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2018 ; 17
(1
): 97
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Transcriptome reprogramming by cancer exosomes: identification of novel molecular
targets in matrix and immune modulation
#MMPMID30008265
Qadir F
; Aziz MA
; Sari CP
; Ma H
; Dai H
; Wang X
; Raithatha D
; Da Silva LGL
; Hussain M
; Poorkasreiy SP
; Hutchison IL
; Waseem A
; Teh MT
Mol Cancer
2018[Jul]; 17
(1
): 97
PMID30008265
show ga
BACKGROUND: Exosomes are extracellular vesicles released by almost all cell
types, including cancer cells, into bodily fluids such as saliva, plasma, breast
milk, semen, urine, cerebrospinal fluid, amniotic fluid, synovial fluid and
sputum. Their key function being intercellular communication with both
neighbouring as well as distant cells. Cancer exosomes have been shown to
regulate organ-specific metastasis. However, little is known about the functional
differences and molecular consequences of normal cells responding to exosomes
derived from normal cells compared to those derived from cancer cells. METHODS:
Here, we characterised and compared the transcriptome profiles of primary human
normal oral keratinocytes (HNOK) in response to exosomes isolated from either
primary HNOK or head and neck squamous cell carcinoma (HNSCC) cell lines.
RESULTS: In recipient HNOK cells, we found that regardless of normal or cancer
derived, exosomes altered molecular programmes involved in matrix modulation
(MMP9), cytoskeletal remodelling (TUBB6, FEZ1, CCT6A), viral/dsRNA-induced
interferon (OAS1, IFI6), anti-inflammatory (TSC22D3), deubiquitin (OTUD1), lipid
metabolism and membrane trafficking (BBOX1, LRP11, RAB6A). Interestingly, cancer
exosomes, but not normal exosomes, modulated expression of matrix remodelling
(EFEMP1, DDK3, SPARC), cell cycle (EEF2K), membrane remodelling (LAMP2, SRPX),
differentiation (SPRR2E), apoptosis (CTSC), transcription/translation (KLF6,
PUS7). We have also identified CEP55 as a potential cancer exosomal marker.
CONCLUSIONS: In conclusion, both normal and cancer exosomes modulated unique gene
expression pathways in normal recipient cells. Cancer cells may exploit exosomes
to confer transcriptome reprogramming that leads to cancer-associated pathologies
such as angiogenesis, immune evasion/modulation, cell fate alteration and
metastasis. Molecular pathways and biomarkers identified in this study may be
clinically exploitable for developing novel liquid-biopsy based diagnostics and
immunotherapies.
|Biomarkers, Tumor/genetics
[MESH]
|Cell Cycle Proteins/*genetics
[MESH]
|Cell Line, Tumor
[MESH]
|Exosomes/*genetics/pathology
[MESH]
|Forkhead Box Protein M1/genetics
[MESH]
|Gene Expression Profiling/*methods
[MESH]
|Gene Expression Regulation, Neoplastic
[MESH]
|Head and Neck Neoplasms/*genetics/pathology
[MESH]