title: Whole proteome analysis of mouse lymph nodes in cutaneous anthrax.
abstract: This study aimed to characterize a soluble proteome of popliteal lymph nodes during lymphadenitis induced by intradermal injection of Bacillus anthracis Sterne spores in mice using tandem LC-MS/MS and reverse-phase protein microarray with antibodies specific to epitopes of phosphorylated proteins. More than 380 proteins were detected in the normal intra-nodal lymph, while the infectious process resulted in the profound changes in the protein abundances and appearance of 297 unique proteins. These proteins belong to an array of processes reflecting response to wounding, inflammation and perturbations of hemostasis, innate immune response, coagulation and fibrinolysis, regulation of body fluid levels and vascular disturbance among others. Comparison of lymph and serum revealed 83 common proteins. Also, using 71 antibodies specific to total and phosphorylated forms of proteins we carried initial characterization of circulating lymph phosphoproteome which brought additional information regarding signaling pathways operating in the lymphatics. The results demonstrate that the proteome of intra-nodal lymph serves as a sensitive sentinel of the processes occurring within the lymph nodes during infection. The acute innate response of the lymph nodes to anthrax is accompanied by cellular damage and inflammation with a large number of up- and down-regulated proteins many of which are distinct from those detected in serum. MS data are available via ProteomeXchange with identifier PXD001342.
authors.affiliation: School of Systems Biology, George Mason University, Manassas, Virginia, United States of America.
authors.forename: Taissia G
authors.initials: TG
authors.lastname: Popova
authors.affiliation: School of Systems Biology, George Mason University, Manassas, Virginia, United States of America.
authors.forename: Virginia
authors.initials: V
authors.lastname: Espina
authors.affiliation: School of Systems Biology, George Mason University, Manassas, Virginia, United States of America.
authors.forename: Weidong
authors.initials: W
authors.lastname: Zhou
authors.affiliation: School of Systems Biology, George Mason University, Manassas, Virginia, United States of America.
authors.forename: Claudius
authors.initials: C
authors.lastname: Mueller
authors.affiliation: School of Systems Biology, George Mason University, Manassas, Virginia, United States of America.
authors.forename: Lance
authors.initials: L
authors.lastname: Liotta
authors.affiliation: School of Systems Biology, George Mason University, Manassas, Virginia, United States of America.
authors.forename: Serguei G
authors.initials: SG
authors.lastname: Popov
mesh_terms: D000818:Animals; D000881:Anthrax / Q000378:metabolism* / Q000473:pathology; D001408:Bacillus anthracis; D005786:Gene Expression Regulation; D008198:Lymph Nodes / Q000378:metabolism* / Q000473:pathology; D051379:Mice; D020543:Proteome / Q000096:biosynthesis*; D017192:Skin Diseases, Bacterial / Q000378:metabolism* / Q000473:pathology
chemical_list: D020543:Proteome