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. 1983 Sep;51:131–140. doi: 10.1289/ehp.8351131

An adherent cell perifusion technique to study the overall and sequential response of rat alveolar macrophages to toxic substances.

G Forget, M J Lacroix, A Cadieux, R Calvert, J H Grose, P Sirois
PMCID: PMC1569300  PMID: 6641651

Abstract

Essentially pure (97%) alveolar macrophages were isolated by bronchoalveolar lavage of rats with warm (37 degrees C) PBS solution. These cells were allowed to adhere to the inside walls of open-ended glass cylinders which were closed off at each end by three-way stopcocks. The adhering cells were perifused with RPMI-1640 medium supplemented with 5% fetal bovine serum for 18 hr at the rate of 1 mL/hr, and the effluent medium was collected automatically in 2-mL aliquots. Cell recoveries and viabilities did not differ from those found for Petri cultures treated similarly, indicating that the perifusion method under study offered an adequate milieu for short-term primary cultures. The alveolar macrophages in culture were subjected to the presence of particulate (chrysotile asbestos) and soluble (phorbol myristate) toxicants, and their response was monitored in the effluent medium by measuring the release of prostaglandins (PGE) by radioimmunoassay. A significant increase in the sequential release of PGE was observed in the presence of asbestos (100 micrograms/mL) or phorbol myristate (200 ng/mL). Treatment of the cells with indomethacin (20 microM) completely abolished the release of PGE stimulated with phorbol myristate. A cumulative response to the toxicants was also observed when cells were harvested manually from the chambers: asbestos caused a 2-fold increase in cell mortality relative to control, while phorbol myristate brought about a 3-fold increase in the number of dead cells. This effect was not prevented by the presence of indomethacin. Cell aggregation was also observed when cells were perifused in the presence of phorbol myristate, whether indomethacin was present or absent. Our results indicate that the cell perifusion system combines the advantages of conventional adherent cell cultures (viability, aggregation) with those of perifusion techniques (sequential metabolism studies).

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Selected References

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