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Facile preparation of salivary extracellular vesicles for cancer proteomics.

Sun Y, Xia Z, Shang Z, Sun K, Niu X, Qian L, Fan LY, Cao CX, Xiao H - Sci Rep (2016)

Bottom Line: Affinity chromatography column combined with filter system (ACCF) was developed to efficiently remove the high abundant proteins and viscous interferences of saliva.Protein profiling in the SEVs obtained by this strategy was compared with conventional centrifugation method, which demonstrated that about 70% more SEVs proteins could be revealed.Our results demonstrated that SEVs prepared through the developed strategy are valuable samples for proteomics and could serve as a promising liquid biopsy for cancer.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Microbial Metabolism, Laboratory of Analytical Biochemistry and Bioseparation, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China.

ABSTRACT
Extracellular vesicles (EVs) are membrane surrounded structures released by cells, which have been increasingly recognized as mediators of intercellular communication. Recent reports indicate that EVs participate in important biological processes and could serve as potential source for cancer biomarkers. As an attractive EVs source with merit of non-invasiveness, human saliva is a unique medium for clinical diagnostics. Thus, we proposed a facile approach to prepare salivary extracellular vesicles (SEVs). Affinity chromatography column combined with filter system (ACCF) was developed to efficiently remove the high abundant proteins and viscous interferences of saliva. Protein profiling in the SEVs obtained by this strategy was compared with conventional centrifugation method, which demonstrated that about 70% more SEVs proteins could be revealed. To explore its utility for cancer proteomics, we analyzed the proteome of SEVs in lung cancer patients and normal controls. Shotgun proteomic analysis illustrated that 113 and 95 proteins have been identified in cancer group and control group, respectively. Among those 63 proteins that have been consistently discovered only in cancer group, 12 proteins are lung cancer related. Our results demonstrated that SEVs prepared through the developed strategy are valuable samples for proteomics and could serve as a promising liquid biopsy for cancer.

No MeSH data available.


Related in: MedlinePlus

Particle size and distribution of the SEVs obtained by primordial saliva (A) and purified saliva sample using ACCF system (B).
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f3: Particle size and distribution of the SEVs obtained by primordial saliva (A) and purified saliva sample using ACCF system (B).

Mentions: Nanoparticle tracking analysis was used to evaluate the size distribution of SEVs. The results are shown in Fig. 3. The SEVs size in primordial saliva and purified saliva sample using ACCF system was both smaller than 1,000 nm. However, for SEVs prepared from conventional centrifugation method, the particle size ranged from 109 nm to 660 nm, while for SEVs prepared through ACCF method, the diameter ranged from 99 nm to 944 nm.


Facile preparation of salivary extracellular vesicles for cancer proteomics.

Sun Y, Xia Z, Shang Z, Sun K, Niu X, Qian L, Fan LY, Cao CX, Xiao H - Sci Rep (2016)

Particle size and distribution of the SEVs obtained by primordial saliva (A) and purified saliva sample using ACCF system (B).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4835767&req=5

f3: Particle size and distribution of the SEVs obtained by primordial saliva (A) and purified saliva sample using ACCF system (B).
Mentions: Nanoparticle tracking analysis was used to evaluate the size distribution of SEVs. The results are shown in Fig. 3. The SEVs size in primordial saliva and purified saliva sample using ACCF system was both smaller than 1,000 nm. However, for SEVs prepared from conventional centrifugation method, the particle size ranged from 109 nm to 660 nm, while for SEVs prepared through ACCF method, the diameter ranged from 99 nm to 944 nm.

Bottom Line: Affinity chromatography column combined with filter system (ACCF) was developed to efficiently remove the high abundant proteins and viscous interferences of saliva.Protein profiling in the SEVs obtained by this strategy was compared with conventional centrifugation method, which demonstrated that about 70% more SEVs proteins could be revealed.Our results demonstrated that SEVs prepared through the developed strategy are valuable samples for proteomics and could serve as a promising liquid biopsy for cancer.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Microbial Metabolism, Laboratory of Analytical Biochemistry and Bioseparation, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China.

ABSTRACT
Extracellular vesicles (EVs) are membrane surrounded structures released by cells, which have been increasingly recognized as mediators of intercellular communication. Recent reports indicate that EVs participate in important biological processes and could serve as potential source for cancer biomarkers. As an attractive EVs source with merit of non-invasiveness, human saliva is a unique medium for clinical diagnostics. Thus, we proposed a facile approach to prepare salivary extracellular vesicles (SEVs). Affinity chromatography column combined with filter system (ACCF) was developed to efficiently remove the high abundant proteins and viscous interferences of saliva. Protein profiling in the SEVs obtained by this strategy was compared with conventional centrifugation method, which demonstrated that about 70% more SEVs proteins could be revealed. To explore its utility for cancer proteomics, we analyzed the proteome of SEVs in lung cancer patients and normal controls. Shotgun proteomic analysis illustrated that 113 and 95 proteins have been identified in cancer group and control group, respectively. Among those 63 proteins that have been consistently discovered only in cancer group, 12 proteins are lung cancer related. Our results demonstrated that SEVs prepared through the developed strategy are valuable samples for proteomics and could serve as a promising liquid biopsy for cancer.

No MeSH data available.


Related in: MedlinePlus