Identification of the targets of hematoporphyrin derivative in lung adenocarcinoma using integrated network analysis

BACKGROUND: Hematoporphyrin derivative (HPD) has a sensibilization effect in lung adenocarcinoma. This study was conducted to identify the target genes of HPD in lung adenocarcinoma. METHODS: RNA sequencing was performed using the lung adenocarcinoma cell line A549 after no treatment or treatment with X-ray or X-ray + HPD. The differentially expressed genes (DEGs) were screened using Mfuzz package by noise-robust soft clustering analysis. Enrichment analysis was carried out using "BioCloud" online tool. Protein-protein interaction (PPI) network and module analyses were performed using Cytoscape software. Using WebGestalt tool and integrated transcription factor platform (ITFP), microRNA target and transcription factor (TF) target pairs were separately predicted. An integrated regulatory network was visualized with Cytoscape software. RESULTS: A total of 815 DEGs in the gene set G1 (continuously dysregulated genes along with changes in processing conditions [untreated-treated with X-ray-X-ray + treated with HPD]) and 464 DEGs in the gene set G2 (significantly dysregulated between X-ray + HPD-treated group and untreated/X-ray-treated group) were screened. The significant module identified from the PPI network for gene set G1 showed that ribosomal protein L3 (RPL3) gene could interact with heat shock protein 90 kDa alpha, class A member 1 (HSP90AA1). TFs AAA domain containing 2 (ATAD2) and protein inhibitor of activated STAT 1 (PIAS1) were separately predicted for the genes in gene set G1 and G2, respectively. In the integrated network for gene set G2, ubiquitin-specific peptidase 25 (USP25) was targeted by miR-200b, miR-200c, and miR-429. CONCLUSION: RPL3, HSP90AA1, ATAD2, and PIAS1 as well as USP25, which is targeted by miR-200b, miR-200c, and miR-429, may be the potential targets of HPD in lung adenocarcinoma.

Construction and identification of a mouse spermatocyte-derived cell line with a stable expression of PIAS-NY / 中华男科学杂志

<p><b>OBJECTIVE</b>To construct a lentiviral expression vector of the PIAS-NY gene, and establish a mouse spermatocyte-derived cell line with a stable overexpression of PIAS-NY.</p><p><b>METHODS</b>PIAS-NY was synthesized, amplified by PCR and cloned into the lentiviral vector expression plasmid pGC-FU. After digestion and sequencing, pGC-FU-PIAS-NY, pHelper 1.0 and pHelper 2.0 were co-transfected into 293T cells. Then the lentiviral particles were used to transfect the mouse spermatocyte-derived cells. The expression of the PIAS-NY protein was detected by Western blot.</p><p><b>RESULTS</b>We successfully constructed the lentiviral expression vector pGC-FU-PIAS-NY and established a mouse spermatocyte-derived cell line with a stable overexpression of PIAS-NY.</p><p><b>CONCLUSION</b>The construction of the lentiviral expression vector pGC-FU-PIAS-NY and the obtainment of stably transfected mouse spermatocyte-derived cells have paved the way for further studies on the roles of the PIAS-NY gene in spermatogenesis.</p>

Expression of STAT3 and PIAS3 in renal tissues of MRL/lpr mice / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the expression of STAT3 and PIAS3 in the renal tissues of rats with lupus nephritis.</p><p><b>METHODS</b>The kidneys were harvested from 18-week-old female MRL/lpr mice (lupus nephritis model group) and age-matched female BALB/C mice (normal control group). The expressions of STAT3 and PIAS3 mRNA in the renal tissues were measured by real-time quantitative RT-PCR, and the protein levels of STAT3 and p-STAT3 were examined using Western blotting and immunohistochemistry. The laboratory indices and renal histopathology of the mice were also investigated.</p><p><b>RESULTS</b>The urinary protein, blood urea nitrogen (BUN) and creatinine levels were significantly higher in MRL/lpr mice than in the control mice (P<0.05). The renal histopathology of MRL/lpr mice was characterized by increased mesangiocapillary proliferation and prominent inflammatory infiltration in the tubulo-interstitium, which were absent in the kidneys of normal control mice. Compared with the control mice, MRL/lpr mice showed significantly increased STAT3 mRNA and p-STAT3 protein levels in the renal tissues (P<0.05) with significantly lowered levels of PIAS3 mRNA (P<0.01). No significant difference was noted in the total STAT3 protein levels between MRL/lpr and control mice.</p><p><b>CONCLUSION</b>MRL/lpr mice have significantly increased expressions of STAT3 mRNA and p-STAT3 protein and decreased expression of mRNA PIAS3 in the kidneys compared with BALB/C mice.</p>

Screening PIAS2-interacting proteins in the mouse using the yeast two-hybrid system / 中华男科学杂志

<p><b>OBJECTIVE</b>To screen and identify PIAS2-interacting proteins from the mouse spermatogonial cDNA library using the yeast two-hybrid system, and to investigate the action mechanism of PIAS2 in spermatogenesis.</p><p><b>METHODS</b>With pGBKT7-PIAS2 as a bait plasmid, the positive clones interacting with pGBKT7-PIAS2 were screened from the mouse spermatogonial cDNA library, the inserted fragments were sequenced and underwent bioinformatic analysis, and their interaction was verified using the yeast two-hybrid system.</p><p><b>RESULTS</b>Through screening, sequencing, homology analysis and yeast two-hybrid verification, we obtained 8 different candidate proteins interacting with PIAS2, including Cyfip2, Psmb3, Nmel, nischarin, Ints10, Nsun5, Gnb211 and Ndufaf3.</p><p><b>CONCLUSION</b>Eight different genes were successfully obtained using the yeast two-hybrid system, and their encoding proteins interacted with PIAS2, which might be related with male fertility regulation. Our findings have offered some new clues to the action mechanism of PIAS2 in spermatogenesis.</p>

Research on the effects of PIAS3 expression on the invasion of glioma TJ905 cells / 中华外科杂志

<p><b>OBJECTIVES</b>To investigate the function and possible mechanisms of PIAS3 expression on the invasion of TJ905 cells.</p><p><b>METHODS</b>PIAS3 overexpression vectors were constructed and PIAS3 siRNA were chemically synthesized, which were separately transfected into TJ905 cells for upregulation or downregulation of PIAS3 expression levels in TJ905 cells. After that, the invasive effects of TJ905 cells were measured by Transwell assay, and the expression of PIAS3, tissue inhibitor of metalloproteinases (TIMP)3, matrix metalloprotease (MMP)-2, and MMP-9 were identified by Western blot.</p><p><b>RESULTS</b>In vitro transfection efficiency of plasmids and oligonucleotides were separately 85.3% ± 3.1% and 95.1% ± 2.9%. PIAS3 overexpression plasmid transfection in vitro could effectively improve the expression of PIAS3 protein in TJ905 cells and inhibit the invasion of TJ905 cells (P < 0.05), and cell penetration ratio reduced from 87.9% ± 9.3% to 37.3% ± 7.9% compared with control group, while it upregulated TIMP3 and downregulated MMP-2, MMP-9 protein expression (P < 0.05); PIAS3 siRNA transfection could inhibit the PIAS3 protein expression of TJ905 cells and promote the invasion of TJ905 cells (P < 0.05), and cell penetration ratio increased from 83.9% ± 7.1% to 93.2% ± 3.1% compared with control group, while it downregulated TIMP3 and upregulated MMP-2, MMP-9 protein expression (P < 0.05).</p><p><b>CONCLUSION</b>PIAS3 expression is closely related to the invasion properties of glioma TJ905 cells.</p>

PIAS1 interacts with the KRAB zinc finger protein, ZNF133, via zinc finger motifs and regulates its transcriptional activity

Zinc finger protein 133 (ZNF133) is composed of a Kruppel-associated box (KRAB) domain and 14 contiguous zinc finger motifs. ZNF133 is regarded as a transcriptional repressor because the KRAB domain has potent repressor activity and the zinc finger motifs usually act in binding to DNA. However, we found that the zinc finger motifs of ZNF133 also possessed transcriptional repressor activity. By two-hybrid screening assay, we found that the zinc finger motifs of ZNF133 interacted with protein inhibitor of activated STAT1 (PIAS1). PIAS1 enhanced the transcriptional repression activity of ZNF133 through the zinc finger motifs. This effect of PIAS1 was relieved by an inhibitor of the histone deacetylases (HDACs). These results demonstrate that the transcriptional repressor activity of ZNF133 is regulated by both the KRAB domain and the zinc finger motifs, and that the repressive effect by zinc finger motifs is mediated by PIAS1.

Negative Regulation of Intracellular Cytokine Signal Transduction / 대한류마티스학회지

Cytokines are secreted proteins and interact with their specific cell surface receptors, triggering intracellular signal transduction pathways that activate a number of genes crucial for the biological functions of cytokines. These cytokine signal transduction pathways are tightly regulated processes. The negative regulations of cytokine signaling are achieved by receptor internalization and degradation, dephosphorylation of signaling intermediates, expression of protein inhibitors such as suppressor of cytokine signaling (SOCS) and protein inhibitors of activated STAT (PIAS). The observation that cytokines are central to the inflammatory and destructive process in several autoimmune diseases suggests that interventions targeting the cytokine intracellular signaling will be a new therapeutic strategy in autoimmune diseases. We review the current knowledge about negative regulation of cytokine signal transduction.