Loss of Bid does not alter the cytokine and chemokine milieu of the joint. (a) Pro-inflammatory cytokine production in ankle joints following transfer of K/BxN serum. Untreated wild-type (Wt) and Bid-/- mice were euthanized at three, five, or seven days post-serum transfer. Ankles from each mouse (days 3, n = 6 (Wt) and n= 8 (Bid-/-); day 5, n = 10; day 7, n = 12 (Wt) and n = 8 (Bid-/-)) were isolated, snap frozen, ground into a fine powder, lysed, and examined for production of tumor necrosis factor (TNF)α and IL-1β using sandwich ELISAs. (b) Chemokine production in ankle joints following transfer of K/BxN serum. Ankles lysates as described above were examined for production of CXC chemokine (KC) and monocyte chemoattractant protein (MCP)-1 using ELISA. Data are shown as μg/μl per joint. Values represent the mean ± standard error, which were compared by Student's t-test.