Antitumor activity of endostatin against carcinogen-induced rat primary mammary tumors.
Endostatin, a Mr 20,000 fragment of collagen XVIII, potently inhibits the growth of experimental tumors implanted in mice. Here we report the cloning, expression, and antitumor activity of the rat form of endostatin. When tested on breast carcinomas arising in female virgin rats after intragastric administration of 9,10-dimethyl-1,2-benzanthracene (DMBA), endostatin induced significant inhibition of mammary tumor growth in all of the treated rats during a 4-week treatment period without signs of systemic toxicity. Interestingly, this arrest of tumor growth persisted throughout a four-week off-therapy period. Moreover, endostatin was effective in counteracting the development of multiple primary tumors. These results confirm that rat endostatin is a potent anticancer agent in a carcinogen-induced, spontaneously arising rat breast cancer model. It not only stops the growth of existing tumors but also decreases the incidence of the development of multiple neoplastic lesions.
Perletti
G
G
Dipartimento di Biologia Strutturale e Funzionale, Università degli Studi dell'Insubria, Varese, Italy.
Concari
P
P
Giardini
R
R
Marras
E
E
Piccinini
F
F
Folkman
J
J
Chen
L
L
D015127:9,10-Dimethyl-1,2-benzanthracene; D000595:Amino Acid Sequence; D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000627:therapeutic use*; D001483:Base Sequence; D002273:Carcinogens; D003094:Collagen / Q000737:chemistry / Q000235:genetics* / Q000627:therapeutic use*; D043170:Collagen Type XVIII; D043169:Endostatins; D005260:Female; D006801:Humans; D008325:Mammary Neoplasms, Experimental / Q000139:chemically induced / Q000188:drug therapy* / Q000473:pathology; D051379:Mice; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000737:chemistry / Q000235:genetics* / Q000627:therapeutic use*; D051381:Rats; D017207:Rats, Sprague-Dawley; D011994:Recombinant Proteins / Q000737:chemistry / Q000627:therapeutic use; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
D000970:Antineoplastic Agents; D002273:Carcinogens; D043170:Collagen Type XVIII; D043169:Endostatins; D010446:Peptide Fragments; D011994:Recombinant Proteins; D015127:9,10-Dimethyl-1,2-benzanthracene; D003094:Collagen