Project description:Primary outcome(s): Quantitative detection and monitoring of genetic mutations in tumor-associated genes, such as oncogenic KRAS, in circulating plasma DNA.
| 2628163 | ecrin-mdr-crc
Project description:Gut commensal from healthy human volunteer
Project description:Sixteen volunteers, that were age, gender and BMI matched, were included in the study. Blood samples were taken one per each volunteer on three different days to also assess variability of gene expression markers in one individual. In all datasets variability between volunteers was higher than variability of measurables in samples collected from the same volunteer on different days. We have identified genes in individuals that are highly stable during one month period and are thus suitable as markers of individual disease/therapy progress. A list of genes with low overall variability is also available. Interestingly, data show that important components of immune response are down-regulated with BMI in T helper and NK cells. This paper also gives the first insight into the gene expression profile of T helper and NK cells in healthy population.
Project description:Carcinogenesis is a genetic process in which molecular changes occur earlier than histomorphological changes. The key to early detection of oral squamous cell carcinoma (OSCC) is to identify genetic alterations. However, aberrant lncRNA expression profiles in OSCC plasma is still largely unknown. Using an lncRNA microarray, we analyzed the aberrant lncRNA expression profiles in OSCC plasma compared with paired healthy volunteer plasma. Our data revealed 7473 differentially expressed (Fold Change >= 2.0, P-value <= 0.05) lncRNAs, among which 3972 lncRNAs were significantly up-regulated and 3501 lncRNAs were down-regulated in OSCC compared with paired healthy volunteer plasma.
Project description:The specific genes that distinguish normal fracture healing from abnormal healing or nonunion in humans are unknown. This study was an exploratory investigation of peripheral blood from 2 chronic nonunion patients collected perioperatively (pre/post revision surgery) and at 3 months post revision follow up for comparison to Acutely injured subjects and Healthy volunteer cohorts analyzed separately. We used microarrays to do a global comparison between 2 chronic nonunion patients collected perioperatively (pre/post revision surgery) and at 3 months post revision follow up.
Project description:The specific genes that distinguish normal fracture healing from abnormal healing or nonunion in humans are unknown. This study was an exploratory investigation of peripheral blood from 2 chronic nonunion patients collected perioperatively (pre/post revision surgery) and at 3 months post revision follow up for comparison to Acutely injured subjects and Healthy volunteer cohorts analyzed separately. We used microarrays to do a global comparison between 2 chronic nonunion patients collected perioperatively (pre/post revision surgery) and at 3 months post revision follow up.
Project description:Fluorescence-activated cell sorting (FACS) is a specialized technique to isolate
cell subpopulations with a high level of recovery and accuracy. However, the cell sorting
procedure can impact the viability and metabolic state of cells. Here, we performed a comparative study and evaluated the impact of traditional high-pressure charged droplet-based and a microfluidic chip-based sorting approach on the metabolic and phosphoproteomic profile of different cell types. While microfluidic chip-based sorted cells more closely resembled the unsorted control group for most cell types tested, the droplet-based sorted cells showed significant metabolic and phosphoproteomic alterations. In particular, greater changes in redox and energy status were present in cells sorted with the droplet-based cell sorter along with higher transcriptional and spliceosomal regulation and mechanical stress signaling. These results
indicate microfluidic chip-based sorting is less disruptive compared to droplet-based sorting.
Project description:Proteins of the human hair shaft contain a wealth of information about the coding regions of the person’s genome from whom the hair is derived. Commonly found at crime scenes, hair shafts may thus provide useful forensic evidence if the information they contain can be exploited. Present experiments show that hair shafts from four different anatomic sites are similarly useful in distinguishing individuals by protein profiling. However, the results demonstrated that protein profiles were dependent on anatomic site, indicating that a proper comparison requires matching the sites of origin. The differences in profile offer the prospect of determining the site of origin of hair by comparison with profiles of shafts from other anatomic sites. By contrast, the genetically variant peptides detected in the protein digests, that map to non-synonymous single nucleotide polymorphisms in subject DNA, were detectable regardless of the anatomic origin of the hair shafts. The resulting profiles of genetically variant peptides were more dependent on a subject’s genotype than on the anatomic origin of the hair shaft. Individual identification therefore can be based on peptide profiles regardless of body location. This study demonstrates the utility of proteomic analysis for increasing the forensic value of hair shaft evidence.
Project description:Sixteen volunteers, that were age, gender and BMI matched, were included in the study. Blood samples were taken one per each volunteer on three different days to also assess variability of gene expression markers in one individual. In all datasets variability between volunteers was higher than variability of measurables in samples collected from the same volunteer on different days. We have identified genes in individuals that are highly stable during one month period and are thus suitable as markers of individual disease/therapy progress. A list of genes with low overall variability is also available. Interestingly, data show that important components of immune response are down-regulated with BMI in T helper and NK cells. This paper also gives the first insight into the gene expression profile of T helper and NK cells in healthy population. CD4 and NK lymphocytes were isolated with positive selection using magnetic nanoparticle based kits from StemCell Inc. (Canada) and frozen to -80°C until total RNA extraction.