title: Using technetium-99m-tetrofosmin scan to predict chemotherapy response of malignant lymphomas, compared with P-glycoprotein and multidrug resistance related protein expression.
abstract: The ability of technetium-99m tetrofosmin (Tc-TF) scan to predict chemotherapy response in malignant lymphomas (ML) was compared with the predictive ability of P-glycoprotein (Pgp) and multidrug resistance related protein (MRP) expression. Before chemotherapy, 25 ML patients were enrolled in this study. Scans were performed 10 min after intravenous injection of Tc-TF. Immunohistochemical analyses were performed on ML specimen sections to evaluate Pgp and MRP expression. Chemotherapy response was evaluated in the first 1-2 years after completion of chemotherapy. Based on Tc-TF scan results, the mean tumor-to-background (T/B) ratio of the 15 patients with good response (3.23 +/- 0.56) was significantly higher than that of the 10 patients with poor response (1.18 +/- 0.11). All 15 patients with good response had positive Tc-TF scan results but negative Pgp and MRP expression. All 10 patients with poor response had negative Tc-TF scan results but positive Pgp or MRP expression. No significant differences in the incidences of good and poor response results were found for patients with Hodgkin's disease versus non-Hodgkin's lymphoma, with stage I-II versus stage III-IV, with age > 40 versus age < or = 40 years, or with B symptoms versus without B symptoms. Tc-TF scan results, which may represent either Pgp or MRP expression, accurately predict chemotherapy response in patients with ML.
authors.affiliation: Department of Radiation Therapy and Oncology, China Medical College Hospital, Taichung, Taiwan, R.O.C.
authors.forename: Ji-An
authors.initials: JA
authors.lastname: Liang
authors.forename: Yu-Chien
authors.initials: YC
authors.lastname: Shiau
authors.forename: Shih-Neng
authors.initials: SN
authors.lastname: Yang
authors.forename: Fang-Jen
authors.initials: FJ
authors.lastname: Lin
authors.forename: Cheng-Chieh
authors.initials: CC
authors.lastname: Lin
authors.forename: Albert
authors.initials: A
authors.lastname: Kao
authors.forename: Cheng-Chun
authors.initials: CC
authors.lastname: Lee
mesh_terms: D018435:ATP Binding Cassette Transporter, Subfamily B / Q000378:metabolism*; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000378:metabolism*; D000328:Adult; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D003520:Cyclophosphamide / Q000627:therapeutic use*; D004317:Doxorubicin / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D008223:Lymphoma / Q000000981:diagnostic imaging* / Q000188:drug therapy / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D009943:Organophosphorus Compounds; D015609:Organotechnetium Compounds; D011237:Predictive Value of Tests; D011241:Prednisone / Q000627:therapeutic use*; D011379:Prognosis; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D016896:Treatment Outcome; D014750:Vincristine / Q000627:therapeutic use*
chemical_list: D018435:ATP Binding Cassette Transporter, Subfamily B; D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D009943:Organophosphorus Compounds; D015609:Organotechnetium Compounds; D019275:Radiopharmaceuticals; C078700:technetium tc-99m tetrofosmin; D014750:Vincristine; D004317:Doxorubicin; D003520:Cyclophosphamide; D011241:Prednisone