Targeting drug delivery system (TDDS) is one of the most concerned research fields in cancer treatment because it can bind selectively and react with the target diseased sites at the cellular or sub-cellular level, making distribution and release of drugs in a controlled manner, thus enhance therapeutic effects and reduce toxic and side-effects on normal cells. Polyamidoamine dendrimer (PAMAMD) is a kind of newly developed polymer in nanometer degree. Hyper-branched, monodispersity, three-dimensional structure and host-guest entrapment ability make it used as drug carrier, gene delivery system and imaging agent. Various targeting ligands, which have high affinity to specific organs, tissues or cells in human body, can be linked to surface functional groups of PAMAMD. And drugs and theoretical gene are carried by encapsulation or chemical conjugation. Finally, PAMAMD targeting drug delivery system can carry drugs and theoretical gene to diseased sites and then release them for targeted therapy. The PAMAMD-based conjugates have small size, ligh permeability and retention effect (EPR), low toxicity and so on. The research progress of PAMAMD modified by different ligands in targeting drug delivery system is reviewed, and research direction of the PAMAMD targeting delivery system in the future is also suggested.

The antitumor activities of artemisinin and its derivatives has become a hot topic in recent years.Artemisinin and its derivatives have been reported to exert antitumor effects mainly by blocking the cell cycle, promoting tumor cell apoptosis, inhibiting angiogenesis and so on.Also, their influence on signaling pathways has attracted considerable interest of many scholars.Currently, in order to discover some compounds with better therapeutic potentials, many studies dedicated to the synthesis and development of new artemisinin derivatives.In addition, the effects of artemisinin and its derivatives on multi-drug resistantace in tumor cells also become a trend of the future research.In this paper, we review the research advances in the antitumor activities of artemisinin and its derivatives during the past five years to provide a reference for future study .

Objective To study the inhibitory effect of Pharbitidis Semen on rat hepatoma induced by N-nitrosodiethylamine ( NDEA) . Methods SD rats were divided into normal control group, model control group and Pharbitidis Semen group. In model control group and Pharbitidis Semen group, 0. 01% NDEA was applied for 90 days to induce hepatoma, and rats in Pharbitidis Semen group concomitantly received feed containing 6% Pharbitidis Semen at the dosage of 40 g·kg-1 ·d-1 . Thirty days after the hepatoma inducement and Pharbitidis Semen administration, the rats were sacrificed to observe the pathological changes in liver, number of hepatoma nodules and liver weight. The changes of liver/body weight, serum alanine aminotransferase (ALT), γ-glutamyl transferase (γ-GT), and alkaline phosphatase (ALP) were compared. One-way ANOVA (LSD Test) was employed for statistical analysis. Results In the normal control group, the number of hepatoma nodules was 0. 0±0. 0, the liver weight was (9. 87±1. 30) g, the ratio of liver/body weight was (2. 62±0. 24)% and the level of serum ALT was (64. 10±12. 71) U·L-1,γ-GT was (0. 80± 0. 42) U·L-1, and ALP was (121. 20±37. 57) U·L-1. In the model control group, the number of hepatoma nodules was (27. 4±9. 5), the liver weight was (21. 38±7. 29) g, the ratio of liver/body weight was (5. 82±2. 31)%, the level of serum ALT was (175. 70±48. 75) U·L-1, γ-GT was (41. 80±15. 38) U·L-1, and ALP was (200. 50±35. 78) U·L-1. In the Pharbitidis Semen group, the number of hepatoma nodules was (8. 6± 5. 3), the liver weight was (13. 91±3. 55) g, the ratio of liver/body weight was (3. 86±0. 76)% and the level of serum ALT was (113.10±45.35) U·L-1, γ-GT was (13. 40± 6. 15) U·L-1, and ALP was (155. 80±30. 26) U·L-1. The results showed that all indices of Pharbitidis Semen group were higher than those of the normal control group, and lower than those of the model control group (P<0. 01 or P<0. 05). Conclusion Pharbitidis Semen can reduce NDEA-induced injury to the liver cells, and inhibit the overgrowth of the hepatoma.

Objective To describe the natural history of cervical intraepithelial neoplasia(CIN)Ⅰand the biologic factors associated with the progression of CINⅠ and to analyze the predictive values of p16INK4a protein for the progression of CINⅠ. Methods From August 2010 to July 2013, 104 patients referred for abnormal cytology [≤ low-grade squamous intraepithelial lesion (LSIL); including negative for intraepithelial lesion or malignancy (NILM), atypical squamous cells of undetermined significance (ASCUS), LSIL] and high-risk (HR) HPV positive,and were diagnosed CINⅠ by colposcopy-assisted biopsy and followed at 1-year intervals in the First Affiliated Hospital of Nanjing Medical University. In order to analyze the relationship between the progression of CINⅠ with clinical biologic factors, including patient age, cervical cytology before colposcopy, loads of HR HPV, HPV L1 capsid protein, p16INK4a protein,χ2 tests was used to compare the different frequencies of factors in groups of progressed and persisted/regressed CINⅠ, then five factors with progressed CINⅠwere processed into binary logistic regression analysis. Results (1) In the first year of follow-up, among 104 patients(including 15 cases NILM,78 cases ASCUS,11 cases LSIL), 52 cases of them were NILM and HR HPV negative, 30 cases were negative for intraepithelial lesion, 10 cases were CINⅠ, 5 cases were CINⅡand 7 cases were CINⅢ. In total, 82 cases (78.8%,82/104) cases had regressed, 10 cases (9.6%,10/104) persisted, 12 cases (11.5%,12/104) progressed [including 5 cases (4.8%,5/104) progressed to CIN Ⅱ, 7 cases (6.7%,7/104) progressed to CIN Ⅲ, none progressed to invasive cancer]. (2) All patients, 88 cases of them accepted immunohistochemical detection the expression of p16INK4a protein. The result shown that 30 cases (34%,30/88) were positive and 58 cases (66%,58/88) were negative. And 94 cases accepted immunocytochemical detection the expression of HPV L1 capsid protein, 49 cases (52%,49/94) were positive and 45 cases (48%,45/94) were negative. (3) Univariate analysis showed that age of the patient, loads of HR HPV, cervical cytology before colposcopy and the expression of HPV L1 capsid protein were not risk factors of the progression of CINⅠ(all P>0.05) except for the expression of p16INK4a protein (P<0.05). Multivariable analysis found that p16INK4a protein positive was associated with progression of CINⅠ(OR=5.1,95%CI:1.162-22.387,P=0.031). (4) Thirty-one cases were p16INK4a protein positive, 8 cases (27%,8/30) of them progressed,while 4 cases (7%,4/58) of 58 cases with p16INK4a protein negative progressed,in which there were significant difference (P<0.05). The sensitivity was 75%, the specificity was 71%, the positive predictive value was 27%and the negative predictive value was 93%for progression to CINⅡ-Ⅲof p16INK4a protein staining. Conclusions The progression rate of CINⅠwith abnormal cytology (≤LSIL) and HR HPV positive was lower, and there was no progression to invasion at 1-year intervals. Immunostaining of p16INK4a protein as the risk factors of CINⅠprogression could have a role in prediction of CINⅠand the management of high-risk CINⅠ.

Objective To study the significance of level changes of serum hydrogen sulfide(H2 S) and interleukin-6(IL-6)in children with hand,foot and mouth disease(HFMD).Methods Nity-two cases with HFMD were enrolled and divided into severe HFMD group(48 cases)and common HFMD group(44 cases).Forty-six healthy children were enrolled as healthy control group.The serum H2 S and IL-6 were detected.Results Acute phase:compared to the healthy control group[H2 S(55.76 ±7.80)μmol /L,IL-6 (61.31 ±13.43)ng /L],the level of serum H2 S significantly reduced and the level of IL-6 significantly increased in severe HFMD group[H2 S(21.72 ±7.52)μmol /L;IL-6(131.33 ±17.82)ng /L]and common HFMD group[H2 S(31.86 ±8.41 )μmol /L;IL-6(95.48 ±15.07)ng /L](P ﹤0.01 ),and there was signifi-cantly difference between the severe HFMD group and common HFMD group(P ﹤0.01 ).Recovery phase:compared to the healthy control group,the serum H2 S level[(34.54 ±13.21 )μmol /L]was lower and IL-6 [(92.73 ±15.25)ng /L]was higher in severe HFMD group(P ﹤0.01 ).The serum H2 S level was negatively correlated with IL-6 in severe HFMD group and common HFMD group(r =-0.31 ,P ﹤0.01 ;r =-0.45, P ﹤0.01 ).Conclusion The serum H2 S and IL-6 participate in the pathological process of HFMD,and the level change can be used as one of indicators of early diagnosis.

ObjectiveTo analyze the potential risk factors for relapse and development of epilepsy in patients with benign in-fantile convulsions associated with mild gastroenteritis (BICE).MethodsA total of 264 cases of BICE were recruited. Accord-ing to the frequency of convulsions, the patients were divided into single group (n=134, convulsion once), and multiple group (n=130, convulsions≥2 times). According to convulsion duration, the patients were divided into short-term group (n=186, con-vulsions duration <5 minutes) , and long-term group (n=78, convulsion duration≥5 minutes). The clinical data obtained during hospitalization and follow-up were analyzed.ResultsIn multiple group, 9.23% were relapsed and 6.15% developed epilepsy. In single group, 2.99% were relapsed and 0.75% developed epilepsy. There were signiifcantly different in the rate of relapses and development of epilepsy between two groups (P<0.05). In the long-term group, 12.82% were relapsed and 8.97% developed epi-lepsy. In the short-term group, 3.23% were relapsed and 1.08% developed epilepsy. There were signiifcantly different in the rate of relapses and development of epilepsy between the two groups (P<0.05).ConclusionsThere are the risks of relapse and development of epilepsy in BICE patients. Convulsions≥ 2 times and≥5 minutes may be the risk factors of relapse and devel-opment of epilepsy.

Objective To investigate effect of peripheral blood miR-21 expression on the clinicopathological features of gastric cancer before and after gastric surgery.Methods The peripheral blood was collected on the operative day and postoperative 7 d in 42 patients with primary gastric cancer surgery.The real-tine quantitative PCR was adopted to detect the relative expression of miR-21 in plasma with U6 as an internal reference gene.Results The plasma miR-21 expression level after gastric cancer operation was significantly down-regulated compared with before operation(P <0.01),the overall relative expression level was dropped by an average of 18.2 times;and it was found that the postoperative miR-21 expression in the patients with the tumor family history was up-regulated,the postoperative plasma miR-21 expression in the patients without the tumor family history was decreased by 22 times compared with before operation(P <0.05);the experimental results also fund that as the patient′s differentiation degree was changed from high to low,the lymph node metastasis rate was gradually increased,while postoperative average miR-21 expression was changed from low to high,showing the relative expression times of miR-21 were distributed in the four differentiated zones of high,middle,middle-low and low,which showed the correlation with the distribution of the lymph node metastasis rate in these four differentiation zones.Conclusion The peripheral blood MiR-21 detection has the clinical significance to early auxiliary diagnosis and the judgement of postoperative malignant degree.

The swollen root of Rehmannia glutinosa is used as one kind of important Chinese traditional medicine. The root of R. glutinosa usually swelled in rotational cropping but not in continuous cropping. The rhizosphere microorganisms of R. glutinosa under different farming condition were thought related to that. In this study, the endophytic fungi in the root of R. glutinosa growing in various soil conditions were isolated for the study of the relationship between the microorganisms and the root enlargement of their host plants. The dominant endophytes, Verticillium spp., Fusarium oxysporum, F. redolens and Ceratobasidium spp. were identified by morphological observation and 18S rDNA and ITS sequence analysis. The preliminary investigation showed that the excessive growth of Verticillium and Fusarium genus fungi is unfavorable for the R. glutinosa root swelling, but Ceratobasidium fungi has no effects on the root enlargement.
DNA, Fungal ; genetics ; DNA, Ribosomal ; genetics ; Fungi ; classification ; genetics ; isolation & purification ; Molecular Sequence Data ; Plant Roots ; microbiology ; Rehmannia ; microbiology

Objective:To construct nursing quality evaluation indicator system for comprehensive stroke center, so as to provide reference for standardized nursing quality evaluation of comprehensive stroke center.Methods:From September 2018 to December 2019, based on the theory of Donabedian′s structure-process-outcome quality model, literature review, semi-structured interview, Delphi method and analytic hierarchy process were used to determine nursing quality evaluation index system and index weight for comprehensive stroke center.Results:A total of 16 experts from comprehensive stroke center were consulted for two rounds. The clinical working time was 24.63±10.08 years, and the effective recovery rates of two rounds were 100%. The authority coefficient of experts was 0.888, and the coordination coefficients W of two rounds were 0.229 and 0.283 respectively.Finally, a nursing quality evaluation indicator system for comprehensive stroke center was constructed, including 3 first-level indicators, 13 second-level indicators and 46 third-level indicators. Conclusions:The established nursing quality evaluation indicator system for comprehensive stroke center covers the whole process of stroke emergency, stroke unit, and follow-up, which is scientific and reliable, and provides an evaluation tool for daily nursing quality monitoring and continuous quality improvement in comprehensive stroke centers.