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Sohng C, Han MH, Park D, Park KD, Jang YH, Lee WJ, Lee SJ, Kim JY. Clinical features of subungual melanoma according to the extent of Hutchinson's nail sign: a retrospective single-centre study. J Eur Acad Dermatol Venereol 2020; 35:380-386. [PMID: 32562580 DOI: 10.1111/jdv.16762] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 05/27/2020] [Indexed: 11/26/2022]
Abstract
BACKGROUND Hutchinson's nail sign (HS) is among the diagnostic criteria for subungual melanoma (SUM). However, there is minimal evidence supporting the overall clinical significance of HS in SUM. OBJECTIVES To identify clinicopathological features of SUM according to the extent of HS. METHODS Retrospective cohort study was performed with consecutive SUM patients at a single centre from January 2006 to December 2017. The extent of HS was defined by the number of affected nail folds (range 0-4). Comparison groups were organized as follows: patients with HS (affecting ≥1 nail folds) vs. without HS; patients with HS affecting ≥2 nail folds vs. HS affecting <2 nail folds; patients with HS affecting ≥3 nail folds vs. HS affecting <3 nail folds. Clinicopathological characteristics of SUM were compared between the groups. RESULTS Sixty-one SUM patients were included. Forty-six (75.4%) exhibited HS; 22 (47.8%) on a toe and 24 (52.2%) on a finger. In multivariate analysis, nail destruction [hazard ratio (HR), 10.00; 95% confidence interval (CI), 2.61-38.30; P = 0.001] was significantly associated with the presence of HS and amputation was significantly associated with HS affecting ≥2 nail folds (HR, 4.75; 95% CI, 1.36-16.61; P = 0.015). High T stage (HR, 1.85; 95% CI, 1.20-2.85; P = 0.005, Fig. 2) was significantly associated with HS appearing in ≥3 nail folds. CONCLUSION Besides its value of detecting SUM, HS provides useful clinical information. The number of nail folds exhibiting HS could be a useful clinical clue for planning therapeutic strategies for SUM.
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Affiliation(s)
- C Sohng
- Department of Dermatology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
| | - M H Han
- Department of Pathology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
| | - D Park
- Department of Physical Medicine and Rehabilitation, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, South Korea
| | - K D Park
- Department of Dermatology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
| | - Y H Jang
- Department of Dermatology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
| | - W J Lee
- Department of Dermatology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
| | - S J Lee
- Department of Dermatology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
| | - J Y Kim
- Department of Dermatology, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, South Korea
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Park SE, Lee BW, Kim JH, Lee WJ, Cho JH, Jung CH, Lee SH, Suh S, Hur GC, Kim SH, Jang YH, Park CY. Effect of gemigliptin on glycaemic variability in patients with type 2 diabetes (STABLE study). Diabetes Obes Metab 2017; 19:892-896. [PMID: 28058753 DOI: 10.1111/dom.12869] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 12/23/2016] [Accepted: 12/31/2016] [Indexed: 01/21/2023]
Abstract
The aim of this study was to evaluate the effect of gemigliptin vs sitagliptin or glimepiride as initial combination therapy with metformin on glycaemic variability and to assess the correlation between glycaemic variability reduction and the dipeptidyl peptidase-4 (DPP-4) inhibition in patients with type 2 diabetes. This multicentre, randomized, active-controlled, open-label exploratory study included 69 patients with HbA1c > 7.5%. Subjects were randomized to receive gemigliptin 50 mg (n = 24), sitagliptin 100 mg (n = 23) or glimepiride 2 mg (n = 22) for 12 weeks. After 12 weeks, the change in mean amplitude of glycaemic excursion (MAGE) compared with baseline was significantly lower in the DPP-4 inhibitor groups compared with that in patients who received glimepiride. Furthermore, the standard deviation (SD) of glucose was significantly lower in patients who received gemigliptin than that in patients who received sitagliptin or glimepiride. The DPP-4 inhibition was significantly correlated with changes in MAGE and SD of glucose. In conclusion, gemigliptin and sitagliptin were more effective than glimepiride in reducing glycaemic variability as initial combination therapy with metformin in patients with type 2 diabetes, and the DPP-4 inhibition was associated with a reduction in glycaemic variability.
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Affiliation(s)
- Se E Park
- Department of Endocrinology and Metabolism, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Byung W Lee
- Department of Internal Medicine, Severance Hospital, University of Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Jae H Kim
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Woo J Lee
- Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jae H Cho
- Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea School of Medicine, Seoul, Republic of Korea
| | - Chang H Jung
- Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Seung H Lee
- Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea School of Medicine, Seoul, Republic of Korea
| | - Sunghwan Suh
- Department of Internal Medicine, Dong-A University Medical Center, Busan, Republic of Korea
| | | | - Sung H Kim
- LG Life Sciences, Seoul, Republic of Korea
| | | | - Cheol Y Park
- Department of Endocrinology and Metabolism, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Yoon SA, Han BG, Kim SG, Han SY, Jo YI, Jeong KH, Oh KH, Park HC, Park SH, Kang SW, Na KR, Kang SW, Kim NH, Jang YH, Shin SH, Cha DR. Efficacy, safety and albuminuria-reducing effect of gemigliptin in Korean type 2 diabetes patients with moderate to severe renal impairment: A 12-week, double-blind randomized study (the GUARD Study). Diabetes Obes Metab 2017; 19:590-598. [PMID: 28019072 DOI: 10.1111/dom.12863] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 12/20/2016] [Accepted: 12/21/2016] [Indexed: 01/12/2023]
Abstract
AIMS This multicentre, randomized, double-blind study investigated the efficacy and safety of gemigliptin in Korean type 2 diabetes mellitus (T2DM) patients with moderate to severe renal impairment (RI). METHODS The study comprised a 12-week main part and a 40-week extension. We report here the results from the main part. In total, 132 patients were randomized to receive gemigliptin (n = 66) or placebo (n = 66). Changes in glycated haemoglobin (HbA1c; primary endpoint), other glycaemic control parameters (fasting plasma glucose, glycated albumin and fructosamine), lipid profiles, renal function parameters and safety profiles were evaluated. RESULTS Baseline characteristics were comparable between the groups (mean HbA1c, 8.4% [68 mmol/mol]; age, 62.0 years; duration of type 2 diabetes, 16.3 years; estimated glomerular filtration rate, 33.3 mL/min/1.73 m2 ). At Week 12, the adjusted mean change ± standard error in HbA1c with gemigliptin was -0.82% ± 0.14% (-8.9 ± 1.5 mmol/mol), whereas it was 0.38% ± 0.14% (4.2 ± 1.5 mmol/mol) with placebo (significant between-group difference, P < .001). Other glycaemic control parameters showed beneficial changes as well. Body weight change (gemigliptin, -0.3 kg; placebo, -0.2 kg) was not significant. In the gemigliptin group, the mean decrease in urinary albumin creatinine ratio (UACR) was significant, both in patients with microalbuminuria (-41.9 mg/g creatinine, P = .03) and macroalbuminuria (-528.9 mg/g creatinine, P < .001). Drug-related adverse events were similar with gemigliptin and placebo (15% and 12%, respectively). CONCLUSIONS A 12-week treatment with gemigliptin improved glycaemic control and provided UACR reduction in T2DM patients with moderate to severe RI. Gemigliptin was well tolerated, with no additional risk of hypoglycaemia and change in body weight.
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Affiliation(s)
- Sun A Yoon
- Department of Internal Medicine, Catholic University Uijeongbu St. Mary's Hospital, Uijeongbu, Republic of Korea
| | - Byoung G Han
- Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Sung G Kim
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea
| | - Sang Y Han
- Department of Internal Medicine, Inje University, Ilsan Paik Hospital, Goyang, Republic of Korea
| | - Young I Jo
- Department of Internal Medicine, Konkuk University School of Medicine, Seoul, Republic of Korea
| | - Kyung H Jeong
- Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Republic of Korea
| | - Kook H Oh
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hyeong C Park
- Department of Internal Medicine, Gangnam Severance Hospital, Seoul, Republic of Korea
| | - Sun H Park
- Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Republic of Korea
| | | | - Ki R Na
- Department of Internal Medicine, Chungnam National University College of Medicine, Daejeon, Republic of Korea
| | - Sun W Kang
- Department of Internal Medicine, Busan Paik Hospital, Busan, Republic of Korea
| | - Nam H Kim
- Department of Internal Medicine, Chonnam National University College of Medicine, Gwangju, Republic of Korea
| | | | | | - Dae R Cha
- Korea University Ansan-Hospital, Ansan, Republic of Korea
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Moon SY, Lee WJ, Lee SJ, Kim DW, Jang YH. Urticarial dermatitis unresponsive to conventional treatment: a hidden sign of pancreatic cancer. Clin Exp Dermatol 2016; 41:322-4. [PMID: 26332077 DOI: 10.1111/ced.12755] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/03/2015] [Indexed: 11/30/2022]
Affiliation(s)
- S Y Moon
- Department of Dermatology, Kyungpook National University School of Medicine, 200, Dong duk-ro, Jung-gu, Daegu, 700-721, Republic of Korea
| | - W J Lee
- Department of Dermatology, Kyungpook National University School of Medicine, 200, Dong duk-ro, Jung-gu, Daegu, 700-721, Republic of Korea
| | - S-J Lee
- Department of Dermatology, Kyungpook National University School of Medicine, 200, Dong duk-ro, Jung-gu, Daegu, 700-721, Republic of Korea
| | - D W Kim
- Department of Dermatology, Kyungpook National University School of Medicine, 200, Dong duk-ro, Jung-gu, Daegu, 700-721, Republic of Korea
| | - Y H Jang
- Department of Dermatology, Kyungpook National University School of Medicine, 200, Dong duk-ro, Jung-gu, Daegu, 700-721, Republic of Korea.
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Kim JM, Pham LD, Jang YH, Kim NR, Ryoo SY, Jang YR, Jang JM, Jung SC. Isolation and characterization of Mycobacterium avium subspecies paratuberculosis in Korean black goat (Capra hircus aegagrus). ACTA ACUST UNITED AC 2015. [DOI: 10.4067/s0301-732x2015000300017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Jang YH, Sim JH, Kang HY, Kim YC, Lee ES. Immunohistochemical expression of matrix metalloproteinases in the granulomatous rosacea compared with the non-granulomatous rosacea. J Eur Acad Dermatol Venereol 2011; 25:544-8. [PMID: 20698913 DOI: 10.1111/j.1468-3083.2010.03825.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND There is a granulomatous variant which is recognized in the rosacea spectrum. However, the pathogenesis of granuloma formation in rosacea has not been clearly demonstrated. Matrix metalloproteinases (MMPs) are required for recruitment of inflammatory cells and for tissue remodelling, making way for the development of well-organized granuloma. OBJECTIVE The aim of this study was to investigate the expression of transforming growth factor (TGF)-β, TGF-β type II receptor (TβRII), Tumour necrosis factor (TNF)-α, MMP-1, 2 and 9 in the granulomatous rosacea (GR) compared with the non-granulomatous rosacea (NGR) and test the hypothesis that the changes of these profiles in GR would be related with chronic ultraviolet radiation (UVR)-exposure. METHODS Facial skin samples were obtained from 20 patients with GR and NGR (control group). The sections were stained using haematoxylin and eosin, Verhoeff's elastic stain, and antibodies to TGF-β, TβRII, TNF-α, MMP-1, -2 and -9. RESULTS The amount of elastotic material was significantly increased in the dermis of GR lesions. Expression of TGF-β was significantly decreased in the epidermis of GR lesions compared with NGR lesions. In addition, the expression of MMP-9 was significantly increased in the dermis of GR lesions compared with NGR lesions, especially at the centre of the granuloma on a semi-quantitative analysis. MMP-2 expression was also increased in GR lesions, although the difference between the two groups was not statistically significant. CONCLUSIONS The results of this study suggest that the increased expression of MMPs in the dermis may participate in granuloma formation of GR in association with UVR.
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Affiliation(s)
- Y H Jang
- Department of Dermatology, Ajou University School of Medicine, Suwon, Korea
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Jang YH, Lee JY, Kang HY, Lee ES, Kim YC. Oestrogen and progesterone receptor expression in melasma: an immunohistochemical analysis. J Eur Acad Dermatol Venereol 2010; 24:1312-6. [DOI: 10.1111/j.1468-3083.2010.03638.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Salmonellosis is an important zoonotic disease that affects both people and animals. The incidence of reptile-associated salmonellosis has increased in Western countries due to the increasing popularity of reptiles as pets. In Korea, where reptiles are not popular as pets, many zoos offer programs in which people have contact with animals, including reptiles. So, we determined the rate of Salmonella spp. infection in animals by taking anal swabs from 294 animals at Seoul Grand Park. Salmonella spp. were isolated from 14 of 46 reptiles (30.4%), 1 of 15 birds (6.7%) and 2 of 233 mammals (0.9%). These findings indicate that vigilance is required for determining the presence of zoonotic pathogen infections in zoo animals and contamination of animal facilities to prevent human infection with zoonotic diseases from zoo facilities and animal exhibitions. In addition, prevention of human infection requires proper education about personal hygiene.
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Affiliation(s)
- Y H Jang
- College of Veterinary Medicine, Konkuk University, Seoul 143-701, Korea
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Kim JS, Sung IH, Kim YT, Kim DE, Jang YH. Analytical model development for the prediction of the frictional resistance of a capsule endoscope inside an intestine. Proc Inst Mech Eng H 2008; 221:837-45. [PMID: 18161244 DOI: 10.1243/09544119jeim173] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
For the purpose of optimizing the design of the locomotion mechanism as well as the body shape of a self-propelled capsule endoscope, an analytical model for the prediction of frictional resistance of the capsule moving inside the small intestine was first developed. The model was developed by considering the contact geometry and viscoelasticity of the intestine, based on the experimental investigations on the material properties of the intestine and the friction of the capsule inside the small intestine. In order to verify the model and to investigate the distributions of various stress components applied to the capsule, finite element (FE) analyses were carried out. The comparison of the frictional resistance between the predicted and the experimental values suggested that the proposed model could predict the frictional force of the capsule with reasonable accuracy. Also, the FE analysis results of various stress components revealed the stress relaxation of the intestine and explained that such stress relaxation characteristics of the intestine resulted in lower frictional force as the speed of the capsule decreased. These results suggested that the frontal shape of the capsule was critical to the design of the capsule with desired frictional performance. It was shown that the proposed model can provide quantitative estimation of the frictional resistance of the capsule under various moving conditions inside the intestine. The model is expected to be useful in the design optimization of the capsule locomotion inside the intestine.
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Affiliation(s)
- J S Kim
- Department of Mechanical Engineering, Yonsei University, 134 Shinchong-dong, Seodaemoon-gu, Seoul, 120-749, Republic of Korea
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Choi JW, Lee W, Lee DB, Park CH, Kim JS, Jang YH, Kim Y. Electrochemical detection of pathogen infection using cell chip. Environ Monit Assess 2007; 129:37-42. [PMID: 17171282 DOI: 10.1007/s10661-006-9423-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2005] [Revised: 01/27/2006] [Accepted: 03/09/2006] [Indexed: 05/13/2023]
Abstract
The immobilized cell using self-assembled synthetic oligopeptide was applied to the electrochemical detection of pathogen infection. Thin films based on cysteine-terminated synthetic oligopeptides were fabricated for the immobilization of HeLa cell on gold (Au) substrate. Layer formation and immobilization of the cell were investigated with surface plasmon resonance (SPR) and electrochemical impedance spectroscopy (EIS). Experimental results showed that the thin film of cysteine-terminated synthetic oligopeptide was successfully fabricated and it could be applied for the immobilization of HeLa cells. The adhered living cell was exposed to E. coli O157:H7, which induced the change of SPR angle and electrochemical impedance signal. The proposed cell immobilization method using self-assembly technique can be applied to construct the cell microarray for on-site pathogen monitoring.
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Affiliation(s)
- J W Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, 1 Sinsu-Dong, Mapo-Gu, Seoul, 121-742, South Korea
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Jang YH, Lee YC, Park NH, Shin HY, Mun KC, Choi MS, Lee MY, Kim AR, Kim JM, Lee SR, Park HR. Polyphenol (-)-epigallocatechin gallate protection from ischemia/reperfusion-induced renal injury in normotensive and hypertensive rats. Transplant Proc 2006; 38:2190-4. [PMID: 16980039 DOI: 10.1016/j.transproceed.2006.06.101] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
INTRODUCTION The effect of epigallocatechin gallate (EGCG) in an in vivo renal model of ischemia with reperfusion (I/R) was compared between normotensive (WKR) and hypertensive (SHR) rats. METHODS WKR (groups I, II, III) and SHR groups (groups IV, V, VI) were divided into three types. Groups I and IV were sham-operated animals; groups II and V were subjected to 45 minutes of renal I/R; and groups III and VI received 10 mg/kg EGCG intravenously at the time of reperfusion. Three days after renal I/R, we compared renal function markers, malondialdehyde (MDA), and histologic changes. RESULTS Following renal I/R, levels of blood urea nitrogen (BUN) and serum creatinine (sCr) were increased and serum creatinine clearance (CrCl) decreased in group V compared to group II (P < .001). Those receiving EGCG treatment (groups III and VI) had decreased BUN and sCr compared to non-EGCG I/R groups (P < .001), but not surprisingly, higher than sham groups. CrCl was lowest in the SHR groups. The MDA was significantly decreased after EGCG treatment (P = .028 in group III, P = .002 in group VI). Following renal I/R, tissue necrosis was more severe among SHR (P < .001). However, the ratio of regeneration to damage significantly increased in SHR after EGCG treatment. CONCLUSIONS The reperfusion injury was greater among SHR compared with WKR in terms of renal function, lipid peroxidation, and tissue damage. EGCG treatment significantly ameliorated renal impairment and promoted tissue regeneration following renal I/R.
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Affiliation(s)
- Y H Jang
- Institute for Medical Science, Keimyung University, Dongsan Medical Center, 194 Dongsan-dong, Jung-gu, Daegu, South Korea 700-712.
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Kim YT, Byun JS, Kim J, Jang YH, Lee WJ, Ryu JK, Kim SW, Yoon YB, Kim CY. Factors predicting concurrent cholangiocarcinomas associated with hepatolithiasis. Hepatogastroenterology 2003; 50:8-12. [PMID: 12629979] [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: 03/01/2023]
Abstract
BACKGROUND/AIMS Hepatolithiasis is a risk factor for cholangiocarcinoma. However, it is difficult to detect early cholangiocarcinoma that occurs as a complication of hepatolithiasis. To identify the factors, which can be used for predicting cholangiocarcinomas in patients with hepatolithiasis, we compared the clinical characteristics of patients who had cholangiocarcinoma associated with hepatolithiasis with those of patients with hepatolithiasis only. METHODOLOGY Forty patients with cholangiocarcinoma associated with hepatolithiasis (group HC) and 73 patients with hepatolithiasis only (group H) were randomly selected for this study. Mean tumor size was 6.1 +/- 2.4 cm in diameter. RESULTS Patients of group HC were older (56.7 +/- 8.9 yr) than those of group H (49.2 +/- 12.9 yr) (p < 0.001). Weight loss was more frequent in group HC (51.5%) than in group H (5.5%) (p < 0.001) and serum alkaline phosphatase levels were higher in group HC (181 +/- 184 IU/L) than in group H (426 +/- 385 IU/L) (p < 0.001). The proportion of the patients who had hepatolithiasis in the right or both lobes of the liver was higher in group HC (72.5%) than in group H (50.6%) (p = 0.024). The optimal cutoff value of serum CEA level for cholangiocarcinoma detection was set at 4.2 ng/mL using ROC cure to give a sensitivity of 67.6% and a specificity of 90.5%. Group HC differed from group H because of its lower rates of both abdominal pain and cholangitis, longer duration of stone history, and lower serum albumin level. Factors that did not predict cholangiocarcinoma included sex ratio, white blood cell count, serum bilirubin level, and hepatic atrophy. CONCLUSIONS Cholangiocarcinoma should be suspected in patients with hepatolithiasis, especially when, the patient is over 40 years old, has a long history of hepatolithiasis with weight loss, a higher level of serum alkaline phosphatase, a lower level of serum albumin, a serum carcinoembryonic antigen level exceeding 4.2 ng/mL, and hepatolithiasis that is located either in the right or both lobes of the liver.
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Affiliation(s)
- Y-T Kim
- Department of Internal Medicine, Liver Research Institute, Seoul National University College of Medicine, Seoul, Korea.
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Keire DA, Jang YH, Li L, Dasgupta S, Goddard WA, Shively JE. Chelators for radioimmunotherapy: I. NMR and ab initio calculation studies on 1,4,7,10-tetra(carboxyethyl)-1,4,7,10-tetraazacyclododecane (DO4Pr) and 1,4,7-tris(carboxymethyl)-10-(carboxyethyl)-1,4,7,10-tetraazacyclododecane (DO3A1Pr). Inorg Chem 2001; 40:4310-8. [PMID: 11487337 DOI: 10.1021/ic0010297] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [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: 11/28/2022]
Abstract
This work describes the modification of the chelating agent 1,4,7,10-tetraazacyclododecane-N,N',N' ',N' "-tetraacetic acid (DOTA) to improve the rate of metal loading for radioimmunotherapy applications. Previous ab initio calculations predicted that the compounds 1,4,7,10-tetra(carboxyethyl)-1,4,7,10-tetraazacyclododecane (DO4Pr) and 1,4,7-tris(carboxymethyl)-10-(carboxyethyl)-1,4,7,10-tetraazacyclododecane (DO3A1Pr) have a ca. 2000-fold improvement in yttrium metal loading rates compared to those of DOTA (Jang, Y. H.; Blanco, M.; Dasgupta, S.; Keire, D. A.; Shively, J. E.; Goddard, W. A., III. J. Am. Chem. Soc. 1999, 121, 6142-6151). In this study, we report the synthesis, purification, (1)H-NMR chemical shift assignments, pK(a) values, metal loading rate measurements, and additional ab initio calculations of these two compounds. The yttrium loading rates of DO3A1Pr are approximately twice those of DOTA, at pH 4.6 and 37 degrees C. The NMR data indicates that the DO4Pr analogue forms a stable type I complex but does not form a type II complex. The new ab initio calculations performed on DO4Pr and DO3A1Pr indicate that the rate-determining step is the deprotonation of the first macrocycle amine proton, not the second proton as assumed in the previous calculations. The new calculations predict an improvement in the rate of metal loading that more closely matches the experimentally observed change in the rate.
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Affiliation(s)
- D A Keire
- Materials and Process Simulation Center, Beckman Institute (139-74), California Institute of Technology, Pasadena, California 91125, USA
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Kim YT, Kim J, Jang YH, Lee WJ, Ryu JK, Park YK, Kim SW, Kim WH, Yoon YB, Kim CY. Genetic alterations in gallbladder adenoma, dysplasia and carcinoma. Cancer Lett 2001; 169:59-68. [PMID: 11410326 DOI: 10.1016/s0304-3835(01)00562-6] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.7] [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: 01/28/2023]
Abstract
Adenoma and dysplasia in the gallbladder (GB) have been reported as precancerous lesions, but the genetic evidence of this is not clearly defined. The purpose of this study was to analyze the frequencies of K-ras, p53, and p16 gene mutations, of microsatellite instability (MI) and of loss of heterozygosity (LOH) in GB cancer, dysplasia, and adenoma. Tissues from 15 GB cancers, five dysplasias around cancerous tumors, and three adenomas were collected prospectively. The mutation rates of K-ras, p53, and p16 were 20.0, 35.7, and 30.7%, respectively, in GB cancers. However, no mutations were found in dysplasia or adenoma. Reduced staining for p16 was seen in 23% of carcinomas. All of the GB carcinomas and four out of five (80%) of the dysplasias showed LOH in a minimum of one locus, but one out of three (33%) cases of adenoma displayed LOH in only one locus. All of the loci of LOH in the dysplasias, except one, showed the same patterns of allelic loss as the adjacent carcinomas. Only one dysplasia showed multiple MI. In conclusion, multiple LOH may be associated with the development of dysplasia and the malignant transformation of GB carcinoma. Gene alterations of K-ras, p53, and p16 are important steps in the malignant changes of dysplasia. However, MI seems to have only a limited role in GB cancer development.
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Affiliation(s)
- Y T Kim
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, South Korea.
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15
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La Francois CJ, Jang YH, Cagin T, Goddard WA, Sowers LC. Conformation and proton configuration of pyrimidine deoxynucleoside oxidation damage products in water. Chem Res Toxicol 2000; 13:462-70. [PMID: 10858319 DOI: 10.1021/tx990209u] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.4] [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: 11/28/2022]
Abstract
Emerging data strongly suggest that the oxidation of DNA bases can contribute to genomic instability. Structural changes to DNA, induced by base oxidation, may reduce the fidelity of DNA replication and interfere with sequence-specific DNA-protein interactions. We have examined the structures of a series of pyrimidine deoxynucleoside oxidation damage products in aqueous solution. The modified nucleosides studied include the deoxynucleoside derivatives of 5-hydroxyuracil, 5-hydroxycytosine, 5-(hydroxymethyl)uracil, 5-(hydroxymethyl)cytosine, 5-formyluracil, and 5-formylcytosine. The influence of base oxidation on ionization constants, sugar conformation, and tautomeric configuration has been determined on the basis of UV, proton, and nitrogen NMR spectra of the (15)N-enriched derivatives. The potential biological consequences of the structural perturbations resulting from base oxidation are discussed.
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Affiliation(s)
- C J La Francois
- Division of Pediatrics, Beckman Research Institute, City of Hope National Medical Center, 1500 East Duarte Road, Duarte, California 91010, USA
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16
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Kim DW, Son KH, Jang YH, Kim TS, Cho NJ, Lee CG. Adsorption of a mixture of Thiobacillus thiooxidans and Thiobacillus ferrooxidans onto copper-containing furnace dust. J Biosci Bioeng 2000; 90:115-7. [PMID: 16232828 DOI: 10.1016/s1389-1723(00)80044-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/1999] [Accepted: 04/04/2000] [Indexed: 10/26/2022]
Abstract
The Langmuir adsorption parameter X(Am) of a mixture of culture of Thiobacillus ferrooxidans and Thiobacillus thiooxidans indicates that these bacteria have preferential and competitive adsorption sites on furnace dust. The constant K(A) of the mixture significantly larger than that of each component, suggesting that a synergistic effect may occur in the binding of these bacteria to the dust.
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Affiliation(s)
- D W Kim
- Department of Chemistry, Chungbuk National University, Chongju 361-763, Korea
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Kim JW, Yang IA, Oh EA, Rhyoo YG, Jang YH, Ryang DW, Yoo JY. C-reactive protein, sialic acid and adenosine deaminase levels in serum and pleural fluid from patients with pleural effusion. Korean J Intern Med 1988; 3:122-7. [PMID: 3154188 PMCID: PMC4534954 DOI: 10.3904/kjim.1988.3.2.122] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Laboratory analysis of pleural fluids is essential to determine underlying diseases. The authors evaluated the clinical significance of C-reactive protein (C-RP), sialic acid (SA), and adenosine deaminase (ADA) determinations in sera and pleural fluids from 37 patients with pleural effusion. (FP12)C-RP and sialic acid levels and ADA activities were higher in exudates than in transudates of pleural fluids. Serum and pleural fluid C-RP levels were high in patients with pyothorax. Determinations of serum sialic acid and the pleural fluid to serum ratio were useful for the differential diagnosis of pulmonary tuberculosis and malignancy. ADA activities of pleural fluid and serum are useful for the differentiation of malignancy from tuberculosis and nonspecific pyothorax. C-RP concentrations of pleural fluid correlated to serum levels. However, concentrations of sialic acid and ADA activities were not correlated to serum levels and only correlated to protein concentrations of pleural fluids.
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