Potentiation of radiation-induced cell kill by synthetic metalloporphyrins

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Int. J. Radiat. Oncol., Biol. Phys.; (United States)

DOI:https://doi.org/10.1016/0360-3016(89)90913-9· OSTI ID:6069151

O'Hara, J A; Douple, E B; Abrams, M J; Picker, D J; Giandomenico, C M; Vollano, J F

The effects of the combination of several meso-substituted, water soluble metalloporphyrins with ionizing radiation on hypoxic and oxic monolayers of Chinese hamster fibroblast (V79N) cells were studied. The metalloporphyrins tested included a series of cationic metalloporphyrins complexed with Co(III), Zn(II), Fe(III), Cu(II), Pd(II) or Mn(III) and a series of anionic porphyrins chelated with Co(III), Fe(III), Cu(II), Rh(III), Mn(III) or Sn(IV). Both cationic and anionic free porphyrins were also tested. Cationic ligands were tetrakis(4N-methylpyridyl)porphine (TMPyP), tetrakis(4N-trimethylamino phenyl)porphine (TMAP), tetrakis(4N-butylpyridyl)porphine (TBPyP) and tetrakis(3N-methylpyridyl)porphine (3TMPyP). Anionic ligands tested were tetrakis(4-sulfonato phenyl)porphine (TPPS), tetrakis(biphenyl)porphine sulfonate (TBPS) and tetrakis(4-carboxyphenyl)porphine (TCPP). SER calculated from survival curves and SFR from one radiation dose were used to assess the relative effectiveness of this class as non-cytotoxic hypoxic and oxic cell-kill potentiators. Comparisons were made at 100 microM, which was essentially non-toxic (greater than 70% survival) for all porphyrins tested except for Co(TMPyP) (approximately 50% survival after 1 hour at 37 degrees C under oxic conditions). The greatest effects on radiation-induced cell kill were achieved with Co(TPPS) and Co(TMPyP) with SER values of 2.3 and 2.4 respectively. Porphyrin analogs with no coordinated metal were found to be less active than the same compound with metal. The overall charge on the molecule did not systematically relate to the biological activity of the compounds tested.

• Research Organization: Dartmouth-Hitchcock Medical Center, Hanover, NH (USA)
• OSTI ID: 6069151
• Journal Information: Int. J. Radiat. Oncol., Biol. Phys.; (United States), Journal Name: Int. J. Radiat. Oncol., Biol. Phys.; (United States) Vol. 16:4; ISSN IOBPD
• Country of Publication: United States
• Language: English

Related Subjects

560120* -- Radiation Effects on Biochemicals
Cells
& Tissue Culture
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMAL CELLS
ANIMALS
CARBOXYLIC ACIDS
CELL KILLING
CONNECTIVE TISSUE CELLS
DOSES
ELEMENTS
FIBROBLASTS
HAMSTERS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
IONIZING RADIATIONS
LIGANDS
MAMMALS
METALLOPROTEINS
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN
PORPHYRINS
PROTEINS
RADIATION DOSES
RADIATIONS
RADIOSENSITIVITY EFFECTS
RODENTS
SOMATIC CELLS
SURVIVAL CURVES
SYNERGISM
VERTEBRATES