Abstract:
:Intestinal mucositis is a common side effect of chemotherapy leading to diarrhea, abdominal pain and increased risk of infections. The intestinal microbiota has been recognized as a key regulator of mucosal immune responses. Therefore, we hypothesized that intestinal microbial changes would be associated with enterocyte loss and systemic inflammation during induction treatment for childhood acute lymphoblastic leukemia (ALL). We prospectively included 51 children newly-diagnosed with ALL treated in Denmark in 2015-2018. Plasma C-reactive protein (CRP), plasma citrulline (marker of functional enterocytes mass) measurements and fecal samplings were performed on treatment Days 1, 8, 15, 22 and 29. Moreover, intestinal mucositis was scored by a trained nurse/physician. Fecal samples in patients and 19 healthy siblings were analyzed by 16S rRNA gene sequencing (V3-V4 region). Bacterial alpha diversity was lower in patients compared to siblings. It decreased from Day 1 to Days 8-22 and increased on Day 29. Shannon alpha diversity index was correlated with CRP on Days 15-29 (rho = -0.33-0.49; p < 0.05) and with citrulline on Days 15 and 29 (although with p values <0.06, rho = 0.32-0.34). The abundance of unclassified Enterococcus species (spp.) was correlated with CRP on Days 22-29 (rho = 0.42-0.49; p < 0.009), while the abundance of unclassified Lachnospiraceae spp. was correlated with citrulline on days 8-15 (rho = 0.48-0.62, p < 0.001). Systemic inflammation, enterocyte loss and relative abundance of unclassified Enterococcus spp. reached a peak around Day 15. In conclusion, specific changes in the microbiota were associated with the severity of enterocyte loss and systemic inflammation during chemotherapy.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
De Pietri S,Ingham AC,Frandsen TL,Rathe M,Krych L,Castro-Mejía JL,Nielsen DS,Nersting J,Wehner PS,Schmiegelow K,Hasle H,Pamp SJ,Müller Kdoi
10.1002/ijc.32942subject
Has Abstractpub_date
2020-10-01 00:00:00pages
1953-1962issue
7eissn
0020-7136issn
1097-0215journal_volume
147pub_type
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