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M. A. Kulakova - One of the best experts on this subject based on the ideXlab platform.
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correction expression of hox genes during regeneration of Nereid polychaete alitta virens annelida lophotrochozoa
Evodevo, 2013Co-Authors: Elena L Novikova, N I Bakalenko, Alexander Y Nesterenko, M. A. KulakovaAbstract:After publication it was brought to our attention that there is an ambiguity in the title and in the abstract of our paper [1] that could lead to incorrect understanding of the name of the studied species. To avoid this, the correct title should read “Expression of Hox genes during regeneration of Nereid polychaete Alitta virens (Annelida, Lophotrochozoa)” and the sentence “We have recently described the expression of 10 out of 11 Hox genes during postlarval growth of Alitta (Nereis) virens” in the abstract should read as “We have recently described the expression of 10 out of 11 Hox genes during postlarval growth of Alitta virens (formerly Nereis virens).”
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expression of hox genes during regeneration of Nereid polychaete alitta nereis virens annelida lophotrochozoa
Evodevo, 2013Co-Authors: Elena L Novikova, N I Bakalenko, Alexander Y Nesterenko, M. A. KulakovaAbstract:Background Hox genes are the key determinants of different morphogenetic events in all bilaterian animals. These genes are probably responsible for the maintenance of regenerative capacities by providing positional information in the regenerating animal body. Polychaetes are well known for their ability to regenerate the posterior as well as the anterior part of the body. We have recently described the expression of 10 out of 11 Hox genes during postlarval growth of Alitta (Nereis) virens. Hox genes form gradient overlapping expression patterns, which probably do not contribute to the morphological diversity of segments along the anterior-posterior axis of the homonomously segmented worm. We suggest that this gradient expression of Hox genes establishes positional information along the body that can be used to maintain coordinated growth and regeneration.
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hox gene expression in larval development of the polychaetes nereis virens and platynereis dumerilii annelida lophotrochozoa
Development Genes and Evolution, 2007Co-Authors: M. A. Kulakova, N I Bakalenko, Elena L Novikova, Elena Eliseeva, Patrick R H Steinmetz, R P Kostyuchenko, A K Dondua, Detlev Arendt, Charles E. Cook, Michael AkamAbstract:The bilaterian animals are divided into three great branches: the Deuterostomia, Ecdysozoa, and Lophotrochozoa. The evolution of developmental mechanisms is less studied in the Lophotrochozoa than in the other two clades. We have studied the expression of Hox genes during larval development of two lophotrochozoans, the polychaete annelids Nereis virens and Platynereis dumerilii. As reported previously, the Hox cluster of N. virens consists of at least 11 genes (de Rosa R, Grenier JK, Andreeva T, Cook CE, Adoutte A, Akam M, Carroll SB, Balavoine G, Nature, 399:772–776, 1999; Andreeva TF, Cook C, Korchagina NM, Akam M, Dondua AK, Ontogenez 32:225–233, 2001); we have also cloned nine Hox genes of P. dumerilii. Hox genes are mainly expressed in the descendants of the 2d blastomere, which form the integument of segments, ventral neural ganglia, pre-pygidial growth zone, and the pygidial lobe. Patterns of expression are similar for orthologous genes of both Nereids. In Nereis, Hox2, and Hox3 are activated before the blastopore closure, while Hox1 and Hox4 are activated just after this. Hox5 and Post2 are first active during the metatrochophore stage, and Hox7, Lox4, and Lox2 at the late nectochaete stage only. During larval stages, Hox genes are expressed in staggered domains in the developing segments and pygidial lobe. The pattern of expression of Hox cluster genes suggests their involvement in the vectorial regionalization of the larval body along the antero-posterior axis. Hox gene expression in Nereids conforms to the canonical patterns postulated for the two other evolutionary branches of the Bilateria, the Ecdysozoa and the Deuterostomia, thus supporting the evolutionary conservatism of the function of Hox genes in development.
E Kristensen - One of the best experts on this subject based on the ideXlab platform.
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Factors influencing the distribution of Nereid polychaetes: the sulfide aspect
Marine Ecology Progress Series, 1993Co-Authors: G Miron, E KristensenAbstract:A study of the spatial distribution of 3 species of Nereid polychaetes (Nereis wrens N d~verslcolorand N succjnea) was conducted during fall 1991 in Danish estuarine waters Results from fleld data (Kertemlnde Fjord/Kertlnge Nor and Norsminde Fiord) suggested that pore water sulfide (HS-) acts on the dlstnbution of these species N virens was conflned to low-sulfidic areas (
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factors influencing the distribution of Nereid polychaetes the sulfide aspect
Marine Ecology Progress Series, 1993Co-Authors: G Miron, E KristensenAbstract:A study of the spatial distribution of 3 species of Nereid polychaetes (Nereis wrens N d~verslcolorand N succjnea) was conducted during fall 1991 in Danish estuarine waters Results from fleld data (Kertemlnde Fjord/Kertlnge Nor and Norsminde Fiord) suggested that pore water sulfide (HS-) acts on the dlstnbution of these species N virens was conflned to low-sulfidic areas (<50 uM) while N succ~nea was found in hlgh-sulfldic sedlnlents (from 50 to 2000 PM) N diverslcolor on the other hand, showed a broader distrlbutlon w ~ t h respect to pore water sulflde Complementary tank experiments Indicated that all 3 specles preferred non-sulfid~c sediments In allopatry, whereas N diversicolor was excluded from the non-sulfldlc compartment of tanks In sympatry with each of the other 2 species Mortality rates Indicated that N virens was the least sulfide-tolerant species whereas the other species showed some sort of adaptation with respect to pore water sulfide Tank expenments and coexistence coefficients from field data indicated that interspecific competltlon IS an important determinant of Nereid dlstnbution patterns particularly for populations of N diversicolor Field data and results from laboratory tank experiments suggest that N succlnea is closely associated wlth mussel beds
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Behavioural response of three Nereid polychaetes to injection of sulfide inside burrows
Marine Ecology Progress Series, 1993Co-Authors: G Miron, E KristensenAbstract:The behavioural response (ventilation rate, duration of ventilation bursts, length of pauses between ventilation bursts) of 3 closely related Nereid polychaetes (Nereis virens, N. diversicolor and N. succinea) to various levels of sulfide exposure was investigated during spring and summer of 1992. The response to HSwas species specific. N. virens reacted strongly to HSby increasing the duration of ventilation bursts. Duration of rest periods was affected less severely while ventilation fa~led to show any significant vanation. The behavioural response of N. diversicolor did not show much variation under HSexposure. The only significant response was a decreased duration of rest periods at high HSconcentration. The type of reaction displayed by N. succinea was similar to the response of N. virens, although less pronounced. N. diversicolor removed most HSfrom the burrow in less than 10 rnin due to the generally high ventilation rate of this species. The slow removal of H S by the other 2 species is caused by a slower response and lower ventilation rate. The shape of the H S efflux curve indicated that changes in the response during exposure are important in N. virens and substantiate a possible toxic effect of HSN. diversicolor displayed the fastest recuperation following HSexposure (restored ventilation behaviour). For all species, time of recuperation increased with increasing sulfide concentration.
Elena L Novikova - One of the best experts on this subject based on the ideXlab platform.
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correction expression of hox genes during regeneration of Nereid polychaete alitta virens annelida lophotrochozoa
Evodevo, 2013Co-Authors: Elena L Novikova, N I Bakalenko, Alexander Y Nesterenko, M. A. KulakovaAbstract:After publication it was brought to our attention that there is an ambiguity in the title and in the abstract of our paper [1] that could lead to incorrect understanding of the name of the studied species. To avoid this, the correct title should read “Expression of Hox genes during regeneration of Nereid polychaete Alitta virens (Annelida, Lophotrochozoa)” and the sentence “We have recently described the expression of 10 out of 11 Hox genes during postlarval growth of Alitta (Nereis) virens” in the abstract should read as “We have recently described the expression of 10 out of 11 Hox genes during postlarval growth of Alitta virens (formerly Nereis virens).”
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expression of hox genes during regeneration of Nereid polychaete alitta nereis virens annelida lophotrochozoa
Evodevo, 2013Co-Authors: Elena L Novikova, N I Bakalenko, Alexander Y Nesterenko, M. A. KulakovaAbstract:Background Hox genes are the key determinants of different morphogenetic events in all bilaterian animals. These genes are probably responsible for the maintenance of regenerative capacities by providing positional information in the regenerating animal body. Polychaetes are well known for their ability to regenerate the posterior as well as the anterior part of the body. We have recently described the expression of 10 out of 11 Hox genes during postlarval growth of Alitta (Nereis) virens. Hox genes form gradient overlapping expression patterns, which probably do not contribute to the morphological diversity of segments along the anterior-posterior axis of the homonomously segmented worm. We suggest that this gradient expression of Hox genes establishes positional information along the body that can be used to maintain coordinated growth and regeneration.
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hox gene expression in larval development of the polychaetes nereis virens and platynereis dumerilii annelida lophotrochozoa
Development Genes and Evolution, 2007Co-Authors: M. A. Kulakova, N I Bakalenko, Elena L Novikova, Elena Eliseeva, Patrick R H Steinmetz, R P Kostyuchenko, A K Dondua, Detlev Arendt, Charles E. Cook, Michael AkamAbstract:The bilaterian animals are divided into three great branches: the Deuterostomia, Ecdysozoa, and Lophotrochozoa. The evolution of developmental mechanisms is less studied in the Lophotrochozoa than in the other two clades. We have studied the expression of Hox genes during larval development of two lophotrochozoans, the polychaete annelids Nereis virens and Platynereis dumerilii. As reported previously, the Hox cluster of N. virens consists of at least 11 genes (de Rosa R, Grenier JK, Andreeva T, Cook CE, Adoutte A, Akam M, Carroll SB, Balavoine G, Nature, 399:772–776, 1999; Andreeva TF, Cook C, Korchagina NM, Akam M, Dondua AK, Ontogenez 32:225–233, 2001); we have also cloned nine Hox genes of P. dumerilii. Hox genes are mainly expressed in the descendants of the 2d blastomere, which form the integument of segments, ventral neural ganglia, pre-pygidial growth zone, and the pygidial lobe. Patterns of expression are similar for orthologous genes of both Nereids. In Nereis, Hox2, and Hox3 are activated before the blastopore closure, while Hox1 and Hox4 are activated just after this. Hox5 and Post2 are first active during the metatrochophore stage, and Hox7, Lox4, and Lox2 at the late nectochaete stage only. During larval stages, Hox genes are expressed in staggered domains in the developing segments and pygidial lobe. The pattern of expression of Hox cluster genes suggests their involvement in the vectorial regionalization of the larval body along the antero-posterior axis. Hox gene expression in Nereids conforms to the canonical patterns postulated for the two other evolutionary branches of the Bilateria, the Ecdysozoa and the Deuterostomia, thus supporting the evolutionary conservatism of the function of Hox genes in development.
N I Bakalenko - One of the best experts on this subject based on the ideXlab platform.
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correction expression of hox genes during regeneration of Nereid polychaete alitta virens annelida lophotrochozoa
Evodevo, 2013Co-Authors: Elena L Novikova, N I Bakalenko, Alexander Y Nesterenko, M. A. KulakovaAbstract:After publication it was brought to our attention that there is an ambiguity in the title and in the abstract of our paper [1] that could lead to incorrect understanding of the name of the studied species. To avoid this, the correct title should read “Expression of Hox genes during regeneration of Nereid polychaete Alitta virens (Annelida, Lophotrochozoa)” and the sentence “We have recently described the expression of 10 out of 11 Hox genes during postlarval growth of Alitta (Nereis) virens” in the abstract should read as “We have recently described the expression of 10 out of 11 Hox genes during postlarval growth of Alitta virens (formerly Nereis virens).”
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expression of hox genes during regeneration of Nereid polychaete alitta nereis virens annelida lophotrochozoa
Evodevo, 2013Co-Authors: Elena L Novikova, N I Bakalenko, Alexander Y Nesterenko, M. A. KulakovaAbstract:Background Hox genes are the key determinants of different morphogenetic events in all bilaterian animals. These genes are probably responsible for the maintenance of regenerative capacities by providing positional information in the regenerating animal body. Polychaetes are well known for their ability to regenerate the posterior as well as the anterior part of the body. We have recently described the expression of 10 out of 11 Hox genes during postlarval growth of Alitta (Nereis) virens. Hox genes form gradient overlapping expression patterns, which probably do not contribute to the morphological diversity of segments along the anterior-posterior axis of the homonomously segmented worm. We suggest that this gradient expression of Hox genes establishes positional information along the body that can be used to maintain coordinated growth and regeneration.
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hox gene expression in larval development of the polychaetes nereis virens and platynereis dumerilii annelida lophotrochozoa
Development Genes and Evolution, 2007Co-Authors: M. A. Kulakova, N I Bakalenko, Elena L Novikova, Elena Eliseeva, Patrick R H Steinmetz, R P Kostyuchenko, A K Dondua, Detlev Arendt, Charles E. Cook, Michael AkamAbstract:The bilaterian animals are divided into three great branches: the Deuterostomia, Ecdysozoa, and Lophotrochozoa. The evolution of developmental mechanisms is less studied in the Lophotrochozoa than in the other two clades. We have studied the expression of Hox genes during larval development of two lophotrochozoans, the polychaete annelids Nereis virens and Platynereis dumerilii. As reported previously, the Hox cluster of N. virens consists of at least 11 genes (de Rosa R, Grenier JK, Andreeva T, Cook CE, Adoutte A, Akam M, Carroll SB, Balavoine G, Nature, 399:772–776, 1999; Andreeva TF, Cook C, Korchagina NM, Akam M, Dondua AK, Ontogenez 32:225–233, 2001); we have also cloned nine Hox genes of P. dumerilii. Hox genes are mainly expressed in the descendants of the 2d blastomere, which form the integument of segments, ventral neural ganglia, pre-pygidial growth zone, and the pygidial lobe. Patterns of expression are similar for orthologous genes of both Nereids. In Nereis, Hox2, and Hox3 are activated before the blastopore closure, while Hox1 and Hox4 are activated just after this. Hox5 and Post2 are first active during the metatrochophore stage, and Hox7, Lox4, and Lox2 at the late nectochaete stage only. During larval stages, Hox genes are expressed in staggered domains in the developing segments and pygidial lobe. The pattern of expression of Hox cluster genes suggests their involvement in the vectorial regionalization of the larval body along the antero-posterior axis. Hox gene expression in Nereids conforms to the canonical patterns postulated for the two other evolutionary branches of the Bilateria, the Ecdysozoa and the Deuterostomia, thus supporting the evolutionary conservatism of the function of Hox genes in development.
G Miron - One of the best experts on this subject based on the ideXlab platform.
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Factors influencing the distribution of Nereid polychaetes: the sulfide aspect
Marine Ecology Progress Series, 1993Co-Authors: G Miron, E KristensenAbstract:A study of the spatial distribution of 3 species of Nereid polychaetes (Nereis wrens N d~verslcolorand N succjnea) was conducted during fall 1991 in Danish estuarine waters Results from fleld data (Kertemlnde Fjord/Kertlnge Nor and Norsminde Fiord) suggested that pore water sulfide (HS-) acts on the dlstnbution of these species N virens was conflned to low-sulfidic areas (
-
factors influencing the distribution of Nereid polychaetes the sulfide aspect
Marine Ecology Progress Series, 1993Co-Authors: G Miron, E KristensenAbstract:A study of the spatial distribution of 3 species of Nereid polychaetes (Nereis wrens N d~verslcolorand N succjnea) was conducted during fall 1991 in Danish estuarine waters Results from fleld data (Kertemlnde Fjord/Kertlnge Nor and Norsminde Fiord) suggested that pore water sulfide (HS-) acts on the dlstnbution of these species N virens was conflned to low-sulfidic areas (<50 uM) while N succ~nea was found in hlgh-sulfldic sedlnlents (from 50 to 2000 PM) N diverslcolor on the other hand, showed a broader distrlbutlon w ~ t h respect to pore water sulflde Complementary tank experiments Indicated that all 3 specles preferred non-sulfid~c sediments In allopatry, whereas N diversicolor was excluded from the non-sulfldlc compartment of tanks In sympatry with each of the other 2 species Mortality rates Indicated that N virens was the least sulfide-tolerant species whereas the other species showed some sort of adaptation with respect to pore water sulfide Tank expenments and coexistence coefficients from field data indicated that interspecific competltlon IS an important determinant of Nereid dlstnbution patterns particularly for populations of N diversicolor Field data and results from laboratory tank experiments suggest that N succlnea is closely associated wlth mussel beds
-
Behavioural response of three Nereid polychaetes to injection of sulfide inside burrows
Marine Ecology Progress Series, 1993Co-Authors: G Miron, E KristensenAbstract:The behavioural response (ventilation rate, duration of ventilation bursts, length of pauses between ventilation bursts) of 3 closely related Nereid polychaetes (Nereis virens, N. diversicolor and N. succinea) to various levels of sulfide exposure was investigated during spring and summer of 1992. The response to HSwas species specific. N. virens reacted strongly to HSby increasing the duration of ventilation bursts. Duration of rest periods was affected less severely while ventilation fa~led to show any significant vanation. The behavioural response of N. diversicolor did not show much variation under HSexposure. The only significant response was a decreased duration of rest periods at high HSconcentration. The type of reaction displayed by N. succinea was similar to the response of N. virens, although less pronounced. N. diversicolor removed most HSfrom the burrow in less than 10 rnin due to the generally high ventilation rate of this species. The slow removal of H S by the other 2 species is caused by a slower response and lower ventilation rate. The shape of the H S efflux curve indicated that changes in the response during exposure are important in N. virens and substantiate a possible toxic effect of HSN. diversicolor displayed the fastest recuperation following HSexposure (restored ventilation behaviour). For all species, time of recuperation increased with increasing sulfide concentration.