Topic
Eyestalk
About: Eyestalk is a research topic. Over the lifetime, 716 publications have been published within this topic receiving 16108 citations.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: The current review has tried to recapitulate recent studies on the role of gonadal regulatory factors in regulating crustacean reproduction.
Abstract: Control of reproductive development in crustaceans requires neuropeptides, ecdysone and methyl farnesoate (MF). A major source of neuropeptides is the X-organ–sinus gland (XO–SG) complex located in the eyestalk ganglia of crustaceans. The other regulatory factors (either peptides or neuromodulators) are produced in the brain and thoracic ganglia (TG). Two other regulatory non-peptide compounds, the steroid ecdysone and the sesquiterpene MF, are produced by the Y-organs and the mandibular organs, respectively. In the current review, I have tried to recapitulate recent studies on the role of gonadal regulatory factors in regulating crustacean reproduction.
* AG
: androgenic gland
AGH
: androgenic gland hormone
cAMP
: cyclic adenosine monophosphate
CHH
: crustacean hyperglycemic hormone
DA
: dopamine
dsRNAi
: double-stranded RNA interference
EPA
: eicosapentaenoic acid
ESA
: eyestalk ablation
FA
: farnesoic acid
FA-O-MeT
: farnesoic acid O -methyl transferase
FSH
: follicle stimulating hormone
GIH
: gonad inhibitory hormone
GSF
: gonad stimulating factor
HCG
: human chorionic gonadotrophin
HP
: hepatopancreas
HPLC
: high performance liquid chromatography
5-HT
: 5-hydoxytryptamine
JH
: juvenile hormone
LH
: luteinizing hormone
MeVg1
: Metapenaeus ensis Vg1
MF
: methyl farnesoate
MIH
: molt inhibiting hormone
MO
: mandibular organ
MS
: mass spectroscopy
OA
: octopamine
PG
: prostaglandin
SG
: sinus gland
SP
: spiperone
TG
: thoracic ganglia
Vg
: vitellogenin
VIH
: vitellogenesis inhibiting hormone
315 citations
TL;DR: This article provided an up-to-date review of the literature on the historical development of the field of "crustacean eyestalk hormones", and the names CHH, MIH, and GIH/VIH (gonad/vitellogenesis-inhibiting hormone), MOIH (mandibular organ-inhibititing hormone) were coined.
269 citations
TL;DR: The findings may be the result of 5-HT interaction with the release of different neurohormones and inhibition of methyl farnesoate synthesis, and gonad inhibiting hormone may have an intense control over ovaries and hepatopancreas.
143 citations
TL;DR: An endocrine axis-like relationship between the sinus gland, the AG, and the male reproductive system in decapod crustaceans is suggested, suggesting a direct effect of AG-borne hormones on the testes.
135 citations
1 Jan 2002
TL;DR: The first peptide which fulfilled criteria for an MIH by the demonstration that it suppressed ecdysteroid synthesis in molting glands (Y-organs) was isolated and sequenced from sinus glands of Carcinus maenas (Webster 1991), which turned out to be similar to CHH (see third section).
Abstract: Abramowitz et al. (1944) were the first to demonstrate that injection of an extract from eyestalks of Uca pugilator into the blue crab, Callinectus sapidus, caused a rather drastic increase of the blood sugar level. They found this “diabetogenic factor” to be heat-stable, very potent (0.001 eyestalk equivalents gave a significant effect), and mainly confined to Hanstrom’s sinus gland, a neurohemal organ associated with the eyestalk ganglia. This suggested the existence of a hyperglycemic neurohormone. This finding was confirmed by subsequent studies and, when micromethods for peptide analysis had become widely established, this diabetogenic factor, now called crustacean hyperglycemic hormone (CHH), was isolated and fully characterized from sinus glands of the shore crab, Carcinus maenas (Kegel et al. 1989). Isolation and identification from other crustacean species followed, which led to the recognition of a family of closely related peptides. Another line of research, which originated in the early observation that eyestalk ablation accelerated molting in decapods, focused on a molt-inhibiting hormone (MIH) in the eyestalk. The first peptide which fulfilled criteria for an MIH by the demonstration that it suppressed ecdysteroid synthesis in molting glands (Y-organs) was isolated and sequenced from sinus glands of Carcinus maenas (Webster 1991). Surprisingly, this MIH turned out to be similar to CHH (see third section).
132 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 4 |
| 2024 | 20 |
| 2023 | 23 |
| 2022 | 26 |
| 2021 | 20 |
| 2020 | 14 |