On the other hand, there was a significant negative correlation of U and A in miRNA sequences from all types of murine cell-released exosomes, compared with the ambiguity of miRNA sequences form human tumor cell-derived exosomes (Figs ?(Figs5B5B and ?and6B).6B). selected from the high E value and the high E/C value groups, or the high C value group by comparing the normalized natural data of microarray, respectively. RT-qPCR was performed by Ozagrel(OKY-046) using primer-specific for the selected each miRNA. Data were expressed as the mean SD (duplicate) of the relative quantification of each miRNA.(TIF) pone.0154134.s003.tif (424K) GUID:?68480B94-C413-4396-84EA-CDA522610972 S4 Fig: Concentrated G in murine CTL-, human lymphoma- and murine macrophage-released exosome-dominant miRNA sequences. The indicated G patterns (no color in other bases and patterns) in miRNA sequences were visualized as a red color, and lined up in order from the largest amount of exosomal miRNA.(TIF) pone.0154134.s004.tif (1.7M) GUID:?ABCAA1BE-3149-4332-BE05-4D66E4286FA9 S5 Fig: Concentrated G in miRNA sequences of A549- or HCT116-released exosomes. Percentage of G, maximal continuity of G, number of continuous G and maximum G-G interval in 1023 HCT116 or 619 A549 miRNA sequences were lined up in order from the highest ratio of exosome/donor T cell miRNAs. Pearsons correlation test was performed, and the correlation coefficient (r) and p-value were calculated to confirm statistical significance of each G feature of exosome-dominant miRNA sequences.(TIF) pone.0154134.s005.tif (2.7M) GUID:?A5B0CE86-6653-4D68-8351-4D165AFA9270 S6 Fig: Statistical Ozagrel(OKY-046) anaylsis of each 4 base in CMS5a tumor-bearing BALB/c splenocyte-released exosome-dominant miRNA sequences. (A) The percentage of each base in cultured CMS5a-bearing BALB/c T cell-released exosomal miRNAs was indicated by different colors, and lined up in order from the highest value of exosomal miRNAs. (B) Pearsons correlation test was performed to confirm statistical significance of the G-rich feature of CMS5a-bearing BALB/c T cell-released exosomal miRNA sequences. The correlation coefficient (r) and p-value were calculated between the percentage of each base (U, C, A or G) and exosomal miRNA values.(TIF) pone.0154134.s006.tif (2.2M) GUID:?24F826D6-126D-407D-AEB3-7C13AB8B1C84 S1 Table: Reported tumoricidal miRNAs in exosoma-dominant miRNAs. Tumoricidal miRNAs were selected from 335 exosome-dominant miRNAs by PubMed search.(DOCX) pone.0154134.s007.docx (31K) GUID:?E107AC79-D61F-4405-840E-8964C6B59DEC S2 Table: Predicted RBPs specific for exosome-dominant ARHGAP26 miRNAs or donor human T cell-dominant miRNAs. Exosome-dominant miRNA-specific RBPs were predicted by using RBPDB database.(DOCX) pone.0154134.s008.docx (31K) GUID:?96436FF8-2134-48BA-A7A5-2A21901F8948 Data Availability StatementAll relevant data are within the paper and its Supporting Information files. Abstract Exosome is an extracellular vesicle released from multivesicular endosomes and contains micro (mi) RNAs and functional proteins derived from the donor cells. Exosomal miRNAs act as an effector during communication with appropriate recipient cells, this can aid in the utilization of the exosomes in a drug delivery system for various disorders including malignancies. Differences in the miRNA distribution pattern between exosomes and donor cells indicate the active translocation of miRNAs into the exosome cargos in a miRNA sequence-dependent manner, although the molecular mechanism Ozagrel(OKY-046) is usually little known. In this study, we statistically analyzed the miRNA microarray data and revealed that this guanine (G)-rich sequence is usually a dominant feature of exosome-dominant miRNAs, across the mammalian species-specificity and the cell types. Our results provide important information regarding the potential use of exosome cargos to develop miRNA-based drugs for the treatment of human diseases. Introduction Exosomes are extracellular vesicles, ranging in size from 40 to 150 nm in diameter, which are released Ozagrel(OKY-046) from variety cell types by the exocytotic fusion of multivesicular bodies of the endosome with the plasma membrane [1]. Proteins and lipids are the major components of exosome membranes. Proteins around the exosome membranes are thought to function as ligands for interactions with target cells. In addition, various nucleic acids, including mRNAs and microRNAs (miRNAs), are found in the exosomal lumen [1,2]. Evidence suggests that miRNAs in exosome cargos are able to modulate appropriate neighboring cells or distant recipient cells [1C3], however the exact molecular mechanisms of endocytosis and Ozagrel(OKY-046) the specific conversation between exosomes and target cells is yet to be clarified. miRNAs are small (17C24 ribonucleic acids), non-coding RNAs (located mainly within genomic introns) that regulate post-transcriptional gene silencing by binding to the 3-untranslated region (UTR) or open reading frame of target mRNAs [4]. It has been reported that miRNAs are present in body fluids including blood [5], urine [6], breast milk [7], saliva [5] and cerebrospinal fluid [8] by loading of high-density lipoproteins [9] or binding of argonaute (Ago) 2 and GW184 proteins [10,11] without packaging with exosome cargos. However, vesicle-free miRNAs are difficult to deliver to.