51
|
Bogomolova EV, Adon'eva NV, Gruntenko NE, Raushenbakh IY. Gonadotropins influence alkaline phosphatase activity in Drosophila virilis. DOKL BIOCHEM BIOPHYS 2007; 414:134-6. [PMID: 17695320 DOI: 10.1134/s1607672907030118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
52
|
Rauschenbach IY, Chentsova NA, Alekseev AA, Gruntenko NE, Adonyeva NV, Karpova EK, Komarova TN, Vasiliev VG, Bownes M. Dopamine and octopamine regulate 20-hydroxyecdysone level in vivo in Drosophila. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2007; 65:95-102. [PMID: 17523172 DOI: 10.1002/arch.20183] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The effects of increased level of dopamine (DA) (feeding flies with DA precursor, L-dihydroxyphenylalanine, L-DOPA) on the level of 20-hydroxyecdysone (20E) and on juvenile hormone (JH) metabolism in young (2-day-old) wild type females (the strain wt) of Drosophila virilis have been studied. Feeding the flies with L-DOPA increased DA content by a factor of 2.5, and led to a considerable increase in 20E level and a decrease of JH degradation (an increase in JH level). We have also measured the levels of 20E in the young (1-day-old) octopamineless females of the strain Tbetah(nM18) and in wild type females, Canton S, of D. melanogaster. The absence of OA led to a considerable decrease in 20E level (earlier it was shown that in the Tbetah(nM18) females, JH degradation was sharply increased). We have studied the effects of JH application on 20E level in 2-day-old wt females of D. virilis and demonstrated that an increase in JH titre results in a steep increase of 20E level. The supposition that biogenic amines act as intermediary between JH and 20E in the control of Drosophila reproduction is discussed.
Collapse
|
53
|
Gruntenko NE, Karpova EK, Alekseev AA, Chentsova NA, Bogomolova EV, Bownes M, Rauschenbach IY. Effects of octopamine on reproduction, juvenile hormone metabolism, dopamine, and 20-hydroxyecdysone contents in Drosophila. ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2007; 65:85-94. [PMID: 17523171 DOI: 10.1002/arch.20187] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The effect of an experimentally increased octopamine content (feeding flies with OA) on the levels of juvenile hormone (JH) degradation, dopamine (DA), and 20-hydroxyecdysone (20E) contents, oogenesis, and fecundity of wild type Drosophila flies has been studied. OA feeding of the flies was found to (1) cause a considerable decrease in JH degradation in females, but not males, of D. melanogaster and D. virilis; (2) have no effect on DA content in D. melanogaster and D. virilis; (3) increase 20E contents in D. virilis females; (4) decrease to a large extent the number of vitellogenic (stages 8-10) and mature (stage 14) oocytes in D. virilis; and (5) decrease the fecundity of D. melanogaster and D. virilis. A possible mechanism of action of OA as a neurohormone on the reproductive function of Drosophila is discussed.
Collapse
|
54
|
Rauschenbach IY, Bogomolova EV, Gruntenko NE, Adonyeva NV, Chentsova NA. Effects of juvenile hormone and 20-hydroxyecdysone on alkaline phosphatase activity in Drosophila under normal and heat stress conditions. JOURNAL OF INSECT PHYSIOLOGY 2007; 53:587-91. [PMID: 17433361 DOI: 10.1016/j.jinsphys.2007.02.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2007] [Revised: 02/16/2007] [Accepted: 02/21/2007] [Indexed: 05/14/2023]
Abstract
The effect of 20-hydroxyecdysone (20E) and the juvenile hormone (JH) on the activity of the alkaline phosphatase (ALP) has been studied in young females of wild-type Drosophila virilis and Drosophila melanogaster under normal conditions and under heat stress (38 degrees C). Both 20E feeding of the flies and JH application led to a substantial rise in ALP activity. ALP activity was also measured in young females of a JH-deficient strain of D. melanogaster, apterous(56f). A decrease in the enzyme activity was observed in the mutant females as compared to wild type. A rise in JH and 20E levels was found not to prevent the response of ALP to heat stress, but to change its stress-reactivity. Mechanisms of regulation of dopamine (DA) level by gonadotropins in Drosophila are discussed.
Collapse
|
55
|
Rauschenbakh II, Karpova EK, Gruntenko NE, Saprykina ZV, Shumnaia LV, Faddeeva NV. [Biogenic amines regulate the reproductive function in Drosophila as neurohormones]. ONTOGENEZ 2007; 38:52-8. [PMID: 17352294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
We studied the influence of experimental increase in the octopamine and dopamine content on the level of juvenile hormone degradation, oogenesis, and fertility in wild type D. virilis flies. Feeding of flies on octopamine led to a significantly decreased level of juvenile hormone degradation (increased titer) in young and sexually mature females, rather than in males, markedly decreased the number of vitellogenic (stages 8-10) and mature (stage 14) oocytes), and sharply reduced fertility. Feeding of flies on dopamine decreased the juvenile hormone degradation (increased titer) in young wild type females and increased it (lowered the juvenile hormone titer) in sexually mature females, as well as decreased the fertility of wild type females to a level characteristic for D. virilis line with a mutation doubling the endogenous dopamine level. A possible mechanism of the influence of these amines on the reproductive function in Drosophila as neurohormones is discussed and a conclusion is drawn that the reduced fertility of females at an increased level of amines appears to be related to an increased level of ecdysteroids, which is caused by an increased, as a result of decreased degradation, juvenile hormone titer.
Collapse
|
56
|
Rauschenbach IY, Chentsova NA, Gruntenko NE, Alekseev AA, Adon'eva NV. Octopamine regulates the 20-hydroxyecdysone level in Drosophila females. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2006; 411:461-3. [PMID: 17425040 DOI: 10.1134/s001249660606010x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
|
57
|
Rauschenbach IY, Gruntenko NE, Karpova EK, Alekseev AA, Chentsova NA. Effect of octopamine on Drosophila melanogaster reproduction is mediated by gonadotropins. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2006; 410:407-9. [PMID: 17278849 DOI: 10.1134/s0012496606050188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
|
58
|
Rauschenbach II, Chentsova NA, Alekseev AA, Gruntenko NE, Karpova EK. Dopamine affects the level of 20-hydroxyecdysone in Drosophila virilis females. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2006; 407:179-81. [PMID: 16739488 DOI: 10.1134/s0012496606020190] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
59
|
Raushenbakh II, Gruntenko NE, Karpova EK, Adon'eva NV, Alekseev AA, Chentsova NA, Shumnaia LV, Faddeeva NV. [The mechanism of the effect of apterous56f mutation on the reproductive function of Drosophila melanogaster]. GENETIKA 2006; 42:169-76. [PMID: 16583700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The effects of L-dihydroxyphenylalanine (L-DOPA) and 20-hydroxyecdysone (20E) were studied with respect to the content of dopamine (DA), intensity of the juvenile hormone (JH) degradation, and fecundity of the wildtype flies (Canton S) and JH-deficient apterous56f mutants (in young females, carrying this mutation, the levels of DA and 20E production were strongly increased). Fly feeding with L-DOPA proved to increase the level of DA in a dose-dependent manner and reduce JH degradation in 2-day-old females of both strains. Feeding with 20E produced the same effect. Treating the wild-type flies with 2.5 mg L-DOPA caused a 24-h delay in beginning of oviposition and reduction in fecundity throughout the experiment. An L-DOPA dose of 1 mg caused no such changes. An experimental increase in 20E titer led to reduced fecundity of the wild-type flies, though no delay in oviposition was observed. In mutant flies, an increase in DA and 20E levels accelerated beginning of oviposition and increased fecundity of young females, though the latter parameter was reduced in mature individuals. Thus, an increase in endogenous DA and 20E characteristic of young apterous56f females is assumed to be a compensatory response that leads to a higher JH titer and induction of vitellogenesis.
Collapse
|
60
|
Gruntenko NE, Karpova EK, Alekseev AA, Chentsova NA, Shumnaya LV, Ushakova MA, Raushenbakh IY. An increase in the dopamine level accelerates sexual maturation of Drosophila melanogaster deficient in the juvenile hormone. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2006; 406:88-90. [PMID: 16572823 DOI: 10.1134/s001249660601025x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
|
61
|
Karpova EK, Gruntenko NE, Raushenbakh II. [The ecdysoneless1 gene regulates metabolism of the juvenile hormone and dopamine in Drosophila melanogaster]. GENETIKA 2005; 41:1480-6. [PMID: 16358715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The dopamine (DA) content and the level of juvenile hormone (JH) degradation were studied in females of the wild-type Canton S strain and the ecdysoneless1 (ecd1) mutant, which does not produce ecdysone at a restrictive temperature (29 degrees C). Exposure at the restrictive temperature considerably increased the JH-hydrolyzing activity and the DA content in five-day ecd1 females compared with flies of both strains growing at 19 degrees C and Canton S females exposed at 29 degrees C. In one-day ecd1 females, the level of JH degradation also increased at the restrictive temperature, but the DA content was low. The effect of ecdysone deficiency on the stress response in Drosophila melanogaster females was studied using changes in DA content and JH degradation were used as indices. The ecd1 mutation did not prevent the initiation of the stress response in females exposed at the restrictive temperature, but changed its intensity (stress reactivity). The interaction of 20-hydroxyecdysone with JH and DA in regulating Drosophila reproduction under normal conditions and in stress is discussed.
Collapse
|
62
|
Gruntenko NE, Karpova EK, Alekseev AA, Chentsova NA, Saprykina ZV, Bownes M, Rauschenbach IY. Effects of dopamine on juvenile hormone metabolism and fitness in Drosophila virilis. JOURNAL OF INSECT PHYSIOLOGY 2005; 51:959-68. [PMID: 15967456 DOI: 10.1016/j.jinsphys.2005.04.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2005] [Revised: 04/15/2005] [Accepted: 04/19/2005] [Indexed: 05/03/2023]
Abstract
The effects of dopamine (DA) on juvenile hormone (JH) metabolism and fitness (estimated as fecundity and viability levels under heat stress (38 degrees C)) in Drosophila virilis have been studied. An increase of DA level obtained by feeding with DA reduced fitness of wild-type (wt) flies under stress, and decreased JH degradation in young wt females while increasing it in sexually mature wt females. A decrease in DA levels resulted from 3-iodo-tyrosine treatment and caused a decrease in JH degradation in sexually mature wt and heat sensitive (hs) mutant females (DA level in hs females is twice as high in wt females). A dramatic decrease in viability under stress and fecundity under normal conditions in wt, but not hs, females was observed. 3-iodo-tyrosine treatment also reduced the number of oocytes at stages 8-14, delayed oocyte transition to stage 10 and resulted in the accumulation of mature eggs in wt females. It delayed maturation of wt, but not hs, males as well, but did not affect their fertility. This advances our understanding of the regulation of JH metabolism by DA in Drosophila and suggests a crucial role for the basal DA level in fitness.
Collapse
|
63
|
Gruntenko NE, Karpova EK, Adonyeva NV, Chentsova NA, Faddeeva NV, Alekseev AA, Rauschenbach IY. Juvenile hormone, 20-hydroxyecdysone and dopamine interaction in Drosophila virilis reproduction under normal and nutritional stress conditions. JOURNAL OF INSECT PHYSIOLOGY 2005; 51:417-25. [PMID: 15890185 DOI: 10.1016/j.jinsphys.2005.01.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2004] [Revised: 01/26/2005] [Accepted: 01/26/2005] [Indexed: 05/02/2023]
Abstract
To elucidate the role of the juvenile hormone (JH) in the control of Drosophila reproduction under stress, JH degradation, dopamine (DA) content and reproduction were studied upon 20E treatment in Drosophila virilis females of wild type (wt) and a mutant, with increased 20E level and decreased fertility, under normal and nutritional stress conditions. 20E treatment of wt flies for 7 days results in an increase of DA content in young females, but a decrease in mature females, a decrease of JH degradation in both young and mature females, an 1-day delay in onset of oviposition and a decrease of fecundity to the level typical of mutant flies. One day of 20E treatment in 7-day-old fed and starved flies results in a small decrease of JH degradation in the fed females and a great decrease in the starved ones. Fecundity decreases in the fed flies to the levels of the starved untreated flies in both wt and mutant strains. An oviposition arrest is observed in the treated and the untreated starved, but not in the treated fed, females of both strains. The data obtained suggest ecdysone control of JH metabolism mediated via DA.
Collapse
|
64
|
Gruntenko NE, Karpova EK, Alekseev AA, Faddeeva NV, Raushenbakh IY. Experimental decrease in dopamine level dramatically decreases Drosophila virilis fitness. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2005; 401:127-9. [PMID: 16003876 DOI: 10.1007/s10630-005-0063-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
|
65
|
Raushenbakh II, Adon'eva NV, Gruntenko NE, Karpova EK, Fadeeva NF. [Juvenile hormone controls egg laying and fertility in Drosophila virilis during starvation]. ONTOGENEZ 2004; 35:451-6. [PMID: 15624776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Degradation of juvenile hormone and reproductive function during starvation and experimental increase of the juvenile hormone titer were studied in wild type and mutant D. virilis females incapable to respond to heat stress by changes in juvenile hormone metabolism and fertility. After 24-hour starvation, the females of both lines were characterized by a decreased level of juvenile hormone degradation, 24-hour delay of egg laying, increased egg laying within 3 h after the termination of starvation, and decreased fertility within three days. Application of exogenous juvenile hormone also led to a decreased level of its degradation and 24-hour arrest of egg laying. Experimental increase of the juvenile hormone titer before the beginning of starvation led to a sharply increased fertility (number of laid eggs and number of progenies) within the first 24 h after the termination of starvation. The dynamics of juvenile hormone degradation and of fertility were similar after starvation and upon application of the exogenous hormone. The role of juvenile hormone in the control of egg maturation and laying under stress conditions has been discussed.
Collapse
|
66
|
Rauschenbach IY, Gruntenko NE, Chentsova NA, Adon'eva NV, Karpova EK. Feedback regulation of juvenile hormone titer by biogenic amines in Drosophilidae. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2004; 397:324-5. [PMID: 15508587 DOI: 10.1023/b:dobs.0000039705.29326.b8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
|
67
|
Gruntenko NE, Raushenbakh II. [Adaptive value of genes controlling the level of biogenic amines in Drosophila]. GENETIKA 2004; 40:869-876. [PMID: 15458196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The effects of mutations that change the level of biogenic amines (octopamine and dopamine) on stress-reactivity and fitness of Drosophila imagoes are considered. It has been shown that (1) the biogenic amines represent an important but not triggering factor of the development of stress reaction; (2) under normal conditions, reproduction is regulated by genes that control dopamine metabolic pathways (indirectly via regulation of the juvenile hormone level). Under unfavorable conditions, reproduction is regulated by genes that control octopamine metabolism; (3) heat-stress adaptation depends on expression of genes controlling the background level of dopamine.
Collapse
|
68
|
Gruntenko NE, Karpova EK, Rauschenbach IY. Juvenile hormone regulates oviposition in Drosophila exposed to heat stress. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2004; 392:425-7. [PMID: 14650876 DOI: 10.1023/a:1026184006871] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
69
|
Raushenbach IY, Gruntenko NE, Bownes M, Adonieva NV, Terashima J, Karpova EK, Faddeeva NV, Chentsova NA. The role of juvenile hormone in the control of reproductive function in Drosophila virilis under nutritional stress. JOURNAL OF INSECT PHYSIOLOGY 2004; 50:323-330. [PMID: 15081825 DOI: 10.1016/j.jinsphys.2004.02.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2003] [Revised: 01/27/2004] [Accepted: 02/03/2004] [Indexed: 05/24/2023]
Abstract
To investigate the role of juvenile hormone (JH) in the control of Drosophila reproduction under stress, JH degradation and reproduction were studied under nutritional stress and JH treatment in Drosophila virilis females of wild type (wt) and a heat stress (hs) mutant: this mutant does not respond to heat stress by alterations in JH metabolism and has decreased JH level and fertility under normal conditions. One day of starvation results in a decrease of JH degradation, a delay in oocyte maturation, degradation of early vitellogenic egg chambers, accumulation of mature oocytes and a 24 h oviposition arrest in both wt and hs females. A fertility decrease was observed in both wt and hs females 24 h following the end of starvation. JH treatment leads to a decrease of JH degradation and an arrest of oviposition for 24 h in fed females. JH treatment prior to starvation seems to protect some oocytes from resorption: in JH-treated wt females, fertility increases rapidly following the end of starvation. The dynamics of JH degradation and fertility are similar following starvation and JH treatment. The role of JH in the accumulation of mature oocytes and the delay of oviposition under stress are discussed.
Collapse
|
70
|
Rauschenbach IY, Chentsova NA, Gruntenko NE, Faddeeva NV, Bogomolova EV. The balance of the alleles that determine basal dopamine level in Drosophila is adaptive for a population. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2003; 393:568-70. [PMID: 14994553 DOI: 10.1023/b:dobs.0000010326.20862.69] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
|
71
|
Gruntenko NE, Bownes M, Terashima J, Sukhanova MZ, Raushenbach IY. Heat stress affects oogenesis differently in wild-type Drosophila virilis and a mutant with altered juvenile hormone and 20-hydroxyecdysone levels. INSECT MOLECULAR BIOLOGY 2003; 12:393-404. [PMID: 12864919 DOI: 10.1046/j.1365-2583.2003.00424.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The link between reproduction and environmental signals is poorly understood at the physiological, genetic and molecular levels. We describe a mutant strain of Drosophila virilis that has altered responses to heat stress. Heat stress in wild-type females results in oocyte maturation delays, degradation of early vitellogenic egg chambers, inhibition of yolk protein gene expression in follicle cells and accumulation of mature oocytes. The mutant females have increased levels of ecdysteroids and decreased juvenile hormone degradation, and show all of the heat-stress-induced reproductive effects observed in wild-type flies, without exposure to heat stress. During oogenesis in mutant females following heat stress there is an increase in early vitellogenic oocyte degradation and some degradation of late egg chambers. 20-Hydroxyecdysone levels, but not juvenile hormone degradation, change following heat stress in mutant females.
Collapse
|
72
|
Gruntenko NE, Chentsova NA, Andreenkova EV, Bownes M, Segal D, Adonyeva NV, Rauschenbach IY. Stress response in a juvenile hormone-deficient Drosophila melanogaster mutant apterous56f. INSECT MOLECULAR BIOLOGY 2003; 12:353-363. [PMID: 12864915 DOI: 10.1046/j.1365-2583.2003.00419.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The apterous56f (ap56f) mutation leads to increases in juvenile hormone (JH) degradation levels and JH-esterase makes a greater contribution to the increase than JH-epoxide hydrolase. Dopamine levels in ap56f females, but not males, are higher than in wild-type. JH treatment of ap56f and wild-type females decreases their dopamine levels. ap56f females, but not males, produce less progeny. Survival under heat stress is dramatically decreased in ap56f females, but not males. ap56f flies show a stress reaction, as judged by changes in tyrosine decarboxylase and JH-hydrolysing activities, dopamine levels and fertility, but its intensity in the mutant females, but not males, differs significantly from wild-type. Thus, the ap56f mutation causes dramatic changes in female, but not male, metabolism and fitness.
Collapse
|
73
|
Rauschenbach IY, Gruntenko NE, Bownes M, Karpova EK, Chentsova NA, Sukhanova MZ, Adon'eva NV. Ecdysteroids and juvenile hormone control the early and late stages of oogenesis, respectively, during stress in Drosophila. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2003; 389:127-9. [PMID: 12854409 DOI: 10.1023/a:1023418808700] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
74
|
Chentsova NA, Gruntenko NE, Bogomolova EV, Adonyeva NV, Karpova EK, Rauschenbach IY. Stress response in Drosophila melanogaster strain inactive with decreased tyramine and octopamine contents. J Comp Physiol B 2002; 172:643-50. [PMID: 12355233 DOI: 10.1007/s00360-002-0293-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/18/2002] [Indexed: 11/29/2022]
Abstract
Juvenile hormone hydrolysis, tyrosine decarboxylase activity, dopamine content and fitness (viability and fertility) were studied under normal and stress conditions in the adults of Drosophila melanogaster inactive strain carrying a mutation that decreases tyrosine decarboxylase activity and results in the lower contents of tyramine and octopamine. A sexual dimorphism of tyrosine decarboxylase activity, dopamine level and survival under heat stress in inactive flies was found. inactive adults showed higher dopamine levels and lower survival levels under heat stress as compared to wild type (Canton S) adults. Juvenile hormone degradation is decreased in young and increased in mature inactive females as compared to wild type. Fertility of the inactive strain did not differ from that of wild type strain under normal conditions, but after heat exposure the dynamics of its restoration was different. inactive females were found to develop the stress reaction, with juvenile hormone degradation, tyrosine decarboxylase activity, dopamine content and fertility levels used as the reaction indicators.
Collapse
|
75
|
Rauschenbach IY, Adon'eva NV, Gruntenko NE, Karpova EK, Chentsova NA, Faddeeva NV. The synthesis and degradation of juvenile hormone in Drosophila are under common control. DOKLADY BIOLOGICAL SCIENCES : PROCEEDINGS OF THE ACADEMY OF SCIENCES OF THE USSR, BIOLOGICAL SCIENCES SECTIONS 2002; 386:448-50. [PMID: 12474763 DOI: 10.1023/a:1020722519750] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|