Tigatuzumab

Chronic moderate-to-severe plaque psoriasis frequently requires long-term biol. treatment, but treatment gaps resulting in relapse are not uncommon.Tildrakizumab is a high-affinity, humanized, IgG1kappa, anti-interleukin-23p19 monoclonal antibody approved to treat plaque psoriasis.This study focus on adult patients with moderate-to-severe plaque psoriasis required tildrakizumab-treated patients who achieved ≥ 75% improvement from baseline Psoriasis Area and Severity Index score (PASI 75; responders) at Week 28 to be rerandomized to either continued tildrakizumab treatment or withdrawal (placebo) with retreatment with their initial dose of tildrakizumab upon relapse.Of 116 patients continuously treated with tildrakizumab 100 mg after Week 28, 92.6%, 81.5% and 49.6% achieved PASI 50, PASI 75 and PASI 90, resp., at Week 64.From Weeks 28 - 64 of reSURFACE 1, tildrakizumab 100 mg was well tolerated and efficacious in patients receiving continuous treatment; patients withdrawn to placebo recovered response within a median of 28 days.The durability of tildrakizumab responses and rapid regain of efficacy after relapse and retreatment support long-term clin. use of tildrakizumab for the treatment of moderate-to-severe psoriasis.

TRAIL-activating therapy is promising in treating various cancers, including pancreatic cancer, a highly malignant neoplasm with poor prognosis. However, many pancreatic cancer cells are resistant to TRAIL-induced apoptosis despite their expression of intact death receptors (DRs). Protein O-GlcNAcylation is a versatile posttranslational modification that regulates various biological processes. Elevated protein O-GlcNAcylation has been recently linked to cancer cell growth and survival. In this study, we evaluated the role of protein O-GlcNAcylation in pancreatic cancer TRAIL resistance, and identified higher levels of O-GlcNAcylation in TRAIL-resistant pancreatic cancer cells. With gain- and loss-of-function of the O-GlcNAc-adding enzyme, O-GlcNActransferase (OGT), we determined that increasing O-GlcNAcylation rendered TRAIL-sensitive cells more resistant to TRA-8-induced apoptosis, while inhibiting O-GlcNAcylation promoted TRA-8-induced apoptosis in TRAIL-resistance cells. Furthermore, we demonstrated that OGT knockdown sensitized TRAIL-resistant cells to TRA-8 therapy in a mouse model in vivo. Mechanistic studies revealed direct O-GlcNAc modifications of DR5, which regulated TRA-8-induced DR5 oligomerization. We further defined that DR5 O-GlcNAcylation was independent of FADD, the adapter protein for the downstream death-inducing signaling. These studies have demonstrated an important role of protein O-GlcNAcylation in regulating TRAIL resistance of pancreatic cancer cells; and uncovered the contribution of O-GlcNAcylation to DR5 oligomerization and thus mediating DR-inducing signaling.