Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Secretome analysis revealed amylases and peroxidases as markers of the early stages of somatic embryogenesis in Pinus nigra

ABSTRACT: Micropropagation of valuable conifer trees via somatic embryogenesis is efficient for rapid multiplication and preservation of germplasm. Suspension cell cultures are valuable tools to study extracellular proteins secreted into liquid cultivation medium, avoiding contamination from destructured cells. Extracellular proteins are essential regulators of somatic embryogenesis. Using a proteomic approach, we performed a pioneering study of the secretome of Pinus nigra cell lines with contrasting embryogenic capacity, accounting for variability between genotypes. Besides proteins affecting cell wall strength, such as four peroxidases and extensin, amylase and two basic secretory proteins accumulated in the medium from cell lines with high embryogenic capacity. In the medium of cell lines with low embryogenic capacity nuclease S1 and proteases were more abundant. These proteins are potentially involved in programmed cell death and nutrient recycling. Furthermore, two polygalacturonases and expansin correlated with microscopic observations. Validating proteomic findings, we tested the peroxidase and amylase activity in the medium of several cell lines. We concluded that both tested enzyme activities may be considered potential markers of high embryogenic capacity.

INSTRUMENT(S): LTQ Orbitrap Elite

ORGANISM(S): Pinus Nigra

TISSUE(S): Plant Cell, Cell Suspension Culture

DISEASE(S): Disease Free

SUBMITTER: Maksym Danchenko

LAB HEAD: Peter Baráth

PROVIDER: PXD040247 | Pride | 2023-07-28

REPOSITORIES: Pride

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
	150924_ptaeda.v1.01.proteins_annot_V2.fasta	Fasta
	190909_Maksym_489_A_01_S1.raw	Raw
	190909_Maksym_489_A_02_S1.raw	Raw
	190909_Maksym_489_B_01_S2.raw	Raw
	190909_Maksym_489_B_02_S2.raw	Raw

Items per page:

1 - 5 of 22

Similar Datasets

Epigenetic regulation of the homeobox gene MSX1 associates with platinum resistant disease in high grade serous epithelial ovarian cancer

Project description:Introduction: Although High Grade Serous Ovarian Cancer (HGSOC) is considered a chemo-responsive disease, a proportion of patients do not respond to platinum-based chemotherapy at presentation or have progression-free survival of <6 months. Validated biomarkers of lack of response would enable alternative treatment stratification for these patients and identify novel mechanisms of resistance. Methods: Differential DNA methylation was investigated in independent tumour sets using Illumina 27K HumanMethylation arrays and validated by bisulphite pyrosequencing. Gene expression was by Affymetrix arrays and qRT-PCR. The role of Msh homeobox 1 (MSX1) in drug sensitivity was investigated by gene reintroduction into ovarian cancer cell lines. Results: CpG sites at contiguous genomic locations within the MSX1 gene have significantly lower levels of methylation in HGSOC which recur by 6 months compared to after 12 months and/or with RECIST response (p<0.05, q<0.05). A decrease in methylation at these intragenic CpG sites was significantly correlated with decreased MSX1 gene expression. Low expression of MSX1 was associated with poor progression-free survival independent of known clinical prognostic features (p=0.014). Three mutant or wild-type TP53 expressing ovarian cancer cell lines, resistant to cisplatin, have reduced MSX1 expression compared to matched parental, platinum sensitive, lines. Re-expression of MSX1 in resistant lines led to cisplatin sensitisation, increased apoptosis, increased p21 and BAX expression. However, in two TP53-null cell lines, MSX1 failed to change cisplatin sensitivity. Conclusion: Hypomethylation of MSX1 is a biomarker of resistant HGSOC disease at presentation and identifies a novel mechanism of platinum drug resistance. Bisulphite converted DNA from the 86 samples were hybridised to the Illumina Infinium 27k Human Methylation Beadchip v1.2

2015-11-26 | E-GEOD-75414 | biostudies-arrayexpress

Candida utilis as a protein source for Atlantic salmon

Project description:Single cell proteins, such as Candida utilis, are known to have immunomodulating effects in the distal intestine (DI) of Atlantic salmon, whereas soybean meal (SBM) can cause soybean meal induce enteritis (SBMIE). Inflammatory or immunomodulatory stimuli at the local level in the intestine may alter the plasma protein profile of Atlantic salmon. These changes can be helpful tools in diagnosis for fish diseases and indicators for fish health. The present work aimed to identify local intestinal tissue responses and changes in plasma protein profiles of Atlantic salmon fed C. utilis yeast, SBM, or combined diets. Fish meal (FM) based diet was used as a control diet and the six experimental diets were: FM diet with 200 g/kg C. utilis (FM200CU) and five diets containing 200 g/kg SBM together with 0 (SBM group), 25, 50, 100 or 200 g/kg C. utilis (SBM25CU, SBM50CU, SBM100CU and SBM200CU groups, respectively). Intestine morphology of fish fed FM200CU where not affected whereas SBM group presented changes characteristic of SBMIE. Low inclusion of C. utilis in SBM diet showed a modulation of immune cell populations, but did not alleviate inflammatory symptom.

2020-05-18 | PXD012051 | Pride

Streptococcus suis, LC-MSMS, EGCG

Project description:EGCG effect proteomic profiles of Streptococcus suis

2022-10-14 | PXD026047 | Pride

Somatic embryogenesis of Pinus nigra

Project description:There are several issues complicating somatic embryogenesis in conifers, for instance the low initiation frequency, the weak maturation capacity, and the loss of an embryogenic potential after a prolonged cultivation. The aim of our study was to clarify molecular details of the this process in the tree Pinus nigra Arn. We performed comparative proteomic analysis based on the two-dimensional gel electrophoresis in 2 genotypes coded 362 and 366 of: 1) proliferating embryogenic tissues (E) initiated from immature zygotic embryos, 2) non-embryogenic calli (NEC) started from cotyledons of somatic seedlings, 3) embryogenic tissues that lost the maturation capacity (E-L). Pine tissues showed distinct morphologic features: a) E362 and E366 were characterized by the presence of early bipolar structures capable of maturation and plantlet regeneration; b) NEC362 and NEC366 were composed of round shaped cells without any organisation; c) for E-L362 and E-L366 the long-term culture of initially embryogenic tissues resulted in the disorganisation of early bipolar structures. We found 24 differentially accumulated protein spots common for both genotypes after comparison of E versus NEC.

2017-09-06 | PXD004611 | Pride

Deciphering microRNAs and other small RNAs during the transition of dormant embryo into germinated embryo in larch (Larix leptolepis)

Project description:To investigate the roles of sRNAs in keeping embryo dormancy or germination in Larix leptolepis, we deciphered the endogenous "sRNAome" in dormant and germinated embryos. High-throughput sequencing of the sRNA libraries showed that dormant embryos exhibited a length bias towards 24-nt, while germinated embryos showed a bias towards a 21-nt and/or 22-nt length. Both of proportions for miRNAs to the non-redundant and redundant sRNAs were higher in germinated embryos than those in dormant embryos, while the ratio of unknown sRNAs was higher in dormant embryos than in germinated embryos. The proportion of 21-nt and 22-nt sRNAs increased in germinated embryos, which might attribute to the higher expression level of miRNAs. We identified a total of 160 conserved miRNAs from 39 families, 16 novel miRNAs, and 14 plausible miRNA candidates, of which novel and non-conserved known miRNAs might be the main contributors. These findings indicate that larch and possibly other gymnosperms have complex mechanisms of gene regulation involving sRNAs and miRNAs operating transcriptionally and post-transcriptionally during embryo dormancy and germination. One embryogenic cell line of Japanese larch (Larix leptolepis), designated as D878, with a high embryo maturation capacity was used in this study. Embryogenic callus were induced from immature embryos of larch on induction medium, followed by sub-culture, and culture on ABA-containing mature medium in a dark environment at 25 2 C. After cultured 45 days in mature medium, embryogenic calli developed into mature somatic embryos. In our study, the samples were harvested at day 57, one sample was collected after mature embryos continued to stay for 12 days on ABA-containing medium, and the other one was harvested after cultured for 12 days on ABA-removing medium. All samples were snap-frozen in liquid nitrogen, and stored in liquid nitrogen until RNA extraction.

2014-07-19 | E-GEOD-49059 | biostudies-arrayexpress

The regulation of synchronism by abscisic acid-responsive small non-coding RNAs during somatic embryogenesis in larch (Larix leptolepis)

Project description:Small non-coding RNAs (sncRNAs) are emerging as key regulators of embryogenesis. To investigate the roles of sRNAs in regulating synchronism of somatic embryogenesis in Larix leptolepis, we deciphered the endogenous "sRNAome" in synchronous and desynchronous embryos. The 24-nt class sRNAs were overrepresented in both synchronous embryos and desynchronous embryos, accounting for 85.29% and 44.79%. A total of 29 miRNAs were upregulated in synchronous embryos, whereas 59 miRNAs were upregulated in desynchronous embryos. We describe the emerging theme for sncRNAs function: inhibiting the precocious expression, thus regulating the synchronism of somatic embryogenesis. These findings indicate that larch and possibly other gymnosperms have complex mechanisms of gene regulation involving sRNAs and miRNAs operating transcriptionally and post-transcriptionally during the regulation of synchronism. One embryogenic cell line of Japanese larch (Larix leptolepis), designated as D878, with a high embryo maturation capacity was used in this study. Embryogenic callus was induced from immature embryos of Japanese larch on induction medium followed by sub-culture. Calli at the proembryogenic mass III stage were cultured on maturation medium in a dark environment at 25 M-BM-1 2M-BM-0C. Samples were cultured on ABA-plus or ABA-minus maturation medium for 45 days. All samples were snap-frozen in liquid nitrogen, and stored in liquid nitrogen until RNA extraction.

2014-07-19 | E-GEOD-49055 | biostudies-arrayexpress

Transcription profiling of barley embryo-derived tissue from Steptoe x Morex doubled-haploid lines and from the parental cultivars

Project description:We measured mRNA abundance in the embryogenic tissue of 150 recombinant Steptoe x Morex doubled-haploid lines (no replicates) and in parental genotypes, Steptoe and Morex, 3 replicates each, total 156 chips.

2007-04-16 | E-TABM-112 | biostudies-arrayexpress

Repetitive somatic embryogenesis induced cytological and proteomic changes in propagated embryogenic lines of Pseudotsuga menziesii [Mirb.]

Project description:Objectives: to characterize and to better understand changes at the cellular and molecular levels, in embryogenic lines in Douglas-fir obtained after repetitive somatic embryogenesis, that could explain improvement of their embryogenic potential : to primary lines, secondary ones showed an increase of their embryogenic potential; then tertiary lines showed again an improved embryogenic potential compared to second lines. Interestingly, the proteomic analysis further revealed different sets of significant proteins suggesting that each cycle of repetitive somatic embryogenesis is promoting substantial genome-wide rearrangement of the gene expression pattern.

2018-08-15 | PXD008347 | Pride

Alterations in kernel proteome after infection with Fusarium culmorum in two triticale cultivars with contrasting resistance to Fusarium head blight

Project description:Triticale was used as a model to recognize new components of molecular mechanism of resistance to Fusarium head blight (FHB) in cereals. Fusarium-damaged kernels of two lines distinct in levels of resistance to FHB were applied into a proteome profiling using two-dimensional gel electrophoresis (2-DE) to create protein maps and mass spectrometry to identify the proteins differentially accumulated between the analyzed lines. The 2-DE analysis indicated a total of 23 spots with clear differences in a protein content between the more resistant and more susceptible triticale lines after infection with F. culmorum. A majority of the proteins were involved in a cell carbohydrate metabolism, stressing the importance of this protein group in a plant response to Fusarium infection. The increased accumulation levels of different isoforms of plant beta-amylase were observed for a more susceptible triticale line after inoculation. The more resistant line was characterized by a higher abundance of alpha-amylase inhibitor CM2 subunit.

2018-10-27 | PXD004464 | Pride

Integration of metabolomics and transcriptomics to reveal metabolic characteristics and key targets associated with cisplatin resistance in non-small cell lung cancer

Project description:Continuous exposure to cisplatin can induce drug resistance to limit efficacy, however, the underlying mechanisms correlated to cisplatin resistance are still unclear. Drug-sensitive A549 cells and cisplatin-resistant A549/DDP cells were used to explore the potential metabolic pathways and key targets associated with cisplatin resistance by integrating untargeted metabolomics with transcriptomics. The results of comprehensive analyses showed that 19 metabolites were significantly changed in A549/DDP vs A549 cells, and some pathways had a close relationship with cisplatin resistance, such as the biosynthesis of aminoacyl-tRNA, glycerophospholipid metabolism, and glutathione metabolism. Moreover, transcriptomics analysis showed glutathione metabolism was also obviously affected in A549/DDP, which indicated that glutathione metabolism played an import role in the process of drug resistance. Meanwhile, transcriptomics analysis suggested the four enzymes related to glutathione metabolism - CD13, GPX4, RRM2B, and OPLAH - as potential targets of cisplatin resistance in NSCLC. Further studies identified the over-expressions of these four enzymes in A549/DDP. The elucidation of mechanism and discovery of new potential targets may help us have a better understanding of cisplatin resistance.

2019-08-12 | PXD013265 | Pride

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data