Establishment, growth kinetics, and susceptibility to AcMNPV of heat tolerant lepidopteran cell lines.

Abstract:

:Lepidopteran heat-tolerant (ht) cell lines have been obtained with sf-9, sf-21 and several Bombyx cells. They have a distinct karyotype, membrane lipid composition, morphology and growth kinetics from the parental cell lines. In this paper, we report the development of ht cell lines from other insect species and examination of their growth characteristics and virus susceptibility. Adaptation of cell lines sf-9, BTI-TN-5B1-4 (High5) and BTI-TN-MG1 (MG1) to 33°C and 35°C was carried out by shifting the culture temperature between 28°C and higher temperatures by a gradual stepwise increase in temperature. The process of adaption to a higher culture temperature was accomplished over a period of 2 months. The cell lines with the temperature adaption were designated as sf9-ht33, sf9-ht35, High5-ht33, High5-ht35, MG1-ht33, MG1-ht35. These cell lines have been subcultured over 70 passages. Adaption to high temperatures was confirmed by a constant population doubling time with individual cell lines. The population doubling time of heat adapted cell lines were 1-4 h less than these of parental cell lines. Cell shapes did not show obvious change, however, the cell size of sf9-ht cells was enlarged and those of High5 and MG1 ht cells were reduced after heat adaption. When the cell lines were infected with Autographa californica nuclear polyhedrosis virus (AcMNPV) at 28°C, 33°C, 35°C and 37°C, production of budded virus and occlusion bodies in each cell line was optimum at its own adapted temperature.

journal_name

Virol Sin

journal_title

Virologica Sinica

authors

Wu YL,Jiang L,Hashimoto Y,Granados RR,Li GX

doi

10.1007/s12250-011-3177-x

subject

Has Abstract

pub_date

2011-06-01 00:00:00

pages

198-205

issue

3

eissn

1674-0769

issn

1995-820X

journal_volume

26

pub_type

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