Myocardial hydroxyproline reduced by early administration of methylprednisolone or ibuprofen to rabbits with radiation-induced heart disease

Journal Article · Sat May 01 00:00:00 EDT 1982 · Circulation; (United States)

DOI:https://doi.org/10.1161/01.CIR.65.5.924· OSTI ID:5173387

Reeves, W C; Cunningham, D; Schwiter, E J; Abt, A; Skarlatos, S; Wood, M A; Whitesell, L

The ability of methylprednisolone (MP) and ibuprofen (IB) to reduce the severity of the late state of radiation-induced heart disease was assessed in 57 New Zealand white rabbits. Before and shortly after cardiac irradiation, 15 rabbits received i.v. MP, 30 mg/kg twice daily for 3 days, and 15 others received IB, 12.5 mg/kg twice daily for 2 days. No drug administered to 14 irradiated rabbits, and neither irradiation nor drugs were administered to 13 rabbits that served as controls. All 15 rabbits treated with MP and 13 of the 15 treated with IB lived for 100 days. Only seven of the untreated, irradiated rabbits lived that long. Longevity of each treated group of rabbits was better (p < 0.01 and 0.05) than that of the untreated, irradiated rabbits. Surviving rabbits were killed 100 days after irradiation. Pericarditis (p < 0.05) and pericardial effusion (p < 0.01) were less frequent in the treated, irradiated groups than in the untreated, irradiated rabbits. At least some rabbits in each irradiated group had microscopic evidence of myocardial fibrosis. The fibrosis was quantitated by determination of myocardial hydroxyproline concentrations (MHP). MHP concentration in the untreated, irradiated rabbits was greater than in those treated with MP (p < 0.05) or IB (p < 0.01) and in the untreated, unirradiated rabbits (p < 0.01). Early administrative of MP or IB retarded the development of myocardial fibrosis, pericarditis and pericardial effusin, and improved survival in this experimental model of radiation-induced heart disease.

• Research Organization: Pennsylvanian State Univ., University Park
• OSTI ID: 5173387
• Journal Information: Circulation; (United States), Vol. 65:5
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANTIPYRETICS
RADIOSENSITIVITY EFFECTS
FIBROSIS
RADIOINDUCTION
GLUCOCORTICOIDS
HEART
DELAYED RADIATION EFFECTS
INFLAMMATION
HYDROXYPROLINE
MYOCARDIUM
RABBITS
ADRENAL HORMONES
AMINES
AMINO ACIDS
ANIMALS
AZOLES
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
BODY
CARBOXYLIC ACIDS
CARDIOVASCULAR SYSTEM
CENTRAL NERVOUS SYSTEM DEPRESSANTS
CORTICOSTEROIDS
DRUGS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HORMONES
HYDROXY ACIDS
HYDROXY COMPOUNDS
KETONES
MAMMALS
MUSCLES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANS
PATHOLOGICAL CHANGES
PREGNANES
PYRROLES
PYRROLIDINES
RADIATION EFFECTS
STEROID HORMONES
STEROIDS
SYMPTOMS
VERTEBRATES
560152* - Radiation Effects on Animals- Animals