The effect of PGA1 on the immune response in B-16 melanoma-bearing mice.

Abstract

This study evaluated the effects of PGA1 on B-16 melanoma-bearing mice. Intraperitoneal injection of PGA1 (10 microgram/day) significantly inhibited the rate of melanoma growth measured both as delay in the rate of appearance and decrease in the tumor volume. In contrast to the diluent control-treated mice, by 17 days, less than half of the PGA1-treated animals developed measurable (greater than 2 mm) subcutaneous tumors. In addition to its effect on tumor size, PGA1 was also effective in stimulating both the humoral and cellular components of the immune response. B-16 tumor-bearing mice were shown to be immunosuppressed, in that they had decreased anti-sRBC hemagglutinin titers, decreased splenic plaque-forming cells, suppressed delayed hypersensitivity responses, and delayed rejection of skin allografts from BALB/c mice. Although, PGA1 had relatively little effect on normal mice, this prostaglandin substantially improved all these immunologic parameters in tumor-bearing animals.

• Authors: C Favalli, E Garaci, M G Santoro, L Santucci, B M Jaffe
• Journal: Prostaglandins (Prostaglandins) Vol. 19 Issue 4 Pg. 587-94 (Apr 1980) ISSN: 0090-6980 [Print] United States
• PMID: 6992232 (Publication Type: Comparative Study, Journal Article)

Chemical References

• Prostaglandins A

Topics

• Animals
• Female
• Graft Rejection (drug effects)
• Immunity (drug effects)
• Immunity, Cellular (drug effects)
• Melanoma (drug therapy, immunology)
• Mice
• Mice, Inbred BALB C
• Mice, Inbred C57BL
• Neoplasms, Experimental (drug therapy)
• Prostaglandins A (pharmacology)
• Skin Transplantation
• Transplantation, Homologous