Objective To investigate CT appearances of abdominal primary malignant fibrous histiocytoma(MFH).Methods The CT characteristics,clinical features and pathological data of 1 7 patients with MFH proved pathologically were analyzed retrospectively. Results The lesions located in retroperitoneum were 6,in liver were 5,in kidney were 2,in superior mesentery was 1,in greater omentum was 1,in stomach was 1,in ileum was 1.The lesions are oval shape,lobulated,nodule shape,and the size of these lesions were large. 2 cases of MFH located in gastrointestinal tract were slightly low density,and the remaining were uneven high density due to necro-sis.In CT contrast enhanced scan,the solid portion and internal divisions showed progressive or continuous enhancement,and the nec-rosis were not enhanced in MFH located in the retroperitoneum,the greater omentum,the superior mesentery and the liver.MFH in kidney was poorly circumscribed and showed mild progressive enhancement lower than normal renal parenchyma.The stomach and ileum lesions showed uniform and continuous enhancement with normal gastrointestinal mucosa in corresponding parts.Conclusion Imaging features of retroperitoneal MFH were the same as those of interstitial tumors,and most tumors showed features of progres-sive and persistent enhancement,but have different imaging appearances with the malignant lesions in corresponding parts.

To contrast the methodology of measuring cup placement precision utilizing Mimics and Matlab programming, based on clinical CT images of primary THA cases with computer assisted navigated surgery (CANS) and with the traditional manual method (MANS). The method was applied and analyzed to measure cup anteversion, cup abduction of 50 clinical cases with CANS and MANSThe results show that, cup placement precision differences exits between primary THA cases with CANS and MANS; more cases with CANS are within the safe zone contrasting MANS, and there was less variation and less placement error in CANS cases. CANS can improve cup placement precision and reduce the chance of dislocation efficiently.
Arthroplasty, Replacement, Hip ; instrumentation ; methods ; Humans ; Surgery, Computer-Assisted ; methods

BACKGROUNDTreatment with melatonin significantly reduces lung injury induced by bleomycin, paraquat and ischemia reperfusion. In the present study, we investigated the possible protective roles of melatonin in pulmonary inflammation and lung injury during acute endotoxemia.

METHODSThirty-two male Sprague-Dawley rats were randomly assigned to four groups: vehicle + saline group, melatonin + saline group, vehicle + lipopolysaccharide group, melatonin + lipopolysaccharide group. The rats were treated with melatonin (10 mg/kg, intraperitoneal injection (i.p.)) or vehicle (1% ethanol saline), 30 minutes prior to lipopolysaccharide administration (6 mg/kg, intravenous injection). Four hours after lipopolysaccharide injection, samples of pulmonary tissue were collected. Blood gas analysis was carried out. Optical microscopy was performed to examine pathological changes in lungs and lung injury score was assessed. Wet/dry ratios (W/D), myeloperoxidase activity, malondialdehyde concentrations and tumor necrosis factor-alpha (TNF-alpha) and interleukin-10 (IL-10) levels in lungs were measured. The pulmonary expression of nuclear factor-kappa B (NF-kappaB) p65 was evaluated by Western blotting.

RESULTSPaO(2) in the vehicle + lipopolysaccharide group decreased compared with that in the vehicle + saline group. This decrease was significantly reduced in the melatonin + lipopolysaccharide group. The lung tissues from the saline + lipopolysaccharide group were significantly damaged, which were less pronounced in the melatonin + lipopolysaccharide group. The W/D ratio increased significantly in the vehicle + lipopolysaccharide group (6.1 +/- 0.18) as compared with that in the vehicle + saline group (3.61 +/- 0.3) (P < 0.01), which was significantly reduced in the melatonin + lipopolysaccharide group (4.8 +/- 0.25) (P < 0.01). Myeloperoxidase activity and malondialdehyde levels increased significantly in the vehicle + lipopolysaccharide group compared with that in the vehicle + saline group, which was reduced in the melatonin + lipopolysaccharide group. The TNF-alpha level of pulmonary tissue increased significantly in the vehicle + lipopolysaccharide group ((8.7 +/- 0.91) pg/mg protein) compared with that in the vehicle + saline group ((4.3 +/- 0.62) pg/mg protein, P < 0.01). However, the increase of TNF-alpha level of pulmonary tissue was significantly reduced in the melatonin + lipopolysaccharide group ((5.9 +/- 0.56) pg/mg protein, P < 0.01). Pulmonary IL-10 levels were elevated markedly in the vehicle + lipopolysaccharide group in contrast to that in the vehicle + saline group, whereas the elevation was augmented in the melatonin + lipopolysaccharide group. The nuclear localization of p65 increased markedly in the vehicle + lipopolysaccharide group and this enhancement of nuclear p65 expression was much less in the melatonin + lipopolysaccharide group.

CONCLUSIONMelatonin reduces acute lung injury in endotoxemic rats by attenuating pulmonary inflammation and inhibiting NF-kappaB activation.

Acute Lung Injury ; drug therapy ; pathology ; Animals ; Blotting, Western ; Endotoxemia ; drug therapy ; physiopathology ; Interleukin-10 ; metabolism ; Lipopolysaccharides ; toxicity ; Lung ; drug effects ; metabolism ; Male ; Melatonin ; pharmacology ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Tumor Necrosis Factor-alpha ; metabolism

BACKGROUNDValproic acid (VPA) improves early survival and organ function in a highly lethal poly-trauma and hemorrhagic shock model or other severe insults. We assessed whether VPA could improve organ function in a rat model of septic shock and illustrated the possible mechanisms.

METHODSForty Sprague-Dawley rats were randomly assigned to four groups (n = 10): control group, VPA group, LPS group, and LPS + VPA group. Lipopolysaccharide (LPS) (10 mg/kg) was injected intravenously to replicate the experimental model of septic shock. Rats were treated with VPA (300 mg/kg, i.v.) or saline. Six hours after LPS injection, blood was sampled for gas analysis, measurement of serum alanine aminotransferase, aspartate aminotransferase, urine nitrogen, creatinine and tumor necrosis factor-alpha. Lung, liver and kidney were collected for histopathological assessment. In addition, myeloperoxidase activity and tumor necrosis factor-a in pulmonary tissue were measured. Acetylation of histone H3 in lung was also evaluated by Western blotting.

RESULTSLPS resulted in a significant decrease in PaO2, which was increased by VPA administration followed LPS injection. In addition, LPS also induced an increase in the serum levels of alanine aminotransferase, aspartate aminotransferase, urine nitrogen, creatinine, and tumor necrosis factor-alpha. However, these increases were attenuated in the LPS + VPA group. The lungs, liver and kidneys from the LPS group were significantly damaged compared with the control group. However, the damage was attenuated in the LPS + VPA group. Myeloperoxidase activity and tumor necrosis factor-alpha levels in pulmonary tissue increased significantly in the LPS group compared with the control group. These increases were significantly inhibited in the LPS + VPA group. Acetylation of histone H3 in lung tissue in the LPS group was inhibited compared with the control. However, the level of acetylation of histone H3 in the LPS + VPA group was markedly elevated in contrast to the LPS group.

CONCLUSIONSTreatment with VPA can attenuate multiple organ damage caused by LPS induced septic shock. Our data also suggest that the beneficial effects are in part due to the decrease in inflammatory cytokines and restoration of normal acetylation homeostasis.

Acute Kidney Injury ; drug therapy ; metabolism ; Animals ; Blotting, Western ; Chemical and Drug Induced Liver Injury ; drug therapy ; metabolism ; Lung Injury ; drug therapy ; metabolism ; Male ; Multiple Organ Failure ; drug therapy ; metabolism ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Shock, Septic ; drug therapy ; metabolism ; Valproic Acid ; therapeutic use

BACKGROUNDErythropoietin elicits protective effects in lung tissue injury induced by ischaemic reperfusion and hyperoxia. We investigated the protective roles of erythropoietin in pulmonary inflammation and lung injury during acute endotoxaemia.

METHODSA total of 32 male Sprague-Dawley rats were randomly assigned to four groups: saline group, erythropoietin + saline group, saline + lipopolysaccharide group and erythropoietin + lipopolysaccharide group. Rats were treated with erythropoietin (3000 U/kg, i.p.) or saline, 30 minutes prior to lipopolysaccharide administration (6 mg/kg, i.v.). Four hours after lipopolysaccharide injection, samples of pulmonary tissue were collected. Optical microscopy was performed to examine pathological changes in lungs. Wet/dry (W/D) ratios, myeloperoxidase activity, malondialdehyde concentrations and tumour necrosis factor-alpha (TNF-alpha) as well as interleukin 1 beta (IL-1beta) levels in lungs were measured. The pulmonary expression of nuclear factor kappaB (NF-kappaB) p65 was evaluated by Western blotting. Differences between the different groups were analysed by one-way analysis of variance (ANOVA).

RESULTSThe lung tissues from the saline + lipopolysaccharide group were significantly damaged, which were less pronounced in the erythropoietin + lipopolysaccharide group. The W/D ratio increased significantly in the saline + lipopolysaccharide group (5.75 +/- 0.22) as compared with the saline group (3.85 +/- 0.20) (P < 0.01), which was significantly reduced in the erythropoietin + lipopolysaccharide group (4.50 +/- 0.35) (P < 0.01). Myeloperoxidase activity and malondialdehyde levels increased significantly in the saline + lipopolysaccharide group compared with the saline group, which was reduced in the erythropoietin + lipopolysaccharide group. The TNF-alpha level of pulmonary tissue increased significantly in the saline + lipopolysaccharide group ((9.80 +/- 0.82) pg/mg protein) compared with the saline group ((4.20 +/- 0.42) pg/mg protein, P < 0.01). However, the increase of TNF-alpha level of pulmonary tissue was significantly reduced in the erythropoietin + lipopolysaccharide group ((6.50 +/- 0.66) pg/mg protein, P < 0.01). Similarly, pulmonary IL-1beta levels were elevated markedly in the saline + lipopolysaccharide group in contrast to the saline group, whereas the elevation was much less in the erythropoietin + lipopolysaccharide group. The nuclear localization of p65 increased markedly in the saline + lipopolysaccharide group and this enhancement of nuclear p65 expression was much less in the erythropoietin + lipopolysaccharide group.

CONCLUSIONErythropoietin attenuates pulmonary inflammation and suppresses TNF-alpha and IL-1beta overproduction during acute endotoxaemia, which is partially mediated by inhibition of NF-kappaB.

Animals ; Anti-Inflammatory Agents ; pharmacology ; Blotting, Western ; Endotoxemia ; immunology ; metabolism ; pathology ; Erythropoietin ; pharmacology ; Interleukin-1beta ; metabolism ; Lung ; drug effects ; immunology ; metabolism ; pathology ; Lung Injury ; chemically induced ; immunology ; Male ; Malondialdehyde ; metabolism ; NF-kappa B ; metabolism ; Organ Size ; Peroxidase ; metabolism ; Rats ; Rats, Sprague-Dawley ; Tumor Necrosis Factor-alpha

Adult ; Aged ; Cell Cycle Proteins ; analysis ; Coal Mining ; Cyclin-Dependent Kinase Inhibitor p27 ; Female ; Humans ; Immunohistochemistry ; Lung ; chemistry ; pathology ; Male ; Middle Aged ; Occupational Diseases ; metabolism ; Pneumoconiosis ; metabolism ; Tumor Suppressor Proteins ; analysis

OBJECTIVETo screen out the HAb18G/CD147 binding peptides and find out an antagonist against hepatoma invasion.

METHODSHAb18G/CD147 was purified by affinity chromatographic method and the antigen binding peptides acquired by bio-panning a phage-displayed 12-peptide library. After obtaining the sequence of the selected phage-displayed peptides, all the 9 peptides were synthesized by solid-phase method and identified by mass spectrograph. The peptides' anti-metastatic function was tested by Boyden Chamber assay.

RESULTSThe purified HAb18G/CD147, identified by Western blot (molecular weight about 65 kd) could be used to bio-pan the phage-displayed peptide library. After 3 rounds of bio-panning, 9 positive phage clones were selected and sequenced. The synthesized peptides had uneven inhibitory activities and three of them were able to markedly inhibit the hepatoma cell invasion (P < 0.01). The most effective peptide decreased by 90.1% of hepatoma cells migrating through the Boyden Chamber membrane as compared with the control.

CONCLUSIONBio-panning the phage-displayed peptide library can be used successfully to screen out the antigen binding peptides. Hepatoma metastatic potential can be inhibited by peptide antagonist which could be a good foundation of developing peptide therapeutic agent against hepatoma metastasis.

Animals ; Antibodies, Monoclonal ; therapeutic use ; Basigin ; metabolism ; Carcinoma, Hepatocellular ; drug therapy ; pathology ; Humans ; Liver Neoplasms ; drug therapy ; pathology ; Mice ; Neoplasm Invasiveness ; Peptide Library ; Peptides ; therapeutic use

BACKGROUNDNoninvasive functional magnetic resonance imaging (fMRI) techniques have opened a "window" into the brain, allowing us to investigate the anatomical and physiological function involving acupuncture needling. Imaging its sustained effect rather than acute effect on the brain networks may further help elucidate the mechanisms by which acupuncture achieves its therapeutic effects. In this study, we aimed to investigate the functional brain networks during the post-resting state following acupuncture at KI3 in comparison with acupuncture at GB40.

METHODSNeedling at acupoints GB40 and KI3 was performed in twelve subjects. Six minutes of scanning at rest were adopted before and after acupuncture at different acupoints. Then we divided the whole brain into 39 regions and constructed functional brain networks during the post-acupuncture resting states (PARS).

RESULTSFor direct comparisons, increased correlations during post-resting state following acupuncture at KI3 compared to resting state (RS) were primarily located between the dorsolateral prefrontal cortex (DLPFC) and post temporal cortex, ventromedial prefrontal cortex (vmPFC) and post temporal cortex. These brain regions were all cognitive-related functions. In contrast, the increased connections between the anterior insula and temporal cortex mainly emerged following acupuncture at GB40 compared with the RS.

CONCLUSIONSThe present study demonstrates that acupuncture at different acupoints belonging to the same anatomic segment can exert different modulatory effects on the reorganizations of post-acupuncture RS networks. The heterogeneous modulation patterns between two conditions may relate to the functional specific modulatory effects of acupuncture.

Acupuncture Points ; Acupuncture Therapy ; Adult ; Brain ; metabolism ; physiology ; Female ; Humans ; Magnetic Resonance Imaging ; Male ; Young Adult

OBJECTIVETo investigate the protective effects of glycyl-glutamine dipeptide supplement on the function of myocardial dynamics in severely burned rats, and to explore its mechanism.

METHODSOne hundred and thirty-six Wistar rats were randomly divided into five groups: i. e, control group (C, n = 8, without burns), burn group (B, n = 32), Gln group (Gln, n = 32), Gly group (Gly, n = 32) and Gly-Gln group (Gly-Gln, n = 32). The rats in the latter four groups were respectively treated with tyrosine (1.5 g x kg(-1) x d(-1)), glutamine (1.0 g x kg(-1) x d(-1)) and tyrosine (0.5 g x kg(-1) x d(-1)), glycine (0.5 g x kg(-1) x d(-1)) and tyrosine (1.0 g x kg(-1) x d(-1)), and Glycyl-glutamine dipeptide (1.5 g x kg(-1) x d(-1)) after receiving a 30% TBSA full-thickness burn on the back. Glutathione (GSH), adenosine monophosphate (AMP), adenosine diphosphate (ADP), adenosine triphosphate (ATP), cell energy charge (EC) and the index of myocardial dynamics (ASOP, AODP, LVSP, + dp/dtmax) were measured at 12, 24, 48, 72 post-burn hours (PBH).

RESULTSThe content of GSH, ATP, EC and the level of aortic systolic pressure (ASOP), aortic diastolic blood pressure (AODP), left ventricular end diastolic pressure (LVEDP) and maximum rate of intraventricular pressure rise/down (+ dp/dtmax) in B, Gln, Gly, Gly-Gln groups were obviously lower than those in C group (P < 0.01), while the levels of AMP and ADP showed an opposite tendency. Compared with B group, the above indices were ameliorated. The content of GSH (72.7 +/- 1.7) micromol/g in Gly-Gln group at 12 PBH was obviously higher than that in Gln group (67.8 +/- 3.8) micromol/g (P < 0.01). The levels of EC and AOSP were obviously higher in Gly-Gln group than that in Gln group (P < 0.01). The level of GSH, EC, AOSP in Gly-Gln groups were obviously higher than those in Gly group at 48 PBH.

CONCLUSIONGlycyl-glutamine dipeptide, Gly and Gln supplementation after burns can improve the content of GSH and high energy phosphate compound, and suppress the decline of myocardial dynamics function. The effects of Glycyl-glutamine dipeptide is better than single Gly or Gln, indicating that the protective effect on myocardial function after severe burns by Gln and Gly is synergistic.

Animals ; Burns ; drug therapy ; metabolism ; Dipeptides ; pharmacology ; Glutathione ; metabolism ; Glycine ; Myocytes, Cardiac ; drug effects ; metabolism ; Random Allocation ; Rats ; Rats, Wistar

AIM: To explore the curative effect of 25G vitrectomy combined with different anti-vascular endothelial growth factor(VEGF)drugs on patients with proliferative diabetic retinopathy(PDR).METHODS: PDR patients admitted to the hospital between July 2018 and July 2020 were enrolled as the research subjects, and they all underwent 25G vitrectomy and were administrated anti-VEGF drugs at 7d before surgery. They were divided into ranibizumab group(31 cases, 31 eyes), conbercept group(30 cases, 30 eyes)and aflibercept group(29 cases, 29 eyes)according to different treatment. The aqueous humor was collected before intravitreal injection and during vitrectomy to detect levels of VEGF and pigment epithelial-derived factor(PEDF). The best corrected visual acuity(BCVA)and central macular thickness(CMT)were detected before surgery and at 3 and 6mo after surgery.RESULTS: After intravitreal injection, level of VEGF in aqueous humor was significantly decreased in all groups(P<0.05), while PEDF level was increased in all groups(P<0.05), but there was no significant difference among the three groups(P>0.05).There was no significant difference in operation time, the occurrence of intraoperative hemorrhage and iatrogenic retinal breaks among the three groups(P>0.05).BCVA among the three groups at 3 and 6mo after surgery was significantly better than that before surgery(P<0.05), and CMT was significantly thinner than that before surgery(P<0.05), but there was no significant difference among the three groups(P>0.05).CONCLUSION: Intravitreal injection of anti-VEGF drugs before vitrectomy in PDR patients can reduce the expressions of vascular-related factors in aqueous humor. The clinical effect and safety of vitrectomy combined with ranibizumab, conbercept and aflibercept, respectively, are comparable in the treatment of PDR.