Humans ; Laryngeal Neoplasms ; surgery ; Larynx ; surgery ; Laser Therapy ; Microsurgery

Humans ; Rhinitis, Allergic, Perennial ; Rhinitis, Allergic, Seasonal

In the process of evolution, pathogenic Streptococcus pyogenes secretes an immunoglobulin G-degrading enzyme IdeS which can specifically cleave the hinge region of immunoglobulin G in order to escape the immune response against the host. On the one hand, IdeS can be used for IgG fingerprinting as a tool enzyme combined with mass spectrometry technology. On the other hand, IdeS can be used to treat the antibody-responsive diseases produced by autoimmunity as a therapeutic protein. In this study, the backbone of plasmid pCold was used to construct two expression vectors of recombinant protein IdeS, which were heterologously expressed in Escherichia coli Shuffle T7. After purification by affinity chromatography, the recombinant IdeS activity was detected and their activity differences between the two were compared. Among them, the yield of the recombinant IdeS containing the His6-tag at the N-terminus was 4 mg·L^-1, and the cleavage reaction with antibody IgG1 at 1∶200 (m/m) at 37 ℃ for 30 min could complete. However, the yield of the recombinant IdeS containing both the N-terminal His6 tag and the C-terminal silica affinity tag (silica bing peptide, SiBP) is 1.5 mg·L^-1, and the degradation reaction with antibody IgG1 at 1∶20 (m/m) at 37 ℃ for 30 min could reach the end. The C-terminal fusion peptide has a great influence on the yield and activity of IdeS, which is not conducive to subsequent application in drug development. Above all, the recombinant IdeS containing the His6-tag at the N-terminus expressed by this system has high activity and can fully meet the needs of antibody drug development and mapping analysis of IgG.

Aged ; Female ; Humans ; Male ; Middle Aged ; Pharyngeal Diseases ; pathology ; Polyps ; pathology

Objective To study the association between clinical symptoms,psychosomatic factors and autonomic nervous function in patients with gastroesophageal reflux disease (GERD).Methods Thirty-four patients with GERD diagnosed by reflux disease questionnaire (RDQ) and endoscopy and 15 healthy control subjects were enrolled in this study.All the subjects were divided into two groups,one with normal scores of Zung's self-rating anxiety scale (SAS) and Zung's depression scale (SDS) as GERD (-) and the other with abnormal scores of SAS and SDS as GERD (+).Reflux symptom score was recorded for both groups at the same time.Autonomic nervous function was assessed by their heart rate variability (HRV) on dynamic electrocardiogram (DCG).The time domain parameters analyzed included standard deviation (SD) of average R-R interval during 24 hours (SDNN),SD of average 5-minute sinus heart rate (SDANN),mean square root of the difference of adjoining two R-R interval (rMSSD),and proportion of the heart beats with difference of R-R interval more than 50 ms from the total heart beats (PNN 50),and the frequency domain parameters analyzed included low-frequency (LF),high-frequency (HF) and ratio of LF to HF.Results Average scores of SAS and SDS were significantly higher in patients with GERD than those in healthy controls (48?9 vs 38?6 and 48?11 vs 41?6,respectively,P

AIM: To analyze the results of phacovitrectomy with internal limiting membrane(ILM) peeling to treat foveoschisis in ultra-high myopia.METHODS: Totally 32 eyes of 32 ultra-high myopia patients with foveoschisis were selected retrospectively.The preoperative refractive errors ranged from-12.00D to-20.00D with the mean of-15.78±2.16D.The best corrected visiual acuity(BCVA) were converted to LogMAR acuity, and the average BCVA was 4.1±0.4.Conventional phacovitrectomy with ILM peeling by ICG dying were performed.Gas tamponade were performed to end the operation.The BCVA and the foveoschisis cavity were observed by 1-9mo after the surgery, with the mean of 4.5mo.RESULTS: The foveoschisis cavity of 30 eyes were healed with BCVA increased and visual distortion alleviated distinctly (94%)(t=-7.91, P<0.05).CONCLUSION: Phacovitrectomy with ILM peeling is useful in treating foveoschisis in ultra-high myopia with visual function preserving.

Objective To investigate the level of follicular fluid NO, VEGF and ET-1 in assessing IVF-ET outcome. Methods Totally 131 patients undergoing IVF-ET cycles were recruited. The level of follicular fluid NO was measured by chromatometry. The follicular fluid VEGF and ET-1 were measured by ELISA. Transvaginal ultrasound was performed on human chorionic gonadotropin (hCG) injection day to determine ovarian volume and antral follicle count. Results The pregnancy rate was 37.40% (49/131). There were significantly increased level of follicular fluid NO, VEGF and decreased level of follicular fluid ET-1 in the pregnant group than those in the non-pregnant group (P<0.05). Total ovarian volume and antral follicle count on HCG injection day were significantly higher in the pregnant group than those in the non-pregnant group (P<0.05). The levels of follicular fluid NO and VEGF had positive correlations with the total ovarian volume and antral follicle count. However, the level of follicular fluid ET-1 had a negative correlation with the total ovarian volume and antral follicle count. Conclusions The high level of NO, VEGF and low level of ET-1 in follicular fluid are good predictors of ovarian blood flow and ovarian response in IVF-ET.

[Abstract] In recent years, scientists have had a deeper understanding of the basic principles of tumor biology and immunology, and immunotherapy for cancer has made great progresses, greatly promoting the development of a series of new immunotherapy drugs for cancer. Cancer immunotherapy aims at eliminating cancer cells by stimulating and coordinating the immune system. However, the promotion and application of cancer immunotherapy are limited because of the uncertain safety and effectiveness of immune regulatory compound delivery. Due to its unique advantages, such as good targeting, less adverse events, and good stability, various nano-targeted delivery systems with different physical and chemical properties have been developed to stimulate the immune system in anti-tumor therapy. In this review, we summed up the research progresses of nanotechnology combined with immunotherapy for cancer in recent years.

Objective To investiagte the serum adiponectin concentration in preeclampsia and its relationship with serum leptin and soluble leptin receptor levels.Method The level of adiponectin,leptin and soluble leptin receptor in serum were measured by enzyme-linked immunosorbent assay(ELISA)in 38 patients with preeclampsia and 42 patients as control.The relationship of free leptin index(leptin/soluble leptin receptor) to preeclampsia was analyzed.Results There were no significant differences in maternal age,gestational age and body mass index(BMI)between two groups.But the gestational age and birth weight were significantly lower in preeclampsia than in control.The patients with preeclampsia had significantly higher levels of serum adiponectin, leptin and free leptin index(1691.7?g/ml,37.5 ng/ml and 0.95 respectively)than the control(689.4?g/ml, 19.3 ag/ml and 0.49,respectively).But there was no significant difference in serum level of soluble leptin receptor between the groups(35.0 ng/ml vs 42.2 ng/ml).Serum adiponectin was not significantly correlated with the level of leptin,soluble leptin receptor and free leptin index.Area of serum adiponectin,leptin and free leptin index in preeclampsia under the ROC curve were less than 0.5.Conclusions The patients with preeclampsia have paradoxical higher serum levels of adiponecfin and more bioavailability of leptin,suggesting these may be important factom of this complication.

Currently, chemotherapy is one of the main therapy for cancer. But the traditional antitumor drugs are systemic distribution in vivo, they are difficult to achieve an effective drug concentration in the tumor tissue and don't have the ability to distinguish normal cells and tumor cells by themselves, that cause systemic toxicity easily and can not meet the clinical needs. With the research on mesoporous silica nanoparticles (MSNs) deepening, more and more attention in the drug delivery system have been payed to in recent years, because of its unique physicochemical structure characteristics, it has the effect on specific targets, directly inhibits the tumor cell growth, reduces the side effects to normal cells, tissues and organs and can be long-term medication, etc. It is expected to be excellent carriers of antitumor drugs. MSNs application in the field of cancer treatment has now become a hot research field of medicine. In this paper, the latest research about MSNs in antitumor drugs targeting delivery system from 2008 to 2015 is summarized, including the application of MSNs separately in antitumor drug targeting, passive targeting, active targeting, physical or chemical conditions response targeting and other compound targeting drug delivery system. We expect it to provide a reference to the toxicity reducing and efficacy enhancing and further development of chemical medicine, natural medicine and monomeric compound of chinese herbal medicine.
Animals ; Antineoplastic Agents ; chemistry ; pharmacology ; Drug Delivery Systems ; methods ; trends ; Humans ; Nanoparticles ; chemistry ; Neoplasms ; drug therapy ; Silicon Dioxide ; chemistry