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Alpha-antitrypsin deficiency. Experience from an autopsy material.

Acta Pathologica Et Microbiologica Scandinavica. Section A, Pathology

|September 1, 1977

Summary

Alpha-1-antitrypsin deficiency (PiZ genotype) was identified in 6.3% of autopsy cases. This genetic condition was linked to increased pulmonary emphysema, with less pronounced liver changes than previously observed.

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Area of Science:

Medical Genetics
Pulmonology
Hepatology

Background:

Alpha-1-antitrypsin deficiency (AATD) is an inherited disorder that can lead to lung and liver disease.
The PiZ genotype is the most common severe genetic variant associated with AATD.
Understanding the prevalence and clinical manifestations of PiZ AATD in autopsy populations is crucial for disease management.

Purpose of the Study:

To determine the prevalence of the PiZ genotype in an autopsy series.
To investigate the association between PiZ AATD and pulmonary or hepatic changes in deceased individuals.

Main Methods:

Screening of hepatic tissue from 238 autopsy cases using diastase digestion and PAS staining.
Immunoperoxidase staining to identify alpha-1-antitrypsin globules.
Genotyping for Alpha-1-antitrypsin deficiency (PiZ).

Main Results:

The PiZ genotype was identified in 15 individuals (6.3%) within the autopsy series.
One individual was estimated to be homozygous and 14 were heterozygous for PiZ AATD.
Pulmonary emphysema was more frequently observed in heterozygous PiZ individuals compared to previous findings.
Hepatic changes in heterozygous PiZ individuals were less pronounced than anticipated.

Conclusions:

The PiZ genotype of Alpha-1-antitrypsin deficiency occurs in a notable proportion of autopsy cases.
PiZ AATD is associated with an increased risk of pulmonary emphysema.
The severity of hepatic manifestations in heterozygous PiZ AATD may be overestimated in some contexts.

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