Abstract
20–40% of lung cancer patients develop bone metastasis (BM) with significantly decreased overall survival. Currently, BM is mainly diagnosed by computerized tomography (CT) scan or magnetic resonance imaging (MRI) when symptom develops. Novel biomarkers with higher prediction value of BM are needed. Plasma-derived exosomal microRNAs had been isolated and sequenced of total 30 non-small cell lung cancer (NSCLC) patients including 16 with bone metastasis and 14 without bone metastasis. Hierarchical clustering based on the total miRNA profile can clearly separate cancer patients and healthy individuals (H), but not patients with (BM +) or without (BM−) BM. Weight Co-expression network of miRNAs (WGCNA) analyses identified three consensus clusters (A, B, C) of highly correlated miRNAs, among which cluster B (144 miRNAs) showed significantly differential expression in lung cancer patients, especially in BM + group. Pathway analysis of cluster B miRNAs revealed enrichment in metabolic pathways that may involve in preconditioning of the metastatic niche. Three differentially expressed miRNAs between BM + and BM− patients within cluster B were identified as miR-574-5p, a suppressor of Wnt/β-catenin pathway, was down-regulated, while miR-328-3p and miR-423-3p, two activators of the same pathway, were up-regulated in BM + patients. Cluster A miRNAs (n = 49) also showed trend of upregulation in BM + patients. Interestingly, pathway analysis indicated that 43 of them are associated with chromosome14, which has been suggested to promote epithelial-mesenchymal transition (EMT) and bone metastasis.
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Introduction
Lung cancer is the leading cause of cancer death worldwide and non-small cell lung cancer (NSCLC) which account for 80% of lung cancers [1] is one of the most common tumors metastasizing to bone. Bone is a common site of blood metastasis and the incidence of bone metastasis (BM) in NSCLC during disease course is about 30% to 40% [2]. In NSCLC, the 3-year overall survival ratio significantly decreases from 71.6 to 46.8% when tumor cells spread to bone [3].
Bone metastasis is a multi-steps process which exhibited a unique set of skeletal complications, including bone pain, pathologic fractures, hypercalcemia and spinal cord compression [4]. During the process, invasive tumor cells may intrude into the blood vessel as single circulating tumor cells (CTCs) which is facilitated by epithelial-mesenchymal transition (EMT) and the primary tumor microenvironment. In blood circulation, CTCs aggregate with platelets to survive and adhere to the bone marrow endothelium, and then extravasate into bone marrow parenchyma. Once the tumor cells in the bone marrow are reactivated from the dormancy state due to certain favorable situation, the micro-metastasis form and eventually lead to overt metastasis [5]. The advanced stages of bone metastasis can be classified into two different types: osteoblastic metastasis and osteolytic metastasis. In NSCLC patients, majority of cases is osteolytic bone metastasis [6, 7]. Osteolysis or bone breakdown is formed as a result of the disruption in the normal balance of bone resorption and formation and the exact mechanism is not fully understood [8].
Currently, Bone metastasis in lung cancer is mainly detected by skeletal scintigraphy, computerized tomography (CT), Positron emission tomography–computed tomography (PET-CT), magnetic resonance imaging (MRI). Skeletal scintigraphy (also named bone scan) which enables visualization of local bone turnover with labeled phosphonates showed best detection in marked reactive hypermetabolism of bone and relatively insensitive for tumors cause osteolysis which is most common in NSCLC [7]. CT is highly sensitive for both osteolytic and osteoplastic bone lesions, but less sensitive for tumors restricted to the marrow space [9]. Whole-body MRI is now the most sensitive and specific methods for the detection of bone-marrow metastases and extraosseous tumor extension. PET-CT is whole-body imaging modality based on metabolic or biochemical activity. Thus PET-CT can’t differentiate bone metastases from non-specific bone lesions [10]. The reported pooled sensitivity and specificity for the detection of bone metastasis by MRI were 90.6% and 95.4% on per-patient basis [9]. However, MRI equipment is expensive to purchase, maintain and operate. In most cases, patients were diagnosed using a combination of bone scan, CT and MRI. Therefore, novel methods with higher sensitivity and specificity are needed for quick and easy detection of bone metastasis.
MicroRNAs (miRNAs) which are small 18 to 24 nucleotides non-coding RNAs target the 3′ untranslated region of messenger RNAs (mRNAs) and regulate gene expression, resulting in mRNA cleavage or suppression of protein translation [11]. MiRNAs often located in the fragile regions of the chromosome which have a high frequency of deletions, rearrangements and amplification and have been implicated in malignancy [12]. At present, miRNAs are being studied as diagnostic and prognostic biomarkers for many cancers including NSCLC [13, 14], breast cancer [15], prostate cancer [16], hepatocellular cancer [17]. Many observations also strongly implicated the possibility of developing miRNAs as non-invasive circulating biomarker for the early detection of solid cancers [18, 19]. Plasma exosomes which can be released by most cell type especially cancer cells are small membrane vesicles with a diameter of 30–100 nm. Exosomes present in various body fluids (plasma, urine, saliva and other malignant effusions) and act as a mediator of cellular communication to transfer functional miRNAs, protein and mRNA to neighboring cells. The concentration of circulating exosomes is usually higher in cancer patients compared to healthy controls, increasing as the tumor progresses [20]. Moreover, exosomal miRNAs have been involved in the regulation of cell maturation, proliferation and differentiation and found to be potential biomarker for immunotherapy [21, 22]. MiRNAs in plasma exosomes are ideal for clinical detection for many reasons: miRNAs are very stable in body fluid. The structure of exosomes released by cells into the blood further protects miRNAs from degradation. Second, next generation sequencing has provided a highly robust and accuracy system for detection of miRNAs in body fluid on a genome-wide scale [23]. In this study, we focus on the miRNAs in plasma-derive exosomes to investigate the potential of using miRNAs as biomarkers for early detection of bone metastasis in NSCLC patients.
Methods
Patients and clinical sample collection
A total of 30 EGFR/ALK positive NSCLC patients were enrolled in this study including sixteen phase IV patients with bone metastasis and fourteen phase IV patients without bone metastasis (Supplementary Table 1). Among them, 25 patients (83%) were diagnosed with adenocarcinoma (ADC). The median age at diagnosis is 55, ranging from 35 to 78. There were nine males (30%), 20 (67%) females and one unknown sex type. Four patients (13%) were Stage IVa NSCLC and 26 patients (87%) were Stage IVb NSCLC. Three patients (10%) were smokers and 14 patients (47%) were never-smokers. The smoking history was unavailable in thirteen patients. Peripheral blood was collected from each patient on a regular basis from routine clinical care, and plasma sample was prepared within 2 h of blood drawn and then stored at − 80 °C. Additionally, plasma samples from 14 healthy donors were collected as control group.
Plasma exosome isolation
1 mL of plasma sample was centrifuged at 10,000×g for 30 min at 4 °C to remove any cell debris. The collected supernatant was then subjected for ultra-highspeed centrifugation at 150,000×g for 70 min at 4 °C. Pellet containing exosome was resuspended in 200 μL PBS for downstream applications. Western blot characterization of exosome preparation was shown in Supplementary Figure S1. The presence of exosomal markers, CD63 and CD9, was confirmed by western blot.
Exosomal RNA isolation and small RNA sequencing
Total RNA including miRNA was extracted from plasma-derived exosome using miRNeasy Serum/Plasma Kit (QIAGEN) following manufacturer’s instructions. The quantification and size distribution of the extraction were analyzed by Qubit 4.0 and Agilent Bioanalyzer 2100 (Agilent), respectively. Quantified miRNA was subjected for sequencing library preparation using NEBNext® Small RNA Library Prep Set for Illumina® (NEB Biolabs) following manufacturer’s instructions. Briefly, isolated miRNA was subjected for 3′ and 5′ adaptor ligation, followed by 17 cycles of PCR amplification. PCR products from library preparation were subjected for gel electrophoresis on 6% Novex® TBE PAGE gel (Thermo Fisher Scientific) and DNA fragments between 140 and 150 bp were recovered from the gel. Purified miRNA cDNA library was quantified by Qubit 4.0 and the size distribution was analyzed on Agilent Bioanalyzer 2100. miRNA cDNA libraries from different plasma samples were pooled and sequenced on Illumina HiSeq4000 platform.
miRNA-seq data analysis
miRNA identification and reads counting in each miRNA were performed using miRDeep2 [24]. After trimming the 3′ adaptor sequence, all sequences ranging in length from 18 to 26 nt were recorded in a non-redundant file along with reads count. To identify known miRNAs, the miRNA tags were aligned against miRNA precursor sequences reported in the miRNA database ‘miRBase’ (release 21) using the ‘quantifier.pl’ script within miRDeep2. Differential expression (DE) analysis of miRNA sequence data was performed with the Bioconductor package edgeR [25]. miRNAs with read counts per million mapped reads (CPM) ≥ 2 in at least 20% of all samples were identified as expressed miRNAs. DE between different groups was evaluated by fitting a negative binomial generalized linear model and then adjusting the P-value for multiple testing using the Benjamini–Hochberg correction with a false discovery rate of 0.1 and a minimum log2(CPM) of 4.
Weight co-expression networks
Weight co-expression network of miRNAs was performed in accordance to the protocol of WGCNA package in the R language [26]. MiRNAs were aggregated into modules by hierarchical clustering and refined by the dynamic tree cut algorithm. Thereafter, module eigenvalues were calculated. The eigenvalue is the first principal component of the miRNA expression profile within a module, representing average module expression profile. The statistical significance of module eigenvalues among the groups was accessed by Kruskal–Wallis test.
Result
NSCLC patients exhibited a unique miRNA profile compared to healthy population
In this retrospective study, 37 plasma samples were subjected for exosome purification and miRNA-seq. Among them, 23 samples were from 16 phase IV patients with bone metastasis (BM+) and 14 samples from 14 phase IV patients without bone metastasis (BM−). Raw reads of miRNA-seq from plasma samples were normalized to counts per million (CPM) and 1287 miRNAs were retained as expressed miRNAs in plasma exosomes (Supplementary Table 2). Using exact test, 91 miRNAs were identified as differentially expressed miRNAs (DE miRNAs) between H and C including 71 up-regulated miRNAs and 20 down-regulated miRNAs in patient group (Supplementary Table 3). Based on the DE exosomal miRNA profile, samples of healthy individuals (H) could be separated from samples of NSCLC patients (C) using supervised hierarchy clustering (Supplementary Figure S2). All these data proved that NSCLC patients exhibited a unique miRNA profile compared to healthy population.
Detection of co-expression clusters in exosomal miRNAs
To characterize the correlation pattern and predict the function of miRNAs, we applied weighed gene co-expression network analysis (WGCNA) to the 1287 miRNAs detected in the plasma exosomes. WGCNA is widely used in genomic data analysis which can detect clusters of highly correlated genes based on pairwise correlations [26]. As shown in Supplementary Figure S3, we identified three clusters of co-expressed miRNAs which were represented by different color codes (Brown: cluster A; Turquoise: cluster B; Blue: cluster C). Cluster B had 144 miRNAs which is the largest cluster among three. 49 miRNAs were assorted into Cluster A while 95 miRNAs were in Cluster C (Supplementary Table 4).
Furthermore, BM+ group showed significant up-regulation in cluster B eigengene value compared to healthy population and BM− group which suggested miRNAs in cluster B might related to the initial of bone metastasis (Fig. 1b). The 144 miRNAs from cluster B basically differentiated BM + group from BM− group using unsupervised clustering which also shed light on the function of the miRNA cluster in bone metastasis (Fig. 2a). We performed pathway analysis of the 144 miRNAs in cluster B using miRNA enrichment analysis and annotation (MiEAA) [27] and top 20 miRNA pathways were shown in Table 1. Interestingly, cluster B was enriched in metabolism processes such as pyruvate metabolism (p = 0.010575), glycolysis and gluconeogenesis (p = 0.014983), purine metabolism (p = 0.014983), propanoate metabolism (p = 0.014983) and pyrimidine metabolism (p = 0.027086) (Supplementary Table 5).
In cluster A, BM + group exhibited a trend of increase in eigengene value compared to healthy population and BM− group (Fig. 1a). miRNA enrichment analysis was done with 49 miRNAs in cluster A, however, not many related pathway was found. Nevertheless, we discovered that 43 out of 49 cluster A miRNAs were expressed by chromosome 14 (Supplementary Table 6).
In cluster C, the eigengene values were comparable within healthy population group, BM+ and BM− group (Fig. 1c) which indicated that this cluster was not related to bone metastasis. The cluster A miRNAs failed to differ BM + from BM− with unsupervised clustering in Fig. 2b also suggested that cluster C miRNAs were not involve in the bone metastasis. Related pathways of cluster C were shown in Supplementary Table 7. miRNAs in cluster C seemed to related to all kinds of signaling pathways including cell cycle (p = 0.000322), proteasome and lysosome (p = 0.000322), p53 signaling pathway (p = 0.00037), insulin signaling pathway (p = 0.000322) and Ras pathway(p = 0.00037).
Identified differentially expressed miRNAs between BM + and BM− group as potential biomarker for bone metastasis
Using exact test, we were able to identify differentially expressed miRNAs between BM + and BM− group. With cut off at logCPM > 4, p < 0.05, False Discovery Rate (FDR) ≤ 0.1, majority of miRNAs were excluded except hsa-miR-574-5p, hsa-miR-328-3p and hsa-miR-423-3p (Table 2). The CPM of three miRNAs in each group was shown in Fig. 3. Hsa-miR-574-5p was significantly down-regulated in BM + (Fig. 3a). Hsa-miR-328-3p and hsa-miR-423-3p were significantly up-regulated in BM + compared to BM− group (Fig. 3b, c). More importantly, the three DE miRNAs we identified, hsa-miR-574-5p, hsa-miR-328-3p and hsa-miR-423-3p, all belonged to the cluster B which is related with bone metastasis (Supplementary Table 3, Turquoise). These DE miRNAs might regulate cancer metastasis through Wnt/β-catenin signaling pathway and might be potential biomarker for bone metastasis in NSCLC.
Discussion
In this retrospective study, we analyzed the plasma-derived exosomal miRNAs from stage IV NSCLC patients with or without bone metastasis. A total of 1287 miRNAs were identified and assorted into three major clusters A, B, C by WGCNA. Cluster A had a trend of increase in BM+ group compared to BM− and majority of cluster A miRNAs was transcripted by chromosome14. Cluster B showed significant difference between BM+ and BM− and the three DE miRNAs (hsa-miR-574-5p, hsa-miR-328-3p and hsa-miR-423-3p) identified between BM+ and BM− belonged to cluster B as well. Pathway analysis revealed that cluster B miRNAs were mostly related to metabolism processes. Hsa-miR-574-5p, hsa-miR-328-3p and hsa-miR-423-3p were reported actively involved in the Wnt/β-catenin signaling pathway and might be candidates as biomarkers for bone metastasis in NSCLC patients. Cluster C showed no difference among healthy population, BM+ and BM−, thus was not relate to bone metastasis in lung cancer.
The metabolic processes we found associated with cluster B miRNAs were highly associated with tumor metastasis. In general, metabolism changes often accompany tumor progression and were known to be associated with establishment of metastatic niches which are preconditioned for the arrival of metastatic disseminated cancer cells [28]. On the other hand, cancer cells undergo metabolic alteration and acquire metastatic traits to adapt to multiple environments. Upregulation of glycolysis [29], pyruvate kinase [30], pyrimidine phosphorylase [31] was observed in many cancers and played important role in tumor metastasis and aggressiveness. Recently, purine signaling pathway has been reported to contribute to the bone marrow metastasis in neuroblastoma [32]. All these evidences supported our finding that cluster B was metastatically relevant.
Wnt/β-catenin signaling pathway plays an important role in the epithelial-to-mesenchymal transition (EMT) and contribute to cancer progression and metastasis in different types of malignancies. MiRNAs are the major regulators of Wnt/β-catenin signaling pathway which make them ideal for therapeutic targets against metastatic tumor [33]. Here, we reported three differential expressed miRNAs which might be signatures for bone metastasis in NSCLC. Intriguingly, hsa-miRNA-574-5p, a suppressor of Wnt/β-catenin signaling pathway, has been reported to promote metastasis of NSCLC [34]. Moreover, hsa-miR-574-5p was also found to be highly related to development and metastasis of other cancer including thyroid cancer [35], colorectal cancer [36, 37] and breast cancer [38]. Both hsa-miR-328-3p and hsa-miR-423-3p were reported as activators in Wnt/β-catenin signaling pathway and promoted cancer cell invasion and metastasis in advanced non-small cell lung cancer [39] and colorectal cancer [40]. Meanwhile, hsa-miR-328 was implicated in the high glucose-induced EMT [41] and hsa-miR-423-3p was considered as potential biomarker for lung cancer diagnosis [42]. These three miRNAs might act together through Wnt/β-catenin pathway to promote EMT and could be unique makers for bone metastasis in lung cancer. The detection of these miRNA biomarkers in plasma exosomes has the potential to become a specific, sensitive and non-invasive method for monitoring bone metastasis in clinical setting for it only require blood sample which is easy to obtain. Although the miRNA profile from healthy donors and strict cutoffs have been employed to better screen for bone-metastasis-related miRNA, further studies and validation are warranted to address the role of these BM-associated miRNAs as biomarkers or therapeutic targets for advanced NSCLC patients. Meanwhile, a comparison of plasma exosomal miRNA profiles from lung cancer patients with different metastatic location would also be of great interest to validate the specificity of these miRNA biomarkers. However, we have not found any related online database thus far. Long-term monitoring of potential exosomal miRNA biomarkers as well as the study of metastatic location-related exosomal miRNA profile are warranted to further address these unanswered questions.
Overall, the 43 miRNAs from cluster A which were transcripted by chromosome 14 showed increasing expression in BM+ group. One possibility of this increase in BM+ might due to amplification of chromosome 14 in stage IV patients with bone metastasis. However, ctDNA or tumor samples from patients were not available for copy number variation detection to confirm this hypothesis. So far, chromosome 14 amplification was not reported in NSCLC or other cancers. But there was study on chromosome 14 allelic loss which is common in nasopharyngeal carcinoma and essential tumor suppressor gene loss in tumorigenesis [43].
To sum up, by comparing the plasma-derived exosomal miRNA features of NSCLC patients with or without bone metastasis, we identified a cluster of bone-metastasis related miRNAs and three DE miRNAs which might be applied to prediction of bone metastasis in NSCLC patients in future.
Data availability
All data analyzed during this study are included either in this article or in the additional files.
References
Chen Z et al (2014) Non-small-cell lung cancers: a heterogeneous set of diseases. Nat Rev Cancer 14(8):535–546
Rosen LS et al (2004) Long-term efficacy and safety of zoledronic acid in the treatment of skeletal metastases in patients with nonsmall cell lung carcinoma and other solid tumors: a randomized, Phase III, double-blind, placebo-controlled trial. Cancer 100(12):2613–2621
Wang H et al (2017) Risk factors for bone metastasis in completely resected non-small-cell lung cancer. Future Oncol 13(8):695–704
Coleman RE (2006) Clinical features of metastatic bone disease and risk of skeletal morbidity. Clin Cancer Res Off J Am Assoc Cancer Res 12(20 Pt 2):6243s–6249s
Zhang W et al (2019) Bone metastasis: find your niche and fit in. Trends Cancer 5(2):95–110
Mundy GR (2002) Metastasis to bone: causes, consequences and therapeutic opportunities. Nat Rev Cancer 2(8):584–593
Heindel W et al (2014) The diagnostic imaging of bone metastases. Dtsch Arztebl Int 111(44):741–747
Kuchuk M et al (2013) Incidence and consequences of bone metastases in lung cancer patients. J Bone Oncol 2(1):22–29
Yang HL et al (2011) Diagnosis of bone metastases: a meta-analysis comparing (1)(8)FDG PET, CT MRI and bone scintigraphy. Eur Radiol 21(12):2604–2617
Wu H et al (2020) Clinical utility of dual-energy CT used as an add-on to 18F FDG PET/CT in the preoperative staging of resectable NSCLC with suspected single osteolytic metastases. Lung Cancer 140:80–86
Shen J, Stass SA, Jiang F (2013) MicroRNAs as potential biomarkers in human solid tumors. Cancer Lett 329(2):125–136
Croce CM (2009) Causes and consequences of microRNA dysregulation in cancer. Nat Rev Genet 10(10):704–714
Xie Y et al (2010) Altered miRNA expression in sputum for diagnosis of non-small cell lung cancer. Lung Cancer 67(2):170–176
Saito M et al (2011) The association of microRNA expression with prognosis and progression in early-stage, non-small cell lung adenocarcinoma: a retrospective analysis of three cohorts. Clin Cancer Res Off J Am Assoc Cancer Res 17(7):1875–1882
Roth C et al (2010) Circulating microRNAs as blood-based markers for patients with primary and metastatic breast cancer. Breast Cancer Res BCR 12(6):R90
Mahn R et al (2011) Circulating microRNAs (miRNA) in serum of patients with prostate cancer. Urology 77(5):1265 e9
Borel F, Konstantinova P, Jansen PL (2012) Diagnostic and therapeutic potential of miRNA signatures in patients with hepatocellular carcinoma. J Hepatol 56(6):1371–1383
Yanaihara N et al (2006) Unique microRNA molecular profiles in lung cancer diagnosis and prognosis. Cancer Cell 9(3):189–198
Iorio MV et al (2005) MicroRNA gene expression deregulation in human breast cancer. Cancer Res 65(16):7065–7070
Taylor DD, Gercel-Taylor C (2008) MicroRNA signatures of tumor-derived exosomes as diagnostic biomarkers of ovarian cancer. Gynecol Oncol 110(1):13–21
Li J et al (2013) Exosomes mediate the cell-to-cell transmission of IFN-alpha-induced antiviral activity. Nat Immunol 14(8):793–803
Peng XX et al (2020) Correlation of plasma exosomal microRNAs with the efficacy of immunotherapy in EGFR/ALK wild-type advanced non-small cell lung cancer. J Immunother Cancer 8(1):e000376
Metzker ML (2010) Sequencing technologies—the next generation. Nat Rev Genet 11(1):31–46
Friedlander MR et al (2012) miRDeep2 accurately identifies known and hundreds of novel microRNA genes in seven animal clades. Nucleic Acids Res 40(1):37–52
Robinson MD, McCarthy DJ, Smyth GK (2010) edgeR: a Bioconductor package for differential expression analysis of digital gene expression data. Bioinformatics 26(1):139–140
Langfelder P, Horvath S (2008) WGCNA: an R package for weighted correlation network analysis. BMC Bioinform 9:559
Backes C et al (2016) miEAA: microRNA enrichment analysis and annotation. Nucleic Acids Res 44(W1):W110–W116
Peinado H et al (2017) Pre-metastatic niches: organ-specific homes for metastases. Nat Rev Cancer 17(5):302–317
Altenberg B, Greulich KO (2004) Genes of glycolysis are ubiquitously overexpressed in 24 cancer classes. Genomics 84(6):1014–1020
Ogawa H et al (2015) The combination of the expression of hexokinase 2 and pyruvate kinase M2 is a prognostic marker in patients with pancreatic cancer. Mol Clin Oncol 3(3):563–571
Mimori K et al (1999) Up-regulated pyrimidine nucleoside phosphorylase in breast carcinoma correlates with lymph node metastasis. Ann Oncol Off J Eur Soc Med Oncol 10(1):111–113
Ulrich H et al (2018) Kinin and purine signaling contributes to neuroblastoma metastasis. Front Pharmacol 9:500
Ghahhari NM, Babashah S (2015) Interplay between microRNAs and WNT/beta-catenin signalling pathway regulates epithelial-mesenchymal transition in cancer. Eur J Cancer 51(12):1638–1649
Zhou R et al (2016) MicroRNA-574-5p promotes metastasis of non-small cell lung cancer by targeting PTPRU. Sci Rep 6:35714
Zhang Z et al (2018) MiR-574-5p mediates the cell cycle and apoptosis in thyroid cancer cells via Wnt/beta-catenin signaling by repressing the expression of Quaking proteins. Oncol Lett 15(4):5841–5848
Cui Z et al (2014) Hsa-miR-574-5p negatively regulates MACC-1 expression to suppress colorectal cancer liver metastasis. Cancer Cell Int 14:47
Ji S et al (2013) miR-574–5p negatively regulates Qki6/7 to impact beta-catenin/Wnt signalling and the development of colorectal cancer. Gut 62(5):716–726
Wang PS et al (2018) A novel long non-coding RNA linc-ZNF469–3 promotes lung metastasis through miR-574–5p-ZEB1 axis in triple negative breast cancer. Oncogene 37(34):4662–4678
Sun D et al (2015) The predictive value and potential mechanisms of miRNA-328 and miRNA-378 for brain metastases in operable and advanced non-small-cell lung cancer. Jpn J Clin Oncol 45(5):464–473
Jia W et al (2018) Association of microRNA-423 rs6505162 C>A polymorphism with susceptibility and metastasis of colorectal carcinoma. Medicine 97(6):e9846
Chen Y et al (2018) The role of miR-328 in high glucose-induced endothelial-to-mesenchymal transition in human umbilical vein endothelial cells. Life Sci 207:110–116
Zhu Y et al (2017) Identification of a serum microRNA expression signature for detection of lung cancer, involving miR-23b, miR-221, miR-148b and miR-423-3p. Lung Cancer 114:6–11
Cheung AK et al (2009) Chromosome 14 transfer and functional studies identify a candidate tumor suppressor gene, mirror image polydactyly 1, in nasopharyngeal carcinoma. Proc Nat Acad Sci USA 106(34):14478–14483
Acknowledgements
The authors thank the donors who provided their blood samples.
Funding
This research was funded by National Key R&D Program of China (Grant No. 2016YFC1303800 to QZ), National Natural Science Foundation of China (Grant No. 81871891 to QZ), and High-level Hospital Construction Project (Grant No. DFJH201810 to QZ).
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Conceptualization, X-RY; methodology, RY and CP; software, YWS; validation, X-RY and RY; formal analysis, RY and X-JF; investigation, X-RY, X-XP and CP; resources, Z-HC; data curation, X-JF and XW; writing—original draft preparation, RY, X-RY and CP; writing—review and editing, Y-LW, QZ, X-CZ and RY; visualization, X-JF and XW; supervision, Y-LW, QZ and X-CZ; project administration, QZ and Z-HC; funding acquisition, QZ. All authors have read and agreed to the published version of the manuscript.
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Yang W Shao, Xue Wu, Ruoying Yu and XiaoJun Fan are the shareholders or employees of Geneseeq Technology Inc. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.
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This study and its informed consent have been examined and certified by the Ethics Committee of the Guangdong Provincial People’s Hospital.
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Online Resource 1. Figure S1: Plasma-derived exosomal miRNAs separated healthy control samples from EGFR/ALK positive NSCLC patient samples, Figure S2: Cluster dendrogram was generated by hierarchical clustering based on dissimilarity measure of genes. Supplementary file1 (DOCX 209 KB)
10585_2020_10062_MOESM2_ESM.xlsx
Online Resource 2. Table S1: clinicopathological information of patients enrolled. Table S2:Raw reads of miRNA-seq from plasma samples were normalized to counts per million (CPM) and 1287 miRNAs were retained as expressed miRNAs in plasma exosomes, Table S3: 91 differentially expressed miRNAs between healthy population and EGFR/ALK positive NSCLC patient, Table S4: The miRNAs assorted into each cluster using WGCNA, Table S5: Pathway analysis of 144 miRNAs from Cluster B, Table S6: Pathway analysis of 49 miRNAs from Cluster A, Table S7: Pathway analysis of 95 miRNAs from Cluster C. Supplementary file2 (XLSX 614 KB)
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Yang, XR., Pi, C., Yu, R. et al. Correlation of exosomal microRNA clusters with bone metastasis in non-small cell lung cancer. Clin Exp Metastasis 38, 109–117 (2021). https://doi.org/10.1007/s10585-020-10062-y
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DOI: https://doi.org/10.1007/s10585-020-10062-y