Research Article

Overexpression of IRS-4 Correlates with Procaspase 3 Levels in Tumoural Tissue of Patients with Colorectal Cancer

Table 1

Correlations between biochemical parameters in patients with colorectal carcinoma.
(a) Correlations between ∆IRS-4/ ∆IRS-1 and ∆IGF-I pathway proteins in tumour and normal tissue

Δ IRS-4 vsΔ IRS-1Δ BRKΔ pIGF-1RΔ IGF-1RΔ EGFRΔ pAKTΔ AKTΔGSK3αΔGSK3βΔpGSK3
α
(ser 21)
ΔpGSK3
β
(ser 9)
ΔGSK3
frag.

r0,540,170,840,290,510,130,690,440,590,320,030,87
95% confidence interval0,06 to 0,82-0,55 to 0,740,58 to 0,94-0,23 to 0,690,03 to 0,81-0,38 to 0,590,30 to 0,88-0,07 to 0,770,14 to 0,84-0,20 to 0,70-0,46 to 0,520,66 to 0,95
R square0,290,0270,700,080,260,010,480,190,350,100,0010,76
P (one-tailed)0,0140,334< 0,00010,1320,0190,3040,0010,0860,0140,2220,892< 0,0001
P value summarynsnsnsnsnsns

Δ IRS-1 vsΔ IRS-4Δ BRKΔ pIGF-1RΔ IGF-1RΔ EGFRΔ pAKTΔ AKTΔGSK3αΔGSK3βΔpGSK3
α
(ser 21)
ΔpGSK3
β
(ser 9)
ΔGSK-3
frag.

r0,540,120,400,600,400,470,550,670,280,08-0,060,31
95% confidence interval0,06 to 0,81-0,58 to 0,72-0,10 to 0,750,16 to 0,84-0,10 to 0,75-0,02 to 0,780,07 to 0,820,27 to 0,87-0,25 to 0,68-0,42 to 0,55-0,54 to 0,44-0,21 to 0,70
R square0,290,010,170,370,170,220,300,460,080,0070,0040,1
P (one-tailed)0,0140,3750,0580,0060,0570,0310,0130,0040,2930,7570,8020,230
P value summarynsnsnsnsnsnsns

(b) Correlations between ∆IRS-4/∆IRS-1 and ∆ERK, ∆β Catenin and ∆ apoptosis biomarkers in tumour and normal tissue

Δ IRS-4 vsΔ pERKΔ ERKβ-Cateninβ-Catenin frag.Δ PCNAΔ Procaspase 3Δ Caspase3Δ PARPΔ PARP frag.Δp53Δp53 frag.

r0,110,560,570,190,230,770,640,890,780,330,87
95% confidence interval-0,40 to 0,570,08 to 0,820,10 to 0,83-0,33 to 0,63-0,51 to 0,770,44 to 0,910,21 to 0,860,69 to 0,960,47 to 0,92-0,19 to 0,700,67 to 0,95
R square0,010,310,320,040,050,580,410,790,610,100,77
P (one-tailed)0,3390,0120,0210,4640,2710,00030,0036< 0,00010,00020,212<0,0001
P value summarynsnsnsns

Δ IRS-1 vsΔ pERKΔ ERKβ-Cateninβ-Catenin fragΔ PCNAΔ Procaspase 3Δ Caspase 3Δ PARPΔ PARP frag.Δ p53Δ p53 frag.

r0,140,020,21-0,460,240,11-0,070,310,060,270,20
95% confidence interval-0,37 to 0,59-0,48 to 0,51-0,31 to 0,64-0,78 to 0,04-0,50 to 0,78-0,40 to 0,57-0,55 to 0,43-0,21 to 0,70-0,44 to 0,54-0,25 to 0,67-0,32 to 0,63
R square0,020,00040,040,210,060,010,0050,100,0040,070,04
P (one-tailed)0,2920,4700,4210,0700,2620,3410,3900,1160,4050,2970,454
P value summarynsnsnsnsnsnsnsnsnsnsns

The association between IRS-4/IRS-1 and the above-mentioned biochemical parameters in CRC was analysed by Pearson’s correlation coefficient (r). ∆ = difference between the protein expression in matched adjacent normal colonic tissue (n=20) and in CRC tissue (n=20). Significance levels: p < 0.05; p < 0.01; p < 0.001; p < 0.0001.).