Summary
Transforming growth factor-α-Pseudomonas exotoxin-40 (TP40) is a recombinant fusion protein. TP40 consists of the entire human transforming growth factor-α (TGFα) protein fused to a 40,000 Da. segment of thePseudomonas exotoxin A protein. TP40 is a bifunctional molecule that possesses the epidermal growth factor (EGF) receptor binding properties of TGFα and the cell killing properties ofPseudomonas exotoxin A. These properties make TP40 a selective cytotoxic agent that kills EGF receptor bearing cells. TP40 has been shown to effectively kill human tumor cell lines that possess EGF receptorsin vitro and in nude mice. In the present study, TP40 was tested against tumors taken directly from patients and grown in a soft agar human tumor cloning system. A total of 107 patients' tumors (taken from patients with tumors refractory to chemotherapy) were tested with a continuous exposure to 0.5–50 nM concentrations of the agent. TP40 exhibited a clear dose response effect against a wide variety of human solid tumor colony-forming units with ≥ 84% of evaluable tumors responding at a drug concentration ≥ 24 nM. When used as a continuous exposure, concentrations of TP40 as low as 5 nM demonstrated substantialin vitro activity. This activity included cytotoxicity against breast, colorectal, endometrial, head and neck, non small-cell lung, gastric, sarcoma, and pancreatic cancer tumor colony-forming units. Additionalin vivo testing of this compound is warranted.
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Abbreviations
- TP40:
-
recombinant transforming growth factor-α-PE40 toxin hybrid protein
- HTCA:
-
human tumor cloning assay
- TFG-α :
-
transforming growth factor-α
- EGF:
-
epidermal growth factor
- PBS:
-
phosphate buffered saline
References
Todaro GJ, Fryling C, De Larco JE: Transforming growth factors produced by certain human tumor cells: Polypeptides that interact with epidermal growth factor receptors. Proc Natl Acad Sci USA 77:5258–5262, 1980
Marquardt H, Hunkapiller MW, Hood LE, Twardzik DR, De Larco JE, Stephenson JR, Todaro GJ: Transforming growth factors produced by retrovirus-transformed rodent fibroblasts and human melanoma cells: Amino acid sequence with epidermal growth factor. Proc Natl Acad Sci USA 80:4684–4688, 1983
Roberts AB, Frolik CA, Anzano MA, Sporn MB: Transforming growth factors from neoplastic and non-neoplastic tissues. Fed Proc 42:2621–2626, 1983
Roberts AB, Sporn MB: Transforming growth factors. Cancer Sruv 4:683–705, 1985
Marquardt H, Hunkapiller MW, Hood LE, Todaro GJ: Rat transforming growth factor type 1: Structure and relation to epidermal growth factor. Science 223:1079–1082, 1984
Ro J, North SM, Gallick GE, Hortobagyi GN, Gutterman JU, Blick M: Amplified and overexpressed epidermal growth factor receptor gene in uncultured primary human breast carcinoma. Cancer Res 48:161–164, 1988
Liberman TA, Rason N, Bartal AD, Yarden Y, Schlessing J, Soreq H: Expression of epidermal growth factor receptors in human brain tumors. Cancer Res 44:753–760, 1984
Thompson DM, Gill GN: The EGF receptor: Structure, regulation and potential role in malignancy. Cancer Surv 4:767–788, 1985
Sporn MB, Todaro GJ: Autocrine secretion and malignant transformation of cells. N Engl J Med 303:878–880, 1980
Derynck R, Goeddel DV, Ullrich A, Gutterman JU, Williams RD, Bringman TS, Berger SH: Synthesis of messenger RNA species for transforming growth factors alpha and beta and the epidermal growth factor receptor by human tumors. Cancer Res 47:707–712, 1987
Hanauske AR, Hanauske U, Buchok J, Von Hoff DD: Recombinant human transforming growth factor-α stimulatesin vitro colony formation of fresh human tumor specimens. Int J Cell Cloning 6:221–229, 1988
Hanauske AR, Arteaga CL, Clark GM, Buchok J, Marshall M, Hazarike P, Pardue RL, Von Hoff DD: Determination of transforming growth factor activity in effusions from cancer patients. Cancer 61:1832–1837, 1988
Arteaga CL, Hanauske AR, Clark GM, Buchok J, Marshall M, Hazarika P, Pardue RL, Von Hoff DD: Immunoreactive of transforming growth factor activity in effusions from cancer patients as a marker of tumor burden and patient prognosis. Cancer 48:5023–5028, 1988
Chaudhary VK, FitzGerald DJ, Adhya S, Pastan I: Activity of a recombinant fusion protein between transforming growth factor type alpha and Pseudomonas toxin. Proc Natl Acad Sci USA 84:4538–4542, 1987
Siegall CB, Xu Y-H, Chaudhary VK, Adhya S, FitzGerald D, Pastan I: Cytotoxic activities of a fusion protein comprised of TGFα and Pseudomonas exotoxin. FASEB 3:2647–2652, 1989
Edwards GM, Defeo-Jones D, Tai JY, Vuocolo GA, Patrick DR, Heimbrook DC, Oliff A: Epidermal growth factor receptor binding is affected by structural determinants in the toxin domain of transforming growth factor-alpha-Pseudomonas exotoxin fusion proteins. Mol Cell Biol 9:2860–2867, 1989
Iglewski BH, Kabat D: NAD-dependent inhibition of protein synthesis byPseudomonas aeruginosa toxin. Proc Natl Acad Sci USA 72:2284–2288, 1975
Heimbrook DC, Stirdivant SM, Ahern JD, Bolishen NL, Patrick DR, Edwards GM, Jones DD, FitzGerald DJ, Pastan I, Oliff A: Transforming growth factor-a-Pseudomonas exotoxin fusion protein prolongs survival of nude mice bearing tumor xenografts. Proc Natl Acad Sci USA 87:4697–4701, 1990
Hamburger AW, Salmon SE: Primary bioassay of human tumor stem cells. Science 197:461–463, 1977
Hamburger A, Salmon SE: Primary bioassay of human myeloma stem cells. J Clin Invest 60:846–854, 1977
Salmon SE, Hamburger AW, Soehnlen B, Durie BG, Alberts DS, Moon TE: Quantitation of differential sensitivity of human tumor stem cells to anticancer drugs. N Engl J Med 298:1321–1327, 1978
Salmon SE, Alberts DS, Durie BGM, Meyskens FL, Jones SE, Soehnlen B, Chen H-SG, Moon T: Clinical correlations of drug sensitivity in the human tumor stem cell assay. Recent Results Cancer Res 74:300–305, 1980
Von Hoff DD, Casper J, Bradley E, Sundbach J, Jones DG, Makuch R: Association between human tumor colonyforming assay results and response of an individual patient's tumor to chemotherapy. Am J Med 70:1027–1041, 1981
Von Hoff DD, Clark GM, Stogdill BJ, Sorosdy MF, O'Brien MT, Casper JT, Mottox DE, Page CP, Cruz AB, Sandbach JF: Prospective clinical trial of a human tumor cloning system. Cancer Res 43:1926–1931, 1983
Shoemaker RH, Wolpert-DeFilippes MK, Kern DH, Lieber MM, Makuch RW, Melnick NR, Miller WT, Salmon SE, Simon RM, Venditte JM, Von Hoff DD: Application of a human tumor colony-forming assay to new drug screening. Cancer Res 45:2145–2153, 1985
Von Hoff DD, Foreseth BJ, Huong M, Buchok JB, Lathan B: Improved plating efficiencies for human tumors cloned in capillary tubes versus petri dishes. Cancer Res 46:4012–4017, 1986
Von Hoff DD, Sandbach JF, Clark GM, Turner J, Forseth B, Piccart MJ, Colombo N, Muggia FM: Selection of cancer chemotherapy for a patient by anin vitro assay versus a clinician. J Natl Cancer Inst 82:110–116, 1990
Von Hoff DD: He's not going to talk aboutin vitro predictive assays again, is he? J Natl Cancer Inst 82:96–101, 1990
Hamburger AW, Salmon SE, Kim MB, Trent J, Soehnlen BJ, Alberts DS, Schmidt HJ: Direct cloning of human ovarian carcinoma cells in agar. Cancer Res 38:3438–3444, 1978
Alberts DS, Chen HSB: Tabular summary of pharmacokinetic parameters relevant toin vitro drug assay. In: J. S. Salmon (ed.), Human Tumor Stem Cells, Alan R. Liss, Inc., New York, 1980, pp 351–359
Alberts DS, Salmon SE, Chen HS, Surwit EA, Soehnlen B, Young L, Moon TE:In vitro clonogenic assay for predicting response of ovarian cancer to chemotherapy. Lancet 2:340–342, 1980
Pike BL, Robinson WA: Human bone marrow colony growth in agar-gel. J Cell Physiol 76:77–84, 1970
Von Hoff DD:In vitro predictive testing: The sulfonamide era. Int J Cell Cloning 5:179–190, 1987
Von Hoff DD: Human tumor cloning assays: Applications in clinical oncology and new antineoplastic agent development. Cancer and Metastasis Review 7:357–371, 1988
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Von Hoff, D.D., Marshall, M.H., Heimbrook, D.C. et al. Activity of a recombinant transforming growth factor-α-Pseudomonas exotoxin hybrid protein against primary human tumor colony-forming units. Invest New Drugs 10, 17–22 (1992). https://doi.org/10.1007/BF01275472
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DOI: https://doi.org/10.1007/BF01275472