Abstract:
BACKGROUND:Gram-negative bacteria mediated gemcitabine resistance in pre-clinical models. We determined if intratumoural lipopolysaccharide (LPS) detection by immunohistochemistry is associated with outcome in advanced pancreatic ductal adenocarcinoma (PDAC) treated with gemcitabine and non-gemcitabine containing 1st-line chemotherapy. METHODS:We examined LPS on tumour tissue from 130 patients treated within the randomised AIO-PK0104 trial and a validation cohort (n = 113) and analysed the association of LPS detection to patient outcome according to treatment subgroups. RESULTS:In 24% of samples from the AIO-PK0104 study LPS was detected; in LPS-positive patients median OS was 4.4 months, compared to 7.3 months with LPS negative tumours (HR 1.732, p = 0.010). A difference in OS was detected in 1st-line gemcitabine-treated patients (n = 71; HR 2.377, p = 0.002), but not in the non-gemcitabine treatment subgroup (n = 59; HR 1.275, p = 0.478). Within the validation cohort, the LPS positivity rate was 23%, and LPS detection was correlated with impaired OS in the gemcitabine subgroup (n = 94; HR 1.993, p = 0.008) whereas no difference in OS was observed in the non-gemcitabine subgroup (n = 19; HR 2.596, p = 0.219). CONCLUSIONS:The detection of intratumoural LPS as surrogate marker for gram-negative bacterial colonisation may serve as a negative predictor for gemcitabine efficacy in advanced PDAC. CLINICAL TRIAL REGISTRY:The Clinical trial registry identifier is NCT00440167.
journal_name
Br J Cancerjournal_title
British journal of cancerauthors
Guenther M,Haas M,Heinemann V,Kruger S,Westphalen CB,von Bergwelt-Baildon M,Mayerle J,Werner J,Kirchner T,Boeck S,Ormanns Sdoi
10.1038/s41416-020-01029-7subject
Has Abstractpub_date
2020-10-01 00:00:00pages
1370-1376issue
9eissn
0007-0920issn
1532-1827pii
10.1038/s41416-020-01029-7journal_volume
123pub_type
杂志文章abstract::Local recurrence of glioblastomas is a major cause of patient mortality after definitive treatment. This review discusses the roles of the chemokine stromal cell-derived factor-1 and its receptor CXC chemokine receptor 4 (CXCR4) in affecting the sensitivity of glioblastomas to irradiation. Blocking these molecules pre...
journal_title:British journal of cancer
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