OBJECTIVETo study the effects of graphene quantum dots (GQDs) on hematopoietic system in rats.

METHODSThirty male SD rats were randomly divided into three groups (n = 10): control group, high dose group (10 mg/kg · d), low dose group (5 mg/kg · d), The rats in experimental group were intravenous injected with GQDs for 28 days and those in control group were injected with normal saline at the same volume. Routine blood and the function of liver and kidney were detected by instrument analysis. The cycle and apoptosis of bone marrow mononuclear cells (BMCs) were detected by FCM. The other three only healthy male SD rat bone marrow mononuclear cells (BMCs) were cultured by joining GQDs for 24 h, 48 h,72 h in vitro, the proliferation was assayed by CCK-8, the content of granulocyte macrophage colony stimulating factor (GM-CSF) from cultural supernatants were detected by ELISA.

RESULTSThe amount of red blood cell and concentration of hemoglobin from experimental group were increased significantly compared with those of control groups (P < 0.05), the concentration of triglyceride and high density lipoprotein were decreased. DNA synthesis period was prolonged (P < 0.01), there was no significant difference in apoptosis. BMCs were promoted proliferation clearly after using GQDs for 72 h (P < 0.05). The content of GM-CSF was increased (P < 0.01) .

CONCLUSIONGQDs may promote hematopoietic function in rats.

Animals ; Apoptosis ; Bone Marrow Cells ; drug effects ; Granulocyte-Macrophage Colony-Stimulating Factor ; metabolism ; Graphite ; pharmacology ; Hematopoiesis ; drug effects ; Male ; Quantum Dots ; chemistry ; Rats ; Rats, Sprague-Dawley

Congenital Abnormalities ; diagnosis ; Diagnostic Imaging ; Ear, Inner ; abnormalities ; Humans

Epidemiologic Methods ; Models, Statistical

Objective To study the effect of Src tyrosine kinase inhibition on subcutaneously transplanted tumor of human lung adenocarcinoma in mice and its mechanism. Methods For the subcutaneously transplanted tumor model, A549 cells or PC-9 cells were inoculated into SCID mice by subcutaneous injection. Immunohistochemistry was used to show the effect of Src tyrosine kinase inhibition on proliferation index (Ki-67 staining) and microvessel density (CD31 staining) of subcutaneously transplanted tumor of human lung adenocarcinoma in mice. Results Subcutaneously transplanted tumor of PC-9 cells was sensitive to src tyrosine kinase inhibitor. There was significant difference between treatment group and control group (P <0.01). There was significant difference between the two treatment group too (P <0.01). Stopping treatment for 1 week, the inhibition rate of tumor growth were 33.19 % and 84.79 % in 10 mg·kg-1·d-1 and 50 mg·kg-1·d-1 treatment group, respectively. The same treatment was less effective to subcutaneous tumors produced by A549 cells. Treatment with 50 mg·kg-1·d-1 Src tyrosine kinase inhibitor significantly reduced the proliferation index of subcutaneously transplanted tumor produced by PC-9 cells (P<0.01) and tended to reduce the proliferation index of subcutaneously transplanted tumor produced by A549 cells (P >0.05). Treatment with 50 mg·kg-1·d-1 Src tyrosine kinase inhibitor significantly reduced micro vascular density in both PC-9 and A549 induced subcutaneous tumors (P <0.05). Conclusion Inhibition of Src tyrosine kinase could suppress the progression of subcutaneously transplanted tumor, not only by the inhibition of cell proliferation of lung adenocarcinoma cells directly, but also by the inhibition of angiogenesis indirectly.

Objective To summarize the experience and the insufficiency of Nanjing Drum Tower Hospital on patent management,and find out the problemsand countermeasures for the management.Methods The authorized patents during 2003-2014 of Nanjing Drum Tower Hospital were analyzed statistically,and the date was overall analyzed combined withthe number,type,content,maintenance and transfer of patent and inventors' educational background,title and subject;and results are further analyzed;Results Patent grant increased significantly more than the invention patent in recent years.In terms of patent types,most patents are utility model patents,and conversion rate of patent outcome is very low.Conclusions Suggestions are proposed to improve hospital patent management:strengthening the guidance of the management of patent policy;promoting patent work;enhancing the professional quality of patent managers;optimizing the patent management processe andstrengthening the patent examination and data analysis;strengthening strategic cooperation among intellectual property management department,patent agency and biological pharmaceutical enterprises.

AIM:To observe the efficacy of intravitreal conbercept injection for chronic central serous chorioretinopathy (CSC).METHODS: Nine eyes of 9 patients diagnosed as chronic CSC between October 2015 to May 2016 were treated with an intravitreal injection of conbercept (0.5mg/0.05mL) (six patients were given the same does of intravitreal injection again at 1mo after the first injection).Follow-up observation was at 1, 2, and 6mo after injection.Observed indicators included best-corrected visual acuity (BCVA), intraocular pressure, optical coherence tomography (OCT), fundus fluorescein angiography (FFA), choroidal indocyanine green angiography (ICGA), macular fovea thickness (CMT), subfoveal choroidal thickness (SFCT).RESULTS:Seven of the 9 patients responded significantly to the drug, while 2 patients had no response.The CMT was 373.12±72.43μm at baseline, which decreased significantly to 332.05±67.13μm, 282.24±62.30μm and 225.56±71.08μm at 1, 2 and 6mo after the intravitreal injection.The mean thickness of SFCT was 422.11±64.82μm before treatment.The choroidal thickness of non-responsive patients before treatment was below average, respectively 353μm and 365μm.The SFCT of 1, 2, and 6mo after treatment was 391.45±75.24μm, 365.53±63.07μm, 355.40±66.65μm.Before treatment and 1mo after, there was no significant difference (P=0.074), but there was statistically significant (P<0.01) between those of before and 2mo and 6mo after.The mean BCVA of the prior treatment was 0.53±0.32, the after treatment was 0.65±0.20, there was no different between the two(P>0.05).CONCLUSION: Intravitreal conbercept injection in chronic CSC may have some effect in accelerating subertinal fluid resolution and decreasing the CMT.The SFCT within 6mo after treatment was significantly lower than pretreatment.The SFCT may be an indicator of whether patients respond.

OBJECTIVETo investigate the contents changes of potential biomarkers of patients infected with influenza A (H1N1) virus of different Chinese medicine (CM) syndrome types.

METHODSEighty-two patients with influenza A (H1N1) virus were differentiated as three syndrome types, i. e., wind-heat invading weifen syndrome (51 cases), heat-toxicity attacking Fei syndrome (22 cases), and superficies tightened by wind cold syndrome (9 cases) according to Chinese medicine syndrome typing. According to patients' willingness and clinical conditions, they were treated by three therapeutic schedules, i. e., herbal therapy, symptomatic treatment, and antiviral therapy. The changes of potential biomarkers contents were detected in the serum of patients of various syndrome types before and after treatment. Results There was no statistical difference in the potential biomarkers contents correlated to symptoms of fever, inflammation and cough, such as PGG2, 20-COOH-LTB4, homocystein, and so on in the serum of patients of various syndrome types before treatment (P > 0.05). There was statistical difference in the potential biomarkers such as 20-OH-LTE4, LTA4, and linolenic acid, etc. between superficies tightened by wind cold syndrome and wind-heat invading weifen syndrome (P < 0.05, P < 0.01). There was statistical difference in the potential biomarkers such as PGF1alpha, prostanoic acid, and etc. between superficies tightened by wind cold syndrome and heat-toxicity attacking Fei syndrome (P < 0.05, P < 0.01). Statistical difference existed in other indices other than dUTP; 5,10-methylene-THF and PGF1alpha in wind-heat invading weifen syndrome and superficies tightened by wind cold syndrome; prostanoic acid, homocysteine, and glucose in superficies tightened by wind cold syndrome when compared with before treatment in the same group (P < 0.05, P < 0.01). The changing tendency of potential biomarkers among different syndrome types was identical. Of them, the change of 6-keto-PGF1alpha content was the most obviously of all indices.

CONCLUSIONThere was difference in the contents of potential biomarkers of patients infected with influenza A (H1N1) virus of different syndrome types, and our study provided experimental data support for the objectiveness of CM syndrome differentiation from the perspective of metabolic substances.

Adolescent ; Adult ; Biomarkers ; blood ; Female ; Humans ; Influenza A Virus, H1N1 Subtype ; Influenza, Human ; blood ; diagnosis ; virology ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Young Adult

An analytical method was developed for the simultaneous extraction and determination of eighteen fluoroquinolones (FQs), tetracyclines (TCs) and sulfonamides (SAs) antibiotics from soils using solid phaseextraction and liquid chromatography tandem mass spectrometry.Soil sample was firstly extracted by phosphate buffer at pH 3 in combination with 50% of organic modifier acetonitrile, then purified and concentrated by SAX and HLB column.Qualitative and quantitative analysis were carried out for the analyte under the MRM mode after the chromatography separation on Kromasil C_(18)(250 mm x4.6 mm, 5 μm) column.The range of recoveries (in percent) for FQs, TCs, SAs, in the soil matrix was 67.20%-88.98%, 62.23%-85.36%, 55.76%-97.37% with 1.1%-17.2% of relative standard deviation respectively in two different concentra tions.The limits of quantification (LOQ, S/N = 3) were 3.36-8.88 jig/kg, 0.56-0.91 μg/kg and 0.07-1.85 μg/kg for FQs, TCs and SAs, respectively.This method was successfully used to detect 18 anti biotics in 6 soil samples with different land types in Tianjin.Results showed some of the antibiotics in the arable soil were detected, with concentrations of 1.72-119.57 μg/kg.

Objective To investigate the effects of Saussurea involucrata extract pretreatment on the expression of the Toll-like receptor 4 (TLR4)/nuclear factor-κB (NF-κB) in focal cerebral ischemia/reperfusion in mice and its possible neuroprotective mechanism.Methods Seventy-two Kunming mice were randomly divided into four groups:sham operation,saline,Saussurea involucrata extract,and edaravone groups (n =18 in each group).Saussurea involucrata extract 0.8 g/kg was given intraperitoneally in the Saussurea involucrata extract group; edaravone 3 mg/kg was given in the edaravone group; and the same volume of saline was given in the saline group.A model of middle cerebral artery occlusion (MCAO) was induced after 7 days of continuous injection.Cerebral infarct volume was determined by 2,3,5-triphenyltetrazolium staining.Immunohistochemical staining was used to detect TLR4-positive cells in ischemic brain tissue.Reverse transcriptase polymerase chain reaction was used to detect the expression of TLR4/NF-κB mRNA.Results The cerebral infarct volume in mice in the saline,Saussurea involucrata extract and edaravone groups was 131.55± 28.25 mm3,84.10 ±13.92 mm3 and 65.10 ± 6.78 mm3,respectively.There were significant difference (F =10.158,P =0.012).The infarct volume in the Saussurea involucrata extract group (P =0.020) and edaravone group (P0.005) was significantly less than that in the saline group,and there was no significantly difference between the 2 groups.The numbers of cortex and TLR4 positive cells in hippocampus area at the ischemic sides in the saline group were significantly more than those in the sham operation group (all P ＜0.001).The numbers of positive cells of cortex and TLR4 in the Saussurea involucrata extract group and the edaravone group were significantly decreased compared to the saline group (all P ＜ 0.05),and there was no significant differences between the Saussurea involucrata extract group and the edaravone group.The expressions of TLR4,p50,and p65 mRNA in the saline group were significantly up-regulated compared to the sham operation group (all P =0.000).Saussurea involucrata extract could significantly down-regulate the expressions of TLR4,p50,and p65 mRNA at 24 hours after ischemia/reperfusion (all P =0.000).Edaravone could significantly down-regulate the expressions of TLR4 and p65 mRNA (all P =0.000) and it had a down-regulated trend for the expression of p50 mRNA (P =0.053); while there was no significant difference in the expressions of TLR4 and p65 mRNA between the Saussurea involucrata extract group and the edaravone group.Conclusions Saussurea involucrata extract pretreatment may significantly reduce the cerebral infarct volume,down-regulate the expressions of TLR4 and NF-κB subunit,and play a neuroprotective effect by inhibiting inflammatory response after ischemia.

Objective To investigate immunophenotypic characteristics of uterine natural killer (uNK)cells and helper T cell 1/helper T cell 2(Th1/Th2)immunity in third trimester decidua in preeclampsia.Methods The proportions of uNK cell subsets,expression of CD_(69)and CD_(94)on uNK cells and Th1/Th2 immunity in decidua were determined in 20 cases of preeclampsia patients and 11 cases of normal term pregnancies by flow cytometric analysis.Results The percentage of CD_(56)~(bright)CD_(16)~-uNK cell subset in preeclampsia patients and the controls was(17.3?11.1)% vs(17.9?16.8)%,that of CD_(56)~(dim) CD_(16)~+uNK cell subset was(16.3?8.7)% vs(16.2?8.8)%;that of CD_(56)~+CD_(69)~+uNK cells was(37.9 ?18.9)% vs(36.8?19.7)%,that of CD_(56)~+CD_(94)~+uNK cells was(34.9?15.2)% vs(32.7?16.2)% and the ratio of CD_(56)~+CD_(69)~+/CD_(56)~+CD_(94)~+was 1.1?0.2,1.2?0.6.No statistical difference was shown in the above values between the preeclampsia patients and controls.The percentage of cytoto xic T cell(Tc)2 cells was significantly lower in the decidua of preeclampsia patients [(3.0?1.0)% vs(4.3?0.9)%,P= 0.001 ],and the ratio of Tc1/Tc2 in preeclampsia patients was significantly higher than that of normal term pregnancies(17.8?3.4 vs 11.8?4.6;P=0.001);the ratio of Th1/Th2 was increased(15.1?2.4 vs 13.2?3.1;P=0.06).Conclusions The immunophenotypie characteristics of uNK cells do not present any significant change in preeclampsia patients.Owing to Tc2 cell decrease,the Th1/Th2 immunity shifts to Th1 type immunity in the decidua,which might contribute to the pathogenesis of preeclampsia.