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Abstract
PURPOSE To implement a computer-aided detection system for kidney segmentation and kidney tumor detection on abdominal computed tomography (CT) scans. MATERIAL AND METHODS Abdominal CT images were digitized with a film digitizer, and a gray-level threshold method was used to segment the kidney. Based on texture analysis performed on sample images of kidney tumors, a portion of the kidney tumor was selected as seed region for start point of the region-growing process. The average and standard deviations were used to detect the kidney tumor. Starting at the detected seed region, the region-growing method was used to segment the kidney tumor with intensity values used as an acceptance criterion for a homogeneous test. This test was performed to merge the neighboring region as kidney tumor boundary. These methods were applied on 156 transverse images of 12 cases of kidney tumors scanned using a G.E. Hispeed CT scanner and digitized with a Lumisys LS-40 film digitizer. RESULTS The computer-aided detection system resulted in a kidney tumor detection sensitivity of 85% and no false-positive findings. CONCLUSION This computer-aided detection scheme was useful for kidney tumor detection and gave the characteristics of detected kidney tumors.
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Affiliation(s)
- D Y Kim
- Department of Information and Communication Engineering, Chungnam National University, Republic of Korea.
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202
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Lim DH, Kim DY, Kang MK, Kim YI, Kang WK, Park CK, Kim S, Noh JH, Joh JW, Choi SH, Sohn TS, Heo JS, Park CH, Park JO, Lee JE, Park YJ, Nam HR, Park W, Ahn YC, Huh SJ. Patterns of failure in gastric carcinoma after D2 gastrectomy and chemoradiotherapy: a radiation oncologist's view. Br J Cancer 2004; 91:11-7. [PMID: 15162146 PMCID: PMC2364765 DOI: 10.1038/sj.bjc.6601896] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [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] [Indexed: 12/15/2022] Open
Abstract
The risk of locoregional recurrence in resected gastric adenocarcinoma is high, but the benefit of adjuvant treatment remains controversial. In particular, after extended lymph node dissection, the role of radiotherapy is questionable. Since 1995, we started a clinical protocol of adjuvant chemoradiotherapy after D2 gastrectomy and analysed the patterns of failure for 291 patients. Adjuvant chemotherapy consisted of five cycles of fluorouracil and leucovorin, and concurrent radiotherapy was given with 4500 cGy from the second cycle of chemotherapy. With a median follow-up of 48 months, 114 patients (39%) showed any type of failure, and the local and regional failures were seen in 7% (20 out of 291) and 12% (35 out of 291), respectively. When the recurrent site was analysed with respect to the radiation field, in-field recurrence was 16% and represented 35% of all recurrences. Our results suggest that adjuvant chemoradiotherapy has a potential effect on reducing locoregional recurrence. Moreover, low locoregional recurrence rates could give a clue as to which subset of patients could be helped by radiotherapy after D2 gastrectomy. However, in order to draw a conclusion on the role of adjuvant radiotherapy, a randomised study is needed.
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Affiliation(s)
- D H Lim
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - D Y Kim
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea. E-mail:
| | - M K Kang
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - Y I Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - W K Kang
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - C K Park
- Department of Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - S Kim
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - J H Noh
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - J W Joh
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - S H Choi
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - T S Sohn
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - J S Heo
- Department of Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - C H Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - J O Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - J E Lee
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - Y J Park
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - H R Nam
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - W Park
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - Y C Ahn
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
| | - S J Huh
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-dong, Kangnam-gu, Seoul, 135-710, Korea
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203
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Kim DY, Lee KW, Yun T, Kim JH, Kim DW, Im SA, Kim TY, Heo DS, Bang YJ, Kim NK. Efficacy of platinum-based chemotherapy after cranial irradiation in patients with brain metastasis from non-small cell lung cancer. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.1575] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- D. Y. Kim
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - K. W. Lee
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - T. Yun
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - J. H. Kim
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - D. W. Kim
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - S. A. Im
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - T. Y. Kim
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - D. S. Heo
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Y. J. Bang
- Seoul National University College of Medicine, Seoul, Republic of Korea
| | - N. K. Kim
- Seoul National University College of Medicine, Seoul, Republic of Korea
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204
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Im SA, Kim DY, Nam E, Joo YH, Lee KE, Moon BI, Sung SH, Park HY, Lee SN. Expression of cyclooxygenase-2 in Korean breast cancer patients and the in vitro growth inhibitory effect of celecoxib in breast cancer cells. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.9715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- S.-A. Im
- Seoul National University Hospital, Seoul, Republic of Korea; Ewha Womans University, Seoul, Republic of Korea
| | - D. Y. Kim
- Seoul National University Hospital, Seoul, Republic of Korea; Ewha Womans University, Seoul, Republic of Korea
| | - E. Nam
- Seoul National University Hospital, Seoul, Republic of Korea; Ewha Womans University, Seoul, Republic of Korea
| | - Y.-H. Joo
- Seoul National University Hospital, Seoul, Republic of Korea; Ewha Womans University, Seoul, Republic of Korea
| | - K. E. Lee
- Seoul National University Hospital, Seoul, Republic of Korea; Ewha Womans University, Seoul, Republic of Korea
| | - B.-I. Moon
- Seoul National University Hospital, Seoul, Republic of Korea; Ewha Womans University, Seoul, Republic of Korea
| | - S. H. Sung
- Seoul National University Hospital, Seoul, Republic of Korea; Ewha Womans University, Seoul, Republic of Korea
| | - H.-Y. Park
- Seoul National University Hospital, Seoul, Republic of Korea; Ewha Womans University, Seoul, Republic of Korea
| | - S. N. Lee
- Seoul National University Hospital, Seoul, Republic of Korea; Ewha Womans University, Seoul, Republic of Korea
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205
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Affiliation(s)
- Y K Choi
- Korea Research Institute of BioScience and Biotechnology, Daejon 305-333, Republic of Korea
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206
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Abstract
Samples of 249 bovine abortuses, one intestine, and four diarrheal stools from 254 cows were collected, and bovine viral diarrhea virus (BVDV) was detected by reverse transcription-polymerase chain reaction (RT-PCR). Subsequently, virus isolation was preformed with PCR-positive samples, and then PCR product of 5′-untranslated region (UTR) of BVDV isolate was sequenced and analyzed. Among the samples collected, 20 (from 17 bovine abortuses, one intestine, and two diarrheal stools) were positive for BVDV RT-PCR; four BVDVs (from two bovine abortuses, one intestine, and one diarrheal stool) were isolated. When the four isolates were biotyped in cell culture, one BVDV isolate from a bovine abortus was cytopathic and the others were non-cytopathic. In addition, three isolates were genotyped as BVDV-1 and one isolate from a diarrheal stool as BVDV-2. In phylogenetic analysis, it suggested that the BVDV-2 isolate in Korea is closer to the North American strains than Asian strains. This is the first report on the identification and isolation of BVDV-2 in Korea.
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Affiliation(s)
- J S Park
- Department of Veterinary Medicine Virology Lab, The Xenotransplantation Research Center, College of Veterinary Medicine and School of Agricultural Biotechnology, Seoul National University, 151-742, Seoul, Republic of Korea
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207
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Yoon Y, Ok YS, Kim DY, Kim JG. Agricultural recycling of the by-product concentrate of livestock wastewater treatment plant processed with VSEP RO and bio-ceramic SBR. Water Sci Technol 2004; 49:405-412. [PMID: 15137451] [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: 05/24/2023]
Abstract
One of the problems in a reverse osmosis process for livestock wastewater treatment is disposal of the by-product concentrate. The agricultural recycling of the concentrate is more cost saving than a further treatment. Application of the concentrate reduces the chemical fertilizer amendment. The agricultural recycling of the concentrate from the Kimhae livestock wastewater treatment plant, processed with the VSEP RO and bio-ceramic SBR, was studied. The concentrate includes non-biodegradable humic ubstance and residual inorganic ions (NH4+, NO3-, PO4(3-), K+, etc.). The contents of N, P and K were 1,650, 382 and 2,059 mg L(-1), respectively. The total acidity of humic acids extracted from the concentrate was 5.17 cmol(+) g(-1), composed of 2.38 cmol(+) g(-1) of carboxylic group and 2.79 cmol(+) g(-1) of phenolic hydroxyl group. Coliforms and E. coli were not detected in the concentrate. The yield of rice plant with the concentrate applied to it resulted in similar production to that with chemical fertilizer applied. The water extractable nitrate content of the concentrate-applied land did not exceed that of chemical fertilizer applied, at soil depths of 30 and 60 cm. The percolated amount of nitrate into the water table in arable land with the concentrate applied showed a similar level to that treated with the chemical fertilizer.
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Affiliation(s)
- Y Yoon
- Environmental Vision 21, Ltd. Korea Bidg. 789-6, Yoksam, Gangnam, Seoul 135-080, Korea.
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208
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Choi YK, Kang MS, Sohn HR, Kim DY. Disseminated ciliated protozoan infection in a Pacific dolphin (Tursiops gilli). Vet Rec 2003; 153:714-5. [PMID: 14690077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Affiliation(s)
- Y K Choi
- Korea Research Institute of Bioscience and Biotechnology, Taejon, Korea
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209
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Lee JD, Chon JS, Jeong HK, Kim HJ, Yun M, Kim DY, Kim DI, Park CI, Yoo HS. The cerebrovascular response to traditional acupuncture after stroke. Neuroradiology 2003; 45:780-4. [PMID: 12942221 DOI: 10.1007/s00234-003-1080-3] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2003] [Accepted: 06/30/2003] [Indexed: 10/26/2022]
Abstract
Acupuncture is useful in treating the nausea and vomiting related to chemotherapy, adult postoperative surgery pain and postoperative dental pain. We obtained single-photon emission computed tomography (SPECT) brain perfusion images of six patients with middle cerebral artery occlusion obtained before and after acupuncture and compared the changes in regional cerebral blood flow (rCBF) to those in normal control. Images were obtained before and after acupuncture at six traditional acupoints (LI 4, 10, 11, 15 and 16 and TE5) in the affected arm. The baseline image was subtracted from the postacupuncture image, to produce a subtraction image displaying only voxels with values >2 SD from the mean and those voxels were coregistered to the baseline SPECT or T2-weighted MRI. Similar images were obtained before and after acupuncture of eight normal volunteers. Statistical parametric mapping with a threshold of P =0.001 and a corrected P of 0.05 was performed for group comparison between postacupuncture and baseline SPECT. Focally increased CBF was seen in all patients especially in the hypoperfused zone surrounding the ischaemic lesion, the ipsilateral or contralateral sensorimotor area, or both. Normal subjects showed increased rCBF mainly in the parahippocampal gyrus, premotor area, frontal and temporal areas bilaterally and ipsilateral globus pallidus. Acupuncture stimulation after stroke patients appears to activate perilesional or use-dependent reorganised sites and might be a way of looking at brain reorganisation.
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Affiliation(s)
- J D Lee
- Division of Nuclear Medicine, Department of Diagnostic Radiology, Yonsei University College of Medicine, 134 Shinchon-dong, Seodaemun-gu, 120-752 Seoul, South Korea.
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210
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Kim DY, Ryu SY, Kim YJ, Kim SK. Clinicopathological characteristics of gastric carcinoma in young patients. Langenbecks Arch Surg 2003; 388:245-9. [PMID: 12861416 DOI: 10.1007/s00423-003-0387-1] [Citation(s) in RCA: 35] [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] [Received: 02/10/2003] [Accepted: 05/13/2003] [Indexed: 01/22/2023]
Abstract
BACKGROUND AND AIMS Gastric carcinoma is a common disease that usually affects older patients, rarely younger patients. Although the relationship between prognosis and the age of patients with gastric carcinoma is controversial, most investigators have suggested that young patients have a poorer prognosis. This study examined the clinicopathological features of young patients with gastric carcinoma. PATIENTS AND METHODS We retrospectively reviewed the hospital records of 1,833 patients with gastric carcinoma to compare the clinicopathological findings in young (aged <36 years) and older (aged >/= 36 years) patients during the period 1988 to 1998 in a tertiary referral center in Gwangju City. Overall survival was the main outcome measure. RESULTS Of the 1,833 patients, 137 (7.5%) were in the young age group. There were no significant differences in depth of invasion, lymph node invasion, hepatic metastasis, peritoneal dissemination, tumor stage or rate of curative resection. A significantly higher percentage of young patients had poorly differentiated histology ( P=0.0001). The young patients with curatively resected gastric carcinoma had a better survival rate than young patients with non-resected gastric carcinoma ( P<0.001). The 5-year survival rates of young and older patients did not differ statistically (39.6% vs 42.4%; P=0.254). CONCLUSION Young patients with gastric carcinoma do not have a worse prognosis than older patients. The important prognostic factor was whether the patients underwent curative resection.
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Affiliation(s)
- D Y Kim
- Division of Gastroenterological Surgery, Department of Surgery, Chonnam National University Medical School, 8 Hakdong, Dongku, Gwangju, Korea.
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211
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Park SH, Kim DY, Heo JS, Lim DH, Park CK, Lee KW, Choi SH, Sohn TS, Kim S, Noh JH, Kim YI, Park JO, Kim K, Kim WS, Jung CW, Im YH, Lee MH, Park K, Park CH, Kang WK. Postoperative chemoradiotherapy for gastric cancer. Ann Oncol 2003; 14:1373-7. [PMID: 12954575 DOI: 10.1093/annonc/mdg366] [Citation(s) in RCA: 37] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND We report the results of postoperative chemoradiotherapy after curative resection in gastric cancer patients. PATIENTS AND METHODS Patients with gastric cancer staged IB to IV(M0) were treated with chemoradiotherapy after curative resection with extensive (D2) lymph node dissection. Nodal metastases were observed in 261 (90%) patients. The chemotherapy consisted of fluorouracil 400 mg/m(2) plus leucovorin 20 mg/m(2) for 5 days, followed by 4500 cGy of radiotherapy for 5 weeks with fluorouracil and leucovorin on the first 4 days and the last 3 days of radiotherapy. Two 5-day cycles of chemotherapy were given 4 weeks after the completion of radiotherapy. RESULTS Of 290 patients accrued, 229 (79%) patients completed chemoradiotherapy as planned. With a median follow-up of 49 months, 114 (34%) patients have relapsed: 33 (29%) locoregional relapses, 76 (67%) peritoneal relapses and 41 (36%) distant metastases. The 5-year overall and relapse-free survivals were 60% and 57%, respectively. Tolerance was acceptable, the main toxicity being neutropenia. CONCLUSIONS This postoperative chemoradiotherapy after curative resection of gastric cancer was feasible, with acceptable toxicities. Whether this adjuvant therapy in gastric cancer patients that have undergone a D2 lymph node dissection impacts on survival or reduces the incidence of relapses remains to be studied.
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Affiliation(s)
- S H Park
- Division of Hematology and Oncology, Department of Medicine, Cancer Center, Samsung Medical Center, Sunkyunkwan University School of Medicine, Seoul, Korea
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212
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Abstract
The purpose of this study was to determine whether alcohol extracts of herbs (Sophora flavescens Aiton, Sinomenium acutum (Thunb.) Rehder and E.H. Wilson, Pulsatilla koreana (Yabe ex Nakai) Nakai ex T. Mori, Ulmus macrocarpa Hance and Torilis japonica (Houtt.) DC.) from South Korea, possess in vitro anti-protozoal activity against cultures of Toxoplasma gondii and Neospora caninum. These herbs have been used as human anti-parasitics in Asian countries for many years. Alcohol extracts of these herbs were serially diluted to final concentrations ranging from 625 to 19.5 ng/ml in media and added to wells containing either T. gondii or N. caninum tachyzoites in equine dermal (ED) cells. Parasite growth inhibition was measured using 3H-uracil incorporation as compared to untreated controls. T. japonica inhibited T. gondii proliferation by 99.3, 95.5, 73.0 and 54.0% in the range from 156 to 19.5 ng/ml, and S. flavescens inhibited T. gondii proliferation by 98.7, 83.0 and 27.2% in the range from 156 to 39 ng/ml. T. japonica inhibited N. caninum proliferation by 97.8, 97.9, 85.3 and 46.4% in the range from 156 to 19.5 ng/ml. S. flavescens inhibited N. caninum proliferation by 98.6, 97.0, 69.5 and 14.0% in the range from 156 to 19.5 ng/ml. Toxicity to host cells was noted when concentrations of T. japonica and S. flavescens exceeded 625 ng/ml. The herb extracts from S. acutum, Pulsatilla koreana, and U. macrocarpa also showed toxicity at higher levels but did not achieve the same inhibition effects at the lower concentrations against T. gondii and N. caninum as T. japonica and S. flavescens.
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Affiliation(s)
- H J Youn
- Department of Veterinary Parasitology, College of Veterinary Medicine, Seoul National University, Seoul, South Korea.
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213
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Kim DH, Kim SW, Song YJ, Oh TY, Han SU, Kim YB, Joo HJ, Cho YK, Kim DY, Cho SW, Kim MW, Kim JH, Hahm KB. Long-term evaluation of mice model infected with Helicobacter pylori: focus on gastric pathology including gastric cancer. Aliment Pharmacol Ther 2003; 18 Suppl 1:14-23. [PMID: 12925137 DOI: 10.1046/j.1365-2036.18.s1.4.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [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: 01/05/2023]
Abstract
BACKGROUND Long-term evaluation of gastric pathology after H. pylori infection is very important in order to reveal its clinical implications, since debate still exists on the gastric carcinogenesis provoked by H. pylori infection in animal models. AIM Either to evaluate the long-term outcome of H. pylori infection or to determine how H. pylori could provoke gastric cancer in the mice model. METHODS Four-week-old specific pathogen free C57BL/6 mice (n = 115) were infected with SS1, the mouse-adapted H. pylori strain. After 4, 8, 16, 24, 36, 50 and 80 weeks of bacterial infection, the H. pylori-infected mice were sacrificed. RESULTS After 80 weeks of infection, almost all the H. pylori-infected mice developed hyperplastic gastritis, but did not show any evidence of gastric adenoma, dysplasia or carcinoma. PCNA positive cells were most abundant after 50 weeks and tended to decrease thereafter up to 80 weeks, whereas apoptosis began to be noted 8 weeks after H. pylori infection, showing 7-8 apoptotic cells/high power field, and tending to increase as time passed. Normally observed neutral mucin decreased during the experiment, showing the most marked decrease 50 weeks after H. pylori infection. In contrast, acidic mucin was noted from 50 weeks after infection. CONCLUSION The SS1-infected mouse seems to be a suitable animal model for H. pylori-related research, and H. pylori itself does not induce gastric cancer in normal wild-type mouse model following long-term exposure, which could be explained by the balance that exists between cell proliferation and apoptosis.
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Affiliation(s)
- D H Kim
- Genomic Research Center for Gastroenterology and Ajou Helicobacter pylori Research Group, Ajou University School of Medicine, Suwon, Korea
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214
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Abstract
Osteoarthritis (OA) is the most common joint disease in horses. Chondrocyte apoptosis has been implicated as a major pathological OA change in humans and experimental animals but no studies have been performed on equine OA. Articular cartilage was collected from three normal and five OA horses. Histopathological changes were scored by a modified Mankin grading system. A terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assay was performed to identify chondrocyte apoptosis. Nitric oxide (NO) production from chondrocytes was indirectly evaluated by immunohistochemistry with polyclonal antibody to nitrotyrosine. The histopathological score and percentage of chondrocyte apoptosis from the OA cartilages were significantly higher than from normal cartilages. There was a significant correlation between histopathological grade and the percentage of chondrocyte apoptosis. OA cartilages exhibited stronger immunoreactivity to nitrotyrosine than normal cartilage. Topographical distributions of chondrocyte apoptosis, cartilage matrix degeneration, and NO production overlapped in equine OA cartilages, suggesting that these pathological phenomena are closely interrelated.
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Affiliation(s)
- D Y Kim
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
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215
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Affiliation(s)
- S M Jeong
- Department of Veterinary Surgery, College of Veterinary Medicine and School of Agricultural Biotechnology, Seoul National University, Seoul, Republic of Korea
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216
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Kim DY, Rhee YH. Biodegradation of microbial and synthetic polyesters by fungi. Appl Microbiol Biotechnol 2003; 61:300-8. [PMID: 12743758 DOI: 10.1007/s00253-002-1205-3] [Citation(s) in RCA: 164] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2002] [Revised: 11/22/2002] [Accepted: 11/22/2002] [Indexed: 11/26/2022]
Abstract
A variety of biodegradable polyesters have been developed in order to obtain useful biomaterials and to reduce the impact of environmental pollution caused by the large-scale accumulation of non-degradable waste plastics. Polyhydroxyalkanoates, poly(epsilon-caprolactone), poly( l-lactide), and both aliphatic and aromatic polyalkylene dicarboxylic acids are examples of biodegradable polyesters. In general, most aliphatic polyesters are readily mineralized by a number of aerobic and anaerobic microorganisms that are widely distributed in nature. However, aromatic polyesters are more resistant to microbial attack than aliphatic polyesters. The fungal biomass in soils generally exceeds the bacterial biomass and thus it is likely that fungi may play a considerable role in degrading polyesters, just as they predominantly perform the decomposition of organic matter in the soil ecosystem. However, in contrast to bacterial polyester degradation, which has been extensively investigated, the microbiological and environmental aspects of fungal degradation of polyesters are unclear. This review reports recent advances in our knowledge of the fungal degradation of microbial and synthetic polyesters and discusses the ecological importance and contribution of fungi in the biological recycling of waste polymeric materials in the biosphere.
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Affiliation(s)
- D Y Kim
- Department of Microbiology, Chungnam National University, Daejeon, 305-764 Korea
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217
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Hyun SH, Lee GS, Kim DY, Kim HS, Lee SH, Kim S, Lee ES, Lim JM, Kang SK, Lee BC, Hwang WS. Effect of maturation media and oocytes derived from sows or gilts on the development of cloned pig embryos. Theriogenology 2003; 59:1641-9. [PMID: 12559468 DOI: 10.1016/s0093-691x(02)01211-6] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [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
In order to develop a culture system and recipient cytoplasm that could improve the developmental competence of somatic cell nuclear transfer (SCNT) embryos for successful cloning of pigs, we evaluated the effect of donor oocytes and in vitro maturation (IVM) media on maturation of oocytes and developmental competence of SCNT embryos. In Experiment 1, oocytes derived from sows or gilts were matured in two IVM media (TCM-199 versus NCSU-23) and maturation of oocytes was evaluated by the status of chromatin configuration, the diameter of matured oocytes, the thickness of the zona pellucida, and the size of the perivitelline space (PVS). Sow oocytes matured in TCM-199 (S-TCM group) and NCSU-23 (S-NCSU group) showed significantly higher (P<0.05) maturation rates (S-TCM and S-NSCU, 86+/-4 and 82+/-4%, respectively) when evaluated by metaphase-II status than the gilt oocytes matured in TCM-199 (G-TCM group, 71+/-3%) and in NCSU-23 (G-NCSU-23 group, 71+/-3%). Oocyte diameter, the thickness of the zona pellucida, and the perivitelline space of sow oocytes (S-TCM and S-NCSU) were larger than those of gilt oocytes (G-TCM and G-NCSU) after IVM (P<0.05). In Experiment 2, SCNT was performed, using in vitro-matured oocytes from each group as recipient cytoplasm and porcine fetal fibroblasts as karyoplasts. The reconstructed embryos were electrically fused and activated, and cleavage and blastocyst formation were monitored under a stereomicroscope. The total cell number of flattened blastocysts stained with 5 microM bisbenzimide on day 7 were counted. In addition, in vitro matured non-enucleated oocytes were also electrically activated (parthenogenetic activation) and pronuclear formation was monitored. No difference in pronuclear formation rate after parthenogenetic activation and fusion rate after SCNT was observed among experimental groups. A significantly higher cleavage rate (P<0.05) was observed in S-TCM (69+/-4%) when compared with only G-NCSU (58+/-4%), but not with G-TCM (60+/-4%) or S-NCSU (68+/-4%). The rate of blastocyst formation was significantly higher (P<0.05) in sow oocytes (24% in S-TCM and S-NCSU), when compared to that observed in G-TCM (15%), and G-NCSU (14%). When the same source of oocytes was used, there was no significant difference in rate of blastocyst formation in the two culture media. Total cell number of blastocysts were not significantly different among experimental groups. In conclusion, the present study clearly demonstrated that sow oocytes have a greater developmental competence than gilt oocytes, regardless of the maturation medium examined.
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Affiliation(s)
- S H Hyun
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, South Korea
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218
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Kim DY, Kim JH, Lee SH, Kim TY, Heo DS, Bang YJ, Kim NK. Phase II study of oxaliplatin, 5-fluorouracil and leucovorin in previously platinum-treated patients with advanced gastric cancer. Ann Oncol 2003; 14:383-7. [PMID: 12598342 DOI: 10.1093/annonc/mdg106] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.1] [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: 11/13/2022] Open
Abstract
BACKGROUND Oxaliplatin shows preclinical activity in many cancer cell lines that are resistant to cisplatin, and also has synergism with 5-fluorouracil (5-FU). We undertook this study to evaluate the efficacy and toxicities of a combined oxaliplatin, 5-FU and leucovorin (LV) continuous infusion regimen in patients with advanced gastric cancer who progressed during or after treatment with 5-FU and platinum compounds. PATIENTS AND METHODS Twenty-six patients with advanced gastric cancer, whose disease progressed while receiving, or after discontinuing, chemotherapy with a 5-FU and platinum regimen, were enrolled in this study. Treatment comprised oxaliplatin (85 mg/m2 on day 1) as a 2-h infusion followed by bolus 5-FU (400 mg/m2 on day 1), and 48-h infusion of 5-FU 2.4-3.0 g/m2 concurrently with LV 150 mg/m2. Cycles were repeated at 2-week intervals. RESULTS Of the 23 evaluable patients, there were six partial responses (response rate 26%). All responding patients were among those who entered into this trial immediately after failure of previous chemotherapy with 5-FU and cisplatin. The median time to progression was 4.3 months and the median overall survival was 7.3 months. The most common hematologic toxicity was grade 1-2 anemia in 39 cycles (39%). No grade 4 leukopenia or thrombocytopenia were observed. The most common non-hematologic toxicity was nausea/vomiting (33%). Peripheral neuropathy of grade 1 or 2 was noted (27%), but there was no grade 3 or 4 neurotoxicity. CONCLUSIONS This phase II study of oxaliplatin, 5-FU and LV continuous infusion showed activity in previously platinum-treated patients with advanced gastric cancer, with acceptable toxicities.
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Affiliation(s)
- D Y Kim
- Department of Internal Medicine, Cancer Research Institute, Seoul National University College of Medicine, Seoul, Korea
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Abstract
A malignant peripheral nerve sheath tumor with divergent osteogenic, myxomatous, and myoblastic differentiations is described in a 10.5-year-old male Labrador Retriever dog. The tumor involved the sixth and seventh cervical spinal cord segments and nerves. The diagnosis was based on the results of histopathology, electron microscopy, and immunohistochemistry.
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Affiliation(s)
- D Y Kim
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
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220
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Yu DY, Yu SL, Sang BC, Kim DY. Characterization of Korean Cattle Keratin IV Gene. Asian Australas J Anim Sci 2003. [DOI: 10.5713/ajas.2003.1055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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221
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Abstract
BACKGROUND/AIMS Mucinous gastric carcinoma (MGC) is a histopathologic subtype of gastric carcinoma with a poor prognosis. The purpose of this study was to compare the disease course of MGC with non-mucinous gastric carcinoma (NMGC) and study the clinicopathologic features that influence the prognosis of MGC patients. METHODS We reviewed the records of 2,383 patients with a confirmed histologic diagnosis of gastric carcinoma. There were 157 patients with MGC compared to 2,226 with NMGC. RESULTS A depth of invasion greater than T3 was more frequently found in MGC than in NMGC. The mean number of lymph nodes with metastases was 2.78 in MGC and 2.28 in NMGC (p < 0.001). There were more MGC patients with TNM stages II through IV (UICC classification). The overall survival rate was lower for the MGC group (46.5%) than for the NMGC group (64.0%; p < 0.05). Depth of invasion, lymph node metastases, and stage at diagnosis were significant factors affecting the outcome. CONCLUSION The factors influencing the poorer prognosis (lower 5-year survival rate) of MGC are the advanced stage at the time of diagnosis, lymph node metastases, and a higher TNM status. Mucinous histologic type itself was not an independent predictive factor in survival.
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Affiliation(s)
- Sang Woo Lim
- Division of Gastroenterologic Surgery, Department of Surgery, Chonnam National University Hospital, Kwangju, South Korea.
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222
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Abstract
Parastrongylus (=Angiostrongylus) cantonensis, a lung worm of rats, was first reported in the United States in 1987, with a probable introduction by infected rats from ships docking in New Orleans, Louisiana, during the mid-1980s. Since then, it has been reported in nonhuman primates and a boy from New Orleans, and in a horse from Picayune, Mississippi, a distance of 87 km from New Orleans. Parastrongylus cantonensis infection is herein reported in a lemur (Varencia variegata rubra) from New Iberia, Louisiana, a distance of 222 km from New Orleans, and in a wood rat (Neotomafloridanus) and in 4 opossums (Didelphis virginiana) from Baton Rouge, Louisiana, a distance of 124 km from New Orleans. The potential of a great variety of gastropods serving as intermediate hosts in Louisiana may pose a threat to wildlife as well as to domesticated animals in the areas where infected Norway rats (Rattus norvegicus) are present.
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Affiliation(s)
- D Y Kim
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge 70803, USA.
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223
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Kim DY, Stewart TB, Bauer RW, Mitchell M. Parastrongylus (=Angiostrongylus) cantonensis Now Endemic in Louisiana Wildlife. J Parasitol 2002. [DOI: 10.2307/3285552] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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224
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Lim YA, Hyun BH, Kim DY. Effect of transfusion of fresh-frozen plasma on recipients' antibodies to hepatitis B surface antigen and hepatitis B surface antigen status in countries where hepatitis B virus is endemic. Vox Sang 2002; 83:209-13. [PMID: 12366761 DOI: 10.1046/j.1423-0410.2002.00222.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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: 11/20/2022]
Abstract
BACKGROUND AND OBJECTIVES Antibodies to hepatitis B virus (HBV) that are passively acquired through transfusions may lead to confusion and inappropriate clinical decisions. We evaluated the effects of transfusing fresh-frozen plasma (FFP) on serological tests for HBV antibodies in patients without such antibodies. MATERIALS AND METHODS Tests for HBV surface antigen (HBsAg), and for antibodies to HBV surface antigen (anti-HBs) and HBV core antigen (anti-HBc), were carried out using enzyme immunoassay on the FFP and sera of 50 patients transfused with FFP containing anti-HBs. RESULTS After FFP transfusion, the incidences of 'false' positivity for anti-HBs and anti-HBc were 64% (32/50) and 100% (seven of seven), respectively, and of 'false' negativity for HBsAg was 18.8% (three of 16) in previously positive patients. The post-transfusion seropositivity for antibodies results from passive transmission, whereas the inability to detect HBsAg is the result of decreased detectable levels. CONCLUSIONS Laboratory staff and clinicians alike should be cautious in interpreting the results of the HBV marker tests in patients who have recently been transfused, and in obtaining specimens for such studies.
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Affiliation(s)
- Y A Lim
- Department of Laboratory Medicine, Ajou University School of Medicine, Suwon, Korea.
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225
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Park W, Kim WH, Lee CH, Kim DY, Choi JH, Huh JW, Sung HM, Kim IS, Kweon OK. Comparison of two fibrin glues in anastomoses and skin closure. J Vet Med A Physiol Pathol Clin Med 2002; 49:385-9. [PMID: 12440795 DOI: 10.1046/j.1439-0442.2002.00468.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
To control intra-operative haemorrhage, fibrin glues are preferred by many surgeons because of their biological advantages and convenience of application. Manufacturers have developed a few kinds of fibrin glues with a little difference in their composition. This study was to compare the effectiveness of two commercially available fibrin glues; Greenplast (Green Cross P. D. Company, Yongin, Korea) and Tisseel (Baxter-Immuno AG, Vienna, Austria). They were applied experimentally to several kinds of surgery in dogs - renal vessel anastomosis, partial splenectomy, intestinal anastomosis and incision skin wound - and evaluated for their haemostatic and adhesive effects. When the two glues were applied in renal vessel anastomosis, the amount of haemorrhage in artery and vein decreased significantly. They also decreased the haemorrhage in partial splenectomy. At 10 min after application of the glues to an incision skin wound, the tensile strengths developed were significantly higher than that of control. The present study indicates that two-component fibrin glues have a haemostatic effect as a mechanical barrier in renal vessel anastomosis and an adhesive effect in the early stage of incision skin wound closure, and the two glues have similar effects with no complications.
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Affiliation(s)
- W Park
- Department of Veterinary Surgery, Veterinary Medical Teaching Hospital, College of Veterinary Medicine, Seoul National University, Korea
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226
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Kim KK, Kim DY. Crystal structure of the protease domain of a heat shock protease. Acta Crystallogr A 2002. [DOI: 10.1107/s010876730209582x] [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: 11/10/2022] Open
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227
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Fatemian M, Kim DY, Poulin MJ, Robbins PA. Long-haul flights may induce respiratory changes similar to ventilatory acclimatisation to altitude. Adv Exp Med Biol 2002; 499:321-3. [PMID: 11729900 DOI: 10.1007/978-1-4615-1375-9_51] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- M Fatemian
- University Laboratory of Physiology, University of Oxford, UK
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228
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Lee DK, Chung CK, Kim HJ, Kim K, Choe G, Moon CW, Kim DY. Multifocal primary CNS T cell lymphoma of the spinal cord. Clin Neuropathol 2002; 21:149-55. [PMID: 12143926] [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: 02/25/2023] Open
Abstract
The majority of primary central nervous system lymphomas (PCNSL) are of B cell origin, and those of T cell origin are a distinct rarity. Furthermore, spinal cord involvement of T cell PCNSL is extremely rare and only a small number of cases have been reported. The authors report a case of multifocal T cell PCNSL mainly involving the intramedullary (IM) portion ofthe spinal cord in a 57-year-old woman. Neurological examination showed right leg weakness and hypesthesia below the T10 level. Magnetic resonance images revealed multiple well enhancing masses in the IM portion ofthe cervical and thoracic spinal cord and the cerebellum. Cytological examination of the cerebrospinal fluid revealed no malignant cells. As the mass at the C7 level was the largest among multiple masses, open biopsy was performed at that level. Histopathological examination confirmed malignant peripheral T cell lymphoma, unspecified (PTCL-U), small- and medium-sized cell type. Clinical and laboratory investigations failed to reveal any evidence of lymphomatous deposits elsewhere in the body. After biopsy, the patient received cranio-spinal irradiation, which included the whole brain and the spinal neuraxis. The clinical course, pathological findings and treatments are discussed and a review of the literature included.
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Affiliation(s)
- D K Lee
- Department of Neurosurgery, Seoul National University College of Medicine and Clinical Research Institute, Seoul National University Hospital, South Korea
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229
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Abstract
Lymphoblastic lymphosarcoma involving the mesenteric lymph node and thymus was discovered in a 4 yr old male sea otter (Enhydra lutris). Diagnosis was based on gross and light microscopic studies. The cause of this neoplasm was not determined. This is the first case of lymphosarcoma reported in sea otters.
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Affiliation(s)
- J H Kim
- National Veterinary Research and Quarantine Service, Anyang, Korea
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230
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Kim BH, Park Y, Kim DY, Paek UC, Han WT. Observation and analysis of residual stress development resulting from OH impurity in optical fibers. Opt Lett 2002; 27:806-808. [PMID: 18007934 DOI: 10.1364/ol.27.000806] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report experimental results on the development of residual stress due to OH impurity in optical fibers. The effect of OH impurity on residual stress is demonstrated by direct residual stress measurement. The residual stress at the outer-cladding/jacketing-tube boundary of the fiber drawn at 3.48 N was found to be -61 MPa . The residual compressive stress is attributed to the viscosity decrease induced by a significant OH impurity at the boundary, as measured by a Fourier transform infrared microscope.
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231
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Kim JH, Lee JK, Yoo HS, Shin NR, Shin NS, Lee KH, Kim DY. Endocarditis associated with Escherichia coli in a sea lion (Zalophus californianus). J Vet Diagn Invest 2002; 14:260-2. [PMID: 12033687 DOI: 10.1177/104063870201400315] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Endocarditis associated with Escherichia coli was diagnosed in a 2-year-old male California sea lion (Zalophus californianus). The diagnosis was based on light microscopic examination and bacterial isolation from the valvular lesion. This is the first case of bacterial endocarditis reported in a sea lion.
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Affiliation(s)
- J H Kim
- National Veterinary Research and Quarantine Service, College of Veterinary Medicine and School of Agricultural Biotechnology, Seoul National University, Suwon, Korea
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232
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McGowan CB, Kim DY, Blumstein RB. Kinetics of enthalpy relaxation upon physical aging in glassy main-chain nematic polymers. Macromolecules 2002. [DOI: 10.1021/ma00044a030] [Citation(s) in RCA: 10] [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: 11/28/2022]
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233
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Kim DY, Li L, Jiang XL, Shivshankar V, Kumar J, Tripathy SK. Polarized Laser Induced Holographic Surface Relief Gratings on Polymer Films. Macromolecules 2002. [DOI: 10.1021/ma00130a017] [Citation(s) in RCA: 224] [Impact Index Per Article: 10.2] [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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234
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Link JM, Reyes M, Yager PM, Anjos JC, Bediaga I, Göbel C, Magnin J, Massafferi A, de Miranda JM, Pepe IM, dos Reis AC, Carrillo S, Casimiro E, Cuautle E, Sánchez-Hernández A, Uribe C, Vazquez F, Agostino L, Cinquini L, Cumalat JP, O'Reilly B, Ramirez JE, Segoni I, Butler JN, Cheung HWK, Gaines I, Garbincius PH, Garren LA, Gottschalk E, Kasper PH, Kreymer AE, Kutschke R, Bianco S, Fabbri FL, Zallo A, Cawlfield C, Kim DY, Rahimi A, Wiss J, Gardner R, Kryemadhi A, Chung YS, Kang JS, Ko BR, Kwak JW, Lee KB, Park H, Alimonti G, Boschini M, D'Angelo P, DiCorato M, Dini P, Giammarchi M, Inzani P, Leveraro F, Malvezzi S, Menasce D, Mezzadri M, Milazzo L, Moroni L, Pedrini D, Pontoglio C, Prelz F, Rovere M, Sala S, Davenport TF, Arena V, Boca G, Bonomi G, Gianini G, Liguori G, Merlo MM, Pantea D, Ratti SP, Riccardi C, Vitulo P, Hernandez H, Lopez AM, Luiggi E, Mendez H, Mendez L, Mirles A, Montiel E, Olaya D, Paris A, Quinones J, Rivera C, Xiong W, Zhang Y, Wilson JR, Cho K, Handler T, Mitchell R, Engh D, Hosack M, Johns WE, Nehring M, Sheldon PD, Stenson K, Vaandering EW, Webster M, Sheaff M. A high statistics measurement of the Lambda(+)(c) lifetime. Phys Rev Lett 2002; 88:161801. [PMID: 11955226 DOI: 10.1103/physrevlett.88.161801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2002] [Indexed: 05/23/2023]
Abstract
A high statistics measurement of the Lambda(+)(c) lifetime from the Fermilab fixed-target FOCUS photoproduction experiment is presented. We describe the analysis technique with particular attention to the determination of the systematic uncertainty. The measured value of 204.6 +/- 3.4 (stat) +/- 2.5 (syst) fs from 8034 +/- 122 Lambda(+)(c)-->pK(-)pi(+) decays represents a significant improvement over the present world average.
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Affiliation(s)
- J M Link
- University of California, Davis, California 95616, USA
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Abstract
Fractionated stereotactic radiotherapy (FSRT) offers a technique to minimize the absorbed dose to normal tissues; therefore, quality assurance is essential for these procedures. In this study, quality assurance for FSRT of 58 cases, between August 1995 and August 1997 are described, and the errors for each step and overall accuracy were estimated. Some of the important items for FSRT procedures are: accuracy in CT localization, transferred image distortion, laser alignment, isocentric accuracy of linear accelerator, head frame movement, portal verification, and various human errors. A geometric phantom, that has known coordinates was used to estimate the accuracy of CT localization. A treatment planning computer was used for checking the transferred image distortion. The mechanical isocenter standard (MIS), rectilinear phantom pointer: (RLPP), and laser target localizer frame (LTLF) were used for laser alignment and target coordinates setting. Head-frame stability check was performed by a depth confirmation helmet (DCH). A film test was done to check isocentric accuracy and portal verification. All measured data for the 58 patients were recorded and analyzed for each item. 4-MV x-rays from a linear accelerator, were used for FSRT, along with homemade circular cones with diameters from 20 to 70 mm (interval: 5 mm). The accuracy in CT localization was 1.2+/-0.5 mm. The isocentric accuracy of the linear accelerator, including laser alignment, was 0.5+/-0.2 mm. The reproducibility of the head frame was 1.1+/-0.6 mm. The overall accuracy was 1.7+/-0.7 mm, excluding human errors.
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Affiliation(s)
- D R Choi
- Department of Medical Physics, Tom Baker Cancer Centre, University of Calgary, Alberta, Canada
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236
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Lee JK, Park JS, Choi JH, Park BK, Lee BC, Hwang WS, Kim JH, Jean YH, Haritani M, Yoo HS, Kim DY. Encephalomyelitis associated with akabane virus infection in adult cows. Vet Pathol 2002; 39:269-73. [PMID: 12009066 DOI: 10.1354/vp.39-2-269] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [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
Between August and September 2000, five 2-7-year-old cows in Korea exhibited neurologic signs and were diagnosed as infected with Akabane virus based on the results of histopathology, immunohistochemistry, serology, and reverse transcription polymerase chain reaction (RT-PCR) analysis. Immunohistochemistry and RT-PCR were equally effective and sensitive for diagnosing Akabane virus infection during the early stage of infection. Typical lymphohistiocytic inflammation characterized by perivascular mononuclear cell infiltration, gliosis, neuronophagia, and neuronal loss was noted in the brain and the ventral horn gray matter of the spinal cord. The lesions in the brain were most prominent in the pons and medulla oblongata. Akabane virus antigen was detected in the brain and spinal cord, mainly in degenerating neurons and glial cells. RT-PCR analysis revealed a target band of expected size in four cows. This is the first report on an outbreak of natural Akabane virus infection in adult cattle.
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Affiliation(s)
- J K Lee
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, Suwon, Korea
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237
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Kim DY, Mitchell MA, De las Heras M, Taylor HW, Cho DY. Spontaneous squamous cell carcinoma of the tongue and multiple bronchioloalveolar carcinomas in a Virginia opossum (Didelphis virginiana). J Comp Pathol 2002; 126:226-30. [PMID: 11945013 DOI: 10.1053/jcpa.2001.0530] [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: 11/11/2022]
Abstract
Two primary tumours, squamous cell carcinoma of the tongue and multiple bronchioloalveolar carcinomas, were diagnosed in a Virginia opossum (Didelphis virginiana). Two oral masses were located in the right ventrolateral surface of the tongue, near the frenulum, and the lungs contained multiple, widely distributed, nodular masses. Microscopically, the oral masses were composed of invasive cords of pleomorphic, polyhedral cells, typical of squamous cells. The multiple pulmonary masses consisted of non-ciliated, cuboidal, columnar, or occasionally polyhedral cells arranged in an alveolar pattern with multifocal areas of necrosis. This is the first report of spontaneous oropharyngeal squamous cell carcinoma in the Virginia opossum. However, multiple pulmonary adenomas have been reported previously in this species, the lesions being similar to those in sheep pulmonary adenomatosis (jaagsiekte). In the present study, immunohistochemical examination of the pulmonary tumours with a rabbit polyclonal antiserum to jaagsiekte retroviral capsid protein proved negative.
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Affiliation(s)
- D Y Kim
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, Louisiana 70803, USA
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Link JM, Reyes M, Yager PM, Anjos JC, Bediaga I, Göbel C, Magnin J, Massafferri A, de Miranda JM, Pepe IM, dos Reis AC, Carrillo S, Casimiro E, Sánchez-Hernández A, Uribe C, Vázquez F, Cinquini L, Cumalat JP, O'Reilly B, Ramirez JE, Vaandering EW, Butler JN, Cheung HWK, Gaines I, Garbincius PH, Garren LA, Gottschalk E, Kasper PH, Kreymer AE, Kutschke R, Bianco S, Fabbri FL, Zallo A, Cawlfield C, Kim DY, Rahimi A, Wiss J, Gardner R, Kryemadhi A, Chung YS, Kang JS, Ko BR, Kwak JW, Lee KB, Park H, Alimonti G, Boschini M, D'Angelo P, DiCorato M, Dini P, Giammarchi M, Inzani P, Leveraro F, Malvezzi S, Menasce D, Mezzadri M, Milazzo L, Moroni L, Pedrini D, Pontoglio C, Prelz F, Rovere M, Sala S, Davenport TF, Agostino L, Arena V, Boca G, Bonomi G, Gianini G, Liguori G, Merlo MM, Pantea D, Ratti SP, Riccardi C, Segoni I, Vitulo P, Hernandez H, Lopez AM, Mendez H, Mendez L, Mirles A, Montiel E, Olaya D, Paris A, Quinones J, Rivera C, Xiong W, Zhang Y, Wilson JR, Cho K, Handler T, Mitchell R, Engh D, Hosack M, Johns WE, Nehring M, Sheldon PD, Stenson K, Webster M, Sheaff M. Search for CP violation in the decays D+--> K(S)pi+ and D+-->K(S)K+. Phys Rev Lett 2002; 88:041602. [PMID: 11801103 DOI: 10.1103/physrevlett.88.041602] [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] [Subscribe] [Scholar Register] [Received: 09/17/2001] [Indexed: 05/23/2023]
Abstract
A high-statistics sample of photoproduced charm from the FOCUS experiment has been used to search for direct CP violation in the decay rates for D+-->K(S)pi+ and D+-->K(S)K+. We have measured the following asymmetry parameters relative to D+-->K-pi+pi+: A(CP)(K(S)pi+) = (-1.6+/-1.5+/-0.9)%, A(CP)(K(S)K+) = (+6.9+/-6.0+/-1.5)%, and A(CP)(K(S)K+) = (+7.1+/-6.1+/-1.2)% relative to D+-->K(S)pi+. We have also measured the relative branching ratios and found Gamma(D+-->K(0)pi+)/Gamma(D+-->K-pi+pi+) = (30.60+/-0.46+/-0.32)%, Gamma(D+-->K(0)K+)/Gamma(D+-->K-pi+pi+) = (6.04+/-0.35+/-0.30)%, and Gamma(D+-->K(0)K+)/Gamma(D+-->K(0)pi+) = (19.96+/-1.19+/-0.96)%.
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Affiliation(s)
- J M Link
- University of California, Davis, California 95616, USA
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Ahn YC, Park K, Kim DY, Kim KM, Kim J, Shim YM, Lee KS, Han J, Kim HJ, Kwon J, Lim DH, Noh YJ, Lee JE, Huh SJ. Preoperative concurrent chemoradiotherapy for stage IIIA non-small cell lung cancer. Acta Oncol 2002; 40:588-92. [PMID: 11669330 DOI: 10.1080/028418601750444123] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Thirty-one patients with stage IIIA non-small cell lung cancer (NSCLC) were treated with preoperative concurrent chemoradiotherapy (CCRT) followed by surgery. The treatment protocol could not be completed in eight patients. The acute hematologic toxicities of grade III or IV occurred in 48.4%, (15/31) after the first chemotherapy cycle, and in 39.1% (9/23) after the second cycle. The most common non-hematologic toxicity was radiation esophagitis. Surgery was attempted in 23 patients and successful in 22 patients (resection rate = 71.0%. Pathologic complete response and down-staging were achieved in 13.6% (3/22) and 68.2% (15/22). The median survival period, 2-year overall survival, local control and disease-free survival rates of all 31 patients and of 22 patients who underwent surgery were 19 months, 37.2%, 49.1%, 35.5%, and 19 months, 43.2%, 51.8%, 25.6%, respectively. On the basis of our observations, preoperative CCRT followed by surgery for stage IIIA NSCLC has resulted in outcomes comparable with those in previous reports.
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Affiliation(s)
- Y C Ahn
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
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Abstract
Suppurative bronchopneumonia was discovered in a 6-yr-old male jaguar (Panthera onca onca) that died after a 1 wk history of anorexia, depression, and respiratory difficulty. Morganella morganii was isolated as a pure culture from the lung, spleen, and heart blood. This is the first record of M. morganii induced pneumonia in a jaguar.
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Affiliation(s)
- J H Choi
- Department of Veterinary Pathology, College of Veterinary Medicine, School of Agricultural Biotechnology, Seoul National University, Suwon, 441-744, Republic of Korea
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Abstract
The Korea Atomic Energy Research Institute (KAERI) is manufacturing CaSO4:Dy Teflon TL pellets which have more sensitivity and stability than commercial TLD. A method is presented of preparing the CaSO4:Dy phosphor-embedded Teflon powder, which is then compressed to a thin pellet form used as the TLD element. Investigations are made to determine optimum preparation conditions and dosimetric characteristics of the CaSO4:Dy Teflon pellet such as the sensitivity, energy response, dose response, fading, re-usability, and lowest level of detection. The results show that the sensitivity of the CaSO4:Dy pellet is 2 times higher than that of the commercial Teledyne CaSO4:Dy pellet. A dose-response was observed to be linear in the range from 10(-5) to 10 Gy. The relative energy response in the low energy region was 9.6 (normalised to the 137Cs gamma source), and the fading rate was about 10% for five months. The re-usability was estimated to be more than 60 cycles, and the low level of detection dose was 22 microGy. From the results, the CaSO4:Dy pellet developed in KAERI can be successfully used in personal dosemeters through appropriate filter design for compensating the energy response.
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Affiliation(s)
- J S Yang
- Health Physics Dept, Kore Atomic Energy Research Institute, Daejeon.
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242
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Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IP, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ. Search for the familon via B(+/-) --> pi+/-X(0), B(+/-) --> K(+/-)X(0), and B(0) --> K(0)(S)X(0) decays. Phys Rev Lett 2001; 87:271801. [PMID: 11800872 DOI: 10.1103/physrevlett.87.271801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2001] [Indexed: 05/23/2023]
Abstract
We have searched for the two-body decay of the B meson to a light pseudoscalar meson h = pi(+/-),K+/-,K(0)(S) and a massless neutral feebly interacting particle X(0) such as the familon, the Nambu-Goldstone boson associated with a spontaneously broken global family symmetry. We find no significant signal by analyzing a data sample containing 9.7x10(6) BBbar mesons collected with the CLEO detector at the Cornell Electron Storage Ring, and set 90% C.L. upper limits italicB(B(+/-) --> h(+/-)X(0)) = 4.9x10(-5) and italicB(B(0) --> K(0)(S)X(0)) = 5.3x10(-5). These limits correspond to a lower bound of approximately 10(8) GeV on the family symmetry breaking scale with vector coupling involving the third generation of quarks.
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Affiliation(s)
- R Ammar
- University of Kansas, Lawrence, Kansas 66045, USA
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243
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Cronin-Hennessy D, Lyon AL, Roberts S, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IP. Hadronic mass moments in inclusive semileptonic B meson decays. Phys Rev Lett 2001; 87:251808. [PMID: 11736567 DOI: 10.1103/physrevlett.87.251808] [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] [Subscribe] [Scholar Register] [Received: 08/16/2001] [Indexed: 05/23/2023]
Abstract
We have measured the first and second moments of the hadronic mass-squared distribution in B-->X(c)l nu, for P(lepton)>1.5 GeV/c. We find <M(2)(X)-M macro(2)(D)> = 0.251+/-0.066 GeV(2), <(M(2)(X)-<M(2)(X)>)(2)> = 0.576+/-0.170 GeV(4), where M macro(D) is the spin-averaged D meson mass. From that first moment and the first moment of the photon energy spectrum in b-->s gamma, we find the heavy quark effective theory parameter lambda(1) (in the modified minimal subtraction renormalization scheme, to order 1/M(3)(B) and beta(0)alpha(2)(s)) to be -0.24+/-0.11 GeV(2). Using these first moments and the B semileptonic width, and assuming parton-hadron duality, we obtain absolute value of V(cb) = 0.0404+/-0.0013.
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244
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Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IP, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V. Branching fraction and photon energy spectrum for b --> s gamma. Phys Rev Lett 2001; 87:251807. [PMID: 11736566 DOI: 10.1103/physrevlett.87.251807] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2001] [Indexed: 05/23/2023]
Abstract
We have measured the branching fraction and photon energy spectrum for the radiative penguin process b-->s gamma. We find Beta(b-->s gamma) = (3.21+/-0.43+/-0.27(+0.18)(-0.10))x10(-4), where the errors are statistical, systematic, and from theory corrections. We obtain first and second moments of the photon energy spectrum above 2.0 GeV, <E( gamma)> = 2.346+/-0.032+/-0.011 GeV, and <E(2)(gamma)>-<E(gamma)>(2) = 0.0226+/-0.0066+/-0.0020 GeV(2), where the errors are statistical and systematic. From the first moment, we obtain (in the modified minimal subtraction renormalization scheme, to order 1/M(3)(B) and beta(0)alpha(2)(s)) the heavy quark effective theory parameter Lambda = 0.35+/-0.08+/-0.10 GeV.
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Affiliation(s)
- S Chen
- Purdue University, West Lafayette, Indiana 47907, USA
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245
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Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Park W, Thorndike EH, Coan TE, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, Jain V, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Eppich A, Hill TS, Morrison RJ, Nelson HN, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J. First measurement of gamma(D*(+)). Phys Rev Lett 2001; 87:251801. [PMID: 11736560 DOI: 10.1103/physrevlett.87.251801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2001] [Indexed: 05/23/2023]
Abstract
We present the first measurement of the D*(+) width using 9/fb of e(+)e(-) data collected near the Upsilon(4S) resonance by the CLEO II.V detector. Our method uses advanced tracking techniques and a reconstruction method that takes advantage of the small vertical size of the Cornell Electron-positron Storage Ring beam spot to measure the energy release distribution from the D*(+)-->D(0)pi(+) decay. We find gamma(D*(+)) = 96+/-4 (stat)+/-22 (syst) keV. We also measure the energy release in the decay and compute Delta m identical with m(D*(+))-m(D(0)) = 145.412+/-0.002 (stat)+/-0.012 (syst) MeV/c(2).
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Affiliation(s)
- S Ahmed
- State University of New York at Albany, Albany, New York 12222, USA
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Somwar R, Niu W, Kim DY, Sweeney G, Randhawa VK, Huang C, Ramlal T, Klip A. Differential effects of phosphatidylinositol 3-kinase inhibition on intracellular signals regulating GLUT4 translocation and glucose transport. J Biol Chem 2001; 276:46079-87. [PMID: 11598141 DOI: 10.1074/jbc.m109093200] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.1] [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: 11/06/2022] Open
Abstract
Phosphatidylinositol (PI) 3-kinase is required for insulin-stimulated translocation of GLUT4 to the surface of muscle and fat cells. Recent evidence suggests that the full stimulation of glucose uptake by insulin also requires activation of GLUT4, possibly via a p38 mitogen-activated protein kinase (p38 MAPK)-dependent pathway. Here we used L6 myotubes expressing Myc-tagged GLUT4 to examine at what level the signals regulating GLUT4 translocation and activation bifurcate. We compared the sensitivity of each process, as well as of signals leading to GLUT4 translocation (Akt and atypical protein kinase C) to PI 3-kinase inhibition. Wortmannin inhibited insulin-stimulated glucose uptake with an IC(50) of 3 nm. In contrast, GLUT4myc appearance at the cell surface was less sensitive to inhibition (IC(50) = 43 nm). This dissociation between insulin-stimulated glucose uptake and GLUT4myc translocation was not observed with LY294002 (IC(50) = 8 and 10 microm, respectively). The sensitivity of insulin-stimulated activation of PKC zeta/lambda, Akt1, Akt2, and Akt3 to wortmannin (IC(50) = 24, 30, 35, and 60 nm, respectively) correlated closely with inhibition of GLUT4 translocation. In contrast, insulin-dependent p38 MAPK phosphorylation was efficiently reduced in cells pretreated with wortmannin, with an IC(50) of 7 nm. Insulin-dependent p38 alpha and p38 beta MAPK activities were also markedly reduced by wortmannin (IC(50) = 6 and 2 nm, respectively). LY294002 or transient expression of a dominant inhibitory PI 3-kinase construct (Delta p85), however, did not affect p38 MAPK phosphorylation. These results uncover a striking correlation between PI 3-kinase, Akt, PKC zeta/lambda, and GLUT4 translocation on one hand and their segregation from glucose uptake and p38 MAPK activation on the other, based on their wortmannin sensitivity. We propose that a distinct, high affinity target of wortmannin, other than PI 3-kinase, may be necessary for activation of p38 MAPK and GLUT4 in response to insulin.
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Affiliation(s)
- R Somwar
- Programme in Cell Biology, Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada
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Viramontes BE, Kim DY, Camilleri M, Lee JS, Stephens D, Burton DD, Thomforde GM, Klein PD, Zinsmeister AR. Validation of a stable isotope gastric emptying test for normal, accelerated or delayed gastric emptying. Neurogastroenterol Motil 2001; 13:567-74. [PMID: 11903917 DOI: 10.1046/j.1365-2982.2001.00288.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
To validate a 13C-Spirulina platensis breath test for measurement of accelerated or delayed gastric emptying, we measured gastric emptying of egg containing 13C-S. platensis and 99mTc-sulphur colloid by breath 13 CO2 every 15 min over 3 h and scintigraphy every 15-30 min over 5 h in 57 healthy volunteers. Thirty-three received no treatment, 10 received erythromycin, and 14 atropine. A generalized linear regression model predicted half-emptying time by scintigraphy (t1/2S) from breath 13CO2 (t1/2B) data. Accuracy was assessed by standard deviation (SD) of differences between t1/2S and t1/2B and by receiver operating characteristic (ROC) curves. Regression models using breath samples at baseline, and 45, 90, 105 and 120 min, predicted t1/2B (mean +/- SD) at 118 +/- 59 min, similar to t1/2S (118 +/- 67 min). Correlation between t1/2B and t1/2S was significant (r=0.88; P < 0.0001). Differences between t1/2S and t1/2B were: 18-19.2 min for t1/2 < 70-150 min, and 68.3 min for t1/2 > 150 min. Breath test detected abnormal emptying with a sensitivity of 86% and specificity of 80%. Thus, the 13C-S. platensis test measures gastric emptying t1/2 for solids, which is accelerated or delayed to mimic a range of conditions from dumping syndrome to severe gastroparesis, with high sensitivity and specificity. Additional breath samples are needed to increase sensitivity in detecting accelerated gastric emptying.
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Affiliation(s)
- B E Viramontes
- Enteric Neuroscience Program, Gastroenterology Research Unit and Section of Biostatistics, Mayo Clinic and Mayo Foundation, Rochester, MN 55905, USA
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Liau SS, Camilleri M, Kim DY, Stephens D, Burton DD, O'Connor MK. Pharmacological modulation of human gastric volumes demonstrated noninvasively using SPECT imaging. Neurogastroenterol Motil 2001; 13:533-42. [PMID: 11903914 DOI: 10.1046/j.1365-2982.2001.00287.x] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Three-dimensional single-photon emission computed tomography (SPECT) imaging allows noninvasive measurement of human postprandial gastric accommodation. The aim of this study was to determine whether 99mTCO4-SPECT demonstrates effects on pre- and postprandial gastric volumes of intravenous (i.v.) erythromycin lactobionate and sublingual isosorbide dinitrate, as predicted from previous literature. Twenty volunteers received no medication (controls), while 12 were randomized to either i.v. erythromycin 2 mg kg-1 over 20 min, or 10 mg sublingual isosorbide. After a 10-min preprandial SPECT measurement, a standard 300-mL, 300-kcal liquid meal was ingested, followed by a 20-min postprandial measurement. Gastric images were reconstructed from transaxial images and total volume was measured using the Analyseeth software system. Fasting gastric volume was greater with isosorbide [223 +/- 14 (SE) mL vs. 174 +/- 9 mL, control; P < 0.05], and postprandial volume was lower with erythromycin [393 +/- 27 mL vs. 582 +/- 17 mL, control; P < 0.05]. The ratio of postprandial over fasting volume and mean difference between pre- and postprandial volumes were significantly lower in both drug groups compared to controls. We conclude that 99mTCO4-SPECT imaging is able to semiquantitatively demonstrate pharmacological modulation of fasting gastric volume and postprandial accommodation in humans.
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Affiliation(s)
- S S Liau
- Enteric Neuroscience Program, Gastroenterology Research Unit, Mayo Clinic and Mayo Foundation, Rochester, MN 55905, USA
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249
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Abstract
Although histone deacetylases (HDACs) appear to play a crucial role in carcinogenesis, the expression status of HDACs in primary human cancer tissues has not yet been reported. In this study, we investigated the expression level of HDAC1 in 25 paired primary human gastric cancer (GC) tissues and corresponding normal tissues through semi-quantitative RT-PCR and immunoblot analysis. The HDAC1 expression pattern was also topologically examined through immunohistochemistry. Overexpression of HDAC1 mRNA was detected in 68% of GC tissues (17 of 25), and the relative density of HDAC1 mRNA in GC tissue was increased 1.8-fold versus the normal counterpart (P < 0.01). Elevated expression of HDAC1 protein was also detected in 61% of GC samples (11 of 18), which also showed an increased mRNA level of HDAC. Immunohistochemically, overexpression of HDAC1 was predominantly localized in the nuclei of most neoplastic cells, including embolic tumor cells, whereas normal glandular epithelial cells revealed only weak HDAC1 expression that was focal in distribution. Thus, the present study clearly demonstrates that HDAC1 is overexpressed in GC and probably plays a significant role in gastric carcinogenesis.
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Affiliation(s)
- J H Choi
- Department of Veterinary Pathology, College of Veterinary Medicine and Agricultural Biotechnology, Seoul National University, Suwon, 441-744, Japan
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250
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Stegall MD, Kim DY, Prieto M, Cohen AJ, Griffin MD, Schwab TR, Nyberg SL, Velosa JA, Gloor JM, Innocenti F, Bohorquez H, Dean PG, Carpenter HA, Leontovich ON, Sterioff S, Larson TS. Thymoglobulin induction decreases rejection in solitary pancreas transplantation. Transplantation 2001; 72:1671-5. [PMID: 11726830 DOI: 10.1097/00007890-200111270-00017] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [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: 11/26/2022]
Abstract
BACKGROUND Solitary pancreas transplants, both pancreas transplant alone (PTA) and pancreas after kidney (PAK), have higher rejection rates and lower graft survivals than simultaneous pancreas-kidney transplants (SPK). The aim of this study is to compare three different antibody induction regimens in solitary pancreas transplant recipients and to assess the role of surveillance pancreas biopsies in the management of these patients. METHODS Solitary pancreas transplant recipients between 01/98 to 02/00 (n=29) received induction with either daclizumab (1 mg/kg on day 0, 7, 14), OKT 3 (5 mg/day x0-7), or thymoglobulin (1.5 mg/kg/day x0-10). Maintenance immunosuppression was similar for the three groups. All rejections were biopsy-proven either by surveillance/protocol or when clinically indicated. RESULTS The 1-year graft survival was 89.3% overall and 91.7% in the thymoglobulin group. Thymoglobulin significantly decreased rejection in the first 6 months when compared with OKT3 or daclizumab (7.7 vs. 60 vs. 50%). Acute rejections were seen on surveillance biopsies in the absence of biochemical abnormalities in 40% of patients. CONCLUSIONS Thymoglobulin induction regimen led to a low incidence of acute rejection and a high rate of graft survival in solitary pancreas transplants. In addition, surveillance biopsies were useful in the detection of early acute rejection in the absence of biochemical abnormalities.
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Affiliation(s)
- M D Stegall
- Division of Transplantation Surgery, Mayo Foundation and Clinic, 200 First Street, S.W., Rochester, MN 55905, USA
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