Search

Background. Acute aortic dissection (AAD) is a devastating cardiovascular disease with a high rate of disability and mortality. This disease often rapidly progresses to fatal multiple organ hypoperfusion, and the incidence has been increasing in recent years. However, the molecular mechanisms have yet to be clarified. This study is aimed at identifying the differential abundance proteins (DAPs) of aortic arch tissues in patients with AAD by proteomics and select possible proteins involved in AAD pathogenesis. Methods. The fresh aortic arch tissues obtained from 5 AAD patients and 1 healthy donor were analyzed by amine-reactive tandem mass tag (TMT) labelling and mass spectrometry; then, the pathological sections of another 10 healthy donors and 20 AAD patients were chosen to verify the proteomic results by immunohistochemistry. Results. Of 809 proteins identified by proteomic analysis, 132 differential abundance proteins (DAPs) were screened, of which 100 proteins were significantly downregulated while 32 upregulated. Among 100 downregulated proteins, two proteins with known function, integrin alpha 3 (ITGA-3) and ITGA-5, were selected as target proteins involved in AAD pathogenesis. Two target DAPs were verified by immunohistochemisty, and the results showed that the integrated option density (IOD) of ITGA-3 and ITGA-5 in AAD patients was significantly lower than that in healthy donors, which were consistent with the proteomic results (P < 0.001). Conclusion. ITGA-3 and ITGA-5 represent novel biomarkers for the pathogenesis of AAD and might be a therapeutic target in the future. [ABSTRACT FROM AUTHOR]

Background. Acute aortic dissection (AAD) is a devastating cardiovascular disease with a high rate of disability and mortality. This disease often rapidly progresses to fatal multiple organ hypoperfusion, and the incidence has been increasing in recent years. However, the molecular mechanisms have yet to be clarified. This study is aimed at identifying the differential abundance proteins (DAPs) of aortic arch tissues in patients with AAD by proteomics and select possible proteins involved in AAD pathogenesis. Methods. The fresh aortic arch tissues obtained from 5 AAD patients and 1 healthy donor were analyzed by amine-reactive tandem mass tag (TMT) labelling and mass spectrometry; then, the pathological sections of another 10 healthy donors and 20 AAD patients were chosen to verify the proteomic results by immunohistochemistry. Results. Of 809 proteins identified by proteomic analysis, 132 differential abundance proteins (DAPs) were screened, of which 100 proteins were significantly downregulated while 32 upregulated. Among 100 downregulated proteins, two proteins with known function, integrin alpha 3 (ITGA-3) and ITGA-5, were selected as target proteins involved in AAD pathogenesis. Two target DAPs were verified by immunohistochemisty, and the results showed that the integrated option density (IOD) of ITGA-3 and ITGA-5 in AAD patients was significantly lower than that in healthy donors, which were consistent with the proteomic results (P < 0.001). Conclusion. ITGA-3 and ITGA-5 represent novel biomarkers for the pathogenesis of AAD and might be a therapeutic target in the future. [ABSTRACT FROM AUTHOR]

Abstract: Starting from two low‐nuclearity linear synthesised Co3 precursors {[Co3L’2(H2O)6]⋅2NO3⋅4H2O} (1) and {[Co3L’2(H2O)6]⋅2NO3} (2) (here, H2L=bis((pyridine‐2‐yl)‐1,2,4‐triazol‐5‐yl)methane, H2L’=bis((pyridine‐2‐yl)‐1,2,4‐triazol −5‐yl)ketone), a series of Co3‐substituted complexes and two higher‐nuclearity Co(II) clusters {[Co8L6(μ3‐O)2]⋅5H2O} (3) and [Co6L4(MeOH)6(OAc)4] (4) have been synthesized and characterized through regulating solvent, anion, and pH conditions. For tracking the formation of higher‐nuclearity clusters, the single‐crystal X‐ray diffraction (SXRD), powder X‐ray diffraction (PXRD) and electrospray ionization mass spectrometry (ESI‐MS) analyses for the solid‐liquid phase at different times, revealed that [Co2L2] and [Co2L] species can combine together to form [Co4L3] species, which bridged each other through two [μ3‐O]2− ions in strong alkaline conditions, to get [Co8(μ3‐O)2L6] units in 3; which or combined [Co2L] species in weak alkaline conditions, to get [Co6L4] species in 4. And the antiferromagnetic coupling in 1–4 has been briefly investigated. [ABSTRACT FROM AUTHOR]