MicroRNA (miRNA)is small non-coding and single-stranded RNA existing in plants and animals with 19-25 nucleotides,miRNA expression is cell or tissue specific.The construction of miRNA has high conservation among different species.MiRNA regulate gene expression by binding with complementary sequences and inhibiting translation of target genes.They participate in tumor cell proliferation,differentiation and apoptosis processes as function as oncogenes or tumor supressor genes.Studies show that the abnormal changes of miRNA expression occurring in tumors,and it is involved in tumor development.Clarifying the relationship of miRNA and tumor gene in the oncogenesis is important for miRNA as potential therapeutic targets.

OBJECTIVE:To observe therapeutic efficacy and safety of batroxobin in the treatment of senile sudden deafness. METHODS:Totally 102 senile patients with sudden deafness were randomly divided into control group(51 cases)and observation group (51 cases). Control group was given routine treatment as Ginkgo biloba extract injection 105 mg+Dexamethasone sodium phosphate injection 30 mg+Methotrexate tablets 6 mg orally. Based on control group,observation group was additionally given Ba-troxobin injection 10 BU added into 0.9% Sodium chloride injection 100 mL intravenously,running out within 1 h,every 2 days, and then given 5 BU added into 0.9% Sodium chloride injection 100 mL intravenously,running out within 1 h. Both groups were treated for 10 d. Clinical efficacy,hearing recovery time,ear drowsiness disappearance time,dizziness disappearance time and tin-nitus disappearance time of 2 groups were observed. The levels of pure tone threshold,plasma specific viscosity(ns),high shear rate of whole blood viscosity(nbh),low shear rate of whole blood viscosity(nbl),hematocrit(HCT),erythrocyte sedimentation rate (ESR),Fb,endothelin (ET) and nitric oxide (NO) were observed before and after treatment as well as the occurrence of ADR. RESULTS:The total response rate of observation group was significantly higher than that of control group;hearing recovery time,ear drowsiness disappearance time,dizziness disappearance time and tinnitus disappearance time were significantly shorter than control group,with statistical significance(P<0.05 or P<0.01). Before treatment,there was no statistical significance in the levels of pure tone threshold,ns,nbh,nbl,HCT,ESR,Fb,ET and NO between 2 groups(P>0.05). After treatment,the levels of pure tone threshold,ns,nbh,nbl,HCT,ESR,Fb and ET in 2 groups were significantly lower than before;the observation group was significantly lower than the control group. The levels of NO in 2 groups were significantly higher than before;the obser-vation group was significantly higher than the control group,with statistical significance(P<0.01). During treatment,no obvious ADR was found in 2 groups. CONCLUSIONS:Based on routine treatment,batroxobin is effective in the treatment of sudden deaf-ness in the elderly,can effectively relieve the symptoms,improve the recovery of local blood flow and inner ear microcirculation disturbance with good safety.