Objective To investigate the effect of plateau hypoxia on the blood-brain barrier after subarachnoid hemorrhage (SAH) in rats. Methods Adult male SD rats (n = 78) were randomly divided into 4 groups: sham group (sham), SAH model group (SAH), plateau hypoxia sham group (Hp sham) and plateau hypoxia SAH model group (Hp SAH). The rat model of plateau hypoxia was established through low-pressure simulation chamber (altitude 5000 m), and the SAH model was established by endovascular perforation method. At 24 hours after SAH, neurobehavior score and SAH grade were assessed. The morphological changes of neurons and apoptosis of nerve cells in the CA1 region of hippocampal were observed by the staining of Nissl and TUNEL. The expression of phosphorylated PI3K (p-PI3K), PI3K, phosphorylated Akt (p-Akt), Akt, phosphorylated nuclear factor κB (p-NF-κB), NF-κB, matrix metalloproteinase-9 (MMP-9), occludin and claudin-5 in hippocampal were detected by the method of Western blotting. The expression of occludin and claudin-5 proteins in the CA1 region of hippocampal were observed by immunofluorescent staining. Results At 24 hours after SAH, the neurobehavior score decreased significantly and SAH grade increased significantly in the SAH and Hp SAH group (P< 0.05). Neurobehavior score decreased significantly in the Hp SAH group compared with the SAH group (P < 0.05). In the SAH group, neurons in the CA1 region of hippocampus were atrophied and deformed, the arrangement were disordered, the number of neurons decreased significantly, and the apoptosis of nerve cells increased significantly(P< 0.05). Plateau hypoxia could aggravate the morphological damage of neurons and apoptosis of nerve cells. The expression of p-PI3K/PI3K, p-Akt/Akt, occludin and claudin-5 proteins decreased significantly, while the expression of p-NF-κB/NF-κB and MMP-9 proteins increased significantly in the SAH and Hp SAH group (P< 0.05). The expression of p-PI3K/PI3K and MMP-9 proteins increased significantly in Hp SAH group compared with the SAH group. The expression of claudin-5 protein increased significantly in Hp sham group compared with the sham group (P < 0.05). Immunofluorescent staining showed that the expression of occludin and claudin-5 proteins in the CA1 region of hippocampus decreased in the SAH group. Plateau hypoxia could further decreased the expression of occludin and claudin-5 proteins. Conclusion Plateau hypoxia aggravates blood-brain barrier disruption after subarachnoid hemorrhage in rats through inhibiting PI3K/Akt/NF-κB pathway.

Objective: Autologous peripheral blood stem cells (PBSC) derived from bone marrow can promote liver regeneration and improve the liver function of patients, but there are few studies on its effect on the long-term outcomes in patients with decompensated cirrhosis. Based on previous work, this study observed the clinical outcomes of PBSC treatment in patients with decompensated cirrhosis for 10 years, in order to provide more data support for the safety and efficacy of stem cells in clinical applications. Methods: Data of patients with decompensated liver cirrhosis who completed PBSC treatment in the Department of Gastroenterology of the First Affiliated Hospital of Air Force Military Medical University from August 2005 to February 2012 were included. The follow-up endpoint was death or liver transplantation, and patients who did not reach the follow-up endpoint were followed-up for at least 10 years. The patients with decompensated liver cirrhosis who met the conditions for PBSC treatment but did not receive PBSC treatment in our hospital during the same period were used as controls. Results: A total of 287 cases with decompensated liver cirrhosis had completed PBSC treatment, and 90 cases were lost to follow-up within 10 years after surgery. A total of 151 cases with complete survival follow-up data were included in the control group. There were no statistically significant differences in baseline information such as gender, age, etiological composition and liver function score between the two groups. The 10-year survival rate was higher in PBSC than control group (37.56% vs. 26.49%, P<0.05). Cholinesterase, albumin, international normalized ratio, Child-Turcotte-Pugh score, model for end-stage liver disease score, and other indicators were gradually recovered within 3 months to 1 year after PBSC treatment, and stabilized at a more desirable level in the long-term after follow-up for up to 10 years. There was no statistically significant difference in the incidence of liver cancer between the two groups (25.22% vs.31.85%, P=0.267). The age of onset of hepatocellular carcinoma was later in PBSC than control group [(56.66±7.21) years vs. (52.69±8.42) years, P<0.05]. Conclusions: This long-term observational follow-up study of more than ten years confirms that PBSC treatment can bring long-term benefits to patients with decompensated cirrhosis, with good long-term safety, thus providing more data support on the safety and efficacy of stem cells for clinical applications.
End Stage Liver Disease ; Follow-Up Studies ; Humans ; Liver Cirrhosis/drug therapy* ; Middle Aged ; Peripheral Blood Stem Cells ; Severity of Illness Index ; Treatment Outcome

An ideal animal model of azoospermia would be a powerful tool for the evaluation of spermatogonial stem cell (SSC) transplantation. Busulfan has been commonly used to develop such a model, but 30%-87% of mice die when administered an intraperitoneal injection of 40 mg kg^-1. In the present study, hematoxylin and eosin staining, Western blot, immunofluorescence, and quantitative real-time polymerase chain reaction were used to test the effects of busulfan exposure in a mouse model that received two intraperitoneal injections of busulfan at a 3-h interval at different doses (20, 30, and 40 mg kg^-1) on day 36 or a dose of 40 mg kg^-1 at different time points (0, 9, 18, 27, 36, and 63 days). The survival rate of the mice was 100%. When the mice were treated with 40 mg kg^-1 busulfan, dramatic SSC depletion occurred 18 days later and all of the germ cells were cleared by day 36. In addition, the gene expressions of glial cell line-derived neurotrophic factor (GDNF), fibroblast growth factor 2 (FGF2), chemokine (C-X-C Motif) ligand 12 (CXCL12), and colony-stimulating factor 1 (CSF1) were moderately increased by day 36. A 63-day, long-term observation showed the rare restoration of endogenous germ cells in the testes, suggesting that the potential period for SSC transplantation was between day 36 and day 63. Our results demonstrate that the administration of two intraperitoneal injections of busulfan (40 mg kg^-1 in total) at a 3-h interval to mice provided a nonlethal and efficient method for recipient preparation in SSC transplantation and could improve treatments for infertility and the understanding of chemotherapy-induced gonadotoxicity.
Adult Germline Stem Cells/transplantation* ; Animals ; Azoospermia/chemically induced* ; Busulfan/toxicity* ; Disease Models, Animal ; Infertility, Male/chemically induced* ; Injections, Intraperitoneal ; Male ; Mice ; Spermatogenesis/drug effects* ; Spermatogonia/drug effects* ; Stem Cell Transplantation/methods*

BACKGROUND: The posterior anatomical locking plate has obtained excellent fixing performance in the treatment of complex fractures of the distal tibia; however, there are many drawbacks such as nail and plate broken, and the related rules are never reported. OBJECTIVE: To establish a finite element model of posterior anatomical locking plate for distal tibia and to provide references for its design and improvement. METHODS: The imaging data of a male patient aged 34 years old (body mass: 68 kg) with fracture on the left distal tibia were imported into Mimics16.01 software, and the proposed reconstruction parts were determined based on the default threshold of the software. The files were imported into the Ansys11.0 software, the distal tibial surface was fixed, and a force of 340 N was vertically loaded on the supine surface of the horizontal section of the large tibial shaft. RESULTS AND CONCLUSION: There was completely connected with the stepped surface of nut and screw thread portion in locking steel plate. The strain on the plate depended on the stress values. The posterior anatomical locking plate for distal tibia was more favorable for the fixation at the fracture site and could reduce the fixed plate and screws loosening, both of which could affect the fixed efficacy.

Objective To explore the method of reducing the phenomenon of wet bag in the no-woven packing after sterilization in the central sterile supply .Methods The phenomenon of wet bag in the no-woven operation packing after sterilization was due to the bad absorption of water molecules in the non -woven packaging, movement the non-woven packaging without the given time and poor temperature and humidity in the storage.The improvements were carried out according to the above problems , and the effective method of reducing the phenomenon of wet bagwas summarized .The no-woven packing in the experimental group was packed by no-woven, and filled up a piece of the crepe paper between the instruments and the non-woven and laid the single deck cotton cloth over the sterilization frame in the packaging process .Results The incidence rate of wet bag was decreased from 7.64%to 1.04%three months after improvement.Conclusions Filling up a piece of the crepe paper between the instruments and the non-woven and laying the single deck cotton cloth over the sterilization frame in the packaging process can effectivelyprevent the phenomenon of wet bag in the no -woven operation packing after sterilization .

OBJECTIVEThe present study was designed to explore the cited status and its correlated factors of articles published in Chinese Journal of Pediatrics.

METHODArticles published in Chinese Journal of Pediatrics from 2001 to 2010 were searched using Wanfang Medical Online database, and the relationship between cited number and column and funding status were analyzed.

RESULTSTotally 3209 articles were published by Chinese Journal of Pediatrics from 2001 to 2010. Two thousand and seventy-three articles (64.60%) were cited. The total cited number was 18 546 (mean rate: 5.78 per paper). Standard/protocol/guideline was the most often cited column (mean rate: 62.92 per paper). Featured articles including editorials (mean rate: 7.12 per paper), special articles (mean rate: 6.50 per paper) and original articles (mean rate: 7.90 per paper) had higher cited rate. Cited rate of original papers in featured articles was higher than other original articles (mean rate: 6.03 per paper). Those with academic perspectives, such as Opinion/Debate/Discussion, were well cited (mean rate: 7.09 per paper). All of original articles in Rapid Pathway were well cited (mean rate: 16.20 per paper). Mean cited number of grant-supported articles was 4.81 per paper, lower than that of all kinds of papers (mean rate: 5.78 per paper) and non-grant-supported articles (mean rate: 6.06 per paper). However, it was slightly higher than that of articles except Standard/protocol/guideline (mean rate: 4.36 per paper).

CONCLUSIONCited status varies among columns. The invited papers should be increased in number to raise commentary papers and original articles with high quality.Grant-supported or non-grant-supported papers should be reviewed based on the same standard after submission.

Bibliometrics ; Pediatrics ; Periodicals as Topic ; statistics & numerical data

Adenine ; analogs & derivatives ; therapeutic use ; Adult ; Bone Density ; drug effects ; Creatinine ; blood ; Hepatitis B, Chronic ; complications ; drug therapy ; metabolism ; Humans ; Male ; Organophosphonates ; therapeutic use ; Pain ; etiology ; Phosphorus ; blood

OBJECTIVEThis study was designed to investigate the influence of journals indexed by Science Citation Index (SCI) on Chinese medical journals.

METHODArticles on medicine written by Chinese and the journals that published these articles from 2000 to 2009 were searched using Science Citation Index Expanded (SCI-E) database, and the status and variation tendency of the impact factors (IF) of these journals were analyzed. Data of articles on medicine included Chinese Scientific and Technical Paper and Citations Data (CSTPCD) from 2000 to 2008 were searched (the data of 2009 have not been released). The included articles and the time-dependent changing profile were studied. These outcomes were evaluated as the fixed base relative or link relative when compared with the data of 2000 or those of last year, respectively. Geometric mean was used when mean increase was calculated and IF distribution was described with median.

RESULTTotally 3774 articles from China were published by journals indexed by SCI-E in 2000, and the number of articles published by Chinese authors increased every year. In 2008, 16 714 articles were indexed by SCI-E, 442.87% higher than those of 2000. The increment was 161.54% higher than that of articles published in the journals indexed by CSTPCD (281.33%) during the same period. From 2000 to 2009, the geometric mean of increase in the number of published articles from China in journals indexed by SCI-E was 20.87% but it was 18.21% in CSTPCD. From 2000 to 2009, the median of IF of SCI-E indexed journals that published Chinese medical articles was 1.866, 2.073, 2.390, 2.702, 2.409, 2.496, 2.380, 2.218, 2.280 and 2.331, respectively, and they did not increase or even decreased.

CONCLUSIONThe number of the articles indexed by SCI-E increased year by year, much faster than that of CSTPCD. However, it does not necessarily mean the increase in impact.

Bibliometrics ; China ; Journalism, Medical ; Periodicals as Topic ; statistics & numerical data

OBJECTIVETo compare the contents of iridoid in the different processed products from Gardenia jasminoides.

METHODContents of geniposide and genipin gentiobioside in products were determined simultaneously by HPLC. A kromasil C18 column at 35 degrees C was used with the acetonitrile-0.3% formic acid anhydrous (12:88) as the mobile phrase. The detection wavelength was set at 238 nm and the flow rate was 1.0 mL x min(-1).

RESULTThe obtained linearity of the two components was good with that the relative coefficients (r) were over 0.9994 and the average recoveries were 101.8%, 99.1%, respectively.

CONCLUSIONThe method is simple, accurate with good reproducibility. The results showed contents of two components are difference in the different processed products.

Chromatography, High Pressure Liquid ; Drugs, Chinese Herbal ; chemistry ; Gardenia ; chemistry ; Iridoids ; chemistry

OBJECTIVETo establish a quick method to detect drug resistance of Mycoplasma pneumoniae (MP) and study the condition of drug resistance in MP infection.

METHODSMP 23S rRNA target gene in throat swab specimens from 200 patients with suspected MP infection was detected by using nested PCR and DNA sequencing. The result of 23S rRNA gene detection was confirmed by MP isolation and drug susceptibility test in vitro for reliability.

RESULTSOf the 200 clinical specimens, 64 were proved to be positive for MP through MP-IgM antibody, MP specific 16S rRNA nested PCR and MP isolation . The 23S rRNA gene was amplified and the gene sequence was compared with MP reference strain in Genbank, 26 were identical to the reference strain, 38 had a point mutation in 23S rRNA. Among them, 35 had A to G mutation at position 2063, 1 had A to C mutation at position 2063 and 2 had A to G mutation at position 2064, the percentage of drug resistance was 59.4%. The sensitivity of the gene detection method was 10(2) ccu/ml and it was confirmed to be reliable by MP isolation and drug susceptibility test.

CONCLUSIONSThe gene detection method could detect MP drug resistant gene directly from clinical specimen, which has the advantages of high specificity, high sensitivity and quickness. It is of great significance for diagnosis of MP infection because MP isolation is difficult and time-consuming.

Adolescent ; Child ; Child, Preschool ; Drug Resistance, Bacterial ; Female ; Genes, rRNA ; Humans ; Infant ; Male ; Microbial Sensitivity Tests ; Mycoplasma pneumoniae ; genetics ; isolation & purification ; Point Mutation ; Polymerase Chain Reaction ; RNA, Bacterial ; genetics ; RNA, Ribosomal, 23S ; genetics