基于MRI的认知相关的脑宏观-微观结构变化模式研究综述

阿尔茨海默病(AD)是伴有认知功能障碍的神经退行性疾病,其发病机制复杂且至今不明确,一直是国内外医学研究领域的巨大挑战。而结构和扩散磁共振成像技术的发展,为研究AD大脑宏观形态学-微观结构特性病变的机制研究提供重要技术手段。近年来,研究发现,这种宏观和微观结构的异常改变之间具有的内在联系,对于揭示AD等衰老相关疾病的结构病变机理有非常重要的意义。针对该问题,对近几年MRI的大脑宏-微观结构变化模式及相互关系的研究进行分析,对其重要的分析方法和研究结论进行综述,希望有助于今后对大脑宏-微观病变机理的深入开展。     

The impacts of geographic and host species isolation on population divergence of Myxobolus lentisuturalis

Parasitology Research - Samples of Myxobolus lentisuturalis were found in the gallbladder of Carassius auratus in Chongqing, China, without obvious disease symptoms, which were different from...     

Genomic and biological characterization of the Vibrio alginolyticus-infecting “Podoviridae” bacteriophage,vB_ValP_IME271

Virus Genes - As an opportunist pathogen, Vibrio alginolyticus (V. alginolyticus), causes disease in marine animals. Bacterial contamination of seafood is not uncommon, and phage therapy is...     

Micronemal protein 13 contributes to the optimal growth of Toxoplasma gondii under stress conditions

Parasitology Research - Toxoplasma gondii is a ubiquitous parasitic protozoan infecting humans and a wide variety of animals. Fast-replicating tachyzoites during acute infection and slowly growing...     

Gallol‐Tethered Injectable AuNP Hydrogel with Desirable Self‐Healing and Catalytic Properties

Injectable self‐healing hydrogels have drawn growing attention for their extensive applications in biomedical fields. Hydrogels containing nanoparticles also exhibit promising potentials in catalysis, wastewater treatment, and organic synthesis. Inspired by the multifunction of gallol presented herein, a simple one‐pot method to produce a gallol‐tethered gelatin hydrogel via Schiff base under oxidizing conditions using various oxidants is presented. The hydrogels prepared by NaIO₄‐induced cross‐linking present a high self‐healing rate (up to 84.5%), injectable ability, tunable mechanical property, flexible viscoelasticity, and macroporous structure owing to the combination of covalent cross‐linking and supramolecular interactions. HAuCl₄ contributes to the 3D structure formation of the gelatin hydrogel via oxidation cross‐linking. It is reduced by the gallol groups to produce nanogold (AuNP)‐decorated hydrogel (Au‐gel). This Au‐gel is fully characterized by UV–vis, XRD, TEM, SEM, EDX, and ICP‐MS and exhibits a high‐catalytic activity for the reduction of 4‐nitrophenol. The solid Au‐gel catalyst is robust, easily recyclable, and reused at least eight times.     

One‐Step Route to Ladder‐Type C–N Linked Conjugated Polymers

A one‐step synthetic method is demonstrated to construct ladder‐type conjugated polymers without the resource to post‐cyclization procedures. The ladder‐type C–N linked conjugated polymers ( P1 and P2 ) and model compounds ( 1 and 2 ) are achieved in high yields. The obtained model compounds and polymers display desirable solubility in commonly used solvents and high thermal stability, which show a promising application in photoelectric material field.     

Rapamycin attenuates Tc1 and Tc17 cell responses in cigarette smoke-induced emphysema in mice

Inflammation Research - Chronic exposure to cigarette smoke promotes airway inflammation and emphysema accompanied by enhanced CD8+ interferon (IFN)-γ+ T(Tc1) and CD8+ interleukin (IL)-17+...     

MiR-19a mediates the negative regulation of the NF-κB pathway in lipopolysaccharide-induced endometritis by targeting TBK1

Objective

In both humans and animals, endometritis is severe inflammation of the uterus, and it causes great economic losses in dairy cow production. MicroRNAs have been reported to play an important role in various inflammatory diseases. However, the regulatory mechanisms of miR-19a in endometritis remain unclear. Thus, the aims of this study are to investigate the role of miR-19a in a mouse model of lipopolysaccharide (LPS)-induced endometritis and elucidate the possible mechanisms in bovine endometrial epithelial cells (bEECs).

Methods and results

Histological analysis showed that LPS induced severe pathological changes, suggesting that the endometritis mouse model was well established. The qPCR assay indicated that miR-19a expression in the uterine tissues of mice with endometritis and in bEECs with LPS stimulation was significantly reduced. The overexpression of miR-19a significantly decreased the expression of inflammatory cytokines (TNF-α, IL-6 and IL-1β) and the phosphorylation of NF-κB p65 and IκBα. Similar results were also obtained following the knockdown of TBK1. Furthermore, a dual luciferase reporter assay further validated that miR-19a inhibited TBK1 expression by binding directly to the 3′-UTR of TBK1.

Conclusion

We demonstrated that miR-19a has anti-inflammatory effects and mediates the negative regulation of the NF-κB Pathway in LPS-induced endometritis by targeting TBK1.

     

Adoptive transfer of IFN-γ-induced M-MDSCs promotes immune tolerance to allografts through iNOS pathway

Inflammation Research - Efficient production of monocytic myeloid-derived suppressor cells (M-MDSCs) with stable immunosuppressive function is crucial for immunomodulatory cell therapy for many...     

男性乳癌31例临床分析

目的探讨男性乳癌的诊断和综合治疗方法.方法对1985年10月～1999年9月收治的31例男性乳癌患者的临床资料进行回顾性分析总结.结果随访至2004年9月,2例局部复发,8例出现远处转移.5年生存率71.0%(22/31).结论男性乳癌是一种少见的恶性肿瘤.诊断主要依靠术后病理,淋巴结转移是主要的预后因素.综合治疗可能有助于提高生存率.