Insulin downregulated the infection of uropathogenic escherichia coli (UPEC) in bladder cells in a high-glucose environment through JAK/STAT signaling pathway

Chen Hsun Ho, Shih Ping Liu, Chia Kwung Fan, Kai Yi Tzou, Chia Chang Wu, Po Ching Cheng

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Diabetic individuals have a higher incidence of urinary tract infection (UTI) than non-diabetic individuals, and also require longer treatment. We evaluated the effects of insulin pretreat-ment on the regulation of JAK/STAT transduction pathways in UPEC-infected bladder cells in a high-glucose environment. A bladder cell model with GFP-UPEC and fluorescent-labeled TLR4, STAT1, STAT3, and insulin receptor antibodies, was used to evaluate the relationship between insulin receptor signaling, TLR-4-mediated, and JAK/STAT-dependent pathways. Pretreatment with 20 and 40 µg/mL insulin for 24 h significantly and dose-dependently reduced UPEC infection in SV-HUC-1 cells. Additionally, the expression levels of STAT1 and STAT3 were downregulated in a dose-dependent manner. However, insulin receptor (IR) expression was not affected by insulin pre-treatment. Our results showed that insulin-mediated reduction of UPEC infection in a high-glucose environment was not only due to the downregulation of JAK1/2 and phosphorylated STAT-1/3, but also because of the decreased expression of TLR-4 proteins and pro-inflammatory IL-6. Here, we demonstrated that insulin reduced not only UPEC infection in bladder epithelial cells, but also in-hibited the JAK/STAT transduction pathway during infection in a high-glucose environment. This study provides evidence to support the use of insulin in the treatment of UPEC infection in patients with type 2 diabetes (T2D).

Original languageEnglish
Article number2421
JournalMicroorganisms
Volume9
Issue number12
DOIs
Publication statusPublished - Dec 2021

Keywords

  • Bladder cells
  • Insulin
  • JAK/STAT
  • Urinary tract pathogenic Escherichia coli

ASJC Scopus subject areas

  • Microbiology
  • Microbiology (medical)
  • Virology

Fingerprint

Dive into the research topics of 'Insulin downregulated the infection of uropathogenic escherichia coli (UPEC) in bladder cells in a high-glucose environment through JAK/STAT signaling pathway'. Together they form a unique fingerprint.

Cite this