These data suggested that both α4-integrins mediate OT-I adhesion to the inflamed spinal cord microvasculature.
Using α2-knockout keratinocytes and dermal fibroblasts, it was shown that α2 integrin regulates the cell attachment and migration on collagen I, whereas adhesion to collagen IV and laminin I is permissive.
Similarly, glycosylation of AIDA-I is required for normal conformation and for AIDA-I mediated adhesion to epithelial cells [39].
I Adhesion of bacteria to biomaterial involves reversible cellular association with the surface.
Further work is thus needed to decipher (i) if, beside adhesion to host cells, gonococcal PilC1 and PilC2 variants promote qualitatively different host cell responses, and (ii) how the regulation of both pilC genes is in control of the cellular response.
TibC catalyzes TibA/AIDA-I heptosylation and confers AIDA-I-mediated bacterial adhesion to host cells.
Alanine substitution of Asp-110, Arg-286, Trp-305, or Lys-230 in TibC all abolished or largely diminished TibA/AIDA-I heptosylation in E. coli; these point mutants also failed to support AIDA-I-mediated bacterial adhesion to HeLa cells.
Interestingly, the involvement of α4-integrins in mediating OT-I T cell adhesion to the inflamed BBB was only transient, as at the later times adhesion of OT-I T cells was no longer inhibited by the presence of α4-integrin blocking antibodies.
Parental Karpas 299 cells also exhibited higher collagenase I activity and greater adhesion to collagenase I than CD26-knockdown or versican-knockdown cells.
First, the efficacy of the cleaning system might not be optimal in some patients, possibly due to different physical properties of the secretions (i.e., density, adhesion to the plastic surface) and to the presence of an amount of biofilm which is difficult to remove [21].
10−6 M NA stimulation of BMMs isolated from CIA rats 20 days p. i. showed reduced adhesion to fibronectin (P = 0.0625, Fig. 4d) and laminin (P = 0.0625, Fig. 4f).
