BACKGROUND: Bone marrow mesenchymal stem cells (MSCs) have multi-differentiation potential. In the acute wound, MSCs have been demonstrated to have the potential for differentiating into skin cells. However, there are few reports regarding its differentiation in diabetic wound.OBJECTIVE: To observe the feasibility of differentiation of MSCs into the cells of skin appendages under the microenvironment of diabetic wound.METHODS: MSCs were isolated from the bone marrow of rats, purified and cultured. Third or fourth passage MSCs were selected and labeled with 5-bromodeoxyuridine (5-BrdU). The rats were injected intraperitoneally with single administration of streptozocin to establish diabetes model. After 2 weeks, a round skin wound was made on the dorsal back of rats. BrdU-labeled MSCs at a density of 1×10~9/L were injected into the wound of the rats. The specimens were harvested from the wound tissues to prepare sections at 2 and 3 weeks after transplantation, followed by immunohistochemical staining with BrdU or keratin. RESULTS AND CONCLUSION: BrdU positive cells aggregated in the epidermis, dermis and hypodermia. Some positive cells appeared in the sebaceous glands and sebaceous duct cells and expressed keratin simultaneously in serial sections. During diabetic wound healing, MSCs have the potential to differentiate into the cells of the skin appendages.

Objective To offer decision support for reasonable allocation of medical resources by analysis of the present resources allocated.Methods Lorenz curve and Gini coefficient method were called into play.This paper studied such medical resources as the practicing doctors,registered nurses,medical institutions and hospital beds,from both the population distribution and geographical distribution aspects.The purpose is to compare the allocation in these municipalities (Beijing,Tianjin,Shanghai and Chongqing).Results If the Lorenz curve is drawn based on the total population served with such resources,the Gini coefficients indieate relatively balanced allocation of medical institutions,practicing physicians,and registered nurses in the municipalities,and highly balanced allocation of hospital beds.If the curve is drawn based on geographical distribution,the Gini Coefficient indicates relatively balanced allocation of medical institutions allocation in these municipalities,yet considerable difference in the allocation of practicing physicians,registered nurses,and hospital beds.Conclusion The study shows that medical resources allocation in China in these municipalities mirrors the condition of Priority to population density,and neglect of geographical distribution.It also reveals poor equity in the geographical distribution of medical resources,which plagues accessibility of medical resources.

Objective To establish the GFR reference range of solitary kidney by 99 Tcm?DTPA SPECT imaging and explore factors influencing renal compensation. Methods A total of 108 patients ( 62 males, 46 females, age range:5-83 (47±19) years) with only one functional kidney who underwent 99Tcm?DTPA dynamic imaging from January 2011 to September 2015 were retrospectively analyzed. The GFR was measured to establish the reference range. Meanwhile, the potential influence factors were analyzed, inclu?ding age, gender, location of the functional kidney, removal and causes of the non?functional kidney. Two?sample t test, one?way analysis of variance and Bonferroni test were used. Results The GFR were (71.81± 23.23) ml/min in the 108 patients. There were no significant differences of GFR between male and female patients ( t=0.496) , between patients with left functional kidney and those with right functional kidney( t=0.999), between patients with and without removed non?function kidney(t=-1.966), and among patients with different causes of the non?function kidney( F=1.894;all P>0.05) . The GFR was significant different in different groups based on age( F=13.924, P<0.001) . There was a negative correlation between the GFR and age( r=-0.570, P<0.001) . The GFR CV in different age groups (≤20 years, 20 years60 years) were 37.6%,26.7%,21.3%,30.1%, respectively. Conclusions It is objective and efficient to assess the renal compensation by establishing the reference values for GFR of the solitary kidney. There is a negative correlation between age and renal compensation, and the variation of renal compensation is larger in younger patients.

Objective To investigate the anti-HBs level in 15 years after vaccination in adults and newborns in Beijing and provide the suggestion for the adult hepatitis B (HB) immunization plan.Methods A serological survey was conducted in 6 705 subjects aged > 1 year old by multistage randomized cluster sampling in Beijing during August 2013 to February 2014.The subjects who had received a 3-dose recombination HB vaccine when they were newborns or adults aged ≥15 years old and did not undergo revaccination were selected.Antibody to hepatitis B surface antigen (anti-HBs) titers and positive rates in 15 years after vaccination were evaluated.Results A total of 129 and 463 subjects who were vaccinated in adults and newborns were enrolled in the study.Based on the self-limited rate(30%) of HBV infection among the general population aged 15 to 59 years, anti-HBs positive rates for the subjects vaccinated in adults were estimated to be 58.6%,62.5 % and 48.4% during 0-4, 5-9 and 10-15years after vaccination respectively.The corresponding median of anti-HBs titers were 288.8, 120.6 and 62.6 mIU/mL.The anti-HBs positive rates for the subjects vaccinated in newborns during 0-4, 5-9 and 10-15 years after vaccination were 83.3%, 47.3% and 43.5%, respectively.The corresponding anti-HBs titers were 71.8, 8.9 and 6.7 mIU/mL.Conclusions The protection afforded by primary immunization with recombination vaccine in adults and newborns lasts at least 15 years.

Objective To investigate the effects of keratinocyte growth factor (KGF) and KGF receptor (KGFR) antisense oligonucleotide (ASODN) on cell cycle and apoptosis of HaCat cells. Methods HaCaT cell, an immortalized keratinocyte cell strain, was cultured in vitro. Flow cytometry was used to measure the cell cycle and apoptosis mediated by KGF and ASODN. Results The rates of S phase and apoptosis in the group treated with KGF increased significantly than those in the control group (both P

Objective To explore the constitution characteristics of patients with uterine fibroids.MethodsA total of 413 patients with uterine fibroids (patient group) and 413 healthy women (control group) were enrolled in this case-control study. All the participants were required to fill in a questionnaire on Chinese Medicine constitution.The frequency and percentage of indicators were calculated,and analysis of variance and Chi-square test were used to find difference between the two groups.Results The incidence of Qi-stagnation constitution in the patient group was higher than that in the control group (x2 =8.209,P ＜ 0.05 ). The incidence of menstrual abnormalities was increased in patients with constitution of Phlegm-dampness and Dampness-heat,Qi-stagnation and Blood-stasis.The detection rate of hypertension of the patient group was also significantly increased.ConclusionThe most common constitution of patients with uterine fibroid is Oi-stagnation.

Objective To evaluate the correlations of vascular structures,hemodynamic changes and recanalization before receiving carotid endarterectomy ( CEA) in patients with subtotal or complete occlusion of carotid artery using color Doppler flow imaging (CDFI) and transcranial Doppler (TCD) ultrasonography. Methods A total of 107 patients were diagnosed as subtotal ( stenosis rate 95% to 99%) or complete occlusion of carotid artery with DSA and treated with CEA at Beijing Xuanwu Hospital, Capital Medical University from January 2005 to January 2014 were enrolled retrospectively. The mean age of patients was 61 ± 9 years. According to the findings of DSA,they were divided into either a carotid artery subtotal occlusion group (n=63) or a complete occlusion group (n=44). The vascular diameter,the locations of the lesions ( internal carotid artery or common carotid artery) ,the lumen echo characteristics,and whether internal-external artery collateral circulation patent or not at different stages in patients of both groups were documented. Results The lumen diameter of distal segment was significant wider in patients of the complete occlusion group compared with the subtotal occlusion group (4. 1 ± 1. 1 mm vs. 3. 2 ± 0. 8 mm). There was significant difference between the 2 groups (P <0. 01). There was no significant difference between the location of occlusion and the recanalization rate (P=0. 460). The recanalization rate of the lumen homogeneous echo ( hypoecho and echodense) filling patients (94. 1% vs. 86. 7%) was significantly higher than that of the patients of heterogeneity echo. In patients with complete occlusion of internal carotid artery,the recanalization of CEA would increase when the internal-external collateral arteries were patent. For general comparison,the recanalization rate of the subtotal occlusion group was significantly higher than that of the complete occlusion group (P<0. 01). Conclusion The carotid artery diameter normal or broadening ,the homogeneous echo in the occlusive lumen and the internal-external collateral arteries patency are closely associated with the recanalization rate. The preoperative ultrasonography has great value for the assessment of recanalization of carotid artery occlusive disease after CEA.

BACKGROUND:Currently, there is no effective treatment for keloids that often recur. Its pathogenesis is stil entirely unclear, and fibroblast proliferation and apoptosis have become a research hotspot.
OBJECTIVE:To investigate the expression of Livin, Smac and Caspase-3 in keloids and to analyze their relationship so as to preliminarily explore the significance of Livin, Smac and Caspase-3 in the pathogenesis of keloids.
METHODS:RT-PCR and immunohistochemical methods were used to detect the mRNA and protein expressions of Livin, Smac and Caspase-3 in keloids (n=20) and normal skin tissues (n=20).
RESULTS AND CONCLUSION:Compared with the normal skin tissue, the mRNA and protein positive expressions of Livin were significantly higher in keloids (P < 0.05), while the mRNA and protein positive expressions of Smac and Caspase-3 were lower in keloids (P < 0.05). There was a negative association between Livin and Smac, Caspase-3 protein expression in keloids. These findings indicate that the high mRNA expression of Livin may cause the imbalance between proliferation and apoptosis of fibroblasts by inhibiting the mRNA expression of Smac and Caspase-3, and eventualy lead to the formation of keloid.

Objective To compare and analyze the occurrence of delayed cerebral ischemia(DCI)after coiling and clipping of intracranial aneurysms, and explore the risk factors of DCI. Methods A total of 236 patients with aneurysms diagnosed by CT angiography (CTA) or digital subtraction angiography (DSA) in Department of Neurosurgery, Tianjin Medical University General Hospital were enrolled in this study from March 2011 to May 2014. Patients were divided into clipping group(n=135) and coiling group(n=101). The clinical characteristics were compared between two groups, including gender, age, medical history, GCS score, Hunt-Hess grade, Fisher grade, WFNS grade, aneurysm location, prognosis and incidence of DCI. Risk factors for DCI were investigated by Logistic regression analysis. Results DCI was occurred in 36 patients (26.7%) underwent clipping operation while in 11 patients (10.9%) underwent coiling operation. The incidence was significantly higher in clipping group compared with that of coiling group (P <0.01). The patients were followed up for 6 months. The poor prognosis rates were 17.0%and 25.7%in clipping group and coiling group, respectively (P>0.01). The overall mortality was 11.0%, the former had a lower mortality rate (5.9% vs. 17.8%, P <0.01). According to Logistic regression analysis, Fisher Grade 3-4, postoperative pulmonary infection and surgical procedure were independent risk factors for DCI (P<0.01). Conclusion DCI is one of the most significant factors for high fatality and morbidity of postoperative aneurysm patients. There is a low occurrence of DCI after coiling compared with that of clipping. If we pay more attention to risk factors associated with the DCI, it will improve the prognosis of postoperative aneurysm patients greatly.

Objective To investigate the expression of chemokine receptors CXCR1and CXCR2in progressive plaque psoriasis and their clinical significance.Methods Reverse transcription-polymerase chain reaction(RT-PCR)technique was applied to semi-quantatatively analyze CXCR1and CXCR2mRNA expression in peripheral blood polymorphonuclears(PMNs)from30cases of psoriatic patients,14of the30patients which were treated until the70%of skin lesions resolved,and30healthy controls.The correlation between CXCR1/2and psoriatic area and severity index(PASI)was evaluated.Results CXCR1and CX-CR2mRNA levels in PMNs from psoriatic patients were1.30?1.18和1.62?0.97,respectively,which were markedly higher than those in normal controls(0.56?0.36,0.74?0.58,respectively)and treated patients(0.49?0.34,0.51?0.51,respectively.)(P