Endothelin(1-21) ELISA Kit

Cleft Lip with or without cleft palate (CL +/- P) is one of most common congenital orofacial anomaly, with a frequency of 1/700-1/1,000 live births among Caucasians. This embryopathy is due to a failure of nasal processes and palatal shelves fusion. Approximately 20 % of patients have a positive family history of CL +/- P, and thus genetic factors are thought to be important in its etiology. Four different chromosomal regions, 6p23-25, 2p13, 17q21.1 and 1q21, have been claimed to contain a CL +/- P locus. In our study we investigated the possible CL +/- P locus of chromosome 6p23. To this purpose we selected a group of markers, which map on this chromosome region, to analyse a large sample of families. Twentyone families characterized by the presence of at least two affected CL +/- P individuals, arising from north-eastern Italy, were enrolled in this study. DNA was analyzed with five highly informative PCR markers close to the putative CL +/- P locus: 1 VNTR factor 13A, and 4 dinucleotide repeats at loci EDN1, D6S89, D6S109, D6S105. Our results demonstrate that nonsyndromic familiar CL +/- P is heterogeneous; these data are in agreement with the idea of a model of a dominant major gene modified by additional genetic and/or enviromental factors. So it is possible that different chromosomal region are involved in etiology of the disease. Our linked families showed an autosomal dominant inheritance with incomplete penetrance. Finally, CL +/- P locus maps on 6p23 very close to, or at the microsatellite marker D6S89.

The signature lesion of SSA/Ro autoantibody-associated congenital heart block (CHB) is fibrosis and a macrophage infiltrate, supporting an experimental focus on cues influencing the fibroblast component. The transcriptomes of human fetal cardiac fibroblasts were analyzed using two complementary approaches. Cardiac injury conditions were simulated in vitro by incubating human fetal cardiac fibroblasts with supernatants from macrophages transfected with the SSA/Ro-associated noncoding Y ssRNA. The top 10 upregulated transcripts in the stimulated fibroblasts reflected a type I interferon (IFN) response [e.g., IFN-induced protein 44-like (IFI44L), of MX dynamin-like GTPase (MX) 1, MX2, and radical S-adenosyl methionine domain containing 2 (Rsad2)]. Within the fibrotic pathway, transcript levels of endothelin-1 (EDN1), phosphodiesterase (PDE) 4D, chemokine (C-X-C motif) ligand (CXCL) 2, and CXCL3 were upregulated, while others, including adenomedullin, RAP guanine nucleotide exchange factor 3 (RAPGEF3), tissue inhibitor of metalloproteinase (TIMP) 1, TIMP3, and dual specificity phosphatase 1, were downregulated. Agnostic Database for Annotation, Visualization and Integrated Discovery analysis revealed a significant increase in inflammatory genes, including complement C3A receptor 1 (C3AR1), F2R-like thrombin/trypsin receptor 3, and neutrophil cytosolic factor 2. In addition, stimulated fibroblasts expressed high levels of phospho-MADS box transcription enhancer factor 2 [a substrate of MAPK5 (ERK5)], which was inhibited by BIX-02189, a specific inhibitor of ERK5. Translation to human disease leveraged an unprecedented opportunity to interrogate the transcriptome of fibroblasts freshly isolated and cell sorted without stimulation from a fetal heart with CHB and a matched healthy heart. Consistent with the in vitro data, five IFN response genes were among the top 10 most highly expressed transcripts in CHB fibroblasts. In addition, the expression of matrix-related genes reflected fibrosis. These data support the novel finding that cardiac injury in CHB may occur secondary to abnormal remodeling due in part to upregulation of type 1 IFN response genes. NEW & NOTEWORTHY Congenital heart block is a rare disease of the fetal heart associated with maternal anti-Ro autoantibodies which can result in death and for survivors, lifelong pacing. This study provides in vivo and in vitro transcriptome-support that injury may be mediated by an effect of Type I Interferon on fetal fibroblasts.