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01.12.2023 | Original Article

Frequency of infiltrating regulatory T-cells in the portal tract of biliary atresia

verfasst von: Satoru Oita, Takeshi Saito, Rei Hashimoto, Takashi Fumita, Yoshio Katsumata, Keita Terui, Shugo Komatsu, Ayako Takenouchi, Jun-ichiro Ikeda, Tomoro Hishiki

Erschienen in: Pediatric Surgery International | Ausgabe 1/2023

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Abstract

Purpose

Immunological abnormalities have been hypothesized as a pathogenesis of biliary atresia (BA). We previously investigated the frequency and function of circulating regulatory T-cells (Tregs) and reported no differences compared to controls. However, the local Treg profile remains uncertain. We aimed to investigate the frequency of Tregs in BA liver tissues.

Methods

The number of lymphocytes, CD4⁺ cells, and CD4⁺FOXP3⁺ Tregs infiltrating the portal tract and the percentage of Tregs among CD4⁺ cells of BA and control patients were visually counted. The correlation between these data and clinical indicators was also examined.

Results

The number of lymphocytes, CD4⁺ cells, and CD4⁺FOXP3⁺ Tregs was higher in the BA group. However, the percentage of Tregs among CD4⁺ cells was similar in both groups. Each parameter was correlated with serum γ-GTP, but there was no clear association with liver fibrosis, jaundice clearance, and native liver survival.

Conclusion

The number of Tregs infiltrating the portal tract was higher in BA patients. However, the infiltration of lymphocytes was also generally increased. Tregs appear to be unsuccessful in suppressing progressive inflammation in BA patients, despite recruitment to local sites. Investigation of Treg function in the local environment is warranted.

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Titel: Frequency of infiltrating regulatory T-cells in the portal tract of biliary atresia
verfasst von: Satoru Oita
Takeshi Saito
Rei Hashimoto
Takashi Fumita
Yoshio Katsumata
Keita Terui
Shugo Komatsu
Ayako Takenouchi
Jun-ichiro Ikeda
Tomoro Hishiki
Publikationsdatum: 01.12.2023
Verlag: Springer Berlin Heidelberg
Erschienen in: Pediatric Surgery International / Ausgabe 1/2023
Print ISSN: 0179-0358
Elektronische ISSN: 1437-9813
DOI: https://doi.org/10.1007/s00383-023-05547-2

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Frequency of infiltrating regulatory T-cells in the portal tract of biliary atresia