Silk fibroin is a natural polymer with certain water solubility, structural modification, good biocompatibility and biodegradability, which can be used as a drug delivery carrier material. As a promising drug delivery system, drug-loaded silk fibroin nanoparticles can control drug release, reduce toxicity and improve therapeutic effects. In this paper, the basic characteristics of silk fibroin, the preparation methods of drug-loaded silk fibroin nanoparticles and the application of silk fibroin in nanoparticulate drug delivery systems are reviewed, and on this basis, the further development of drug-loaded silk fibroin nanoparticles is prospected.

OBJECTIVETo observe osteoclasts on the resorbing surface of human deciduous teeth.

METHODSAfter fixing the collected deciduous teeth, we prepared the tooth slices without decalcification, treated them with HE and TRAP dyestuff, and observed the osteoclasts under light and scanning electron microscope.

RESULTSThere were large quantity of various forms of overlapping and huge osteoclasts with many nuclei and silk-like protuberances on the resorbing surface of deciduous teeth. The multinucleated osteoclasts align on the surface of coarse dentin.

CONCLUSIONOn the resorbing surface of human deciduous teeth there are large amount of osteoclasts which can be used as a source of studying human osteoclast.

Humans ; In Vitro Techniques ; Osteoclasts ; cytology ; Tooth Resorption ; Tooth Root ; cytology ; Tooth, Deciduous ; cytology

Adult ; Cell Adhesion Molecules ; genetics ; Genetic Predisposition to Disease ; Genotype ; HIV Infections ; etiology ; genetics ; Humans ; Lectins, C-Type ; genetics ; Middle Aged ; Receptors, Cell Surface ; genetics

Objective To analyze the diagnostic value of apolipoprotein E and lipid levels in patients for early diagnosis of cerebral infarction.Methods A total of 80 patients with cerebral infarction were enrolled in this study as the study group from June 2015 to October 2016.Meanwhile,80 healthy subjects were selected as the control group.The serum apolipoprotein E and blood lipid were compared between the two groups.Results The difference of apolipoprotein E levels between the two groups was statistically significant (P ＜ 0.05).Apolipoprotein E combined with serum total cholesterol and low density lipoprotein cholesterol for the diagnosis of cerebral infarction had a sensitivity of 37.5 ％,specificity accuracy of 100％,and diagnostic efficiency of 60％.Conclusion Early cerebral infarction patients diagnosed with apolipoprotein E combined with lipid levels had a good clinical value.

0.05).Moreover,the growth curves of the two kinds of cells were similar.Con- clusions The cell growth properties of cultured transplanted rabbit SMG are similar to that of normal SMG,the cytobiological charac- teristic of transplanted autologous free rabbit SMG are not changed evidently.

Objective To observe the effect of home care nursing guidelines based on care protocol nursing theory on hemodialysis(HD)patient compliance of ingesting liquid.Methods Forty-eight HD cases were randomized into Groups A(the observation group,n = 24)and B(the control group,n = 24).The control group was given usual care and health education,and the observation group was additionally cared with home care nursing based on care protocol nursing theory for 1 month and followed up for 3 months.The compliance of ingesting liquid was evaluated and the relation between the family supporting and the IDGW relative magnitude (IDGW)was obversed.Results The IDGW relative magnitude of the observation group was lower than the control group;the compliance of ingesting liquid was more improved in the observation group;the level of family supporting of the observation group was obviously higher than the control group;and it was a negative correlation between the family supporting and the IDGW relative magnitude.Conclusions Home care nursing based on care protocol nursing theory makes patients get family support from their family that got guidelines,increase the compliance of ingesting liquid,and control IDGW during hemedialysis in an ideal range,

Objective To discuss the clinical characteristics and treatments for chondrosarcoma of paranasal sinus and the skull base. Methods The clinical characteristics of chondrosarcoma of paranasal sinus and skull base in 7 patients tmderwent endoscopic surgeries between 2001 and 2008 were analyzed. Of the patients,4 men and 3 women. The patients' age ranged from 18 to 47 years,with a median of 31 years. Clinical symptoms: stuffy, nose bleeding, runny, headache, diplopia, eye outreach limited, blurred vision and even blindness. Surgery methods:under nasal endoscopy,after the attachment sites of the tumors to normal tissues were confirmed,the tumors were peeled off along the clear boundary between the tumors and normal tissues,and the potential residual tumor tissues on bones were cleared by a drill. Results The patients were followed up postoperatively for 24 to 108 months,with a median of 36 months. Five of 7 patients were no recurrence,2 were alive with tumor. Conclusions Chondrosarcoma of paranasal sinus and skull base can be treated by nasal endoscopic surgery, with good clinical outcome.

Objective To study epidemiological features of HIV infection after blood transfusion and the situation of transmission among members of family.Methods The persons infected with HIV through blood transfusion and their intrnfamilial transmission in some city were analyzed and testing methods of ELISA,Western-blot,RT-PCR and subtype analyzing were used.The whole surveillance data came from residents investigation around problem medical centres and HIV monitoring network around Hebei province.Results 173 people infected with HIV after blood transfusion in some city.including 89 cases found in hospital and 84 cases in CDC,accounted for 68.7%(173/252)of all of infected persons by blood transfusion in Hebei province.The rate of intrafamilial transmission,spousal transmission and mother-to-child transmission((MTCT)were 32.0% (49/153),17.0%(26/153)and 32.7%(32/98),respectively.Most of persons infected with HIV were youth among who the female were more than the male.Childbearing and women's ailments were the main cause of blood transfusion from 1990 to 1999,and traumatism surgery took second place.Infected persons by HIV blood,whose time to diagnostic were the year from 1999 to 2009,spread over Kangtai hospital and other hospital which accounted for 45.1%(78/173)and 42.2%(73/173),respectively.The genetype of all patients were B'subtype.Conclusion The medical centers at the grass-roolg level in some city resuhed in outbreak of infected persons bv HIV blood because of having no screening test antibody of HIV fur paid blood donors.

OBJECTIVETo investigate the therapeutic effect of mild hypothermia on severe traumatic brain injury.

METHODSEighty-six in-patients with severe traumatic brain injury treated ordinarily were consecutively randomized into two groups: a hypothermia group (n=43) and a normothermia group (the control group, n=43). In the hypothermia group, the core temperature (i.e., nasopharyngeal or brain temperature) of the patient was reduced to and maintained at 33-35 degrees C with a systemic cooling blanket. Natural rewarming began after 3-5 days (mean: 4.3 days) of hypothermia treatment. In the control group, the patient received no hypothermia treatment. The vital sign, extradural pressure and serum superoxide dismutase were observed and measured during treatment, and the complications as well as the Glasgow outcome scale were evaluated at 2 years after injury.

RESULTSThe mean extradural pressure in the hypothermia group (27.38 mm Hg +/- 4.88 mm Hg at 24 hours, 29.40 mm Hg +/- 4.50 mm Hg at 48 hours and 26.40 mm Hg +/- 4.13 mm Hg at 72 hours after injury) was much lower than that in the control group (32.63 mm Hg +/- 3.00 mm Hg, 34.80 mm Hg +/- 6.00 mm Hg and 31.81 mm Hg +/- 4.50 mm Hg respectively at 24, 48 and 72 hours, P<0.05). The mean serum superoxide dismutase levels in the hypothermia group on days 3 and 7 (583.7 microg/L +/- 99.6 microg/L and 699.4 microg/L +/- 217.3 microg/L, respectively) were much higher than those in the control group at the same time period (446.6 microg/L +/- 79.5 microg/L and 497.1 microg/L +/- 101.2 microg/L, respectively, P<0.01). The recovery rates at 2 years after injury were 65.1% in the hypothermia group and 37.2% in the control group (P<0.05). The mortality rates were 25.6% in the hypothermia group and 51.2% in the control group (P<0.05). The complications, including pulmonary infections, thrombocytopenia (platelet count < 100 x 10(9)/L), hemorrhage in the digestive tract, electrolyte disorders and renal malfunction, were managed without severe sequelae.

CONCLUSIONSMild hypothermia is a safe and effective therapeutic method, which can lower the extradural pressure, increase the serum superoxide dismutase and improve the neurological outcomes without severe complications in the patients with severe traumatic brain injury.

Adult ; Aged ; Analysis of Variance ; Chi-Square Distribution ; Craniocerebral Trauma ; therapy ; Decompression, Surgical ; Female ; Glasgow Coma Scale ; Humans ; Hypothermia, Induced ; Intracranial Pressure ; Male ; Middle Aged ; Therapeutics

OBJECTIVETo analyse the outcome of allogeneic peripheral blood stem cell transplantation (allo-PBSCT) for myelodysplastic syndromes (MDS).

METHODSTwenty-three patients with MDS received G-CSF mobilized HLA-identical sibling allo-PBSCT. The numbers of mononuclear cells (MNC) and CD34+ cells were 8. 25 (4.50 -22.36) x 10(8)/kg and 5.59 (1.57 - 12.22) x 10(6)/kg respectively. CsA and shorten course MTX were used for graft-versus-host disease (GVHD) prophylaxis and MMF was given on + 1 d - +28 d posttransplantation.

RESULTSAmong 23 patients, 22 achieved hematopoietic recovery. The median time of ANC > 1.0 x 10(9)/L and BPC > 50 x 10(9)/L were + 13 (+ 11 - +17) days and + 30 (+13 + 102) days respectively. Two patients died of transplant related complications and three died of disease relapse, while 18 patients survived. Kaplan-Meier analysis showed disease free survival and relapse rate were (77.8 +/- 8.7)% and (14.4 +/- 7.5)% respectively.

CONCLUSIONAllo-PBSCT is an effective treatment for MDS patients.

Adolescent ; Adult ; Antigens, CD34 ; Erythrocyte Transfusion ; Female ; Graft Survival ; Graft vs Host Disease ; prevention & control ; Humans ; Male ; Middle Aged ; Myelodysplastic Syndromes ; surgery ; Peripheral Blood Stem Cell Transplantation ; methods ; Transplantation, Homologous ; Treatment Outcome