Cell culture of insects

Definition

The maintenance and propagation of insect cells or tissues in vitro under controlled conditions, typically using nutrient media supplemented with growth factors, antibiotics, and often fetal bovine serum. Insect cell culture encompasses both primary cultures—derived directly from dissociated embryonic, larval, or imaginal tissues—and continuous cell lines that have undergone spontaneous or induced immortalization. The technique exploits the relatively permissive growth requirements of many insect cells and their ability to proliferate at ambient temperatures without CO₂ supplementation. Cell culture of insects serves as foundational infrastructure for virology (baculovirus expression systems), insecticide screening, developmental biology, and functional genomics, with the fall armyworm (Spodoptera frugiperda) Sf9 and cabbage looper (Trichoplusia ni) High Five lines being the most widely employed industrial platforms.

Etymology

Example

Researchers use Sf9 cell culture of insects to produce recombinant proteins via baculovirus vectors, exploiting the cells' high-density suspension growth and strong viral promoters to generate milligram quantities of eukaryotic proteins for structural biology.

Synonyms

• insect cell culture
• in vitro insect culture

Related Terms

• primary culture
• continuous cell line
• baculovirus expression vector system
• Imaginal disc
• tissue engineering
• organ culture
• cell line authentication
• serum-free medium

Usage Notes

Distinguish from organ culture (maintenance of tissue architecture) and from whole-insect rearing. Continuous lines such as Sf9, Sf21, and High Five are commercially available and standardized; primary cultures require aseptic dissection and have limited lifespan. The term excludes short-term explant studies that do not establish proliferating populations. Researchers must verify cell identity and mycoplasma status, as cross-contamination between lepidopteran lines is historically common.