California Paid Clinical Trials

This study is to evaluate how safe and effective ritlecitinib is in participants with non-segmental vitiligo (NSV). Ritlecitinib is studied in patients with non-segmental vitiligo. Vitiligo is a chronic acquired depigmentation disorder characterized by well-defined pale white patches of skin. Non-segmental vitiligo is an autoimmune disorder and is the focus of this study. The study will show: * if the repigmentation (the recovery of pigmentation) achieved in study B7981040 (also called the "parent study") will stay the same or will further increase if you keep receiving the same study medicine (ritlecitinib 50 milligrams or placebo) * Or if more repigmentation can be achieved if you start receiving ritlecitinib 100 milligrams in this study * Or how long the repigmentation achieved during the parent study lasts if you start receiving placebo in this study. This study is seeking for participants who: * have non-segmental vitiligo (either active or stable) and * received ritlecitinib or placebo for 52 weeks in the parent study. A placebo looks exactly like the study capsule but does not contain any medicine in it. All participants in this study will receive the study medicine or placebo. The study medicine (ritlecitinib 50 milligrams or 100 milligrams) or placebo are capsules that are taken by mouth at home every day. At week 4 (or if it cannot be done then, at week 8) study visit, you must take the medication at the study site, and not at home. Participants may receive the study medicine or placebo for up to 52 weeks. The study will look at the experiences of people receiving the study medicine. This will help see if ritlecitinib is better for treating vitiligo. Participants will be involved in this study for a maximum of 60 weeks. During this time, they will have 9 study visits during the study. Ritlecitinib 50 mg is an approved drug for the treatment of severe Alopecia Areata (a disease with similar abnormal changes in the body functions like vitiligo) in the US, EU and Japan. China, Great Britain and other market applications are pending. Read Less

Treponema pallidum is a bacterium that causes the disease syphilis. The primary objective of the study is to evaluate the testing performance of two diagnostic molecular techniques \[quantitative polymerase chain reaction (qPCR) and transcription-mediated amplification (TMA)\] for the detection of Treponema pallidum in maternal and neonatal specimens from participants with the diagnosis of syphilis using the Centers for Disease Control's (CDC's) Sexually Transmitted Infections (STI) Treatment Guidelines for adult and congenital syphilis. Read Less

The purpose of this study is to learn about the safety and effects of the study medicine ritlecitinib for the possible treatment of nonsegmental vitiligo. Vitiligo causes white patches on your skin when the cells that give your skin color are destroyed. Nonsegmental means that it can affect both sides of the body such as both knees and both hands. Ritlecitinib has been tested in earlier clinical studies and has a favorable safety profile. At present there are no approved medications taken by mouth to treat nonsegmental vitiligo. This study is seeking participants who: * Are 18 years of age or older. * are confirmed to have nonsegmental vitiligo for at least 3 months. * Are willing to stop all other treatments that they may be taking for vitiligo. In this study participants will be chosen by chance, like drawing names out of a hat to receive 1 of 3 treatments: •Part I where two different amounts of ritlecitinib (50 mg and 100 mg) are taken once daily. It will be compared to placebo. Placebo is a dummy capsule. It doesn't have any medicine used in the study. Participants receiving placebo who have not responded to treatment after 52 weeks will be given 100 milligrams or 50 milligrams of ritlecitinib for the remaining 52 weeks of the study. • In Part II, participants will only receive 100 milligrams of ritlecitinib. About 1000 participants will take part in Part I and around 450 in Part II globally. The study will compare the experiences of people receiving ritlecitinib to those of the people who do not. This will help see if ritlecitinib is safe and effective. People in Part I will be in this study for about 26 months and people in Part II will be in this study for about 14 months. During the study, participants in part I will need to visit the study site at least 17 times. In part II, participants will visit at least 11 times. Participants will undergo various tests and procedures such as: * vitiligo rating, * physical examinations, * hearing tests, * blood tests, * x-ray, * ECG, * photographs of areas with vitiligo. Participants will be asked to complete questionnaires about their vitiligo. Read Less

Obesity, affecting 40% of US adults and costing 173b annually, represents a significant health care burden (1). It is associated with increased risk for multiple chronic diseases including hypertension, type 2 diabetes (T2D), cardiovascular disease, and NAFLD, as well as cancer, osteoarthritis, and obstructive sleep apnea. The investigators plan to test the hypothesis that tirzepatide, a dual GLP/GIP agonist, improves metabolic health (insulin resistance and regional fat distribution and cardiovascular risk profile) not only by inducing weight loss via GLP1-agonism, but also via beneficial cellular and molecular changes in adipose tissue, given that GIP binds receptors in human fat cells. Based on studies in mice showing that GIP alone or tirzepitide treatment decreases inflammation, increases lipid buffering (fat storage in the fat cells instead of releasing it into the bloodstream), and improves glucose homeostasis. The investigators believe that the GIP component of tirzepatide will make fat cells healthier and reverse lipotoxicity, which is one of the mechanisms by which obesity leads to insulin resistance, disordered regional fat distribution, and type 2 diabetes. To date, the effect of dual GLP1 and GIP agonist treatment on adipose tissue has not been evaluated in humans. Given the existing but limited data, dual GIP/GLP-1 agonist treatment in obese humans with metabolic risk factors is an attractive pharmacologic candidate that would lead to both weight loss and healthier fat, potentially offering uniquely powerful synergistic clinical benefits. It is thus of tremendous importance to define the biological effects of dual-agonist treatment on human adipose tissue structure and function, as well as related improvements in regional fat distribution and systemic adipose and muscle insulin sensitivity. In this study, the investigators will randomize overweight (with risk factors) or obese nondiabetic individuals to hypocaloric diet or tirzepatide for 22 weeks with matched weight loss for the first 6 weeks. The investigators will quantify insulin resistance, fat and lean mass, including regional fat distribution, and changes in adipose tissue (needle biopsy from abdominal fat tissue) to see if tirzepatide effects differ from dietary weight loss. Read Less

The investigators are studying the pathophysiologic links between obesity, insulin resistance (IR), adipose tissue infection, and post-acute sequelae of COVID-19 (PASC). This study looks at whether adipose (fat) tissue contributes to PASC by driving chronic inflammation or by serving as a reservoir for SARS-CoV-2 persistence. The results will not only determine whether obesity and IR are risk factors for PASC, but will also define fundamental biology that sets the stage for the investigation of novel or existing therapies that target the causal pathways identified. Read Less

The goal of this clinical trial is to test whether one minute of stair stepping at a comfortable pace can reduce blood sugar after meals. The main objectives of the study are: Compare continuously measured post-meal glucose after stair-stepping to control condition Compare continuously measured post-meal glucose after stair-stepping between meals Assess interaction between condition and meal to determine if the effect of stair-stepping on post-meal glucose depends on meal Participants will be in the study for 10 days and will be asked to: Wear a continuous glucose monitor over the course of the study Perform either one minute of comfortable pace stair stepping 15 min after each meal OR no exercise 1 hour after eating a meal on alternating days Perform a dietary recall every two days Perform no exercise within one hour after each meal on any day during the study Consume no calories within one hour after each meal during the study Read Less

The overall aim of this study is to see whether long-term electrical stimulation with a home-stimulation device works well and is safe for the treatment of open-angle glaucoma. Open-Angle Glaucoma is a disease where the nerves in the back of your eye die off faster than expected regardless of your eye pressure. Read Less

The overall aim of this study is to see whether long-term electrical stimulation with a home-stimulation device works well and is safe for the treatment of open-angle glaucoma. Open-Angle Glaucoma is a disease where the nerves in the back of your eye die off faster than expected regardless of your eye pressure. Read Less

The primary objective is to establish the efficacy of intra-arterial (IA) mechanical thrombectomy (MT) with extracranial proximal carotid artery acute stenting versus non-stenting approaches in patients with acute ischemic stroke (AIS) from intracranial vessel occlusion (IVO) in the anterior circulation and have a proximal carotid occlusive disease (occlusion or severe stenosis). Read Less

This is a prospective, multicenter clinical trial in subjects with newly diagnosed high-risk neuroblastoma to evaluate the efficacy and safety of administering naxitamab with standard induction therapy. The initial chemotherapy will include 5 cycles of multi-agent chemotherapy. Naxitamab will be added to all 5 Induction cycles. We hypothesize that the addition of anti-GD2 therapy to induction chemotherapy will result in improved end of induction responses and improved survival. Read Less

This pilot trial compares drug exposure levels using a new method for dosing vincristine in infants and young children compared to the standard dosing method based on body surface area (BSA) in older children. Vincristine is an anticancer drug used to a variety of childhood cancers. The doses anticancer drugs in children must be adjusted based on the size of the child because children vary significantly in size (height, weight, and BSA) and ability to metabolize drugs from infancy to adolescence. The dose of most anticancer drugs is adjusted to BSA, which is calculated from a patient's weight and height. However, infants and young children have more severe side effects if the BSA is used to calculate their dose, so new dosing models have to be made to safely give anticancer drugs to the youngest patients. This new method uses a BSA-banded approach to determine the dose. Collecting blood samples before and after a dose of the drug will help researchers determine whether this new vincristine dosing method results in equivalent drug levels in the blood over time in infants and young children compared to older children. Read Less

Osteogenesis imperfecta (OI) is a group of congenital and heritable bone disorders that currently affects at least 50,000 people in the United States. OI varies in severity from perinatally lethal to mild forms. The majority of cases is caused by a dominant mutation in type I collagen genes (COL1α1 and COL1α2), altering the quantity or quality of type I collagen. Although OI is typically characterized as a disease of the bone, it is perhaps more accurately described as a connective tissue disorder. Type I collagen is a major constituent of lung connective tissue. Respiratory insufficiency is the leading cause of death in patients with OI. Thus, it is important and necessary to understand the etiology of the restrictive pulmonary physiology in the OI population. Read Less