Project description:The discovery of the natural adhesion phenomena and mechanisms has advanced the information and development of a new generation of tissue adhesives in recent decades. In this study, we developed a natural biological adhesive from snail mucus consisting of a positively charged protein network and a polyanionic glycosaminoglycan network. The malleable bulk adhesive matrix could adhere to wet tissue through multiple interactions. The biomaterial exhibited excellent hemostatic and tissue adhesion properties in vitro and in vivo, and was also effective in accelerating the healing of full-thickness skin wounds in both normal and diabetic rats. The natural biomaterial effectively promoted the polarization of macrophages toward the anti-inflammatory M2 phenotype, alleviated inflammation in chronic wounds, and significantly improved epithelial regeneration and angiogenesis. Its abundant heparin-like glycosaminoglycan component was indispensable. These findings provide theoretical and material insights into bio-inspired tissue adhesives and bioengineered scaffold designs.
Project description:Cervical mucus is a viscous fluid functioning as a uterine cervix plug. It is formed and produced by cervical glands located in the cervix. During ovulation, cervical mucus starts to become less viscous, which is a good window for non-invasive sampling. Our study focuses on the proteomic characterization of cervical mucus, which may thus act as a non-invasively acquired source of biomarkers for diseases and physiological conditions of the female genital tract. Our study aimed at two aims - the first is to optimize a proteomic workflow of cervical mucus processing. The second aim is to assess differences in the proteomic composition of cervical mucus in natural ovulatory cycles and IVF cycles with controlled ovarian hyperstimulation. The sampling was done in cooperation with women undergoing intrauterine insemination in a natural ovulatory cycle and women undergoing controlled ovarian hyperstimulation for IVF. The optimization of proteomic workflow including an analysis on an Orbitrap mass spectrometer was performed. The results revealed the protein composition and the differences of the cervical mucus between natural and stimulated uterus.
Project description:Expression profiling of Drosophila melanogaster halo[AJ] snail[Df(2L)TE116GW11] and halo[AJ] sna[V2] homozygous mutant embryos at two timepoints of embryogenesis. Embryos were manually sorted and assayed at cellularisation stage (stage 5 to early stage 6) and at gastrulation stage (late stage 6 to early stage 8). Homozygous mutant embryos were sorted based on their reduced transparency caused by the recessive mutation of halo[AJ]. Stage-matched halo[AJ] embryos served as wildtype control. Total RNA was extracted, amplified and hybridized to Affymetrix GeneChip Drosophila Genome array version 2. Three biological replicates at each condition were generated.
Project description:A genomic overview of in vivo binding of a transcription factor Snail in the ascidian early gastrula embryo. Fertilized eggs were electroporated with a construct encoding GFP-tagged Snail. After fixation, chromatin was sonicated to obtain DNA fragments with an average of size of 1kb. The DNA fragments were enriched by immunoprecipitation with an polyclonal antibody specific for GFP (Invitrogen). The immunoprecipitated and WCE (Whole Cell Extract) DNA were amplified by LM-PCR for the Chip analysis. Two independent experiments were performed to reduce experimental errors.
Project description:Proteins were extracted from the perivitelline fluid of the apple snail Pomacea maculata eggs. And then proteins were seperated on SDS-PAGE gel and analyzed by LTQ-Orbitrap Elite coupled to an Easy-nLC.