Autophagy Alleviates Cold Exposure-induced Tight Junction Injury in Murine Ileum

Cold exposure is a pervasive stressor in the polar and subpolar regions,exerting both acute and chronic effects on individuals.This environmental factor is known to induce physiological stress,compromise immune response efficacy,and increase susceptibility to various diseases.Chronic cold exposure,characterized by repetitive nonconsecutive exposure to suboptimal temperatures over an extended duration.

Degradation Behavior of Zn-Cu Stents with Different Coatings in Sodium Chloride Solution

The Zn0.6Cu wires are fabricated into stents for the potential biodegradable application of nasal wound healing.The degradation behavior of Zn0.6Cu stents in 0.9 wt%NaCl at 36.5℃ is evaluated.It shows that the untreated Zn0.6Cu stent experiences severe crevice corrosion with acceleration and autocatalytic effects within the micro-cracks and ruptures at 4.67±1.15 d,with the average corrosion rate of 0.28 mm y^(-1).Fortunately,the anodic polarization(AP)+hydrothermal(H)conversion coating,consisting of ZnCO_(3),Zn(OH)_(2) and ZnO,could inhibit the crevice corrosion significantly by reducing the cathode/anode ratio,extending the rupture time up to 16.50±2.95 d,with the average corrosion rate of 0.14 mm y^(-1).This research indicates that the biodegradable Zn-based stent has some potential applications in nasal wound recovery area.

Progress in the biological function of alpha-enolase

Alpha-enolase(ENO1), also known as 2-phospho-D-glycerate hydrolase, is a metalloenzyme that catalyzes the conversion of 2-phosphoglyceric acid to phosphoenolpyruvic acid in the glycolytic pathway. It is a multifunctional glycolytic enzyme involved in cellular stress, bacterial and fungal infections, autoantigen activities, the occurrence and metastasis of cancer, parasitic infections, and the growth, development and reproduction of organisms. This article mainly reviews the basic characteristics and biological functions of ENO1.

Radioiodinated tyrosine based carbon dots with efficient renal clearance for single photon emission computed tomography of tumor

Nan oparticles with effective tumor accumulation and efficient renal clearance have attracted significant interests for clinical applications.Weprepared 2.5 nm tyrosine based carbon dots(TCDs)with phenolic hydroxyl groups on the surface for directly 125I labeling.The 125I labeledpolyethylene glycol(PEG)functionalized TCDs(125I-TCDPEGs)showed excellent radiochemical stability both in vitro and in vivo.Due to theenhanced permeability and retentio n effect,these 125I-TCDPEGs demonstrated a tumor accumulatio n around 4%-5%of the injected doseper gram(ID/g)for U87MG,4T1,HepG2 and MCF7 tumor-bearing mice at 1 h post-injection.Meanwhile,the 125I-TCDPEGs also could befast renally excreted,with less than 0.6%ID/g left in the liver and spleen within 24 h.These radioactive carb on dots not only can be used forcellular fluorescence imaging due to their intrinsic optical property,but are also effective single photon emission computed tomography(SPECT)imaging agents for tumor.Together with their excellent biocompatibility and stability,we anticipate these 125I-TCDPEGs of great potential for earlytumor diagnosis in clinic.Whafs more,our TCDPEGs are also proved to be feasible carriers for other iodine isotopes such as 127I and 131I fordifferent biomedical application.

Integrated metabolism and epigenetic modifications in the macrophages of mice in responses to cold stress

The negative effects of low temperature can readily induce a variety of diseases.We sought to understand the reasons why cold stress induces disease by studying the mechanisms of fine-tuning in macrophages following cold exposure.We found that cold stress triggers increased macrophage activation accompanied by metabolic reprogramming of aerobic glycolysis.The discovery,by genome-wide RNA sequencing,of defective mitochondria in mice macrophages following cold exposure indicated that mitochondrial defects may contribute to this process.In addition,changes in metabolism drive the differentiation of macrophages by affecting histone modifications.Finally,we showed that histone acetylation and lactylation are modulators of macrophage differentiation following cold exposure.Collectively,metabolism-related epigenetic modifications are essential for the differentiation of macrophages in cold-stressed mice,and the regulation of metabolism may be crucial for alleviating the harm induced by cold stress.