BAC (Bacterial Artificial Chromosom) transfection and co-transfection with siRNA into BE(2) cells using Magnetofection (NeuroMag)

BAC DNA transfection and co-transfection with siRNA in Be(2)C cells was performed using 4 µg of BAC DNA and 14µL NeuroMag. 50-70 % of efficiency was obtained after 48h of incubation.

This paper shows the high efficiency of NeuroMag from OZ Biosciences to transfect any kind of neuronal cell type with Bacterial Artificial Chromosom (BAC).

article reference: J Neurosci. 2014 Aug 13;34(33):11048-66

A Heroin Addiction Severity-Associated Intronic Single Nucleotide Polymorphism Modulates Alternative Pre-mRNA Splicing of the μ Opioid Receptor Gene OPRM1 via hnRNPH Interactions.

Xu J, Lu Z, Xu M, Pan L, Deng Y, Xie X, Liu H, Ding S, Hurd YL, Pasternak GW, Klein RJ, Cartegni L, Zhou W, Pan YX.

Abstract
Single nucleotide polymorphisms (SNPs) in the OPRM1 gene have been associated with vulnerability to opioid dependence. The current study identifies an association of an intronic SNP (rs9479757) with the severity of heroin addiction among Han-Chinese male heroin addicts. Individual SNP analysis and haplotype-based analysis with additional SNPs in the OPRM1 locus showed that mild heroin addiction was associated with the AG genotype, whereas severe heroin addiction was associated with the GG genotype. In vitro studies such as electrophoretic mobility shift assay, minigene, siRNA, and antisense morpholino oligonucleotide studies have identified heterogeneous nuclear ribonucleoprotein H (hnRNPH) as the major binding partner for the G-containing SNP site. The G-to-A transition weakens hnRNPH binding and facilitates exon 2 skipping, leading to altered expressions of OPRM1 splice-variant mRNAs and hMOR-1 proteins. Similar changes in splicing and hMOR-1 proteins were observed in human postmortem prefrontal cortex with the AG genotype of this SNP when compared with the GG genotype. Interestingly, the altered splicing led to an increase in hMOR-1 protein levels despite decreased hMOR-1 mRNA levels, which is likely contributed by a concurrent increase in single transmembrane domain variants that have a chaperone-like function on MOR-1 protein stability. Our studies delineate the role of this SNP as a modifier of OPRM1 alternative splicing via hnRNPH interactions, and suggest a functional link between an SNP-containing splicing modifier and the severity of heroin addiction.

NeuroMag is the first dedicated Magnetofection ™ transfection reagent for neurons. It is perfect for primary neurons and can also be used with cell lines and glial cells. The transfection can be performed with neurons from 3 DIV to 21 DIV. It can also be used on ES cell derived motor neurons as well as any neuronal cell lines.