1
|
Raghavan SDA, Ayanath A. Effect of 20-OH ecdysone and methyl farnesoate on moulting in the freshwater crab Travancoriana schirnerae. INVERTEBR REPROD DEV 2019. [DOI: 10.1080/07924259.2019.1653387] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
| | - Aswani Ayanath
- Department of Zoology, Mary Matha Arts & Science College, Wayanad, India
| |
Collapse
|
2
|
Nakatsuji T, Sonobe H. Regulation of ecdysteroid secretion from the Y-organ by molt-inhibiting hormone in the American crayfish, Procambarus clarkii. Gen Comp Endocrinol 2004; 135:358-64. [PMID: 14723887 DOI: 10.1016/j.ygcen.2003.11.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In crustaceans, molt-inhibiting hormone (MIH) has been proposed to regulate molting by inhibiting the secretion of ecdysteroids from the Y-organ. Thus, MIH titer in the hemolymph should be inversely related to ecdysteroid titers during the molt cycle. However, it has not been demonstrated whether the MIH titer in the hemolymph changes during the molt cycle. The purpose of this study was to determine the changes in the MIH titers in the hemolymph during the molt cycle of the American crayfish, Procambarus clarkii, and to discuss the role of MIH in regulation of molting. As predicted by the hypothesis, the hemolymph MIH titer was high at the intermolt stage when the hemolymph ecdysteroid titer was low, and the MIH titer decreased to a basal level at the early premolt stage when the hemolymph ecdysteroid titer began to increase slightly. At the middle premolt stage when the hemolymph ecdysteroid titer increased, the MIH titer was restored to a level as high as that during the intermolt stage. This is in contradiction to the hypothesis. However, the Y-organs at this stage scarcely responded to MIH both in vitro and in vivo. The present findings suggest that ecdysteroid secretion from the Y-organ may be regulated not only by changes in the hemolymph MIH titer, but also by changes in the responsiveness of the Y-organ to MIH.
Collapse
Affiliation(s)
- Teruaki Nakatsuji
- Department of Life and Functional Material Science, Graduate School of Natural Sciences, Konan University, Kobe 658-8501, Japan
| | | |
Collapse
|
3
|
|
4
|
GROSS PAULS, KNOWLTON ROBERTE. Effects of timed eyestalk ablation on molting in larvae of the snapping shrimp, Alpheus heterochaelisSay. INVERTEBR REPROD DEV 1997. [DOI: 10.1080/07924259.1997.9672612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
5
|
Cariolou MA, Flytzanis CN. Differential expression of cuticle-epidermis proteins in the shrimp Penaeus vannamei during molting. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. BIOCHEMISTRY AND MOLECULAR BIOLOGY 1994; 108:367-73. [PMID: 8081660 DOI: 10.1016/0305-0491(94)90088-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
High-resolution mini-two-dimensional polyacrylamide gel electrophoresis (mini-2D-PAGE) was used to analyze silver-stained, soluble proteins from the cuticle-epidermis of Penaeus vannamei during molting. The 2D-PAGE patterns of epidermis polypeptides from metecdysis and anecdysis/proecdysis molt stages demonstrated similarities as well as several quantitative and qualitative differences. Quantitative modulation in polypeptide expression was noted in at least seven prevalent polypeptides during molting. A 50 kDa protein is specifically expressed in anecdysis/proecdysis tissue samples. Quantitative and qualitative differences were also noted in proteins migrating mainly in the molecular mass ranges of 26-32 kDa. An overall increase in polypeptide expression was noted in this molecular mass range at metecdysis as compared to anecdysis/proecdysis epidermis tissues. These results indicate modulation of cuticle-epidermis proteins in Penaeus vannamei shrimps during molting.
Collapse
Affiliation(s)
- M A Cariolou
- Baylor College of Medicine, Department of Cell Biology, Houston, TX 77030
| | | |
Collapse
|
6
|
Chan SM, Rankin SM, Keeley LL. Effects of 20-hydroxyecdysone injection and eyestalk ablation on the moulting cycle of the shrimp, Penaeus vannamei. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0300-9629(90)90066-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
7
|
Chang ES, Bruce MJ, Newcomb RW. Purification and amino acid composition of a peptide with molt-inhibiting activity from the lobster, Homarus americanus. Gen Comp Endocrinol 1987; 65:56-64. [PMID: 3803902 DOI: 10.1016/0016-6480(87)90222-x] [Citation(s) in RCA: 56] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A peptide was isolated and purified from sinus glands of the lobster, Homarus americanus, that was able to decrease circulating titers of ecdysteroids and increase the molt interval of eyestalk-ablated juvenile lobsters. This molt-inhibiting activity was demonstrated to consist of two very closely related peptides by means of high-performance liquid chromatography and gel electrophoresis. By means of amino acid analyses, a molecular weight of approximately 8700 was obtained.
Collapse
|
8
|
Webster SG. Neurohormonal control of ecdysteroid biosynthesis by Carcinus maenas Y-organs in vitro, and preliminary characterization of the putative molt-inhibiting hormone (MIH). Gen Comp Endocrinol 1986; 61:237-47. [PMID: 3956985 DOI: 10.1016/0016-6480(86)90201-7] [Citation(s) in RCA: 67] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Using simple culture techniques, the effects of neurosecretory tissue, sinus gland-conditioned media, and sinus gland extracts upon the biosynthesis of ecdysteroids by Carcinus maenas Y-organs in vitro were investigated. The sinus glands were found to be a major source of a factor which profoundly repressed ecdysteroid synthesis and which did not appear to be species-specific within other brachyurans examined (Liocarcinus, Cancer). It is suggested that the inhibitory factor is produced by the neurosecretory tissues of the medulla terminalis. It is argued that the inhibitory factor is the putative molt-inhibiting hormone (MIH). Partial characterization revealed that MIH is a heat-stable, trypsin-sensitive neuropeptide, eluting on a Sephadex G-50 gel in a range of approximately 6-14 kDa. By consideration of the dose-response characteristics, it is estimated that MIH may be active in the subpicomolar range.
Collapse
|
9
|
Mattson MP, Spaziani E. Characterization of molt-inhibiting hormone (MIH) action on crustacean Y-organ segments and dispersed cells in culture and a bioassay for MIH activity. THE JOURNAL OF EXPERIMENTAL ZOOLOGY 1985; 236:93-101. [PMID: 4056706 DOI: 10.1002/jez.1402360113] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Ecdysteroid secretion in vitro by gland quarters and dispersed cells of ecdysial glands (Y-organs) of the crab, Cancer antennarius Stimpson, was characterized. Optimum culture conditions are reported for maximum, sustained (72 hr) secretion and maintenance of cell viability in activated Y-organs obtained from de-eyestalked donors. Addition in vitro of eyestalk ganglia extracts containing the putative molt-inhibiting hormone (MIH) inhibited ecdysteroid production dose-dependently in the range of 0.1-4.0 and 0.01-4.0 eyestalk equivalents of MIH for gland quarters and dispersed cells, respectively. Inhibition by MIH was reversible, tissue specific as to source of MIH activity, and did not affect cell viability relative to controls. The results of replicate incubations of gland quarters with MIH were analyzed with formal statistics of parallel-line assay. The inhibitory action on ecdysteroid secretion is shown to be reproducibly linear and parallel in the dosage range, 0.1-4.0 eyestalk equivalents, amenable to calculation of relative potency among successive extracts, and of sufficiently high precision to serve as an MIH bioassay. Also, the results of these studies support the hypothesis that control of Y-organs by the eyestalks is physiologically direct.
Collapse
|
10
|
Abstract
The putative neuropeptide, molt-inhibiting hormone (MIH), regulates crustacean growth by periodically suppressing the secretion of ecdysteroid molting hormone from peripheral glands (Y-organs). A mediating role for cyclic AMP (cAMP) in MIH action was evaluated with isolated Y-organs of the crab, Cancer antennarius. MIH activity in eyestalk extracts inhibited ecdysteroid secretion but increased cAMP levels dose-dependently in 24-h incubations. The cAMP rise preceded the onset of ecdysteroid suppression. Dibutyryl cAMP, activators of adenylate cyclase (forskolin, choleragen), and an inhibitor of phosphodiesterase (IBMX), but not AMP or cGMP, mimicked the inhibitory action of MIH.
Collapse
|
11
|
Abstract
Biological and immunological relationships between molt-inhibiting hormone (MIH) activity in eyestalk ganglia extracts of the crab, Cancer antennarius Stimpson, and peptides of the vasopressin-oxytocin family were assessed. Lysine vasopressin (LVP), arginine vasopressin (AVP), vasotocin (VT), and oxytocin (OT) mimicked MIH action by inhibiting ecdysteroid production of Y-organ segments in vitro with the relative potencies LVP greater than AVP greater than VT much much greater than OT. The inhibitory effect was reversible and specific (6 other peptides did not alter Y-organ activity). MIH and LVP increased Y-organ cyclic adenosine 3',5' monophosphate (cAMP) levels dose-dependently and with identical time course in which the rise in cAMP preceded inhibition of ecdysteroid production. The synthetic vasopressin antidiuretic agonist 1-deamino-8-D-AVP (dDAVP) inhibited Y-organ steroidogenesis dose-dependently; the vasopressin analog ([1(B-mercapto-beta, beta-cyclopentamethylenepropionic acid), 2-(O-methyl)tyrosine[AVP) (d(CH2)5Tyr(Me)AVP), a vasopressor antagonist, had no effect on basal or MIH-suppressed steroidogenesis. AVP antiserum abolished the inhibitory action of MIH, LVP, and AVP. Competitive binding curves for MIH, LVP, AVP, VT, and OT with the AVP antiserum suggested that MIH is most closely related to LVP. MIH may be structurally related to the vasopressins and act on Y-organ cells via type V2 (cAMP-linked) receptors.
Collapse
|
12
|
Watson RD, Spaziani E. Biosynthesis of ecdysteroids from cholesterol by crab Y-organs, and eyestalk suppression of cholesterol uptake and secretory activity, in vitro. Gen Comp Endocrinol 1985; 59:140-8. [PMID: 4018549 DOI: 10.1016/0016-6480(85)90428-9] [Citation(s) in RCA: 64] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Precursor incorporation studies were conducted in vitro with activated Y-organs from 48-hr de-eyestalked Cancer antennarius donors. When the glands were prelabeled in vivo by systemic injection of [3H]cholesterol 12 hr prior to removal, and subsequently incubated 24 hr in label-free medium, the glands secreted 3H-labeled ecdysone. The glands also secreted an unidentified ecdysteroid with comigrating 3H-label with characteristic retention time on normal-phase HPLC of 4 min (4-min unknown). The compound is less polar, and is secreted in a quantity and apparent specific activity approximately fivefold greater, than ecdysone. Compared with chromatographic retention times and competitive binding curves of authentic standards, the 4-min unknown was determined not to be ponasterone A, inokosterone, makisterone, or several other possible products or intermediates. In contrast with Y-organs from intact donors, those from de-eyestalked crabs exhibit greatly increased cholesterol uptake and secretion of both ecdysone and 4-min unknown in vitro. All three responses were suppressed in dose-dependent manner by eyestalk extract in the dose range, 1-4 eyestalk equivalents/Y-organ. Secretion of 4-min unknown was the response most sensitive to eyestalk extract (requiring the least dose for 50% inhibition).
Collapse
|
13
|
Watson RD, Spaziani E. Effects of eyestalk removal on cholesterol uptake and ecdysone secretion by crab (Cancer antennarius) Y-organs in vitro. Gen Comp Endocrinol 1985; 57:360-70. [PMID: 3988020 DOI: 10.1016/0016-6480(85)90215-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Y-Organs and control tissues from intact (intermolt) and 48-hr de-eyestalked Cancer antennarius donors were cultured for 12 and 24 hr in crustacean saline supplemented 10% with crab serum and containing [14C]cholesterol. Under these conditions, Y-organs took up significantly more [14C]cholesterol than ovary or muscle, and Y-organs from 48-hr de-eyestalked crabs took up threefold more than Y-organs from intact crabs. The labeled cholesterol of the culture medium was observed to bind rapidly to the lipoproteins of the serum supplement; subcellular fractionation of the activated Y-organs after incubation showed 59% of the label localized in the cytosolic fraction. The increase in cholesterol uptake did not result from a change in extracellular volume, and was not accompanied by a change in Y-organ total cholesterol. It was, however, accompanied by a greater than threefold increase in ecdysone secretion.
Collapse
|
14
|
Vensel WH, Spaziani E, Ostedgaard LS. Cholesterol turnover and ecdysone content in tissues of normal and de-eyestalked crabs (Cancer antennarius). ACTA ACUST UNITED AC 1984. [DOI: 10.1002/jez.1402290306] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
15
|
Demonstration of a molt-inhibiting hormone from the sinus gland of the lobster, Homaru americanus. ACTA ACUST UNITED AC 1984. [DOI: 10.1016/0300-9629(84)90538-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
16
|
Webster SG. Effects of exogenous ecdysterone upon moulting, proecdysial development, and limb regeneration in the prawn Palaemon elegans. Gen Comp Endocrinol 1983; 49:459-69. [PMID: 6840533 DOI: 10.1016/0016-6480(83)90209-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Injection of small doses of ecdysterone accelerated moulting and proecdysis in the prawn Palaemon elegans. Injection of large doses of ecdysterone (1-10 micrograms) markedly accelerated proecdysis, but death always occurred prior to or during moulting and was accompanied by abnormal setal development and retarded cuticle formation. Dose-response curves were obtained for a range of hormone doses from 10 to 0.01 micrograms by administering ecdysterone during postmoult (stages A-B) and early premoult (stages DE0-DL0). Accelerated proecdysis and viable moulting were more marked in the group injected during early premoult (stages DE0-DL0). The sensitivity threshold for prawns injected during this time was less than 40 ng g-1 but could not be determined more precisely in view of the range of ecdysterone concentrations used. In contrast, the sensitivity threshold for ecdysterone administered during postmoult (stages A-B) was much higher, between 0.4 and 2 micrograms g-1. The possible mechanisms controlling sensitivity thresholds for ecdysterone are discussed. The effect of ecdysterone on limb regeneration was also studied. Within the concentration range used, ecdysterone was found to have no effect on the rate of limb regeneration.
Collapse
|
17
|
Soumoff C, O'Connor JD. Repression of Y-organ secretory activity by molt inhibiting hormone in the crab Pachygrapsus crassipes. Gen Comp Endocrinol 1982; 48:432-9. [PMID: 7160610 DOI: 10.1016/0016-6480(82)90178-2] [Citation(s) in RCA: 91] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
18
|
Freeman JA. Hormonal control of chitinolytic activity in the integument of Balanus amphitrite, in vitro. ACTA ACUST UNITED AC 1980. [DOI: 10.1016/0300-9629(80)90380-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
19
|
Gilgan M. The inhibition of normal molting in the adult male lobster (Homarus americanus) by ecdysterone treatment. ACTA ACUST UNITED AC 1980. [DOI: 10.1016/0300-9629(80)90224-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
20
|
Freeman JA, Costlow JD. Hormonal control of apolysis in barnacle mantle tissue epidermis, in vitro. ACTA ACUST UNITED AC 1979. [DOI: 10.1002/jez.1402100217] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
21
|
Hopkins PM, Bliss DE, Sheehan SW, Boyer JR. Limb growth-controlling factors in the crab Gecarcinus lateralis, with special reference to the limb growth-inhibiting factor. Gen Comp Endocrinol 1979; 39:192-207. [PMID: 499747 DOI: 10.1016/0016-6480(79)90224-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
22
|
McConaugha JR. The effects of 20-hydroxyecdysone on survival and development of first and third stage Cancer anthonyi larvae. Gen Comp Endocrinol 1979; 37:421-7. [PMID: 456878 DOI: 10.1016/0016-6480(79)90021-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
23
|
Gilgan M, Burns B. Ecdysterone triacetate-induced molting in the American lobster (Homarus americanus). ACTA ACUST UNITED AC 1979. [DOI: 10.1016/0300-9629(79)90440-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
24
|
Rao KR. Effects of ecdysterone, inokosterone and eyestalk ablation on limb regeneration in the fiddler crab,Uca pugilator. ACTA ACUST UNITED AC 1978. [DOI: 10.1002/jez.1402030208] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
25
|
|
26
|
Gilgan M, Farquharson T. A change in the sensitivity of adult male lobsters (Homarus americanus) to ecdysterone on changing from intermolt to active premolt development. ACTA ACUST UNITED AC 1977. [DOI: 10.1016/0300-9629(77)90008-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
27
|
On the reduced sensitivity of the adult male lobster (Homarus americanus) to ecdysterone at reduced temperatures. ACTA ACUST UNITED AC 1977. [DOI: 10.1016/0300-9629(77)90009-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|