose of this study was to investigate doxorubicin toxicity on cardiac sympathetic neurons using iodine-131-metaiodobenzylguanidine (MIBG) and protein gene product (PGP) 9.5 immunohistochemistry, which is a marker of cardiac innervation. Wistar rats were treated with doxorubicin (2 mg/kg, i.v.) once a week for 4 (n=5), 6 (n=6) or 8 (n=7) weeks consecutively. Left ventricular ejection fraction (LVEF), calculated by M-mode echocardiography, was used as an indicator of cardiac function. Plasma noradrenaline (NA) concentration was measured by high-performance liquid chromatography (HPLC). 131I-MIBG uptake of the left ventricular wall (24 ROIs) was measured by autoradiography. 131I-MIBG uptake pattern was compared with histopathological results, the neuronal population on PGP 9.5 immunohistochemistry and the degree of myocyte damage assessed using a visual scoring system on haematoxylin and eosin and Masson's trichrome staining. LVEF was significantly decreased in the 8-week group (P<0.05). The serum NA level also showed no statistical difference until 4 weeks and was significantly increased in the 8-week group (P<0.05). MIBG uptake was decreased in the 6- and 8-week groups (P<0.05), and was closely correlated with the reduction in the number of nerve fibres on PGP 9.5 stain. Myocyte damage was seen only in the 8-week group. Neuronal population and the 131I-MIBG uptake ratio of subepicardium to subendocardium were significantly increased (P<0.05) in the 8-week group as compared with the control group. It may be concluded that radioiodinated MIBG is a reliable marker for the detection of cardiac adrenergic neuronal damage in doxorubicin-induced cardiomyopathy; it detects such damage earlier than do other clinical parameters and in this study showed a good correlation with the reduction in the neuronal population on PGP 9.5 stain. The subendocardial layer appeared to be more vulnerable to doxorubicin than the subepicardium.
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