Active clinical trials for "Porphyria, Acute Intermittent"

This is a Phase I trial aimed to determine the safety of the investigational gene therapy product (rAAV2/5-PBGD) for the treatment of Acute Intermittent Porphyria (AIP). Up to eight patients fulfilling the eligibility criteria will participate in this multicentre, open label, single dose, dose-ranging Phase I clinical trial. The enrolled patients will be followed up to assess the safety profile of the investigational gene therapy product and to establish the maximum therapeutic safe dose to be administered in future confirmatory/pivotal clinical trial(s). In addition, the biological and clinical response to the treatment with rAAV2/5-PBGD in AIP patients will be assessed. A complete evaluation of the clinical (symptoms and quality of life assessment) and laboratory (blood and urine) data will be performed.

Acute intermittent porphyria (AIP) is an autosomal dominant inherited disease, which is relatively prevalent in northern Norway with a total of around 90 patients. This provides us with a special opportunity to study AIP. AIP is caused by a mutation in the porphobilinogen deaminase, an enzyme in the haem synthesis. AIP presents symptoms, particularly among fertile women and older men. Typical symptoms are abdominal pain and dark red urine, nausea, vomiting, constipation, muscle weakness and nerve damage including paraesthesia and even paresis. This is known as symptomatic or manifest AIP (MAIP). Others do not display symptoms, so-called latent AIP (LAIP). AIP attacks may be triggered by a host of medicaments which affect the haem synthesis, infections, alcohol and stress. Treatments of manifestations include high sugar intake (4 sugar lumps/hour), alternatively administer glucose and Normosang (synthetic haem arginate) by intravenous injection and removing triggering factors. Diet, glucose intake, dental health and inflammatory parameters will be examined. This study can provide new knowledge about why only some people develop symptoms of AIP. Main hypothesis: There are differences in the diet, iron status, inflammation and glucose metabolism of the MAIP group vs. the LAIP group and the control group.

The long term objective of the research is to identify new biomarkers of disease activity in the human acute porphyrias. This pilot study is intended to provide pilot and feasibility data needed to plan larger and more definitive future studies.

Cycle Pharmaceuticals Ltd. (Cycle) is developing an oral tablet formulation of Chlorpromazine Hydrochloride and intends to conduct bioequivalence trials to demonstrate its similarity to the RLD. The aim of this pilot study is to investigate intrasubject variability in the bioavailability of Chlorpromazine Hydrochloride 25 mg sugar coated tablets. Cycle aims to demonstrate that Chlorpromazine Hydrochloride has a shallow dose response curve and a wide safety margin. This will then allow for the modification of bioequivalence acceptance criteria in future pivotal studies which will reduce the number of participants required whilst still maintaining assurance of safety and efficacy. Pilot Subjects (n): 20 Periods: 2 (2xR) Dosing: Single-dose Strength: 25 mg Test Product: N/A Reference: USL PHARMA Chlorpromazine Hydrochloride Analytes (in plasma): Chlorpromazine; 7-Hydroxychlorpromazine Bioequivalence based on 90% CI (Cmax, AUC): Standard; 80.00 - 125.00%

The purpose of this study is to test whether a focused questionnaire and laboratory tests can better define risk factors associated with possible genetic porphyria. The investigators hypothesize that the genetic carrier state of acute porphyria is distinctive enough that the Genetic Carrier Profile the investigators devise through this study will be useful in identifying carriers of genetic porphyria among the large population with undiagnosed abdominal pain.

This is an observational prospective study that will allow evaluating the clinical and laboratory parameters evolution of at least eight patients with AIP. This study will allow establishing a baseline for the evaluation of the eight patients that are planned to be included in a gene therapy clinical trial (AAVPBGD-AIP-001) for the AIP treatment using a rAAV5-AAT-cohPBGD expression. Patients fulfilling the study inclusion criteria will undergo a clinical and laboratory evaluation for a minimum of 6 months (with one inclusion visit, one final visit and at least two visits of follow up) up to a maximum of 24 months until their inclusion in the subsequent clinical trial. A complete evaluation of the clinical (symptoms and quality of life assessment) and laboratory (blood and urine) data will be collected.

This study will use specific diagnostic tests on a group of patients who are experiencing symptoms typical of acute hepatic porphyria (AHP) to determine how many have the condition, and to potentially help improve the diagnostic process for patients in the future.