Evaluation of Pulmonary Air-Blood Barrier Damage in Ulcerative Colitis Inflammatory Cancer Transformation Model Mice:Based on the "Lung-Intestine Correlation" Theory
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Evaluation of Pulmonary Air-Blood Barrier Damage in Ulcerative Colitis Inflammatory Cancer Transformation Model Mice:Based on the "Lung-Intestine Correlation" Theory
增强出版
Journal of Traditional Chinese MedicineVol. 67, Issue 7, Pages: 776-783(2026)
XU Huiyan,ZHANG Haimei,ZHAN Xinyu,et al.Evaluation of Pulmonary Air-Blood Barrier Damage in Ulcerative Colitis Inflammatory Cancer Transformation Model Mice:Based on the "Lung-Intestine Correlation" Theory[J].Journal of Traditional Chinese Medicine,2026,67(07):776-783.
XU Huiyan,ZHANG Haimei,ZHAN Xinyu,et al.Evaluation of Pulmonary Air-Blood Barrier Damage in Ulcerative Colitis Inflammatory Cancer Transformation Model Mice:Based on the "Lung-Intestine Correlation" Theory[J].Journal of Traditional Chinese Medicine,2026,67(07):776-783.DOI: 10.13288/j.11-2166/r.2026.07.013.
Evaluation of Pulmonary Air-Blood Barrier Damage in Ulcerative Colitis Inflammatory Cancer Transformation Model Mice:Based on the "Lung-Intestine Correlation" Theory增强出版
To dynamically observe and evaluate the damage to the pulmonary air-blood barrier in mice during the inflammatory cancer transformation process of ulcerative colitis (UC) based on the "lung-intestine correlation" theory.
Methods
2
Sixty-five C57BL/6 mice were divided into a normal group (n=25) and a model group (n=40) using a random number table. Azoxymethane/dextran sodium sulfate (DSS) method was used to establish a mouse model of UC inflammation cancer transformation in the modeling group. According to the tissue collection time points at 5, 8, 11, 13, and 15 weeks, the normal group mice were randomly divided into the normal 5w, 8w, 11w, 13w, and 15w groups. The model group mice, 10 mice of which died after the first cycle of DSS administration, were randomly divided into model 5w, 8w, 11w, 13w, and 15w groups. During the experiment, the general condition of the mice was observed daily, and their body weight was measured weekly. At the corresponding tissue collection time points, the colon length of each group was measured. Histopathology of mouse lung and colon tissues was examined using HE staining. Immunofluorescence was used to detect changes in the positive expression of tight junction protein (ZO-1), vascular endothelial cadherin (VE-cadherin), and cytoskeletal protein (F-actin) in lung and colon tissues. RT-PCR was used to detect the mRNA expression of apoptosis regulatory proteins B-cell lymphoma-2 (
Bcl
-
2
), BCL2-associated X protein (
Bax
), and Cysteine aspartic acid protease-3 (
Caspase
-
3
) in lung tissues. Western Blot was employed to measure protein levels of ZO-1, VE-cadherin, and F-actin in lung tissues.
Results
2
Compared to the normal group at the same time point, the mice in the model group at each time point generally had poorer conditions, with weight loss and shortened colon length (
P
<0.05 or
P
<0.01). In the model 5w group, there was significant inflammatory cell infiltration in the colon tissue; in the model 8w group, there was mild atypical hyperplasia; in the model 11w group, the crypt structure was disordered, and moderate to severe atypical hyperplasia occurred; in the model 13w and 15w groups, tumors appeared. Pulmonary interstitial lesions, inflammation, vasculitis, and fibrosis were observed at all stages of UC inflammation cancer transformation. The protein levels of ZO-1, VE-cadherin, and F-actin, as well as
Bcl
-
2
mRNA expression in lung tissue decreased during the acute inflammatory recovery period, atypical hyperplasia period, and canceration period, while the expressions of
Bax
and
Caspase
-
3
mRNA increased; the expressions of ZO-1, VE-cadherin, and F-actin proteins in colon tissue decreased during the acute inflammatory recovery period, atypical hyperplasia period, and canceration period (
P
<0.01 or
P
<0.05). Compared to the model 5w group, the ZO-1 and F-actin protein levels and
Bcl
-
2
mRNA expression in lung tissue in the other model groups increased in the atypical hyperplasia period and canceration period, while the expressions of
Bax
and
Caspase
-
3
mRNA decreased; the expression of ZO-1 protein in colon tissue increased in the canceration period, and the expression of VE-cadherin protein decreased in the atypical hyperplasia period (
P
<0.01 or
P
<0.05).
Conclusion
2
In the process of "inflammatory response-atypical hyperplasia-carcinogenesis" in UC inflammatory cancer transformation mice, there were damage to air-blood barrier.
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