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Panda A, Cho HK, Kim H. A Green Synthesis of CoFe 2O 4 Decorated ZIF-8 Composite for Electrochemical Oxygen Evolution. Int J Mol Sci 2023; 24:ijms24119585. [PMID: 37298534 DOI: 10.3390/ijms24119585] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 05/30/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023] Open
Abstract
Low-cost, sustainable hydrogen production requires noble metal-free electrocatalysts for water splitting. In this study, we prepared zeolitic imidazolate frameworks (ZIF) decorated with CoFe2O4 spinel nanoparticles as active catalysts for oxygen evolution reaction (OER). The CoFe2O4 nanoparticles were synthesized by converting agricultural bio-waste (potato peel extract) into economically valuable electrode materials. The biogenic CoFe2O4 composite showed an overpotential of 370 mV at a current density of 10 mA cm-2 and a low Tafel slope of 283 mV dec-1, whereas the ZIF@CoFe2O4 composite prepared using an in situ hydrothermal method showed an overpotential of 105 mV at 10 mA cm-2 and a low Tafel slope of 43 mV dec-1 in a 1 M KOH medium. The results demonstrated an exciting prospect of high-performance noble metal-free electrocatalysts for low-cost, high-efficiency, and sustainable hydrogen production.
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Affiliation(s)
- Atanu Panda
- Department of Mechanical Engineering, Gachon University, Seongnam-si 13120, Gyeonggi-do, Republic of Korea
| | - Hang-Kyu Cho
- Department of Mechanical Engineering, Gachon University, Seongnam-si 13120, Gyeonggi-do, Republic of Korea
| | - Hansang Kim
- Department of Mechanical Engineering, Gachon University, Seongnam-si 13120, Gyeonggi-do, Republic of Korea
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Choi BH, Cho HK, Jung JH, Choi JY, Shin S, Kim YH, Han DJ. How to reduce lethal infectious complications in ABO-incompatible kidney transplantation. Transplant Proc 2015; 47:653-9. [PMID: 25891705 DOI: 10.1016/j.transproceed.2014.11.049] [Citation(s) in RCA: 9] [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: 10/15/2014] [Accepted: 11/12/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND ABO-incompatible organ transplants are good options for expanding the living donor pool; however, the necessary pre-conditioning to remove ABO antibodies before surgery can evoke critical infectious complications after surgery. METHODS Between February 2009 and July 2013, we performed ABO-incompatible kidney transplantation on 182 patients. We analyzed the first 85 patients for post-operative infectious complications in a cross-sectional cohort of patients (group 1, n = 85) who had received an ABO-incompatible kidney transplant and, in light of the results, amended the pre-conditioning (lower dose of rituximab, selective use of calcineurin inhibitors, anti-metabolite reduction, and prophylactic strategy) given to a prospective cohort (group 2, n = 97). RESULTS The characteristics of the two groups did not differ significantly. Infectious complications decreased significantly in group 2, including cytomegalovirus (anti-genemia 64.7% vs 27.8%, P < .001) and BK viremia (35.2% vs 18.6%, P = .008). The acute rejection rate and death-censored graft survival were similar in both groups. Notably, with the modified protocol, there were no deaths (8.2% vs 0.0%, P = .03). CONCLUSIONS Pre-conditioning for ABO-incompatible kidney transplantation is a prerequisite for successful outcome; its drawbacks can be limited with the use of a modified immunosuppressive strategy. If immunosuppression is modified according to host conditions, ABO-incompatible kidney transplantation can be performed safely with a successful graft outcome.
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Affiliation(s)
- B-H Choi
- Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - H K Cho
- Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - J H Jung
- Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - J Y Choi
- Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - S Shin
- Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Y H Kim
- Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - D J Han
- Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
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Lee HS, Jeong JH, Hong G, Cho HK, Baek BK, Koo CM, Hong SM, Kim J, Lee YW. Effect of Solvents on De-Cross-Linking of Cross-Linked Polyethylene under Subcritical and Supercritical Conditions. Ind Eng Chem Res 2013. [DOI: 10.1021/ie4006194] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hong-shik Lee
- Clean Energy
Research Center, Korea Institute of Science and Technology, Hwarang-ro
14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Ju Hyeong Jeong
- School of Chemical and Biological
Engineering and Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744,
Republic of Korea
| | - Giyoung Hong
- School of Chemical and Biological
Engineering and Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744,
Republic of Korea
| | - Hang-Kyu Cho
- Department
of Chemical and Biomolecular
Engineering, Sogang University, 35 Baekbeom-ro,
Mapo-gu, Seoul 121-742, Republic of Korea
| | - Bum Ki Baek
- Nanohybrids Research Center, Korea Institute of Science and Technology, Hwarang-ro
14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Chong Min Koo
- Nanohybrids Research Center, Korea Institute of Science and Technology, Hwarang-ro
14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Soon Man Hong
- Nanohybrids Research Center, Korea Institute of Science and Technology, Hwarang-ro
14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Jaehoon Kim
- School of Mechanical Engineering, Sungkyunkwan University, 2066 Seobu-Ro, Jangan-Gu,
Suwon, Gyeong Gi-Do 440-746, Republic of Korea
- Sungkyun Advanced Institute of Nano Technology (SAINT), 2066 Seobu-Ro,
Jangan-Gu, Suwon, Gyeong Gi-Do 440-746, Republic of Korea
| | - Youn-Woo Lee
- School of Chemical and Biological
Engineering and Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744,
Republic of Korea
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Cho HK, Jang SH, Lee E, Kim SY, Kim S, Kwon YH, Son SM. Diffusion tensor imaging-demonstrated differences between hemiplegic and diplegic cerebral palsy with symmetric periventricular leukomalacia. AJNR Am J Neuroradiol 2012; 34:650-4. [PMID: 22976239 DOI: 10.3174/ajnr.a3272] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Patients with cerebral palsy have variable clinical presentations such as hemiplegic, diplegic, or quadriplegic patterns though they have PVL on conventional MR images. The authors investigated whether DTT can differentiate between hemiplegic and diplegic CP in patients presenting with symmetric PVL on conventional MR images. MATERIALS AND METHODS One hundred thirteen consecutive pediatric patients with definite hemiplegic (59 patients; 30 boys, 29 girls; mean age, 34.19 months; range, 24-52 months) or diplegic (54 patients; 27 boys, 27 girls; mean age, 31.07 months; range, 24-48 months) symptoms and bilateral symmetric PVL on conventional brain MR imaging were recruited. The states of CSTs were examined by using DTT, and the asymmetries of right and left CSTs in the hemiplegic and diplegic groups were compared by using asymmetric anisotropy indexes and asymmetric mean diffusivity indexes. RESULTS All patients in the hemiplegic group with asymmetric results exhibited disrupted integrities of more affected CSTs and sparing of less affected CSTs. However, diplegic patients revealed symmetric disrupted findings of the right and left CSTs at the upper periventricular level. Asymmetric anisotropy index and asymmetric mean diffusivity index values were significantly higher in the hemiplegic group than in the diplegic group (P < .05), and these results of DTT significantly corresponded with their typical clinical manifestation. CONCLUSIONS DTT may be very useful for the detailed estimation of the CST state in patients with bilateral symmetric PVL.
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Affiliation(s)
- H K Cho
- Department of Physical Medicine and Rehabilitation, College of Science and Technology, College of Medicine, Yeungnam University, Taegu, Republic of Korea
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Lee HS, Jeong JH, Hong SM, Koo CM, Cho HK, Lee YW. Recycling of Crosslinked Polypropylene and Crosslinked Polyethylene in Supercritical Methanol. Korean Chemical Engineering Research 2012. [DOI: 10.9713/kcer.2012.50.1.088] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Cho HK, Hong SM, Koo CM. Crystallization and the mechanical and rheological properties of decrosslinked-crosslinked-high-density polyethylenes using a supercritical fluid. J Appl Polym Sci 2010. [DOI: 10.1002/app.33386] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
Dendritic cell (DC) immunotherapy is a strong candidate for the treatment of incurable cancers especially malignant melanoma. Nevertheless, the proper guideline of DC immunotherapy does not exist. The absence of the guideline is also an obstacle to clinical trials of DC immunotherapy. So we conducted this study in order to develop an effective DC preparation method for immunotherapy in mouse malignant melanoma. Mouse bone marrow-derived DC were stimulated with tumour antigen alone or tumour antigen plus a cocktail (anti-CD40 antibody +TNF-alpha+ IL-1beta) for 8, 24 or 48 h and the characteristics of these DC, such as surface molecules (CD40, CD80, CD86, MHC class II, CCR7), cytokines(IL-12, IFN-gamma, and IL-10), DC-induced T cell proliferation in vitro, and the production of IFN-gamma by those cells, were evaluated. Mice with melanoma were then treated with DC stimulated with tumour antigen alone and tumour antigen plus cocktail for 8 or 48 h. The tumour size and survival rate of these mice were then evaluated. (1) Beneficial clinical effects such as a reduction of tumour size and an increased survival rate were best observed in the group treated with DC stimulated for 8 h with tumour antigen plus cocktail. (2) The single prominent characteristic of DC stimulated for 8 h with tumour antigen plus cocktail was an elevated IL-12 secretion. The cytokine IL-12 was not secreted by other DC. Consequently, proper production of IL-12 was found to be an important requirement for DC used in immunotherapy of mouse melanoma.
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Affiliation(s)
- T-H Lee
- Department of Dermatology, Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea
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Kong HJ, Hong GE, Cho HK, Nam BH, Kim YO, Kim WJ, Lee SJ, Kim KK. Cloning of profilin (FcPFN) from the shrimp Fenneropenaeus chinensis, a highly expressed protein in white spot syndrome virus (WSSV)-infected shrimp. J Appl Genet 2009; 50:245-50. [PMID: 19638679 DOI: 10.1007/bf03195678] [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: 11/28/2022]
Abstract
We isolated and characterized the profilin (FcPFN) cDNA from hemocytes of Fenneropenaeus chinensis, a unique shrimp species from the Yellow Sea. The FcPFN cDNA consists of 830 bp and encodes a polypeptide of 125 amino acids, having a predicted isoelectric point of 5.06. The deduced amino acid sequence of FcPFN shows 36% and 90% amino acid sequence identity to the profilin genes of Pacific white shrimp Litopenaeus vannamei and black tiger shrimp Penaeus monodon, respectively. The FcPFN mRNA was highly expressed in hemocytes and hepatopancreas and moderately in muscle of normal shrimp. The higher expression of FcPFN mRNA is observed in shrimp infected with the white spot syndrome virus (WSSV), which is a major concern in all shrimp-growing regions of the world. These results suggest a potential role for FcPFN in viral host defense mechanisms.
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Affiliation(s)
- H J Kong
- Biotechnology Research Institute, National Fisheries Research and Development Institute, Sirang-ri, Gijang-up, Gijang-gun, Busan, Republic of Korea.
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Lee HS, Jeong JH, Cho HK, Koo CM, Hong SM, Kim H, Lee YW. A kinetic study of the decross-linking of cross-linked polyethylene in supercritical methanol. Polym Degrad Stab 2008. [DOI: 10.1016/j.polymdegradstab.2008.09.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ford MA, Turner L, DiBrezzo R, Cho HK. Bone densitometry in assessment of bone mineral density. J Ark Med Soc 2001; 98:86-8. [PMID: 11517681] [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] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
Osteoporosis is a serious disease characterized by low bone mineral density. Osteoporosis affects 24 million people annually and may be responsible for devastating hip, wrist and spinal fractures. Bone mineral density is considered the best predictor for osteoporotic fracture. Progress has been made toward noninvasive assessment of bone mineral density to provide early diagnosis of osteoporosis. A variety of methods are used to assess bone mineral density. These methods are presented and dual energy X-ray absorptiometry is discussed in detail.
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Affiliation(s)
- M A Ford
- Department of Health, Kinesiology, Recreation and Dance, University of Arkansas, Fayetteville, USA
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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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Affiliation(s)
- S K Lee
- Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea
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Bergan RC, Reed E, Myers CE, Headlee D, Brawley O, Cho HK, Figg WD, Tompkins A, Linehan WM, Kohler D, Steinberg SM, Blagosklonny MV. A Phase II study of high-dose tamoxifen in patients with hormone-refractory prostate cancer. Clin Cancer Res 1999; 5:2366-73. [PMID: 10499606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Micromolar concentrations of tamoxifen inhibit the activity of protein kinase C and were recently shown to inhibit prostate cancer cell growth in preclinical studies. Because micromolar concentrations can be attained with high-dose therapy, the clinical activity of high-dose tamoxifen was evaluated in patients with metastatic adenocarcinoma of the prostate. Between December 1993 and February 1997, 30 patients with hormone-refractory metastatic adenocarcinoma of the prostate were continuously administered tamoxifen at 160 mg/m2/day. Therapy was continued until disease progression. All study patients had failed prior treatment with combined androgen blockade, had castrate levels of testosterone, and were heavily pretreated, having received a median of three prior regimens. The average steady-state plasma concentration of tamoxifen was 2.96+/-1.32 microM (mean +/- SD). Grade 3 neurotoxicity was observed in 29% of patients and was rapidly reversible and readily managed with dose modification. Otherwise, grade 3 toxicities were rare. One partial response (80% decline in prostate-specific antigen) was observed (3.3%), whereas disease stabilization was observed in six patients (20%), for a combined partial response/stable disease response rate of 23%. Median time to progression was 2.1 months, and median survival time was 10.5 months. High-dose tamoxifen therapy was well tolerated and associated with micromolar concentrations of tamoxifen in human plasma, and it demonstrated activity, albeit limited, in a heavily pretreated patient cohort with hormone-refractory prostate cancer. These findings suggest that further investigation of the role of protein kinase C modulation in prostate cancer is warranted.
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Affiliation(s)
- R C Bergan
- Medicine Branch, National Cancer Institute, Bethesda, Maryland 20892, USA
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Cho HK, Lush RM, Bartlett DL, Alexander HR, Wu PC, Libutti SK, Lee KB, Venzon DJ, Bauer KS, Reed E, Figg WD. Pharmacokinetics of cisplatin administered by continuous hyperthermic peritoneal perfusion (CHPP) to patients with peritoneal carcinomatosis. J Clin Pharmacol 1999; 39:394-401. [PMID: 10197298 DOI: 10.1177/00912709922007967] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The pharmacokinetics of cisplatin administered by continuous hyperthermic peritoneal perfusion (CHPP) was characterized in patients with peritoneal carcinomatosis. Cisplatin was added into the perfusate with escalating doses from 100 mg/m2 to 400 mg/m2. The hyperthermic perfusion was maintained for 90 minutes with a flow rate of 1.5 L/min and a target peritoneal temperature of 42.5 degrees C after a tumor debulking procedure. Samples of both the perfusate and blood were obtained during the perfusion and 30 minutes after the perfusion. Cisplatin plasma and perfusate concentrations were determined by flameless atomic absorption spectrometry with a lower limit of detection of 2 ng/ml and a coefficient of variation (CV) < 10%. Fifty-six patients were enrolled in the study. The mean (+/- SD) percentage of cisplatin present in the perfusate at the completion of perfusion was 27.8% +/- 20% of the total dose. The maximum cisplatin concentrations in the perfusate were 10 times higher than those in plasma. The area under the concentration-time curve (AUC) of the perfusate was 13 times higher than the AUC of plasma. A two-compartment model with an additional peritoneal cavity compartment fits to the data best based on the Akaike information criterion. However, the interpatient variability was considerably high (CV < 100%). In conclusion, cisplatin administered by hyperthermic peritoneal perfusion resulted in a pharmacological advantage by obtaining higher and direct drug exposure to the tumor in the peritoneal cavity while limiting systemic absorption and toxicity. Using a complex two-compartment model, the authors were able to characterize the pharmacokinetics of cisplatin given intraperitoneally via this technique.
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Affiliation(s)
- H K Cho
- Medicine Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
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Lee SH, Cho HK, Son H, Lee YS. Substrate transport and cocaine binding of human dopamine transporter is reduced by substitution of carboxyl tail with that of bovine dopamine transporter. Neuroreport 1997; 8:2591-4. [PMID: 9261833 DOI: 10.1097/00001756-199707280-00034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A chimeric dopamine transporter (DAT) cDNA encoding mutant human DAT (hDAT) protein in which the intracellular carboxyl-terminal tail is replaced by that of the bovine dopamine transporter (bDAT) was constructed. The chimeric hDAT cDNA was expressed in COS-7 cells, and [3H]dopamine and [3H]MPP+ uptake and [3H]CFT binding capacities were assessed. Substrate transport and ligand binding of bDAT were reduced by 32-43% as a result of substitution of the carboxyl tail in hDAT, suggesting that the functional characteristics of bDAT arise from differences in the carboxyl tail between human and bovine DAT. Thus, it appears that the sequences encoded within the carboxyl terminal of DAT would be one of the important determinants for its functions.
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Affiliation(s)
- S H Lee
- Department of Biochemistry, College of Medicine, Hanyang University, Seoul, Korea
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Lee SH, Oh DY, Jung SC, Kim YM, Cho HK, Koh JK, Lee YS. Neuroleptic drugs alter the dopamine transporter-mediated uptake and release of dopamine: a possible mechanism for drug-induced tardive dyskinesia. Pharmacol Res 1997; 35:447-50. [PMID: 9308073 DOI: 10.1006/phrs.1997.0159] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A bovine dopamine transporter (bDAT) cDNA was transfected into CV-1 cells, a cell line that lacks vesicular storage and release mechanisms. Using this cell line, the effects of neuroleptic drugs on DAT-mediated uptake and release of dopamine (DA) were examined. All of the neuroleptic drugs tested, inhibited DA uptakes in DAT expressing cells, and most of them were shown to promote spontaneous release of DA at the same time. These results imply that neuroleptic drugs would cause an overflow of DA in the synaptic cleft of extrapyramidal dopaminergic neurons, which could be one of the possible mechanisms of drug-induced tardive dyskinesia.
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Affiliation(s)
- S H Lee
- Department of Biochemistry, College of Medicine, Hanyang University, Seoul, Korea
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Heo K, Kim SJ, Kim JH, Kim OK, Cho HK. False lateralization of seizure perceived by a patient with infarction of the right parietal lobe who showed the neglect syndrome. Epilepsia 1997; 38:122-3. [PMID: 9024194 DOI: 10.1111/j.1528-1157.1997.tb01087.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
A 66-year-old right-handed man developed seizures characterized by an electric sensation and convulsive movements involving the left arm, which sometimes secondarily generalized. The patient, however, reported that the seizures occurred in his right arm. Neurological examination showed many features of left hemineglect, including allesthesia, secondary to acute infarction of the right parietal lobe. Although allesthetic response was not documented during the seizure, it is likely that sensory symptoms of the seizures were localized inappropriately or that he had false memory for lateralization of seizures. In this case, the neglect syndrome caused by infarction of the right parietal lobe extended to symptoms of the seizure itself.
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Affiliation(s)
- K Heo
- Department of Neurology, Pusan-Paik Hospital, Inje University College of Medicine, Pusan, Korea
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Cho HK, Park YW, Kim YJ, Shyn KH. Histopathologic and ultrastructural findings of photocoagulation lesions produced by transpupillary diode laser in the rabbit retina. J Korean Med Sci 1993; 8:420-30. [PMID: 8179830 PMCID: PMC3053881 DOI: 10.3346/jkms.1993.8.6.420] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Transpupillary retinal photocoagulations were performed on ten eyes of five pigmented rabbits using a diode laser (Nidek Co., LTD, Aichi, Japan) emitting infrared radiation at 800 nm wavelength. A histological and an ultrastructural study on the treated eyes were done at 1, 3, 5, and 7 days after retinal photocoagulations. The purpose of this study was to observe the sequential changes in the retina and the choroid following transpupillary diode laser retinal photocoagulations at the parameters of laser power which produced a grayish white retinal discoloration with distinct white center. It seemed that the lesion was grade 3 retinal photocoagulation by Tso et al's classification. It appeared that the parameters necessary to produce grade 3 photocoagulation lesions were 160 mW power, and 0.2 second duration at 200 microns size. In general, with an agreement to other reports, histologic study of the diode laser lesions showed that the outer retina was damaged more severely than the inner retina. However, on day 1 after laser treatment, the alterations were more profound in the inner retina than in the outer retina and an occasional swelling of the axons in the nerve fiber layer was observed on the ultrastructural study. The results observed have not been found in other previous studies and suggest that the inner retina might be injured directly by 800 nm wavelength diode laser radiations. Thus we could conclude that 800 nm wavelength diode radiation might be absorbed by melanin pigment and also by other chromophores contained in inner retinal tissues. Further studies must follow to verify the laser-tissue interactions in diode laser retinal photocoagulations.
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Affiliation(s)
- H K Cho
- Department of Ophthalmology and Pathology, College of Medicine, Chung Ang University, Seoul, Korea
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Abstract
The author has experienced a case of microphthalmos with large orbital cyst in a 4 months old female, that was found at the time of birth. To facilitate fitting a cosmetic prosthesis, the microphthalmos with cyst was removed surgically. On serial section I could find an area of discontinuation of the sclera that was suspected to be the defective closure of the embryonic cleft. Some aberrant retinal tissue was found in the wall of the cyst, and markedly disorganized ocular tissue forming a tumor-like mass filled the microphthalmic eyeball. In view of these histopathologic findings I could draw the conclusion that developmental failure of the embryonic eyeball and consequential proliferation of the embryonic neuroepithelial cells occurred at an early developmental stage causing the formation of microphthalmos with cyst.
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Affiliation(s)
- H K Cho
- Department of Ophthalmology, Chung-Ang University Medical School, Seoul, Korea
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Baziuk N, Gremillion CM, Peyman GA, Cho HK. Collagen shields and intraocular drug delivery: concentration of gentamicin in the aqueous and vitreous of a rabbit eye after lensectomy and vitrectomy. Int Ophthalmol 1992; 16:101-7. [PMID: 1587692 DOI: 10.1007/bf00918940] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Five albino New Zealand rabbits underwent bilateral lensectomy and vitrectomy. All left eyes were fitted with a collagen shield that had been soaked for 5 min in 2.0 mL of gentamicin solution (40 mg/mL for IV use). Right eyes were treated with fortified gentamicin drops (13.6 mg/mL) every 30 min for 12 hrs. Aqueous and vitreous specimens were obtained at the following time intervals: 1, 2, 4, 8, 12 and 24 hrs. We found the gentamicin concentrations to be higher in the aqueous of all eyes treated with fortified gentamicin drops. Only those eyes treated with fortified gentamicin drops attained a therapeutic drug level (4 micrograms-9 micrograms/mL) in the aqueous. Therapeutic drug levels were not attained in the vitreous of either treatment group.
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Affiliation(s)
- N Baziuk
- LSU Eye Center, Louisiana State University Medical Center School of Medicine, New Orleans
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21
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Abstract
Extralobar pulmonary sequestration, known as accessory lung, is a rare congenital anomaly and intrapericardial lung sequestration is extremely rare. To the best of our knowledge, only four reported cases were intrapericardial. We report a case with intrapericardial extralobar pulmonary sequestration confirmed by operation and morphologic basis.
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Affiliation(s)
- C M Ahn
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
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22
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Abstract
Effects of chronic ingestion of 2 levels of alcohol on selenium (Se) utilization were determined in initially Se-depleted rats. Male weanling rats were fed ad lib a Se deficient (0.012 mg/kg) basal diet for 4 weeks and then were meal-fed low or marginally adequate Se in the form of high Se yeast for 4 weeks. During Se repletion, ethanol, which replaced medium-chain triglycerides in the diet, provided 10 or 20 percent of food energy. The basal diet provided 80% of food energy as well as adequate protein, vitamins and minerals. In rats given adequate Se moderate chronic ethanol consumption did not influence Se absorption or retention, but increasing ethanol level raised Se in liver and whole blood in a linear fashion and in kidney in a quadratic manner. In this rat model measures of Se status were reduced by low Se intake, not chronic moderate ethanol ingestion.
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Affiliation(s)
- H K Cho
- Department of Human Nutrition and Food Management, Ohio State University, Columbus 43210
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23
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Cho HK, Kozu H, Peyman GA, Parry GJ, Khoobehi B. The effect of aminoguanidine on the blood-retinal barrier in streptozocin-induced diabetic rats. Ophthalmic Surg 1991; 22:44-7. [PMID: 1826545] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The effect of aminoguanidine hydrochloride (AG) on the blood-retinal barrier was studied in rats with streptozocin-induced diabetes. Half of the rats were given AG (100 mg/kg/day) while the remainder received no treatment. Vitreous fluorophotometry was performed on all rats before STZ injection and 2 weeks after induction of diabetes mellitus. Two weeks after STZ injection the mean 60-minute vitreous fluorescein concentration following dye injection had increased more in the nontreated group than in the AG-treated group, suggesting that AG may have some beneficial effect on the breakdown of the blood-retinal barrier.
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Affiliation(s)
- H K Cho
- LSU Eye Center, Louisiana State University Medical Center School of Medicine, New Orleans 70112
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24
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Sunwoo IN, Cho HK, Oh SJ. Height, an important factor in the latency of somatosensory evoked potentials. Electromyogr Clin Neurophysiol 1990; 30:169-74. [PMID: 2351093] [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] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In a study of the relationship between height and the somatosensory evoked potentials (SEPs) in 24 normal individuals, we found significant linear correlations between height and the latencies of major peaks along the pathway in the median, ulnar, and first, third, and fifth digital SEPs. Thus, we conclude that the measured latency should be compared with the expected latency according to the subject's height before it is interpreted as normal or abnormal.
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Affiliation(s)
- I N Sunwoo
- Department of Neurology, Yonsei University College of Medicine, Seoul, Korea
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25
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Abstract
Uneqivocally positive edrophonium tests, both clinically and electrophysiologically, were observed in a classic case of the Lambert-Eaton myasthenic syndrome. A review of the literature revealed that a positive edrophonium response has been reported in a majority of cases of myasthenia gravis (MG) and overlap myasthenic syndrome and in some cases of the Lambert-Eaton myasthenic syndrome, botulism, congenital myasthenic syndrome, drug-induced myasthenic syndrome, the Guillain-Barre syndrome, and amyotrophic lateral sclerosis. From this, we conclude that an unequivocally positive edrophonium test alone is not necessarily diagnostic of MG and that the diagnosis of MG should be based on the clinical features together with edrophonium-responsiveness and other laboratory findings.
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Affiliation(s)
- S J Oh
- Department of Neurology, University of Alabama, Birmingham, Veterans Administration Medical Center
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26
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Chang CW, Cho HK, Oh SJ. Posterior antebrachial cutaneous neuropathy: case report. Electromyogr Clin Neurophysiol 1989; 29:109-11. [PMID: 2539964] [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: 01/01/2023]
Abstract
We are reporting the first case of posterior antebrachial cutaneous (PABC) neuropathy which was confirmed by the sensory nerve conduction test. PABC neuropathy and radial nerve palsy developed after an intramuscular injection in this case. Sensory nerve conduction study of the PABC nerve showed slow nerve conduction velocity but normal amplitude of compound nerve action potential (CNAP). Follow-up testing revealed an increase in the CNAP amplitude and normalization of nerve conduction velocity in the PABC nerve. Our study demonstrates that PABC neuropathy can be confirmed by the sensory nerve conduction test.
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27
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Oh SJ, Hurwitz EL, Lee KW, Change CW, Cho HK. The single-fiber EMG in the Lambert-Eaton myasthenic syndrome. Muscle Nerve 1989; 12:159-60. [PMID: 2710151] [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: 01/02/2023]
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28
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Tang LC, Cho HK, Chan SY, Wong VC. Dextropreponderance of corpus luteum rupture. A clinical study. J Reprod Med 1985; 30:764-8. [PMID: 4067947] [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: 01/08/2023]
Abstract
A retrospective study of 55 consecutive patients with cystic corpora lutea, corpus luteum cysts or hematomas was undertaken to verify the observation of a right-side predominance in the incidence of rupture. Thirty-nine patients had a ruptured corpus luteum diagnosed surgically and confirmed histologically. No difference was observed in the overall distribution, the volume of hemorrhage or the size of the cysts between the two sides. A statistically significantly higher incidence of rupture was found on the right side (81.25%) as compared to the left (56.52%). We propose a working hypothesis of a difference in the ovarian venous architecture that causes a higher intraluminal pressure in the right corpus luteum and the dextropreponderance of ruptures.
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30
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Abstract
Three patients with atypical presentation of female genital tract tuberculosis are reported. Tuberculous hydrosalpinx with abdominal peritonitis, concomitant ectopic gestation with active salpingitis and tuberculous endometritis presenting as postmenopausal vaginal discharge are uncommon clinical manifestations. The age distribution, the importance of careful histological examination and the available methods for follow-up are discussed in the appropriate cases.
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31
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Cho HK. [Odontogenic carcinoma]. Taehan Chikkwa Uisa Hyophoe Chi 1984; 22:281-284. [PMID: 6589327] [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: 05/21/2023]
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32
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Choi IS, Cho HK, Kim KW. Hereditary spastic paraplegia. Yonsei Med J 1983; 24:83-6. [PMID: 6659558 DOI: 10.3349/ymj.1983.24.1.83] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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33
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Cho HK, Lee YH, Couch RA, Jagadeesh JM, Olson CL. Development of a multichannel electrochemical centrifugal analyzer. Clin Chem 1982; 28:1956-61. [PMID: 7127810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A new instrument has been developed that is similar in design and concept to the GeMSAEC centrifugal analyzer (Oak Ridge National Laboratory) except that electrochemical detection is used rather than optical detection. The present version has eight channels, each with its own detector. Problems of speed control and sampling synchronization are greatly minimized from those of a multichannel centrifugal analyzer having a single detector system. All eight sample compartments and polarographic cells are contained in a single Teflon rotor, 7.7 cm in diameter. The working electrodes are planar carbon electrodes. The initial application of the analyzer is in kinetic methods involving the rates of enzyme-catalyzed reactions. The initial system chosen was the glucose oxidase system. When the rotor is spun, the solution moves into the sample cell and up against the planar working electrode. The reaction starts and current is measured as a function of time at a constant applied voltage. The current output from each polarographic circuit is connected to a separate channel of a multiplexed analog-to-digital converter. The analyzer is controlled by a dedicated microcomputer system, which sets the polarographic cell voltages, collects the current-time data, and calculates the results.
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34
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Abstract
Abstract
A new instrument has been developed that is similar in design and concept to the GeMSAEC centrifugal analyzer (Oak Ridge National Laboratory) except that electrochemical detection is used rather than optical detection. The present version has eight channels, each with its own detector. Problems of speed control and sampling synchronization are greatly minimized from those of a multichannel centrifugal analyzer having a single detector system. All eight sample compartments and polarographic cells are contained in a single Teflon rotor, 7.7 cm in diameter. The working electrodes are planar carbon electrodes. The initial application of the analyzer is in kinetic methods involving the rates of enzyme-catalyzed reactions. The initial system chosen was the glucose oxidase system. When the rotor is spun, the solution moves into the sample cell and up against the planar working electrode. The reaction starts and current is measured as a function of time at a constant applied voltage. The current output from each polarographic circuit is connected to a separate channel of a multiplexed analog-to-digital converter. The analyzer is controlled by a dedicated microcomputer system, which sets the polarographic cell voltages, collects the current-time data, and calculates the results.
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35
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Cho HK, Kim HP, Yuh IH, Yoo TY, Lim CY. [Branchial cyst of the neck. Report of a case (author's transl)]. Taehan Chikkwa Uisa Hyophoe Chi 1973; 11:649-54. [PMID: 4523379] [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: 01/11/2023]
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36
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Ko CM, Lee EW, Kim HK, Cho HK. [The identification of Candida species isolated from oral cavity (author's transl]. Taehan Chikkwa Uisa Hyophoe Chi 1973; 11:671-4. [PMID: 4523383] [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: 01/11/2023]
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37
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Cho HK, Kim HS, Park HS, Kim HP. [The clinicopathological appraisal of the odontogenic cyst as a potential carcinoma (author's transl)]. Taehan Chikkwa Uisa Hyophoe Chi 1973; 11:603-7. [PMID: 4523375] [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: 01/11/2023]
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38
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Yoo TY, Yuh IH, Kim HS, Cho HK. [A case report of hemangioendothelioma occurred on the palate and buccal mucosa (author's transl)]. Taehan Chikkwa Uisa Hyophoe Chi 1973; 11:379-81. [PMID: 4535463] [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: 01/11/2023]
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39
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Cho HK, Park HS, Kim HS, Ryu SY. [Myxoma (fibromyxoma) of the jaw--report of six cases and histopathological finding (author's transl)]. Taehan Chikkwa Uisa Hyophoe Chi 1973; 11:341-5. [PMID: 4535460] [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: 01/11/2023]
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40
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Shin MS, Cho HK, Jun DJ, Kim HP. [A case report of oral lichen planus]. Taehan Chikkwa Uisa Hyophoe Chi 1972; 10:103-8. [PMID: 4505035] [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: 01/11/2023]
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41
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Yuh IH, Kim DS, Cho HK. [Histochemical studies on the giant cells appearing in oral lesions]. Taehan Chikkwa Uisa Hyophoe Chi 1972; 10:29-34. [PMID: 4505517] [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: 01/11/2023]
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42
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Kim ZS, Kim DS, Cho HK. [Histopathological and histochemical studies on the gingiva in periodontitis]. Taehan Chikkwa Uisa Hyophoe Chi 1972; 10:59-64. [PMID: 4261627] [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: 01/09/2023]
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43
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Cho HK, Chang HR, Park YS, Kim HK. [Histopathological studies of gingival changes in agranulocytosis]. Taehan Chikkwa Uisa Hyophoe Chi 1971; 9:701-4. [PMID: 5292410] [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: 01/14/2023]
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44
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Cho HK. [Histopathological studies on oral precancerous lesions]. Taehan Chikkwa Uisa Hyophoe Chi 1971; 9:311-7. [PMID: 5292304] [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: 01/14/2023]
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45
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Shin MS, Kim DS, Cho HK. Histopathological and histochemical studies on the dental granulomas. Taehan Chikkwa Uisa Hyophoe Chi 1970; 8:665-72. [PMID: 5284873] [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: 01/14/2023]
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46
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Kim HP, Kim DS, Cho HK. Pathological studies on the benign tumors of osteogenic origin in the jaws. Taehan Chikkwa Uisa Hyophoe Chi 1970; 8:673-80. [PMID: 5284874] [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: 01/14/2023]
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