Chronic inflammation is critical in the onset and progression of atherosclerosis (AS). The lipopolysaccharide (LPS) level in the circulation system is elevated in AS patients and animal models, which is correlated with the severity of AS. Inspired by the underlying mechanism that LPS could drive the polarization of macrophages toward the M1 phenotype, aggravate inflammation, and ultimately contribute to the exacerbation of AS, LPS in the circulation system was supposed to be the therapeutic target for AS treatment. In the present study, polymyxin (PMB) covalently conjugated to PEGylated liposomes (PLPs) were formulated to adsorb LPS through specific interactions between PMB and LPS. In vitro, the experiments demonstrated that PLPs could adsorb LPS, reduce the polarization of macrophages to M1 phenotype and inhibit the formation of foam cells. In vivo, the study revealed that PLPs treatment reduced the serum levels of LPS and pro-inflammatory cytokines, decreased the proportion of M1-type macrophages in AS plaque, stabilized AS plaque, and downsized the plaque burdens in arteries, which eventually attenuated the progression of AS. Our study highlighted LPS in the circulation system as the therapeutic target for AS and provided an alternative strategy for AS treatment.

BACKGROUND: Immunotherapies such as adoptive immune cell infusion and immune-modulating agents are widely used for cancer treatment, and the concomitant symptoms, including cytokine release syndrome (CRS) or immune-related adverse events (irAEs), are frequently reported. However, clinical manifestations induced by mismatched donor granulocyte colony-stimulating factor mobilized peripheral blood mononuclear cell (GPBMC) infusion in patients receiving microtransplant (MST) have not yet been well depicted. METHODS: We analyzed 88 cycles of mismatched GPBMC infusion in patients with acute myeloid leukemia receiving MST and 54 cycles of chemotherapy without GPBMC infusion as a comparison. Clinical symptoms and their correlation with clinical features, laboratory findings, and clinical response were explored. RESULTS: Fever (58.0% [51/88]) and chills (43.2% [38/88]) were the significant early-onset symptoms after GPBMC infusion. Patients possessing less human leukocyte antigen-matching loci with the donor or those with unrelated donors experienced more chills (3 [2-5] loci vs. 5 [3-5] loci, P  = 0.043 and 66.7% [12/18] vs. 37.1% [26/70], P  = 0.024). On the other hand, those with decreased CD4 + /CD8 + T-cell ratio developed more fever (0.8 [0.7-1.2] vs. 1.4 [1.1-2.2], P  = 0.007). Multivariable analysis demonstrated that younger patients experienced more fever (odds ratio [OR] = 0.963, 95% confidence interval [CI]: 0.932-0.995, P  = 0.022), while patients with younger donors experienced more chills (OR = 0.915, 95% CI: 0.859-0.975, P  = 0.006). Elevated ultra-sensitive C-reactive protein levels in the absence of cytokine storm were observed following GPBMC infusion, which indicated mild and transient inflammatory response. Although no predictive value of infusion-related syndrome to leukemia burden change was found, the proportion of host pre-treatment activated T cells was positively correlated with leukemia control. CONCLUSIONS Mismatched GPBMC infusion in MST induced unique infusion-related symptoms and laboratory changes, which were associated with donor- or recipient-derived risk factors, with less safety and tolerance concerns than reported CRS or irAEs.
Humans ; Leukocytes, Mononuclear ; Hematopoietic Stem Cell Transplantation/adverse effects* ; Leukemia, Myeloid, Acute/therapy* ; Unrelated Donors ; Granulocyte Colony-Stimulating Factor ; Graft vs Host Disease

Objective:To observe the effect of interleukin-8 (IL-8) on the adhesion and migration of retinal vascular endothelial cells (RCEC).Methods:A cell experiment. Human RCEC (hRCEC) was divided into normal control group (N group), advanced glycation end product (AGE) treatment group (AGE group), and AGE-induced combined IL-8 antagonist SB225002 treatment group (AGE+SB group). The effect of AGE on IL-8 expression in hRCEC was observed by Western blot. The effect of SB225002 on hRCEC migration was observed by cell scratch assay. The effects of SB225002 on leukocyte adhesion and reactive oxygen species (ROS) on hRCEC were detected by flow cytometry. Student- t test was performed between the two groups. Oneway analysis of variance was performed among the three groups. Results:Compared with group N, the expression level of IL-8 in cells of AGE group was significantly increased, with statistical significance ( t=25.661, P<0.001). Compared with N group and AGE+SB group, cell mobility in AGE group was significantly increased ( F=29.776), leukocyte adhesion number was significantly increased ( F=38.159, 38.556), ROS expression level was significantly increased ( F=22.336), and the differences were statistically significant ( P<0.05). Conclusion:IL-8 antagonist SB225002 may down-regulate hRCEC adhesion and migration by inhibiting ROS expression.

Objective:To quantitatively analyze the protein expression changes of the optic nerve in an SD rat model of non-arteritic anterior ischemic optic neuropathy (NAION), and to make bioinformatics analysis of the differential proteins.Methods:Ten 8-week-old SPF male SD rats with a body mass of 200-250 g were selected.The NAION model was established using the method of rose bengal and laser photodynamics.Four from the 8 rats with successful model were selected as the NAION model group.Another 4 body weight- and age-matched healthy SD rats without eye diseases were taken as the normal control group.The optic nerve was dissected on the 7th day after modeling.The samples were prepared by the enzyme digestion method, and the proteins were identified and quantitatively detected by isobaric tag for relative and absolute quantification labeling combined with liquid chromatography-tandem mass spectrometry.The proteins with expression fold greater than 1.5 times and significant differences between the two groups ( P<0.05) were defined as differentially expressed proteins and analyzed by bioinformatics.The use and care of animals complied with Regulations for the Administration of Affair Concerning Experimental Animals by the State Science and Technology Commission of China.The study protocol was approved by an Animal Ethical and Welfare Committee of Tianjin Medical University Eye Hospital (No.TJYY2021041029). Results:Three days after modeling, the optic disc of rats was swollen and fluorescein leakage in the optic disc was detected in fluorescein fundus angiography images in the NAION model group, which indicated the model was established successfully.A total of 1 291 quantifiable proteins including 80 differentially expressed proteins were identified.Compared with the normal control group, there were 5 up-regulated proteins and 75 down-regulated proteins.The expression levels of collagen alpha-1(V) chain (Col5A1), cAMP-dependent protein kinase catalytic subunit beta (Prkacb) and disks large homolog 1(Dlg1) were increased, and the expression levels of neurofilament medium polypeptide (Nefm), microtubule-associated protein 1B (Map1b), Ras-related protein Ral-A (Rala), serine/threonine-protein kinase N2 (Pkn2) and platelet-activating factor acetylhydrolase IB subunit beta (Pafah1b1) were decreased.Differentially expressed proteins were mainly involved in the biological processes, including regulation of the cytoskeleton, cellular response to hypoxia, axon production and extension, regulation of synapse, regulation of neuron apoptosis and axo-dendritic transport, etc.KEGG pathway enrichment analysis showed that differentially expressed proteins were mainly involved in metabolic pathways, synaptic vesicle circulation and platelet activation.Conclusions:The expression of proteins related to signal pathways such as nerve growth, energy metabolism, axo-dendritic transport and apoptosis is involved in the apoptosis of neurons in NAION.

Objective:To investigate the effect of positive and negative pressure extubation on mechanical ventilation patients in the intensive care unit (ICU).Methods:A prospective randomized controlled study was performed, 105 ICU patients who successfully passed the spontaneous breathing test (SBT) after mechanical ventilation of Nanjing Jiangbei Hospital Affiliated to Nantong University from January 2019 to March 2021 were enrolled. According to random number table method, they were randomly divided into positive pressure extubation group (53 cases) and negative pressure extubation group (52 cases). During extubation, all patients were placed in semi-decubitus position (raising the head of bed at an angle range from 30°- 45°), the secretions from mouth, nose, throat and trachea were removed. In the negative pressure extubation group, the sputum suction tube was inserted into the tracheal tube and passed over the distal opening to carry out continuous negative pressure suction in the tracheal tube after disconnecting the ventilator. Meanwhile, after the tracheal tube balloon was evacuated, the sputum suction tube was pulled out together with the tracheal tube. In the positive pressure extubation group, the patients were guided to inspiratory forcibly under the original SBT mode. When the patients reached the inspiratory peak, the ballon was evacuated and the tracheal tube was removed. After extubation, all patients were given nasal catheter oxygen inhalation (oxygen flow 5 L/min). Arterial blood gas analysis indexes [pH value, arterial partial pressure of oxygen (PaO 2) and arterial partial pressure of carbon dioxide (PaCO 2)] were recorded 5 minutes and 1 hour after extubation in both groups. Vital signs (including tachypnea, tachycardia, elevated blood pressure and decreased oxygen saturation) and complications (including severe cough, airway hyperresponsiveness and pneumonia) were observed 30 minutes after extubation in both groups. Results:Five minutes after extubation, blood gas analysis showed that the PaO 2 of positive pressure extubation group was significantly higher than that of negative pressure extubation group [mmHg (1 mmHg≈0.133 kPa): 123.4±30.2 vs. 111.0±21.1, P < 0.05], the pH value and PaCO 2 in positive pressure extubation group were slightly lower than that of negative pressure extubation group [pH value: 7.411±0.042 vs. 7.419±0.040, PaCO 2 (mmHg): 39.7±4.7 vs. 40.5±5.6], but the differences were not statistically significant (both P > 0.05). One hour after extubation, the pH value, PaO 2 and PaCO 2 in positive pressure extubation group were slightly lower than those in negative pressure extubation group, but the differences were not statistically significant. Within 30 minutes after extubation, the incedences of tachypnea, tachycardia, elevated blood pressure and oxygen desaturationin in positive pressure extubation group were significantly lower than those in negative pressure extubation group [tachypnea: 9.4% (5/53) vs. 28.8% (15/52), tachycardia: 15.1% (8/53) vs. 32.7% (17/52), elevated blood pressure: 11.3% (6/53) vs. 30.8% (16/52), oxygen desaturation: 7.5% (4/53) vs. 34.6% (18/52), all P < 0.05], the incidence of severe cough in positive pressure extubation group was significantly lower than that in negative pressure extubation group [9.4% (5/53) vs. 30.8% (16/52), P < 0.05], but there was no significant difference in the incidence of complications of airway hyperresponsiveness between the two groups [1.9% (1/53) vs. 5.8% (3/52), P > 0.05]. No pneumonia occurred in both groups within 48 hours after extubation. Conclusion:The positive pressure extubation method can ensure full oxygenation of patients undergoing mechanical ventilation in ICU, avoid hypoxia, and reduce the occurrence of hypoxia and severe cough, which is more conducive to the stability of vital signs.

Objective:To observe clinical phenotypes and analyze the pathogenic genes of Leber congenital amaurosis (LCA).Methods:A retrospective clinical study. From 2019 to 2020, 2 patients diagnosed with LCA by genetic testing in Tianjin Medical University Eye Hospital and their 6 unaffected family members were enrolled in the study. Two patients were from 2 unrelated families, both were probands. The patient's medical history was inquired in detail, slit lamp microscopy, ultra-widefield fundus photography, autofluorescence, and flash visual evoked potential (F-VEP) were performed. Peripheral vein blood (3-5 ml) was collected and genomic DNA was extracted from all study subjects. A total of 381 pathogetic genes associated with inherited retinal diseases, were selected by targeted exome sequencing capture strategy. Sanger sequencing was used to verify suspected pathogenic mutations. Candidate pathogenic mutations were identified after bioinformatics analysis. Sanger sequencing, real-time quantitative polymerase chain reaction and family co-identification were used to confirm the final mutations.Results:Two patients were male, aged 3 and 27 years. One case had vision loss in both eyes, accompanied by nystagmus and acupressure eye sign since childhood. The clinical hallmark of the proband (F1-Ⅱ-3) in F1 includes clearly boundary of optic disc, normal retinal blood vessels and macular fovea. The implied period of the maximum forward wave in both eyes of F-VEP was roughly normal, and its amplitude decreased significantly. The phenotype of the proband (F2-Ⅱ-1) in F2 includes optic nerve head pallor, bone-spicule intraretinal pigmentation, "gold-foil maculopathy" , retina patchy hypo-autofluorescence in both eyes. There was no abnormal phenotype in the eyes of the family members. According to the genetic diagnosis, the proband (F1-Ⅱ-3) carried the GUCY2D gene c.835G>A (p.D279N) (M1) and exon 9-19 deletion (M2) compound heterozygous mutations, in which M1 was derived from healthy mother and M2 was derived from healthy father. The proband (F2-Ⅱ-1) carried CRB1 gene c.1576C>T(R526X) (M3) and c.1522T>C (C508R) (M4) compound heterozygous mutations, in which M3 from the healthy father, M4 from the healthy mother. M2 and M4 were novel mutations. Conclusion:GUCY2D gene mutations lead to LCA1 type in the F1 family, CRB1 gene mutations lead to LCA8 type in the F2 family; there are significant different phenotypes caused by different pathogenic genes.

Objective:To analyze the protein expression changes in the retina of non-arteritic anterior ischemic optic neuropathy (NAION) in rats.Methods:The rat NAION (rNAION) model was established by Rose Bengal and laser. Twenty Sprague-Dawley rats were randomly divided into 4 groups, the normal control group, the laser control group, the RB injection control group, and the rNAION model group, with 5 rats in each group. The right eye was used as the experimental eye. The retina was dissected at the third day after modeling. Enzyme digestion method was used for sample preparation and data collection was performed in a non-dependent collection mode. The data were quantitatively analyzed by SWATH quantitative mass spectrometry, searching for differential proteins and performing function and pathway analysis.Results:Compared with the other three control groups, a total of 184 differential proteins were detected in the rNAION group (expression fold greater than 1.5 times and P<0.05), including 99 up-regulated proteins and 85 down-regulated proteins. The expressions of glial fibrillary acidic protein, guanine nucleotide binding protein 4, laminin 1, 14-3-3γ protein YWHAG were increased. Whereas the expressions of Leucine-rich glioma-inactivated protein 1, secretory carrier-associated membrane protein 5, and Clathrin coat assembly protein AP180 were decreased. The differential proteins are mainly involved in biological processes such as nerve growth, energy metabolism, vesicle-mediated transport, the regulation of synaptic plasticity, apoptosis and inflammation. Pathway enrichment analysis showed that PI3K-Akt signaling pathway and complement and thrombin reaction pathway was related to the disease. Conclusion:The protein expressions of energy metabolism, nerve growth, synaptic vesicle transport and PI3K-Akt signaling pathway can regulate the neuronal regeneration and apoptosis in NAION.

Objective:To investigate the diagnostic value of neutrophil CD64 index in sepsis patients in intensive care unit (ICU).Methods:A prospective case-control study was conducted, the patients admitted to ICU of Jiangbei People's Hospital Affiliated to Nantong University from December 2016 to June 2020 were enrolled. According to the criteria of Sepsis 3, 107 patients diagnosed with sepsis were classified as the sepsis group, 112 patients without infection were classified as control group. Peripheral venous blood samples were collected within 24 hours after ICU admission, neutrophil CD64 index, C-reactive protein (CRP), procalcitonin (PCT), white blood cell count (WBC) were detected. Receiver operating characteristic curve (ROC curve) was used to evaluate the diagnostic value of neutrophil CD64 index, CRP, PCT and WBC for sepsis.Results:The neutrophil CD64 index, CRP and PCT in sepsis group were significantly higher than those in control group [neutrophil CD64 index: 9.03±5.59 vs. 3.18±1.50, CRP (mg/L): 146.9±68.3 vs. 46.5±35.8, PCT (ng/L): 31.82±14.71 vs. 1.87±1.42, all P < 0.05]. ROC curve analysis showed that neutrophil CD64 index, CRP and PCT had certain diagnostic value for sepsis, the area under ROC curve (AUC) were 0.924, 0.915 and 0.879, respectively, the 95% confidence intervals (95% CI) were 0.871-0.978, 0.855-0.975, 0.807-0.951, respectively, P values were 0.016, 0.017 and 0.026, respectively. Among the three indicators, the diagnostic value of neutrophil CD64 index was much higher. When the optimal cut-off value was 4.32, the sensitivity and specificity were 83.6% and 88.7%, respectively, which were higher than the sensitivity (75.1%, 76.3%) and specificity (87.2%, 82.5%) of CRP and PCT. Conclusion:Neutrophil CD64 index is a valuable biomarker for the diagnosis of sepsis in ICU.

Objective:To observe the relationship between the response to anti-vascular endothelial growth factor (VEGF) drug treatment and single nucleotide polymorphism (SNP) genotype in patients with wet age-related macular degeneration (wAMD).Methods:A retrospective clinical study. From August 2019 to September 2020, 103 eyes of 103 wAMD patients diagnosed in Tianjin Medical University Eye Hospital were included in the study. Among them, there were 59 males (57.28%, 59/103) and 44 females (42.72%, 44/103); the average age was 68.74±7.74 years. The standard logarithmic visual acuity chart was used to detect the Best Corrected Visual Acuity of the affected eye and converted to the logarithmic minimum angle of resolution (logMAR) visual acuity during statistics. Optical coherence tomography was used to detect the central retinal thickness (CRT) of the affected eye. At the same time, the patient's high-density lipoprotein cholesterol (HDL-C) was tested. All eyes were treated with intravitreal injection of anti-VEGF drugs once a month for 3 months. Before the initial treatment, peripheral venous blood from the patient were collected. Interleukin-8 ( IL-8), complement C3 gene ( C3), complement factor H ( CFH), liver lipase ( LIPC), cholesterol ester transfer protein ( CETP), ATP binding cassette subfamily a member 1 ( ABCA1), lipoprotein lipase ( LPL), fatty acid desaturation gene cluster ( FADS1) SNP. According to gene frequency, genotypes are divided into wild type and mutant type were detected. Qualitative data such as the frequency difference of the genotype distribution in the clinical phenotype and the Hardy-Weinberg equilibrium of the genotype distribution were compared with the Chi-square test or Fisher's exact test. Results:There were fewer CRT responders in IL-8 rs4073 mutant (TA+AA) patients than wild-type (TT) [odds ratio ( OR)=0.310, 95% confidence interval ( CI) 0.106-0.910, P<0.05). Among them, after the drug stratification test, the proportion of patients with IL-8 rs4073 locus TT genotype in the conbercept treatment group was less CRT non-responders ( OR=0.179, 95% CI=0.034-0.960, P=0.033). Patients with LIPC rs2043085 mutant (CT+TT) with BCVA increased ≥0.2 logMAR are more likely than wild-type (CC) ( OR=3.031, 95% CI 1.036-8.867, P<0.05); HDL-C level was significantly lower Compared with wild type (CC), the difference was statistically significant ( t=2.448, P=0.016). There was no significant difference in logMAR BCVA and CRT between IL-8 rs4073, LIPC rs2043085 mutant and wild-type patients before treatment ( IL-8 rs4073: Z=-0.198, -1.651; P=0.843, 0.099; LIPC rs2043085: Z=-0.532, -0.152; P=0.595, 0.879). C3 rs 225066, CFH rs800292, CETP rs708272, ABCA1 rs1883025, FADS1 rs174547, LPL rs12678919 have no correlation with anti-VEGF drug treatment response. Conclusions:Patients with wAMD are treated with anti-VEGF drugs. Those with IL-8 rs4073 locus A genotype may be less responsive to CRT. LIPC rs2043085 locus T genotypes may be relatively more responsive to BCVA.

Cell-Free Nucleic Acids ; blood ; Female ; Humans ; Mosaicism ; Placenta ; Pregnancy