The EGFR-HSF1 axis accelerates the tumorigenesis of pancreatic cancer
Background: Pancreatic ductal adenocarcinoma (PDAC) is one of the most malignant diseases because of its non-symptomatic tumorigenesis. We previous found heat shock factor 1 (HSF1) was critical for PDAC progression and the aim of this study was to clarified the mechanisms on early activation of HSF1 and its role in the pancreatic cancer tumorigenesis.
Methods: The expression and location of HSF1 on human or mice pancreatic tissues were examined by immunohistochemically staining. We mainly used pancreatic acinar cell 3-dimensional (3D) culture and a spontaneous pancreatic precancerous lesion mouse model called LSL-KrasG12D/+; Pdx1-Cre (KC) (and pancreatitis models derived from KC mice) to explore the pro-tumorigenesis mechanisms of the HSF1 in vitro and in vivo. Bioinformatics and molecular experiments were used to explore the underlying mechanisms between HSF1 and epidermal growth factor receptor (EGFR).
Results: In this study, we found that pharmacological inhibition of HSF1 slowed pancreatic cancer initiation and suppressed the pancreatitis-induced formation of pancreatic precancerous lesion. Next, bioinformatics analysis revealed the closely linked between HSF1 and EGFR pathway and we also confirmed their parallel activation in pancreatic precancerous lesions. Besides, the pharmacological inhibition of EGFR suppressed the initiation of pancreatic cancer and the activation of HSF1 in vivo. Indeed, we demonstrated that the EGFR activation that mediated pancreatic cancer tumorigenesis was partly HSF1-dependent in vitro.
Conclusion: Hence, we concluded that the EGFR-HSF1 axis promoted the initiation of pancreatic cancer.
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This is a list of supplementary files associated with this preprint. Click to download.
Additional file 1: Figure S1: Related technologies mentioned in this article and basic morphology/pathology features of KC mice. Figure S2: Pharmacological inhibition of HSF1 suppressed the formation of ADM in vitro. Figure S3: EGFR stimulation activated HSF1 doubly in pancreatic acinar cells.
Additional file 2: Table S1: Source files of bioinformatics analysis on HSF1 and its related proteins (mainly TCGA PAAD datasets).
Additional file 3: Table S2: Source files of bioinformatics analysis on EGFR (mainly TCGA PAAD datasets).
Additional file 4: Table S3: Source files of bioinformatics analysis on EGFR pathway (GEO GSE98399 datasets).
Posted 31 Dec, 2020
On 09 Jan, 2021
On 24 Dec, 2020
Received 23 Dec, 2020
On 20 Dec, 2020
On 15 Dec, 2020
Received 15 Dec, 2020
On 14 Dec, 2020
Invitations sent on 14 Dec, 2020
On 14 Dec, 2020
On 14 Dec, 2020
On 09 Oct, 2020
Received 02 Oct, 2020
On 21 Sep, 2020
On 31 Aug, 2020
Received 25 Aug, 2020
On 14 Aug, 2020
On 07 Aug, 2020
Invitations sent on 07 Aug, 2020
On 06 Aug, 2020
On 06 Aug, 2020
On 06 Aug, 2020
The EGFR-HSF1 axis accelerates the tumorigenesis of pancreatic cancer
Posted 31 Dec, 2020
On 09 Jan, 2021
On 24 Dec, 2020
Received 23 Dec, 2020
On 20 Dec, 2020
On 15 Dec, 2020
Received 15 Dec, 2020
On 14 Dec, 2020
Invitations sent on 14 Dec, 2020
On 14 Dec, 2020
On 14 Dec, 2020
On 09 Oct, 2020
Received 02 Oct, 2020
On 21 Sep, 2020
On 31 Aug, 2020
Received 25 Aug, 2020
On 14 Aug, 2020
On 07 Aug, 2020
Invitations sent on 07 Aug, 2020
On 06 Aug, 2020
On 06 Aug, 2020
On 06 Aug, 2020
Background: Pancreatic ductal adenocarcinoma (PDAC) is one of the most malignant diseases because of its non-symptomatic tumorigenesis. We previous found heat shock factor 1 (HSF1) was critical for PDAC progression and the aim of this study was to clarified the mechanisms on early activation of HSF1 and its role in the pancreatic cancer tumorigenesis.
Methods: The expression and location of HSF1 on human or mice pancreatic tissues were examined by immunohistochemically staining. We mainly used pancreatic acinar cell 3-dimensional (3D) culture and a spontaneous pancreatic precancerous lesion mouse model called LSL-KrasG12D/+; Pdx1-Cre (KC) (and pancreatitis models derived from KC mice) to explore the pro-tumorigenesis mechanisms of the HSF1 in vitro and in vivo. Bioinformatics and molecular experiments were used to explore the underlying mechanisms between HSF1 and epidermal growth factor receptor (EGFR).
Results: In this study, we found that pharmacological inhibition of HSF1 slowed pancreatic cancer initiation and suppressed the pancreatitis-induced formation of pancreatic precancerous lesion. Next, bioinformatics analysis revealed the closely linked between HSF1 and EGFR pathway and we also confirmed their parallel activation in pancreatic precancerous lesions. Besides, the pharmacological inhibition of EGFR suppressed the initiation of pancreatic cancer and the activation of HSF1 in vivo. Indeed, we demonstrated that the EGFR activation that mediated pancreatic cancer tumorigenesis was partly HSF1-dependent in vitro.
Conclusion: Hence, we concluded that the EGFR-HSF1 axis promoted the initiation of pancreatic cancer.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6