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Objective:To investigate the clinical efficacy of arthroscopic surgery for the treatment of femoral acetabular impingement (FAI) in athletes.Methods:A total of 18 FAI athletes (athlete group) who underwent hip arthroscopy in the Department of Sports Medicine, Peking University Third Hospital from April 2014 to June 2021 were retrospectively analyzed, including 12 males and 6 females, aged 20.44±3.45 years (range, 15-27 years). According to gender, age, body mass index and follow-up time, 36 non-athlete FAI patients (non-athlete group) were matched at a ratio of 1∶2 by propensity score matching method. There were 18 males and 18 females, aged 20.81±4.68 years (range 14-31 years). The hip pain visual analogue scale (VAS), modified Harris hip score (mHHS), hip outcome score-activity of daily living scale (HOS-ADL) and hip outcome score-sports scale (HOS-SS) scores were compared between the two groups before and after surgery. The minimal clinically important difference (MCID) and patient acceptable symptomatic state (PASS) were also compared between the two groups.Results:All patients successfully completed the surgery and were followed up for 33.56±19.20 months (range, 24-77 months). The VAS score at the last follow-up decreased from 6.22±1.52 points before surgery to 1.28±1.67 points in the athletes group, and decreased from 6.28±1.37 points before surgery to 1.67±1.69 points in the non-athletes group. There was no significant difference between the two groups ( P>0.05). The mHHS score at the last follow-up increased from 65.53±12.90 points before surgery to 92.28±13.59 points in the athletes group, and increased from 61.01±11.96 points before surgery to 86.82±11.98 points in the non-athletes group. There was no significant difference between the two groups ( P>0.05). The HOS-ADL score at the last follow-up increased from 72.77±18.86 points before surgery to 94.00±11.36 points in the athletes group, and increased from 70.35±13.12 points before surgery to 90.78±9.36 points in non-athletes group. There was no significant difference between the two groups ( P>0.05). The HOS-SS score at the last follow-up increased from 49.77±22.93 points before surgery to 87.28±17.62 points in the athletes group, and increased from 44.08±19.66 before surgery to 72.57±20.16 in the non-athletes group. The HOS-SS scores in the athletes group at the last follow-up were higher than those in the non-athletes group ( P<0.05). Furthermore, 61% (11/18) in the athletes group achieved MCID in HOS-ADL after surgery, which was lower than the non-athletes group's 81% (31/36), with a statistically significant difference (χ 2=4.339, P=0.037). Conclusion:Hip arthroscopy in the treatment of FAI in athletes can achieve satisfactory pain relief and motor function.
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Objective To evaluate the clinical effect of arthroscopic treatment of femoroacetabular impingement syndrome(FAI) for patients over 50 years old,and explore the occurrence regularity and treating rules for such a disease.Methods The clinical data of 71 patients(78 hips with FAI) over 50 years old who underwent arthroscopic treatment for FAI in our department between May 2012 and May 2017 were studied retrospectively.Physical examination,X-ray and CT 3D scans were made preoperatively for explicit diagnosis.The follow-up period ranged from 6 to 66 months,with an average of 31.78 ± 18.07 months.Every patient had a joint space greater than 2 mm,and a grade Ⅰ or Ⅱ hip osteoarthrosis according to the Trnnis scale.Under the hip arthroscopy the synovial hyperplasia was cleaned,the damaged labrum and cartilage were repaired,and the femoroacetabular hyperplasia and the impingement factors were removed to restore the normal shape of femoroacetabular.The joint clearance,changes ofthe alpha angle when at Dunn position and centre edge(CE) angle at normotopia on the X-ray,the intraoperative injuries of cartilages and glenoid labrum and surgical satisfaction and complications were measured and recorded.The modified Harris hip score(mHHS) and visual analogue scale(VAS) were used to evaluate the hip function recovery and pain relief of patients.Results The average age of the patients was 55.15 ± 5.02 years old,ranging from 50 to 69.Among the 23 males and 48 females,there were 33 left hips with FAI and 45 right hips with FAI.The average preoperative joint clearance was 4.81 ± 0.87 mm,and all incisions were healed by first intention after the treatment.The average α angle of the patients decreased from 50.11 ± 4.75 to 42.72 ± 4.7 degrees after the treatment,with the α angle of 7 patients(8.97％) bigger than 55 degree,and that of 40 patients(51.28％) smaller than 50 degree.The average CE angle decreased from 36.54 ± 9.14 degrees to 35.19 ± 8.55 degrees after the treatment,with that of 27 patients(34.62％) bigger than 40 degrees.Before the treatment,the main clinical manifestations were hip pain and swelling,including 36 cases(46.15％) with hip joint lock,70 (89.74％) with groin tenderness.Moreover,75 cases(96.15％) were positive in hip adduction internal rotation test(FADIR) and 64 cases(83.33％) were positive in the hip abduction and external rotation impingement test.However,the pain was relieved or disappeared after the treatment.The average VAS score decreased significantly from preoperative 4.42 ± 1.42 points to 1.31 ± 1.28 at the last follow-up,while the average mHHS score increased significantly from preoperative(52.4 ± 19.38) points to(81.72 ± 10.82) during the last follow-up,and the difference was statistically significant (P＜0.01).Significant improvement was observed in the mHHs and VAS scores of 89％ patients(P＜0.01).1 patient(1.28％) underwent hip replacement during the follow-up period.No serious complications occurred.Conclusion In most cases,arthroscopic treatment of FAI in old patients(over 50 years old),who were with osteoarthrosis and hip labrum injury,can significantly improve the joint function and relieve pain.It is a treatment with safety.
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BACKGROUND: Oxygen-glucose depdvation (OGD) in cultured neurons simulates stroke to a certain degree and plays an important role in studying processing and pathophysiological mechanism of ischemic neuronal injury.OBJECTIVE: To produce experimental OGD models in cultured neurons.DESIGN, TIME AND SETTING: A grouping controlled study was performed at the Center Laboratory of Third Hospital, Peking University from January 2007 to March 2008.MATERIALS: Fetal Wistar rats with gestational age of 17-19 days were collected in this study.METHODS: Primary cultures of cortical neurons that were derived from fetal Wistar rats with gestational age of 17-19 days were performed to remove pollutional non-neuronal cells. OGD was produced by incubation with non-glucose balanced salt solution and 2% Oxyrasa in 7-day cultured cortical neuron cultures. Cell cultures were kept in a humidified 37 ℃ incubator. In the control group, cell culture medium was replaced with balanced salt solution containing 20 mmol/L glucose. In the sham operation group,balanced salt solution containing 20 mmol/L glucose and Oxyrasawere used to replace the medium.MAIN OUTCOME MEASURES: Oxygen concentration in the culture medium was measured with blood gas analysis; neuronal death in the experimental group was observed under phase contrast microscope; lactate dehydrogenase activity was detected with lactate dehydrogenasa assay; effect of oxygen-glucose deprivation on neuronal viability was observed with trypan blue staining.RESULTS: Measurement of oxygen concentration showed that hypoxia could be quickly achieved shortly after the addition of Oxyrase; lactate dehydrogenase assay revealed that after treatments of neuron cultures with Oxyrase and non-glucose balanced salt solution, lactate dehydrogenase release increased significantly with the treatment time; trypan blue staining and phase contrast microscope showed that cell viability decreased after treatments of Oxyrase and non-glucose balanced salt solution, and most neurons died 6 hours after OGD.CONCLUSION: These results show that Oxyrase, together with non-glucose balanced salt solution, can be conveniently used to produce OGD condition in cultured neuronal cells which is greatly useful in the study of simulating cerebral ischemia in vitro.
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BACKGROUND: Bone marrow mesenchymal stem cells(MSCs) have been investigated initially. Because both fat tissue and bone marrow are tissues originated from mesoderm, so whether MSCs could be obtained from fat tissue as well, which also have multi-lineage differentiation potential?OBJECTIVE:To investigate the basic biological characteristics of adipose MSC and its differentiation into osteoblast under given culture condition for the exploration of its feasibility as seed cell in bone tissue engineering.DESIGN: A randomized and controlled study based on cells.SETTING: Department of Orthopaedics of an Affiliated Hospital of a university.MATERIALS: The study was conducted in the Department of Orthopaedics of the Third Hospital of Peking University. Adipose MSC extracted from the fat tissue of Lewis rats was used as subject.METHODS: Adipose MSCs were obtained from inguinal fat pads of Lewis rat after digestion, which were induced into adipocytes and osteoblasts with adipose and osteogenesis induced culture mediums. The differentiations were examined with cytochemical staining, immuncytochemical staining and Western blotting.MAIN OUTCOME MEASURES: Morphological and biological characteristic of adipose MSCs, and the specific mark of osteoblast after induction.RESULTS: Adipose MSCs were obtained from rat adipose tissue culture,which appeared fibroblast-likely in the culture in vitro, and could stably proliferate and passage in vitro. Primary adipose MSCs could differentiate into adipocytes spontaneously, and passaged cells could form fat drop under the reaction of insulin and dexamethasone, and then differentiate towards adipocytes after the expression of peroxidase proliferation activated receptor ?(PPAR-?) enhanced. There was significant difference between induction group and control group in alkaline phosphatase(ALP) activity detection under the induction of dexamethasone, ascorbic acid, and ?-sodium glycerophosphate(P ＜ 0.01) . Calcium node appeared in yon Kossa staining. Result of osteopontin (OPN) immunocytochemcial staining was positive,and OPN expression was detected by Western blotting after induction.CONCLUSION: MSCs with multi-lineage potential can be obtained from rat adipose tissue, and differentiate into adipocytes and osteoblasts after inductions. Therefore, adipose MSCs can possibly be served as one of optimal seed cells for bone tissue engineering.
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Aim To investigate the neuroprotective effect of verbascoside,one of the phenylethanoids isolated from the stems of Cistanche salsa,on MPP+-induced injury in SHSY5Y cells.Methods SHSY5Y cells were exposed to various doses of verbascoside for 12 h,and then treated with 200 ?mol?L-1 MPP+ for 24 h.The cell viability was observed with MTT assay;reactive oxygen species,the mitochondrial membrane potential and the percentage of apoptosis were measured by flowcytometer;the activation of caspase-3 was measured with the caspase-3 activity assay kit;the expression of Bcl-2 was measured with Western blot.Results Following treatment with MPP+ for 24 h,MPP+ induced a significant decrease of cell viability;apoptosis percentage were 38.9%;accumulation of intracellular ROS,increase of caspase-3 activity and the decreases in mitochondrial membrane potential were detected.However,pretreatment with verbascoside (0.1,1 or 10 mg?L-1) for 12 h exhibited cytoprotective effects in a dose-dependent manner.Verbascoside obviously enhanced cell viability,and significantly reduced the number of cells labeled with Annexin-V.The percentage of apoptosis neurons was significantly decreased to 29.5%,15.3% and 8.6% respectively.Flowcytometer showed the verbascoside attenuated the accumulation of ROS and the MPP+-induced collapse of mitochondrial membrane potential in SHSY5Y cells.And significant decreases were detected in caspase-3 activity compared with the MPP+-treated cells at the same time point.Moreover,pretreatment with verbascoside promoted the expression of Bcl-2.Conclusions verbascoside had the neuroprotective capacity to antagonize MPP+-induced apoptosis in SHSY5Y cells,and might be useful in treating Parkinson disease.
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AIM: To investigate the neuroprotective effect of tubuloside B,one of the phenylethanoids isolated from the stems of Cistanche salsa,on H2O2-induced injury in PC12 cells.METHODS: PC12 cells were exposed to various doses of tubuloside B for 12 h,then treated with H2O2 at concentration of 100 ?mol/L for 24 h.The cell viability was observed with MTT assay.Reactive oxygen species and the mitochondrial membrane potential were measured with laser scanning confocal microscopy(LSCM).The DNA content and percentage of apoptosis were assayed by DNA agarose gel electrophoresis and flow cytometry.The activation of caspase-3 was detected with the caspase-3 activity assay kit.RESULTS: Following treatment with H2O2 for 24 h,H2O2 induced a significant decrease in cell viability;DNA ladder was observed and apoptosis percentage was as high as 48.0%.Accumulation of intracellular ROS,increase in caspase-3 activity and the decrease in mitochondrial membrane potential as indicated with the decrease of red/green ratios(from 5.97 to 0.41) were detected.However,pretreatment with tubuloside B(1,10 or 100 mg?L-1) for 12 h exhibited cytoprotective effects in a dose-dependent manner.Tubuloside B obviously enhanced the cell viability,reduced formation of the DNA ladder,and significantly reduced the number of cells labeled with Annexin-V.The percentage of apoptosis/necrosis neurons was significantly decreased to 30.9%,18.3% and 6.2%,respectively.LSCM showed that the tubuloside B attenuated the accumulation of ROS and the H2O2-induced collapse of mitochondrial membrane potential in PC12 cells.The significant decrease in caspase-3 activity was detected,compared to the H2O2-treated cells at the same time point.CONCLUSION: Tubuloside B has the neuroprotective capacity to antagonize H2O2-induced apoptosis and injury in PC12 cells,indicating it may be useful for treating some neurodegenerative diseases.