Publications by authors named "Nana Meng"

Diabetic cardiomyopathy (DCM) is a myocardial disorder resulting from glucose metabolism dysfunction, leading to structural and functional heart abnormalities independent of common cardiovascular conditions. This study explores the impact of Mammalian Sterile20-like Kinase 1 (Mst1) and Nuclear Factor E2-Related Factor 2 (Nrf2) pathways on autophagy in type 2 diabetic mice. By employing Mst1 knockout and Nrf2 activation, improvements in cardiac function reduced myocardial fibrosis, and decreased cardiomyocyte apoptosis was observed, with enhanced autophagy noted in Mst1 knockout mice further augmented by Nrf2 activation.

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Hepatocellular carcinoma(HCC) has a high mortality and morbidity rate and seriously jeopardizes human life. Chemicals and chemotherapeutic agents have been experiencing problems such as side effects and drug resistance in the treatment of HCC, which cannot meet the needs of clinical treatment. Therefore, finding novel low-toxicity and high-efficiency anti-hepatocellular carcinoma drugs and exploring their mechanisms of action have become the current problems to be solved in the treatment of HCC.

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Aim: To test the effect of autophagy on inflammatory damage resulting from oxidative stress in adult retinal pigment epithelial cell line (ARPE-19).

Methods: ARPE-19 cells were pretreated with 200 and 600 µmol/L hydrogen peroxide (HO) at various time intervals. The changes of cell morphology, cell viability, reactive oxygen species (ROS) level, autophagic activity, and the inflammatory cytokines (TNFα, IL-6, and TGFβ) were measured at baseline and after treatment with autophagy inducer rapamycin (Rapa) and suppressor wortmannin (Wort) or shATG5.

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Photothermal therapy combined with chemotherapy has shown great promise in the treatment of cancer. In this synergistic system, a safe, stable, and efficient photothermal agent is desired. Herein, an effective photothermal agent, carbon quantum dots (CQDs), was initially synthesized and then rationally constructed a folic acid (FA)-targeted photothermal multifunctional nanoplatform by encapsulating CQDs and the anticancer drug doxorubicin (DOX) in the liposomes.

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Rationale: Sclerosing angiomatoid nodular transformation (SANT) of the spleen is an uncommon benign vascular lesion with an obscure etiology. It predominantly affects middle-aged women and presents with nonspecific clinical signs, making preoperative diagnosis challenging. The definitive diagnosis of SANT relies on pathological examination following splenectomy.

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Article Synopsis
  • The blood-brain barrier (BBB) and blood-brain tumor barrier (BBTB) limit the effectiveness of chemotherapy for treating gliomas, necessitating a drug delivery system that can target glioma cells specifically while reducing overall toxicity.
  • Researchers identified high expression of glucose-regulated protein 78 (GRP78) and dopamine receptor D2 in glioma tissues, and synthesized a "Y"-shaped peptide to enhance drug affinity and targeting capability.
  • The developed peptide-drug conjugate (pHA-AOHX-VAP-DOX) effectively crossed the BBB and BBTB, targeted glioma cells, improved survival in animal models, and reduced the side effects of the chemotherapy drug doxorubicin (DOX
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Background: The predictive value of the methylation of Long non-coding RNA (lncRNA) metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) and H19 promoters in peripheral blood leukocytes as a non-invasive biomarker for the chemotherapy effect and prognosis gastric cancer (GC) is unclear.

Methods: The DNA methylation of H19 and MALAT1 between chemotherapy-sensitive and non-sensitive groups and between groups with better and worse survival of GC was compared using regression analyses. Several predictive nomograms were constructed.

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Background: Although previous studies have found that parenting style significantly predicts emotional and behavioral problems (EBPs) among Chinese adolescents, the mechanism between different parenting styles and EBPs requires in-depth investigation. In our study, we aimed to investigate the mediating effect of resilience, a positive psychological characteristic, between parenting style and EBPs among Chinese adolescents.

Methods: In this cross-sectional study, we used a multistage stratified cluster random sampling method to collect data in Shenyang, Liaoning Province from November to December 2019.

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Acute purulent enteritis is uncommon, which occasionally occurs in association with mechanical injuries from foreign bodies of helminth parasites and the contaminated food, leading to bacterial invasion. Herein we report a case of acute purulent enteritis after appendectomy. A 44-year-old male was diagnosed with right lower abdominal pain and vomiting.

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Objective: The objective of this study is to comprehensively investigate the potential value of BNIP3 and DAPK1 methylation in peripheral blood leukocytes as a non-invasive biomarker for the detection of gastric cancer (GC), prediction of chemotherapy efficacy, and prognosis assessment.

Patients And Methods: Initially, multiple bioinformatic analyses were employed to explore the genetic landscape and biological effects of BNIP3 and DAPK1 in GC tissues. Subsequently, case-control and prospective follow-up studies were conducted to compare the differences in BNIP3 and DAPK1 methylation levels in peripheral blood leukocytes among GC patients and healthy controls, as well as between patients exhibiting sensitivity and resistance to platinum plus fluorouracil treatment, and between patients with varying survival outcomes of GC.

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Background: Idiopathic epiretinal membrane (iERM) is a common disorder of the vitreomacular interface characterized by decreased visual acuity and metamorphopsia. This study aimed to analyze the association between the anatomical change of the retina and functional outcomes in iERM patients so as to derive the prognostic factors of visual acuity (VA) and metamorphopsia.

Methods: Forty-five patients (one eye per patient; 45 eyes in total) who underwent pars plana vitrectomy and membrane peeling for iERM by a single surgeon were enrolled in this retrospective study.

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Infectious disease pandemics, including the coronavirus disease 2019 pandemic, have heightened the demand for vaccines. Although parenteral vaccines induce robust systemic immunity, their effectiveness in respiratory mucosae is limited. Considering the crucial role of nasal-associated lymphoid tissue (NALT) in mucosal immune responses, in this study, the intranasal complex composed of G5-BGG and antigen-expressing plasmid DNA (pSP), named G5-BGG/pSP complex, is developed to activate NALT and to promote both systemic and mucosal immune defense.

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Background: The global burden of digestive diseases has been rising in the last 30 years. The rates and trends of incidence, deaths, and disability-adjusted life-years (DALYs) for digestive diseases need to be investigated.

Methods: We extracted the data on overall digestive diseases and by cause between 1990-2019 from the Global Burden of Diseases 2019 website, including the absolute number and the corresponding age-standardized rates of incidence (ASIR), deaths (ASDR), and DALYs (ASDALYs).

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Background: Lack of comprehending key factors of schizophrenia relapse has impeded its effective treatment, indicating that the mechanism clarification and available intervention of schizophrenia relapse required further amelioration.

Method: Based on the integration of LC-MS and H NMR metabolomics, a weighted correlation network was established to screen pivotal factors of accelerating schizophrenia relapse. Then, the cluster most correlated with schizophrenia relapse was explored, and the biological function of cluster was investigated.

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Article Synopsis
  • There is growing evidence that the effectiveness of nanodrugs in fighting tumors is much better in mouse models than in actual human tumors, likely due to the different characteristics of tumor models used.
  • The study found that faster-growing tumors have lower vascular tight junctions, which increases the accumulation of nanodrugs, while orthotopic tumors have low transport activities, making it hard for nanodrugs to target these tumors effectively.
  • The researchers emphasize that the enhanced permeability and retention (EPR) effect varies significantly between different tumor models, suggesting that it may not be a one-size-fits-all approach for designing antitumor nanodrugs, and caution against overstating their effectiveness based on preclinical results.
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Failure of the normal process of cell death pathways contributes to the defection of immune systems and the occurrence of cancers. The key genes, the multimolecular mechanisms, and the immune functions of these genes in pan-cancers remain unclear. Using online databases of The Cancer Genome Atlas, GEPIA2, TISIDB, HPA, Kaplan-Meier Plotter, PrognoScan, cBioPortal, GSCALite, TIMER, and Sangerbox, we identified the key genes from the six primary cell death-related pathways and performed a comprehensive analysis to investigate the multimolecular characteristics and immunological functions of the hub genes in 33 human cancers.

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Thrombolytic agents have thus far yielded limited therapeutic benefits in the treatment of thrombotic disease due to their short half-life, low targeting ability, and association with serious adverse reactions, such as bleeding complications. Inspired by the natural roles of platelets during thrombus formation, we fabricated a platelet-based delivery system (NO@uPA/PLTs) comprising urokinase (uPA) and arginine (Arg) for targeted thrombolysis and inhibition of re-embolism. The anchoring of uPA to the platelet surface by lipid insertion increased the thrombotic targeting and circulation duration of uPA without disturbing platelet functions.

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Growing evidence has shown the oncogenic function of matrix metallopeptidase 7 (MMP7) in various tumors. However, no systemic pan-cancer analysis on the association between MMP7 and different cancers based on big clinical data is available. TIMER2, GEPIA2, UALCAN, cBioPortal, String, Metascape, and other web databases were searched in the present study.

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Chemotherapy is still the mainstay treatment for metastatic triple-negative breast cancers (TNBC) currently in clinical practice. The unmet needs of chemotherapy for metastatic TNBC are mainly from the insufficient drug delivery and unavailable targeting strategy that thwart the whole progression of metastatic TNBC. The in vivo ligands-mediated active targeting efficiency is usually affected by protein corona.

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Introduction: The high development of tourism is considered a factor that facilitates the global spread of infectious diseases. The association between tourism and the epidemic of coronavirus diseases 2019 (COVID-19) remains unclear.

Methodology: We retrieved the data of COVID-19 in 178 countries/territories from the Center for Systems Science and Engineering at Johns Hopkins University.

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Rationale: Agenesis of the dorsal pancreas (ADP) is a rare congenital anomaly of the pancreas. ADP is associated with some other medical problems such as diabetes mellitus, abdominal pain/bloating, pancreatitis, pancreatic neuroendocrine tumor and so on. In this study, we present a case of ADP with chronic suppurative pancreatitis, summarize the clinical characteristics of the reported cases in China and review the correlative literature.

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Background: Lack of clinically specific biomarkers has impeded the precise diagnosis of schizophrenia, meanwhile, limited comprehending of pathogenesis for schizophrenia has restricted the effective treatment.

Method: An integrated multi-omic approach, combining metabolomic platform (LC-MS and H NMR) and transcriptomic platform, was established to differentiate healthy subjects from schizophrenia patients. Based on filtered metabolites and genes, characteristic spectrums were further built.

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Introduction: The early diagnosis and detection could greatly improve the clinical outcome of gastric cancer (GC) patients. However, the non-invasive biomarkers for GC detection remain to be identified.

Method: We used online databases (GEPIA, UALCAN, Kaplan-Meier plotter, TIMER, and MEXPRESS) to explore the association between H19 or metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) expression in tissues and the occurrence, development, prognosis, the levels of immune cell infiltration, and methylation of GC; the correlation between mRNA expression and DNA methylation levels of genes were also examined.

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Drug resistance caused by the extreme genetic variability of zhe hepatitis C virus has rendered effective combinations of drugs indispensable in the treatment of chronic hepatitis C (CHC). Herein, we developed a fixed-dose combination (FDC) treatment containing the NS5B inhibitor sofosbuvir (SOF) and the NS5A inhibitor fopitasvir (FOP). Then the dissolution behavior of FOP in FOP/SOF FDC was improved by co-micronizing FOP with lactose.

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