Eukaryotic cytochrome P450 enzymes, generally colocalizing with their redox partner cytochrome P450 reductase (CPR) on the cytoplasmic surface of organelle membranes, often perform poorly in prokaryotic cells, whether expressed with CPR as a tandem chimera or free-floating individuals, causing a low titer of heterologous chemicals. To improve their biosynthetic performance in Escherichia coli, here, we architecturally design self-assembled alternatives of eukaryotic P450 system using reconstructed P450 and CPR, and create a set of N-termini-bridged P450-CPR heterodimers as the counterparts of eukaryotic P450 system with N-terminus-guided colocalization. The covalent counterparts show superior and robust biosynthetic performance, and the N-termini-bridged architecture is validated to improve the biosynthetic performance of both plant and human P450 systems.
View Article and Find Full Text PDFPurpose: To investigate the prevalence of Y chromosome polymorphisms in Chinese men and analyze their associations with male infertility and female adverse pregnancy outcomes.
Methods: The clinical data of 32,055 Chinese men who underwent karyotype analysis from October 2014 to September 2019 were collected. Fisher's exact test, chi-square test, or Kruskal-Wallis test was used to analyze the effects of Y chromosome polymorphism on semen parameters, azoospermia factor (AZF) microdeletions, and female adverse pregnancy outcomes.
Purpose: To establish a medically valuable normal reference interval of follicle-stimulating hormone (FSH) levels in males with normal semen and to assess the predictive value of FSH in males exhibiting semen abnormalities.
Methods: The study involved male patients who underwent their initial serum sex hormone test and semen test between October 2013 and June 2023. The reference interval was identified as the 95% confidence interval (CI) of FSH values in the patients with normal semen parameters.
Background And Aims: There are currently no clear conclusions about whether major depression (MD) and bipolar disorder (BD) increase the risk of erectile dysfunction (ED). In our study, we used a Mendelian randomization (MR) analysis to discover the causal associations between MD, BD and ED.
Methods: We got single-nucleotide polymorphisms (SNPs) related to MD, BD and ED from the MRC IEU Open genome-wide association study (GWAS) datasets.
Background: As the survival rates of patients with renal cell carcinoma (RCC) continue to increase, noncancer causes of death cannot be ignored. The cause-specific mortality in patients with RCC is not well understood.
Objective: Our study aimed to explore the mortality patterns of contemporary RCC survivors.
Zhonghua Nan Ke Xue
December 2021
Background And Aims: There is a lack of research on metastatic renal pelvis cell carcinoma in the current literature. In this study, we aimed to detect distant metastatic patterns in renal pelvis cell carcinoma, and illustrated the affection of different metastatic sites, surgery to primary site and chemotherapy on prognosis outcomes in patients with diverse conditions.
Methods: We collected data between 2010 and 2015 from the Surveillance, Epidemiology and End Results database.
Purpose: to describe the methodology of transurethral seminal vesiculoscopy and the anatomy of the area of the verumontanum, and to determine the safety of this procedure, especially in terms of postoperative complications.
Methods: This retrospective observational study enrolled 144 patients with intractable hematospermia from May 2011 and August 2019. A 4.
Background: Controversial effectiveness of chemotherapy and still poor prognosis prompt us to find better treatment options. This study targeted at investigating whether adding radiotherapy based on chemotherapy can effectively improve the prognosis of patients, especially for advanced penile cancer.
Methods: Data were obtained from the Surveillance, Epidemiology, and End Results database (SEER*Stat software V.
This study analyzed the trend in semen quality of infertile male patients in Wenzhou, China, based on the data obtained from 38 905 patients during 2008-2016 in The First Affiliated Hospital of Wenzhou Medical University (Wenzhou, China). The results showed that only 24.9% of the patients had normal semen quality.
View Article and Find Full Text PDFZhonghua Nan Ke Xue
November 2020
With the continuous improvement of living conditions, increasing attention is being drawn to the genitourinary health of males, which has boomed the development of uroandrology in recent years. Refractory hemospermia, infertility, and perineal pain are commonly seen in some male patients, and mainly relied on medical imaging for diagnosis in the past, which, however, has a high pseudopositive rate and cannot give an etiological explanation. Patients with these diseases often adopt conservative treatments such as medication and physiotherapy, often with poor prognosis, and those suffering frequent recurrence used to be treated by transurethral resection, laparoscopic surgery or open surgery, which are now rarely employed due to their high rate of postoperative complications, slow recovery, and easy recurrence.
View Article and Find Full Text PDFBackground: To develop a nomogram for predicting cancer-specific survival (CSS) of patients with non-metastatic primary adenocarcinoma of the bladder (NMACB).
Methods: We used a retrospective cohort study design. Patient data were obtained from the SEER database, univariate and multivariate Cox regression analyses were performed to identify factors associated with CSS.
Background: To develop a nomogram to predict cancer-specific survival (CSS) in patients with metastatic testicular germ cell tumors (mTGCTs).
Methods: Data were obtained from the Surveillance, Epidemiology, and End Results database. Univariate and multivariate Cox regression models were used to identify factors associated with CSS.
Lycoris radiata is a main source of Amaryllidaceae alkaloids; however, the low content of these alkaloids in planta remains a limit to their pharmaceutical development and utilization. The accumulation of secondary metabolites can be enhanced in plants inoculated with fungal endophytes. In this study, we analysed the diversity of culturable fungal endophytes in different organs of L.
View Article and Find Full Text PDFThis network meta-analysis was conducted to compare the efficacy and adverse effects of several treatments for advanced/metastatic prostate cancer (PC). The PubMed and Cochrane Library databases were searched for randomized controlled trials of treatments for advanced/metastatic PC. Eighteen studies covering 6,340 patients were included in this analysis.
View Article and Find Full Text PDFBackground/aims: This study investigated whether microRNA-214 (miR-214) targets mitofusin-2 (Mfn2) in the process of fibroblast differentiation of adipose-derived mesenchymal stem cells (ADMSCs) during pelvic floor dysfunction (PFD) in Sprague Dawley (SD) rats with birth trauma.
Methods: The ADMSCs were isolated from 4-6 week male SD rats (n = 20) and were cultured and divided into the blank, miR-214 mimic negative control (NC), miR-214 mimic, miR-214 inhibitor NC, miR-214 inhibitor, empty vector, Mfn2 over-expression and miR-214 + Mfn2 over-expression groups. Fibroblast differentiation of ADMSCs was measured with immunocytochemistry and immunofluorescence methods.
Guang Pu Xue Yu Guang Pu Fen Xi
March 2016
The basic principle of polarization-differentiation elastic light scattering spectroscopy based techniques is that under the linear polarized light incidence, the singlely scattered light from the superficial biological tissue and diffusively scattered light from the deep tissue can be separated according to the difference of polarization characteristics. The novel point of the paper is to apply this method to the detection of particle suspension and, to realize the simultaneous measurement of its particle size and number density in its natural status. We design and build a coaxial cage optical system, and measure the backscatter signal at a specified angle from a polystyrene microsphere suspension.
View Article and Find Full Text PDFObjective: To study the chemical constituents of Callicarpa nudiflora.
Methods: The chemical constituents were isolated and purified by column chromatography on silica gel, ODS, Sephadex LH-20 and MPLC. Their structures were elucidated on the basis of physicochemical properties and special analysis.
Two new iridoid glucosides, callicoside A (1) and callicoside B (2), were isolated from the leaves of Callicarpa nudiflora. Their structures were elucidated by means of spectroscopic methods and chemical evidences. In an in vitro bioassay, compound 1 showed pronounced hepatoprotective activity against D-galactosamine-induced toxicity in WB-F344 rat hepatic epithelial stem-like cells.
View Article and Find Full Text PDFZhongguo Zhong Yao Za Zhi
May 2015
This study is to establish the HPLC fingerprint and determine eight components of Callicarpa nudiflora, and provide a scientific basis for the identification and quality control. The Waters sunfire C18 column (4.6 mm x 250 mm, 5 µm) was used and the detection wavelength was 330 nm .
View Article and Find Full Text PDFZhongguo Zhong Yao Za Zhi
March 2015
To investigate the metabolic rate and metabolites of 9-dehydro-17-dehydro-andrographolide, which is the main active ingredient in Xiyanping injection, by using the in vitro rat liver microsome incubation system. 9-dehydro-17-dehydro-andrographolide was incubated together with liver microsome mixed with NADPH. Its metabolic rate was studied by determining its residual concentrations with the UHPLC-MS/MS method; Its metabolites were identified by the UPLC-TOF-MS(E) method.
View Article and Find Full Text PDFChem Pharm Bull (Tokyo)
February 2015
Four new triterpenoid saponins, 2α,3α,19α,24-tetrahydroxyolean-12-en-28-oic-acid 28-O-β-D-glucopyranosyl ester (1), 2α,3α,19α,23-tetrahydroxyolean-12-en-28-oic-acid 28-O-β-D-xylopyranosyl-(1→2)-β-D-glu-copyranosyl ester (2), 2α,3α,19α-trihydroxyolean-12-en-28-oic-acid 28-O-β-D-xylopyranosyl-(1→2)-β-D-glucopyranosyl ester (3), 2α,3α,23,29-tetrahydroxyurs-12,19-dien-28-oic-acid 28-O-β-D-glucopyranosyl ester (4), together with three known compounds (5-7), were isolated from the leaves of Callicarpa nudiflora HOOK. Their structures were established by means of spectroscopic methods and chemical evidence. Hepatoprotective activities of the isolated compounds against D-galactosamine-induced toxicity have been tested.
View Article and Find Full Text PDFFollicular atresia is common in female mammalian ovaries, where most follicles undergo degeneration at any stage of growth and development. Oxidative stress gives rise to triggering granulosa cell apoptosis, which has been suggested as a major cause of follicular atresia. However, the underlying mechanism by which the oxidative stress induces follicular atresia remains unclear.
View Article and Find Full Text PDFDNA structural variation (SV) comprises a major portion of genetic diversity, but its biological impact is unclear. We propose that the genetic history and extraordinary phenotypic variation of dogs make them an ideal mammal in which to study the effects of SV on biology and disease. The hundreds of existing dog breeds were created by selection of extreme morphological and behavioral traits.
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