Rabbit Anti-Human RET (a.a. 29-635) Polyclonal antibody

Background Hirschsprung disease, the most important congenital colonic dysmotility in children results from neural crest migration, differentiation, proliferation, or apoptosis defects where the rearranged during transfection (RET)-Protooncogene pathway has a central role. Although palatal and retinal anomalies in the context of chromosomopathies and some mono-/oligogenic syndromes are reported associated with Hirschsprung disease the role of inactivating RET mutations in these cases is not clarified. Case presentation We report on a dysmorphic newborn with cleft palate and palatal synechia, who showed intestinal obstruction after 24 h of life. Transient ileostomy and surgical biopsies were performed to diagnose aganglionosis of the colon and last ileal loop. No chromosomal anomalies or copy number variations were found. We identified a paternal heterozygous germline mutation c.1852 T > C, which results in the substitution of cysteine by arginine in the RET-receptor tyrosine kinase (p.C618R mutation). There was no family history of Hirschsprung disease, but the father underwent surgery for medullary thyroid carcinoma and was affected by retinal dystrophy. Conclusions The occurrence of Hirschsprung disease and carcinoma shows how a single mutation may be responsible for adverse effects: gain and loss of function of the same receptor. Furthermore, it would be interesting to study its dual role in face and retina embryology, and to extend targeted investigations ofREThotspots in these developmental abnormalities to facilitate counselling, follow-up, and tumor prevention. Complex surgical procedures and genetic testing as well as socio-economic impact are a challenge for familiar compliance.

Flax (Linum usitatissinum L.) is an economically important fiber crop species as it produces long cellulosic fibers with high tensile strength. The first step in flax fiber extraction occurs after harvest via a process known as dew retting in which pulled (uprooted) plants are placed on the soil. During this process microorganisms from the soil and the phyllosphere develop on the plants, leading to partial decomposition of the stem tissues and facilitated mechanical extraction and improved fiber quality. Despite its importance, the management of dew retting is mainly based on empirical knowledge that makes the process difficult to control. In this study the dynamics of flax dew retting were investigated for the first time by combining targeted-metagenomics (metabarcoding), enzymatic activities and chemical and microscopic characterization of the stem. This multimodal approach indicated that intensive microbial colonization and major chemical changes in the stem cell wall composition occurred during the first weeks of retting leading to progressive fiber bundle decohesion in the outer stem tissues. The main changes could be explained by the degradation of pectin-rich and non-lignified thin walls of both the parenchyma cells surrounding fiber bundles, and the differentiating xylem and cambial cells. Field emission scanning electron microscopy suggested that the ultrastructure of the fiber secondary wall is weakly impacted by dew-retting. Analyses indicated that the mechanical properties of extracted technical fibers were improved during the last retting stages. Overall data on thermoplastic composites produced by a twin-screw extrusion and injection molding processes suggested that the retting degree had a small but significant effect on tensile properties.