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Jablonska J, Pietrowska M, Ludwig S, Lang S, Thakur BK. Challenges in the Isolation and Proteomic Analysis of Cancer Exosomes-Implications for Translational Research. Proteomes 2019; 7:proteomes7020022. [PMID: 31096692 PMCID: PMC6631388 DOI: 10.3390/proteomes7020022] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 05/10/2019] [Accepted: 05/14/2019] [Indexed: 12/21/2022] Open
Abstract
Exosomes belong to the group of extracellular vesicles (EVs) that derive from various cell populations and mediate intercellular communication in health and disease. Like hormones or cytokines, exosomes released by cells can play a potent role in the communication between the cell of origin and distant cells in the body to maintain homeostatic or pathological processes, including tumorigenesis. The nucleic acids, and lipid and protein cargo present in the exosomes are involved in a myriad of carcinogenic processes, including cell proliferation, tumor angiogenesis, immunomodulation, and metastasis formation. The ability of exosomal proteins to mediate direct functions by interaction with other cells qualifies them as tumor-specific biomarkers and targeted therapeutic approaches. However, the heterogeneity of plasma-derived exosomes consistent of (a) exosomes derived from all kinds of body cells, including cancer cells and (b) contamination of exosome preparation with other extracellular vesicles, such as apoptotic bodies, makes it challenging to obtain solid proteomics data for downstream clinical application. In this manuscript, we review these challenges beginning with the choice of different isolation methods, through the evaluation of obtained exosomes and limitations in the process of proteome analysis of cancer-derived exosomes to identify novel protein targets with functional impact in the context of translational oncology.
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Affiliation(s)
- Jadwiga Jablonska
- Translational Oncology, Department of Otorhinolaryngology, University Hospital Essen, 45147 Essen, Germany.
| | - Monika Pietrowska
- Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie Institute⁻Oncology Center, Gliwice Branch, 44-100 Gliwice, Poland.
| | - Sonja Ludwig
- Translational Oncology, Department of Otorhinolaryngology, University Hospital Essen, 45147 Essen, Germany.
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Essen, 45147 Essen, Germany.
| | - Stephan Lang
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Essen, 45147 Essen, Germany.
| | - Basant Kumar Thakur
- Cancer Exosome Research Lab, Department of Pediatric Hematology and Oncology, University Hospital Essen, 45147 Essen, Germany.
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Essa AR, Browne EP, Punska EC, Perkins K, Boudreau E, Wiggins H, Anderton DL, Sibeko L, Sturgeon SR, Arcaro KF. Dietary Intervention to Increase Fruit and Vegetable Consumption in Breastfeeding Women: A Pilot Randomized Trial Measuring Inflammatory Markers in Breast Milk. J Acad Nutr Diet 2018; 118:2287-2295. [DOI: 10.1016/j.jand.2018.06.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Accepted: 06/19/2018] [Indexed: 12/20/2022]
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Qin W, Tsukasaki Y, Dasgupta S, Mukhopadhyay N, Ikebe M, Sauter ER. Exosomes in Human Breast Milk Promote EMT. Clin Cancer Res 2016; 22:4517-24. [PMID: 27060153 DOI: 10.1158/1078-0432.ccr-16-0135] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 03/27/2016] [Indexed: 11/16/2022]
Abstract
PURPOSE Pregnancy increases breast cancer risk for all women for at least 5 years after parturition. During weaning and involution, the breast microenvironment becomes tumor promotional. Exosomes provide cell-cell communication during physiologic processes such as lactation, but also in breast cancer. We determined whether molecules in milk exosomes from healthy lactating women modulate the development and progression of breast cancer. EXPERIMENTAL DESIGN Thirteen nursing women provided three (transitional, mature, and wean) milk samples. Exosomes were extracted and MCF7 and MCF10A breast cells labeled. The expression of six proteins linked to breast cancer was measured. On the basis of the findings, TGFβ2 concentration in exosome samples was measured, breast cells incubated with the exosomes and effect (epithelial-mesenchymal transition, EMT) on EMT-related proteins [E-cadherin, α-smooth muscle actin (α-SMA), filamentous (F)-actin and vimentin] measured. RESULTS Human milk exosomes entered benign and malignant breast cells. The greatest change in wean milk protein was in TGFβ2 (P = 0.01). Exosomes with a high (but not low) level of TGFβ2 led to EMT in both cancer and benign cells, based on (i) change in cell morphology, actin cytoskeleton, and loss of cell-cell junction structure and (ii) increased α-SMA and vimentin and decreased E-cadherin. CONCLUSIONS TGFβ2 is significantly upregulated in breast milk exosomes during weaning/early involution. Breast milk exosomes containing high levels of TGFβ2 induce changes in both benign and malignant breast epithelial cells, consistent with the development and progression of breast cancer, suggesting a role for high TGFβ2-expressing breast milk exosomes in influencing breast cancer risk. Clin Cancer Res; 22(17); 4517-24. ©2016 AACR.
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Affiliation(s)
- Wenyi Qin
- Department of Cellular & Molecular Biology, University of Texas Health Science Center, Tyler, Texas. Department of Surgery, University of Texas Health Science Center, Tyler, Texas
| | - Yoshikazu Tsukasaki
- Department of Cellular & Molecular Biology, University of Texas Health Science Center, Tyler, Texas
| | - Santanu Dasgupta
- Department of Cellular & Molecular Biology, University of Texas Health Science Center, Tyler, Texas
| | - Nitai Mukhopadhyay
- Department of Biostatistics, Virginia Commonwealth University, Richmond, Virginia
| | - Mitsuo Ikebe
- Department of Cellular & Molecular Biology, University of Texas Health Science Center, Tyler, Texas
| | - Edward R Sauter
- Department of Cellular & Molecular Biology, University of Texas Health Science Center, Tyler, Texas. Department of Surgery, University of Texas Health Science Center, Tyler, Texas.
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Qin W, Dasgupta S, Mukhopadhyay N, Sauter ER. Expression of the Extracellular Matrix Protein Tenascin-C Varies During Lactation. Breastfeed Med 2016; 11:86-90. [PMID: 26859615 DOI: 10.1089/bfm.2015.0153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND Women diagnosed with pregnancy-associated breast cancer postpartum have a worse prognosis, stage for stage, than other women with breast cancer. The time of breast involution is tumor promotional. The extracellular matrix protein tenascin-C is upregulated during involution in animal models and promotes breast cancer progression. It interacts with transforming growth factor (TGF)β, which also is involved in breast involution and breast cancer progression. Little is known about the expression of tenascin-C during human breast involution, nor its relationship to TGFβ. The purpose of this study was to investigate the expression of tenascin-C throughout lactation, as well as its relationship to TGFβ1 and TGFβ2. MATERIAL AND METHODOLOGY Three milk samples from 25 lactating women (transitional, whole, and wean) were collected, separated into components (cells, fat, and skim), and the skim fraction analyzed for total protein, tenascin-C, TGFβ1, and TGFβ2. Tenascin-C, TGFβ1, and TGFβ2 were detectable in all milk samples. RESULTS Highest tenascin-C levels on average were found in whole milk, whereas highest mean TGFβ1 and TGFβ2 levels were in wean milk. Wean samples on average had higher levels of both TGFβ1 (26%) and TGFβ2 (>500%) than matched transitional milk samples. Tenascin-C levels in wean milk were associated with nursing length (p = 0.048). Combining all three milk collection time points, tenascin-C exhibited a weak inverse correlation with TGFβ1 and TGFβ2 (p < 0.1). The inverse correlation at the wean time point was stronger for TGFβ2 than -1 (-0.37 versus -0.25). Tenascin-C, a protein known to promote breast cancer progression, is expressed throughout lactation. CONCLUSION The inverse correlation with TGFβ2 in wean milk suggests a possible interaction during breast involution, which should be further investigated.
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Affiliation(s)
- Wenyi Qin
- 1 Department of Surgery, University of Texas Health Science Center , Tyler, Texas
| | - Santanu Dasgupta
- 2 Department of Molecular and Cellular Biology, University of Texas Health Science Center , Tyler, Texas
| | - Nitai Mukhopadhyay
- 3 Department of Biostatistics, Virginia Commonwealth University , Richmond, Virginia
| | - Edward R Sauter
- 1 Department of Surgery, University of Texas Health Science Center , Tyler, Texas
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Yang HP, Schneider SS, Chisholm CM, Browne EP, Mahmood S, Gierach GL, Lenington S, Anderton DL, Sherman ME, Arcaro KF. Association of TGF-β2 levels in breast milk with severity of breast biopsy diagnosis. Cancer Causes Control 2015; 26:345-54. [PMID: 25604865 DOI: 10.1007/s10552-014-0498-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 11/13/2014] [Indexed: 12/18/2022]
Abstract
PURPOSE TGF-β plays a dual role in breast carcinogenesis, acting at early stages as tumor-suppressors and later as tumor-promoters. TGF-β isoforms are expressed in breast tissues and secreted in milk, suggesting that analysis of levels in milk might be informative for breast cancer risk. Accordingly, we assessed TGF-β2 levels in milk from women who had undergone a breast biopsy and related the concentrations to diagnosis. METHODS Milk donated by women who had undergone or were scheduled for a breast biopsy was shipped on ice for processing and testing. Breast cancer risk factors were obtained through a self-administered questionnaire, and biopsy diagnoses were extracted from pathology reports. TGF-β2 levels in milk, assessed as absolute levels and in relation to total protein, were analyzed in bilateral samples donated by 182 women. Linear regression was used to estimate relationships of log-transformed TGF-β2 levels and TGF-β2/ total protein ratios to biopsy category. RESULTS Milk TGF-β2 levels from biopsied and non-biopsied breasts within women were highly correlated (r (2) = 0.77). Higher mean TGF-β2 milk levels (based on average of bilateral samples) were marginally associated with more severe breast pathological diagnosis, after adjusting for duration of nursing current child (adjusted p trend = 0.07). CONCLUSIONS Our exploratory analysis suggests a borderline significant association between higher mean TGF-β2 levels in breast milk and more severe pathologic diagnoses. Further analysis of TGF-β signaling in milk may increase understanding of postpartum remodeling and advance efforts to analyze milk as a means of assessing risk of breast pathology.
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Affiliation(s)
- Hannah P Yang
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, 9609 Medical Center Drive, Room 7E-238 , Bethesda, MD, 20892, USA,
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Chollet-Hinton LS, Stuebe AM, Casbas-Hernandez P, Chetwynd E, Troester MA. Temporal trends in the inflammatory cytokine profile of human breastmilk. Breastfeed Med 2014; 9:530-7. [PMID: 25380323 PMCID: PMC4267123 DOI: 10.1089/bfm.2014.0043] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A longer lifetime duration of breastfeeding may decrease the risk of breast cancer by reducing breast inflammation and mitigating inflammatory cytokine expression during postlactational involution. However, little is known about how the inflammatory cytokine profile in human breastmilk changes over time. To study temporal trends in breastmilk cytokine expression, we measured 80 human cytokines in the whey fraction of breastmilk samples from 15 mothers at 1, 4, 8, and 12 weeks postpartum. We used mixed models to identify temporal changes in cytokine expression and investigated parity status (multiparous vs. primiparous) as a potential confounder. Nine cytokines (monocyte chemoattractant protein-1, epithelial-derived neutrophil-activating protein-78, hepatocyte growth factor, insulin-like growth factor-binding protein-1, interleukin-16, interleukin-8, macrophage colony-stimulating factor, osteoprotegerin, and tissue inhibitor of metallopeptidase-2) had significantly decreased expression with increasing breastfeeding duration; all nine have known roles in breast involution, inflammation, and cancer and may serve as biomarkers of changing breast microenvironment. No cytokine significantly increased in level over the study period. Total protein concentration significantly decreased over time (p<0.0001), which may mediate the association between length of breastfeeding and inflammatory cytokine expression. Parity status did not confound temporal trends, but levels of several cytokines were significantly higher among multiparous versus primiparous women. Our results suggest that inflammatory cytokine expression during lactation is dynamic, and expressed milk may provide a noninvasive window into the extensive biological changes that occur in the postpartum breast.
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Affiliation(s)
- Lynn S Chollet-Hinton
- 1 Department of Epidemiology, Gillings Global School of Public Health, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina
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Qin W, Zhang K, Clarke K, Sauter ER. Family history of breast cancer predicts breastmilk protein expression. Breastfeed Med 2014; 9:231-2. [PMID: 24279332 DOI: 10.1089/bfm.2013.0097] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Wenyi Qin
- 1 Department of Surgery, University of Texas Health Science Center , Tyler, Texas
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