Study summary · research use only
[Porphyrias-what is verified?]
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
This review discusses porphyrias, caused by enzyme defects in heme biosynthesis, in human patients, categorized into acute/non-acute and hepatic/erythropoietic forms. Acute hepatic porphyrias — AIP, VP, HCP, and ALADP — are described as involving accumulation of ALA and PBG, associated with abdominal, psychiatric, neurological, or cardiovascular symptoms, with skin photosensitivity in VP and less often HCP. Diagnosis is described as requiring a >4-fold elevated urinary ALA (ALADP) or ALA and PBG, with first-line treatment including intensive care, pain management, caloric support, and trigger avoidance, plus heme therapy for worsening neurological symptoms. Non-acute porphyrias — PCT, EPP, and XLP — involve skin/liver porphyrin accumulation; described treatments include iron depletion, low-dose chloroquine, hepatitis C elimination, and afamelanotide, which the abstract associates with better sunlight tolerance in EPP and XLP patients.
Abstract
Porphyrias are caused by enzyme defects of heme biosynthesis. According to their clinical presentation and to each affected pathway, they are categorized into acute and non-acute as well as hepatic and erythropoietic porphyrias. Acute hepatic porphyrias, e.g. acute intermittent porphyria (AIP), porphyria variegata (VP), hereditary coproporphyria (HCP) and 5‑aminolevulinic acid dehydratase-deficient porphyria (ALADP) are characterized by accumulation of the porphyrin precursors 5‑aminolevulinic acid (ALA) and porphobilinogen (PBG) that correlate with severe abdominal, psychiatric, neurological or cardiovascular symptoms. Additionally, skin photosensitivity can occur in VP and less frequently, in HCP. Decisive for the diagnosis of acute hepatic porphyrias are a >4-fold elevated urinary excretion of ALA in ALADP and ALA and PBG in all other acute porphyrias. First-line treatment of an acute porphyria attack includes intensive care with pain management, sufficient caloric supply, strict avoidance of porphyrinogenic drugs and elimination of other triggering factors. Heme therapy is indispensable in case of developing neurological symptoms and clinical worsening despite first-line measures. Non-acute porphyrias, mainly porphyria cutanea tarda (PCT), erythropoietic protoporphyria (EPP) and X‑linked protoporphyria (XLP) display accumulation of porphyrins in the skin and/or liver resulting in photosensitivity up to possible liver damage. Patients with PCT benefit from iron depletion, low-dose chloroquine treatment and/or hepatitis C virus elimination. Afamelanotide is associated with better sunlight tolerance in patients with EPP and XLP. Moreover, innovative therapies that highly selectively address dysregulated steps of the heme biosynthetic pathway are currently under clinical trial.
pepmg summarizes the peer-reviewed literature and links to every source — it sells nothing, ships nothing, and gives no medical, dosing, or human-use guidance. Don't just trust this summary: follow the citation to its source and read it yourself. Research use only.