16 3E-08 1E-32 2E-06 5E-66 4E-08 1E-13 6E-17 3 3 1 1 1 1 2 1 2 2 1 Unclassified Regulation of cell proliferation, innate immune response Muscle homeostasis, dephosphorylation Cell differentiation Unclassified Unclassified Protein amino acid dephosphorylation Unclassified Unclassified RNA splicing, mRNA processing Unclassified Gene symbol hspb6 idi1 P. annectens accession no. JZ575431 JZ575440 Homolog species Ostertagia ostertagi Danio rerio Evalue 6E-24 1E-04 No of clones 1 1 Biological processes Response to stress, response to heat Lipid biosynthetic processttc11 vmoJZ575509 JZXenopus laevis Rana catesbeiana1E-11 7E-3Apoptosis UnclassifiedMaintenance phase: down-regulation of genes related to complement fixationThe complement system mediates a chain reaction of proteolysis and assembly of protein complexes that results in the elimination of invading microorganisms [37,38]. Three activation pathways (the classical, lectin and alternative pathways) and a lytic pathway regulate these events. Protopterus 1471-2474-14-48 annectens CI-1011 web utilizes lectin pathway for protection against pathogens during the induction phase of aestivation [13]. However, our results showed that many genes related to complement fixation appeared in the reverse library. These included the complement C3 precursor alpha chain (11 clones), complement component 4 binding protein alpha (3 clones) and CD46 antigen complement regulatory protein (2 clones), and seven others (Table 3). Hence, P. annectens might down-regulate the classical complement fixation pathway during the maintenance phase of aestivation, possibly because of three reasons. Firstly, the dried mucus cocoon was already well formed, which conferred the aestivating lungfish a certain degree of protection against external pathogens. Secondly, tissue reconstruction would have subsided after the induction phase, and there could be minimal tissue inflammation during the prolonged maintenance phase. Thirdly, it was important to conserve the limited energy resources, and it would be energetically demanding to sustain the XAV-939 web increased expression of genes involved in complement fixation during the maintenance phase of aestivation.PLOS ONE | DOI:10.1371/journal.pone.0121224 March 30,19 /Differential Gene Expression in the Liver of the African LungfishMaintenance phase: down-regulation of warm-temperature-acclimationrelated 65 kDa protein and hemopexinThe plasma glycoprotein warm-temperature-acclimation-related protein (Wap65) was first identified in the goldfish Carassius auratus [39] and the cDNA showed a homology of 31 to rat hemopexin, a serum glycoprotein that transports heme to liver parenchymal cells [40]. Hemopexins in mammals are mainly synthesized in liver and are responsible for the transportation of heme resulting from hemolysis to the liver. Therefore, the down-regulation of the wap65 and hemopexin in the liver of P. annectens (Table 3) suggested that hemolysis might be suppressed during the jir.2010.0097 maintenance phase of aestivation. There are also indications that the Wap65 can be involved in immune responses in the Channel catfish Ictalurus punctatus [41]. Hence, its down-regulation suggested that a decrease in immune response might have occurred in the liver of P. annectens during the maintenance phase of aestivation.Maintenance phase: down-regulation of genes related to iron metabolismIron is involved in many cellular metabolic pathways and enzymatic reactions, but it is toxic when in excess [42?4]. Transferrin is one of the major s.16 3E-08 1E-32 2E-06 5E-66 4E-08 1E-13 6E-17 3 3 1 1 1 1 2 1 2 2 1 Unclassified Regulation of cell proliferation, innate immune response Muscle homeostasis, dephosphorylation Cell differentiation Unclassified Unclassified Protein amino acid dephosphorylation Unclassified Unclassified RNA splicing, mRNA processing Unclassified Gene symbol hspb6 idi1 P. annectens accession no. JZ575431 JZ575440 Homolog species Ostertagia ostertagi Danio rerio Evalue 6E-24 1E-04 No of clones 1 1 Biological processes Response to stress, response to heat Lipid biosynthetic processttc11 vmoJZ575509 JZXenopus laevis Rana catesbeiana1E-11 7E-3Apoptosis UnclassifiedMaintenance phase: down-regulation of genes related to complement fixationThe complement system mediates a chain reaction of proteolysis and assembly of protein complexes that results in the elimination of invading microorganisms [37,38]. Three activation pathways (the classical, lectin and alternative pathways) and a lytic pathway regulate these events. Protopterus 1471-2474-14-48 annectens utilizes lectin pathway for protection against pathogens during the induction phase of aestivation [13]. However, our results showed that many genes related to complement fixation appeared in the reverse library. These included the complement C3 precursor alpha chain (11 clones), complement component 4 binding protein alpha (3 clones) and CD46 antigen complement regulatory protein (2 clones), and seven others (Table 3). Hence, P. annectens might down-regulate the classical complement fixation pathway during the maintenance phase of aestivation, possibly because of three reasons. Firstly, the dried mucus cocoon was already well formed, which conferred the aestivating lungfish a certain degree of protection against external pathogens. Secondly, tissue reconstruction would have subsided after the induction phase, and there could be minimal tissue inflammation during the prolonged maintenance phase. Thirdly, it was important to conserve the limited energy resources, and it would be energetically demanding to sustain the increased expression of genes involved in complement fixation during the maintenance phase of aestivation.PLOS ONE | DOI:10.1371/journal.pone.0121224 March 30,19 /Differential Gene Expression in the Liver of the African LungfishMaintenance phase: down-regulation of warm-temperature-acclimationrelated 65 kDa protein and hemopexinThe plasma glycoprotein warm-temperature-acclimation-related protein (Wap65) was first identified in the goldfish Carassius auratus [39] and the cDNA showed a homology of 31 to rat hemopexin, a serum glycoprotein that transports heme to liver parenchymal cells [40]. Hemopexins in mammals are mainly synthesized in liver and are responsible for the transportation of heme resulting from hemolysis to the liver. Therefore, the down-regulation of the wap65 and hemopexin in the liver of P. annectens (Table 3) suggested that hemolysis might be suppressed during the jir.2010.0097 maintenance phase of aestivation. There are also indications that the Wap65 can be involved in immune responses in the Channel catfish Ictalurus punctatus [41]. Hence, its down-regulation suggested that a decrease in immune response might have occurred in the liver of P. annectens during the maintenance phase of aestivation.Maintenance phase: down-regulation of genes related to iron metabolismIron is involved in many cellular metabolic pathways and enzymatic reactions, but it is toxic when in excess [42?4]. Transferrin is one of the major s.
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