Phenotypic alterations in Kaposi's sarcoma cells by antisense reduction of perlecan

Chiara Marchisone, Federica Del Grosso, Luciana Masiello, Maria Prat, Leonardo Santi, Douglas M Noonan

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Metastasis is a sequence of events including proliferation, migration, adhesion, invasion and subsequent metastatic growth of tumour cells in distant organs. We previously showed that highly metastatic variants of murine melanoma cells express higher levels of the basement membrane proteoglycan perlecan than low or non metastatic variants and expression of an antisense perlecan can reduce metastatic potential. In contrast, antisense expression of perlecan in fibrosarcoma cells was reported to enhance tumorigenesis. To better understand the role of perlecan in angiogenesis we have transfected KS-IMM, an immortalized cell line derived from a human Kaposi's sarcoma, with an antisense perlecan construct and investigated the positive/negative role of perlecan in KS. KS-IMM cells were transfected with either empty vector (neo) or the antisense perlecan construct and clones were isolated. Immunoblot analysis showed a reduction of Perlecan levels in two (AP3 and AP4) isolated clones, in Northern blot analysis endogenous perlecan was undetectable in the AP3 and AP4 clones, while it was present in the neo control clones. AP clones had a reduced migration to HGF in Boyden chambers as compared to neo clones. Proliferation in low serum or serum-free conditions was strongly reduced in the AP clones as compared to the neo control cells. The neotransfected cells showed rapid proliferation in low serum supplemented with HGF and VEGF, while antisense transfected clones showed little response. Finally, AP-transfected KS-IMM cells had significantly reduced migration to VEGF and HGF with respect to controls. In contrast, when the AP transfected cells were injected in nude mice they paradoxically showed enhanced tumor growth as compared to controls. Our preliminary data indicate that perlecan reduction plays a crucial role on Kaposi's sarcoma cell migration and proliferation in vitro. However, in vivo KS-IMM depleted of perlecan had a growth advantage. A possible hypothesis is that perlecan is necessary for growth of KS-IMM cells in vitro, however its down-regulation might promote angiogenesis through increased angiogenic growth factor diffusion, resulting in enhanced tumor growth in vivo.

Original languageEnglish
Pages (from-to)10-17
Number of pages8
JournalPathology and Oncology Research
Volume6
Issue number1
Publication statusPublished - 2000

Fingerprint

Kaposi's Sarcoma
Clone Cells
Growth
Vascular Endothelial Growth Factor A
perlecan
Serum
Neoplasms
Fibrosarcoma
Angiogenesis Inducing Agents
Proteoglycans
Basement Membrane
Nude Mice
Northern Blotting
Cell Movement
Melanoma
Intercellular Signaling Peptides and Proteins
Carcinogenesis
Down-Regulation
Cell Proliferation
Neoplasm Metastasis

Keywords

  • Antisense
  • Kaposi-sarcoma
  • Perlecan

ASJC Scopus subject areas

  • Cancer Research
  • Oncology
  • Pathology and Forensic Medicine

Cite this

Marchisone, C., Del Grosso, F., Masiello, L., Prat, M., Santi, L., & M Noonan, D. (2000). Phenotypic alterations in Kaposi's sarcoma cells by antisense reduction of perlecan. Pathology and Oncology Research, 6(1), 10-17.

Phenotypic alterations in Kaposi's sarcoma cells by antisense reduction of perlecan. / Marchisone, Chiara; Del Grosso, Federica; Masiello, Luciana; Prat, Maria; Santi, Leonardo; M Noonan, Douglas.

In: Pathology and Oncology Research, Vol. 6, No. 1, 2000, p. 10-17.

Research output: Contribution to journalArticle

Marchisone, C, Del Grosso, F, Masiello, L, Prat, M, Santi, L & M Noonan, D 2000, 'Phenotypic alterations in Kaposi's sarcoma cells by antisense reduction of perlecan', Pathology and Oncology Research, vol. 6, no. 1, pp. 10-17.
Marchisone, Chiara ; Del Grosso, Federica ; Masiello, Luciana ; Prat, Maria ; Santi, Leonardo ; M Noonan, Douglas. / Phenotypic alterations in Kaposi's sarcoma cells by antisense reduction of perlecan. In: Pathology and Oncology Research. 2000 ; Vol. 6, No. 1. pp. 10-17.
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