ABSTRACT: We applied an iTRAQ-based quantitative proteomic approach to compare the protein expressionprofiles of Skeletonema dohrnii grown in lower silicate and temperature conditions.
Project description:We applied an iTRAQ-based quantitative proteomic approach to understand the differential proteome expression of marine diatom Skeletonema dohrnii grown in different temperature and silicate concentration.
Project description:We applied an iTRAQ-based quantitative proteomic approach to compare the protein expression profiles of Thalassiosira pseudonana grown in nutrient-replete, and N-, P- and Si-deficient conditions.
Project description:To understand the molecular basis of heat acclimation, ‘omics’ analyses were performed to compare the differences between CS and HTAS female adults at proteomic levels.
Project description:In our study, differential male nucleus events and development behaviors were revealed from the fertilized eggs in response to the sperm from males of genotypic sex determination (GSD) and temperature-dependent sex determination (TSD) in gibel carp. When the eggs of maternal fish were fertilized by the sperm from males of GSD, the fertilized egg encountered similar sexual reproduction events and behaviors. However, when the eggs of maternal fish were fertilized by the sperm from males of TSD, a typical process of gynogenesis was observed. To reveal the underlying molecular mechanism of differential sperm nucleus development behaviors in the fertilized eggs, iTRAQ-based quantitative semen proteomics were performed on three semen samples from three males of GSD and three semen samples from three males of TSD respectively.
Project description:Transplantation is currently the best treatment option for end-stage renal disease (ESRD) patients. However, acute rejection (AR) is the main source of failure in renal transplantation. The current gold standard for diagnosis of AR involves renal biopsy, but it is invasive, time consuming, costly and inconvenient. Sensitive and less invasive detection of AR episodes in renal transplant patients is essential to preserve the allograft function. Here, we applied isobaric tags for relative and absolute quantisation (iTRAQ) mass spectrometry to analyse serum protein expression in AR patients and healthy controls. Overall, 1399 proteins were identified. Using a cut-off of Q<0.05 and a fold change > 1.2 for the expressed variation, 109 proteins showed distinct differential expression between the AR and control groups, of whom 72 were upregulated and 37 were downregulated. Several proteins, such as properdin, keratin 1, lipoprotein (a) and vitamin D-binding protein, may play roles in the pathogenesis of AR. This study focused on iTRAQ-based proteomic profiling of serum samples in AR. Insights from our work might help advance our understanding of the molecular mechanisms of AR and identify potential novel biomarkers of AR for further characterization.
Project description:The human-derived serotype Ⅴ ST1 GBS strains NNA038 and NNA048 was isolated from a amniotic fluid of full-term pregnant woman who suffered from premature rupture of membrane in China.Serotype Ia ST7 GBS strain YM001 is an attenuated strain ,its parent strain HN016 was isolated from an outbreak epidemical disease in tilapia from China.HN016_KO_D2 is a knockout strain from Serotype Ia ST7 GBS strain HN016.
Project description:In this iTRAQ quantification project, there were 6 Scophthalmus_maximus samples named CAA-1, CAA-2, CAA-3, Lys-Leu-1, Lys-Leu-2, Lys-Leu-3 and we did one technical duplicate experiments. Totally 935928 spectrums were generated, 32261 peptides and 5708 proteins were identified with 1% false discovery rate (FDR).
Project description:The health effect of dietary fat has been one of the most vexing issues in the nutrition field. Few animal studies have examined the impact of high-fat diets on lifespan by controlling energy intake. In this study, we found that compared to a normal diet, an isocaloric high-fat diet (IHF) significantly prolonged lifespan by decreasing the profiles of free fatty acids (FFAs) in serum and multiple tissues by downregulating FFAs anabolism and upregulating catabolism pathways in rats and flies. Proteomics analysis in rats identified PPRC1 as a key protein that was significantly upregulated by nearly 2-fold by IHF, and among the FFAs, only palmitic acid (PA) was robustly and negatively associated with the expression of PPRC1. Using PPRC1 transgenic RNAi/overexpression flies and in vitro experiments, we further demonstrated that IHF significantly reduced PA, which could upregulate PPRC1 through PPARG, resulting in improvements in oxidative stress and inflammation and prolonging lifespan.
Project description:Alopecia is an exceedingly prevalent problem and lacks effective therapy. Recently, research has focused on early-passage dermal papilla cells (DPCs), which have hair inducing activity both in vivo and in vitro. Our previous study indicated that factors secreted from early-passage DPCs contribute to hair follicle (HF) regeneration. To identify which factors are responsible for HF regeneration and why late-passage DPCs lose this potential,we collected 48-h-culture medium (CM) from both of passage 3 and 9 DPCs and subcutaneously injected the DPC-CM into NU/NU mice. Passage 3 DPC-CM induced HF regeneration, based on the emergence of a white hair coat, but passage 9 DPC-CM not. In order to identify the key factors responsible for hair inductive capacity, CM from passage 3 and 9 DPCs was analyzed by iTRAQ-based quantitative proteomic technology. We identified 1360 proteins, of which 213 proteins were differentially expressed between CM from early-passage vs. late-passage DPCs, including SDF1, MMP3, biglycan and LTBP1.Further analysis indicated that the differentially-expressed proteins regulated the Wnt, TGF-β and BMP signaling pathways, which directly and indirectly participate in HF morphogenesis and regeneration. Subsequently, we selected 19 proteins for further verification by multiple reaction monitoring (MRM) between the two types of CM. These results would be used to identify the key factors for inducing HF regeneration and reveal the molecular mechanisms of losing inductive ability of DPCs. Furthermore, it is possible to explore some drugs for alopecia in the clinic according to this secretome date analysis.