PMID- 8605732 OWN - NLM STAT- MEDLINE DCOM- 19960521 LR - 20191024 IS - 0262-0898 (Print) IS - 0262-0898 (Linking) VI - 14 IP - 2 DP - 1996 Mar TI - Invasion-inhibiting factor 2-albumin conjugate inhibits invasion and spontaneous metastasis of MKL-4 human breast cancer cells transplanted into female nude mice. PG - 87-94 AB - Invasion-inhibiting factor 2 (IIF-2) and its albumin conjugate have been reported to inhibit spontaneous metastasis of highly metastatic cancer cells with no effect on primary tumor growth. To confirm the inhibitory effects of the IIF-2 conjugate on tumor invasion and spontaneous metastasis, we administered the conjugate intra-peritoneally (i.p.) to female nude mice bearing transplanted tumors with MKL-4 cells, which are MCF-7 human breast cancer cells cotransfected with fibroblast growth factor 4 and lacZ. Neither 10 nor 20 mg/kg doses of the conjugate caused any inhibition of primary tumor growth, but 20 mg/kg significantly inhibited tumor invasion and spontaneous metastasis. Tumor invasion was measured by a novel computer-assisted image analysis. Spontaneous microscopic metastases into lymph nodes and distant organs were measured by whole organ staining for beta-galactosidase activity and observed with a dissecting microscope. The dose of 10 mg/kg significantly inhibited tumor invasion but not metastasis. Interestingly, the number of factor VIII-positive microvessels in the tumors was not reduced by treatment at either dose level. These findings suggest that the anti-invasive effect of the IIF-2 conjugate may reduce both lymphatic and hematogenous metastases in this MKL-4 metastasis model without affecting angiogenesis. FAU - Kurebayashi, J AU - Kurebayashi J AD - Department of Endocrine Surgery, Kawasaki Medical School, Okayama, Japan. FAU - Kurosumi, M AU - Kurosumi M FAU - Isoai, A AU - Isoai A FAU - Dickson, R B AU - Dickson RB FAU - Sonoo, H AU - Sonoo H LA - eng GR - 1 P30CA51008/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Clin Exp Metastasis JT - Clinical & experimental metastasis JID - 8409970 RN - 0 (Angiogenesis Inhibitors) RN - 0 (Proteins) RN - 0 (Serum Albumin) SB - IM MH - Angiogenesis Inhibitors MH - Animals MH - Breast Neoplasms/blood supply/*pathology MH - Cell Division MH - Humans MH - Lymphatic Metastasis MH - Mice MH - Mice, Nude MH - Neoplasm Invasiveness MH - Neoplasm Metastasis MH - Proteins/*administration & dosage MH - Serum Albumin/chemistry MH - Tumor Cells, Cultured EDAT- 1996/03/01 00:00 MHDA- 1996/03/01 00:01 CRDT- 1996/03/01 00:00 PHST- 1996/03/01 00:00 [pubmed] PHST- 1996/03/01 00:01 [medline] PHST- 1996/03/01 00:00 [entrez] AID - 10.1007/BF00121205 [doi] PST - ppublish SO - Clin Exp Metastasis. 1996 Mar;14(2):87-94. doi: 10.1007/BF00121205.