Gene expression profiles at different stages for formation of pearl sac and pearl in the pearl oyster Pinctada fucata.
Animal Shells
/ growth & development
Animals
Aquaculture
Carbonic Anhydrases
/ genetics
Gene Expression Profiling
/ veterinary
Gene Expression Regulation, Developmental
Metabolic Networks and Pathways
Molecular Sequence Annotation
Pinctada
/ genetics
Principal Component Analysis
Sequence Analysis, RNA
/ veterinary
Different stages
Gene expression
Pearl
Pearl sac
Pinctada fucata
Journal
BMC genomics
ISSN: 1471-2164
Titre abrégé: BMC Genomics
Pays: England
ID NLM: 100965258
Informations de publication
Date de publication:
25 Mar 2019
25 Mar 2019
Historique:
received:
27
09
2018
accepted:
01
03
2019
entrez:
27
3
2019
pubmed:
27
3
2019
medline:
13
7
2019
Statut:
epublish
Résumé
The most critical step in the pearl formation during aquaculture is issued to the proliferation and differentiation of outer epithelial cells of mantle graft into pearl sac. This pearl sac secretes various matrix proteins to produce pearls by a complex physiological process which has not been well-understood yet. Here, we aimed to unravel the genes involved in the development of pearl sac and pearl, and the sequential expression patterns of different shell matrix proteins secreted from the pearl sac during pearl formation by pearl oyster Pinctada fucata using high-throughput transcriptome profiling. Principal component analysis (PCA) showed clearly different gene expression profiles between earlier (before 1 week) and later stages (1 week to 3 months) of grafting. Immune-related genes were highly expressed between 0 h - 24 h (donor dependent) and 48 h - 1 w (host dependent), and in the course of wound healing process pearl sac was developed by two weeks of graft transplantation. Moreover, for the first time, we identified some stem cell marker genes including ABCG2, SOX2, MEF2A, HES1, MET, NRP1, ESR1, STAT6, PAX2, FZD1 and PROM1 that were expressed differentially during the formation of pearl sac. The expression profiling of 192 biomineralization-related genes demonstrated that most of the shell matrix proteins (SMPs) involved in prismatic layer formation were first up-regulated and then gradually down-regulated indicating their involvement in the development of pearl sac and the onset of pearl mineralization. Most of the nacreous layer forming SMPs were up-regulated at 2 weeks after the maturation of pearl sac. Nacrein, MSI7 and shematrin involved in both layer formation were highly expressed during 0 h - 24 h, down-regulated up to 1 week and then up-regulated again after accomplishment of pearl sac formation. Using an RNA-seq approach we unraveled the expression pattern of the key genes involved in the development of pearl sac and pearl as a result of host immune response after grafting. These findings provide valuable information in understanding the molecular mechanism of pearl formation and immune response in P. fucata.
Sections du résumé
BACKGROUND
BACKGROUND
The most critical step in the pearl formation during aquaculture is issued to the proliferation and differentiation of outer epithelial cells of mantle graft into pearl sac. This pearl sac secretes various matrix proteins to produce pearls by a complex physiological process which has not been well-understood yet. Here, we aimed to unravel the genes involved in the development of pearl sac and pearl, and the sequential expression patterns of different shell matrix proteins secreted from the pearl sac during pearl formation by pearl oyster Pinctada fucata using high-throughput transcriptome profiling.
RESULTS
RESULTS
Principal component analysis (PCA) showed clearly different gene expression profiles between earlier (before 1 week) and later stages (1 week to 3 months) of grafting. Immune-related genes were highly expressed between 0 h - 24 h (donor dependent) and 48 h - 1 w (host dependent), and in the course of wound healing process pearl sac was developed by two weeks of graft transplantation. Moreover, for the first time, we identified some stem cell marker genes including ABCG2, SOX2, MEF2A, HES1, MET, NRP1, ESR1, STAT6, PAX2, FZD1 and PROM1 that were expressed differentially during the formation of pearl sac. The expression profiling of 192 biomineralization-related genes demonstrated that most of the shell matrix proteins (SMPs) involved in prismatic layer formation were first up-regulated and then gradually down-regulated indicating their involvement in the development of pearl sac and the onset of pearl mineralization. Most of the nacreous layer forming SMPs were up-regulated at 2 weeks after the maturation of pearl sac. Nacrein, MSI7 and shematrin involved in both layer formation were highly expressed during 0 h - 24 h, down-regulated up to 1 week and then up-regulated again after accomplishment of pearl sac formation.
CONCLUSIONS
CONCLUSIONS
Using an RNA-seq approach we unraveled the expression pattern of the key genes involved in the development of pearl sac and pearl as a result of host immune response after grafting. These findings provide valuable information in understanding the molecular mechanism of pearl formation and immune response in P. fucata.
Identifiants
pubmed: 30909870
doi: 10.1186/s12864-019-5579-3
pii: 10.1186/s12864-019-5579-3
pmc: PMC6434816
doi:
Substances chimiques
nacrein
EC 4.2.1.-
Carbonic Anhydrases
EC 4.2.1.1
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
240Subventions
Organisme : Japan Society for the Promotion of Science
ID : JP17835220
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