Abstract:
:Insects taste nonvolatile chemicals through gustatory receptors (Grs) and make choices for feeding, mating, and oviposition. To date, genome projects have identified 69 Gr genes in the silkworm, Bombyx mori; however, the expression sites of these Grs remain to be explored. In this study, we used reverse transcription (RT)-PCR to investigate expression of the B. mori Gr-6 (BmGr6) gene, a member of the putative sugar clade gene family in various tissues. BmGr6 is expressed in the midgut, central nervous system (CNS), and oral sensory organs. Moreover, immunohistochemistry using an anti-BmGr6 antiserum demonstrated that BmGr6 is expressed in cells by oral sensory organs, midgut and nervous system. Furthermore, double-immunohistochemistry indicated that BmGr6 is expressed in midgut enteroendocrine cells, also in CNS neurosecretory cells. In particular, a portion of BmGr6-expressing cells, in both midgut and CNS, secretes FMRFamide-related peptides (FaRPs). These results suggest that BmGr6 functions not only as a taste receptor, but also as a chemical sensor such as for the regulation of gut movement, physiological conditions, and feeding behavior of larvae.
journal_name
Insect Biochem Mol Bioljournal_title
Insect biochemistry and molecular biologyauthors
Mang D,Shu M,Endo H,Yoshizawa Y,Nagata S,Kikuta S,Sato Rdoi
10.1016/j.ibmb.2015.12.008subject
Has Abstractpub_date
2016-03-01 00:00:00pages
85-98eissn
0965-1748issn
1879-0240pii
S0965-1748(15)30082-5journal_volume
70pub_type
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