- Comparison of Ga-67, Tl-201 and Tc-99m MIBI Imaging in Lymphoma Patients.
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Kyung Ah Chun, Ihn Ho Cho, Kyu Chang Won, Kyung Hee Lee, Hyung Woo Lee, Myung Soo Hyun, Jae Tae Lee, Kyu Bo Lee
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Yeungnam Univ J Med. 2002;19(2):107-115. Published online December 31, 2002
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DOI: https://doi.org/10.12701/yujm.2002.19.2.107
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- PURPOSE: Ga-67 scintigraphy has been used for the evaluation of tumors, especially lymphoma. Recently, Tl-201 and Tc-99m MIBI were also used to tumor imaging. Tl-201 and Tc-99m MIBI had better physiologic characteristics than Ga-67, so we studied 32 biopsy proven lymphoma patients (male 24, female 8, mean age 46 years) with Ga-67, Tl-201 or Tc-99m MIBI and compared the scan findings. MATERIALS AND METHODS: Twenty-three of 32 patients were injected 74-111 MBq (2-3 mCi) of Tl-201, before chemotherapy and imaged with dual-headed SPECT (Prism 2000, Picker, USA) at 30 minutes after injection. Delayed images were obtained after 3 hr in 8 patients. Twenty seven of 32 patients were injected 740 MBq (20 mCi) of Tc-99m MIBI and imaged at 30 minutes after injection. 111-185 MBq (3-5 mCi) of Ga-67 was injected in 12 patients and imaged at 48 and 72 hours after injection. Twenty eight patients were diagnosed as non-Hodgkin's lymphoma and others were Hodgkin's lymphoma. RESULTS: Twenty patients were positive on Tl-201 scan and 3 patients showed negative findings. One of these 3 patients, Tc-99m MIBI and Ga-67 scan were positive. Twenty two patients were positive on Tc-99m MIBI scan and 5 patients showed negative findings. One of these 5 patients, Tl-201 was positive and 2 were positive on Ga-67 scan. Ten of 12 patients showed positive findings on Ga-67 scan. The sensitivity of these agents were 83.3%, 87.0% and 81.5% for Ga-67, Tl-201 and Tc-99m MIBI, respectively. The sensitivity was highest in Tl-201 scan, but there were no significant differences among three tests. In this study, there was no significant difference of uptake ratios between early and delayed images of Tl-201. CONCLUSION: Scintigraphy with Tl-201 and Tc-99m MIBI in lymphoma patients have similar sensitivity with Ga-67.
- Purification of Inositol Triphosphate Kinase from Bovine Brain
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Hung Hye Kim, Jae Tae Lee
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Yeungnam Univ J Med. 1996;13(1):46-58. Published online June 30, 1996
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DOI: https://doi.org/10.12701/yujm.1996.13.1.46
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Abstract
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- Inositol 1,4,5-triphosphate (InsP3) is a second messenger for obilizing intracellular Ca2+. It can be dephosphorylated by soluble and particulate forms on InsP3 5-phosphatase, or phosphorylated to produce inositol 1,3,4,5-tetrakisphosphate (InsP3) by InsP3 3-kinase. These enzymes represent possible targets for the regulation of the InsP3/AnsP4 signal. InsP3 3-kinase which catalyses the ATP-dependent phosphorylation of InsP3 was purified from bovine brain tissue. All operation were carried out at 41°C. Fresh tissue was homogenized and centrifuged. The supernatant was pooled. Proteins were precipitated from 10% polyethylene glycol, and suspended solution was applied to DEAE cellulose column for chromatography. As the result of above procedure, two isozymes of InsP3 3-kinase, I and U were obtained. Each isozyme was applied to Matriz green gel, Calmodulin-Affigel 15 column and subsequent phenyl-TSK HPLC column. Specific activites (SA) and fold of puriety were observed at each purification step of chromatography. At DEAE cellulose chromatography, SA were I, 0.6 and II, 4.8 nM/min/mg, and folds were I, 17.2 and II, 16.6. At Matrix green gel chromatography, SA were I, 18 and II, 11 nM/min/mg, folds were I, 62.1 and II, 38.0. At calmodulin-Affigel 15 column chromatography, SA were I, 19 and II, 13 nM/min/mg, folds were I, 65.5 and II, 44.8. Finally InsP3 kinase I and II were purified 3,103-fold and 2,310-fold, and SA were I, 900 and II, 670 nM/min/mg, respectively. SDS-polyacrylamide gel electrophoresis elucidated 3 distinct fractions of Mr of 145,000, 85,000 and 69,500 from isozyme I, and 2 distinct fractions of Mr of 79,000 and 57,000 from isozyme II.
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Yeungnam University College of Medicine
