Innate immune system still works at diapause, a physiological state of dormancy in insects.
Biochem Biophys Res Commun
; 410(2): 351-7, 2011 Jul 01.
Article
em En
| MEDLINE
| ID: mdl-21679687
ABSTRACT
Diapause is most often observed in insects and is a physiologically dormant state different from other types of dormancy, such as hibernation. It allows insects to survive in harsh environments or extend longevity. In general, larval, pupal, or adult non-diapausing insects possess an innate immune system preventing the invasion of microorganisms into their bodies; however, it is unclear whether this system works under the dormant condition of diapause. We here report the occurrence of innate cellular reactions during diapause using pupae of a giant silkmoth, Samia cynthia pryeri. Scanning electron microscopic analysis demonstrated the presence of two major types of cells in the body fluid isolated from the thoracic region of a pupa. Phagocytosis and encapsulation, characteristics of innate cellular reactions, by these cells were observed when latex beads as foreign targets were microinjected into the internal portion of a pupa. Such behavior by these cells was still observed even when pupae were continuously chilled at 4°C. Our results indicate that innate cellular reactions can work in diapausing insects in a dormant state.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Regulação da Temperatura Corporal
/
Adaptação Fisiológica
/
Imunidade Inata
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Mariposas
Limite:
Animals
Idioma:
En
Revista:
Biochem Biophys Res Commun
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Japão