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Cíntia Aparecida De Jesus Pereira - One of the best experts on this subject based on the ideXlab platform.
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Identification of a phenoloxidase- and melanin-dependent defence mechanism in Achatina fulica infected with Angiostrongylus vasorum
Parasites & Vectors, 2018Co-Authors: Aytube Lucas Coaglio, Mônica Alves Neves Diniz Ferreira, Walter Dos Santos Lima, Cíntia Aparecida De Jesus PereiraAbstract:Background Angiostrongylus vasorum has different freshwater aquatic and terrestrial gastropod Molluscs as an intermediate host, e.g. Arion spp. The Mollusc Achatina fulica is a danger to public health, given the large diversity of nematodes utilizing it as an intermediate host, such as the parasites of the genus Angiostrongylus , of importance in human and veterinary medicine. Achatina fulica has been shown to have an excellent capacity for maintaining outbreaks and natural infections with A. cantonensis in Asia. Within the Mollusc, the nematode parasites activate haemocytes and/or haemolymph factors and in some invertebrates, phenoloxidase (PO), that induces the release of toxic elements and eliminates the parasites. Despite the importance of A. fulica in the life-cycle of nematodes, little is known regarding the defence mechanisms involving PO in Molluscs infected with nematodes. Here, the presence of PO and nitric oxide (NO) in the haemolymph and haemocytes of A. fulica infected with first-stage (L1) larvae of Angiostrongylus vasorum was evaluated, together with the presence of melanin in the cephalopod Mollusc tissue. Results An increase in PO at one day post infection (dpi), in comparison with the control using the substrates L-tyrosine ( F _(4,90) = 6.73, P = 0.00006), L-DOPA ( F _(4,90) = 22.67, P = 0.02) and p-phenylenediamine (PPD) ( F _(4,90) = 27.58, P = 0.0019), was observed. PO increase coincided with the presence of melanin in the cephalopodal tissue. At 8 dpi, PO activity, compared to L-DOPA ( F _(4,90) = 22.67, P = 0.00002) and PPD ( F _(4,90) = 27.58, P = 0.079) decreased, while melanin increased. At 13 dpi, PO decreased with PPD ( F _(4,90) = 27.58, P = 0.000015) and also the amount of melanin observed in histology. At 30 dpi, PO increased along with the substrates L-DOPA and PPD, while melanin decreased. NO levels increased until 8 dpi, and decreased after 13 dpi. Conclusions To our knowledge, this is the first study that illustrates PO activity in a helminth-infected A. fulica and provides the first observation of an L-tyrosine dependent PO activity in Molluscs infected with A. vasorum . This work suggests that PO pathway may help to control A. vasorum infection in A. fulica .
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Identification of a phenoloxidase- and melanin-dependent defence mechanism in Achatina fulica infected with Angiostrongylus vasorum.
Parasites & vectors, 2018Co-Authors: Aytube Lucas Coaglio, Mônica Alves Neves Diniz Ferreira, Walter Dos Santos Lima, Cíntia Aparecida De Jesus PereiraAbstract:Angiostrongylus vasorum has different freshwater aquatic and terrestrial gastropod Molluscs as an intermediate host, e.g. Arion spp. The Mollusc Achatina fulica is a danger to public health, given the large diversity of nematodes utilizing it as an intermediate host, such as the parasites of the genus Angiostrongylus, of importance in human and veterinary medicine. Achatina fulica has been shown to have an excellent capacity for maintaining outbreaks and natural infections with A. cantonensis in Asia. Within the Mollusc, the nematode parasites activate haemocytes and/or haemolymph factors and in some invertebrates, phenoloxidase (PO), that induces the release of toxic elements and eliminates the parasites. Despite the importance of A. fulica in the life-cycle of nematodes, little is known regarding the defence mechanisms involving PO in Molluscs infected with nematodes. Here, the presence of PO and nitric oxide (NO) in the haemolymph and haemocytes of A. fulica infected with first-stage (L1) larvae of Angiostrongylus vasorum was evaluated, together with the presence of melanin in the cephalopod Mollusc tissue. An increase in PO at one day post infection (dpi), in comparison with the control using the substrates L-tyrosine (F(4,90) = 6.73, P = 0.00006), L-DOPA (F(4,90) = 22.67, P = 0.02) and p-phenylenediamine (PPD) (F(4,90) = 27.58, P = 0.0019), was observed. PO increase coincided with the presence of melanin in the cephalopodal tissue. At 8 dpi, PO activity, compared to L-DOPA (F(4,90) = 22.67, P = 0.00002) and PPD (F(4,90) = 27.58, P = 0.079) decreased, while melanin increased. At 13 dpi, PO decreased with PPD (F(4,90) = 27.58, P = 0.000015) and also the amount of melanin observed in histology. At 30 dpi, PO increased along with the substrates L-DOPA and PPD, while melanin decreased. NO levels increased until 8 dpi, and decreased after 13 dpi. To our knowledge, this is the first study that illustrates PO activity in a helminth-infected A. fulica and provides the first observation of an L-tyrosine dependent PO activity in Molluscs infected with A. vasorum. This work suggests that PO pathway may help to control A. vasorum infection in A. fulica.
J. A. Lindley - One of the best experts on this subject based on the ideXlab platform.
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Climate‐induced effects on the meroplankton and the benthic‐pelagic ecology of the North Sea
Limnology and Oceanography, 2008Co-Authors: Richard R Kirby, Gregory Beaugrand, J. A. LindleyAbstract:Analyses of long-term time series of North Sea plankton and sea surface temperature (SST) data reveal that the annual planktonic larval abundance of three benthic phyla, Echinodermata, Arthropoda, and Mollusca, responds positively and immediately to SST. Long-term outcomes for the planktonic abundance of these three phyla are different, however. The planktonic larvae of echinoderms and decapod crustaceans have increased in abundance from 1958 to 2005, and especially since the mid-1980s, as North Sea SST has increased. In contrast, the abundance of bivalve Mollusc larvae has declined, despite the positive year-to-year relationship between temperature and bivalve larval abundance continuing to hold. We argue that the changes in meroplankton abundance, coincident with increased phytoplankton and declining holoplankton, reflect the synchronous effect of rising SST and related changes in the pelagic community on the reproduction and recruitment of many benthic marine invertebrates. Under this scenario, the long-term decline in bivalve Mollusc larvae will reflect increased predation on the settled larvae and adults by benthic decapods. These alterations in the zooplankton may therefore describe an ecosystem-wide restructuring of North Sea trophic interactions.
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climate induced effects on the meroplankton and the benthic pelagic ecology of the north sea
Limnology and Oceanography, 2008Co-Authors: Richard R Kirby, Gregory Beaugrand, J. A. LindleyAbstract:Analyses of long-term time series of North Sea plankton and sea surface temperature (SST) data reveal that the annual planktonic larval abundance of three benthic phyla, Echinodermata, Arthropoda, and Mollusca, responds positively and immediately to SST. Long-term outcomes for the planktonic abundance of these three phyla are different, however. The planktonic larvae of echinoderms and decapod crustaceans have increased in abundance from 1958 to 2005, and especially since the mid-1980s, as North Sea SST has increased. In contrast, the abundance of bivalve Mollusc larvae has declined, despite the positive year-to-year relationship between temperature and bivalve larval abundance continuing to hold. We argue that the changes in meroplankton abundance, coincident with increased phytoplankton and declining holoplankton, reflect the synchronous effect of rising SST and related changes in the pelagic community on the reproduction and recruitment of many benthic marine invertebrates. Under this scenario, the long-term decline in bivalve Mollusc larvae will reflect increased predation on the settled larvae and adults by benthic decapods. These alterations in the zooplankton may therefore describe an ecosystem-wide restructuring of North Sea trophic interactions.
Aytube Lucas Coaglio - One of the best experts on this subject based on the ideXlab platform.
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Identification of a phenoloxidase- and melanin-dependent defence mechanism in Achatina fulica infected with Angiostrongylus vasorum
Parasites & Vectors, 2018Co-Authors: Aytube Lucas Coaglio, Mônica Alves Neves Diniz Ferreira, Walter Dos Santos Lima, Cíntia Aparecida De Jesus PereiraAbstract:Background Angiostrongylus vasorum has different freshwater aquatic and terrestrial gastropod Molluscs as an intermediate host, e.g. Arion spp. The Mollusc Achatina fulica is a danger to public health, given the large diversity of nematodes utilizing it as an intermediate host, such as the parasites of the genus Angiostrongylus , of importance in human and veterinary medicine. Achatina fulica has been shown to have an excellent capacity for maintaining outbreaks and natural infections with A. cantonensis in Asia. Within the Mollusc, the nematode parasites activate haemocytes and/or haemolymph factors and in some invertebrates, phenoloxidase (PO), that induces the release of toxic elements and eliminates the parasites. Despite the importance of A. fulica in the life-cycle of nematodes, little is known regarding the defence mechanisms involving PO in Molluscs infected with nematodes. Here, the presence of PO and nitric oxide (NO) in the haemolymph and haemocytes of A. fulica infected with first-stage (L1) larvae of Angiostrongylus vasorum was evaluated, together with the presence of melanin in the cephalopod Mollusc tissue. Results An increase in PO at one day post infection (dpi), in comparison with the control using the substrates L-tyrosine ( F _(4,90) = 6.73, P = 0.00006), L-DOPA ( F _(4,90) = 22.67, P = 0.02) and p-phenylenediamine (PPD) ( F _(4,90) = 27.58, P = 0.0019), was observed. PO increase coincided with the presence of melanin in the cephalopodal tissue. At 8 dpi, PO activity, compared to L-DOPA ( F _(4,90) = 22.67, P = 0.00002) and PPD ( F _(4,90) = 27.58, P = 0.079) decreased, while melanin increased. At 13 dpi, PO decreased with PPD ( F _(4,90) = 27.58, P = 0.000015) and also the amount of melanin observed in histology. At 30 dpi, PO increased along with the substrates L-DOPA and PPD, while melanin decreased. NO levels increased until 8 dpi, and decreased after 13 dpi. Conclusions To our knowledge, this is the first study that illustrates PO activity in a helminth-infected A. fulica and provides the first observation of an L-tyrosine dependent PO activity in Molluscs infected with A. vasorum . This work suggests that PO pathway may help to control A. vasorum infection in A. fulica .
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Identification of a phenoloxidase- and melanin-dependent defence mechanism in Achatina fulica infected with Angiostrongylus vasorum.
Parasites & vectors, 2018Co-Authors: Aytube Lucas Coaglio, Mônica Alves Neves Diniz Ferreira, Walter Dos Santos Lima, Cíntia Aparecida De Jesus PereiraAbstract:Angiostrongylus vasorum has different freshwater aquatic and terrestrial gastropod Molluscs as an intermediate host, e.g. Arion spp. The Mollusc Achatina fulica is a danger to public health, given the large diversity of nematodes utilizing it as an intermediate host, such as the parasites of the genus Angiostrongylus, of importance in human and veterinary medicine. Achatina fulica has been shown to have an excellent capacity for maintaining outbreaks and natural infections with A. cantonensis in Asia. Within the Mollusc, the nematode parasites activate haemocytes and/or haemolymph factors and in some invertebrates, phenoloxidase (PO), that induces the release of toxic elements and eliminates the parasites. Despite the importance of A. fulica in the life-cycle of nematodes, little is known regarding the defence mechanisms involving PO in Molluscs infected with nematodes. Here, the presence of PO and nitric oxide (NO) in the haemolymph and haemocytes of A. fulica infected with first-stage (L1) larvae of Angiostrongylus vasorum was evaluated, together with the presence of melanin in the cephalopod Mollusc tissue. An increase in PO at one day post infection (dpi), in comparison with the control using the substrates L-tyrosine (F(4,90) = 6.73, P = 0.00006), L-DOPA (F(4,90) = 22.67, P = 0.02) and p-phenylenediamine (PPD) (F(4,90) = 27.58, P = 0.0019), was observed. PO increase coincided with the presence of melanin in the cephalopodal tissue. At 8 dpi, PO activity, compared to L-DOPA (F(4,90) = 22.67, P = 0.00002) and PPD (F(4,90) = 27.58, P = 0.079) decreased, while melanin increased. At 13 dpi, PO decreased with PPD (F(4,90) = 27.58, P = 0.000015) and also the amount of melanin observed in histology. At 30 dpi, PO increased along with the substrates L-DOPA and PPD, while melanin decreased. NO levels increased until 8 dpi, and decreased after 13 dpi. To our knowledge, this is the first study that illustrates PO activity in a helminth-infected A. fulica and provides the first observation of an L-tyrosine dependent PO activity in Molluscs infected with A. vasorum. This work suggests that PO pathway may help to control A. vasorum infection in A. fulica.
Richard R Kirby - One of the best experts on this subject based on the ideXlab platform.
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Climate‐induced effects on the meroplankton and the benthic‐pelagic ecology of the North Sea
Limnology and Oceanography, 2008Co-Authors: Richard R Kirby, Gregory Beaugrand, J. A. LindleyAbstract:Analyses of long-term time series of North Sea plankton and sea surface temperature (SST) data reveal that the annual planktonic larval abundance of three benthic phyla, Echinodermata, Arthropoda, and Mollusca, responds positively and immediately to SST. Long-term outcomes for the planktonic abundance of these three phyla are different, however. The planktonic larvae of echinoderms and decapod crustaceans have increased in abundance from 1958 to 2005, and especially since the mid-1980s, as North Sea SST has increased. In contrast, the abundance of bivalve Mollusc larvae has declined, despite the positive year-to-year relationship between temperature and bivalve larval abundance continuing to hold. We argue that the changes in meroplankton abundance, coincident with increased phytoplankton and declining holoplankton, reflect the synchronous effect of rising SST and related changes in the pelagic community on the reproduction and recruitment of many benthic marine invertebrates. Under this scenario, the long-term decline in bivalve Mollusc larvae will reflect increased predation on the settled larvae and adults by benthic decapods. These alterations in the zooplankton may therefore describe an ecosystem-wide restructuring of North Sea trophic interactions.
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climate induced effects on the meroplankton and the benthic pelagic ecology of the north sea
Limnology and Oceanography, 2008Co-Authors: Richard R Kirby, Gregory Beaugrand, J. A. LindleyAbstract:Analyses of long-term time series of North Sea plankton and sea surface temperature (SST) data reveal that the annual planktonic larval abundance of three benthic phyla, Echinodermata, Arthropoda, and Mollusca, responds positively and immediately to SST. Long-term outcomes for the planktonic abundance of these three phyla are different, however. The planktonic larvae of echinoderms and decapod crustaceans have increased in abundance from 1958 to 2005, and especially since the mid-1980s, as North Sea SST has increased. In contrast, the abundance of bivalve Mollusc larvae has declined, despite the positive year-to-year relationship between temperature and bivalve larval abundance continuing to hold. We argue that the changes in meroplankton abundance, coincident with increased phytoplankton and declining holoplankton, reflect the synchronous effect of rising SST and related changes in the pelagic community on the reproduction and recruitment of many benthic marine invertebrates. Under this scenario, the long-term decline in bivalve Mollusc larvae will reflect increased predation on the settled larvae and adults by benthic decapods. These alterations in the zooplankton may therefore describe an ecosystem-wide restructuring of North Sea trophic interactions.
Mônica Alves Neves Diniz Ferreira - One of the best experts on this subject based on the ideXlab platform.
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Identification of a phenoloxidase- and melanin-dependent defence mechanism in Achatina fulica infected with Angiostrongylus vasorum
Parasites & Vectors, 2018Co-Authors: Aytube Lucas Coaglio, Mônica Alves Neves Diniz Ferreira, Walter Dos Santos Lima, Cíntia Aparecida De Jesus PereiraAbstract:Background Angiostrongylus vasorum has different freshwater aquatic and terrestrial gastropod Molluscs as an intermediate host, e.g. Arion spp. The Mollusc Achatina fulica is a danger to public health, given the large diversity of nematodes utilizing it as an intermediate host, such as the parasites of the genus Angiostrongylus , of importance in human and veterinary medicine. Achatina fulica has been shown to have an excellent capacity for maintaining outbreaks and natural infections with A. cantonensis in Asia. Within the Mollusc, the nematode parasites activate haemocytes and/or haemolymph factors and in some invertebrates, phenoloxidase (PO), that induces the release of toxic elements and eliminates the parasites. Despite the importance of A. fulica in the life-cycle of nematodes, little is known regarding the defence mechanisms involving PO in Molluscs infected with nematodes. Here, the presence of PO and nitric oxide (NO) in the haemolymph and haemocytes of A. fulica infected with first-stage (L1) larvae of Angiostrongylus vasorum was evaluated, together with the presence of melanin in the cephalopod Mollusc tissue. Results An increase in PO at one day post infection (dpi), in comparison with the control using the substrates L-tyrosine ( F _(4,90) = 6.73, P = 0.00006), L-DOPA ( F _(4,90) = 22.67, P = 0.02) and p-phenylenediamine (PPD) ( F _(4,90) = 27.58, P = 0.0019), was observed. PO increase coincided with the presence of melanin in the cephalopodal tissue. At 8 dpi, PO activity, compared to L-DOPA ( F _(4,90) = 22.67, P = 0.00002) and PPD ( F _(4,90) = 27.58, P = 0.079) decreased, while melanin increased. At 13 dpi, PO decreased with PPD ( F _(4,90) = 27.58, P = 0.000015) and also the amount of melanin observed in histology. At 30 dpi, PO increased along with the substrates L-DOPA and PPD, while melanin decreased. NO levels increased until 8 dpi, and decreased after 13 dpi. Conclusions To our knowledge, this is the first study that illustrates PO activity in a helminth-infected A. fulica and provides the first observation of an L-tyrosine dependent PO activity in Molluscs infected with A. vasorum . This work suggests that PO pathway may help to control A. vasorum infection in A. fulica .
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Identification of a phenoloxidase- and melanin-dependent defence mechanism in Achatina fulica infected with Angiostrongylus vasorum.
Parasites & vectors, 2018Co-Authors: Aytube Lucas Coaglio, Mônica Alves Neves Diniz Ferreira, Walter Dos Santos Lima, Cíntia Aparecida De Jesus PereiraAbstract:Angiostrongylus vasorum has different freshwater aquatic and terrestrial gastropod Molluscs as an intermediate host, e.g. Arion spp. The Mollusc Achatina fulica is a danger to public health, given the large diversity of nematodes utilizing it as an intermediate host, such as the parasites of the genus Angiostrongylus, of importance in human and veterinary medicine. Achatina fulica has been shown to have an excellent capacity for maintaining outbreaks and natural infections with A. cantonensis in Asia. Within the Mollusc, the nematode parasites activate haemocytes and/or haemolymph factors and in some invertebrates, phenoloxidase (PO), that induces the release of toxic elements and eliminates the parasites. Despite the importance of A. fulica in the life-cycle of nematodes, little is known regarding the defence mechanisms involving PO in Molluscs infected with nematodes. Here, the presence of PO and nitric oxide (NO) in the haemolymph and haemocytes of A. fulica infected with first-stage (L1) larvae of Angiostrongylus vasorum was evaluated, together with the presence of melanin in the cephalopod Mollusc tissue. An increase in PO at one day post infection (dpi), in comparison with the control using the substrates L-tyrosine (F(4,90) = 6.73, P = 0.00006), L-DOPA (F(4,90) = 22.67, P = 0.02) and p-phenylenediamine (PPD) (F(4,90) = 27.58, P = 0.0019), was observed. PO increase coincided with the presence of melanin in the cephalopodal tissue. At 8 dpi, PO activity, compared to L-DOPA (F(4,90) = 22.67, P = 0.00002) and PPD (F(4,90) = 27.58, P = 0.079) decreased, while melanin increased. At 13 dpi, PO decreased with PPD (F(4,90) = 27.58, P = 0.000015) and also the amount of melanin observed in histology. At 30 dpi, PO increased along with the substrates L-DOPA and PPD, while melanin decreased. NO levels increased until 8 dpi, and decreased after 13 dpi. To our knowledge, this is the first study that illustrates PO activity in a helminth-infected A. fulica and provides the first observation of an L-tyrosine dependent PO activity in Molluscs infected with A. vasorum. This work suggests that PO pathway may help to control A. vasorum infection in A. fulica.
