Clinical Research Directory

Natural History of the Collagen-Related Disorder Osteogenesis Imperfecta and Genotype Phenotype Correlation

Background: Osteogenesis Imperfecta (OI) is a connective tissue disorder. OI affects many aspects of a person s health and growth. It can cause frequent fractures, short stature, and bowing of the long bones. There is no known cure for OI so researchers want to learn more about it. Objectives: To obtain a natural history of the course of OI. To find changes in genes that affect the disease. Eligibility: People from birth to age 12 years with certain types of OI People who previously had childhood data collected in certain other protocols Design: Participants will stay in the clinic for a few days each visit. Visits will be about every 3-4 months to age 5 then about every 6-12 months. Visits may include: Medical history Physical exam Hearing test Dental exam Blood, urine, and heart tests Breathing measured while wearing a clear plastic hood for about 30 minutes Tests of motion, strength, and motor skills X-rays of the left hand, chest, legs, and spine Bone density scan. Participants will lie on a flat table while a very small dose of x-rays is passed through the body. Computed tomography and magnetic resonance imaging scans. Participants will lie on an exam table that moves in and out a scanner. Breathing tests using stickers on the chest, a light probe on a finger or foot, and a face mask Ultrasound of the kidneys, ureters, and bladder Questionnaires A small section of skin removed from the arm or thigh For some tests, participants may take medicine to make them sleepy. Participants may give separate consent for photos to be taken.

Vosoritide for Selected Genetic Causes of Short Stature

Short stature can be caused by a number of genetic etiologies, many of which directly affect the growth plate. The FGFR3/CNP pathway is central to growth of the chondrocyte. The study team hypothesizes that patients with selected genetic causes of short stature that interact with this pathway will benefit from treatment with vosoritide, a CNP analog, a selective NPR-B agonist which directly targets the growth plate. This study will enroll patients with short stature in selected genetic categories and will follow them for a 6 month observation period to obtain a baseline growth velocity, safety profile and quality of life assessment. Patients will then be treated with vosoritide for 12 months and will be assessed for safety monitoring and improvement in height outcomes.

Oral Manifestations in Egyptian Children With Short Stature

Children with short stature have been reported to show a higher prevalence of enamel hypoplasia, delayed tooth eruption, and malocclusion compared to children of normal growth status

The Dosage Exploration Study of PEG-rhGH for Treating Short Stature in Prepubertal and Pubertal Children

This study is dedicated to addressing the lack of research on the most effective dosage of long-acting growth hormone for children with short stature. By employing clinical trial design, we are committed to investigating the therapeutic benefits and safety profiles associated with varying doses of long-acting growth hormone. Our ultimate goal is to offer clinicians more precise treatment guidance and assist patients in attaining optimal growth and developmental outcomes.

Vosoritide for Short Stature in Turner Syndrome

Turner syndrome (TS) is characterized by a missing whole or part of the second sex chromosome in a phenotypic female, resulting in short stature due to haploinsufficiency of the short-stature homeobox-containing (SHOX) gene. Growth hormone (GH) is an approved therapy for this condition, although not associated with GH deficiency, and benefits are modest. Vosoritide, a C-type natriuretic peptide (CNP) analog, targets chondrocytes within the growth plate leading to increased cell proliferation and hypertrophy. We hypothesize that patients with TS and short stature will respond to vosoritide treatment leading to increased growth velocity. This study will enroll pre-pubertal girls with TS who are either naïve to GH or have had a poor response to GH therapy. All subjects will be treated with vosoritide for 12 months and will be assessed for safety monitoring and improvement in height outcomes. Annualized growth velocity (AGV) on vosoritide will be compared to AGV in the 6-18 months prior to initiation of vosoritide based on historical data available in the medical record. Subjects with a positive response to therapy will be given the option to continue in the extension phase of the study during which they will continue to receive vosoritide until growth cessation.