Simultaneously quantifying hundreds of acylcarnitines in multiple biological matrices within ten minutes using ultrahigh-performance liquid-chromatography and tandem mass spectrometry.

Acylcarnitines are metabolic intermediates of fatty acids and branched-chain amino acids having vital biofunctions and pathophysiological significances. Here, we developed a high-throughput method for quantifying hundreds of acylcarnitines in one run using ultrahigh performance liquid chromatography and tandem mass spectrometry (UPLC-MS/MS). This enabled simultaneous quantification of 1136 acylcarnitines (C0-C26) within 10-min with good sensitivity (limit of detection < 0.7 fmol), linearity (correlation coefficient > 0.992), accuracy (relative error < 20%), precision (coefficient of variation (CV), CV < 15%), stability (CV < 15%), and inter-technician consistency (CV < 20%, n = 6). We also established a quantitative structure-retention relationship (goodness of fit > 0.998) for predicting retention time (tR) of acylcarnitines with no standards and built a database of their multiple reaction monitoring parameters (tR, ion-pairs, and collision energy). Furthermore, we quantified 514 acylcarnitines in human plasma and urine, mouse kidney, liver, heart, lung, and muscle. This provides a rapid method for quantifying acylcarnitines in multiple biological matrices.

Dietary supplementation of two indigenous Bacillus spp on the intestinal morphology, intestinal immune barrier and intestinal microbial diversity of Rhynchocypris lagowskii.

This study evaluated the effects of dietary administration of two indigenous Bacillus (A: basal control diet; B: 0.15 g/kg of Bacillus subtilis; C: 0.1 g/kg of Bacillus subtilis and 0.05 g/kg of Bacillus licheniformis; D: 0.05 g/kg of Bacillus subtilis and 0.1 g/kg of Bacillus licheniformis; E: 0.15 g/kg of Bacillus licheniformis) on the digestive enzyme activities, intestinal morphology, intestinal immune and barrier-related genes relative expression levels, and intestinal flora of Rhynchocypris lagowskii. The results showed that the fold height, lamina propria width, and muscle layer thickness of midgut and hindgut in group C were significantly higher than that of group A (P < 0.05). The activities of protease, amylase, and lipase in group C were significantly higher than those of group A (P < 0.05). The relative expression levels of IL-1ß and IL-8 in the intestine of group C were significantly downregulated, and the relative expression levels of IL-10 and TGF-ß were significantly upregulated (P < 0.05). The relative expression levels of Claudin-2 in group A significantly increased and the relative expression levels of Claudin-4 in group A significantly reduced compared with other groups (P < 0.05). The relative expression levels of ZO-1 in groups C and D were significantly higher than those of other groups (P < 0.05). The Bacillus in the intestine of group C has the highest relative abundance among all groups. Overall, it can generally be concluded that dietary supplementation of indigenous Bacillus subtilis and Bacillus licheniformis (group C) can improve the intestinal morphology, digestion, and absorption enzyme activities, enhance intestinal mucosal immunity and barrier function, and maintain the intestinal microbial balance of R. lagowskii.

Research Progress on Risk Factors of Brain Metastasis in Non-small Cell Lung Cancer / 中国肺癌杂志

Brain metastasis of non-small cell lung cancer (NSCLC) is a common treatment failure mode, and the median survival time of NSCLC patients with brain metastasis is only 1 mon-2 mon. Prophylactic cranial irradiation (PCI) can delay the occurrence of brain metastasis, but the survival benefits of NSCLC patients are still controversial. It is particularly important to identify the patients who are most likely to benefit from PCI. This article reviews the high risk factors of brain metastasis in NSCLC.
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Active surveillance and response evaluation strategy after neoadjuvant therapy for esophageal cancer / 中华放射肿瘤学杂志

A considerable proportion of esophageal carcinoma patients could achieve pathological complete response (pCR) after neoadjuvant therapy, for whom accurate response evaluation and active surveillance rather than surgery-aiming to avoid the complications, mortality and reduced quality of life after surgery-has become a research hotspot. To detect residual disease and predict pCR accurately by appropriate method(s) is the key of active surveillance strategy. In this article, we elaborated the active surveillance strategy of esophageal cancer and characteristics of different evaluation methods in terms of radiology, pathology and combined detection.

Establishment and identification of C57BL/6 mouse model with radiation-induced pulmonary fibrosis / 中华放射肿瘤学杂志

Objective:To establish the mouse model with radiation-induced pulmonary fibrosis, and to identify and analyze it from the aspects of function, imaging and pathology.Methods:Thirty C57BL/6 mice were randomly divided into the control group, 16 Gy irradiation group and 20Gy irradiation group. The mice in the irradiation groups received a single 16 Gy or 20 Gy chest X-ray irradiation, and underwent functional examination, imaging examination and pathological examination at 3 and 6 months after irradiation.Results:At 6 months after irradiation, hair on the chest and back of the mice turned white and fell off, and the airway resistance was increased significantly. CT images showed extensive patch shadows and consolidation in the lung. Three dimensional reconstruction suggested that the lung of mice was distorted and deformed, and the volume was decreased significantly. Pathological examination confirmed that there was extensive pulmonary fibrosis.Conclusions:Significant pulmonary fibrosis occurs after 6 months of chest irradiation in mice. The animal model of radiation-induced pulmonary fibrosis in C57BL/6 mice was successfully established.

Research progress onneoadjuvant therapy in stage ⅢA-N2 non-small cell lung cancer / 中华放射肿瘤学杂志

Ⅲ A-N2 NSCLC is a group of heterogeneous diseases.The optimal treatment modality remains controversial.How to choose suitable neoadjuvant treatment modalities including chemotherapy,radiotherapy,target therapy and immunotherapy remains unclear.In this article,research progress on neoadjuvant therapy of NSCLC was reviewed to evaluate the efficacy and safety for different modalities.

Consensus and disputes on the adjuvant therapy for non-small cell lung cancer with positive surgical margins / 中华放射肿瘤学杂志

For non-small cell lung cancer (NSCLC) patients with positive surgical margins, the survival rates can be dramatically decreased. However, high-level evidence is lacking in the standard adjuvant treatment for NSCLC patients with positive surgical margins. In this article, consensus and disputes on the adjuvant therapy for NSCLC patients with positive surgical margins were reviewed.

Research progress onneoadjuvant therapy in stage ⅢA-N2 non-small cell lung cancer / 中华放射肿瘤学杂志

ⅢA-N2 NSCLC is a group of heterogeneous diseases. The optimal treatment modality remains controversial. How to choose suitable neoadjuvant treatment modalities including chemotherapy, radiotherapy, target therapy and immunotherapy remains unclear. In this article, research progress on neoadjuvant therapy of NSCLC was reviewed to evaluate the efficacy and safety for different modalities.

Progress in adjuvant therapy decision-making after endoscopic resection of early esophageal cancer / 中华放射肿瘤学杂志

Both endoscopic resection and surgery are the common treatment modes for early esophageal cancer. Compared with radical surgery, endoscopic resection has the advantages of less trauma, quicker recovery, lower cost, less complications, the preservation of the normal anatomy, the physiological function of the esophagus, and higher postoperative quality of life. For patients with a high risk of lymph node metastasis, endoscopic resection alone can lead to inadequate treatment, which need adjuvant therapies. Currently, the common adjuvant therapies consist of adjuvant radiochemotherapy and adjuvant radiochemotherapy combined with surgery. How to combine endoscopic resection with adjuvant therapy to bring maximal benefits to patients has become the hot topic in the field of clinical researches. In this article, the current research status, progress and challenges in the combination of endoscopic resection and adjuvant therapy for the treatment of high-risk patients were reviewed.

Research progress in radiotherapy combined with immunotherapy for non-small cell lung cancer / 中华放射肿瘤学杂志

Radiotherapy is the common traditional treatment for non-small cell lung cancer (NSCLC).In recent years,remarkable advances have been made in immunotherapy,especially the use of immune checkpoint inhibitors.How to effectively combine radiotherapy and immunotherapy to maximize the benefit for patients has become a hot topic in clinical research.This article expounds recent research progress in immunotherapy for NSCLC,the effect of radiotherapy on tumor immunology,and the advances and challenges in radiotherapy combined with immunotherapy for NSCLC.

Application mechanisms of radiotherapy combined with immune checkpoint inhibitors / 中华放射肿瘤学杂志

Remarkable advances have been made in immunotherapy,especially immune checkpoint inhibitors.However,only less than 30％ patients would respond to single checkpoint inhibitors.Radiotherapy can augment the anti-tumor immune responses elicited by immunotherapy,either by way of synergy or complementation.This article reviews the mechanisms,the advances and challenges in combination therapy.

Reprogramming of Seed Metabolism Facilitates Pre-harvest Sprouting Resistance of Wheat.

Pre-harvest sprouting (PHS) is a worldwide problem for wheat production and transgene antisense-thioredoxin-s (anti-trx-s) facilitates outstanding resistance. To understand the molecular details of PHS resistance, we analyzed the metabonomes of the transgenic and wild-type (control) wheat seeds at various stages using NMR and GC-FID/MS. 60 metabolites were dominant in these seeds including sugars, organic acids, amino acids, choline metabolites and fatty acids. At day-20 post-anthesis, only malate level in transgenic wheat differed significantly from that in controls whereas at day-30 post-anthesis, levels of amino acids and sucrose were significantly different between these two groups. For mature seeds, most metabolites in glycolysis, TCA cycle, choline metabolism, biosynthesis of proteins, nucleotides and fatty acids had significantly lower levels in transgenic seeds than in controls. After 30-days post-harvest ripening, most metabolites in transgenic seeds had higher levels than in controls including amino acids, sugars, organic acids, fatty acids, choline metabolites and NAD(+). These indicated that anti-trx-s lowered overall metabolic activities of mature seeds eliminating pre-harvest sprouting potential. Post-harvest ripening reactivated the metabolic activities of transgenic seeds to restore their germination vigor. These findings provided essential molecular phenomic information for PHS resistance of anti-trx-s and a credible strategy for future developing PHS resistant crops.

Clinicopathological characteristics, diagnosis and treatment of combined small cell lung cancer / 国际肿瘤学杂志

Combined small cell lung cancer (C-SCLC) is a special subtype of small cell lung cancer (SCLC),which has a low incidence and diagnostic rate.However,the incidence and diagnostic rate appear an increasing tendency recently.The clinical features of C-SCLC are similar to the pure SCLC,while it has a relatively limited stage.The main treatment pattern of C-SCLC is multimodality therapy,though the response to chemotherapy in C-SCLC is relatively poor.Survival between patients with C-SCLC versus SCLC is similar.KPS,stage,composite components,tumor location and diameter,surgery margin are prognostic factors.Radiotherapy can benefit for the patients with ⅢA/ⅢB disease,positive lymph nodes,or with more metastatic lymph nodes after surgery.

Attention networks in patients with Parkinson' s disease / 中华神经科杂志

Objective To investigate the characteristics of attention networks impairment in Parkinson' s disease patients.Methods Attention network test was performed in 28 PD patients and 28 normal controls on the efficiency of three anatomically defined attentional networks:alerting,orienting,and executive control.Results The correct rate of attention network test was significantly lower(P0.05).The relative analysis showed that the Hoehn Yahr stage was positively correlated with the value of executive netwok(r=0.794,P