Introduction
Methods
Patients, tissues, cell lines, and cultures
Variable | Value ± SD1 (%) |
---|---|
Age (years) | 63.6 ± 15.5 |
Gender (male) | 16 (69.5) |
Underlying liver disease
| 16 (69.5) |
Alcoholic liver disease | 2 (8.7) |
Cryptogenic cirrhosis | 3 (13.1) |
Hepatitis B | 3 (13.1) |
Hepatitis C | 3 (13.1) |
Nonalcoholic fatty liver disease | 5 (21.6) |
Multiple tumoral nodules
| 10 (43.5) |
Tumor size - diameter of the biggest nodule (cm) | 8.6 ± 4.3 |
Tumor grade
2
| |
Well-differentiated (G1-2) | 2 (8.7) |
Moderately-differentiated (G3) | 14 (60.9) |
Poorly-differentiated (G4) | 7 (30.4) |
UICC/AJCC
3
| |
I | 3 (13.1) |
II | 6 (26.1) |
III | 13 (56.5) |
IV | 1 (4.3) |
Generation of firefly luciferase constructs
Transfections
qRT-PCR
Gene | Primer | Sequence (5'→3') |
---|---|---|
miR-199a-5p
| RT | CTCAACTGGTGTCGTGGAGTCGGCAATTCAGTTGAGGAACAGGT |
Forward | ACACTCCAGCTGGGCCCAGTGTTCAGACTAC | |
Reverse | CTCAACTGGTGTCGTGGAGTCGGCAA | |
Probe | (6-FAM) TTCAGTTGAGGAACAGGT (MGB*) | |
RNU44
| Forward | CCTGGATGATGATAGCAAATGC |
Reverse | GGCAATTCAGTTGAGAGTCAGTTAGA | |
Probe | (6-FAM) ACTGAACATGAAGGTCTT (MGB*) | |
HMBS
(TaqMan assay) | Forward | ATGTCTGGTAACGGCAATGC |
Reverse | GTACCCACGCGAATCACTCT | |
Probe | (6-FAM) CTGCAACGGCGGAAGAAAACAGC | |
DDR1
| Forward | AATCGCAGACTTTGGCATGAG |
Reverse | CGTGAACTTCCCCATGAGGAT | |
GAPDH
| Forward | TGCACCACCAACTGCTTAGC |
Reverse | GGCATGGACTGTGGTCATGAG | |
HMBS
(SYBR Green assay) | Forward | TGCAACGGCGGAAGAAAA |
Reverse | ACGAGGCTTTCAATGTTGCC | |
HPRT1
| Forward | TGACACTGGCAAAACAATGCA |
Reverse | GGTCCTTTTCACCAGCAAGCT | |
SDHA
| Forward | TGGGAACAAGAGGGCATCTG |
Reverse | CCACCACTGCATCAAATTCATG |
Actinomycin D treatment for determination of mRNA stability
Luciferase reporter assay
Matrigel matrix invasion assay
Cell proliferation assay
Western blotting
Statistical analysis
Results
Patient demographic data
Decreased miR-199a-5p expression in human HCC tissues and cell lines
Expression of DDR1 in human HCC tissues and cell lines
Variable | AJCC/UICC stage I-II | AJCC/UICC stage III-IV | p value |
---|---|---|---|
Male gender | 66.7% | 71.4% | 0.80 |
Age (years) | 69.4 ± 8.0 | 60 ± 18.1 | 0.20 |
Multiple tumor nodules | 44.4% | 42.9% | 0.94 |
Diameter of the biggest nodule (cm) | 6.7 ± 4.4 | 9.8 ± 4.0 | 0.10 |
Viral infection | 22.2% | 28.6% | 0.73 |
Cirrhosis | 44.4% | 28.6% | 0.43 |
Poorly differentiated HCC (G4) | 0% | 50% |
0.01
|
Macrovascular invasion | 22.2% | 64.3% |
0.04
|
Mir-199a expression (median value) | 0.07 | 0.36 | 0.17 |
DDR1 expression (median value) | 1.54 | 5.05 |
0.01
|
MiR-199a-5p differentially regulates the expression of DDR1 in HepG2 and SNU-182 cells
predicted consequential pairing of target region (top) and miRNA (bottom) | |
---|---|
Position 1165-1185 of DDR1 3' UTR | 5' ...AGAAAUAUAGGAUAGACACUGGA... |
| | | | | | | | |
hsa-miR-199a-5p | 3' CUUGUCCAUCAGACUUGUGACCC |
Position 1199-1219 of DDR1 3' UTR | 5' ...GGAGCACCUGGGCCCCACUGGAC... |
| | | | | | | |
hsa-miR-199a-5p | 3' CUUGUCCAUCAGACUUGUGACCC |
Position 1260-1280 of DDR1 3' UTR | 5' ...CUCUCUCCCUGUCACACACUGGA... |
| | | | | | | | |
hsa-miR-199a-5p | 3' CUUGUCCAUCAGACUUGUGACCC |
Position 1383-1403 of DDR1 3' UTR | 5' ...CCUCCAUCACCUGAAACACUGGA... |
| | | | | | | | |
hsa-miR-199a-5p | 3' CUUGUCCAUCAGACUUGUGACCC |