Background
Methods
Study population
Clinicopathological parameters | No. patients (%) |
---|---|
Total
| 112 |
Gender
| |
male | 65 (58.0) |
female | 47 (42.0) |
Age (years)
| |
≤64 | 57 (50.9) |
>64 | 55 (49.1) |
Tumour stage
| |
pT1 | 73 (65.2) |
pT2 | 14 (12.5) |
pT3 | 22 (19.6) |
pT4 | 3 (2.7) |
Tumour grade
| |
G1 | 5 (4.5) |
G2 | 63 (56.3) |
G3 | 35 (31.2) |
G4 | 9 (8.0) |
Lymph node status
| |
positive | 6 (5.4) |
negative | 106 (94.6) |
Disease-specific death (DSS)
| |
alive | 91 (81.2) |
died of ccRCC | 21 (18.8) |
Death of any cause (OS)
| |
alive | 74 (66.1) |
died of any cause | 38 (33.9) |
Determination of tissue antigen levels by ELISA
Statistical analyses
Results
Comparison of uPA system component levels in corresponding malignant and non-malignant tissue specimens of ccRCC patients
Association of uPA system component levels in tumour tissue with clinicopathological parameters of ccRCC patients
Clinicopathological parameters | No. patients | uPAa
| uPARa
| PAI-1a
|
---|---|---|---|---|
Total
| 112 | 0.41 (0.4) | 0.51 (0.7) | 10.31 (20.7) |
Gender
b
|
P = 0.002 |
P = 0.065 |
P = 0.056 | |
male | 65 | 0.47 (0.6) | 0.60 (0.7) | 12.58 (29.1) |
female | 47 | 0.30 (0.3) | 0.42 (0.5) | 7.18 (13.9) |
Age (years)
b
|
P = 0.117 |
P = 0.029 |
P = 0.242 | |
≤64 | 57 | 0.36 (0.3) | 0.43 (0.4) | 8.98 (13.4) |
>64 | 55 | 0.46 (0.7) | 0.63 (0.7) | 11.74 (54.7) |
Tumour stage
b
|
P = 0.003 |
P = 0.021 |
P = 0.010 | |
pT1+2 | 87 | 0.36 (0.3) | 0.47 (0.5) | 8.33 (14.0) |
pT3+4 | 25 | 0.63 (0.9) | 0.81 (1.4) | 18.05 (62.3) |
Tumour grade
b
|
P = 0.122 |
P = 0.008 |
P = 0.011 | |
G1+2 | 68 | 0.40 (0.3) | 0.43 (0.5) | 7.83 (12.8) |
G3+4 | 44 | 0.43 (0.9) | 0.68 (1.1) | 14.57 (62.9) |
Disease-specific survival
b
|
P = 0.220 |
P = 0.002 |
P = 0.007 | |
alive | 91 | 0.37 (0.4) | 0.46 (0.5) | 7.91 (14.4) |
died of ccRCC | 21 | 0.50 (0.7) | 0.94 (0.8) | 16.08 (65.0) |
Overall survival
b
|
P = 0.568 |
P = 0.013 |
P = 0.037 | |
alive | 74 | 0.38 (0.4) | 0.45 (0.4) | 7.59 (17.7) |
died of any cause | 38 | 0.46 (0.5) | 0.69 (0.7) | 12.57 (57.1) |
Association of uPA system component levels with survival of ccRCC patients
Factor | No. cases | Disease-specific survival HR (95% CI)a
|
P
| Overall survival HR (95% CI)a
|
P
|
---|---|---|---|---|---|
Gender
| |||||
male | 65 | 1 | 1 | ||
female | 47 | 0.93 (0.38-2.28) | 0.880 | 1.65 (0.79-3.45) | 0.179 |
Age (years)
| |||||
≤64 | 57 | 1 | 1 | ||
>64 | 55 | 2.31 (0.89-5.99) | 0.085 | 2.52 (1.26-5.07) | 0.009 |
Tumour stage
| |||||
pT1+2 | 87 | 1 | 1 | ||
pT3+4 | 25 | 1.85 (0.73-4.69) | 0.192 | 1.17 (0.56-2.44) | 0.670 |
Tumour grade
| |||||
G1+2 | 68 | 1 | 1 | ||
G3+4 | 44 | 2.08 (0.83-5.19) | 0.118 | 1.61 (0.82-3.14) | 0.165 |
uPA
b
| |||||
low | 53 | 1 | 1 | ||
high | 59 | 2.86 (1.07-7.67) | 0.037 | 1.28 (0.66-2.51) | 0.467 |
uPAR
b
| |||||
low | 55 | 1 | 1 | ||
high | 57 | 4.70 (1.51-14.6) | 0.008 | 1.60 (0.80-3.23) | 0.185 |
PAI-1
b
| |||||
low | 56 | 1 | 1 | ||
high | 56 | 2.59 (0.95-7.08) | 0.064 | 1.71 (0.85-3.46) | 0.135 |
Analysis of combined uPA system component levels in tumour tissues for survival of ccRCC patients
Factor | No. cases | Disease-specific survival HR (95% CI)a
|
P
| Overall survival HR (95% CI)a
|
P
|
---|---|---|---|---|---|
uPA/uPAR
b
| |||||
uPA and uPAR low | 41 | 1 | 1 | ||
uPA and/or uPAR high | 71 | 14.5 (1.88-111.1) | 0.010 | 1.34 (0.64-2.82) | 0.438 |
uPA/PAI-1
b
| |||||
uPA and PAI-1 low | 43 | 1 | 1 | ||
uPA and/or PAI-1 high | 69 | 4.24 (1.21-14.9) | 0.024 | 1.63 (0.78-3.40) | 0.196 |
uPAR/PAI-1
b
| |||||
uPAR and PAI-1 low | 40 | 1 | 1 | ||
uPAR and/or PAI-1 high | 72 | 3.47 (0.98-12.2) | 0.053 | 1.56 (0.73-3.36) | 0.255 |
Factor | No. cases | Disease-specific survival HR (95% CI) a
|
P
| Overall survival HR (95% CI) a
|
P
|
---|---|---|---|---|---|
uPA/uPAR
b
| |||||
uPA and uPAR low | 35 | 1 | 1 | ||
uPA and/or uPAR high | 52 | 9.83 (1.21-79.6) | 0.032 | 1.03 (0.45-2.37) | 0.942 |
uPA/PAI-1
b
| |||||
uPA and PAI-1 low | 37 | 1 | 1 | ||
uPA and/or PAI-1 high | 50 | 3.23 (0.79-13.1) | 0.101 | 1.30 (0.56-3.02) | 0.541 |
uPAR/PAI-1
b
| |||||
uPAR and PAI-1 low | 35 | 1 | 1 | ||
uPAR and/or PAI-1 high | 52 | 2.68 (0.67-10.8) | 0.164 | 1.39 (0.58-3.29) | 0.460 |
Discussion
Parameter | Swiercz et al. [23]a
| Chautard et al. [22]b,c
| Span et al. [32] | Present study | |
---|---|---|---|---|---|
Number and type of Tu tissue samples
| 152 RCC (not specified): 105 for uPA, 49 for uPAR, 96 for PAI-1 | 52 RCC (not specified) | 100 RCC: 85 ccRCC, 11 papillary RCC, 4 sarcomatoid | 55 RCC (not specified) | 112 ccRCC |
Number and type of Tf tissue samples
| matched normal tissues from RCC kidneys | n = 28: 3 RCC-free kidneys, 18 normal tissues from RCC-kidneys, 7 tissues adjacent to RCC | matched normal tissues from RCC kidneys | matched normal tissues from RCC kidneys | matched normal tissues from RCC kidneys |
ELISA for uPA
| American Diagnostica | American Diagnostica | BYK Sangtec Medical (Nichols Laboratory) | self-designed ELISA | American Diagnostica |
ELISA for uPAR
| American Diagnostica | American Diagnostica | n.d. | n.d. | American Diagnostica |
ELISA for PAI-1
| self-designed ELISA | American Diagnostica | American Diagnostica, | self-designed ELISA | American Diagnostica |
Tissue processing
| detergent tissue extracts | detergent tissue extracts | cytosolic tissue extracts | detergent tissue extracts | detergent tissue extracts |
uPA
| |||||
in Tu | 0.29 | n.p. | 0.091 (0.043 in ccRCC) | 0.50 | 0.41 |
in Tf | 0.286 | n.p. | 0.078 | 0.71 | 0.61 |
Difference between Tu vs Tf | n.s. (Tu = Tf) |
P = 0.01 (Tu > Tf) | n.s. (Tu > Tf) | n.s. (Tu < Tf) |
P = 0.001 (Tu < Tf) |
uPAR
| |||||
in Tu | 0.78 | n.p. | n.d. | n.d. | 0.51 |
in Tf | 0.30 | n.p. | n.d. | n.d. | 0.52 |
Difference between Tu vs Tf |
P = 0.018 (Tu > Tf) |
P = 0.007 (Tu > Tf) | n.d. | n.d. | n.s. (Tu = Tf) |
PAI-1
| |||||
in Tu | 11.08 | n.p. | 40.8 (38.7 in ccRCC) | 7.26 | 10.3 |
in Tf | 4.221 | n.p. | 5.8 | 0.92 | 3.13 |
Difference between Tu vs Tf |
P = 0.02 (Tu > Tf) |
P = 0.001 (Tu > Tf) |
P < 0.001 (Tu > Tf) |
P < 0.001 (Tu > Tf) |
P = 0.001 (Tu > Tf) |