Characterization of "Off-Target" Immune Modulation Induced by Live Attenuated Yellow Fever Vaccine

BACKGROUND

Live attenuated vaccines alter immune functions and are associated with beneficial outcomes. We previously demonstrated that live attenuated yellow fever virus (YFV) vaccine (LA-YF-Vax) dampens T-cell receptor (TCR) signaling in vitro via an RNA-based mechanism. We examined study participants before and after LA-YF-Vax to assess TCR-mediated functions in vivo.

METHODS

Serum samples and peripheral blood mononuclear cells (PBMCs) were obtained before and after LA-YF-Vax (with or without additional vaccines) or quadrivalent influenza vaccine. TCR-mediated activation was determined by interleukin 2 release or phosphorylation of the lymphocyte-specific Src kinase. TCR-regulating phosphatase (protein tyrosine phosphatase receptor type E [PTPRE]) expression was also measured.

RESULTS

Compared with prevaccination findings, LA-YF-Vax recipient PBMCs demonstrated transient reduction in interleukin 2 release after TCR stimulation and PTPRE levels, unlike in control participants who received quadrivalent influenza vaccine. YFV was detected in 8 of 14 participants after LA-YF-Vax. After incubation of healthy donor PBMCs in serum-derived extracellular vesicles prepared from LA-YF-Vax recipients, TCR signaling and PTPRE levels were reduced after vaccination, even in participants without detectable YFV RNA.

CONCLUSIONS

LA-YF-Vax reduces TCR functions and PTPRE levels after vaccination. Extracellular vesicles from serum recapitulated this effect in healthy cells. This likely contributes to the reduced immunogenicity for heterologous vaccines after LA-YF-Vax administration. Identification of specific immune mechanisms related to vaccines should contribute to understanding of the "off-target," beneficial effects of live vaccines.

[Analysis of the therapeutic efficacy of pars plana vitrectomy without intraocular tamponade in the treatment of high myopic eyes with myopic foveoschisis and central foveal detachment]

Objective: To investigate the efficacy of pars plana vitrectomy (PPV) without intraocular tamponade in the treatment of high myopic eyes with myopic foveoschisis (MF) accompanied by foveal detachment (FD). Methods: A retrospective case series study was conducted. The medical records of patients diagnosed with unilateral MF accompanied by FD at the Eye & ENT Hospital of Fudan University between May 2018 and December 2021 were collected. All patients underwent 23-gauge PPV with posterior vitreous cortex clearance, and no intraocular tamponade was applied. The cases were divided into groups based on whether the internal limiting membrane was peeled during surgery or retained. Follow-up was conducted for at least 12 months. The main outcome measures included postoperative best-corrected visual acuity (BCVA, converted to logarithm of the minimum angle of resolution), central foveal thickness (CFT), MF resolution, and complications. Statistical analyses were performed using t-tests, chi-square tests, Fisher's exact tests, and univariate and multivariate linear regression. Results: A total of 40 patients (40 eyes) with MF and FD were included in the study, with 30.0% being male and 70.0% female. The mean age was (56.9±11.7) years, and the axial length of the eyes was (29.1±1.9) mm. At 12 months postoperatively, BCVA improved from baseline 1.15±0.58 to 0.73±0.39 (t=6.11, P<0.001), and CFT decreased from baseline (610.1±207.2) μm to (155.9±104.1) μm (t=13.47, P<0.001). Complete resolution of MF with foveal reattachment was observed in 80.0% of eyes, with a median time of 6 (5, 8) months. There was no significant difference in BCVA and CFT between the internal limiting membrane peeled group and retained group [0.68±0.39 vs. 0.79±0.40, t=0.85, P=0.403; (148.3±63.8)vs.(164.3±137.2)um,t=0.48, P=0.634]. One eye experienced macular hole and another eye developed retinal detachment postoperatively. Correlation analysis showed a positive correlation between BCVA at 12 months postoperatively and baseline BCVA (β=0.433, P<0.001). Conclusions: Pars plana vitrectomy without intraocular tamponade is effective in treating MF accompanied by FD. The choice between internal limiting membrane peeling and retention does not significantly affect visual prognosis.

New evidence for the Ontong Java Nui hypothesis

The formation of the Ontong Java Nui super oceanic plateau (OJN), which is based on the model that the submarine Ontong Java Plateau (OJP), Manihiki Plateau (MP), and Hikurangi Plateau (HP) were once its contiguous fragments, could have been the largest globally consequential volcanic event in Earth's history. This OJN hypothesis has been debated given the paucity of evidence, for example, the differences in crustal thickness, the compositional gap between MP and OJP basalts and the apparent older age of both plateaus relative to HP remain unresolved. Here we investigate the geochemical and ⁴⁰Ar-³⁹Ar ages of dredged rocks recovered from the OJP's eastern margin. Volcanic rocks having compositions that match the low-Ti MP basalts are reported for the first time on the OJP and new ~ 96-116 Ma and 67-68 Ma ⁴⁰Ar-³⁹Ar age data bridge the temporal gap between OJP and HP. These results provide new evidence for the Ontong Java Nui hypothesis and a framework for an integrated tectonomagmatic evolution of the OJP, MP, and HP. The isotopic data imply four mantle components in the source of OJN that are also expressed in present-day Pacific hotspots sources, indicating origin from (and longevity of) the Pacific Large Low Shear-wave Velocity Province.

[Impact of neoadjuvant immunotherapy on pulmonary function and perioperative outcomes in patients with resectable non-small cell lung cancer]

Objective: To explore the effect of neoadjuvant immunotherapy on pulmonary function and the efficacy in patients with resectable non-small cell lung cancer. Methods: Data of 30 patients with non-small cell lung cancer (NSCLC) who received neoadjuvant immunotherapy before surgery in the Chest Hospital of Shanghai Jiaotong University from March 2018 to September 2021 were retrospectively collect. The efficacy and safety of neoadjuvant immunotherapy in the perioperative period and changes in pulmonary function of patients before and after neoadjuvant treatment were valuated. Results: The patients were all-male with age of (61±8)years old, The major pathological response (MPR) rate of patients receiving neoadjuvant immunotherapy was 43%(13 cases), the pathologic complete response (pCR) rate was 37% (11 cases), disease control rate (DCR) was 97% (29 cases), objective response rate (ORR) was 67% (20 cases). The forced expiratory volume in one second (FEV1) after treatment was (2.59±0.63) L, and the ratio of FEV1 to the predicted value (FEV1%pred) was 85.27%±15.86%, which were significantly higher than those before treatment [(2.48±0.59)L, 81.73%±15.94%, respectively] (P=0.013, 0.022, respectively). Forced vital capacity (FVC) after treatment was (3.59±0.77) L, which was also significantly higher than before [(3.47±0.76) L,P=0.036]; while there were no statistical difference in FEV1/FVC and FVC accounted for the proportion of predicted values (FVC%pred) between before and after treatment (P=0.084, 0.344, respectively). The ratio of carbon monoxide dispersion (DLCO) to the predicted value (DLCO%pred) decreased from 83.61%±13.10% to 78.69%±13.85% after treatment (P=0.023). There was no significant difference in the incidence of postoperative complications between the DLCO%pred decreased group and the non-decreased group (3/18 vs 0/6; P=0.546). Conclusions: Neoadjuvant immunotherapy can increase the rate of MPR and PCR, significantly increase FEV1 and FEV1%pred, but also lead to a decrease in DLCO%pred; neoadjuvant immunotherapy does not increase the incidence of postoperative complications.

NUT Midline Carcinoma Mimics Anaplastic Thyroid Carcinoma

Introduction/Objective

NUT carcinoma (NC) is an extremely rare, aggressive subtype of squamous cell carcinoma defined by rearrangement of the NUTM1 (aka NUT) gene. NC most commonly arises within the thorax and head and neck and predominantly affects teens and young adults. For the first time, we described a rare case of NC mimics anaplastic thyroid carcinoma.

Methods/Case Report

A 27-year female with no significant past medical history presented with neck pain and swelling for a few months and was noted to have a “thyroid” mass. An ultrasound guided fine needle aspiration of the mass showed a hypercellular specimen composed of highly atypical epithelial cells with irregular nuclear membrane and prominent nucleolus, high nuclear to cytoplasmic ration, dense cytoplasm, lying singly or in flat sheet mixed with acute inflammatory exudate (Fig. A, B). No thyroid follicular cells or colloid are present. It was signed out as suspicious for squamous cell carcinoma since there was no cell block for further workup. A following excisional biopsy demonstrated similar atypical epithelium detached or embedded in skeletal muscle and soft tissue with acute, chronic inflammation and necrosis (Fig C). By immunohistochemical stains, the atypical cells are positive for p40 (Fig D) and p53. The Ki-67 proliferation index is ranging from 40 % to 70 %. Scattered tumor cells are weakly positive for PAX-8 and TTF-1. These findings raise the possibility that the squamous cell carcinoma might be a component of anaplastic thyroid carcinoma. However, molecular studies revealed a NSD3-NUTM1 fusion, which is characteristically identified in a subtype of squamous cell carcinoma know as NUT “midline” carcinoma.

Results (if a Case Study enter NA)

NA

Conclusion

Diagnosis of NC can be established by positive NUT nuclear immunohistochemical staining. Recognizing the typical morphology and keeping low threshold for the NUT immunohistochemical staining will increase the diagnostic efficacy.

Application of CRISPR/Cas9 System to Reverse ABC-Mediated Multidrug Resistance

Multidrug resistance (MDR) is the main obstacle in cancer chemotherapy. ATP-binding cassette (ABC) transporters can transport a wide range of antitumor drugs out of cells, which is the most common reason in the development of resistance to drugs. Currently, various therapeutic strategies are used to reverse MDR, among which CRISPR/Cas9 gene editing technique is expected to be an effective way. Here, we reviewed the research progress of reversing ABC-mediated drug resistance by CRISPR/Cas9 system.

Grape-seed polyphenols inhibit AAA in mice via regulation of macrophage polarization

AIM

Abdominal aortic aneurysm (AAA) is characterized by macrophage polarization, and at present, no drug therapy is available. Although grape-seed polyphenols (GSP) showed an anti-AAA effect, the role of GSP in the phenotype shift in macrophages remains unknown.

METHOD

The main phenolic compounds in GSP were determined by LC-MS. Male C57BL/6 mice were divided into four equal groups, namely sham group, CaPO4 group, CaPO4+GSP low-dose group, and CaPO4+GSP high-dose group. GSP was administered intragastrically after CaPO4 application. Molecular expressions were histologically evaluated and analyzed by various staining assays and FACS.

RESULTS

GSP administration inhibited CaPO4-induced AAA formation, which correlated with a decrease in macrophage infiltration and retainment of vascular smooth muscle layer as compared to those in the CaPO4 group. FACS assay showed that the GSP administration dose-dependently decreased the CD54 expression (low-dose group: 11.4 ± 2.1 % and high-dose group: 4.8 ± 1.4 % vs 23.2 ± 3.6 %; p < 0.05 and p < 0.01, respectively) and increased the CD206 expression of F4/80-positive cells in GSP-administered groups as compared with that in CaPO4-injured aortas in the CaPO4 group (low-dose group: 22.4 ± 3.3 % and high-dose group: 26.7 ± 4.2 % vs 8.1 ± 1.3 %; p < 0.05 and p < 0.01, respectively).

CONCLUSIONS

GSP could be a pharmacologically potent agent in the treatment of AAA (Tab. 1, Fig. 3,Ref. 20). Text in PDF www.elis.sk Keywords: grape-seed polyphenols, abdominal aortic aneurysm, macrophage, inflammatory, polarization.

Spatial genetic structure and historical demography of East Asian wild boar

Pleistocene climatic fluctuations may have had a profound impact on the evolutionary history of many species. The geographical pattern of European wild boar (Sus scrofa) is clearly studied, and it was greatly influenced by ancient climatic events, especially the Last Glacial Maximum. Previous research on genetic variation has mainly focused on the origin and distribution histories of domestic pigs. However, some questions have not been answered, including those concerning the genetic diversity, geographical pattern and possible historic influence of climate on East Asian wild boar (EAWB). Employing the control region of mtDNA (511 bp), we investigated the contributions of historic climate, which possibly shaped the genetic pattern of wild boar. Given that the level of genetic diversity of wild boars is higher in East Asia than in Europe, 172 haplotypes were detected from 680 individuals. Phylogenetic analysis demonstrated the complex phylogeographic structure of EAWB. Mismatch analysis, neutrality tests and the Bayesian Skyline Plot results all retrieved signals of a rapid population expansion, which might have played an important role in driving the formation of complex spatial genetic structure. Genetic data and species distribution modelling showed that the Last Glacial Maximum had weak effect on the distribution of the EAWB. We suggest that, in shaping spatial genetic structure in East Asian, long-term gene flow and population history played more important roles than Pleistocene climate fluctuations.

Identification of potential crucial genes associated with vasculogenic mimicry in human osteosarcoma based on gene expression profile

We previously reported the presence of vasculogenic mimicry (VM) in human osteosarcoma. However, the mechanistic basis of osteosarcoma VM remains unclear. Three hundred eighty-one upregulated differentially expressed genes (DEGs) and 526 downregulated DEGs between human osteosarcoma cell line 143B and HOS cell exposed to Matrigel were screened out by microarray. GO categories such as "cell adhesion", "angiogenesis" were enriched in 143B group. PATHWAY analysis showed enriched TGF-beta, Wnt and VEGF signaling pathway in 143B group. The hub gene ITGA2 in signal-network of DEGs exhibited pro-VM and pro-metastasis effect. Our study provides fundamental data for further studies regarding molecules involved in osteosarcoma VM.

[Comparison of antibiotics and saline irrigation with tube drainage in the treatment of postoperative abdominal and pelvic infectious effusion]

Objective: To compare the efficiency of saline irrigation, antibiotics irrigation and high-concentration antibiotics perfusion with tube drainage in the treatment of infectious effusion. Methods: Clinical and sonographic features of abdominal and pelvic infectious effusion of 64 patients with malignant tumor collected from September 2013 to September 2017 were retrospectively analyzed. The changes of effusion size and temperature, catheterization time were evaluated in saline irrigation group and antibiotics irrigation group. The catheterization time was compared between antibiotics irrigation group and high-concentration antibiotics perfusion group. Results: The effective rates of the saline irrigation group and the antibiotics irrigation group were 68.6% and 86.8%, respectively, and the times of catheterization were 11.9±8.4 days and 7.8±4.8 days, respectively, with significantly statistical difference (both P<0.05). However, the effective rates of the antibiotics irrigation group and the high concentration antibiotic perfusion group were 86.8% and 100.0%, respectively (P=0.067), while the times of catheterization were 7.8±4.8 days and 3.6±3.1 days, respectively (P<0.001). Conclusion: The antibiotic irrigation with tube drainage, especially the high concentration perfusion is more effective than saline in the treatment of abdominal and pelvic infection effusion.

P01.01 The role of exosome miRNA between tumor cells and microglias during the progression of medulloblastoma

BACKGROUND

Medulloblastoma (MB) is the most common malignant paediatric brain tumor. Recent studies show that M2 cells were relative more abundant in Shh subtype of MBs compared with other three subtypes. It’s known that M2 cells have close relationship with many tumors’ progression. But if they play any role in the progression of Shh subtype of MB is not yet clear. Many studies demonstrate that exosomes carring miRNAs have close relationship with tumor invasion. The aim of present study is to clarify the role of exosome miRNA between tumor cells and microglias during the progression of Shh subtype of medulloblastoma.

MATERIAL AND METHODS

Immunofluerescence staining using iNOS and Arg1, which is M1 and M2 specific marker, respectively, was performed in four subtypes of MBs. After coculture of exosomes extracted from Shh subtype of MB cell (DAOY) with microglia cell (BV2), Q-PCR and ELISA assay were done to evaluate the polarization status of the microglia. Transwell and scratch assay were then performed to detect the migration ability of DAOY cell after treatment of exosomes from polirized M2 cells. MiRNA sequencing by Ion Proton technology was then done to analyze the miRNAs expression level between Shh subtype and other subtype of MBs. Transformation assay was used to overexpress and inhibit the expression of these miRNAs respectively to further clarify the role of exosome miRNA in the polarization of BV2 cells.

RESULTS

M2 cells were observed more abundant than other three subtypes of tumors, supporting that M2 cells play some role in this subtype of MBs. Exosomes of DAOY cells can induce the polarization of M2 cells. The polarized M2 cells can improved the migration and invasion ability of DAOY cell. Dozens of miRNAs were identified with different expression level between Shh subtype of MBs and other subtype of MB cells. Among them, 4 miRNAs were reported to be related with polariztion of M2 in many other lesions. Three of the 4 miRNAs can induce the polarization of M2 in present study.

CONCLUSION

Our study demonstrated exosome miRNA play a critical role between tumor cells and microglias during the progression of Shh subtype of medulloblastoma.

[miR-449a is a potential epigenetic biomarker for WNT subtype of medulloblastoma]

Objective: To identify the candidate epigenetic biomarkers of Wnt subtype of medulloblastoma(MB). Methods: MicroRNAs(miRNAs) expression array was used to detect the expression of miRNAs in MB cell lines with or without treatment by demethylation reagent. Nanostring gene expression array was used to detect the expression level of mRNA in 45 samples of primary MB. Molecular subtyping was performed based on the NanoString data. The status of methylation was confirmed by methylation specific PCR. The expression of candidate miRNA was confirmed by real-time PCR. Results: All 45 MBs except one were classified into the four molecular groups: 4 in WNT group, 8 in SHH group, 16 were in Group3 and 16 in Group4. Methylation specific PCR (MSP) assay confirmed miR-449a was silenced due to aberrant DNA methylation in MB cell lines.WNT subtype of MBs showed relatively higher expression of miR-449a comparing with other subgroups. Conclusion: MiR-449a, a candidate tumor suppressor gene regulated by hypermethylation, is a novel potential epigenetic marker for WNT subtype of MBs.

[The value of ultrasound classification in BI-RADS category 4 of breast complex cystic masses]

Objective: To analyze the feature of breast complex cystic masses and to classify it at ultrasonography (US), which applied to the Breast Imaging Reporting and Data System (BI-RADS) categories 4a to 4c with pathological results as the golden standards. Methods: The ultrasonographic data and clinical features of 78 patients with complex cystic masses confirmed by pathology in Cancer Hospital from July 2014 to June 2017 were retrospectively reviewed. The complex cystic breast masses were divided into four classes on the basis of their US features: type 1 [thick wall and (or) thick septa (> 0.5 mm)], type 2 (one or more intra-cystic masses), type 3 (mixed cystic and solid components with cystic components more than 50%) and type 4 (mixed cystic and solid components with solid components more than 50%). Positive values (PPVs) were calculated for each type. Multiple linear regression analysis was used to analyze the ultrasonographic features of the masses (lesion size, margins, blood flow resistance index, calcification, and axillary lymph nodes, etc.) with malignant correlation. Results: There were 81 lesions in 78 patients. Among the 81 masses based on US appearance, 14 (17.3%) were classified as type Ⅰ, 18 (22.2%) as type Ⅱ, 18 (22.2%) as type Ⅲ, and 31 (38.3%) as type Ⅳ. The positive predictive values of the malignant lesions of type Ⅰ, type Ⅱ, Ⅲ and Ⅳ were 7.1%, 16.7%, 61.1% and 48.3%, respectively (P=0.040). In all the 81 masses, 14 were BI-RADS categories 4a, 18 were BI-RADS categories 4b and 49 were BI-RADS categories 4c. Masses with maximum diameter equal to or larger than 2.0 cm, unclear margins, RI≥0.7 and presence of abnormal axillary nodes assessment had a high probability of malignancy (P=0.030, 0.038, <0.001 and 0.025, respectively). Conclusion: Ultrasound typing is helpful for differentiating benign and malignant breast complex cysts and classifying BI-AIDS 4a to 4c, thus providing clearer treatment for clinical practice.

[Caries prevention effectiveness of aresin based sealant and a glass ionomer sealants: a report of 5-year-follow-up]

Objective: To evaluate and compare the caries prevention effectiveness of a resin-based sealant and a glass ionomer sealant on permanent first molars in 7- to 9-years-old school children. Methods: A randomized controlled, examiner-blinded, 5-year clinical trial was conducted in 19 primary schools in Dalian, Liaoning province. Totally 419 children (with 664 first molars) who had at least one sound permanent first molar with deep fissures or fissures with signs of non-cavitated lesions were recruited and stratified and allocated randomly into three parallel groups. A resin-based sealant was used in Group R (136 children with 219 first molars) and a glass ionomer sealant was used in Group G (130 children with 218 first molars). The third group (Group N, 153 children with 227 first molars) with none of the two sealants applied was served as blank control. Follow-up examinations were conducted at 0.5, 1, 2, and 5 years after sealing in order to assess the retention of the sealants and the incidence of caries occurrence. Chi-square test was adopted to compare the differences of caries incidence among the 3 groups. Generalized estimating equations (GEE) was used to analyze the effective factors of caries incidence. Results: During the 5-year follow-up period, 13.4% (23/172) of the teeth in Group R, 22.5% (40/178) of the teeth in Group G and 34.5% (57/165) of the teeth in Group N were diagnosed as having developed cavitated lesions. And the differences in the incidence of caries among the three groups was statistically significant (P<0.05). According to GEE, the resin-based sealant and the glass ionomer sealant were found to be the protection factors and the non-cavitated lesion before sealing was found to be the risk factor. The resin-based sealant was found to be the protection factor to the glass ionomer sealant when the blank control group was removed. Conclusions: Both resin-based sealant and glass ionomer sealant could effectively prevent the permanent first molars from the occurrence of carious lesions in 5 years. The resin-based sealant was superior to the glass ionomer sealant in caries prevention.

[Effects of exogenous brain-derived neurotrophic factor on the morphology and function of cochlea in the animal model of hereditary hearing loss]

Objective:To study the effect of early administration exogenous BDNF on the morphology and function of conditional knockout Cx26 mice cochlea.Method:Conditional knockout Cx26 mice was chosen as animal model, early after birth (P0-P2) exogenous BDNF (rAAV mediated BDNF plasmid, AAV-BDNF) was injected through scala media. Expression of BDNF in the cochlea was observed by western-blot, the growth promoting effect of nerve fibers was detected by IHC; 2 m after injection, the protective effect of BDNF on corti and spiral ganglion cells were detected by resin section; animal hearing were tested by ABR.Result:①Exogenous BDNF could be well expressed in the inner ear; ②Exogenous BDNF has a good effect on the growth of cochlea nerve fiber; ③Exogenous BDNF could protect the morphology of organ of corti; to count the number of spiral ganglion cells, using the density value of top-turn in non-injected ear as the standard unit, the values of middle and basal turn in injected ear were 0.81±0.02, 0.65±0.02, compared with non-injected ears, both statistically significant difference could be found, indicates that exogenous BDNF can effectively improve the number of spiral ganglion cells. ④By calculating the ABR threshold of different frequencies of the injected and non-injected ear, there was no statistical difference between them. Indicates that exogenous BDNF has no effect on improving the function of cochlea.Conclusion:The protective effect of early administration exogenous BDNF was effective in the cochlea and spiral ganglion cells of conditional knockout Cx26 mice, but no protective effect for auditory function.

Long non-coding RNA NEAT1 overexpression is associated with unfavorable prognosis in patients with hepatocellular carcinoma after hepatectomy: A Chinese population-based study

AIM

To identify the association between the expression of lncRNA NEAT1 and clinicopathological characteristics of patients with HCC, and to explore the prognostic significance of lncRNA NEAT1 in predicting prognosis of HCC.

METHODS

We retrospectively reviewed 86 patients with HCC (35 female, 51 male) managed in our institution between 2009 and 2014. The expression level of lncRNA NEAT1 was detected by real-time PCR. Prognostic factors were evaluated using Kaplan-Meier curves and Cox proportional hazards models.

RESULTS

For the entire cohort of 86 patients, we showed that the expression level of NEAT1 was significantly higher in HCC tissues compared with non-tumorous tissues and NEAT1 was increased obviously in the HCC cell lines including SMMC-7721, Huh-7 and Hep3B (P < 0.001). MTT assay showed that si-NEAT1 remarkably inhibited the cell proliferation in three HCC cell lines. Moreover, over-expression of lncRNA NEAT1 was closely related to liver cirrhosis (P = 0.026), microvascular invasion (MVI) (P = 0.023), and TNM stage (P = 0.017). After adjusting for competing risk factors, we identified that expression level of lncRNA NEAT1 was an independently risk factor associated with the prognosis of patients with HCC (P = 0.031).

CONCLUSIONS

In this study, we found NEAT1 expressed significantly higher in HCC tissues compared with non-tumorous tissues. Overexpression of lncRNA NEAT1 was an independently risk factor associated with the prognosis of patients with HCC.

Hydroxyapatite/N-doped carbon dots/Ag3PO4 composite for improved visible-light photocatalytic performance

A new ternary hydroxyapatite/N-doped carbon dots/Ag₃PO₄ (HA/N-CDs/Ag₃PO₄) composite with remarkable photocatalytic performance and stability was developed via a cost-effective route.

[Regulation effect of β-catenin pathway on TGF-β1 induced pulmonary pro-fibrosis]

OBJECTIVE

To investigate the regulation effect of β-catenin pathway on transforming growth factor beta1 (TGF-β1) induced pulmonary pro-fibrosis.

METHODS

The rat alveolar typeⅡ cells (RLE-6TN) were divided into four groups: A1.control group; B1.TGF-β1 group was treated with 5 μg/L TGF-β1; C1.pcDNA+ TGF-β1 group was transiently transfected with eukaryotic expression vector pcDNA3.0 (pcDNA) and followed by TGF-β1 treatment (5 μg/L); D1.F-(β-TrCP)-Ecad+ TGF-β1 group was transiently transfected with β-catenin protein knockout vector [F-(β-TrCP)-Ecad] and followed by TGF-β1 treatment (5 μg/L). After 24 hours, cells were observed under the inverted phase contrast microscope, then the expressions of E-cadherin, α-smooth muscle actin (α-SMA) and fibronectin (Fn) in each group were measured by Western blot and the mRNA levels of Snail which was the downstream profibrotic transcription production in cell culture supernatants of each group were detected by real-time fluorescence quantification-polymerase chain reaction (RT-PCR) .The rat alveolar macrophages (CRL-2192) were divided into five groups: A2.control group; B2.Interferon gamma (IFN-γ) group was treated by 20 μg/L IFN-γ; C2.TGF-β1+ IFN-γ group was treated by 20 μg/L IFN-γ with 10 μg/L TGF-β1; D2.F-(β-TrCP)-Ecad+ TGF-β1+ IFN-γ group was transfected with F-(β-TrCP)-Ecad and other dispose was the same as group C2; E2.WTβ-catenin+ TGF-β1+ IFN-γ group was transfected with WTβ-catenin and other dispose was the same as group C2.After 24 hours, protein levels of β-catenin in group A2, B2, C2 were determined by Western blot.Inducible nitric oxide synthase (iNOS) mRNA levels of each group were detected by RT-PCR.

RESULTS

The RLE-6TN cells of group B1, C1 showed a change in morphology to spindle-shaped cells, the cells of group D1 maintained a cobblestone morphology. Protein expressions of the fibroblast markers α-SMA and Fn, and mRNA expressions of the downstream profibrotic transcription production Snail of group B1, C1 were significantly higher than group A1, while protein expressions of the epithelial marker E-cadherin were significantly lower.The protein expressions of α-SMA, Fn and mRNA expressions Snail of group D1 were significantly lower than group C1 (0.352±0.076 vs 0.937±0.303, 0.319±0.072 vs 0.903±0.211, 3.675±0.642 vs 9.708±2.031), while the protein expressions of E-cadherin were significantly higher (1.482±0.227 vs 0.604±0.121) (all P<0.05). The steady state protein levels of β-catenin in CRL-2192 cells was low and β-catenin protein expressions of CRL-2192 cells in group A2, B2 and C2 had no significantly statistical differences.The mRNA expressions of iNOS of group B2 cells were significantly higher than group A2, C2, D2, E2 (64.95±4.47 vs 9.87±0.73, 21.32±2.41, 18.35±3.61, 22.87±3.14) (all P<0.01), the expressions of iNOS of group C2, D2, E2 were all higher than group A2 (all P<0.05), but there were no significant differences among group C2, D2 and E2.

CONCLUSIONS

Inhibition of β-catenin pathway inhibits TGF-β1-induced epithelial-mesenchymal transition (EMT) and has no effect on its anti-inflammation effect.Therefore, β-catenin pathway regulates the pulmonary pro-fibrosis effect of TGF-β1.

The revascularization and follicular survival of mouse ovarian grafts treated with FSH during cryopreservation by vitrification

BACKGROUND

Ovarian cryopreservation by vitrification is a very effective pathway for the preservation of female fertility during radiotherapy and chemotherapy. However, damage of follicles was triggered by cryo-injure during the process of ovarian vitrification and ischemia/reperfusion during the process of ovarian transplantation. Appropriate FSH play important roles in anti-apoptosis and neoangiogenesis during ovarian follicle development.

OBJECTIVE

Therefore, the purpose of this study was to investigate the effect of FSH on the revascularization and follicular survival of vitrified-warmed ovarian grafts.

MATERIALS AND TMETHODS

Four-week-old C57BL/6J mice with diestrus were used and the ovaries were randomized into the following three groups: fresh control group (FCG), vitrified/warmed group (VCG) and vitrified/warmed group treated with 0.3 IU/mL FSH (FSH-VG) during ovarian vitrification. After warming, the ovaries of the three groups were allotransplanted into the renal capsule of receptor mice. Assessment of follicular quantity was performed by histological analysis. The angiogenesis factors, CD31 and MMP-2, and cell survival factors, PCNA, EdU and survivin were examined by immunohistochemistry and western blot analysis. Angiogenesis was detected by vascular perfusion with the fluorescent dye 2MD-FITC-Dextran.

RESULTS

The expression of CD31and MMP-2 were not significantly different in either VCG or FSH-VG compared with FCG, but when the ovaries were transplanted 48 hours later, the expression levels of CD31 and MMP-2 were lower for VCG than FCG (P < 0.05) and FSH-VG was not significantly different from FCG. Before transplantation, the expression levels of PCNA and survivin were lower for VCG and FSH-VG than FCG (p < 0.05), but FSH-VG was higher than VCG (p < 0.05). After 48 h of ovarian transplantation, the expression of survivin was lower for VCG than FCG (P < 0.05), but FSH-VG was not significantly different from FCG. In addition, these data were further supported by the results from detecting the 2MD-FITC-Dextran and EdU.

CONCLUSION

Taken together, supplementation with 0.3 IU/mL FSH during ovarian cryopreservation by vitrification increased the revascularization and follicular survival for mouse ovarian grafts through the up-regulated expression of angiogenesis and ovarian survival factors.

Potential hepatoprotective effects of fullerenol nanoparticles on alcohol-induced oxidative stress by ROS

The free radical scavenging ability of fullerenols is their most exploited property in biomedical studies.

Appropriate Osmotic Balance Duration for Different Volumes of Ovarian Tissue in Vitrification Solution: a Study of Ovary Tissue Vitrification and Transplantation in Sheep

BACKGROUND: Auto-transplantation of cryopreserved ovarian tissue has become a promising method for fertility preservation and standardization of the process is crucial for practical applications.

OBJECTIVE

Here we used different size of large sheep ovarian cortex to study the most suitable osmotic balance durations in the vitrification solution for large piece ovary cortex.

MATERIALS AND METHODS

The ovarian cortices from six-month old female sheep were divided into 40 cubic mm, 80 cubic mm and 160 cubic mm volume, A two-step osmotic balance method was used based on the results from morphological and histological study, we detected the expression of VEGF after thawing, the percentage of follicles that survived and serum E2 levels,together with apoptosis test by TUNEL.

RESULTS

the morphology of follicles and stromal cells were the best when the osmotic balance duration was 7 min, 11 min and 19 min, respectively. Osmotic balance time(T) is proportional to the area(S), we deduced that areas(S) of large pieces of ovarian cortex in vitrification fluid conformed to the standardized osmotic balance time(T) formula; i.e., T=（S+15)/5 (22~24C, sample thickness 1-2 mm), In vitro culture of vitrification-thawed large cortex ovaries and xenogenic heterotopic transplantation by using the standardized osmotic balance duration formula were both successful.

CONCLUSION

Formula T=（S+15)/5 can be used to calculate optimal osmotic balance duration for different size of ovarian cortexes during vitrification.

Effects of dietary supplementation of fulvic acid on lipid metabolism of finishing pigs

The experiment was conducted to investigate the effects of dietary supplementation of fulvic acid on lipid metabolism of finishing pigs. One hundred eighty crossbred barrows (Landrace × Yorkshire, 60 ± 2.5 kg) were randomly allotted to 5 dietary treatments (36 pigs/treatment) and fed a basal diet supplemented with 0, 0.2%, 0.4%, 0.6%, and 0.8% fulvic acid for 42 d. Thirty pigs (6 pigs/treatment) were slaughtered at the end of the experiment. Blood samples and adipose tissue were collected for determination of blood parameters and lipid metabolic enzymes. The results showed that compared with the control group, dietary supplementation of 0.2%, 0.4%, and 0.6% fulvic acid significantly reduced mean backfat thickness of pigs (P < 0.05). The serum concentrations of low-density lipoprotein, leptin, growth hormone, insulin, and triiodothyronine were significantly increased by adding fulvic acid in diets (P < 0.05). With the raised concentration of dietary fulvic acid, hormone sensitive lipase (HSL) activity was significantly increased (P < 0.05), and lipoprotein lipase (LPL) activity was significantly decreased (P < 0.05) in adipose tissue. In conclusion, dietary supplementation of fulvic acid reduced the mean backfat thickness of pigs. This change related to the increased activity of HSL and the decreased activity of LPL in adipose tissue.

Long-term efficacy and safety of infliximab maintenance therapy in patients with plaque-type psoriasis in real-world practice

BACKGROUND

Tumour necrosis factor-α inhibitors, including infliximab (IFX), can improve disease control of plaque-type psoriasis.

OBJECTIVES

The Real-World Assessment of Long-Term Infliximab Therapy for Psoriasis (REALITY) study evaluated the efficacy and safety of maintenance IFX therapy in typical clinical settings.

METHODS

In this prospective, observational, open-label, multicentre study in patients with plaque-type psoriasis, IFX 5 mg kg was infused at weeks 0, 2 and 6, and every 8 weeks thereafter during a 50-week treatment phase. The primary outcome was ≥ 75% Psoriasis Area and Severity Index (PASI) improvement from baseline to week 50. Patients with ≥ 25% PASI improvement from baseline to the end of the treatment phase were potentially eligible to enter a 48-week extended treatment phase. Response maintenance and other efficacy measures were evaluated. Adverse events (AEs) were collected.

RESULTS

In total 660 patients enrolled. Of 521 efficacy-evaluable treatment phase patients (66% male, mean age 46·5 years, mean PASI 18·1), 56·8% achieved PASI 75 at the end of the treatment phase. Response was maintained at week 50 by 64·7% (205/317) of patients who achieved PASI 75 at week 14. During extended treatment, 66·3% (112/169) of patients attained PASI 75 at week 98; response was maintained at week 98 by 71·6% (101/141) of those who achieved PASI 75 at week 50. IFX was generally well tolerated. During treatment, 7·6% (50/659) of patients had serious AEs. During extended treatment, 4·1% (eight of 193) of patients had serious AEs.

CONCLUSIONS

PASI 75 response was achieved by 56·8% and 66·3% of patients at weeks 50 and 98, respectively. The AE pattern was consistent with previous reports.

Growth and viability of Liaoning Cashmere goat hair follicles during the annual hair follicle cycle

Here, we studied hair follicle development of Liaoning Cashmere goats. Every month for 1 year, skin samples were collected from five 1.5-year-old female goats, and made into paraffin sections. A number of parameters were measured of primary and secondary hair follicles via microscopic observation including follicle depth, hair bulb width, dermis and epidermis thickness, changes in follicle activity, and histology. The results showed the presence of three phases in the annual hair cycle: anagen, catagen, and telogen. Primary and secondary hair follicle depth varied across the months; however, no significant difference was obtained between adjacent months (P>0.05). Primary hair follicles had a bigger hair bulb width compared to secondary hair follicles; however, this difference declined during hair follicle developed in anagen. As hair follicle growth slowed, the hair bulb broadened, and hair root depth became shallower. During the entire hair cycle, hair follicle depth and dermis thickness were positively correlated; however, this relationship was not significant (P>0.05) for primary and secondary hair follicle density and the ratio of secondary hair follicle density and primary hair follicle density (S/P ratio). In addition, new and old primary hair follicles coexisted with secondary hair follicles. Finally, secondary hair follicles had a higher activity rate compared to primary hair follicle in adult Liaoning Cashmere goats in certain months.

Clinical analysis of sentinel lymph node identification in patients with cervical cancer

OBJECTIVE

To study the accuracy and feasibility of identifying sentinel lymph nodes (SLN) using methylene blue dye in patients with cervical cancer.

MATERIALS AND METHODS

Fifty-six cases with early-stage cervical cancer patients were studied using methylene blue injection into the cervix 90-120 minutes before abdominal pelvic lymph node dissection and extensive hysterectomy. The lymph nodes that resulted from staining were removed and pathohistology was performed.

RESULTS

A total of 106 SLN were identified in 49 patients (49/56). The detection rate of SLN was 87.5%. Sensitivity of the SLN was 90.91%, and specificity of the sentinel lymph nodes was 86.67%. Eleven patients (19.64%) were diagnosed with lymph node metastases and ten of them were in the group of SLN. Eight patients had positive SLN only. Two patients had both positive SLN and pelvic lymph nodes. None of the patients had positive pelvic lymph nodes and negative SLN.

CONCLUSION

The use of methylene blue injection for cervical cancer SLN biopsy has a higher detection rate of SLN. SLN detection can accurately predict the pathological status of pelvic lymph nodes in patients with cervical cancer.

Virally expressed connexin26 restores gap junction function in the cochlea of conditional Gjb2 knockout mice

Mutations in GJB2, which codes for the gap junction protein connexin26, are the most common causes of human nonsyndromic hereditary deafness. We inoculated modified adeno-associated viral vectors into the scala media of early postnatal conditional Gjb2 knockout mice to drive exogenous connexin26 expression. We found extensive virally-expressed connexin26 in cells lining the scala media, and intercellular gap junction network was re-established in the organ of Corti of mutant mouse cochlea. Widespread ectopic connexin26 expression neither formed ectopic gap junctions nor affected normal hearing thresholds in wild type mice, suggesting that autonomous cellular mechanisms regulate proper membrane trafficking of exogenously-expressed connexin26 and govern the functional manifestation of them. Functional recovery of gap-junction-mediated coupling among the supporting cells was observed. We found that both cell death in the organ of Corti and degeneration of spiral ganglion neurons in the cochlea of mutant mice were substantially reduced, although auditory brainstem responses did not show significant hearing improvement. This is the first report demonstrating that virally-mediated gene therapy restored extensive gap junction intercellular network among cochlear non-sensory cells in vivo. Such a treatment performed at early postnatal stages resulted in a partial rescue of disease phenotypes in the cochlea of the mutant mice.

Study of lipids, insulin metabolism, and paraoxonase-2-311 polymorphism in patients with different subtypes of Alzheimer's disease (translated version)

OBJECTIVE

To investigate the characteristics of blood lipids, insulin metabolism, and paraoxonase-2-311 (PON2-311) polymorphism among patients with Alzheimer's disease with different types of dementia.

METHODS

A total of 84 patients with Alzheimer's disease, according to the National Institute of Neurological and Communicative Disorders and Stroke, and the Alzheimer's disease and Related Disorders Association clinical criteria for 'possible Alzheimer's disease', and with no family history of the condition, were enrolled. They were then categorised into 3 groups (senile dementia, presenile dementia, and mixed dementia) according to the diagnostic criteria of the Chinese Classification of Mental Disorders, third edition. Polymerase chain reaction-restriction fragment length polymorphism analysis was used to determine the presence of PON2-311 polymorphism. Serum cholesterol, triglycerides, high-density lipoprotein, low-density lipoprotein, and fasting blood sugar were measured. Fasting plasma insulin was measured using chemiluminescence. The basal-state method was used to assess insulin resistance expressed as insulin sensitivity index. The cognitive rating scale of the Mini-Mental State Examination, Activities of Daily Living scale, and Hachinski Ischemic Scale were used to establish the clinical features and severity of cognitive impairment. Differences in PON2-311C/S polymorphism, serum insulin, blood glucose, blood lipids, and neuropsychological score were analysed.

RESULTS

The serum triglyceride and cholesterol levels of the presenile dementia group were significantly higher than those of the senile and mixed dementia groups (p < 0.01). The high-density lipoprotein level of the senile dementia group was significantly higher than that of the mixed dementia group (p < 0.05). The serum insulin level of the presenile dementia group was significantly higher than that of the senile (p < 0.05) and mixed dementia groups (p < 0.01). There were no significant differences in distribution of the PON2-311 genotypes C/C, C/S, and S/S between the senile and mixed dementia groups, and no significant differences in C-allele and S-allele frequency between the 2 groups.

CONCLUSIONS

The differences in serum triglycerides, cholesterol, high-density lipoprotein, and insulin levels between Alzheimer patients with senile, presenile, and mixed dementia found in this study suggest that patients with presenile dementia should monitor their lipid and insulin metabolism. No significant differences were found for PON2-311 genotypes or allele frequencies in patients with dementia due to Alzheimer's disease.

Elevated expression of connective tissue growth factor, osteopontin and increased collagen content in human ascending thoracic aortic aneurysms

Little is known about the molecular mechanisms of ascending thoracic aortic aneurysms (ATAAs). Abnormal extracellular matrix changes and variations of vascular smooth muscle cells (VSMCs) have been implicated in abdominal aortic aneurysm formation. Our objective was to investigate the alterations of collagen, stimulators of collagen synthesis and synthetic VSMCs in patients with ATAA. Surgical samples from ATAA were taken from 20 patients, and 18 control aortas were obtained during coronary artery bypass surgery. All aortic wall specimens were fixed for histology and immunohistochemistry for collagen, connective tissue growth factor (CTGF) and osteopontin. Realtime polymerase chain reaction was used to determine their mRNA expression. Histology and semi-quantitative analysis demonstrated that protein levels of collagen, CTGF and osteopontin significantly increased by 1.9-, 1.4- and 2.2-fold, respectively ( P < 0.01 for all) in the ATAA group than in the control group. Similar results were shown in mRNA levels of type Iα1and IIIα1 collagen, CTGF and osteopontin. The protein levels of CTGF and osteopontin were positively correlated with aortic diameter ( r = 0.67, r = 0.73; P < 0.01 for both). In conclusion, overexpression of aortic CTGF and synthetic VSMCs marker (osteopontin), which is likely to be responsible for elevated aortic collagen content, may provide a potential mechanism for aneurysmal enlargement.