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Table 5 Analyzing EV and its contents in PDX and PDO models

From: The functional and clinical roles of liquid biopsy in patient-derived models

Tumor type

Model

Mice

Sample

Subjects

Isolation

Analysis

Application

References

HCC

PDX

Nude mice

Plasma

EV and miRNA

TRIzol reagent for total RNA

HiSeq Rapid SR Cluster Kit V2; qRT-PCR

Diagnositic biomarker

[89]

SCLC

CDX

NSG mice

Plasma

miRNA

miRNeasy kit

qRT-PCR; Human TaqMan Low Density Arrays

Tumor burden monitoring

[90]

AML

PDX

NSG mice

Plasma

Exosome

Mini size-exclusion chromatography

Hunable resistive pulse sensing; Pierce BCA protein assay kit; Transmission electron microscopy

Mechanism of immune suppression

[88]

BC

PDX

NOD/SCID and NSG mice

Plasma

miRNA

Exoquick reagent

qRT-PCR

Potential screening biomarkers

[91]

DLBCL

PDX

NSG mice

Serum

miRNA

QIAgen miRNeasy Mini Kit

cDNA generation and ddPCR

Tumor classification

[92]

PDAC

PDX

NOD-SCID mice

Serum

EV

Centrifugation

Far-field nanoplasmon-enhanced scattering assay

Tumor burden monitoring

[93]

AML

PDX

NSG mice

Plasma

EV

Ultracentrifugation

High-resolution microscopy

NGS for miRNA

Tumor burden monitoring

[94]

HGSC

PDX

NSG mice

Serum

Protein

N-glycopeptide enrichment

Shotgun proteomics

Potential biomarkers

[95]

PDAC

PDO

N/A

Supernatants

Protein

Ultrafiltration and size exclusion chromatography

LC–MS/MS

Potential biomarkers

[96]

BC

PDO

N/A

Culture media

miRNA

miRNeasy Serum/Plasma mini kit (Qiagen)

qRT-PCR

Drug testing

[97]

CRC

PDO

N/A

Supernatants

EV

Centrifugation and ultracentrifugation

Anti-CD81-coated beads

Mechanism of tumorigenesis

[98]

PDAC

PDO

N/A

Serum-free conditioned media

EV

Centrifugation and ultracentrifugation

Anti-CD63 or anti-CD81-coated beads

Potential biomarkers of high cell proliferation rate

[99]

CRA

PDO

N/A

Conditioned media

miRNA

Ultracentrifugation for EVs

miRNeasy Mini Kit for miRNAs

Microarray analysis; qRT-PCR

Diagnostic biomarkers

[100]

PDAC

PDX PXO

Foxn1/Nu

Serum-free conditioned media

protein

Total Exosome Isolation Reagent

LC–MS/MS

Potential screening biomarkers

[101]

CRC

PDO

N/A

Conditioned media

EV

Centrifugation and ultracentrifugation

Anti-CD63 or anti-CD81-coated beads

Potential biomarkers of high cell proliferation rate

[102]

  1. EV, extracellular vesicles; miRNA, microRNA; HCC, hepatocellular cancer carcinoma; SCLC, small cell lung cancer; AML, acute myeloid leukemia; DLBCL, diffuse large B-cell lymphoma; PDAC, pancreatic ductal adenocarcinoma; HGSC, high-grade serous ovarian cancer; CRC, colorectal cancer; CRA, colorectal adenoma; BC, breast cancer; NOD, non-obese diabetic; NSG, NOD scid gamma; SCID, severe combined immunodeficient; N/A, not available; PXO, PDX-derived organoid; qRT-PCR, quantitative real time PCR; LC–MS, liquid chromatography-mass spectrometry; MS, mass spectrometry