DNA & genetic tests
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57.48

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47.5

Acute intermittent porphyria / AIP 6 variants (HMBS-related) - Cat

DNA panel for six HMBS variants that can cause acute intermittent porphyria (AIP/Feline AIP) in cats.

Turnaround time
10 workdays
test Methods
Sequencing
Test code
PVT-78DC9C02B3E2
Species
Cat
Matrices
Blood (EDTA), Blood (Heparin), Semen, Swab, Tissue

Overview

About acute intermittent porphyria

Acute intermittent porphyria (AIP), also known as Feline AIP, is an inherited disorder of heme synthesis in cats. The HMBS gene encodes hydroxymethylbilane synthase, an enzyme required for producing heme, an essential component of hemoglobin and other proteins.

Cats with AIP may develop brown discoloured teeth that fluoresce pink under UV light. Reddish-brown urine, discoloured bones, acute abdominal pain, vomiting and systemic illness can also occur. The condition can resemble congenital erythropoietic porphyria (CEP), so DNA testing helps separate the underlying genetic cause.

What does this panel test?

This analysis tests six known HMBS variants: c.189dupT, c.842_844delGAG, c.445C>T, c.250G>A, c.826-1G>A and c.107_110delACAG. Most variants act in an autosomal dominant way; c.250G>A is the recessive exception in this panel.

Practical value of this test

  • Diagnostic clarity: helps distinguish AIP genetically from CEP and other causes of brown teeth or porphyrin-like discoloration.
  • Breeding selection: shows whether a cat carries an HMBS variant that can be passed to offspring.
  • Family testing: supports targeted testing of related animals when a variant is present in a line.

Included subanalyses

This analysis includes the following subanalyses:

  • Acute intermittent porphyria (AIP) - variant 1 (HMBS c.189dupT)
  • Acute intermittent porphyria (AIP) - variant 2 (HMBS c.842_844delGAG)
  • Acute intermittent porphyria (AIP) - variant 3 (HMBS c.445C>T)
  • Acute intermittent porphyria (AIP) - variant 4 (HMBS c.250G>A)
  • Acute intermittent porphyria (AIP) - variant 5 (HMBS c.826-1G>A)
  • Acute intermittent porphyria (AIP) - variant 6 (HMBS c.107_110delACAG)

Allele combinations & result interpretations

Sampling and submission guidelines

References