CiRS-7 Enhances the Liquid-liquid Phase Separation of miRISC and Promotes DNA Damage Repair.

Noncoding RNAs have been found to play important roles in DNA damage repair, whereas the participation of circRNA remains undisclosed. Here, we characterized ciRS-7, a circRNA containing over 70 putative miR-7-binding sites, as an enhancer of miRISC condensation and DNA repair. Both and experiments confirmed the condensation of TNRC6B and AGO2, two core protein components of human miRISC.

Diagnosis and Treatment Strategy of Nasogenic Olfactory Dysfunction.

Since the global outbreak of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), a symptom of the onset of SARS-CoV-2, olfactory dysfunction (OD), has attracted tremendous attention. OD is not only a negative factor for quality of life but also an independent hazard and early biomarker for various diseases, such as Parkinson's and Huntington's diseases. Therefore, early identification and treatment of OD in patients are critical.

Trijugin- and mexicanolide-type limonoids from the fruits of Heynea trijuga that reverse multidrug resistance in MCF-7/DOX cells.

Eleven previously undescribed limonoids, trichisins A-K, including eight structural analogues A-H of trijugin and three H-J mexicanolide derivatives, together with two known mexicanolide derivatives were isolated from the fruits of Heynea trijuga Roxb. ex Sims. The structure determination was based on extensive physical data analyses (NMR, MS), and their basic skeletons and the absolute configurations of trichisins A, B, E, K and trichiconnarone A were assigned via X-ray crystallographic analysis (Cu Kα radiation).

Reversal of multidrug resistance by icaritin in doxorubicin-resistant human osteosarcoma cells.

Multidrug resistance (MDR) is one of the major obstacles in cancer chemotherapy. Our previous study has shown that icariin could reverse MDR in MG-63 doxorubicin-resistant (MG-63/DOX) cells. It is reported that icariin is usually metabolized to icariside II and icaritin.

Involucratusins A-H: Unusual Cadinane Dimers from Stahlianthus involucratus with Multidrug Resistance Reversal Activity.

Three novel cadinane dimers, involucratusins A-C (1-3), five unique nor-cadinane-dimers, involucratusins D-H (4-8), together with a known compound (9) were isolated from the rhizomes of Stahlianthus involucratus. Their challenging structures and absolute configurations were determined by spectroscopic data, CD experimentation, chemical conversions and single-crystal X-ray diffraction. Compounds 1-3 are unusual cadinane dimers with new connection and novel cores.

Meglumine: A novel and efficient catalyst for one-pot, three-component combinatorial synthesis of functionalized 2-amino-4H-pyrans.

An efficient one-pot synthesis of functionalized 2-amino-4H-pyrans by a meglumine-catalyzed three-component reaction has been developed. A broad range of substrates including aromatic and heteroaromatic aldehydes, isatin derivatives, and acenaphthenequinone are condensed with enolizable C-H activated compounds and alkylmalonates to give the desired products in high to excellent yields. This methodology provides an alternative approach for rapid access to construct a diversity-oriented library of 4H-pyrans.

D-penicillamine assisted hydrothermal synthesis of Bi2S3 nanoflowers and their electrochemical application.

Single crystalline flower-like Bi2S3 nanostructures were successfully synthesized via a simple, facile and green hydrothermal method, with the assistance of D-penicillamine. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), and found their morphologies mainly depend on the ratios of Bi(3+) to D-penicillamine, as well as the reaction temperature and time. And the possible growth mechanism has been discussed in some detail.

Construction of the yeast whole-cell Rhizopus oryzae lipase biocatalyst with high activity.

Surface display is effectively utilized to construct a whole-cell biocatalyst. Codon optimization has been proven to be effective in maximizing production of heterologous proteins in yeast. Here, the cDNA sequence of Rhizopus oryzae lipase (ROL) was optimized and synthesized according to the codon bias of Saccharomyces cerevisiae, and based on the Saccharomyces cerevisiae cell surface display system with α-agglutinin as an anchor, recombinant yeast displaying fully codon-optimized ROL with high activity was successfully constructed.

Effect of celecoxib on proliferation, apoptosis, and survivin expression in human glioma cell line U251.

Background And Objective: Celecoxib, one of the new generation of non-steroidal anti-inflammatory drugs (NSAIDs), has a specific inhibitory effect on COX-2. Studies have shown that celecoxib can inhibit the proliferation of tumor cells and induce cell apoptosis, which has been confirmed in colorectal tumors and familial adenomatous polyposis. This study explored the effect of celecoxib on the proliferation and apoptosis of human glioma cell line U251 and elucidated the correlation between the effect of celecoxib and the expression of survivin.

Correlation of ¹⁸F-FDG PET activity with expressions of survivin, Ki67, and CD34 in non-small-cell lung cancer.

Purpose: This work investigates the correlation between positron emission tomography (PET) images and the expressions of survivin, Ki67, and CD34, as well as the clinicopathological characteristics of non-small-cell lung cancer (NSCLC).

Methods: Thirty-three NSCLC cases were scanned with ¹⁸F-fluorodeoxyglucose (¹⁸F-FDG), PET before surgery. Tumor resections were used to evaluate the expressions of survivin, Ki67, and CD34 by immunohistochemical assay.

[Effectiveness and safety of intragastric balloon for treatment of morbid obesity].

Objective: To evaluate the effectiveness and safety of intragastric balloon (IGB) for the treatment of obese Chinese.

Methods: IGB was placed into the stomachs of 48 Chinese patients in Hong Kong, 13 males and 35 females; aged 39 +/- 9 (18 - 65), with the mean baseline body weight (BW) of 106 +/- 26 kg and mean body mass index (BMI) of (40 +/- 9) kg/m(2), 34 (70.8%) with coexistent obesity-related morbidities, who failed to respond to other weight reducing treatment, via routine gastroscopy under intravenous conscious sedation.

A new picfeltarraenone glycoside from Picria fel-terrae.

Aim: To investigate the chemical constituents from Picria fel-terrae Lour.

Methods: Column chromatography techniques were used to isolate the chemical constituents, physico-chemical constants and spectroscopic analysis were employed for structural elucidation. Results Two triterpenoids named picfeltarraenone I (1) and picfeltarraenin XI (2) were isolated, and their structures were established to be 3,11,22-trioxo-16alpha-hydroxy-(20S,24)-epoxy-cucurbit-5,23-diene (1) and 3,11,22-trioxo-16alpha-hydroxy-(20S,24)-epoxy-cucurbit-5, 23-diene-2beta-O-beta-D-glucopyranoside (2), respectively.

Clinical and dosimetric factors of radiation-induced esophageal injury: radiation-induced esophageal toxicity.

Aim: To analyze the clinical and dosimetric predictive factors for radiation-induced esophageal injury in patients with non-small-cell lung cancer (NSCLC) during three-dimensional conformal radiotherapy (3D-CRT).

Methods: We retrospectively analyzed 208 consecutive patients (146 men and 62 women) with NSCLC treated with 3D-CRT. The median age of the patients was 64 years (range 35-87 years).