Comparison of protein, microRNA, and mRNA yields using different methods of urinary exosome isolation for the discovery of kidney disease biomarkers

Alvarez, M. Lucrecia; Khosroheidari, Mahdieh; Ravi, Rupesh Kanchi; DiStefano, Johanna K.

doi:10.1038/ki.2012.256

Cited by 504 publications

(454 citation statements)

References 30 publications

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“…Previous studies suggested that urinary miRNAs, like circulating miRNAs in other body fluids, are derived from tissues and cells in the presence of ongoing disease (32,33). In general, cellular miRNAs can passively leak from damaged cells or can be actively secreted into the extracellular space or circulation via the microvesicle pathway (34,35) or within HDL protein complexes (36,37).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of MicroRNAs miR-196a, miR-30a-5P, and miR-490 as Biomarkers of Disease Activity among Patients with FSGS

Zhang

Chen

et al. 2014

Clinical Journal of the American Society of Nephrology

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Background and objectives This study aimed to identify urinary microRNAs (miRNAs) as biomarkers for FSGS disease activity.Design, setting, participants, & measurements Candidate urinary miRNAs were identified in pooled urine samples from patients with active FSGS (FSGS-A) and FSGS in remission (FSGS-CR), and were then validated using individual samples. Their levels were compared both under different treatment responses in a prospective study of FSGS and in patients with different membranous nephropathy (MN) and diabetic nephropathy (DN) disease activity. The prediction of these miRNAs for treatment responses was further analyzed in both retrospective and prospective cohorts of patients with FSGS.Results All 54 miRNAs were included as candidate biomarkers, including those with high levels in patients with FSGS-A (n=9) under the TaqMan Low Density Array as well as those with conserved expression in kidneys and involved in immune response. TaqMan probe-based quantitative RT-PCR confirmed the higher levels of four miRNAs in patients with FSGS-A in two independent cohorts (n=18 and n=80). Urinary miR-196a, miR-30a-5p, and miR-490 discriminated FSGS-A from FSGS-CR, with an area under the curve of $0.80. After steroid treatment, their levels were lower in steroid-responsive patients with FSGS (all P,0.001), but were unchanged in steroid-resistant patients. The levels of miRNAs were similar between active MN and MN in remission as well as active DN and incipient DN (all P.0.05). Urinary miR-30a-5p marginally predicted the response to steroid treatment in patients with FSGS-A, with an area under the curve of 0.63 (P=0.03). ConclusionsThe levels of urinary miR-196a, miR-30a-5p, and miR-490 are associated with FSGS disease activity.

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Section: Discussionmentioning

confidence: 99%

Evaluation of MicroRNAs miR-196a, miR-30a-5P, and miR-490 as Biomarkers of Disease Activity among Patients with FSGS

Zhang

Chen

et al. 2014

Clinical Journal of the American Society of Nephrology

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“…Exosomes are small vesicles of about 40-100 nm that are secreted from cells into extracellular fluid, and are found in different bodily fluids, such blood, blood derivatives, urine, and amniotic fluid. Exosomes are produced by all cell types and have a molecular phenotype, which largely reflects that of a parent cell (43,44) The contents of exosomes reflect the origin and the physiological status of the source cells, and thus exosomal RNAs, such as DENND1A.V2, can serve as biomarkers for various diseases. These data further confirm our findings in that DENND1A.V2 mRNA is increased in PCOS, and provide the basis for a potential noninvasive diagnostic for PCOS.…”

Section: Discussionmentioning

confidence: 99%

Overexpression of a DENND1A isoform produces a polycystic ovary syndrome theca phenotype

McAllister

Modi

Miller³

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

191

157

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Polycystic ovary syndrome (PCOS), characterized by increased ovarian androgen biosynthesis, anovulation, and infertility, affects 5-7% of reproductive-age women. Genome-wide association studies identified PCOS candidate loci that were replicated in subsequent reports, including DENND1A, which encodes a protein associated with clathrin-coated pits where cell-surface receptors reside. However, these studies provided no information about functional roles for DENND1A in the pathogenesis of PCOS. DENND1A protein was located in the cytoplasm as well as nuclei of theca cells, suggesting a possible role in gene regulation. DENND1A immunostaining was more intense in the theca of PCOS ovaries. Using theca cells isolated and propagated from normal cycling and PCOS women, we found that DENND1A variant 2 (DENND1A.V2) protein and mRNA levels are increased in PCOS theca cells. Exosomal DENND1A.V2 RNA was significantly elevated in urine from PCOS women compared with normal cycling women. Forced overexpression of DENND1A.V2 in normal theca cells resulted in a PCOS phenotype of augmented CYP17A1 and CYP11A1 gene transcription, mRNA abundance, and androgen biosynthesis. Knock-down of DENND1A.V2 in PCOS theca cells reduced androgen biosynthesis and CYP17A1 and CYP11A1 gene transcription. An IgG specific to DENND1A.V2 also reduced androgen biosynthesis and CYP17 and CYP11A1 mRNA when added to the medium of cultured PCOS theca cells. We conclude that the PCOS candidate gene, DENND1A, plays a key role in the hyperandrogenemia associated with PCOS. These observations have both diagnostic and therapeutic implications for this common disorder. P olycystic ovary syndrome (PCOS) is one of the most common endocrinopathies affecting 5-7% of reproductive age women world-wide (1). PCOS is associated with hyperandrogenemia/ hyperandrogenism, anovulation, infertility, and a characteristic ovarian morphology consisting of multiple small subcortical follicular "cysts" embedded in bilaterally enlarged ovaries (2-5). The presence of elevated circulating concentrations of testosterone results primarily from increased production of androgens by the ovaries, and is a classic endocrine phenotype of women with PCOS. Although there has been debate about the diagnostic criteria for PCOS, hyperandrogenemia/hyperandrogenism and anovulation, not explained by other causes, is a hallmark of the disorder, and is included as a key element in all "consensus" diagnosis schemes (6-10).There is consensus that the ovarian theca cells are the primary source of excess androgen biosynthesis in women with PCOS (11-13). Studies on freshly isolated thecal tissue or cultures of theca cells derived from normal and PCOS women have demonstrated that PCOS theca secretes greater amounts of androgen than theca tissue or cells from regularly ovulating women (12,(14)(15)(16)(17)(18)(19). Increased androgen biosynthesis in PCOS theca cells results from increased expression of the key enzymes involved in androgen biosynthesis, steroid-17-α-hydroxylase/17,20 lyase (encoded by the CYP17...

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“…In fact, exosomes have been found as a robust source of urinary biomarkers, showing the presence after digital rectal examination of high levels of PCA3 and TMPRSS2-ERG in urinary exosomes [12]. However, no studies are currently available about miRNAs in urinary exosomes in PCa, even when they have been widely explored in benign nephropathies [119,120]. Table 4 presents published results about miRNAs in urine, showing AUCs between 0.639 and 0.769 [49,86,88,98,[121][122][123][124][125][126][127][128].…”

Section: Mirnas In Urine In Prostate Cancermentioning

confidence: 99%

miRNAs as novel biomarkers in the management of prostate cancer

Filella

Foj

2017

Clinical Chemistry and Laboratory Medicine (CCLM)

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microRNAs (miRNAs) are small non-coding RNAs that control gene expression posttranscriptionally and are part of the giant non codifying genoma. Cumulating data suggest that miRNAs are promising potential biomarkers for many diseases, including cancer. Prostate cancer (PCa) detection is currently based in the serum prostate-specific antigen biomarker and digital rectal examination. However, these methods are limited by a low predictive value and the adverse consequences associated with overdiagnosis and overtreatment. New biomarkers that could be used for PCa detection and prognosis are still needed. Recent studies have demonstrated that aberrant expressions of microRNAs are associated with the underlying mechanisms of PCa. This review attempts to extensively summarize the current knowledge of miRNA expression patterns, as well as their targets and involvement in PCa pathogenesis. We focused our review in the value of circulating and urine miRNAs as biomarkers in PCa patients, highlighting the existing discrepancies between different studies, probably associated with the important methodological issues related to their quantitation and normalization. The majority of studies have been performed in serum or plasma, but urine obtained after prostate massage appears as a new way to explore the usefulness of miRNAs. Large screening studies to select a miRNA profile have been completed, but bioinformatics tools appear as a new approach to select miRNAs that are relevant in PCa development.Promising preliminary results were published concerning miR-141, miR-375 and miR-21, but larger and prospective studies using standardized methodology are necessary to define the value of miRNAs in the detection and prognosis of PCa.

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Comparison of protein, microRNA, and mRNA yields using different methods of urinary exosome isolation for the discovery of kidney disease biomarkers

Cited by 504 publications

References 30 publications

Evaluation of MicroRNAs miR-196a, miR-30a-5P, and miR-490 as Biomarkers of Disease Activity among Patients with FSGS

Evaluation of MicroRNAs miR-196a, miR-30a-5P, and miR-490 as Biomarkers of Disease Activity among Patients with FSGS

Overexpression of a DENND1A isoform produces a polycystic ovary syndrome theca phenotype

miRNAs as novel biomarkers in the management of prostate cancer

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