Immunohistochemical analysis was performed as already described [41 (link),42 (link)]. Sections were incubated overnight with the following: anti-PPAR-α (1:1000, Santa Cruz Biotechnology, Heidelberg, Germany, sc-398394), anti-TRL4 (1:1000, Santa Cruz Biotechnology, Heidelberg, Germany, sc-293072), anti-claudin-11 (1:100, Thermofisher, Oxford, UK), or anti-occludin (1:100; Thermofisher, Oxford, UK). Images were collected using a Leica DM6 (Milan, Italy) microscope. The percentage area of immunoreactivity (described by the number of positive pixels) was reported as a percentage of the total tissue area [43 (link)].
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