RESUMO
BACKGROUND: Osteoarthritis (OA) pertains to a chronic disease of degenerative joints distinguished by articular cartilage destruction, subchondral bone remodeling, osteophyte formation, and inflammatory changes. Chondrocyte apoptosis is inextricably linked to cartilage degeneration. SRY-related high-mobility-group-box 9 (SOX9) is a well-acknowledged transcription factor in the chondrogenesis. Nevertheless, the detailed function of miR-138-5p/SOX9 in OA remains to be fully clarified. MATERIALS AND METHODS: qRT-PCR was performed to measure the expressions of miR-138-5p and SOX9 mRNA in OA and normal cartilage tissues and cells. Human chondrocyte cell lines, CHON-001 and ATDC5, were treated with different doses of interleukin-1ß (IL-1ß) to simulate the inflammatory response environment of OA. miR-138-5p mimics, miR-138-5p inhibitors, and SOX9 small interfering RNA (siRNA) were constructed and transfected into CHON-001 and ATDC5 cells. CCK-8 was conducted to determine the cell viability and transwell assay was used to monitor the migration of cells. Western blot was carried out to detect the expressions of apoptosis- related factors. Enzyme-linked immunosorbent assay (ELISA) was adopted to measure the contents of inflammatory factors. TargetScan predicted SOX9 was a target gene of miR-138-5p, which was then verified by luciferase assay. RESULTS: miR-138-5p expression was down-regulated in OA and regulated SOX9 expression. The downregulation of miR-138-5p facilitated the proliferation and migration of CHON-001 and ATDC5 cells, while impeded their apoptosis and inflammatory response. Besides, down-regulated SOX9 can counteract the promoting effect of down-regulated miR-138-5p on the proliferation and migration of chondrocytes. CONCLUSION: miR-138-5p can arrest the proliferation and migration of CHON-001 and ATDC5 via restraining SOX9, and facilitate the apoptosis and inflammation. This study revealed the protective effect of down-regulated miR-138-5p on the inflammatory injury of chondrocytes caused by IL-1ß.
Assuntos
Condrócitos/citologia , Inflamação , Interleucina-1beta/farmacologia , MicroRNAs/genética , Fatores de Transcrição SOX9/genética , Linhagem Celular , Condrócitos/efeitos dos fármacos , Regulação para Baixo , HumanosRESUMO
Objective To analyze the characteristics of lower respiratory tract infection occurring in patients after craniocerebral surgery in Intensive Care Unit (ICU) and explore its nursing countermeasures. Methods Sixty-eight patients with lower respiratory tract infection after craniocerebral surgery in the ICU of the First Affiliated Hospital of Wenzhou Medical University from January 2015 to March 2016 were selected as the study subjects. All patients were treated with dehydration to reduce intracranial pressure, hemostasis, anti-infection, anti-epilepsy, mild hypothermia, hypoglycemia and other symptomatic supportive treatments, and the corresponding nursing measures were given. The patients' primary diseases and etiological examination results were analyzed. Results Of the 68 patients complicated with lower respiratory tract infection after craniocerebral surgery, the majority of primary disease was craniocerebral injury, accounting for 45.59% (31/68). A total of 127 strains of pathogenic bacteria were isolated, mainly Gram-negative (G-) bacteria [92 strains (accounting for 72.44% )];followed by Gram-positive (G+) bacteria [19 strains (accounting for 14.96%)] and fungi [16 strains (accounting for 12.60%)]. The main pathogens of G- were Acinetobacter baumannii 21 strains (accounting for 23.14%), Klebsiella pneumoniae 13 strains (accounting for 14.94%), Burkholderia cepacia 10 strains (accounting for 11.49%), Pseudomonas aeruginosa 8 strains (accounting for 11.49%); the main pathogens of G+ was Staphylococcus aureus 6 strains (accounting for 5.89%). Conclusion The incidence of lower respiratory tract infection in ICU patients after craniocerebral surgery is high. It is necessary to prevent and control the related risk factors as soon as possible, and take energetic and effective nursing measures to reduce the incidence of lower respiratory tract infection.
RESUMO
BACKGROUND:There are various commonly used interbody fusion methods, such as autologous bone, al ograft bone and titanium-based posterior lumbar interbody fusion, and each method has its own advantages and disadvantages. OBJECTIVE:To observe the clinical efficacy of a bioactive nano-hydroxyapatite/polyamide 66 fusion cage in posterior lumbar interbody fusion for the treatment of lumbar disease. METHODS:A retrospective case analysis was conducted on 16 cases treated with posterior lumbar interbody fusion at the Department of Orthopedic, the First Affiliated Hospital of Gannan Medical University from July 2010 to December 2011, and al the patients were implanted with nano-hydroxyapatite/polyamide 66 biological activity fusion cage. RESULTS AND CONCLUSION:Al the patients were fol owed-up for 10-24 months, and the lumbar pain was significant improved, the lumbar visual analogue score, lumbar Japanese Orthopaedic Association score and Oswestry disability index score were significantly improved during the final fol ow-up period (Pfusion without nano-hydroxyapatite/polyamide 66 fusion cage displacement or subsidence. The results indicate that nano-hydroxyapatite/polyamide 66 fusion cage for the treatment of posterior lumbar interbody fusion can reconstruct the lumbar stability and provide immediate stability after implantation, and has good biological activity.