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Table 2 α1(IV), α4(IV), α6(IV) and α1(VII) mRNA levels in normal and neoplastic colonic tissues.

From: Collagen mRNA levels changes during colorectal cancer carcinogenesis

 

mRNA level in normal tissue*

Mean (SD)

pa

mRNA level in neoplastic tissue

Mean (SD)

pa

pb

α1(IV)

     

Healthy individual

8.3 × 10-3 (6.5 × 10-3)

    

Patients with adenoma

6.3 × 10-3 (2.6 × 10-3)

NS

20.6 × 10-3 (10.4 × 10-3)

NS

< 0.001

Patients with carcinoma

15.0 × 10-3 (14.6 × 10-3)**

NS

53.6 × 10-3 (42.0 × 10-3)

< 0.001

< 0.001

Patients with carcinoma

20.2 × 10-3 (17.8 × 10-3)***

NS

53.6 × 10-3 (42.0 × 10-3)

 

< 0.001

α4(IV)

     

Healthy individual

8.8 × 10-5 (3.6 × 10-5)

    

Patients with adenoma

8.6 × 10-5 (3.7 × 10-5)

NS

4.4 × 10-5 (3.5 × 10-5)

NS

< 0.001

Patients with carcinoma

17.5 × 10-5(18.7 × 10-5)**

NS

11.4 × 10-5 (15.9 × 10-5)

NS

NS

Patients with carcinoma

20.1 × 10-5 (16.9 × 10-5)***

NS

11.4 × 10-5 (15.9 × 10-5)

 

< 0.01

α6(IV)

     

Healthy individual

8.2 × 10-5 (4.6 × 10-5)

    

Patients with adenoma

9.4 × 10-5 (5.6 × 10-5)

NS

9.3 × 10-5 (6.3 × 10-5)

NS

NS

Patients with carcinoma

7.1 × 10-5 (9.5 × 10-5)**

NS

1.5 × 10-5 (2.8 × 10-5)

< 0.05

< 0.001

Patients with carcinoma

7.4 × 10-5 (9.8 × 10-5)***

NS

1.5 × 10-5 (2.8 × 10-5)

 

< 0.001

α1(VII)

     

Healthy individual

5.1 × 10-6 (1.8 × 10-6)

    

Patients with adenoma

5.2 × 10-6 (3.8 × 10-6)

NS

9.6 × 10-6 (6.0 × 10-6)

NS

< 0.01

Patients with carcinoma

7.3 × 10-6 (7.6 × 10-6)**

NS

17.8 × 10-6 (1.9 × 10-6)

< 0.01

< 0.001

Patients with carcinoma

7.3 × 10-6 (8.0 × 10-6)***

NS

17.8 × 10-6 (1.9 × 10-6)

 

< 0.001

  1. The mRNA levels were normalized to β-actin mRNA levels.
  2. *Normal tissue: histologically normal colonic biopsies taken from healthy individuals or individuals with adenomas or carcinoma: ** = normal tissue taken from surgical specimens as distant from the carcinoma as possible; *** = normal tissue taken in close proximity to the carcinoma.
  3. NS = not significant (P > 0.05)
  4. a) p value for the comparison of the mRNA levels in normal tissue from healthy individuals with either normal or neoplastic tissue from patients using a one-way ANOVA and Tukey's Multiple Comparison Test.
  5. b) p value for the comparison of the mRNA levels in normal and neoplastic tissue from the same patient using paired T-test.