Effects of kisspeptin-10 on the reproductive performance of sows in a fixed-time artificial insemination programme.

Kisspeptin (KP) is a major positive regulator of the hypothalamo-pituitary-gonadal axis and affects female reproductive cyclicity in mammals. It offers an attractive alternative strategy to control reproduction in fixed-time artificial insemination (FTAI) protocols. We aimed to evaluate the effects of different doses of kisspeptin-10 (KP-10) on sow reproductive performance in FTAI protocols. One hundred ninety-eight weaned sows were divided into three groups at random. A FTAI-GnRH group of sows (n = 98) received 100 µg (2 mL) gonadotropin-releasing hormone (GnRH; gonadorelin) by intramuscular injection at 96 h after weaning (t = 0 h); FTAI-KPL (KPL: low-dose KP-10, n = 50), and FTAI-KPH groups of sows (KPH: high-dose KP-10, n = 50) received 0.5 or 1 mg KP-10 (2 mL) respectively at 96 h after weaning. Sows were checked twice daily for oestrus. Ultrasonographic evaluations were performed to determine the follicular diameter and time of ovulation; blood samples were collected immediately before injection (t0 = 0 min) and at 15, 30, 45, 60, 75, 90 min, 24 and 48 h postinjection. Sows were inseminated at 112 and 132 h after weaning. The oestrus rates (96 vs 92%; 96 vs 88%) and weaning-to-oestrus intervals (98.9 vs 98.6 h; 98.9 vs 97.1 h) were not affected by treatment, but oestrus in the FTAI-KPL group was significantly longer than in the FTAI-GnRH group (38.7 vs 30.0 h; P < 0.05). The peak LH concentrations were 1.29 times greater than at t0 = 0 in the FTAI-GnRH group, and 1.45 and 1.44 times greater than at t0 = 0 in the FTAI-KPL and FTAI-KPH groups, respectively. Follicular diameters and pregnancy rates (86 vs 88%, 86 vs 80%, respectively) did not differ between the treatments. Moreover, the total numbers of piglets born and those born alive did not differ among the three groups. These findings suggested that 0.5 mg KP-10 given at 96 h after weaning could be used in FTAI programmes to manage batch farrowing in sows.

Tumor-derived exosomal miR-103a-2-5p facilitates esophageal squamous cell carcinoma cell proliferation and migration.

OBJECTIVE: This study aimed to identify the different expression of microRNAs (miRNAs) in the plasma derived exosomes of patients with esophageal squamous cell carcinoma (ESCC). PATIENTS AND METHODS: A total of 9 patients with ESCC and 9 patients with benign diseases were involved. miRNA sequencing was performed to screen differential expression of microRNAs in plasma exosomes between patients with ESCC and controls. The function of miRNA on proliferation and migration abilities was determined by CCK-8 analysis, wound scratch and transwell test. Predicted target genes were screened by databases and confirmed by RT-qPCR. RESULTS: We identified a total of 10 miRNAs (7 upregulated and 3 downregulated) that were differentially expressed in plasma exosomes between patients with ESCC and control patients (fold change, FC ≥ 2.0 or ≤ -2.0, p ≤ 0.05) by miRNA sequencing. Ten miRNAs were detected by qRT-PCR to verify the results of the miRNA sequencing. MiR-103a-2-5p demonstrated the most significant differential expression in both exosomes of ESCC cell lines and plasma of patients as compared with control patients and was therefore selected for subsequent functional experiments. Overexpression of miR-103a-2-5p promoted proliferation and migration in TE-1 cells, whereas inhibition of miR-103a-2-5p suppressed proliferation and migration in KYSE-150 cells. Exosomes extracted from the cells transfected with miR-103a-2-5p mimics significantly increased the proliferation and migration of two ESCC cell lines. Two genes, CDH11 and NR3C1 were identified as predicted targets of miR-103a-2-5p by the bioinformatics tools TargetScan, MiRanda, and mirDIP and RT-qPCR. CONCLUSIONS: Our results shed light on how exosomal miR-103a-2-5p can promote proliferation and migration of ESCC cells and may represent a potential target for ESCC therapies.

Visceral pleural invasion impacts the prognosis of non-small cell lung cancer: A meta-analysis.

BACKGROUND: In the 7th tumor, node, metastasis (TNM) classification, T1 tumors with visceral pleural invasion (VPI) are upgraded to T2a. The objective of this study was to evaluate the prognostic impact of VPI among patients with NSCLC and to propose a method of incorporating VPI into T-status classification in future staging systems. METHODS: A systematic electronic search was conducted from each database's date of inception to October 2015. The included studies were selected according to predefined inclusion criteria. The hazard ratio (HR) was used as the outcome measure for data combining. RESULTS: A total of 22 studies, published from 2003 to 2015, were included in this meta-analysis. In the subgroup analysis, we identified that VPI was a poor prognostic factor for tumor size ≤2 cm (2.34 [95% confidence interval (CI) 1.55-3.54; P < 0.0001]), 2-3 cm (1.81 [95% CI 1.56-2.10; P < 0.0001]), 3-5 cm (1.61 [95% CI 1.38-1.87; P < 0.0001]) and 5-7 cm (1.50 [95% CI 1.24-1.82; P < 0.0001]). In addition, we also found that there were no significant differences for the following comparisons of OS: tumor size ≤2 cm with VPI versus 3-5 cm without VPI (1.04 [95% CI 0.83-1.31; P = 0.34]); 2-3 cm with VPI versus 3-5 cm without VPI (1.04 [95% CI 0.96-1.13; P = 0.30]); 3-5 cm with VPI versus 5-7 cm without VPI (0.95 [95% CI 0.78-1.17; P = 0.66]); and 5-7 cm with VPI versus T3 status (1.03 [95% CI 0.93-1.14; P = 0.57]). CONCLUSIONS: In addition to the current TNM classification recommendations, consideration should be given to classifying the T2a tumors with VPI as T2b and classifying T2b with VPI as T3 in the next edition of the TNM Classification for Lung cancer.

Use of oesophageal flap valvuloplasty and wrapping suturing technique in preventing postoperative complications after oesophagectomy for oesophageal cancer.

BACKGROUND: Esophagogastrostomy for oesophageal cancer is the standard surgical treatment. However, traditional techniques have been associated with high frequency of anastomotic complications. The purpose of this study is to clarify the superiority of the oesophageal flap valvuloplasty and wrapping suturing technique in preventing postoperative complications after oesophagectomy for oesophageal cancer. METHODS: A prospective, randomised study was performed on 394 patients treated for esophageal cancer between January 2006 and December 2010. The trial registry number is ChiCTR-TRC-13003817 in the Chinese Clinical Trial Registry. RESULTS: Anastomotic leaks occurred in four patients in group A (2.1%) and in twelve patients in group B (6.2%) with statistically significant (P = 0.038). During the evaluation of benign stricture seven patients were excluded for hospital mortality. Thirty three patients in group A (6.9%) and 25 patients in group B (13.2%) occurred anastomotic stricture respectively (P = 0.044). Furthermore, reflux oesophagitis and Barrett's epithelium were found in 105 patients (55.3%) of group B, and 54 (28.7%) patients in group A (P < 0.001). CONCLUSION: The oesophageal flap valvuloplasty and wrapping suturing technique decreased anastomotic leakage incidence and stricture rate thereby decreasing the morbidity and mortality. This procedure also prevented the occurrence of gastroesophageal reflux after esophagectomy.

Effects of Chinese herbal polysaccharides on the immunity and growth performance of young broilers.

Two trials were conducted to study the effects of two Chinese herbal polysaccharides [achyranthan (ACH), a low-molecular-weight polysaccharide, and astragalan (APS), a high-molecular-weight polysaccaride] on the immunity and growth performance of young broilers. Trial 1 was a 28-d growth assay, in which 7-d-old broilers (n = 240) were randomly allotted to one of three dietary treatments, with eight replicate pens per treatment and ten chickens per pen. Dietary treatments included a control corn-soy-fishmeal (Treatment 1), a diet with 200 mg/kg APS (Treatment 2), and a diet with 200 mg/kg ACH (Treatment 3). Blood samples were collected by cardiac puncture on Days 7, 14, 21, and 28 for determination of serum parameters, and chickens were killed on Day 28 to measure immune organ indexes. Trial 2 was an in vitro trial to study the effects of different concentrations of polysaccharides on broiler splenocyte functions. In Trial 1, feeding either APS or ACH had no significant effects on growth performance of broilers relative to the control. However, compared to the control, feeding ACH significantly increased microhemagglutination inhibition (HI) antibody titers, bursa of Fabricius index, serum albumin, serum calcium, and nitric oxide (NO) concentrations at Day 28 (P < or = 0.05). In Trial 2, both polysaccharides showed significant immunostimulating effects. They increased NO and interleukin-2 (IL-2) production of splenocytes and enhanced splenocyte proliferation in a dose-dependent manner (P < 0.05). Those results indicate that the immunostimulating effects of APS are not as pronounced as those of ACH. Achyranthan showed immunostimulating effects in both the growth assay and in vitro studies. Therefore, ACH may be a Chinese herbal polysaccharide that has the potential to be used as a feed additive to improve broilers' immunity.

[The study of genetic variability of mtDNA in common laboratory inbred strains of mice].

The genetic variation of mtDNA among 7 common laboratory inbred strains of mice was analyzed by PCR-RFLP and PCR-SSCP techniques. D-loop, tRNA(Met + Glu + Ile) and ND3 fragments of mtDNA from the mices showed no variation in 46 endonuclease sites; Deeply analyzed by PCR-SSCP, the D-loop 5' fragment and 3' fragment of mtDNA from these mice also show no genetic variation. Because of maternal mode of inheritance of mtDNA, the results indicate that only one female lineage contributed to the formation of all these common inbred strains of mice.

[Studies on single cell cloning of Ginkgo biloba L].

OBJECTIVE: To investigate the relations of the productivity stability of to the homogenization of Ginkgo biloba cells by single cell clones. METHOD: Using plant single cell plate culture technique. RESULTS: Adding 500 ml.L-1L-glutamine in the medium increased greatly the cell plating efficiency (PE), and within the range 0.5-5.0 x 10(4) Cell.ml-1 of the initial cell density, the PE increased with the increment of the cell density. Of the 48 cell clones obtained, the GKB content in G-22 clone reached 0.099%; and most of the clones remain stable in growth and GKB production during subcultures. CONCLUSION: During the cell and tissue culture of G. biloba, the application of plant single cell cloning technique helps to a certain extent solve the problem of productivity instability of ginkgolide.