Our studies are based upon the previous isolation and partial purification of thymosin fraction 5, a family of polypeptides isolated from calf thymus, and the demonstration that these polypeptides can partially or fully reconstitute immune function in thymic-deprived animals and in humans with a number of primary immunodeficiency diseases or cancer. Of major potential importance to the goals of the National Cancer Program in the cancer treatment area is the recent completion of the first Phase II randomized trials, conducted by Dr. Richard Schulof here at The George Washington University Medical Center, showing that synthetic thymosin alpha?l?, when given in conjunction with radiotherapy of the lung, significantly prolonged the disease-free interval and resulted in early immune reconstitution. This is the first successful prospective-randomized trial of immunotherapy in lung cancer using a synthetic thymic hormone. Two Phase III confirmatory trials by RTOG and MAOP are currently underway with thymosin alpha 1. Our research has the following overall objectives: (1) to continue the chemical characterization, including amino acid sequence analysis, of the biologically active peptide components of thymosin that have immunoreconstitutive or immunoregulatory effects; (2) to develop and standardize large-scale procedures for the production of the biologically active peptides in thymosin adequate for human use; (3) to develop functional radioimmunoassays for the biologically active thymosin peptides; and (4) to determine in relevant in vitro and in vivo animal models the efficacy of these peptides in alleviating specific immunological defects. (HF)

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
5R01CA024974-08
Application #
3166617
Study Section
Experimental Immunology Study Section (EI)
Project Start
1979-01-01
Project End
1986-12-31
Budget Start
1986-01-01
Budget End
1986-12-31
Support Year
8
Fiscal Year
1986
Total Cost
Indirect Cost
Name
George Washington University
Department
Type
Schools of Medicine
DUNS #
City
Washington
State
DC
Country
United States
Zip Code
20052
Badamchian, M; Spangelo, B L; Damavandy, T et al. (1991) Complete amino acid sequence analysis of a peptide isolated from the thymus that enhances release of growth hormone and prolactin. Endocrinology 128:1580-8
Tryphonas, H; Luster, M I; White Jr, K L et al. (1991) Effects of PCB (Aroclor 1254) on non-specific immune parameters in rhesus (Macaca mulatta) monkeys. Int J Immunopharmacol 13:639-48
Hsia, J; Goldstein, A L; Simon, G L et al. (1990) Peripheral blood mononuclear cell interleukin-2 and interferon-gamma production, cytotoxicity, and antigen-stimulated blastogenesis during experimental rhinovirus infection. J Infect Dis 162:591-7
Goya, R G; Naylor, P H; Goldstein, A L et al. (1990) Changes in circulating levels of neuroendocrine and thymic hormones during aging in rats: a correlation study. Exp Gerontol 25:149-57
Hall, N R; O'Grady, M; Goldstein, A L et al. (1989) Regulation of pituitary hormones by thymosins and other immune system products. Immunol Ser 45:469-77
Tzehoval, E; Sztein, M B; Goldstein, A L (1989) Thymosins alpha 1 and beta 4 potentiate the antigen-presenting capacity of macrophages. Immunopharmacology 18:107-13
Hu, S K; Badamchian, M; Mitcho, Y L et al. (1989) Thymosin enhances the production of IL-1 alpha by human peripheral blood monocytes. Lymphokine Res 8:203-14
Favalli, C; Mastino, A; Jezzi, T et al. (1989) Synergistic effect of thymosin alpha 1 and alpha beta-interferon on NK activity in tumor-bearing mice. Int J Immunopharmacol 11:443-50
Hsia, J; Sztein, M B; Naylor, P H et al. (1989) Modulation of thymosin alpha 1 and thymosin beta 4 levels and peripheral blood mononuclear cell subsets during experimental rhinovirus colds. Lymphokine Res 8:383-91
Hsia, J; Sarin, N; Oliver, J H et al. (1989) Aspirin and thymosin increase interleukin-2 and interferon-gamma production by human peripheral blood lymphocytes. Immunopharmacology 17:167-73

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