University of Maryland, Baltimore

This is an open-label, non-randomized study. The purpose of this study is to better understand how vaccines against typhoid fever and cholera affect the normal immune system and bacteria in the intestine. Patients having standard-of-care endoscopies (colonoscopy and/or esophagogastroduodenoscopy (EGD)) will be divided into 3 groups: Group 1: Vivotif typhoid vaccination and/or Vaxchora cholera vaccination then endoscopy Group 2: Endoscopy, then Vivotif typhoid vaccination and/or Vaxchora cholera vaccination, then follow-up endoscopy Group 3: Endoscopy without vaccination. Both vaccines used in this study are licensed by the Food and Drug Administration (FDA) for travelers to developing countries. Volunteers will be asked to donate tissue, blood, saliva and stool samples for studying how the body responds to the typhoid and/or cholera vaccine.

Type: Interventional

Start Date: Nov 2018

open study

The investigators will perform follow-up on 500 cases of deep and lobar intracerebral hemorrhage to perform advanced neuroimaging before 45 days post stroke, and evaluations of motor and cognitive function at baseline, 3 months and 6 months to determine predictors of recovery, progressive cognitive or functional impairment.

Type: Observational

Start Date: Aug 2017

open study

Studying the dynamics of red blood cell lysis, pfH, protective proteins and organ injury, limits will be set for safe levels of pfH following the use of CPB. These results will be compared to existing laboratory-based methods for determining red blood cell damage to predict CPB assist device safety. Further, results from the studies described in this proposal will help develop therapeutic strategies to benefit patients by early detection of pfH and clearance protein levels that occur during CPB.

Type: Observational

Start Date: Mar 2022

open study

Aerobic exercise and physical activity improve patient health in patients in a variety of aspects of life and disease. It also improves patients' mental well-being and quality of life. However, the safety of this physical activity and its potential benefits remain uncertain for patients after aortic dissection, a tear in the main blood vessel delivering blood to all of the body's organs. The goal of this study is to facilitate the translation of pre-clinical findings by the Principal Investigator and published literature that demonstrates light to moderate exercise is safe and beneficial in patients with thoracic aortic dissection. This will be accomplished by using both imaging-based analyses of aortic wall responses to a 3- month exercise program, patient surveys of quality of life metrics, functional fitness assessments, and clinical outcomes.

Type: Interventional

Start Date: May 2023

open study

RADIANT is a network of 14 clinical sites and several laboratories dedicated to the study of atypical diabetes. The objective of this study is to define new forms of diabetes and the unique mechanisms underlying these forms of atypical diabetes. The specific aims are to: 1. Identify and enroll individuals and families with undiagnosed rare and atypical forms of diabetes. 2. Determine the etiologic basis of the metabolic disorder among individuals and families with novel forms of rare and atypical diabetes. 3. Understand the pathophysiology of individuals and families with novel forms of rare and atypical forms of diabetes.

Type: Observational

Start Date: Sep 2020

open study

The NACTN Spinal Cord Injury Registry is a network of clinical centers collecting de-identified data from patients admitted through the Emergency Department of a NACTN center at the time of injury with an initial (first time) spinal cord injury (SCI). Information will be collected on the natural history of SCI and course of treatment through the first 12 months from the date of injury or long as medically indicated. Data collected includes imaging information from CT or MRI scans, neurological and general medical outcome and rehabilitation evaluation. No intervention is given other than standard of care for spinal cord injury, intensive monitoring and frequent follow up care.

Type: Observational

Start Date: Jul 2005

open study