BACKGROUND:Orthosis is a common and effective treatment for mild to moderate scoliosis,which can delay and inhibit the progression of scoliosis and reduce the incidence of severe deformity.Different types of orthoses have different indications,application characteristics,and efficacies.In recent years,the application of new technology like digital and intelligent has promoted the improvement and development of new orthoses. OBJECTIVE:To classify and compare the commonly used scoliosis orthoses,and describe the application progress of new technologies such as digital and intelligent technology in recent years,so as to provide a reference for the clinical selection of orthoses and the improvement of new orthoses. METHODS:PubMed,Embase,IEEE,CNKI and WanFang databases were searched for relevant literature.Chinese and English search terms were"scoliosis,orthosis,brace,progress,artificial intelligence,digitization".The search time limit was from 2012 to 2022.Finally,56 articles were included for review and analysis. RESULTS AND CONCLUSION:(1)Scoliosis orthosis has a good effect on mild to moderate adolescent idiopathic scoliosis.Through the Hueter-Volkmann law,it can accelerate the growth of the concave spine with a high success rate and has been widely used in this field.(2)The indications,application characteristics and efficacy of different types of orthoses are different,and the clinical selection is targeted.(3)Scoliosis orthosis has been developed in the direction of more humanity,paying attention to the comfort of patients,and the manufacturing process has been transformed from plaster casting to computer-aided manufacturing.It is simple and hygienic,with higher correction accuracy,and patients'compliance has been significantly improved.(4)Scoliosis orthosis is developing in the direction of digitalization and intelligence and has been widely integrated with artificial intelligence,Internet of things and other technologies to monitor the patient's orthopedic force,body temperature,and compliance in real time,so as to provide patients with more accurate treatment.(5)At present,there are still many defects in scoliosis orthosis that cannot be ignored,such as affecting development,decreased muscle strength,and body stiffness,which need further exploration and improvement.

OBJECTIVESTo construct a hepatoma directed gene delivery system which could transfer preS2 antisense RNA to liver cancer cells specifically, and to explore a new therapeutic strategy for hepatocellular carcinoma by blocking hepatitis B virus (HBV) with antisense RNA targeting hepatocellular carcinoma.

METHODSGE7 and HA20 were synthesized and mixed with pEBAF-as-preS2, a hepatocarcinoma specific HBV antisense expression vector, to construct a novel HBV antisense RNA delivery system named AFP-enhancing 4-element complex. Nude mice bearing hepatocelluar carcinoma cells HepG2.2.15 were injected with AFP-enhancing 4-element complex via a tail vein. Total RNA from tissues was extracted, and reversal transcription-ploymerase chain reaction (RT-PCR) was used to detect the expression of preS2. Different doses of AFP-enhancing 4-element complex was injected into nude mice at different time points, and tumor diameter was measured.

RESULTSAFP-enhancing 4-element complex was constructed successfully. RT-PCR showed preS2 antisense RNA delivered by AFP-enhancing 4-element complex only expressed in liver tumor HepG2.2.15 cells of the mice. After the treatment of AFP-enhancing 4-element complex with dose of 0.2 micro g per mouse (once a week for 4 weeks), the mean tumor diameter of nude mice was significantly shorter than that of the control groups (0.995 +/- 0.35 cm vs 2.125 +/- 0.25 cm, P < 0.01).

CONCLUSIONSAn HBV antisense RNA gene delivery system targeting hepatocellular carcinoma, AFP-enhancing 4-element complex, was constructed successfully. PreS2 antisense RNA expressed specifically in hepatocelluar carcinoma cells significantly inhibits tumor growth of mice bearing hepatocarcinoma HepG2.2.15 and may have therapeutic potential in HBV related hepatocarcinoma.

Animals ; Drug Delivery Systems ; Gene Transfer Techniques ; Genetic Therapy ; Genetic Vectors ; Hepatitis B Surface Antigens ; therapeutic use ; Hepatitis B virus ; genetics ; Liver Neoplasms, Experimental ; pathology ; therapy ; Male ; Mice ; Mice, Nude ; Protein Precursors ; therapeutic use ; RNA, Antisense ; therapeutic use