en زیست شناسی سلولی Cell Biology مقالات اصلی Original Article <div style="text-align: justify;"><em><strong>Background:</strong></em> The effect of proteasome inhibitors on atherosclerosis is known to vary depending on the&nbsp;atherosclerosis stage. Previous studies have shown that the highest proteasome expression in atherosclerotic&nbsp;lesions is at the progression stage. Adhesion molecules play a role in the progression stage of atherosclerosis,&nbsp;but no studies have analyzed the effect of proteasome inhibitors on the expression of adhesion molecules at&nbsp;this stage.<br> <br> <strong><em>Methods:</em></strong> This experimental study aimed to analyze the effect of a proteasome inhibitor, namely bortezomib,&nbsp;on the vascular cell adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule1 (ICAM-1)&nbsp;expressions in blood vessels of rat model of atherosclerosis at the progression stage. This study used 18 male&nbsp;Wistar rats divided into three groups, i.e. group I that is the control group given standard feed, group II induced&nbsp;by atherosclerosis, and group III induced by atherosclerosis and given bortezomib. Atherosclerosis induction&nbsp;was performed using vitamin D3 (700,000 IU/kg) orally by gastric intubation on the 1st day and atherogenic&nbsp;feed given for four days. Bortezomib 50 &mu;g/kgBW/day was administered intra-peritoneally. The expression<br> of VCAM-1 and ICAM-1 molecules was measured using immunohistochemistry and analyzed quantitatively&nbsp;using Adobe Photoshop software.<br> <br> <strong><em>Results:</em></strong> The statistical test showed differences in VCAM-1 expression between atherosclerosis + Bortezomib&nbsp;group and atherosclerosis group, but there were no differences in the expression of ICAM-1 and atherosclerotic&nbsp;lesions between the groups.<br> <br> <strong><em>Conclusions:</em></strong> Administration of bortezomib 50&mu;g/kg for four days in progressive atherosclerosis model rats can&nbsp;inhibit VCAM-1 expression, although it does not affect ICAM-1 expression and cannot inhibit atherosclerotic lesion&nbsp;formation.</div> Atherosclerosis, Bortezomib, Proteasome, VCAM-1, ICAM-1. 633 639 http://rbmb.net/browse.php?a_code=A-10-669-1&slc_lang=en&sid=1 Ismawati Ismawati ismawati75@yahoo.com. 100319475328460012504 100319475328460012504 Yes Department of Biochemistry, Faculty of medicine, Riau University, Pekanbaru, Indonesia. Ilhami Romus 100319475328460012505 100319475328460012505 No Department of Pathology Anatomy, Faculty of medicine, Riau University, Pekanbaru, Indonesia. Mukhyarjon Mukhyarjon 100319475328460012506 100319475328460012506 No Department of Biochemistry, Faculty of medicine, Riau University, Pekanbaru, Indonesia. Afra Muthya 100319475328460012507 100319475328460012507 No Faculty of medicine, Riau University, Pekanbaru, Indonesia.