Establishment of an embryonic cell line from the American cockroach Periplaneta americana (Blattaria: Blattidae) and a preliminary study of telomerase activity changes during the culturing process

Despite the pest status and medicinal value of the American cockroach Periplaneta americana, few attempts have been made to establish cell lines from this insect owing to the difficulty of culturing Blattarian cells. Here, we describe the establishment of the RIRI-PA1 line from P. americana embryo t...

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Bibliographic Details
Published in:In vitro cellular & developmental biology. Animal 2018-02, Vol.54 (2), p.129-135
Main Authors: Zhang, Xin, Feng, Ying, Ding, Wei-Feng, Li, Xian, Xie, Si-Cong
Format: Article
Language:English
Subjects:
Animal Genetics and Genomics
Antimicrobial agents
Bacteria
Biomedical and Life Sciences
Cancer
Cell Biology
Cell Culture
CELL GROWTH/DIFFERENTIATION/APOPTOSIS
Cell lines
Cell proliferation
Chinese medicine
Chromosome number
Chromosomes
COI protein
Developmental Biology
Embryos
Giant cells
Insects
Life Sciences
Periplaneta americana
Pest status
Regulatory mechanisms (biology)
Stagnation
Stem Cells
Studies
Telomerase
Tissue culture
Tissues
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Summary:Despite the pest status and medicinal value of the American cockroach Periplaneta americana, few attempts have been made to establish cell lines from this insect owing to the difficulty of culturing Blattarian cells. Here, we describe the establishment of the RIRI-PA1 line from P. americana embryo tissue following primary culture in modified Grace's medium containing 20% fetal bovine serum. RIRI-PA1 was found to primarily consist of attached spindle-shaped and giant cells, which attach themselves to their container. The population-doubling time of 40th-passage cells was approximately 84.8 h. The average chromosome number at the 30th passage was 42, with 40% of cells demonstrating substantial variations, with the highest number of variations of 78 and lowest of 24. The identity of RIRI-PA1 was confirmed by comparing the COI gene of these cells to that of P. americana embryo tissue. Telomerase activity decreased in primary cells after 7 d of culture and 5th-passage cells in comparison to embryo tissues; however, compared to the other cultured cells tested, the telomerase activity significantly increased at the 20th passage. We propose that the stagnation periods and cessation of proliferation observed relate to cellular telomerase activity, but the relationship between insect cell proliferation and telomerase as well as the regulatory mechanism involved remains to be elucidated.
ISSN:1071-2690
1543-706X
DOI:10.1007/s11626-017-0223-5