Circ-DONSON promotes malignant progression of glioma through modulating FOXO3.

OBJECTIVE: The aim of this study was to investigate the expression level of circ-DONSON in glioma and to explore its effect on glioma metastasis and the underlying mechanism. PATIENTS AND METHODS: Quantitative Real Time-Polymerase Chain Reaction (qRT-PCR) was performed to examine circ-DONSON expression in 40 paired glioma tumor tissues and adjacent tissues. Meanwhile, the relation between circ-DONSON level and clinical parameters of glioma and the prognosis of patients was analyzed. The expression of circ-DONSON in glioma cell lines was analyzed by qRT-PCR as well. In addition, circs-DONSON silencing model was constructed in glioma cell lines. Cell counting kit-8 (CCK-8), cell scratch, and transwell migration assays were performed to investigate the effect of circ-DONSON on biological functions of glioma cells. Finally, the interplay between FOXO3 and circ-DONSON was explored. RESULTS: QRT-PCR results revealed that the expression level of circ-DONSON in glioma tumor tissues was remarkably higher than that of adjacent tissues, and the difference was statistically significant (p<0.05). Compared with patients with low expression of circ-DONSON, significantly higher prevalence of lymph node or distant metastasis and worse prognosis were observed in patients with high expression of circ-DONSON (p<0.05). The proliferation and migration abilities of glioma cells in circ-DONSON silenced group were remarkably suppressed when compared with NC group (p<0.05). Additionally, FOXO3 expression was remarkably down-regulated in glioma cell lines and tissues. FOXO3 expression was negatively correlated with circ-DONSON expression. In addition, cell reverse experiment demonstrated that circ-DONSON and FOXO3 can regulate each other, thereby together affecting the malignant progression of glioma. CONCLUSIONS: Circ-DONSON was remarkably associated with lymph node or distant metastasis, as well as poor prognosis of patients with glioma. Furthermore, it promoted the metastasis of glioma cells via regulating FOXO3.

Unexpected requirement for a binding partner of the syntaxin family in phagocytosis by murine testicular Sertoli cells.

Testicular phagocytosis by Sertoli cells (SCs) plays an essential role in the efficient clearance of apoptotic spermatogenic cells under both physiological and pathological conditions. However, the molecular mechanism underlying this unique process is poorly understood. Herein, we report for the first time that α-taxilin protein (TXLNA), a binding partner of the syntaxin family that functions as a central player in the intracellular vesicle traffic, was dominantly expressed in SCs. Induction of apoptosis in murine meiotic spermatocytes and haploid spermatids by busulfan treatment stimulated a significant increase of TXLNA in SCs at day (d) 14 and d 24 after busulfan treatment, respectively. Consistently, TXLNA expression was steadily upregulated when SCs were co-cultured with apoptotic germ cells (GCs). Moreover, using siRNA treatment, we found that ablation of endogenous TXLNA significantly impaired the phagocytotic capacity of SCs and thereby resulted in defective spermiogenesis and reduced fertility during the late recovery after testicular heat stress. Mechanistically, upregulation of TXLNA expression by apoptotic GCs was associated with the stabilization of ATP-binding cassette transporter 1 (ABCA1), a transporter-mediated lipid efflux from SCs and influencing male fertility. TXLNA acted as an upstream suppressor of ABCA1 ubiquitination and thus promoted ABCA1 stability and accumulation following GC apoptosis. We further provide in vitro evidence that epidermal growth factor receptor (EGFR)-mediated phosphorylation regulated ABCA1 ubiquitination and was enhanced by TXLNA deficiency during testicular phagocytosis. Taken together, the TXLNA/ABCA1 cascade may serve as an important feedback mechanism to modulate the magnitude of subsequent phagocytotic process of SCs in response to testicular injury.

Human papilloma virus screening by hybrid capture II in chinese women of Jiangsu Province / Tamizaje del virus del papiloma humano mediante captura híbrida en mujeres chinas de la Provincia de Jiangsu

OBJECTIVE: To survey Human Papilloma Virus (HPV) infection in Chinese Women of Jiangsu Province and discuss the relationship between HPV and the biology of cervical cancer. METHODS: Two thousand, one hundred and fifty-three sexually active women (including 66 cases of cervical cancer) were selected for high-risk human papilloma virus DNA test with Hybrid Capture II (HCII). RESULTS: The overall HPV prevalence was 32.6% (701/2153) with higher positive rates in cervical carcinoma and Cervical Interstitial Neoplasia (CIN) [93.9% and 54.6%] respectively. For women aged 40-59 years, the overall high-risk HPV prevalence was higher than those of other age groups. Compared with CIN I, the positivity rate and viral load of HPV DNA in CIN III is much higher (80.2% vs 29.9%, 11.89 vs 0.53). Ninety-four per cent (64/66) of patients with Cervical cancer were detected to be HPV positive. There was no significant difference in HPV DNA among each clinical stage and pathologic grade. But the positive rates and the value of HPV DNA were higher in the patients with cervical interstitial incursion. Eighty per cent of patients (20/25) could become negative within six months after operation. CONCLUSIONS: High-risk HPV DNA test is effective in screening for cervical diseases. HC II is an effective method to detect HPV DNA.

OBJETIVO: Investigar la infección por el virus del papiloma humano (VPH) en las mujeres chinas de la Provincia de Jiangsu y analizar la relación entre VPH y la biología del cáncer cervical o del cuello uterino. MÉTODOS: Dos mil ciento cincuenta y tres mujeres sexualmente activas (incluyendo 66 casos de cáncer cervical) fueron seleccionadas para una prueba de ADN con el fin de detectar el virus del papiloma humano de alto riesgo mediante Captura Híbrida 2 (HC2). RESULTADOS: La prevalencia general de VPH fue 32.6% (701/2153), hallándose las tasas positivas más altas en el carcinoma cervical y la neoplasia intersticial cervical (NIC) [93.9% y 54.6%]. Para las mujeres de 40-59 años de edad, la prevalencia general de VPH de alto riesgo fue mayor que para los otros grupos etarios. En comparación con el CIN, la tasa de positividad y la carga viral de ADN del VPH en el CIN es mucho mayor (80.2% vs 29.9%, 11.89 vs 0.53). Se detectó que noventa y cuatro por ciento (64/66) de las pacientes con cáncer del cuello uterino eran VPH positivas. No hubo ninguna diferencia significativa en el ADN del VPH ADN entre cada fase clínica y el grado patológico. No obstante, tanto las tasas positivas como el valor de VPH ADN fueron más altos en las pacientes con incursión intersticial cervical. Ochenta por ciento de las pacientes (20/25) podrían volverse negativas en seis meses tras la operación. CONCLUSIONES: La prueba de ADN para la detección del virus del papiloma humano de alto riesgo es un medio efectivo para el tamizaje de las enfermedades cervicales. El HC2 es un método efectivo para detectar el ADN del VPH.

Biotransformation of piceid in Polygonum cuspidatum to resveratrol by Aspergillus oryzae.

Biotransformation of piceid in Polygonum cuspidatum to resveratrol by Aspergillus oryzae was investigated in this study. Resveratrol is widely used in medicine, food, and cosmetic because of its pharmacological properties. However, it has a much lower content in plants compared with its glucoside piceid, which has a much lower bioavailability. Traditionally, the aglycone is acquired by acid or enzymatic hydrolysis of its glucoside, but the violent condition and the acid pollution in hydrolytic reaction and the high cost of the enzyme limit their industrial development. In this paper, fermentation of P. cuspidatum by A. oryzae was successfully performed, during which, piceid was converted to resveratrol with the highest yield of trans-resveratrol 1.35%, 3.6 times higher than that obtained from raw herb by microwave-assisted extraction. Scale-up production was also performed and the yield of trans-resveratrol was 3.1 times higher after 24 h incubation. Therefore, biotransformation is a better method to increase the yield of resveratrol because of its high yield and mild conditions.

Assessment of population genetic structure in common wild rice Oryza rufipogon Griff. using microsatellite and allozyme markers.

The genetic structure of five natural populations of common wild rice Oryza rufipogon Griff. from China, was investigated with 21 microsatellite loci and compared to estimates of genetic diversity and genetic differentiation detected by 22 allozyme loci. Microsatellite loci, as expected, have much higher levels of genetic diversity (mean values of A = 3.1, P = 73.3%, Ho = 0.358 and He = 0.345) than allozyme loci (mean values of A = 1.2, P = 12.7%, Ho = 0.020 and He = 0.030). Genetic differentiation detected by microsatellite loci ( FST = 0.468, mean I = 0.472) was higher than that for allozyme loci ( FST =0.388, mean I = 0.976). However, microsatellite markers showed less deviation from Hardy-Weinberg expectation (Wright's inbreeding coefficient FIS = -0.069) than do allozymes ( FIS = 0.337). These results suggest that microsatellite markers are powerful high-resolution tools for the accurate assessment of important parameters in population biology and conservation genetics of O. rufipogon, and offer advantages over allozyme markers.