Targeting specific gene splicing with Calcium channel inhibitors against the inflammatory effect of bacterial lipopolysaccharide in vivo
Trauma patients, who are exposed to bacterial infections i.e. traumatic accidents are at risk to be exposed to so-called “LUCOHAS” (mortal LPSUPR- Calcium Overload Hyper- Activation System). The essential components of LUCOHAS signaling pathway are consist of 4 main key players.
The aim of this study is to evaluate induction of inflammatory processes and assess the administration effects at molecular and tissue cytokine
changes, in an innovative prepared model system, in vivo.
Methods: The LPS was extracted from patients’ burned wounds after Pseudomonas aeruginosa isolation (hLPS), with informed consent. The
male c57/BL6 mice divided into 6 groups: 1. Two controls, one received nothing another sterile pyrogen-free normal saline, 3. hLPS (3 mg/kg/
intraperitoneal), 4. hLPS+ Dantrolene sodium (Dan)-calcium release inhibitor (CCI1) (40 mg/kg), 5. 2-aminomethyl phenyl borinate (2APB)-
CCI2 (1 mg/kg) and 6. hLPS+CCI1/CCI2. Subsequently, mice livers were extracted for evaluating the X-box Binding Protein 1 gene (XBP-1)
Splicing as a marker of the adaptive UPR activation and cytokine assay after 2, 8 and 24 hrs.
Results: Compared to the controls, the IL-1β levels in hLPS group significantly increased after 8 and 24 h injection (P<0.05). Treatment with
CCIs decrease dramaticallythis level (P < 0.05). TNF-α level 2, 8 and 24 h after hLPS injection remarkably increase in comparison to the control
group (P < 0.01), treatment with CCIs decreases this level (P <0.05). Compared to control groups, treatments with the hLPS injections showed a
significant increase in the XBP-1 splicing. Compared to all attempts to inhibit calcium release, hLPS with combined CCI1/ CCI2 showed significant
increase in the XBP-1 splicing after 2, 8 and 24 h (P < 0.05). Our results clearly showed that combination of both CCIs had better effectiveness
to inhibit (pro-) inflammatory processes and could be considered as a new strategy to manage and prevent the LUCOHAS, appropriately