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The enrichment of peri-cancerous adipocytes is one of the distinctive features of colorectal cancer (CRC), which accelerates the disease progression and worsens the prognosis. The communication between tumor cells and adjacent adipocytes plays an important role in this process. However, the detailed mechanisms remain largely unknown. Here we demonstrated MIIP is downregulated in high-grade CRC, and revealed its role and mechanism in tumor cell-adipocyte communication. By detecting MIIP expression in CRC tissues and adjacent normal tissues, we found MIIP was significantly decreased in CRC, and was closely related to adjacent adipocytes browning. In detail, MIIP reduction altered the N-linked glycosylation modification of AZGP1 and thus alleviated the inhibition of secretion. AZGP1, a critical lipid mobilization factor, led to the intensification of adipocytes browning and the release of free fatty acids (FFAs), which in turn fueled for CRC progression. Our data demonstrate that MIIP plays a key regulatory role in the communication between CRC and neighboring adipocytes by mediating AZGP1 secretion, and MIIP reduction leads to adipose browning-induced cancer rapid progression and poor prognosis.

PurposeImmune thrombocytopenic (ITP) is an autoimmune bleeding disease with genetic susceptibility. In this research, we conducted an in-depth genomic analysis of a cohort of patients and elucidated the molecular features associated with the pathogenesis of ITP.MethodHigh-molecular-weight genomic DNA was extracted from freshly frozen bone marrow blood mononuclear cells (BMBMCs) from 20 active ITP patients. Next, the samples were subjected to molecular genetic analysis by whole-exome sequencing (WES), and the results were confirmed by Sanger sequencing. The signalling pathways and cellular processes associated with the mutated genes were identified with gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses.ResultsThe results of this study revealed 3,998 missense mutations involving 2,269 genes in more than 10 individuals. Some unique genetic variants, including phosphatase and tensin homologue (PTEN), insulin receptor (INSR) and coagulation factor C homology (COCH) variants, were the most associated with the pathogenesis of ITP. Functional analysis revealed that these gene mutations mainly affected the phosphoinositide 3 kinase (PI3K)/protein kinase B (Akt) signalling pathways (signal transduction) and platelet activation (immune system).ConclusionsOur findings demonstrate the functional connections between these gene variants and ITP. Although the underlying mechanisms and the impact of these genetic variants remain to be revealed through further investigation, the application of next-generation sequencing in ITP in this paper is valuable for revealing the genetic mechanisms of ITP.SummaryImmune thrombocytopenic (ITP) is an autoimmune bleeding disease with genetic susceptibility. DNA mutation profile of ITP patient bone marrow samples (n=20) were investigated by using next-generation sequencing (NGS), and then confirmed by sanger sequencing method. Our results showed PTEN, INSR and COCH were mutated in all ITP patients. Functional analysis revealed these mutation genes mainly participate PI3K/Akt signaling pathways and platelet activation. These results suggest that genetic alterations might be involved in the pathogenesis of ITP.

ABTRASTAs transcriptional co-activator of AP-1/Jun, estrogen receptors and NF-κB, nuclear protein RBM39 also involves in precursor mRNA (pre-mRNA) splicing. Porcine reproductive and respiratory syndrome virus (PRRSV) causes sow reproductive disorders and piglet respiratory diseases, which resulted in serious economic losses worldwide. In this study, the up-regulated expression of RBM39 and down-regulated of inflammatory cytokines (TNF, IL-1β) were determined in PRRSV-infected 3D4/21 cells, and accompanied with the PRRSV proliferation. The roles of RBM39 altering phosphorylation of c-Jun to inhibit the AP-1 pathway to promote PRRSV proliferation were further verified. In addition, the nucleocytoplasmic translocation of RBM39 and c-Jun from nucleus to cytoplasm were enhanced in PRRSV-infected cells. The three RRM domain of RBM39 are crucial to support the proliferation of PRRSV. several PRRSV RNA (nsp4, nsp5, nsp11 and N) binding with RBM39 were determined, which may also contribute to the PRRSV proliferation. Our results revealed a complex mechanism of RBM39 by altering c-Jun phosphorylation and nucleocytoplasmic translocation, and regulating binding of RBM39 with viral RNA to prompt PRRSV proliferation. The results provide new viewpoints to understand the immune escape mechanism of PRRSV infection.

The development of lateral roots in Arabidopsis thaliana is strongly dependent on signaling directed by the AUXIN RESPONSE FACTOR7 (ARF7), which in turn activates LATERAL ORGAN BOUNDARIES DOMAIN (LBD) transcription factors (LBD16, LBD18 and LBD29). Here, the product of PRH1, a PR-1 homolog annotated previously as encoding a pathogen-responsive protein, was identified as a target of ARF7-mediated auxin signaling and also as participating in the development of lateral roots. PRH1 was shown to be strongly induced by auxin treatment, and plants lacking a functional copy of PRH1 formed fewer lateral roots. The transcription of PRH1 was controlled by the binding of both ARF7 and LBDs to its promoter region., Author summary In Arabidopsis thaliana AUXIN RESPONSE FACTOR7 (ARF7)-mediated auxin signaling plays a key role in lateral roots (LRs) development. The LATERAL ORGAN BOUNDARIES DOMAIN (LBD) transcription factors (LBD16, LBD18 and LBD29) act downstream of ARF7-mediated auxin signaling to control LRs formation. Here, the PR-1 homolog PRH1 was identified as a novel target of both ARF7 and LBDs (especially the LBD29) during auxin induced LRs formation, as both ARF7 and LBDs were able to bind to the PRH1 promoter. This study provides new insights about how auxin regulates lateral root development.