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Park SA, Byeon G, Jhoo JH, Kim HC, Lim MN, Jang JW, Bae JB, Han JW, Kim TH, Kwak KP, Kim BJ, Kim SG, Kim JL, Moon SW, Park JH, Ryu SH, Youn JC, Lee DW, Lee SB, Lee JJ, Lee DY, Kim KW. A Preliminary Study on the Potential Protective Role of the Antioxidative Stress Markers of Cognitive Impairment: Glutathione and Glutathione Reductase. Clin Psychopharmacol Neurosci 2023; 21:758-768. [PMID: 37859449 PMCID: PMC10591176 DOI: 10.9758/cpn.23.1053] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 04/28/2023] [Accepted: 05/17/2023] [Indexed: 10/21/2023]
Abstract
Objective : To investigate the relationship between reduced glutathione (GSH), a key molecule of the antioxidant defense system in the blood, and glutathione reductase (GR), which reduces oxidized glutathione (glutathione disulfide [GSSG]) to GSH and maintains the redox balance, with the prevalence of Alzheimer's dementia and cognitive decline. Methods : In all, 20 participants with Alzheimer's dementia who completed the third follow-up clinical evaluation over 6 years were selected, and 20 participants with normal cognition were selected after age and sex matching. The GSH and GR concentrations were the independent variables. Clinical diagnosis and neurocognitive test scores were the dependent variables indicating cognitive status. Results : The higher the level of GR, the greater the possibility of having normal cognition than of developing Alzheimer's dementia. Additionally, the higher the level of GR, the higher the neurocognitive test scores. However, this association was not significant for GSH. After 6 years, the conversion rate from normal cognition to cognitive impairment was significantly higher in the lower 50th percentile of the GR group than in the upper 50th percentile. Conclusion : The higher the GR, the lower the prevalence of Alzheimer's dementia and incidence of cognitive impairment and the higher the cognitive test scores. Therefore, GR is a potential protective biomarker against Alzheimer's dementia and cognitive decline.
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Affiliation(s)
- Sang-a Park
- Department of Psychiatry, Kangwon National University Hospital, Chuncheon, Korea
| | - Gihwan Byeon
- Department of Psychiatry, Kangwon National University Hospital, Chuncheon, Korea
| | - Jin Hyeong Jhoo
- Department of Psychiatry, Kangwon National University Hospital, Chuncheon, Korea
- Department of Psychiatry, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Hyung-Chun Kim
- College of Pharmacy, Kangwon National University, Chuncheon, Korea
| | - Myoung-Nam Lim
- Biomedical Research Institute, Kangwon National University Hospital, Chuncheon, Korea
| | - Jae-Won Jang
- Department of Neurology, Kangwon National University Hospital, Chuncheon, Korea
- Department of Neurology, Kangwon National University School of Medicine, Chuncheon, Korea
| | - Jong Bin Bae
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Ji Won Han
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Tae Hui Kim
- Department of Psychiatry, Yonsei University Wonju Severance Christian Hospital, Wonju, Korea
| | - Kyung Phil Kwak
- Department of Psychiatry, Dongguk University Gyeonju Hospital, Gyeongju, Korea
| | - Bong Jo Kim
- Department of Psychiatry, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Shin Gyeom Kim
- Department of Neuropsychiatry, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Jeong Lan Kim
- Department of Psychiatry, School of Medicine, Chungnam National University, Daejeon, Korea
| | - Seok Woo Moon
- Department of Psychiatry, Konkuk University Chungju Hospital, School of Medicine, Konkuk University, Chungju, Korea
| | - Joon Hyuk Park
- Department of Neuropsychiatry, Jeju National University Hospital, Jeju, Korea
| | - Seung-Ho Ryu
- Department of Neuropsychiatry, Konkuk University Hospital, Seoul, Korea
| | - Jong Chul Youn
- Department of Neuropsychiatry, Kyunggi Provincial Hospital for the Elderly, Yongin, Korea
| | - Dong Woo Lee
- Department of Neuropsychiatry, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Seok Bum Lee
- Department of Psychiatry, Dankook University Hospital, Cheonan, Korea
| | - Jung Jae Lee
- Department of Psychiatry, Dankook University Hospital, Cheonan, Korea
| | - Dong Young Lee
- Department of Neuropsychiatry, Seoul National University Hospital, Seoul, Korea
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Korea
| | - Ki Woong Kim
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Korea
- Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Brain and Cognitive Science, Seoul National University College of Natural Sciences, Seoul, Korea
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Smith LH, Park SA, Gjeltema J, Moore BA. Two is not necessarily better than one: A double lens in a pre-metamorphic adult axolotl (Ambystoma mexicanum). Vet Ophthalmol 2023; 26:176-179. [PMID: 36152337 PMCID: PMC10036263 DOI: 10.1111/vop.13027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 09/14/2022] [Accepted: 09/14/2022] [Indexed: 11/27/2022]
Abstract
An 8-year-old female pre-metamorphic axolotl (Ambystoma mexicanum) was examined for a suspected anterior lens luxation. Slit-lamp biomicroscopy revealed two lens-like structures in the anterior chamber of the right eye (OD), each with cataractous change. Ultrasound biomicroscopy and optical coherence tomography (OCT) were performed without sedation, and revealed small lenticular structures each with distinct nuclei and cortices. Although a distinct connection of the two lenticular structures could not be definitively ruled out, the structures appeared separate. Each of the lenticular structures was closely associated with its respective iris leaflet. This report demonstrates application of advanced imaging for diagnostic use in axolotl ophthalmology, showing that imaging of the lens can be performed without sedation, topical anesthetic, nor contact gel with high diagnostic quality. Although two distinct lenses were diagnosed with no historical evidence of trauma, the small sizes of each lenticular structure, with no detectable connection between them, are suggestive of a possible regenerative abnormality. This report opens discussion for the regenerative capabilities of the pre-metamorphic adult axolotl and possible implementations of their use in regenerative medicine research for the development of future therapies.
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Affiliation(s)
- LH Smith
- Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA
| | - SA Park
- Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA
| | - J Gjeltema
- Karen C. Drayer Wildlife Health Center and the Department of Medicine and Epidemiology of the University of California Davis School of Veterinary Medicine, Davis, CA, USA
| | - BA. Moore
- Small Animal Clinical Sciences, University of Florida, College of Veterinary Medicine, Gainesville, FL, USA
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Park NJ, Jo BG, Bong SK, Park SA, Lee S, Kim YK, Yang MH, Kim SN. Lobelia chinensis Extract and Its Active Compound, Diosmetin, Improve Atopic Dermatitis by Reinforcing Skin Barrier Function through SPINK5/LEKTI Regulation. Int J Mol Sci 2022; 23:ijms23158687. [PMID: 35955819 PMCID: PMC9369373 DOI: 10.3390/ijms23158687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/25/2022] [Accepted: 08/02/2022] [Indexed: 01/27/2023] Open
Abstract
The skin acts as a mechanical barrier that protects the body from the exterior environment, and skin barrier function is attributed to the stratum corneum (SC), which is composed of keratinocytes and skin lipids. Skin barrier homeostasis is maintained by a delicate balance between the differentiation and exfoliation of keratinocytes, and keratinocyte desquamation is regulated by members of the serine protease kalikrein (KLK) family and their endogenous inhibitor SPINK5/LEKTI (serine protease inhibitor Kazal type 5/lympho-epithelial Kazal-type-related inhibitor). Furthermore, SPINK5/LEKTI deficiency is involved in impaired skin barrier function caused by KLK over-activation. We sought to determine whether increased SPINK5/LEKTI expression ameliorates atopic dermatitis (AD) by strengthening skin barrier function using the ethanol extract of Lobelia chinensis (LCE) and its active compound, diosmetin, by treating human keratinocytes with UVB and using a DNCB-induced murine model of atopic dermatitis. LCE or diosmetin dose-dependently increased the transcriptional activation of SPINK5 promoter and prevented DNCB-induced skin barrier damage by modulating events downstream of SPINK5, that is, KLK, PAR2 (protease activated receptor 2), and TSLP (thymic stromal lymphopoietin). LCE or diosmetin normalized immune response in DNCB treated SKH-1 hairless mice as determined by reductions in serum immunoglobulin E and interleukin-4 levels and numbers of lesion-infiltrating mast cells. Our results suggest that LCE and diosmetin are good candidates for the treatment of skin barrier-disrupting diseases such as Netherton syndrome or AD, and that they do so by regulating SPINK5/LEKTI.
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Affiliation(s)
- No-June Park
- Natural Products Research Institute, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea
- Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology, Seoul 02792, Korea
| | - Beom-Geun Jo
- College of Pharmacy, Pusan National University, Busan 46241, Korea
| | - Sim-Kyu Bong
- Natural Products Research Institute, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea
| | - Sang-a Park
- Natural Products Research Institute, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea
| | - Sullim Lee
- Department of Life Science, College of Bio-Nano Technology, Gachon University, Seongnam 13120, Korea
| | - Yong Kee Kim
- College of Pharmacy, Sookmyung Women’s University, Seoul 04310, Korea
| | - Min Hye Yang
- College of Pharmacy, Pusan National University, Busan 46241, Korea
- Correspondence: (M.H.Y.); (S.-N.K.); Tel.: +82-51-513-6754 (M.H.Y.); +82-33-650-3503 (S.-N.K.)
| | - Su-Nam Kim
- Natural Products Research Institute, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea
- Division of Bio-Medical Science and Technology, KIST School, University of Science and Technology, Seoul 02792, Korea
- Correspondence: (M.H.Y.); (S.-N.K.); Tel.: +82-51-513-6754 (M.H.Y.); +82-33-650-3503 (S.-N.K.)
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Abstract
AIM To investigate the risk factors and predictors of falls according to the general characteristics, conscious state, physical condition and treatment of hospitalized patients with cancer. BACKGROUND Inpatients with cancer experience falls more frequently than those without cancer, and the degree of injuries is more severe among inpatients with cancer. A specific fall prevention strategy is needed for each patient. Prevention of falls in patients with cancer is very important for improving the quality of nursing care. METHODS This retrospective study included matched case-control patients. We evaluated patients between January 1, 2013, and December 31, 2014. A total of 356 patients (fall group, 178; non-fall group, 178) were included. For fall prediction, logistic regression was performed on the variables that were statistically significant in the univariate analysis. RESULTS The variables that were significant predictors of falls were the use of an assistive device, history of falls and fatigue. DISCUSSION The predictors of falls in patients with cancer include physical conditions and general characteristics. Fall prevention strategies in patients with cancer should be planned individually with multifaceted aspects, including physical symptom management. LIMITATIONS The study was conducted at a single cancer center in Korea; thus, our results cannot be generalized. Additionally, in Korea, it is common to have family members or private caregivers for patient care, and this might have influenced the results. CONCLUSION AND IMPLICATIONS FOR NURSING AND HEALTH POLICY The predictive factors for falls reflect the nature of the patient's environment, culture and disease. Falls have a negative effect on patient safety and can significantly influence quality of life. Policies for patient safety need more specialized and customized approaches.
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Affiliation(s)
- M D Jun
- Thyroid Cancer Center, National Cancer Center in Korea, Goyang, Korea
| | - K M Lee
- Team of Quality Management, National Cancer Center in Korea, Goyang, Korea
| | - S A Park
- Division of Nursing Science, University of Suwon, Hwaseong, Korea
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Abstract
Local anesthetics have been generally accepted as being safe. However, recent clinical trials and basic studies have provided strong evidence for the neurotoxicity of local anesthetics, especially through apoptosis. We hypothesized that local anesthetics cause neural complications through Schwann cell apoptosis. Among local anesthetics tested on the Schwann cell line, RT4-D6P2T, bupivacaine significantly induced cell death, measured by the methyl tetrazolium (MTT) assay, in a dose- (LD50 = 476 μM) and time-dependent manner. The bupivacaine-induced generation of reactive oxygen species (ROS), which was initiated within 5 hrs and preceded the activation of caspase-3 and poly ADP-ribose polymerase (PARP) degradation, was suggested to trigger apoptosis, exhibited by Hoechst 33258 nuclear staining and DNA fragmentation. Furthermore, concomitant block of ROS by anti-oxidants significantly inhibited bupivacaine-induced apoptosis. Among the local anesthetics for peripheral neural blocks, bupivacaine induced apoptosis in the Schwann cell line, which may be associated with ROS production.
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Affiliation(s)
- C J Park
- Department of Dental Anesthesiology and Dental Research Institute, Seoul National University College of Dentistry, 28 Yongon-dong Chongno-gu, Seoul 110-744, Korea
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Jegal J, Park SA, Chung K, Chung HY, Lee J, Jeong EJ, Kim KH, Yang MH. Tyrosinase inhibitory flavonoid from Juniperus communis fruits. Biosci Biotechnol Biochem 2016; 80:2311-2317. [DOI: 10.1080/09168451.2016.1217146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Abstract
The fruits of Juniperus communis have been traditionally used in the treatment of skin diseases. In our preliminary experiment, the MeOH extract of J. communis effectively suppressed mushroom tyrosinase activity. Three monoflavonoids and five biflavonoids were isolated from J. communis by bioassay-guided isolation and their inhibitory effect against tyrosinase was evaluated. According to the results of all isolates, hypolaetin 7-O-β-xylopyranoside isolated from J. communis exhibited most potent effect of decreasing mushroom tyrosinase activity with an IC50 value of 45.15 μM. Further study provided direct experimental evidence for hypolaetin 7-O-β-D-xylopyranoside-attenuated tyrosinase activity in α-MSH-stimulated B16F10 murine melanoma cell. Hypolaetin 7-O-β-D-xylopyranoside from the EtOAc fraction of J. communis was also effective at suppressing α-MSH-induced melanin synthesis. This is the first report of the enzyme tyrosinase inhibition by J. communis and its constituent. Therapeutic attempts with J. communis and its active component, hypolaetin 7-O-β-D-xylopyranoside, might be useful in treating melanin pigmentary disorders.
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Affiliation(s)
- Jonghwan Jegal
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Sang-a Park
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - KiWung Chung
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Hae Young Chung
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Jaewon Lee
- College of Pharmacy, Pusan National University, Busan, South Korea
| | - Eun Ju Jeong
- Department of Agronomy & Medicinal Plant Resources, College of Life Sciences and Natural Resources, Gyeongnam National University of Science and Technology, Jinju, South Korea
| | - Ki Hyun Kim
- Natural Product Laboratory, School of Pharmacy, Sungkyunkwan University, Suwon, South Korea
| | - Min Hye Yang
- College of Pharmacy, Pusan National University, Busan, South Korea
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Park S, Kwon B, Yang W, Han E, Yoo W, Kwon BM, Lee D. Dual pH-sensitive oxidative stress generating micellar nanoparticles as a novel anticancer therapeutic agent. J Control Release 2014; 196:19-27. [DOI: 10.1016/j.jconrel.2014.09.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Revised: 09/06/2014] [Accepted: 09/21/2014] [Indexed: 12/29/2022]
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Raffai G, Kim B, Park S, Khang G, Lee D, Vanhoutte PM. Cinnamaldehyde and cinnamaldehyde-containing micelles induce relaxation of isolated porcine coronary arteries: role of nitric oxide and calcium. Int J Nanomedicine 2014; 9:2557-66. [PMID: 24904214 PMCID: PMC4039418 DOI: 10.2147/ijn.s56578] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background and purpose Cinnamaldehyde, a major component of cinnamon, induces the generation of reactive oxygen species and exerts vasodilator and anticancer effects, but its short half-life limits its clinical use. The present experiments were designed to compare the acute relaxing properties of cinnamaldehyde with those of self-assembling polymer micelles either loaded with cinnamaldehyde or consisting of a polymeric prodrug [poly(cinnamaldehyde)] that incorporates the compound in its backbone. Methods Rings of porcine coronary arteries were contracted with the thromboxane A2 receptor agonist U46619 or 40 mM KCl, and changes in isometric tension were recorded. Results Cinnamaldehyde induced concentration-dependent but endothelium-independent, nitric oxide synthase (NOS)-independent, cyclooxygenase-independent, soluble guanylyl cyclase (sGC)-independent, calcium-activated potassium-independent, and TRPA1 channel-independent relaxations. Cinnamaldehyde also inhibited the contractions induced by 40 mM KCl Ca2+ reintroduction in 40 mM KCl Ca2+-free solution or by the Ca2+ channel opener Bay K8644. Cinnamaldehyde-loaded control micelles induced complete, partly endothelium-dependent relaxations sensitive to catalase and inhibitors of NOS or sGC, but not cyclooxygenase or TRPA1, channels. Cinnamaldehyde-loaded micelles also inhibited contractions induced by 40 mM KCl Ca2+ reintroduction or Bay K8644. Poly(cinnamaldehyde) micelles induced only partial, endothelium-dependent relaxations that were reduced by inhibitors of NOS or sGC and by catalase and the antioxidant tiron, but not by indomethacin or TRPA1 channel blockers. Conclusion The present findings demonstrate that cinnamaldehyde-loaded and poly(cinnamaldehyde) micelles possess vasodilator properties, but that the mechanism underlying the relaxation that they cause differs from that of cinnamaldehyde, and thus could be used both to relieve coronary vasospasm and for therapeutic drug delivery.
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Affiliation(s)
- Gábor Raffai
- World Class University, Department of BIN Fusion Technology, Chonbuk National University, Jeonju, Jeonbuk, South Korea
| | - Byungkuk Kim
- World Class University, Department of BIN Fusion Technology, Chonbuk National University, Jeonju, Jeonbuk, South Korea
| | - Sanga Park
- World Class University, Department of BIN Fusion Technology, Chonbuk National University, Jeonju, Jeonbuk, South Korea
| | - Gilson Khang
- World Class University, Department of BIN Fusion Technology, Chonbuk National University, Jeonju, Jeonbuk, South Korea
| | - Dongwon Lee
- World Class University, Department of BIN Fusion Technology, Chonbuk National University, Jeonju, Jeonbuk, South Korea
| | - Paul M Vanhoutte
- World Class University, Department of BIN Fusion Technology, Chonbuk National University, Jeonju, Jeonbuk, South Korea ; Department of Pharmacology and Pharmacy and State Key Laboratory for Pharmaceutical Biotechnology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, Special Administrative Region, China
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Ko E, Jeong D, Kim J, Park S, Khang G, Lee D. Antioxidant polymeric prodrug microparticles as a therapeutic system for acute liver failure. Biomaterials 2014; 35:3895-902. [DOI: 10.1016/j.biomaterials.2014.01.048] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Accepted: 01/19/2014] [Indexed: 12/24/2022]
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Kim SH, Bang SH, Park SA, Kang SY, Park KD, Oh IU, Yoo SH, Kim H, Kim CH, Baek SY. Character comparison of abdomen-derived and eyelid-derived mesenchymal stem cells. Cell Prolif 2013; 46:291-9. [PMID: 23692088 DOI: 10.1111/cpr.12027] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Accepted: 01/03/2013] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES While most human adipose tissues, such as those located in the abdomen, hip and thigh, are of mesodermal origin, adipose tissues located in the face are of ectodermal origin. The present study has compared stem cell-related features of abdomen-derived adult stem cells (A-ASCs) with those of eyelid-derived adult stem cells (E-ASCs). MATERIALS AND METHODS Adipose tissue-derived cells were maintained in DMEM supplemented with 10% FBS. Before passage 6, cells were analysed using FACS, immunocytochemistry and quantitative real time PCR (qRT-PCR). To examine multi-differentiational potential, early passage ASCs were cultivated in each of a commercial Stempro(®) Differentiation kit. RESULTS Unlike fibroblast-like morphology of A-ASCs, E-ASCs had bipolar morphology. Both types of cell exhibited similar surface antigens, and neuronal cell-related genes and proteins. However, there were differences in mRNA expression levels of CD90 and CD146; neuron-specific enolase (NSE) and nuclear receptor-related protein 1 (Nurr1) were different between the two cell types. There was no difference in multi-differentiational potential between 3 E-ASCs lines, however, E-ASCs had higher expression levels of chondrocyte-related genes compared to A-ASCs. These cells underwent senescence and maintained normal karyotypes. CONCLUSIONS Although isolated from similar adipose tissues, both types of cells displayed many contrasting characteristics. Understanding defining phenotypes of such cells is useful for making suitable choices in differing clinical indications.
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Affiliation(s)
- S-H Kim
- National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration, Cheongwon-gun, Chuncheongbuk-do 363-700, South Korea
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Lim YK, Kwak JW, Kim DW, Shin DH, Yoon MG, Ahn SH, Park SA, Lee DH, Lee SB, Park SY, Kim DY. SU-FF-J-71: A Prototype Fiducial Marker Composed of Gold Nanoparticles and Bone Cement for Proton Therapy of Prostate Cancers. Med Phys 2009. [DOI: 10.1118/1.3181363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Baeck JH, Park SA, Lee WJ, Jeong IS, Jeong K, Cho MH, Kim YK, Min BG, Ko DH. Electronic and structural characteristics of Zr-incorporated Gd2O3 films on strained SiGe substrates. J Chem Phys 2009; 130:204510. [PMID: 19485460 DOI: 10.1063/1.3140203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Zr-incorporated Gd(2)O(3) films were grown on various substrates as a function of Zr content. The extent of interfacial reactions was found to be critically dependent on both the incorporated Zr content and the substrate type. Specifically, the silicide layer was suppressed and the Gd(2)O(3) phase was changed to ZrO(2) on a Si substrate with increasing Zr content. Crystalline Gd(2)Ge(2)O(7) was grown on a Ge substrate, as the result of interfacial reactions between Gd-oxide and the Ge substrate. However, interfacial reactions were not affected by the amount of Zr incorporated. On the SiGe/Si substrate, reactions between Gd-oxide and Si could be controlled effectively by the incorporation of Zr, while the extent of reactions with Ge was significantly enhanced as the Zr content increased. The formation of an interfacial layer between the film and the SiGe substrate resulted in a textured crystalline growth.
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Affiliation(s)
- J H Baeck
- Department of Physics, Yonsei University, Seoul 120-749, Korea
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Tadross MR, Park SA, Veeramani B, Yue DT. Robust approaches to quantitative ratiometric FRET imaging of CFP/YFP fluorophores under confocal microscopy. J Microsc 2009; 233:192-204. [PMID: 19196425 DOI: 10.1111/j.1365-2818.2008.03109.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ratiometric quantification of CFP/YFP FRET enables live-cell time-series detection of molecular interactions, without the need for acceptor photobleaching or specialized equipment for determining fluorescence lifetime. Although popular in widefield applications, its implementation on a confocal microscope, which would enable sub-cellular resolution, has met with limited success. Here, we characterize sources of optical variability (unique to the confocal context) that diminish the accuracy and reproducibility of ratiometric FRET determination and devise practical remedies. Remarkably, we find that the most popular configuration, which pairs an oil objective with a small pinhole aperture, results in intractable variability that could not be adequately corrected through any calibration procedure. By quantitatively comparing several imaging configurations and calibration procedures, we find that significant improvements can be achieved by combining a water objective and increased pinhole aperture with a uniform-dye calibration procedure. The combination of these methods permitted remarkably consistent quantification of sub-cellular FRET in live cells. Notably, this methodology can be readily implemented on a standard confocal instrument, and the dye calibration procedure yields a time savings over traditional live-cell calibration methods. In all, identification of key technical challenges and practical compensating solutions promise robust sub-cellular ratiometric FRET imaging under confocal microscopy.
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Affiliation(s)
- M R Tadross
- Calcium Signals Laboratory, Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Ross Building, Room 713, 720 Rutland Avenue, Baltimore, MD 21205, USA
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Ko SH, Song KH, Park SA, Kim SR, Cha BY, Son HY, Moon KW, Yoo KD, Park YM, Cho JH, Yoon KH, Ahn YB. Cardiovascular autonomic dysfunction predicts acute ischaemic stroke in patients with Type 2 diabetes mellitus: a 7-year follow-up study. Diabet Med 2008; 25:1171-7. [PMID: 19046195 DOI: 10.1111/j.1464-5491.2008.02567.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
AIMS We investigated whether cardiovascular autonomic neuropathy (CAN) is associated with acute ischaemic stroke in patients with Type 2 diabetes. METHODS From 1999 to 2000, cardiovascular autonomic function tests were conducted in patients with Type 2 diabetes (n = 1458). Patients were followed up between 2006 and 2007. Standard tests for CAN measured heart rate variability parameters [expiration-to-inspiration (E/I) ratio, responses to the Valsalva manoeuvre and standing]. Using the American Diabetes Association criteria, the CAN scores were determined from the results of each test as follows: 0 = normal, 1 = abnormal (total maximum score 3). We assessed the development of acute ischaemic stroke events. RESULTS The prevalence of CAN at baseline was 55.7% (E/I 17.1%, Valsalva 39.4%, posture 27.3%) (n = 1126). During follow-up, 131 patients (11.6%) developed acute ischaemic stroke. The vascular events were more frequent in older patients (P < 0.001) and in those with diabetes of longer duration (P = 0.022), hypertension (P < 0.001) or diabetic retinopathy (P = 0.03) than in patients without vascular events. Patients with ischaemic stroke had higher creatinine levels (P = 0.045) and higher urine albumin excretion (P = 0.025) than those of patients without stroke. Cox proportional hazard regression analysis revealed that the CAN score was associated with the development of acute ischaemic stroke (total score 0 vs. 3, adjusted hazard ratio 2.7, 95% CI 1.3-5.5, P = 0.006). CONCLUSION Cardiovascular autonomic dysfunction was significantly associated with the development of ischaemic stroke in patients with Type 2 diabetes.
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Affiliation(s)
- S H Ko
- Division of Endocrinology and Metabolism, Department of Internal Medicine, The Catholic University of Korea, Seoul, Korea
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15
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Abstract
Thyroid related autoantibodies have been related to the development of encephalopathy, known as Hashimoto's encephalopathy. However, their relation with the encephalopathy occurring in patients with Graves' disease has not been well established. The case is reported of a 51 year old woman presenting with subacute progressive dementia with evidence of hyperthyroidism. She had Graves' disease associated with high titres of thyroid related autoantibodies. Her encephalopathy was not improved by antithyroid drugs, but promptly responded to corticosteroid treatment, and stabilised with a gradual reduction of thyroid related autoantibody titres. Brain positron emission tomography initially showed a diffuse and multifocal cerebral hypometabolism with subsequent normalisation on her clinical recovery, which was consistent with the acute and reversible cerebral inflammation probably mediated by autoimmune mechanisms.
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Affiliation(s)
- S W Seo
- Department of Neurology, Yonsei University College of Medicine, Shinchon-dong 134, Seodaemoon-gu, Seoul 120-752, Korea
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16
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Park SA, Lim SR, Kim GS, Heo K, Park SC, Chang JW, Chung SS, Choi JU, Kim TS, Lee BI. Ictal electrocorticographic findings related with surgical outcomes in nonlesional neocortical epilepsy. Epilepsy Res 2002; 48:199-206. [PMID: 11904238 DOI: 10.1016/s0920-1211(02)00006-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
PURPOSE To characterize ictal electrocorticographic features related to surgical outcomes in nonlesional neocortical epilepsy (NE). METHODS We analyzed 187 ictal electrocorticograms (ECoG) obtained from 18 patients who had undergone presurgical evaluation and subsequent neocortical resections (frontal: seven, parietal: one, occipital: four, multilobar: six). None of them had any MRI-detectable lesions. Various ECoG data sets recorded from eight patients who achieved a favorable surgical outcome (either seizure free or more than 90% reduction of seizure frequencies) were compared with that from ten patients with unfavorable outcome (less than 90% reduction of seizure frequencies) (follow up duration: 47+/-11 months). RESULTS Reproducible ictal onset zone (IOZ) in recurrent seizures (P=0.013) and persistent ictal discharges in IOZ from the onset to the end of seizure (P=0.004) were found more frequently in the patients with good outcome. Ictal onset patterns consisting of low voltage fast or high amplitude beta spikes predicted a good surgical outcome while rhythmic sinusoidal activity or rhythmic spike/sharp waves of slow frequency were predictive of poor outcome (P=0.01). The ictal onset rhythm consisting of gamma or beta frequencies was more prevalent in the favorable group (P=0.015). CONCLUSIONS The presence of stable ictal circuit suggested by the consistent earliest activation of specific electrodes in the repetitive seizures (reproducible IOZ) and the active participation of IOZ throughout the attack were valuable prognostic factors in addition to the morphology and frequency of ictal onset rhythm.
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Affiliation(s)
- S A Park
- Department of Neurology, Yonsei University College of Medicine, Severance Hospital, CPO Box 8044, Seoul, South Korea
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17
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Park SA, Park HJ, Lee BI, Ahn YH, Kim SU, Choi KS. Bcl-2 blocks cisplatin-induced apoptosis by suppression of ERK-mediated p53 accumulation in B104 cells. Brain Res Mol Brain Res 2001; 93:18-26. [PMID: 11532334 DOI: 10.1016/s0169-328x(01)00176-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Bcl-2 has been reported to inhibit neurotoxicity induced by cisplatin. However, neither the mechanism of cisplatin-induced neurotoxicity nor the mechanism by which Bcl-2 confers neuroprotection is clear. In this study, the signaling pathways involved in cisplatin-induced neurotoxicity were examined using a rat neuroblastoma cell line, B104. Treatment of B104 cells with cisplatin induced apoptosis, accompanying the accumulation of p53 and Bax protein. Interestingly, extracellular signal-regulated kinase 1/2 (ERK1/2) activities of MAP kinases were markedly enhanced prior to cisplatin-induced accumulation of p53 and Bax. Inhibition of ERK1/2 activities using PD98059, a selective MEK inhibitor, blocked the apoptotic cell death preventing cisplatin-induced accumulation of p53 and Bax. These results suggest that ERK mediates cisplatin-induced p53 activation to trigger apoptosis in B104 cells. Overexpression of Bcl-2 in B104 cells resulted in the complete resistance to cisplatin-induced apoptosis blocking ERK activation and the subsequent signaling pathway of p53. Our study clearly demonstrates that the action site of Bcl-2 localizes upstream of ERK in cisplatin-induced apoptotic signaling pathway.
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Affiliation(s)
- S A Park
- Department of Neurology, Yonsei University College of Medicine, Seoul, South Korea
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18
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Abstract
PURPOSE To describe the possible mechanism of ictal automatisms with preserved responsiveness (APRs) in a patient with left mesial temporal lobe epilepsy, which had not been reported previously. METHODS Ictal EEGs recorded from bilateral foramen ovale electrodes with scalp-sphenoidal electrodes were analyzed in respect to the ictal semiology. RESULTS The patient had a right hemispheric language dominance in the dextral. Electroclinical analysis revealed that the onset of oroalimentary automatisms coincided with the involvement of the left mesial and lateral temporal structures by spreading ictal discharges. The ictal discharge spreading was limited to the ipsilateral hemisphere throughout the seizure, which explained the intact consciousness and preserved responsiveness of the patient. CONCLUSIONS This case suggests that APRs take place in seizures originating from the nondominant temporal lobe, during which ipsilateral mesial and lateral temporal structures are diffusely involved without spreading to the contralateral side.
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Affiliation(s)
- S A Park
- Departments of Neurology, Yonsei University College of Medicine, Seoul, Korea
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19
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Shin ZI, Yu R, Park SA, Chung DK, Ahn CW, Nam HS, Kim KS, Lee HJ. His-His-Leu, an angiotensin I converting enzyme inhibitory peptide derived from Korean soybean paste, exerts antihypertensive activity in vivo. J Agric Food Chem 2001; 49:3004-9. [PMID: 11410001 DOI: 10.1021/jf001135r] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
It has been reported that soybean peptide fractions isolated from Korean fermented soybean paste exert angiotensin I converting enzyme (ACE) inhibitory activity in vitro. In this study, further purification and identification of the most active fraction inhibiting ACE activity were performed, and its antihypertensive activity in vivo was confirmed. Subsequently, a novel ACE inhibitory peptide was isolated by preparative HPLC. The amino acid sequence of the isolated peptide was identified as His-His-Leu (HHL) by Edman degradation. The IC(50) value of the HHL for ACE activity was 2.2 microg/mL in vitro. Moreover, the synthetic tripeptide HHL (spHHL) resulted in a significant decrease of ACE activity in the aorta and led to lowered systolic blood pressure (SBP) in spontaneously hypertensive (SH) rats compared to control. Triple injections of spHHL, 5 mg/kg of body weight/injection resulted in a significant decrease of SBP by 61 mmHg (p < 0.01) after the third injection. These results demonstrated that the ACE inhibitory peptide HHL derived from Korean fermented soybean paste exerted antihypertensive activity in vivo.
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Affiliation(s)
- Z I Shin
- Research and Development Center, Nongshim Company, Ltd., Gunpo 435-030, South Korea
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20
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Affiliation(s)
- S T Lim
- Department of Nuclear Medicine, Chonbuk National University Medical School, Chonju, Korea
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Lim ST, Sohn MH, Park SA. Curious radioactivity in the lower abdomen on bone scintigraphy: displacement of the urinary bladder by an incidentally diagnosed uterine myoma. Clin Nucl Med 2000; 25:824-5. [PMID: 11043728 DOI: 10.1097/00003072-200010000-00018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- S T Lim
- Department of Nuclear Medicine and Institute for Medical Sciences, Chonbuk National University Hospital, Chonju, Korea
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22
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Park SA, Choi KS, Bang JH, Huh K, Kim SU. Cisplatin-induced apoptotic cell death in mouse hybrid neurons is blocked by antioxidants through suppression of cisplatin-mediated accumulation of p53 but not of Fas/Fas ligand. J Neurochem 2000; 75:946-53. [PMID: 10936175 DOI: 10.1046/j.1471-4159.2000.0750946.x] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Peripheral neuropathy following cisplatin treatment is a major limiting factor in cisplatin chemotherapy of cancer patients. We investigated the pathomechanism underlying cisplatin neuropathy using a mouse dorsal root ganglion neuron-neuroblastoma hybrid cell line (N18D3) developed in our laboratory. DNA fragmentation, a characteristic feature of apoptosis, was induced in hybrid neurons following treatment with cisplatin. Accumulation of p53, Fas, and Fas ligand (Fas-L) was also demonstrated in these neurons. Preincubation with N-acetylcysteine (NAC), a precursor of glutathione, blocked cisplatin-induced apoptosis completely, whereas Trolox, a vitamin E analogue, blocked it partially. Cisplatin-induced p53 accumulation was suppressed by NAC treatment, whereas p53 accumulation was retarded by Trolox treatment. In contrast, neither NAC nor Trolox showed any inhibitory effect on cisplatin-induced Fas/Fas-L accumulation. These results suggest that the neuroprotective effects of antioxidants against cisplatin-induced neurotoxicity in hybrid neurons are mediated mainly through the inhibition of p53 accumulation but not of Fas/Fas-L accumulation by these antioxidants.
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Affiliation(s)
- S A Park
- Department of Neurology, Ajou University School of Medicine, Suwon, Korea
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23
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Affiliation(s)
- S T Lim
- Department of Nuclear Medicine, Chonbuk National University Hospital, Chonju, Korea
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24
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Abstract
The authors report a patient who suddenly developed memory loss without any other focal neurologic deficits. Neuropsychological testing showed severe anterograde verbal and visual memory deficits that improved gradually over several months, but not to the point of the premorbid state. Brain MRI with diffusion-weighted imaging performed 3 days after onset revealed acute infarction involving the bilateral fornices and the right genu of the corpus callosum. The authors suggest that acute fornix infarction may cause anterograde memory deficits.
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Affiliation(s)
- S A Park
- Department of Neurology, Ajou University School of Medicine, Suwon, Korea
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25
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Abstract
This study aims to understand seizure control outcomes and the risk of developing new wake seizures (WS) related to the different types of pure sleep epilepsies (SE), which is important in making rational management plans. A retrospective review of the Yonsei Epilepsy Clinic Registry identified 63 patients with pure SE not belonging to any specific epileptic syndromes. They were divided into the group of generalized tonic-clonic seizures during sleep (S-GTCS : n = 21) and the group of partial epilepsies during sleep (S-PE: n = 42) on the basis of seizure phenomenology, EEG, and neuroimaging data. These patients were followed for 2 years and their clinical variables were analysed for seizure control outcomes and development of new WS. Of 21 patients with S-GTCS, 17 achieved a seizure-free outcome and only one patient developed a new WS, which was consistent with a partial-onset secondary GTCS in phenomenology. Of 42 patients with S-PE only 15 patients achieved a seizure-free outcome and 11 patients developed WS during the 2-year follow-up period. Higher baseline seizure frequency and longer duration of epilepsy were associated with a higher incidence of new WS. The results suggest that the patients with S-GTCS carry a favorable clinical course, thus driving privileges or freedom of daily activities can be conferred without delay once their seizures are well controlled. However, the seizure control outcome was poor and the development of WS was frequent in patients with recurrent S-PE.
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Affiliation(s)
- S A Park
- Department of Neurology, Yonsei University, College of Medicine, Seoul, Korea
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26
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Abstract
Locked-in syndrome due to midbrain infarct is very rare. This report describes a patient with locked-in syndrome whose magnetic resonance images showed bilateral infarcts in the cerebral peduncle. Cerebral angiography disclosed bilateral irregular thrombotic narrowing of the vertebral and proximal basilar arteries with rostral basilar artery occlusion, a previously unreported findings.
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Affiliation(s)
- S A Park
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
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27
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Abstract
We studied the clinical characteristics, location of epileptogenic regions, and the surgical outcomes in 18 patients with intractable epilepsy associated with previous CNS infections. All patients underwent an extensive presurgical evaluation and 11 patients had intracranial EEG monitoring. On the basis of presurgical evaluation, epileptic regions were localized to the mesial temporal (n = 12) and the neocortical (n = 6) regions. The age of the time of CNS infection was significantly younger and the latent period of non-febrile seizures after CNS infection was longer in patients with mesial temporal lobe epilepsy (MTLE). MRI showed hippocampal atrophy and hippocampal signal changes in 11 of 12 patients with MTLE. Among 6 patients with neocortical epilepsy (NE) 5 patients had normal MRI and one showed cerebral hemi-atrophy. Surgery was successful (class I & II) in all patients with MTLE, however, in the patients with neocortical epilepsy, seizure-free results were not achieved in any patients after resective surgery (6 patients) and only 2 patients achieved Class II outcomes after a second epilepsy surgery consisting of neocortical resection. Patients with MTLE after CNS infection were differentiated from the group of neocortical epilepsy by an earlier onset of CNS infection, a prolonged latent period and a higher frequency of meningitis. The characteristic pathology in this group was hippocampal sclerosis and the surgical result was excellent. Neocortical epilepsy following CNS infection usually had no focal lesion on MRI and was associated with a relatively poor surgical result. This study suggested that the surgical outcome was influenced by the type of epileptic syndromes rather than the etiology of seizures. The association of MTLE with the younger age of CNS infections and with meningitis more frequently suggested that the neocortical neurons during infancy or early childhood may be more resistant to the epileptogenesis, or that the CNS infections in patients with MTLE might be milder in severity to cause selective injuries to the hippocampal neurons during their vulnerable stage.
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Affiliation(s)
- J H Lee
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
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28
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Park SA. [Nursing and law. The role of the nurse and the law]. Taehan Kanho 1993; 32:13-8. [PMID: 8501862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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29
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Rhee HY, Cho MY, Cho KJ, Kim YH, Kim KB, Kim KJ, Moon HJ, Park SA, Kang HS. [The effects of clinical application of a nursing diagnosis protocol]. Kanho Hakhoe Chi 1989; 19:40-62. [PMID: 2739234 DOI: 10.4040/jnas.1989.19.1.40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This study was conducted to measure the effects of clinical application of a Nursing Diagnosis Protocol. The dependent variables were the degree of patient's satisfaction and the degree of nurse's satisfaction with the nursing activity. Analysis of the effect of the use of the nursing diagnosis protocol was based on the nursing record. The subjects for this study were 61 nurses (experimental group 31, control group 30) and 155 patients (experimental group 55, control group 100) on four internal medicine wards in K University Hospital in Seoul.
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30
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Park SA, Kang HS, Moon HJ, Kim KJ, Rhee HY, Cho MY, Cho KJ, Kim YH, Kim KB. [The use of nursing diagnosis in practice]. Kanho Hakhoe Chi 1989; 19:24-39. [PMID: 2739233 DOI: 10.4040/jnas.1989.19.1.24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This study was conducted to investigate the present situation and problems related to the use of nursing diagnosis in practice. The data were obtained from 332 subjects (27 director of nursing service, 302 staff nurses) who worked in university hospitals in Korea from July through August 1988 using a mailed questionnaire. Data were analyzed by frequency, X2 test and t-test. The findings were as follows: 1. Clinical use of nursing diagnosis by directors of nursing service and staff nurses. 1) The majority of the nursing departments (88.9%) conducted group education on nursing diagnosis during the last 5 years and 81.5% of them kept a record format for nursing diagnosis; 88.9% of them had had prior experience with the nursing diagnosis. 2) Most of nurses (97.0%) had received education on nursing diagnosis. 2. Factors related to the clinical use of nursing diagnosis in nursing service departments and by staff nurses. 1) The one factor related to the use of nursing diagnosis in the nursing service department was the existence of a record. 2) Factors related to the use of nursing diagnosis by the staff nurses were the organization style of the nursing service department, group education during the last 5 years, existence of a record, the attitude of the director of nursing service, and prior experience of the use of the nursing diagnosis as characteristics of nursing service department and educational experience of nursing diagnosis as a character of nurse. 3. Problems with the use of nursing diagnosis. 1) The primary problem was the lack of time and personnel (mean:3.757); the second problem was the lack of knowledge and will to use nursing diagnosis in practice by the staff nurses (mean:3.546). 2) There was no significant difference in problems expressed by the director of nursing services and the nurses. The majority of nurses who worked in the university hospitals expressed interest in and concern about the use of nursing diagnosis. Most of the nurses had had education about on nursing diagnosis but use in practice was limited. The primary problem was lack of time and manpower.(ABSTRACT TRUNCATED AT 400 WORDS)
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31
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Park SA. [Continuing education. The plan of nursing management practice (1)]. Taehan Kanho 1988; 27:37-41. [PMID: 3204976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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32
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Park SA, Kim SY. [Community nursing diagnosis and planning. 3. Community nursing diagnosis and planning of a geopolitical community]. Taehan Kanho 1987; 26:43-55. [PMID: 3695325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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33
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Park SA. [Seminar on nursing administration. Quality assurance in nursing: process aspect]. Taehan Kanho 1987; 26:37-40. [PMID: 3657050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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34
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Park SA. [Role expansion of community nurse. III. School nurse practitioner]. Taehan Kanho 1985; 24:93-6. [PMID: 3851991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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35
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36
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Park SA, Moon HJ, Kang HS. [Study on model for promotion of school health]. Taehan Kanho 1985; 24:54-66. [PMID: 3845252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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37
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Park SA. [Organization of nursing activities]. Taehan Kanho 1984; 23:17-24, 75. [PMID: 6561321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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38
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Park SA, Giannattasio C, Tancer ML. Foreign body reaction to the intraperitoneal use of Avitene. Obstet Gynecol 1981; 58:664-7. [PMID: 7029371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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39
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40
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Park SA. [Continuing education - community health nursing: basic concept of nursing administration. Direction]. Taehan Kanho 1978; 17:42-5. [PMID: 249826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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41
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Park SA. [Study on school health evaluation]. Taehan Kanho 1977; 16:47-51. [PMID: 244669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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42
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Park SA. [School nurse practitioner program]. Taehan Kanho 1976; 15:81-3. [PMID: 1069876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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43
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Park SA. [A study on knowledge, attitude and practice relative to registered tuberculosis cases in a part of a health center in Seoul]. Taehan Kanho 1976; 15:43-57. [PMID: 1063897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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44
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45
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Schumacher HR, Szekely IE, Park SA, Rao UN, Fisher DR, Patel SB. Acute leukemic cells. Qualitative and quantitative electron microscopy. Am J Pathol 1973; 73:27-46. [PMID: 4518324 PMCID: PMC1904049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Quantitative and qualitative electron microscopic studies were performed on the leukemic cells of 3 patients with stem cell leukemia, 6 patients with acute lymphoblastic leukemia, 7 patients with acute monoblastic leukemia, 3 patients with acute myeloblastic leukemia and 7 patients with acute monomyeloblastic leukemia. Significant quantitative differences were noted between some of the leukemic cells in heterochromatin:euchromatin ratios, cell size, granules per cell, amount of endoplasmic reticulum and the number of polyribosomes. Qualitative abnormalities which were found in some cells of all the leukemic groups were observed. These abnormalities included nuclear pockets, deep nuclear indentations (usually not the stem cell), nucleosomes, dilated perinuclear spaces, centrioles located in nuclear pockets (not in the stem cell or lymphoblast), accumulation of microfibrils (greatest in the monoblast and myeloblast), disrupted mitochondria with virus-like particles (none in stem cells), smaller granules and mitochondrial DNA, glycogen, and myelin whorls. The presence of the smaller granules in disrupted mitochondria and the resulting clear areas is probably related to the deranged carbohydrate metabolism of these cells. The presence of virus-like particles within mitochondria may be extremely important, but requires much more investigation. Some of the above findings may offer clues to further investigation of the acute leukemic cell.
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48
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49
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MESH Headings
- Adolescent
- Adult
- Aged
- Bone Marrow
- Bone Marrow Cells
- Cell Nucleus
- Child
- Child, Preschool
- Computers
- Cytoplasm
- Female
- Glycogen/analysis
- Humans
- Infant
- Leukemia, Monocytic, Acute/blood
- Leukemia, Monocytic, Acute/pathology
- Leukemia, Myeloid, Acute/blood
- Leukemia, Myeloid, Acute/pathology
- Leukocytes/analysis
- Male
- Microscopy, Electron
- Middle Aged
- Mitochondria
- Organoids
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