{"id":1058,"date":"2026-05-27T03:16:52","date_gmt":"2026-05-27T03:16:52","guid":{"rendered":"https:\/\/wmtc2006.com\/?p=1058"},"modified":"2026-05-27T03:16:52","modified_gmt":"2026-05-27T03:16:52","slug":"the-maximum-ratio-information-from-peptide-signals-across-samples-was-extracted-intended-for-protein-label-free-quantitation","status":"publish","type":"post","link":"https:\/\/wmtc2006.com\/?p=1058","title":{"rendered":"\ufeffThe maximum ratio information from peptide signals across samples was extracted intended for protein label-free quantitation"},"content":{"rendered":"

\ufeffThe maximum ratio information from peptide signals across samples was extracted intended for protein label-free quantitation. ability of cell migration, consistent with the phenotype of Rabbit Polyclonal to AGTRL1<\/a> FOXM1 knockdown. These results suggest that new potential downstream effectors of FOXM1 were identified by proteomic approach, and may provide new potential therapeutic focuses on in breast cancer. Keywords: FOXM1, quantitative proteomic analysis, breast cancer, cell migration == Intro == Forkhead box protein M1 (FOXM1), a member of Forkhead transcription factor superfamily, is overexpressed in a Pixantrone large variety of human cancers [1] and is a key regulator of cancer pathogenesis [2, 3]. There is growing evidence that FOXM1 is required for tumor cell proliferation, differentiation, longevity, transformation and metastasis. Besides, FOXM1 overexpression also confers the potential of drug resistance to tumor cells. Studies to date have demonstrated that FOXM1 expression correlates positively with tumor grade, stage, size or incidence of metastasis in most human being tissues, including breast, liver, stomach, pancreas, etc . In breast cancer, FOXM1 has been reported to be frequently upregulated and knockdown of it leads to the inhibition of cell migration. Although some metastasis-related genes such as Slug, uPAR, MMP-2 have been identified as downstream effectors of FOXM1 [4-6], the exact mechanism and more downstream focuses on of FOXM1 on cell migration of breast cancer remains to be further elucidated. Quantitative proteomic methods, such as isotopecoded affinity tags (ICAT), stable isotope labeling Pixantrone with amino acids in cell culture and label-free quantitation (LFQ) methods, have been widely used to quantify the proteins from cells, tissues, and body fluids under diverse conditions [7]. Label-free protein quantitation methods are becoming promising and popular in shotgun datasets, for which can be applied without introducing isotopes for quantitation. Recently, this approach has been moved to a new stage with the supportive software development [8, 9]. It is encouraging that a number of studies have recognized novel focuses on or partners of specific proteins with this technology [10-12]. In the present study, label-free quantitative proteomic Pixantrone<\/a> methods were performed to identify and quantify Pixantrone all those proteins differentially expressed betweenFOXM1 knockdown breast cancer cells (MDA-MB-231\/Lv-shFOXM1) and control cells (MDA-MB-231\/Lv-shNC). A total of 4125 proteins were recognized and quantified by label-free quantitation, of which 318 proteins were significantly changed (withP-value <0. 05) between the two groups. Among them, ACSL4, CGGBP1 and PGRMC2 were identified as potential downstream focuses on of FOXM1 by Western blot. Knockdown any of the three genes attenuated the ability of cell migration in MDA-MB-231 cells through transwell chamble assays. Thus, our data provided new insights into FOXM1 function in cell migration by the potential new downstream target genes. == Materials and methods == == Cell culture and cell range == The human breast carcinoma cell range MDA-MB-231 were obtained from the American Type Culture Collection (Manassas, VA) and cultured in Dulbeccos Modified Skull cap Medium (DMEM, Corning), supplemented with 10% fetal bovine serum (FBS) and 100 units\/ml penicillin\/streptomycin in a humidified incubator in an atmosphere of 5% CO2at 37C. == RNA interference and cell transfection == The small interfering RNAs focusing on FoxM1 were designed because described previously [13]. The sequence was because follow: siFoxM1 (sense 5-CUCUUCUCCCUCAGAUAUAdTdT-3). The irrelevant nucleotides not targeting any annotated human being genes were used because negative control: siNC (sense 5-UUCUCCGAACGUGUCACGUdTdT-3). Intended for ACSL4, CGGBP1, and PGRMC2 gene silencing, the siRNAs sequences specific against these genes respectively were: siACSL4 (sense 5-GGAUAUUCUUCUCCGCUUAdTdT-3), siCGGBP1 (sense 5-CCAUGACUGUCUGAUACGUUUdTdT-3) and siPGRMC2 (sense 5-UUCUCCGAACGUGUCACGUdTdT-3). All siRNAs were chemically synthesized by GenePharma, Shanghai. Cell transfection with siRNAs was conducted using Lipofectamine 2000 (Invitrogen, USA) in accordance with the manufacturers instructions. The lentivirus knocking down FOXM1 or control (LV-shFOXM1, LV-shNC) were packaged and purchased from GenePharma, Shanghai using above corresponding sequences. == Quantitative real-time PCR analysis == Total RNA from MDA-MB-231 cells was isolated with RNAiso Plus reagent (TaKaRa, Japan), and the total RNA was reverse transcribed using the PrimeScriptTM RT Reagent Kit with gDNA Eraser (TaKaRa, Japan). Quantitative real-time reverse transcription-PCR (qRT-PCR) was performed with ABI 7500 Real Time System and SYBER green reagent (TaKaRa, Japan). Pixantrone The mRNA level of each sample was normalized to -actin prior to comparative analysis using 2-Ctmethod. The following primer pairs were used to amplify and measure the amount of FOXM1 and -actin: FOXM1-F: 5-GGGCGCACGGCGGAAGATGAA-3, FOXM1-R: 5-CCACTCTTCCAAGGGAGGGCTC-3 and actin-F: 5-CCTGGCACCCAGCACAATG-3, actin-R: 5-GGGCCGGACTCGTCATACT-3. Each sample was run in triplicate for the target gene and the internal control gene. == Western blot analysis == Standard Western blotting was performed using whole-cell protein lysates and protein concentration of cell lysates was measured. Samples were boiled for 5.\n<\/p>\n","protected":false},"excerpt":{"rendered":"

\ufeffThe maximum ratio information from peptide signals across samples was extracted intended for protein label-free quantitation. ability of cell migration, consistent with the phenotype of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[],"class_list":["post-1058","post","type-post","status-publish","format-standard","hentry","category-herg-channels"],"yoast_head":"\n\ufeffThe maximum ratio information from peptide signals across samples was extracted intended for protein label-free quantitation - Discovery and characterization of Histamine-2 Receptor Antagonists<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wmtc2006.com\/?p=1058\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\ufeffThe maximum ratio information from peptide signals across samples was extracted intended for protein label-free quantitation - 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