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Objective:To analyze the clinical and chest CT features in a family with interstitial lung disease(ILD), and assess the probable causative gene mutations for the family.Methods:In order to identify the etiology of the proband′s ILD, the pedigree was investigated.The clinical data of five proband′s pedigree members were collected, and the chest HRCT examination was performed on four proband′s pedigree members with respiratory symptoms.The human whole exon sequencing was performed on the proband′s blood samples, then its deleterious effects were assessed.Subsequently, the strong pathogenic mutation was validated by Sanger sequencing.Results:According to the family survey, there were five patients with ILD in the family, including three males and two females.One of them died.The surfactant protein C(SFTPC)gene(exon4, c.342G>T, p.K114N)was found in all four surviving patients.The mutation was considered to be originated from the father of the proband, and the pathogenic mutation was considered, which was not included in the databases and was a noval mutation.In addition, the clinical manifestations of different patients in the family were significantly different.Conclusion:The novel mutation of p. k114n in SFTPC gene can lead to ILD in children, and the mutation has incomplete exons in family members.Chest CT and whole exon sequencing play an important role in the diagnosis of ILD in children.
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BACKGROUND: Particulated juvenile cartilage allograft is simple and easy to obtain, and relevant clinical studies are underway in the USA. However, how the transplanted juvenile cartilage fragments exert biological effects through biochemical mechanisms and genetic signal transduction is still unclear. There is as yet no report on this technology in China. OBJECTIVE: To explore the feasibility of articular cartilage defects repaired with particulated juvenile cartilage allograft. METHODS: The cartilage fragments were obtained from juvenile Pitman-Moore strains (provided by the Laboratory Animal Center of the Army Medical University in China) and cultured in vitro. Brdu immunofluorescence assay was performed at 1, 3, and 7 days of culture. The particulated juvenile cartilage allograft/fibrin gel composites were subcutaneously transplanted into the SCID rats (provided by the Laboratory Animal Center of the Army Medical University). The specimens were taken for hematoxylin-eosin staining, safranin O staining and immunohistochemistry after 1 month. Cartilage defects of 8 mm in diameter were made in the knee joint of 10 adult Pitman-Moore strains (Laboratory Animal Center of the Army Medical University), and were randomized into two groups, which were then transplanted with the particulated juvenile cartilage allograft/fibrin gel composites (experimental group) or nothing (control group). The specimens were taken for hematoxylin-eosin staining, safranin O fast green staining, toluidine blue and immunohistochemistry at 3 months after transplantation. RESULTS AND CONCLUSION: Little Brdu incorporation was detected in juvenile cartilage fragments at 1 day of culture, some Brdu incorporation was defected at 3 days of culture. At 7 days of culture, a progressive increase in the Brdu signal was detected in chondrocytes within the cultured cartilage fragments, which seemed to localize along the tissue edge. At 1 month after subcutaneous transplantation, the particulated juvenile cartilage allograft still survived and were surrounded by few proliferative chondrocytes. There was no obvious tissue repair in the control group at 3 months after transplantation. In the experimental group, there was obvious tissue repair, the color of the newly formed tissues was similar to the normal cartilage tissue, which integrated well with the surrounding normal cartilage tissue, and the cells distributed evenly. These results imply that particulated juvenile cartilage allograft can achieve good results in repairing articular cartilage defects.
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OBJECTIVE:To evaluate the effectiveness and security of Yishen huashi granules in the adjuvant treatment of chronic nephritis systematically,and to provide evidenced-based reference. METHODS:Retrieved from CBM,CJFD,Wanfang database,VIP,Medline,PubMed,EMBase and Cochrane library,randomized controlled trials(RCTs)about Yishen huashi gran-ules in the treatment of chronic nephritis were collected and related magazines were retrieved by hand. After selection and data ex-traction by 2 researchers independently,the quality of included literature was evaluated according to Jadad rating scale,and Me-ta-analysis was conducted by using Rev Man 5.3.5 software. RESULTS:A total of 8 RCTs were included,involving 1028 patients. Total response rate of trial group [RR=1.33,95%CI(1.24,1.42),P<0.001] was significantly higher than that of control group. 24 h urine protein quantity [MD=-0.32,95%CI(-0.40,-0.24),P<0.001],serum creatinine [MD=-22.38,95%CI(-23.37,-21.39),P<0.001],blood urea nitrogen [MD=-1.45,95%CI(-2.05,-0.84),P<0.001] were significantly lower than control group,with statistical significance. CONCLUSIONS:Based on routine treatment,Yishen huashi granules have good therapeutic ef-ficacy for chronic nephritis,can reduce 24 h urine protein and improve renal function.
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OBJECTIVE:To observe therapeutic efficacies and safety of diltiazem combined with ciclosporine in the treatment of nephrotic syndrome complicated with acute renal injury. METHODS:A total of 66 patients with nephrotic syndrome and cute kid-ney injury were randomly divided into control group(30 cases)and observation group(36 cases). Control group was given routine treatment;observation group was additionally given Diltiazem hydrochloride tablet 5 mg orally,twice a day,and Ciclosporin soft capsules 1.5 mg/(kg·d)orally,twice a day. Treatment course of 2 groups lasted for 20 d. Clinical efficacies of 2 groups were ob-served. The serum creatinine and kidney injury molecule 1(KIM-1),24 h urine volume,24 h urine protein levels,AKI classifica-tion,follow-up and recurrence were observed before and after treatment as well as the occurrence of ADR. RESULTS:The remis-sion rate of observation group was significantly higher than that of control group,and recurrence rate was significantly lower than control group,with statistical significance(P0.05). After 2 weeks and 1 month of treatment of observatiom groups,and after 1 month of treatment of control group,serum creatinine levels,KIM-1 and 24 h urine protein of observation group were significantly lower than before treatment,and the observation group was significantly lower than the control group;24 h urine and the ratio of gradeⅠby AKI classification were significantly more than before treatment,and the observation group was significantly more than the control group,with statistical significance(P0.05). CONCLUSIONS:Based on routine treatment,diltiazem combined with ciclosporin shows significant therapeutic efficacy in the treatment of nephrotic syn-drome and acute renal injury with good safety.
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Objective To analyze the characteristics of chest CT in children with invasive pulmonary fungal infections(IPFIs),and to explore the influencing factors on chest CT manifestations in children with IPFIs.Methods A retrospective case-control study was conducted to select 97 children with IPFIs from October 2010 to October 2016 in the department of respiratory medicine,PICU and hematology.The children were divided into CT characteristic change group(39 cases) and CT non-characteristic change group(58 cases) according to the chest CT manifestations. Non-conditional multivariate Logistic regression analysis was used to identify the independent influencing factors of CT characteristic changes in children with IPFIs. Results The ratios of less than 3-year-old infants, Candida, the proportion of ICU admission in the CT characteristic change group were lower than those in the CT non-characteristic change group(P<0.05). The proportions of more than 3-year-old, neutropenia,Aspergillus,central venous catheter,hematological malig-nancies were higher than those in the CT non-characteristic change group(P<0.05).Multivariate Logistic regression analysis showed that the hematological malignancies was an independent influencing factor for the characteristic changes of CT in children with IPFIs.Conclusion When children with blood system malignant tumors manifest as fever,cough and other symptoms of infection,chest CT manifestations show characteristic changes,Aspergillus infection should be considered,and empirical antifungal treatment should be focused.
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Objective The purpose of the study was to investigate the causes of hemoptysis and ex-plore the diagnostic procedures for hemoptysis in children. Methods The medical records of 42 children with hemoptysis admitted to the Respiratory Department of Hunan Children′s Hospital from June 2012 to June 2015 were collected by a retrospective study. The causes of hemoptysis were classified by pathogenesis,and the diagnosis of hemoptysis was evaluated in this study. The final diagnosis was divided into clear diagnosis and the cause was unknown. Results A total of 41(97. 6%) cases were diagnosed,1(2. 4%) case was not diagnosed. In 42 cases of hemoptysis,infection was the main cause of the disease,including 8(19. 0%) cases of pneumonia and 5(11. 9%) cases of bronchitis,and the following causes were bronchial artery fistula(10/42,23. 8%),idiopathic pulmonary hemosiderosis(8/42,19. 0%),bronchiectasis(5/42,11. 9%),pulmonary vascular malformation with pulmonary hypertension(3/42,7. 2%),pulmonary tuberculosis(2. 4%),bronchi-al foreign body(1/42,2. 4%) respectively. Thirteen cases of respiratory tract infection,and 5 cases of bron-chiectasis were diagnosed by chest CT,10 cases with pulmonary artery fistula were diagnosed by digital sub-traction angiography,8 cases of pulmonary hemosiderosis,1 case of pulmonary tuberculosis,and 1 case with bronchial foreign body were diagnosed by fiberoptic bronchoscopy. Three cases of pulmonary vascular malfor-mation and pulmonary hypertension were diagnosed by row helical CT angiography and cardiac color ultra-sound. Conclusion Hemoptysis in children is a heterogeneous group of respiratory disorders. Most causes could be identified by using the diagnostic procedures. Other factors, including medical history, CT, fiber bronchoscopy,multidetector CT angiography, cardiac color ultrasound and digital subtraction angiography, play important roles in the diagnosis of hemoptysis in children.
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Objective The purpose of this study is to investigate extracorporeal shock waves therapy on Achilles tendopathy and evaluate its short‐term effectiveness .Methods The subjects were out‐patients with Achilles tendopathy who came to center for Joint Surgery ,Southwest Hospital ,from Dec .1st 2012 to Dec .1st 2013 .The main symptom of these patients showed pain at the hock site ,while the pain could be released with rest .Before the treatment ,routine checkups were performed including X‐ray of ankle joint with normal side and MRI ,which brought out a definite diagnosis and evacuated other reasons resulting pain .The treatment of blast was 2 000 pulse per time ,once a week and four times in total .During the treatment period ,patients were suggested to prevent from strenuous exercise and had the anodyne on the evening of the first day when they underwent the shock waves .VAS and AO‐FAS was used to evaluate the effectiveness with the records ,before the treatment ,after four‐time treatment ,after three‐month treatment .Patients′complications and follow‐ups were recorded and VAS results were assessed with statistical analysis .Results 32 patients had full follow‐ups .22 of them had insertion tendopathy .10 patients had non‐insertion tendopathy .8 patients had bilat‐eral lesion and 24 patients had unilateral lesion .Part of erythema appeared in five patients and could be relieved after rest .One pa‐tient achieved pain release after four‐time treatment ,but fell down going downstairs and resulted rupture of tendon .All patients had VAS assessment for three times ,with the score 8 .2 ± 1 .5 before the treatment(P0 .05) .The score of AOFAS were 72 .2 ± 5 .1 ,86 .3 ± 5 .2 and 91 .3 ± 3 .5(P<0 .01) .Conclusion When treating on Achilles tendopathy ,extracorporeal shock wave can improve the local symptoms .With minor trauma and reliable outcome ,it brings patients benefits that treat tendon disease without surgery or postponing the surgery .
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Objective To investigate effect of arthroscopic ankle arthrodesis in the treatment of endstage post-traumatic ankle arthritis.Methods Between July 2007 and December 2010,21 patients with post-traumatic ankle arthritis underwent arthroscopic arthrodesis in our hospital.There were 14 males and 7 females,aged from 21 to 68 years (average,37 years).Before operation,conservative treatments were unsuccessful in all patients.During operation,the articular cartilage was removed completely,and then micro-fracture was made in bone near articular surface.Then,the operating ankle were reduced and fixed provisionally with Kirschner wires.A C-arm X-ray system was used to confirm the reduction of operating ankle,and the operating ankle was fixed with cannulate screws if the reduction was satisfactory.Two patients also underwent arthroscopic subtalar arthrodesis.After operation,the affected ankle was fixed with plaster for six weeks.Then partial weight-bearing were allowed and gradually increased until bone union.Results All patients were followed up for 1 to 4 years (average,1.8 years).All affected ankle achieved bone union after 10 to 16 weeks (average,12 weeks).No early complications occurred,such as poor wound healing and infection.Subtalar arthritis with pain occurred in 3 patients; the symptom relieved in 2 of them after conservative treatment and in 1 patient after subtalar arthrodesis.The VAS score improved from preoperative 8.1±1.5 to 2.7± 1.1 one year postoperatively,which showed statistical significance (t=3.153,P=0.005).Conclusion Arthroscopic ankle arthrodesis provides an alternative method for treating end-stage post-traumatic ankle arthritis,which has some advantages,such as less surgical trauma,more beautiful incision and higher fusion rate.However,it needs special equipments and a learning curve.
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Objective To explore the clinic effect of arthroscopic in the treatment of Haglund deformity.Methods Sixteen patients with Haglund deformity were treated with arthroscopy from June 2009 to December 2011,including 7 males and 9 females,with an average age of 28.8 years (range,17-39 years).All 16 patients were suffered ankle back pain,exacerbations of pain during active and passive plantar flexion.This group of patients was chosen arthroscopic surgery to treat Haglund deformity as conservative treatment was invalid.With the prone position for surgery,we selected two approaches next to the Achilles tendon.Use the C-arm X-ray fluoroscopy observed calcaneus orthopedic during the operation.From the posteromedial approach to the posterolateral approach to alternately use the shaver and ArthroCare to clean up the front of the inflammation of the Achilles tendon bursa,by which could form arthroscopic operations security zone.All operating equipment was on the back toward the Achilles tendon,which could maximize the protection Achilles tendon.Postoperative plaster or brace short brake was used for two weeks.16 cases of postoperative patients were followed up； the mean follow-up time was 13 months (9-18 months).According pain visual analogue scale (VAS) and the American Orthopaedic Foot and Ankle (AOFAS),the clinic effects were evaluated.Results At the last follow-up,the AOFAS hindfoot score of 91.5±2.8 was significantly higher than the preoperative 71.0±3.7 (t=17.38,P=0.014),postoperative VAS score 1.3±0.6 was significantly lower than the preoperative 5.10±0.44 (t=19.20,P=0.022).Conclusion The treatment of Haglund deformity by means of arthroscopic minimally invasive,with smaller trauma,faster recovery and lower complications,is effective and safe in clinical practice.However,dues to its steep learning curve,this method requires doctors to carry out who had relatively large arthroscopic surgery experience.
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Objective To introduce the experience of improved posterolateral mini-incision total hip urthroplasty(THA)in treatment of femoral neck fractures.Methods Of 199 patients(207 hips)treated with preliminary THA from October2002 to January 2005,them were46 patients(46 hips)with femoral neck fractures including31 fresh fractures and 15 old ones,which were then treated with posterolateral mini-incision THA.An observation was done on length of incision,operation time,volume of blood loss,drainage volume,hospital stays,postoperative complications,functional recovery and Harris score.Results All patients were followed up for 14-26 months(mean 17.2 months).The final Harris score during follow-up was(84.1±8.6)points in the fresh fracture group and(85.8±7.6)points in the old fracture group.Pestoperative X-ray showed sound position of the prosthesis.There was no statistical difference upon length of incision,operation time,blood loss,drainage volume and hospital stays between fresh fracture group and old fracture group(P＞0.05).Dislocation occurred in one patient in each group.Conclusion Posterolateral mini-incision THA is proved to be successful in reducing surgical trauma,accelerating rehabilitation and decreasing blood loss and complications for patients with femoral neck fractures.
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BACKGROUND: Chitosan-disodium β-glycerol phosphate (C/GP) gel has been shown to be compatible with the entrapment of viable chondrocytes, and bone marrow mesenchymal stem cells (BMSCs) are considered to be the potential cells used in tissue engineering. This experiment is aimed to observe the cytocompatibility of BMSCs with C/GP gel.OBJECTIVE: To study the effect of C/GP gel on the growth, proliferation and chondrogenic differentiation in vitro cultured BMSCs and explore a new carrier for the application of cartilage tissue engineering.DESIGN: Completely randomized controlled experiment.SETTING: Department of Bone and Joint Surgery, Affiliated Hospital of Luzhou Medical College; Center Laboratory of Southwest Hospital Affiliated to the Third Military Medical University of Chinese PLA.MATERIALS: The experiment was performed in Center Laboratory of Southwest Hospital Affiliated to the Third Military Medical University of Chinese PLA between October 2005 and April 2006, Six adult female mini-pigss were employed. C/GP gel is prepared by mixture the HCI solution of chitosan with salt solution of β-glycerol phosphate, allowed gel at 37 ℃ in incubator for about 5 to 10 minutes.METHODS: ① BMSCs culture: 4-6 mL of bone marrow harvested from the posterior superior lilac crest were plated at 20 ×10<'6>/100 mm dish and then grown for 14 days in complete media, consisting of DMEM/F-12 supplemented with 10% fetal ovine serum. Cells were harvested and re-seeded for subculture. ② BMSCs differentiation assays: Osteogenic differentiation was assessed by histologic detection of alkaline phosphatase activity and calcium in cultures under osteogenic conditions. Chondrogenic differentiation was evaluated by histology for toluidine blue and immunohistochemistry for type Ⅱ collagen in cultures under chondrogenic conditions. ③ In vitro assays, expanded BMSCs were suspended in C/GP solution and allowed gel at 37 ℃ in incubator for about 5 to 10 minutes, then cultured under chondrogenic conditions for 3 weeks. Cells attached to and viability in C/GP gel was monitored with the aid of an inverted light microscope. Chondrogenic differentiation of cell in C/GP gel were assessed by histological and immunohistocbemistry. The cell proliferated was monitored by MTT after 2, 5, 8 days seeding.MAIN OUTCOME MEASURES: ① Characterization of mini-pigs' BMSCs; ② BMSCs attached to and viability in C/GP gel; ③ Chondrogenic differentiation of BMSCs in C/GP gel; ④ BMSCs proliferated in C/GP gel.RESULTS: ① Characterization of mini-pigs' BMSCs: Cultured BMSCs showed fibroblastic morphology and were able to differentiate to chondrocytes or osteogenic cells under chondrgenic or osteogenic cultured condition respectively. ②BMSCs attached to and viability in C/GP gel: BMSCs attached to and remained > 90% viable in C/GP gels immediately post-casting, and throughout the 21 days, using MTT staining. ③ Chondrogenic differentiation of BMSCs in C/GP gel: During 21 days culture period in vitro, chondrogenic induced BMSCs produced amounts of de novo cartilage matrix in the chitosan, as assessed by histological and biochemical criteria. ④ BMSCs proliferated in C/GP gel: Chondrogenic induced BMSCs cultured in C/GP gels continued to proliferate. There was a significant difference among the values of optical density in the cells-gel constructs compared to the controls without cells after 2, 5, and 8 days of culture (P<0.05).CONCLUSION: It is confirmed that C/GP gel shows good cytocompatibility with BMSCs and contributes to the growth, proliferation and chondrogenic differentiation for BMSCs in vitro culture. C/GP gel can be a potential cell-carrier for tissue engineering of articular cartilage.
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Objective To investigate the value of microsurgical management for the diagnosis and treatment of pigmented villonodular synovitis(PVNS)of the knee.Methods Thirty-eight patients with PVNS of the knee that were confirmed by arthroscopy were treated in our unit between January 2002 and April 2006.Among the patients,5 were referred from other hospitals because of postoperative recurrence.Villusectomy was performed in each of the patients by using arthroscopy.In the cases with larage extra-articular lesions,small auxiliary incision was made for complete resection.All the resected masses were examined pathologically after the surgery,and the patients received intra-anticular drainage,local ice therapy,and functional exercises afterwards.Results Unilateral surgery was performed on this group of patients.Under an arthroscope,the synovium showed characteristic yellow-brown color.Patholgocial examination confirmed PVNS in all the cases,including 20 cases of local PVNS and 18 diffused lesions.Open surgery was performed on 6 patients owing to large lesion at the popliteal fossa.According to the International Knee Documentation Committee(IKDC)Scoring Forms,the mean IKDC score increased from 60.4?6.1 to 89.3?7.2 in one year after the operation.The 38 patients were followed up for 1 to 4 years(mean 2.1 years),none of them had recurrence during this period.Two of the patients,who had been treated by open surgery and then were referred to our hospital,could not flex their knees to 90? after the microsurgery.Whereas,all the others achieved normal knee flexion.Conclusions Arthroscopy is reliable for the diagnosis and treatment of PVNS.For large extra-articular lesions,open surgery using small auxiliary incision is necessary for complete resection and avoidance of recurrence.
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BACKGROUND: Rapid development of tissue engineering is the new hope of repairing bone defect so as to obtain complete bone regeneration,and rapid proliferation of seed cells is one of the important factors in it.OBJECTIVE: To evaluate the proliferation and osteogenic differentiation of human mesenchymal stem cells (MSCs) plated at different cell density during subculturing period.DESIGN: Repetitive measurement.PARTICIPANTS: The experiment was conducted in the Trauma, Burn and Combined Injury Laboratory of the Third Military Medical University of Chinese PLA between January 2003 and March 2004. MSCs were obtained from iliac bone bone marrow of the 5 healthy male volunteers by separation and proliferation.METHODS: The MSCs of second generation were inoculated at 8×103/cm2,3×103/cm2, and 8×102/cm2, respectively, and then the growth curve was drawn and analyzed. After 18 days of proliferation and culture, the increased amount of MSCs was recorded to analyze the post-proliferation growth curve and osteogenic ability.MAIN OUTCOME MEASURES: ①Growth curve of cells plated at different cell density; ②Results of alkaline phosphatase(ALP) staining and immunohistochemical staining of osteocalcin.RESULTS: Human MSCs from bone marrow were CD34 negative and expressed low level of ALP. Population doubling time was 40 hours after MSCs were plated at 8×103/cm2 and the number of the cells was expanded (51±13) times after 18 days. MSCs were expanded (28±6) times 18 days after plated at 3×103/cm2. While plated at 8×102/cm2, the number of the cells was only expanded (5±3) times. Proliferative ability of cells cultured at a low density was stronger that that at a high density. MSCs could be induced to differentiate into the osteocytic lineages after plated at not only 8×103/cm2 but also 8×102/cm2.CONCLUSION: Cell density plays an evident role in the proliferation of MSCs. Cell density of 8×103/cm2 is proper to the rapid proliferation of MSCs as seed cells in bone tissue engineering.
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Objective To investigate the effect of goat autologous serum at different concentrations on the proliferation of bone marrow-derived mesenchymal stem cells(bMSCs) for optimal serum dose.Methods Autologous serum was prepared from 6 goats at 12 months old,and their bMSCs were isolated from bone marrow.Then the obtain bMSCs were cultured in DMEM/F12 medium with supplement of 5%,10%,or 15% of corresponding autologous serum,and 10% fetal bovine serum served as control.The morphology of bMSCs,cells counting and MTT assay were observed or carried out.Results Morphology of the bMSCs in the different groups were similar.The proliferation of 5% autologous serum group was slower compared with that of 10% fetal bovine serum group(P
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Objective To develop a cryogenic gripper for soft tissues used in tensile test for secure fixation of soft tissues without damages.Methods Based on the principle of coolant evaporator,we reconstructed copper pipes in novel architecture for fixing the soft tissues.Results This cryogenic gripper could firmly grip wet nylon thread of 3 mm in diameter and its holding force was(499.14?1.05)N and its temperature could be kept at(-20?1)℃.Conclusion The function of this gripper developed by coolant cryogenic technology is satisfactory and reliable,and its continuance is not concerned with time.
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Objective To observe the biological behavior of chondrocytes in chitosan based hydrogel in vitro and to evaluate the possibility of chitosan and glycerophosphate mixed gel using as injectable scaffolds in tissue engineering.Methods A novel injectable thermosetting gel was made of chitosan and glycerophosphate mixture.Chondrocytes isolated by enzymic digestion from the articular cartilage of the young rabbits aged 3-4 weeks were cultured in monolayer system.After primary culture and subculturing,the cells were seeded in chitosan based gel in concentration of 5?10~7/ml in vitro.Characteristics of chondrocytes during 4-week culture were observed with invert microscope.MTT was used to detect the seed growth after one-week culture.In 4th week,after haematoxylin eosine and toluidine blue staining,the artifical cartilage was performed type Ⅱ collagen immunohistochemistry and observed by scanning electron microscope.Results Chondrocytes retained their round morphology,multiplied,and produced matrix in chitosan and glycerophosphate mixture gels.The results of immunohistochemistry were strongly positive.Conclusion That most chondrocytes appeared to occupy large areas of rough chitosan based gels,guarantees a suitable environment where chondrocytes secrete matrix macromolecules and preserve their round morphology in vitro.Chitosan and glycerophosphate mixture gel may be a vehicle for injectable tissue-engineered cartilage.
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Objective To use the new technique of seeding cells labeled with fluorescent protein for monitoring the construction process of tissue-engineering bone in vitro.Methods Human bone marrow stromal cells(BMSCs)were isolated and culture-expanded from femoral marrow.BMSCs were transfected with the recombinant retrovirus pLEGFP-Nl containing enhanced green fluorescent protein(EGFP).Those expressing EGFP were cultured in the experiment groups,and the unmarked BMSCs were in the control groups.The cell-scaffold complexes were constructed with BMSCs and hydroxyapatite in vitro.Some complexes were used to assess the adhesion efficiency and the others were cultured and observed under fluorescence microscope for four weeks.Results EGFP was successfully expressed after BMSCs were transfected with the retroviral vector pLEGFP-N1.The labeled cells were easy to observe while the cell-scaffold complexes were constructed and cultured.The adhesion efficiency was(90.3?2.1)%for the group of labeled BMSCs and(92.0?1.5)%for the control group,so there was no significant difference between the two groups(P=0.236).Conclusions After BMSCs are transfected with the recombinant retrovirus containing EGFP,the adhesion of cells will hardly be affected so that seeding cells labeled with fluorescent protein can well be used for monitoring the construction and culture of tissue-engineering bone in vitro.