title: Comparison of the uptake and clearance of Tc-99m MIBI, Tl-201 and Ga-67 in drug-resistant lymphoma cell lines.
abstract: Tc-99m sestamibi (MIBI) has been used as a tumor-seeking agent. However, its role in detecting lymphomas has not been widely investigated. The aim of the present study was to determine the uptake and clearance characteristics of Tc-99m MIBI in vincristine-resistant lymphoma cell lines. In addition, thallium-201 (Tl-201) and gallium-67 (Ga-67) uptake and clearance characteristics were evaluated for comparison with Tc-99m MIBI. Drug-resistant lymphoma cell lines (monocyte-like, histiocytic lymphoma, human; B-lymphoma cell line, American Burkitt lymphoma, lymphoblastoid, human; Hodgkin's disease, lymphoid, human) were selected by multistep vincristine treatment up to 50 nM. After incubation of the radiotracers, Tc-99m MIBI, Tl-201 and Ga-67, in medium for 0, 10, 20, 30, 60 or 120 min, the uptake and clearance of each radiotracer were measured in the drug-resistant lymphoma cell lines. In addition, P-glycoprotein expression was determined by immunohistochemical study. In a comparison of the three radiotracers, the uptake of Tc-99m MIBI was the greatest in the studied wild-type lymphoma cell lines. Tc-99m MIBI uptake was much lower in drug-resistant tumor cell lines than in non-resistant cell lines. On the other hand, the uptake characteristics of Tl-201 did not differ between drug-resistant and non-resistant cells. Immunohistochemistry analyses of Ab-1 or JSB indicated that tumor cells expressed MDR-1 protein in all three cell lines. Tc-99m MIBI is a good radiotracer for detecting drug resistance in lymphoma cell lines.
authors.affiliation: Department of Nuclear Medicine, Show-Chwan Memorial Hospital, Chunghua, Taiwan.
authors.forename: S C
authors.initials: SC
authors.lastname: Tsai
authors.forename: Y C
authors.initials: YC
authors.lastname: Shiau
authors.forename: J J
authors.initials: JJ
authors.lastname: Wang
authors.forename: Y J
authors.initials: YJ
authors.lastname: Ho
authors.forename: C H
authors.initials: CH
authors.lastname: Kao
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000096:biosynthesis / Q000378:metabolism; D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology; D002051:Burkitt Lymphoma / Q000378:metabolism; D019008:Drug Resistance, Neoplasm; D005710:Gallium Radioisotopes / Q000493:pharmacokinetics*; D006689:Hodgkin Disease / Q000378:metabolism; D006801:Humans; D008223:Lymphoma / Q000378:metabolism*; D019275:Radiopharmaceuticals / Q000493:pharmacokinetics*; D017256:Technetium Tc 99m Sestamibi / Q000493:pharmacokinetics*; D013794:Thallium Radioisotopes / Q000493:pharmacokinetics*; D014407:Tumor Cells, Cultured; D020298:U937 Cells; D014750:Vincristine / Q000494:pharmacology
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000972:Antineoplastic Agents, Phytogenic; D005710:Gallium Radioisotopes; D019275:Radiopharmaceuticals; D013794:Thallium Radioisotopes; D014750:Vincristine; D017256:Technetium Tc 99m Sestamibi