Different Ca2+ signalling cascades manifested by mastoparan in the prothoracic glands of the tobacco hornworm,Manduca sexta, and the silkworm,Bombyx mori

2007 ◽  
Vol 65 (2) ◽  
pp. 52-64 ◽  
Author(s):  
Skarlatos G. Dedos ◽  
Dieter Wicher ◽  
Sabine Kaltofen ◽  
Heiner Birkenbeil
Keyword(s):  
Bombyx Mori ◽  
Manduca Sexta ◽  
Tobacco Hornworm ◽  
Prothoracic Glands ◽  
Signalling Cascades ◽  
Silkworm Bombyx Mori

Immunoblot analysis of chitinolytic enzymes in integument and molting fluid of the silkworm, Bombyx mori, and the tobacco hornworm, Manduca sexta

1992 ◽  
Vol 22 (4) ◽  
pp. 305-311 ◽  
Author(s):  
Daizo Koga ◽  
Takushi Funakoshi ◽  
Koichi Mizuki ◽  
Akio Ide ◽  
Karl J. Kramer ◽  
...  
Keyword(s):  
Bombyx Mori ◽  
Manduca Sexta ◽  
Immunoblot Analysis ◽  
Tobacco Hornworm ◽  
Chitinolytic Enzymes ◽  
Silkworm Bombyx Mori

Transcriptional regulation of the PTTH receptor in prothoracic glands of the silkworm, Bombyx mori

2012 ◽  
Vol 58 (1) ◽  
pp. 102-109 ◽  
Author(s):  
Shun-Chieh Young ◽  
Wei-Lan Yeh ◽  
Shi-Hong Gu
Keyword(s):  
Transcriptional Regulation ◽  
Bombyx Mori ◽  
Prothoracic Glands ◽  
Silkworm Bombyx Mori

Ecdysteroid synthesis and molting by the tobacco hornworm,Manduca sexta, in the absence of prothoracic glands

1991 ◽  
Vol 18 (1) ◽  
pp. 13-36 ◽  
Author(s):  
Sho Sakurai ◽  
James T. Warren ◽  
Lawrence I. Gilbert
Keyword(s):  
Manduca Sexta ◽  
Tobacco Hornworm ◽  
Prothoracic Glands

7-Dehydrosterols in prothoracic glands of the silkworm,Bombyx mori

1986 ◽  
Vol 42 (9) ◽  
pp. 1034-1036 ◽  
Author(s):  
S. Sakurai ◽  
N. Yonemura ◽  
Y. Fujimoto ◽  
F. Hata ◽  
N. Ikekawa
Keyword(s):  
Bombyx Mori ◽  
Prothoracic Glands ◽  
Silkworm Bombyx Mori

A calmodulin-sensitive adenylate cyclase in the prothoracic glands of the tobacco hornworm, Manduca sexta

1988 ◽  
Vol 59 (1-2) ◽  
pp. 67-76 ◽  
Author(s):  
V.H. Meller ◽  
W.L. Combest ◽  
W.A. Smith ◽  
L.I. Gilbert
Keyword(s):  
Adenylate Cyclase ◽  
Manduca Sexta ◽  
Tobacco Hornworm ◽  
Prothoracic Glands

Ca2+ as second messenger in PTTH-stimulated prothoracic glands of the silkworm, Bombyx mori

2002 ◽  
Vol 32 (12) ◽  
pp. 1625-1634 ◽  
Author(s):  
Heiner Birkenbeil ◽  
Skarlatos G Dedos
Keyword(s):  
Bombyx Mori ◽  
Second Messenger ◽  
Prothoracic Glands ◽  
Silkworm Bombyx Mori

scholarly journals Effects of RH‐5992 on ecdysteroidogenesis of the prothoracic glands during the fourth larval instar of the silkworm,Bombyx mori

2008 ◽  
Vol 68 (4) ◽  
pp. 197-205 ◽  
Author(s):  
Shi‐Hong Gu ◽  
Ju‐Ling Lin ◽  
Pei‐Ling Lin ◽  
Rong Kou ◽  
Guy Smagghe
Keyword(s):  
Bombyx Mori ◽  
Larval Instar ◽  
Prothoracic Glands ◽  
Fourth Larval Instar ◽  
Silkworm Bombyx Mori

scholarly journals Developmental endocrinology of larval moulting in the tobacco hornworm, Manduca sexta

1987 ◽  
Vol 128 (1) ◽  
pp. 175-192
Author(s):  
W. E. Bollenbacher ◽  
N. A. Granger ◽  
E. J. Katahira ◽  
M. A. O'Brien
Keyword(s):  
Manduca Sexta ◽  
Cumulative Effect ◽  
Peptide Hormone ◽  
Tobacco Hornworm ◽  
Corpora Allata ◽  
Indirect Measure ◽  
Prothoracic Glands ◽  
Single Burst ◽  
Larval Moult

A larval moult in the tobacco hornworm, Manduca sexta, involves an endocrine cascade that begins with the release of a cerebral peptide hormone, the prothoracicotropic hormone (PTTH). The release of PTTH is gated, occurs during the scotophase and appears to be developmentally cued. In fourth instar Manduca larvae, PTTH release into the haemolymph occurs as a single burst over a few hours during the head critical period, i.e. the time during which the head (brain) is needed for the initiation of the moult to the fifth (last) instar. Released PTTH activates the prothoracic glands (PGs), and within a few hours the cumulative effect of this event results in a dramatic increase in the haemolymph ecdysteroid titre, which then elicits the moult. An assessment of the capacity of the corpora allata (CA) to synthesize juvenile hormone (JH) in vitro indicates that the above sequence of endocrine events begins only when JH synthesis has reached a nadir for the instar. Since CA activity is an indirect measure of the haemolymph titre of the hormone, it is conceivable that the developmentally cued release of PTTH is permissively controlled by a decreasing haemolymph titre of JH. With the increase in the ecdysteroid titre which marks the end of this endocrine cascade, the CA again become active, presumably to cause the increase in the JH haemolymph titre which directs the larval moult. This investigation has thus established the temporal and quantitative dynamics of the PTTH-PG axis that drive larval moulting and provides insight into the interendocrine regulatory relationships that may exist between the ecdysteroids and JHs. These possible relationships and the role of the brain in their regulation are discussed.

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