Objective:To investigate the effect of lncRNA HOTAIR on the radiosensitivity of glioma cells and its underlying mechanism.Methods:The negative control plasmid, HOTAIR silencing plasmid, miR-NC over expressing plasmid, miR-17-5p over expressing plasmid were transfected into U87R cells, and assigned intothe silencing control, HOTAIR silencing, miR-NC over expressing and miR-17-5 pover expressing groups. Cells in the the above groups were irradiated at a dose of 4Gy, and recorded as silencing control+ 4Gy group, HOTAIRsilencing+ 4Gy group, miR-NC over expressing+ 4Gy group and miR-17-5p over expressing+ 4Gy group. The HOTAIR silencing plasmid, miR-NC suppressing plasmid and miR-17-5p suppressing plasmid were co-transfected into U87R cells and recorded as the HOTAIR silencing+ miR-NC suppressing group and HOTAIR silencing+ miR-17-5p suppressing group. All procedures were transfected by the liposome method. The expression of miR-17-5p and HOTAIR was detected by qRT-PCR. The radio sensitivity of glioma cells was evaluated by cell clone formation assay. The cell apoptosis was assessed by flow cytometry. The fluorescence activity was assessed by dual luciferase reporter assay.Results:HOTAIR was highly expressed in the radiation-resistant glioma cells. Silencing HOTAIR and over-expressing miR-17-5p could increase the radiosensitivity of U87R cells and promote radiation-induced apoptosis of U87R cells. HOTAIR could target and regulate the miR-17-5p expression. Suppressing miR-17-5p reversed the effect of silencing HOTAIR on U87R cell sensitization and promoting radiation-induced U87R cell apoptosis.Conclusions:Silencing lncRNA HOTAIR yields radiation sensitization and promotes radiation-induced apoptosis in glioma cells. The mechanism may be related to the regulation of miR-17-5p.

OBJECTIVETo design a kind of adjustable triangle external fixator, and to use it for treating calcaneal fractures.

METHODSThe external fixator was installed into extremity near the both sides of three Kirschner wires crossing the calcaneal tubercle, the lower end of the tibia and the first cuneiform. The support rod length was adjusted to ensure the Kirschner wires affecting the calcaneal tubercle, so the Böhler angle and anteroposterior diameter of the calcaneus were recovered. From April in 2003 to April in 2008, the external fixators were used to treat 34 patients with calcaneal fractures, including 30 males and 4 females, ranging in age from 19 to 54 years, with an average of 36.7 years. The Böhler angles were -5 degree to 15 degree, with an average of 13.5 degrees. According to Sander's classification, 2 patients were type II, 20 patients were type III, and 12 patients were type IV.

RESULTSThirty-four patients were followed up, and the duration ranged from 3 months to 4 years, averaged 25 months. The Böhler angle recovered to 30 degree to 40 degrees, with a mean of 32.5 degrees. The Maryland mean score improved from preoperative (24.76+/-15.05) to postoperative (83.26+/-16.81). Based on Maryland criteria, 8 patients got an excellent result, 21 good, 3 fair and 2 bad.

CONCLUSIONThe adjustable triangle external fixator for treating calcaneal fractures has the following advantages : simple approach, good recovery, little reinjury and complications, effectiveness to recovery Böhler angle and anteroposterior diameter of calcaneal, which is an ideal method to treat calcaneal fractures.

Adult ; Calcaneus ; diagnostic imaging ; injuries ; surgery ; External Fixators ; Female ; Fractures, Bone ; diagnostic imaging ; surgery ; Humans ; Male ; Middle Aged ; Models, Theoretical ; Radiography ; Treatment Outcome ; Young Adult

Objective:To explore the current situation of knowledge, attitude and practice in the prevention and treatment of lymphedema after tumor treatment among nurses in cancer hospitals, and analyze its influencing factors.Methods:This study is a cross-sectional study. From October to November 2021, convenience sampling was used to survey 478 nurses from Hunan Cancer Hospital using the self-made Lymphedema Prevention and Treatment Knowledge, Attitude and Practice Questionnaire, which included 41 items from three dimensions of knowledge, attitudes and practice. The influencing factors of nurses' knowledge, attitude and behaviors related to lymphedema were studied using univariate analysis and multiple linear regression analysis.Results:The knowledge, attitude and practice scores and the total score of nurses in the cancer hospital regarding the prevention and treatment of lymphedema after tumor treatment were (17.05±9.81) , (49.96±6.03) , (30.51±11.03) , and (97.53±21.52) , respectively. The score rate of knowledge dimension was the lowest at 42.63%, while the score rate of attitude dimension was the highest at 90.84%. Multiple linear regression showed that working with lymphedema patients, participation in lymphedema training, training forms (on-the-job continuing education, school studies, self-study) , and the nurses' department being the breast or gynecological oncology department were the influencing factors for the nurses' knowledge, attitude, and practice in the prevention and treatment of lymphedema ( F=15.801, P<0.01) . Conclusions:Nurses in the cancer hospital generally have a moderate level of knowledge, attitude and practice in the prevention and treatment of lymphedema after tumor treatment. They have poor knowledge mastery and need to improve their behavioral, but their attitude is relatively positive. Nursing managers in cancer hospitals should strengthen training on lymphedema related knowledge among nurses from departments other than breast and gynecological oncology, strengthen nurses' knowledge and behavior in the prevention and treatment of lymphedema, and cultivate lymphedema therapists and specialized nurses. At the national level, policies should be introduced to establish a complete lymphedema rehabilitation training system, and improve nurses' ability to prevent and treat lymphedema in clinical practice.

While surgical operation is the preferred treatment for liver malignancies,the postoperative recurrence rate remains high. In the early 21 st century,Japanese scientists first reported the use of indocyanine green(ICG) in liver resection. Follow-up studies also found its potential applications such as identifying tumors,determining surgical margins,delineating segmental boundaries,and preventing bile leakage. At present,ICG fluorescence imaging is applied to some types of hepatectomy with excellent effect and is expected to assist in generating surgical strategies for liver malignancies. However,its safety and efficacy still need further studies to evaluate.

While surgical operation is the preferred treatment for liver malignancies,the postoperative recurrence rate remains high. In the early 21 st century,Japanese scientists first reported the use of indocyanine green(ICG) in liver resection. Follow-up studies also found its potential applications such as identifying tumors,determining surgical margins,delineating segmental boundaries,and preventing bile leakage. At present,ICG fluorescence imaging is applied to some types of hepatectomy with excellent effect and is expected to assist in generating surgical strategies for liver malignancies. However,its safety and efficacy still need further studies to evaluate.