title: Technetium-labelled leucocytes using diethyldithiocarbamate: preliminary report on in vitro studies.
abstract: Diethyldithiocarbamate (DDC) forms a lipid soluble complex with 99Tcm-pertechnetate which is rapidly incorporated into leucocytes in vitro. In seven healthy volunteers, a 'crude' leucocyte suspension was obtained by sedimnetaion and centrifugation and incubated with 99Tcm-DDC complex. Labelling efficiency was found to be 73 +/- 14% (SD). The mean activity remaining on the cells after hourly incubations with plasma was 77 +/- 5%. Percoll-saline differential cell analysis showed that 69 +/- 3% of the activity was associated with the granulocytes, 12 +/- 4% with the lymphocytes/monocytes, 11 +/- 4% with the platelets and 8 +/- 1% with contaminating erythrocytes (n = 3). The mean labelling efficiency decreased by 14% when the leucocyte count was reduced from 42 X 10(6) to 21 X 10(6) cells. Over the range 21 X 10(6) to 5.2 X 10(6) cells there was no decrease in labelling efficiency.
authors.affiliation: Department of Nuclear Medicine, Addenbrooke's Hospital, Cambridge.
authors.forename: C B
authors.initials: CB
authors.lastname: Sampson
authors.forename: C
authors.initials: C
authors.lastname: Solanki
mesh_terms: D004050:Ditiocarb / Q000627:therapeutic use*; D006801:Humans; D066298:In Vitro Techniques; D007553:Isotope Labeling / Q000379:methods*; D007962:Leukocytes; D009942:Organometallic Compounds / Q000627:therapeutic use*; D015609:Organotechnetium Compounds; D013667:Technetium / Q000627:therapeutic use*
chemical_list: D009942:Organometallic Compounds; D015609:Organotechnetium Compounds; C034630:technetium Tc 99m diethyldithiocarbamate; D013667:Technetium; D004050:Ditiocarb