JOURNAL OF CELLULAR AND MOLECULAR MEDICINE最新文献

Acrylamide is broadly utilized in numerous areas with different purposes including being an additive, flocculating, sealing, dry strength improver and polymerizing agent, and so forth. Furthermore, it forms in certain food products at high temperatures. It poses serious hazard since its readily water-soluble and very reactive nature. Besides in vivo studies, several in vitro studies with various cell lines are carried out to evaluate its toxicity. However, of these cell line studies, there are no mesothelium or mesothelioma cell lines. To fill this lacuna, we aimed at examining various dose range of acrylamide on SPC212 human mesothelioma cell line. First, we executed MTT and neutral red cytotoxicity tests and ascertained IC50 dose. Next, we performed inverted, light (haematoxylin–eosin and May Grünwald), fluorescent (DAPI) and confocal microscope (AO/EB) analyses as well as immunohistochemistry for Bax, Bcl-2 and PCNA proteins. As a result, we found IC50 of acrylamide at 2.65 mM. Starting from 3.13 mM of acrylamide dose, a deep decrease in cell proliferation was observed. Particularly in MTT assay, a proliferative action of acrylamide was detected at 0.39 and 0.78 mM, supported with inverted microscope images. In light microscope analysis, several cellular degenerations, including condensed and kidney-shaped nucleus were evident. In AO/EB staining, cells with apoptotic characteristics augmented dose-dependently, being upheld by a parallel uptick in Bax and a dimunition in Bcl-2 staining. Besides, PCNA decreased at IC50 dose of acrylamide. This is the acrylamide-associated first study conducted on SPC212 mesothelioma cells encompassing advanced morphological analysis. We believe this study to be an incentive for future studies.

Cellai C, Balliu M, Laurenzana A, et al. The new low-toxic histone deacetylase inhibitor S-(2) induces apoptosis in various acute myeloid leukaemia cells. J Cell Mol Med. 2012;16:1758-1765. doi:10.1111/j.1582-4934.2011.01464.x.

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Inflammation and immunosuppression are important features of tumours, including oral squamous cellular carcinoma (OSCC). Interleukin 37 (IL37), a cytokine known for the ability to suppress inflammation and immunity, shows two seemingly contradictory functions in tumours. This study aims to investigate the mechanism that regulates IL37 and its role in OSCC progression. Herein, IL37, CD86 and CD206 in OSCC specimens were determined. Hypoxia, MCC950 and siRNA-Gasdermin D (GSDMD) were utilised to investigate the mechanism of IL37 production and release. Animal experiments were established to examine the role of IL37 in OSCC growth in vivo. We found the levels of IL37 are elevated in OSCC tissues compared with normal oral mucosa. In cell experiments, hypoxia was proved to be a vital facilitator in IL37 expression and release. Mechanically, hypoxia promoted IL37 expression through the activation of NACHT–LRR–PYD-containing protein 3 (NLRP3) inflammasome, and promoted IL37 release via GSDMD. Furthermore, IL37 levels in OSCC specimens are positively correlated with the number of M2 macrophages, but negatively with M1. Further studies revealed IL37 facilitated OSCC progression via promoting macrophage polarization from M1 to M2 and enhancing tumour cell proliferation. Thus, IL37 could be a promising target for OSCC treatment in the future.

Glycine N-acyltransferase (GLYAT), known to influence glycine metabolism, has been implicated in the progression of various malignant tumours. However, its clinical relevance in hepatocellular carcinoma (HCC) remains unexplored. Here, GLYAT expression levels in HCC tissues were significantly reduced compared to normal liver tissues. Similarly, GLYAT expression levels in Huh 7, HepG2, PLC and SK-HEP1 were lower than those in LO2. Receiver operating characteristic curve analysis demonstrated that GLYAT exhibited good diagnostic performance for HCC. Kaplan–Meier analyses suggested that decreased GLYAT expression was correlated with poorer progress in HCC. Low GLYAT expression was significantly associated with gender and histologic grade. Multivariate Cox regression analysis identified low GLYAT expression and T stage as independent prognostic factors. Nomograms based on GLYAT mRNA expression and T stage showed good concordance with actual survival rates at 1, 2, 3 and 5 years. Moreover, GLYAT downregulation in the Huh 7 cell line enhanced cell proliferation, invasion and migration abilities, while GLYAT overexpression in the HepG2 cell line inhibited these abilities. HCC patients with low GLYAT expression exhibited a predisposition to immune escape and poor response to immunotherapy. This research revealed that GLYAT holds promise as both a prognostic biomarker and a potential therapeutic target in HCC.

5-fluorouracil (5-FU) is a preferred chemotherapeutic agent for the treatment of colon cancer. Nonetheless, its clinical effectiveness is frequently hampered by suboptimal therapeutic outcomes and the emergence of drug resistance. Therefore, there exists a pressing demand for novel therapeutic agents to circumvent chemoresistance. The pregnane X receptor (PXR) exerts a pivotal regulatory influence on the proliferation, invasion, and chemoresistance mechanisms in colon cancer. Activation of PXR drives up the transcription of the multidrug resistance gene (MDR1), thus prompting the expression of P-glycoprotein (P-gp) responsible for conferring tumour resistance. This study scrutinized the potential of Fengliao Changweikang (FLCWK) in augmenting the efficacy of 5-FU in the management of colon cancer. To this end, we engineered colon cancer cells with varied levels of PXR expression via lentiviral transfection, subsequently validating the findings in nude mice. By means of MTT assays, flow cytometry apoptosis analysis, Western blotting and immunofluorescence, we probed into the prospective impacts of FLCWK and 5-FU on cellular viability and resistance. Our results revealed that while upregulation of PXR amplified the therapeutic benefits in colon cancer treatment, it concurrently heightened resistance levels. FLCWK demonstrated a capacity to reduce P-gp expression, with the combined administration of FLCWK and 5-FU effectively reversing resistance mechanisms. Furthermore, activation of PXR was found to impede the IL-6/STAT3 signalling pathway. In an effort to mimic the development of colon cancer, we established an azomethane oxide (AOM)/ dextran sodium sulfate (DSS) mouse model, showing that FLCWK bolstered the inhibitory effects of 5-FU, impeding the progression of colon cancer. In summation, our findings point towards the potential of FLCWK in the treatment of colon cancer, particularly in strengthening the therapeutic efficacy of 5-FU in the prevention and control of the disease.

Periodontitis is a significant independent risk factor for atherosclerosis. Yet, the exact mechanism of action is still not fully understood. In this study, we investigated the effect of exosomes-miR-155-5p derived from periodontal endothelial cells on atherosclerosis in vitro and in vivo. Higher expression of miR-155-5p was detected in the plasma exosomes of patients with chronic periodontitis (CP) and carotid atherosclerosis (CAS) compared to patients with CP. Also, the expression level of miR-155-5p was associated with the severity of CP. miR-155-5p-enriched exosomes from HUVECs increased the angiogenesis and permeability of HAECs and promoted the expression of angiogenesis, permeability, and inflammation genes. Along with the overexpression or inhibition of miR-155-5p, the biological effect of HUVECs-derived exosomes on HAECs changed correspondingly. In ApoE−/− mouse models, miR-155-5p-enriched exosomes promoted the occurrence of carotid atherosclerosis by increasing permeable and angiogenic activity. Collectively, these findings highlight a molecular mechanism of periodontitis in CAS, uncovering exosomal miR-155-5p derived periodontitis affecting carotid endothelial cells in an ‘exosomecrine’ manner. Exosomal miR-155-5p may be used as a biomarker and target for clinical intervention to control this intractable disease in future, and the graphic abstract was shown in Figure S1.

Myocardial injury induced by ischemia–reperfusion (I/R) remains a difficult clinical problem. However, the exact mechanisms underlying I/R-induced have yet to be clarified. CARD9 is an important cytoplasmic-binding protein. In this study, an immunocoprecipitation assay showed that SUMOylation of the CARD9 protein promoted the binding of CARD9 to HOXB5, but hindered the O-GlcNAc glycosylation of HOXB5, a predicted transcription factor of Parkin and a key factor in mitophagy. O-GlcNAc glycosylation is an important signal for translocation of proteins from the cytoplasm to the nucleus. CARD9 protein SUMOylation is regulated by PIAS3, which is related to I/R-induced myocardial injury. Therefore, we propose that knockdown of PIAS3 inhibits SUMOylation of the CARD9 protein, facilitates the dissociation of CARD9 and HOXB5, which increases the O-GlcNAc-mediated glycosylation of HOXB5, while the resulting HOXB5 nuclear translocation promotes Parkin-induced mitophagy and alleviates myocardial I/R injury.

The adventitial fibroblast (AF) is the most abundant cell in the vascular adventitia, a few studies had confirmed that AF contributed to abdominal aortic aneurysm (AAA) development; YAP1 involved in several vascular diseases by promoting AF transformed to myofibroblast, the role of YAP1 in AAA is not clear yet. This study aims to determine whether YAP1 play a role in AAA process by regulating AF function. We found the expression of YAP1was significantly increased in aneurysm tissues of AAA patients compared to normal adjacent vascular tissues and mainly in adventitia. YAP1 also upregulated in elastase-induced and CaCl₂-induced mice AAA model. Suppressed YAP1 function with YAP1 inhibitor-Verteporfin declined AAA incident rate remarkably in mice, and the collagen deposition in the adventitia was alleviated obviously. Afterwards, we studied the effect of YAP1 on the function of AF, Verteporfin was used to block YAP1 in vitro, the process of AF transforming to myofibroblast and migration were almost completely eliminated after inhibiting YAP1 expression. This study demonstrated that YAP1 may play a key role in AAA development, inhibiting YAP1 significantly reduced AAA formation through suppressed the process of AF transformed to myofibroblast and migration.

Bipolar disorder (BD) is a psychiatric condition that is frequently misdiagnosed and linked to inadequate treatment. Long non-coding RNAs (lncRNAs) have lately gained recognition as crucial genetic elements and are now regarded as regulatory mechanisms in the neurological system. Our objective was to measure the quantities of HOXA-AS2 and MEG3 ncRNA transcripts. HOXA-AS2 and MEG3 ncRNA levels were checked in the peripheral blood of 50 type I BD and 50 control samples by real-time PCR. Furthermore, we conducted ROC curve analysis and correlation analysis to examine the association between gene expression and specific clinical characteristics in instances with BD. Additionally, a computational study was performed to investigate the binding sites of miRNAs on the HOXA-AS2 and MEG3 lncRNAs. BD subjects showed a significant increase in the expression of HOXA-AS2 and MEG3 compared to controls. The lncRNAs HOXA-AS2 and MEG3 have an area under the ROC curve (AUC) values of 0.70 and 0.71, respectively. There was a significant correlation between the expression levels of ncRNAs HOXA-AS2 and MEG3 in the peripheral blood of patients with BD and occupation scores. The data presented indicate a potential correlation between the expression of HOXA-AS2 and MEG3 lncRNAs with an elevated risk of BD. Furthermore, these lncRNAs may be linked to several molecular pathways. Our findings indicate that the amounts of lncRNAs HOXA-AS2 and MEG3 in transcripts might be a promising potential biomarker for patients with BD.

Li T, Hu SM, Pang XY, et al. The marine-derived furanone reduces intracellular lipid accumulation in vitro by targeting LXRα and PPARα. J Cell Mol Med. 2020;24:3384-3398. doi:10.1111/JCMM.15012

In Ting Li et al., several incorrect images were used in Figure 3B. The correct figure is shown below. The related fluorescent images were shown in the Supporting Information. The authors confirm all results and conclusions of this article remain unchanged.