Objective Tissue uptake and distribution of nano-/microplastics was studied at a single high dose by gavage in vivo.Methods Fluorescent microspheres (100 nm, 3 μm, and 10 μm) were given once at a dose of 200 mg/(kg·body weight). The fluorescence intensity (FI) in observed organs was measured using the IVIS Spectrum at 0.5, 1, 2, and 4 h after administration. Histopathology was performed to corroborate these findings.Results In the 100 nm group, the FI of the stomach and small intestine were highest at 0.5 h, and the FI of the large intestine, excrement, lung, kidney, liver, and skeletal muscles were highest at 4 h compared with the control group (P < 0.05). In the 3 μm group, the FI only increased in the lung at 2 h (P < 0.05). In the 10 μm group, the FI increased in the large intestine and excrement at 2 h, and in the kidney at 4 h (P < 0.05). The presence of nano-/microplastics in tissues was further verified by histopathology. The peak time of nanoplastic absorption in blood was confirmed.Conclusion Nanoplastics translocated rapidly to observed organs/tissues through blood circulation;however, only small amounts of MPs could penetrate the organs.

Objective To investigate the activated phenotype and the expression of the receptor of advanced glycation endproducts(RAGE)of astrocytes after hypoxic-ischemic brain damage(HIBD)in neonatal rats and the effects of gastrodin(GAS)intervention on them.Methods Totally 48 neonatal 3 days SD rats were used to construct HIBD model and randomly divided into sham group,HIBD group and HIBD+GAS group(100 mg/kg),and the expressions of Al type astrocyte marker C3,A2 type astrocyte marker S100A10,RAGE,tumor necrosis factor-α(TNF-α),brain-derived neurotrophic factor(BDNF),and insulin-like growth factor(IGF-1)in the corpus callosum of the ischemic side were detected by Western blotting and immunohistochemical staining on day 1 and day 3 after HIBD.TNC-1 cells were divided into control group,oxygen glucose deprivation(OGD)group,OGD+GAS(0.34 mmol/L)group and GAS group,and then the protein expressions of RAGE,TNF-α,BDNF and IGF-1 were detected by Western blotting and immunofluorescence.Results In vivo,Western blotting showed that compared with the sham group,the protein expression levels of C3,S100A10,RAGE,TNF-α and IGF-1 in the 1 day and 3 days groups after HIBD group in 1 day group were significantly higher than those in the sham group(P＜0.05),but the protein expression level of BDNF decreased in 1 day group and increased in 3 days group(P＜0.05).Compared with the HIBD group,the C3,RAGE and TNF-α protein expression levels were significantly attenuated in the HIBD+GAS group(P＜0.05),and the protein expression levels of BDNF and IGF-1 further increased(P＜0.05).The protein expression of S100A10 in the 3 days group was higher than that in the HIBD group after GAS treatment(P＜0.05).The immunohistochemical staining results of C3,S100A10,and RAGE in the 1 day and 3 days groups after HIBD were consistent with Western blotting results.Furthermore,the protein expressions of RAGE and TNF-α were significantly enhanced in OGD-stimulated astrocytes(P＜0.05).After GAS intervention,while the expressions of both RAGE and TNF-α decreased significantly(P＜0.05),the expressions of BDNF and IGF-1 increased significantly(P＜0.05).Conclusion With inhibiting the up-regulation of RAGE signal in astrocyte after HIBD and expressions of A1 astrocyte and neuroinflammatory factors,gastrodin can promot the expressions of A2 astrocyte and nutritional factors,which play an important role in neuro-protective effect.

The twenty-first century has already recorded more than ten major epidemics or pandemics of viral disease, including the devastating COVID-19. Novel effective antivirals with broad-spectrum coverage are urgently needed. Herein, we reported a novel broad-spectrum antiviral compound PAC5. Oral administration of PAC5 eliminated HBV cccDNA and reduced the large antigen load in distinct mouse models of HBV infection. Strikingly, oral administration of PAC5 in a hamster model of SARS-CoV-2 omicron (BA.1) infection significantly decreases viral loads and attenuates lung inflammation. Mechanistically, PAC5 binds to a pocket near Asp49 in the RNA recognition motif of hnRNPA2B1. PAC5-bound hnRNPA2B1 is extensively activated and translocated to the cytoplasm where it initiates the TBK1-IRF3 pathway, leading to the production of type I IFNs with antiviral activity. Our results indicate that PAC5 is a novel small-molecule agonist of hnRNPA2B1, which may have a role in dealing with emerging infectious diseases now and in the future.
Animals ; Mice ; Antiviral Agents/pharmacology* ; COVID-19 ; Hepatitis B virus ; Interferon Type I/metabolism* ; SARS-CoV-2/drug effects* ; Heterogeneous-Nuclear Ribonucleoprotein Group A-B/antagonists & inhibitors*

OBJECTIVE: This study was designed to provide the evidences on the toxicokinetics of microplastics (MPs) and nanoplastics (NPs) in the bodies of mammals. METHODS: 100 nm, 3 μm, and 10 μm fluorescent polystyrene (PS) beads were administered to mice once by gavage at a dose of 200 mg/kg body weight. The levels and change of fluorescence intensity in samples of blood, subcutaneous fat, perirenal fat, peritesticular fat, cerebrum, cerebellum, testis, and epididymis were measured at 0.5, 1, 2, and 4 h after administration using an IVIS Spectrum small-animal imaging system. Histological examination, confocal laser scanning, and transmission electron microscope were performed to corroborate the findings. RESULTS: After confirming fluorescent dye leaching and impact of pH value, increased levels of fluorescence intensity in blood, all adipose tissues examined, cerebrum, cerebellum, and testis were measured in the 100 nm group, but not in the 3 and 10 μm groups except in the cerebellum and testis at 4 h for the 3 μm PS beads. The presence of PS beads was further corroborated. CONCLUSION After a single oral exposure, NPs are absorbed rapidly in the blood, accumulate in adipose tissues, and penetrate the blood-brain/testis barriers. As expected, the toxicokinetics of MPs is significantly size-dependent in mammals.
Male ; Animals ; Mice ; Microplastics ; Plastics ; Genitalia ; Adipose Tissue ; Polystyrenes/toxicity* ; Nerve Tissue ; Mammals

The plant root-associated microbiomes include root microbiome and rhizosphere microbiome, which are closely related to plant life activities. Nearly 30% of photosynthesis products of plants are used to synthesize root compounds, there is evidence that root compounds regulate and significantly affect the root microbiome Tanshinones are the main hydrophobic components in Salvia miltiorrhiza. In order to study whether these compounds can regulate the root-associated microbiomes of S. miltiorrhiza, our study first identified a white root S. miltiorrhiza(BG) which contains little tanshinones. Retain of the fifth intron of tanshinones synthesis key enzyme gene SmCPS1 leading to the early termination of the SmCPS1 gene, and a stable white root phenotype. Further, wild type(WT) and BG were planted in greenhouse with nutrient soil(Pindstrup, Denmark) and Shandong soil(collected from the S. miltiorrhiza base in Weifang, Shandong), then high-throughput sequencing was used to analyze the root-associated microbiomes. The results showed that the tanshinones significantly affected the root-associated microbiomes of S. miltiorrhiza, and the impact on root microbiomes was more significant. There are significant differences between WT and BG root microbiomes in species richness, dominant strains and co-occurrence network. Tanshinones have a certain repelling effect on Bacilli which belongs to Gram-positive, while specifically attract some Gram-negative bacteria such as Betaproteobacteria and some specific genus of Alphaproteobacteria. This study determined the important role of tanshinones in regulating the structure of root-associated microbiomes from multiple angles, and shed a light for further improving the quality and yield of S. miltiorrhiza through microenvironment regulation.
Abietanes ; Microbiota ; Plant Roots ; Salvia miltiorrhiza

OBJECTIVE: Our previous research showed that Naotaifang (a compound traditional Chinese herbal medicine) extract (NTE) has clinically beneficial effects on neurological improvement of patients with acute cerebral ischemia. In this study, we investigated whether NTE protected acute brain injury in rats and whether its effects on ferroptosis could be linked to the dysfunction of glutathione peroxidase 4 (GPX4) and iron metabolism. METHODS: We established an acute brain injury model of middle cerebral artery occlusion (MCAO) in rats, in which we could observe the accumulation of iron in neurons, as detected by Perl's staining. Using assay kits, we measured expression levels of ferroptosis biomarkers, such as iron, glutathione (GSH), reactive oxygen species (ROS) and malonaldehyde (MDA); further the expression levels of transferrin receptor 1 (TFR1), divalent metal transporter 1 (DMT1), solute carrier family 7 member 11 (SLC7A11) and GPX4 were determined using immunohistochemical analysis, real-time quantitative polymerase chain reaction and Western blot assays. RESULTS: We found that treatment with NTE reduced the expression levels of TFR1 and DMT1, reduced ROS, MDA and iron accumulation and reduced neurobehavioral scores, relative to untreated MCAO rats. Treatment with NTE increased the expression levels of SLC7A11, GPX4 and GSH, and the number of Nissl bodies in the MCAO rats. CONCLUSION Taken together, our data suggest that acute cerebral ischemia induces neuronal ferroptosis and the effects of treating MCAO rats with NTE involved inhibition of ferroptosis through the TFR1/DMT1 and SCL7A11/GPX4 pathways.

Objective To investigate the clinical value and the experience of retroperitoneal laparoscopic nephrectomy in primary hospitals. Methods A retrospective analysis of 20 cases of retroperitoneal nephrectomy performed in the people's hospital of Jianshui from July 2014 to December 2017 and 23 cases of open nephrectomy in the same period as the control group, the two groups of surgery and postoperative recovery were analyzed and compared. Results The two groups of patients were operated successfully. The surgery time of the laparoscopic group was (110.14 ±15.63) min and the control group was (100.33 ±10.58) min. There was no statistical difference between the two groups (P＞0.05). No complications occurred during the follow-up period between the two groups, and the difference was not statistically significant. The intraoperative blood loss in the two groups was (40.63 ±22.21) ml and (80.45 ±38.31) m L respectively, and the difference was statistically significant (P＜ 0.05).The indwelling time of drainage tube in the two groups was (2-3) days and (6-7) days respectively. The difference was statistically significant (P＜ 0.05), and the hospitalization time was (3.2 ±2.2) days and (6.4 ± 3.3) days respectively, the difference was statistically significant (P＜0.05). Conclusions Laparoscopic nephrectomy has the advantages of less trauma, faster recovery and shorter hospital stay. With the improvement of operation technique, it will bring more advantages and be worth popularizing.

Objective To study the clinical efficacy of quadruple therapy for type 2 diabetic mellitus (DM) patients with Helicobacter pylori (Hp) positive peptic ulcer.Methods A total of 176 patients with Hp-positive peptic ulcer were enrolled in the control group and 122 Hp-positive peptic ulcer patients with type 2 diabetes were involved in the treatment group.Both groups were treated with oral rabeprazole 10 mg qd + oral clarithromycin 0.25 g bid + oral amoxicillin 0.5 g bid + oral citrate bismuth potassium 0.3 g qid.Clarithromycin and amoxicillin were used for the first 10 days,the remaining drugs are taking 4 weeks.The clinical efficacy and the incidence of adverse drug reactions between the groups were compared,and the relationship between the type 2 diabetes and the eradication of Hp were analyzed.Results After treatment,the total effective rates of the treatment group and the control group were 86.06％ (105/122 cases) and 94.32％ (166/176 cases) respectively,with statistically significant difference (P ＜ 0.05).The eradication rates of Hp in the treatment group and the control group were 72.13％ (88/122 cases) and 86.93％ (153/176 cases) respectively,and the difference was statistically significant (P ＜0.05).Adverse reactions in the treatment group were nausea,diarrhea and melena;adverse effects in the control group were nausea,diarrhea and vomiting.The incidences of adverse drug reactions in the treatment group and the control group were 9.83％ (12/122 cases) and 10.23％ (18/176 cases),without statistically significant difference (P ＞0.05).Conclusion The clinical efficacy of the control group was better than that of the treatment group,indicating that type 2 diabetes should be considered as a key factor in the treatment of Hp positive peptic ulcer.

OBJECTIVETo investigate the application of the plantar horn shaped fasciocutaneous perforator flaps for the reconstruction of the defects on heel and fore plantar.

METHODSThe proximal end of the plantar fasciocutaneous perforator flaps were at the edge of defects. The deep fascia was cut off at the both sides of flaps. The plantar fascia should be included into the flaps. Then the flaps were rotated to cover the defects, containing two or three perforators. If necessary, the original supplying vessels could be cut off to facilitate the advancement of flaps.

RESULTSFrom Jan. 2010 to Oct. 2012, 7 cases with plantar defects were treated with the horn shaped perforator flaps. The defects size ranged from 1.5 cm x 2.0 cm to 4.0 cm x5. 0 cm with the size of the flaps ranging from 7 cm x 3 cm to 13 cm x 7 cm. All the flaps survived completely with primary healing both on donor and recipient sites. The flap color, texture, function and appearance were satisfactory during the follow-up period of 3-24 months.

CONCLUSIONSThe plantar horn shaped perforator flap can reconstruct the defects at plantar weight-bearing area with the similar thick skin tissue, which facilitates the functional reconstruction. No skin graft is necessary for the defect at donor site.

Adult ; Female ; Foot Diseases ; surgery ; Humans ; Male ; Middle Aged ; Perforator Flap ; Reconstructive Surgical Procedures ; methods ; Skin Transplantation ; Soft Tissue Injuries ; surgery

Abdomen ; surgery ; Adult ; Female ; Humans ; Laparoscopy ; adverse effects ; Male ; Middle Aged ; Pneumoperitoneum, Artificial ; adverse effects ; Postoperative Complications ; etiology ; Prospective Studies ; Shoulder Pain ; etiology ; Visual Analog Scale