Publications by authors named "Zhengfeng Liu"

Article Synopsis
  • - The study aimed to examine the clinical features of paracentral acute middle maculopathy (PAMM) and assess changes in blood flow within the eye's capillary networks using optical coherence tomography angiography (OCTA).
  • - Twelve PAMM patients and thirteen healthy participants were included, with measurements revealing reduced blood flow in both the superficial and deep capillary plexuses in PAMM patients compared to healthy individuals.
  • - Results indicated that PAMM is often associated with other health issues (like hypertension and diabetes), and the research confirmed significant decreases in blood flow density in the affected regions of the eye for those with PAMM.
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  • The study aimed to assess the impact of early treatment with sacubitril/valsartan on heart function and recovery in patients experiencing acute myocardial infarction (AMI).
  • A total of 295 patients were divided into two groups: one received sacubitril/valsartan along with standard treatment, while the other received benazepril with standard treatment, and various health markers were compared after six months.
  • Results showed that the sacubitril/valsartan group had better heart function and fewer major cardiac events compared to the benazepril group, indicating its effectiveness in improving outcomes after AMI without significantly increasing side effects.*
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Cholesteric liquid crystal microcapsules (CLCMs) are used to improve the stability of liquid crystals while ensuring their stimulus response performance and versatility, with representative applications such as sensing, anticounterfeiting, and smart fabrics. However, the reflectivity and angular anisotropy decrease because of the anchoring effect of the polymer shell matrix, and the influence of particle size on this has not been thoroughly studied. In this study, the effect of synthesis technology on microcapsule particle size was investigated using a complex coalescence method, and the effect of particle size on the reflectivity and angular anisotropy of CLCMs was investigated in detail.

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Beckwith-Wiedemann Syndrome (BWS) is an epigenetic overgrowth syndrome caused by methylation changes in the human 11p15 chromosomal locus. Patients with BWS exhibit tissue overgrowth, as well as an increased risk of childhood neoplasms in the liver and kidney. To understand the impact of these 11p15 changes, specifically in the liver, we performed single-nucleus RNA sequencing (snRNA-seq) and single-nucleus assay for transposase-accessible chromatin with sequencing (snATAC-seq) to generate paired, cell-type-specific transcriptional and chromatin accessibility profiles of both BWS-liver and nonBWS-liver nontumorous tissue.

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Ten-eleven translocation (TET) enzymes iteratively oxidize 5-methylcytosine (5mC) to generate 5-hydroxymethylcytosine (5hmC), 5-formylcytosine, and 5-carboxylcytosine to facilitate active genome demethylation. Whether these bases are required to promote replication-coupled dilution or activate base excision repair during mammalian germline reprogramming remains unresolved due to the inability to decouple TET activities. Here, we generated two mouse lines expressing catalytically inactive TET1 (Tet1-HxD) and TET1 that stalls oxidation at 5hmC (Tet1-V).

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DNA lesions trigger DNA damage checkpoint (DDC) signaling which arrests cell cycle progression and promotes DNA damage repair. In , phosphorylation of histone H2A (γH2A, equivalent to γH2AX in mammals) is an early chromatin mark induced by DNA damage that is recognized by a group of DDC and DNA repair factors. We find that γH2A negatively regulates the G2/M checkpoint in response to the genotoxin camptothecin, which is a DNA topoisomerase I poison.

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Article Synopsis
  • DNA methylation removal is essential for reprogramming primordial germ cells in mammals, involving TET enzymes which convert 5-methylcytosine into other forms to enable active demethylation.
  • Researchers created two mouse models to better understand TET enzyme roles: one with inactive TET1 and another that limits oxidation to 5hmC.
  • The study found that TET1's extra-catalytic functions are crucial for managing hypermethylated regions in sperm, while both TET oxidation and iterative processes are necessary for certain imprinted regions during male germline development.
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Background: It is vital to distinguish between inflammatory and malignant lymphadenopathy in human immunodeficiency virus (HIV) infected individuals. The purpose of our study was to differentiate the variations in the clinical characteristics of HIV patients, and apply F-FDG PET/CT parameters for distinguishing of malignant lymphoma and inflammatory lymphadenopathy in such patients.

Methods: This retrospective cross-sectional study included 59 consecutive HIV-infected patients who underwent whole-body F-FDG PET/CT.

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Aim: To observe changes in the best-corrected visual acuity (BCVA), central macular thickness (CMT), and central choroidal thickness (CCT) of patients with macular edema (ME) secondary to ischemic retinal vein occlusion (iRVO) following intravitreal Conbercept injection.

Methods: This retrospective study included 33 eyes from 33 patients who received intravitreal injections of Conbercept for ME secondary to iRVO. Treatments were performed on a 3+ (3+PRN) basis.

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Aim: To investigate the cytotoxic effect of specific T cells from mice with experimental autoimmune uveitis (EAU) as well as their secreted interferon (IFN)-γ and interleukin (IL)-17A on murine photoreceptor (661W) cells.

Methods: An EAU model was established in female mice by injection of interphotoreceptor retinoid binding protein (IRBP) emulsion supplemented with complete Freund's adjuvant (CFA) and (TB). On day 12 after induction of EAU, specific T cells from spleen and lymph node tissues were isolated and cultured for 4d and the levels of IFN-γ and IL-17A in the supernatants were determined by enzyme-linked immunosorbent assays (ELISAs).

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Rationale: To report a case of diode laser transscleral cyclophotocoagulation (DLTSC) for uveitis-glaucoma-hyphema syndrome (UGH).

Patient Concerns: The patient developed UGH on the right eye (OD) after vitrectomy and intraocular lens (IOL) implantation.

Diagnoses: Best corrected visual acuity (BCVA) was HM/50 cm, intraocular pressure (IOP) was 51.

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Rationale: To report a rare case of 8-year-old girl patient with central retinal venous occlusion (CRVO) with hyperhomocysteinemia.

Patient Concerns: The patient had a 2-year history on painless visual loss in the left eye.

Diagnoses: All examination results were within normal limits except plasma homocysteine (HCY).

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The aims of this study were to observe the antimicrobial effect and mechanism of cinnamon oil combined with gamma radiation on Gamma radiation increased the antimicrobial activity of cinnamon oil, and the relative radiation sensitivity of gamma radiation on was increased by cinnamon oil. Gamma radiation significantly increased the changes of bacterial morphology, intra-adenosine 5'-triphosphate (intra-ATP) and extra-ATP concentrations and pH value of treated cinnamon oil. Although, gamma radiation used alone didn't damage the bacterial morphology and ATP concentrations significantly.

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Rationale: Pulmonary arteriovenous malformations (PAVMs) complicated with multiple organ abscesses is an uncommon manifestation. Because of the low incidence of the disease, F-18 fluorodeoxyglucose positron emission tomography with computed tomography (F-FDG PET/CT) imaging studies for PAVMs complicated with multiple organ abscesses are scarce.

Patient Concerns: We report a case of a 54-year-old man presenting with PAVMs complicated with synchronous multiple organ abscesses founded by F-FDG PET/CT.

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A series of novel hexahydropyrrolo[2,3-b]indole-1H-imidazolium salts were synthesized and evaluated in vitro against a panel of human tumor cell lines. The results suggest that the 5,6-dimethyl-benzimidazole ring, and substitution of the imidazolyl-3-position with a 2-bromobenzyl or 2-naphthylmethyl group, were important for the cytotoxic activity. Notably, Compound 43, bearing a 2-bromobenzyl substituent at position-3 of 5,6-dimethyl-benzimidazole, was found to possess the most potent derivative against five human tumor cell lines with IC50 values below 2.

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Article Synopsis
  • - The study explored changes in microRNA (miRNA) genomics in the blood lymphocytes of rats with experimental autoimmune uveitis (EAU) compared to control rats.
  • - Researchers induced EAU in six Lewis rats and analyzed the isolated lymphocytes, finding 36 miRNAs were upregulated and 31 downregulated, with some linked to immune signaling pathways.
  • - The results suggest that these differentially expressed miRNAs could be significant for early detection, prognosis, and potential treatment of uveitis, highlighting their role in immune processes.
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Experimental autoimmune uveitis, a well-established model for human uveitis, is similar to human uveitis in many pathological features. Studies concerning the mechanisms of experimental autoimmune uveitis would cast a light on the pathogenesis of human uveitis as well as the search for more effective therapeutic agents. The cellular components of innate immunity include natural killer cells, gamma delta T lymphocytes, antigen-presenting dendritic cells, phagocytic macrophages, and granulocytes.

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Uveitis is a severe autoimmune eye disease that can cause intraocular inflammation even lead to severe vision loss, and the occurrence of uveitis can be closely associated with abnormal expression of proteins. However, the abnormally expressed proteins involved in uveitis are not well identified. Using liquid chromatography-tandem mass spectrometry technique, we examined the alterations in proteomic expression profiling in rat plasma specimens related to experimental autoimmune uveitis (EAU) versus normal samples.

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Purpose: To report a case of Valsalva retinopathy treated by neodymium-doped yttrium aluminum garnet (Nd:YAG) laser and discuss the previously reported treatments for Valsalva retinopathy.

Case Report: A 35-year-old-woman experienced a sudden painless visual loss in her left eye after lifting heavy bags of manure on the farm. The patient was diagnosed as having Valsalva retinopathy.

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Purpose: Angiogenesis is an important mediator in tumor progression. Vascular endothelial growth factor (VEGF) is one of the major cytokines that can influence angiogenesis. However, the potential mechanism of tumor growth inhibition through anti-VEGF agents is still unclear.

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Although radiation-induced bystander effects are frequently observed biological phenomena, the mechanism for these effects has not been fully determined. The target-hit theory and related concepts from microdosimetry provide a convenient formalism to help identify the nature of the targets responsible for initiating the emission of diffusible factors in medium transfer experiments. We used the microdosimetric models proposed by Stewart et al.

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The existence of radiation-induced bystander effects mediated by diffusible factors is now accepted, but the mechanisms and precise behavior at low doses remain unclear. We exposed cells to gamma-ray doses in the range 0.04 mGy-5 Gy, harvested the culture medium, and transferred it to unirradiated reporter cells.

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