Premium
Tagma‐specific distribution of FXPRLamides in the nervous system of the American cockroach
Author(s) -
Predel Reinhard,
Eckert Manfred
Publication year - 2000
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/(sici)1096-9861(20000410)419:3<352::aid-cne7>3.0.co;2-0
Subject(s) - cockroach , suboesophageal ganglion , corpus allatum , biology , nervous system , thoracic ganglia , central nervous system , periplaneta , anatomy , ganglion , medicine , endocrinology , neuroscience , ecology , hormone , juvenile hormone
FXPRLamide (pyrokinin) distribution in the central nervous system and major neurohaemal organs of the American cockroach and related cockroach species was investigated using immunocytochemistry and MALDI‐TOF mass spectrometry. Six isoforms (Pea‐PK‐1 through ‐6) were found in different neurohaemal release sites. Pea‐PK‐1–4 and Pea‐PK‐6 are all stored in the retrocerebral complex and are all produced in cells located in both the suboesophageal ganglion (SOG) and the tritocerebrum. These pyrokinins were found to be concentrated in and around the corpora allata. No other known peptides were detectable in such high concentrations in this neurohaemal organ. They reach the corpora cardiaca/allata via the nervi corporis cardiaci‐1 (NCC‐1), NCC‐3, and nervi corporis allati‐2 (NCA‐2). Abdominal perisympathetic organs contained only Pea‐PK‐5 and low quantities of the sequence‐related Pea‐PK‐6. Neither Pea‐PK‐5 nor ‐PK‐6 was detected in thoracic perisympathetic organs. It is likely that the expression of pyrokinins in the central nervous system is tagma (body region)‐specific. Pea‐PK‐6 was identified during this study as follows: Ser‐Glu‐Ser‐Glu‐Val‐Pro‐Gly‐Met‐Trp‐Phe‐Gly‐Pro‐Arg‐Leu‐NH 2 . J. Comp. Neurol. 419:352–363, 2000. © 2000 Wiley‐Liss, Inc.