Authors: Sersale G.¹; Casotti V.²; Di Cicco M.³; Carpani D.²; Muggia A.²; Calori G.⁴; Assael B. M.⁵; Conese M.²

Source: Acta Oto-Laryngologica, Volume 121, Number 1, 1 January 2001 , pp. 76-82(7)

Publisher: Informa Healthcare

Abstract:

The influence of cell differentiation and proliferation on cationic vector mediated gene transfer into the explant-outgrowth cell culture from nasal polyps was investigated. Respiratory cells were categorized into two groups based on the expression of cytokeratin filaments (CKs), which were used as differentiation markers. Outgrowths grown for 2 weeks expressed similar levels of CKs 14, 13 and 18 showing a de-differentiated phenotype, while outgrowths cultured for 4 weeks presented very high levels of CK 13, high CK 14 and low CK 18 expression and were squamous differentiated. De-differentiated cells presented higher proliferation indexes than squamous cells. Gene transfer levels, as evaluated using a quantitative reporter gene (firefly luciferase), were significantly higher in the 2- than in the 4-week-old outgrowths. Cationic vector transfected respiratory cells were located both proximally and distally to the explant, as shown by enzymatic staining of -galactosidase-positive cells. Respiratory cell outgrowths from nasal polyps can be considered a suitable model to study gene transfer protocols in vitro.

Keywords: CATIONIC; LIPIDS; DIFFERENTIATION; IMMUNOCYTOCHEMISTRY; POLYMERS; PRIMARY; EPITHELIAL; AIRWAY; CELLS; PROLIFERATION; REPORTER; GENES

Language: English

Document Type: Research article

Affiliations: 1: Centro Regionale di Riferimento per la Fibrosi Cistica, Milano, Italy 2: Institute for Experimental Treatment of Cystic Fibrosis, San Raffaele Scientific Institute, Milano, Italy 3: II Clinica Otorinolaringoiatrica, University of Milano, Milano, Italy 4: Epidemiology Unit, San Raffaele Scientific Institute, Milano, Italy 5: Department of Pediatrics, University of Milano, Milano, Italy

Publication date: 2001-01-01

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