Clinical Utility Of Genetic Screening For HLA-B*1301, On Susceptibility To Dapsone Hypersensitivity Syndrome
Trial end date:
SummaryThis Study is to evaluate the utility of prospective HLA-B*1301 screening on the incidence of dapsone hypersensitivity syndrome (DHS) in 3130 previously Dapsone(DDS)-naive patients. Those patients include allergic cutaneous vasculitis, urticaria, psoriasis, acne, bullous skin diseases, sterile pustulosis, leprosy, pneumocystis pneumonia and any other patients who need dapsone administration. The study has two (co-primary) objectives: i) to determine if screening for HLA-B*1301 prior to DDS-containing treatment results in a lower incidence of clinically-suspected DHS versus current standard of care (no genetic screening) and ii) to determine if screening for HLA-B*1301 prior to DDS-containing treatment results in a significantly lower incidence of immunologically-confirmed DHS versus current standard of care (no genetic screening or patch testing). The study consists of up to a 5-day screening period, a randomised observation period (Day 1 through Week 6) and, for subjects experiencing a suspected DHS and a subset of DDS-tolerant subjects, an epicutaneous patch test (EPT) assessment period. Eligible subjects will be randomised to one of two study arms: a Current Standard of Care Arm (no prospective genetic screening: Control) and a Genetic Screening Arm (prospective genetic screening: Case). Subjects identified as HLA-B*1301 positive in the prospective Genetic Screening Arm will not receive dapsone and will be excluded from further study. Subjects who experience suspected DHS during the 6-week observation would be withdrawn from dapsone and undergo EPT patch testing 6 weeks later.
Accepts Healthy Volunteers?No
Shandong Provincial Institute of Dermatology and Venereology
Dezhou People's Hospital
Dezhou People's Hospital,Shandong
Dongying People's Hospital,Shandong
Jinan Central Hospital
Jinan City Dermatology Hospital Prevention and Treatment
Jinan Military General Hospital
Jining City Dermatology Hospital Prevention and Treatment
Laiwu City Dermatology Hospital Prevention and Treatment
Liaocheng People's Hospital
Linyi City Dermatology Hospital Prevention and Treatment
Qingdao Center Medical Group
Qingdao Hiser Medical Group
Rizhao City Dermatology Hospital Prevention and Treatment
Shandong Jining No. 1 People's Hospital
Shandong Jining No.1 People's Hospital
Shandong Provincial Hospital
Shandong Qianfo Hospital
Weifang City Dermatology Hospital Prevention and Treatment
- Diagnosed with cutaneous vasculitis, urticaria, psoriasis, acne, bullous skin
diseases, sterile pustulosis, leprosy, pneumocystis pneumonia and any other patients
who need dapsone administration.
- Subjects are dapsone-naive.
- All subjects must have a clinical need for treatment with dapsone that precedes the
decision to participate in the study.
- All subjects are willing to complete the 6-weeks period clinical trial.
- All subjects are written informed consent.
- Has previously received Dapsone therapy.
- The subject or any of their healthcare providers is aware of the subjects HLA type.
- Has been diagnosed with Glucose-6-phosphate dehydrogenase deficiency or methemoglobin
- Satisfies any contraindications or restrictions to Dapsone therapy as listed in the
- Current severe illness, including heart, liver and renal failure, major organ
allograft, malignancy requiring parenteral chemotherapy that can not be discontinued
for the duration of the trial, or any other conditions which, in the opinion of the
Investigator, would make the patient unsuitable for the study.
- Any laboratory abnormality at Screening which, in the opinion of the Investigator,
should preclude the subject's participation in the study [alanine aminotransferase
(ALT), glutamic oxaloacetic transaminase(ALT), et al).
- Pregnant women or women who are breastfeeding.
- Subject is, in the opinion of the Investigator, unable to complete the 6 week
Observation period and the EPT assessments as required.
- A positive result for HLA-B*1301 in those subjects randomised to the genetic screening