DOCK4 Regulation of Rho GTPases Mediates Pulmonary Vascular Barrier Function.

Background: The vascular endothelium maintains tissue-fluid homeostasis by controlling the passage of large molecules and fluid between the blood and interstitial space. The interaction of catenins and the actin cytoskeleton with VE-cadherin (vascular endothelial cadherin) is the primary mechanism for stabilizing AJs (adherens junctions), thereby preventing lung vascular barrier disruption. Members of the Rho (Ras homology) family of GTPases and conventional GEFs (guanine exchange factors) of these GTPases have been demonstrated to play important roles in regulating endothelial permeability.

Fecal Calprotectin Responses Following Induction Therapy With Vedolizumab in Moderate to Severe Ulcerative Colitis: A Post Hoc Analysis of GEMINI 1.

Background: In patients with ulcerative colitis (UC), fecal calprotectin (FC) concentrations correlate with endoscopic inflammation evidence. This study investigated the effect of vedolizumab induction on FC concentrations and whether FC concentrations could be a reliable surrogate measure of disease status.

Methods: Data from the placebo-controlled, phase 3 trial GEMINI 1 were used to evaluate week-6 relationships between outcomes (including clinical remission, mucosal healing [MH], and endoscopic remission) and both absolute FC concentration values and relative FC concentration changes from baseline (%FC0-6).

A Programme for Risk Assessment and Minimisation of Progressive Multifocal Leukoencephalopathy Developed for Vedolizumab Clinical Trials.

Introduction: Over the past decade, the potential for drug-associated progressive multifocal leukoencephalopathy (PML) has become an increasingly important consideration in certain drug development programmes, particularly those of immunomodulatory biologics. Whether the risk of PML with an investigational agent is proven (e.g.

A Review of the Clinical Pharmacokinetics, Pharmacodynamics, and Immunogenicity of Vedolizumab.

Vedolizumab is a humanized anti-αβ integrin monoclonal antibody that selectively blocks trafficking of memory T cells to inflamed gut tissue by inhibiting the αβ-mucosal addressin cell adhesion molecule-1 (MAdCAM-1) interaction. Approved for treating patients with moderately to severely active ulcerative colitis (UC) or Crohn's disease (CD), vedolizumab is administered as a 300 mg intravenous infusion. Vedolizumab undergoes a rapid, saturable, non-linear, target-mediated elimination process at low concentrations and a slower, linear, non-specific elimination process at higher concentrations.

Exposure-efficacy Relationships for Vedolizumab Induction Therapy in Patients with Ulcerative Colitis or Crohn's Disease.

Background And Aims: A positive relationship between vedolizumab trough serum concentrations and clinical outcomes in patients with ulcerative colitis [UC] or Crohn's disease [CD] has been reported. Here we further explore exposure-efficacy relationships for vedolizumab induction therapy in post hoc analyses of GEMINI study data.

Methods: Vedolizumab trough concentrations at Week 6 or 10 were grouped in quartiles and clinical outcome rates calculated.

Vedolizumab Pharmacokinetics, Pharmacodynamics, Safety, and Tolerability Following Administration of a Single, Ascending, Intravenous Dose to Healthy Volunteers.

Background And Objectives: Vedolizumab, a humanized monoclonal antibody against the αβ integrin, is indicated for treatment of moderately to severely active ulcerative colitis or Crohn's disease. In this placebo-controlled, double-blind, randomized, single ascending-dose study, the pharmacokinetics, pharmacodynamics, safety, and tolerability of vedolizumab were evaluated in healthy volunteers.

Methods: Forty-nine participants (in five cohorts) were randomly assigned in a 4:1 ratio to receive a single intravenous infusion of either vedolizumab (0.

The safety of vedolizumab for ulcerative colitis and Crohn's disease.

Objective: Vedolizumab is a gut-selective antibody to αβ integrin for the treatment of ulcerative colitis (UC) and Crohn's disease (CD). We report an integrated summary of the safety of vedolizumab.

Design: Safety data (May 2009-June 2013) from six trials of vedolizumab were integrated.

Occurrence of adverse events among patients with inflammatory bowel disease in the HealthCore Integrated Research Database.

Objectives: Inflammatory bowel disease (IBD) is a chronic condition commonly requiring lifelong care. Both IBD and IBD-related treatments can cause significant morbidity, and it is often difficult to differentiate their relative etiologic contribution to adverse events (AEs). The objectives of this study were to assess the rates of select AEs among patients with IBD as a function of disease severity and of the use of anti-tumor necrosis factor alpha (anti-TNFα) medications.

Phase I dose-escalation trial of the oral investigational Hedgehog signaling pathway inhibitor TAK-441 in patients with advanced solid tumors.

Purpose: This first-in-human study assessed safety, tolerability, pharmacokinetics, pharmacodynamics, and preliminary clinical activity of single and multiple doses of TAK-441, an investigational inhibitor of the Hedgehog signaling pathway.

Experimental Design: Patients with advanced, solid tumors received daily oral TAK-441 (50-1,600 mg/day); daily dose was doubled in each subsequent cohort until the maximum tolerated/feasible dose (MTD/MFD) was reached. Blood was collected to evaluate TAK-441 plasma concentrations.

Effects of vedolizumab induction therapy for patients with Crohn's disease in whom tumor necrosis factor antagonist treatment failed.

Background & Aims: There is an increasing need for new treatments for patients with Crohn's disease (CD) in whom previous therapy with tumor necrosis factor (TNF) antagonists has failed. We performed a placebo-controlled, phase 3, double-blind trial to evaluate the efficacy and safety of vedolizumab, an antibody against the integrin α4β7, as induction therapy.

Methods: Patients with moderately to severely active CD (CD activity index [CDAI] score, 220-400 points) were assigned randomly to groups given vedolizumab (300 mg) or placebo intravenously at weeks 0, 2, and 6.

Vedolizumab affects antibody responses to immunisation selectively in the gastrointestinal tract: randomised controlled trial results.

Objective: The α4β7 integrin monoclonal antibody vedolizumab is hypothesised to be gut selective. Effects of vedolizumab on immune responses to parenterally or enterally administered antigens were investigated.

Design: In this randomised, double-blind, placebo-controlled, phase I trial, healthy participants received a single intravenous dose of vedolizumab 750 mg (n=64) or placebo (n=63).

Vedolizumab, a monoclonal antibody to the gut homing α4β7 integrin, does not affect cerebrospinal fluid T-lymphocyte immunophenotype.

Vedolizumab, a gut-homing α4β7 integrin antagonist, has demonstrated efficacy in ulcerative colitis and Crohn's disease. Development of progressive multifocal leukoencephalopathy, a serious brain infection associated with natalizumab (an α4β7 and α4β1 integrin antagonist), has raised concern that vedolizumab may convey a similar risk. Natalizumab is believed to impair central nervous system immune surveillance by affecting cerebrospinal fluid (CSF) lymphocyte counts and the CD4:CD8 ratio.

Vedolizumab as induction and maintenance therapy for Crohn's disease.

Background: The efficacy of vedolizumab, an α4β7 integrin antibody, in Crohn's disease is unknown.

Methods: In an integrated study with separate induction and maintenance trials, we assessed intravenous vedolizumab therapy (300 mg) in adults with active Crohn's disease. In the induction trial, 368 patients were randomly assigned to receive vedolizumab or placebo at weeks 0 and 2 (cohort 1), and 747 patients received open-label vedolizumab at weeks 0 and 2 (cohort 2); disease status was assessed at week 6.

Vedolizumab as induction and maintenance therapy for ulcerative colitis.

Background: Gut-selective blockade of lymphocyte trafficking by vedolizumab may constitute effective treatment for ulcerative colitis.

Methods: We conducted two integrated randomized, double-blind, placebo-controlled trials of vedolizumab in patients with active disease. In the trial of induction therapy, 374 patients (cohort 1) received vedolizumab (at a dose of 300 mg) or placebo intravenously at weeks 0 and 2, and 521 patients (cohort 2) received open-label vedolizumab at weeks 0 and 2, with disease evaluation at week 6.

Long-term clinical experience with vedolizumab in patients with inflammatory bowel disease.

Background: Vedolizumab, a gut-selective, anti-inflammatory monoclonal antibody, has shown preliminary efficacy in ulcerative colitis (UC) and Crohn's disease (CD). We report long-term experience with vedolizumab for active UC and CD.

Methods: After a placebo-controlled study, 38 patients with UC were randomized to a loading regimen of vedolizumab 2, 6, or 10 mg/kg on days 1, 15, and 43, followed by maintenance dosing every 8 weeks.

Vedolizumab for the treatment of active ulcerative colitis: a randomized controlled phase 2 dose-ranging study.

Background: Vedolizumab is a gut-selective biologic that has shown efficacy in ulcerative colitis (UC) and Crohn's disease (CD). We studied the pharmacokinetics, pharmacodynamics, safety, tolerability, and efficacy of a new formulation of vedolizumab produced by an improved manufacturing process.

Methods: UC patients were randomized to receive vedolizumab (2, 6, or 10 mg/kg) or placebo on days 1, 15, 29, and 85.

Treatment of active Crohn's disease with MLN0002, a humanized antibody to the alpha4beta7 integrin.

Background & Aims: Selective blockade of lymphocyte-vascular endothelium interactions in the gastrointestinal tract is a promising therapeutic strategy for inflammatory bowel disease. This randomized, double-blind, controlled trial assessed the efficacy and safety of MLN0002, a monoclonal antibody targeting the alpha4beta7 integrin, in patients with active Crohn's disease.

Methods: Patients were randomized to receive MLN0002 2.