Function and Characterization of the Argonaute2 Gene in the RNA Interference Pathway in the Diamondback Moth

Arch BiochemMol Biol2019;10(4):035-051DOI: 10.26502/abmb.007Archives of Biochemistry and Molecular BiologyVol. 10 No. 4 -December2019. 36AbstractArgonaute2 (AGO2) is a core catalytic component of the RNA-induces silencing complex (RISC) that binds to small guide RNAs containing small interfering RNA (siRNA) and microRNA (miRNA). The guide RNA leads RISC to the complementary mRNA for gene suppression. We cloned the full length cDNA (2193 bp) of the Ago2gene (PxAgo2) from diamondback moth (DBM, Plutella xylostella). The predicted PxAgo2 protein hadan83 kDa molecular weight withatheoretical isoelectric point of 9.39. The phylogenetic tree showed a high similarity of PxAgo2with Bombyx moriAgo2 (BmAgo2). Western blot and RT-qPCR analyses showed a clear increase in the PxAgo2 mRNA and protein expression levels in the egg, 4thinstar larva, pre-pupa, pupa and adult. The double-stranded RNA-mediated RNAi of PxAgo2in DBM larvae was found 3 h after dsRNA injection,and the knockdown level was increased over time up to 36 h. PxAgo2silencing recovered the expression of PxBurs-?(Bursicon-? inDBM) to the normal expression level, which was suppressed bydsPxBurs-?in a DBM cell line. The overexpression of PxAgo2fundamentally enhanced the PxBurs-? silencing efficiency in DBM cells. Our findings reveal that PxAgo2is involved in the dsRNA-regulated gene silencing mechanism and performs a crucial function in the RNAi process ofDBM

The predictive values of sphingosine-1-phosphate and adiponectin in patients with in-stent restenosis / 重庆医学

Objective To investigate the predictive value of sphingosine‐1‐phosphate (S1P) and adiponectin after coronary stent implantation .Methods Fifty patients confirmed by coronary angiography with in‐stent restenosis were selected as in‐stent resteno‐sis group while 50 patients without in‐stent restenosis were chose as control group .All cases were detected with the density of their serum S1P ,HDL‐S1P ,adiponectin and IL‐18 and analyzed relevance to in‐stent restenosis .Results Compared with the control group ,serum S1P in in‐stent restenosis group were lower [ (96 .10 ± 26 .33)ng/mL vs .(113 .40 ± 32 .72)ng/mL ,P0 .05] .Adiponectin showed a positive correlation between S1P (r=0 .712 , P<0 .05) and HDL‐S1P (r=0 .821 ,P<0 .01) .Conclusion S1P and adiponectin could be independent predictive factor of coronary stent restenosis ,and high concentrations of S1P and adiponectin may reduce risk of in‐stent restenosis in patients with stenting per‐cutaneous coronary intervention (PCI) .

Urodynamic study of bladder dysfunction after radical resection of rectal carcinoma / 中国医师进修杂志

Objective To investigate the diagnosis and treatment of bladder dysfunction after radical resection of rectal carcinoma.Methods One hundred and sixty-five patients with bladder dysfunction after radical resection of rectal carcinoma were observed by urodynamic study.The results included maximum urinary flow rate,postvoid residual,urine volume,pressure of detrusor,maximum urethral closure pressure.These patients were treated by different methods.Results Bladder with underactive detrusor were 116 patients,109 patients returned to normal voiding after 3 months,7 patients were performed with suprapubic cystostomy.Detrusor overactivity were 42 patients,insufficiency of urethral sphincter were 7 patients,all symptoms of them improved after treatment.Conclusion Patients with bladder dysfunction after radical resection of rectal carcinoma should do check to clear etiology,according to the results to take the appropriate means to treatment.