False-positive results using a Gaucher diagnostic kit--RecTL and N370S

Area of Science:

• Genetics
• Molecular Diagnostics
• Biochemistry

Background:

• Gaucher disease diagnosis relies on identifying mutations in the glucocerebrosidase gene.
• Pronto Gaucher kits are widely used for this purpose.
• These kits may detect a specific allele (RecTL, N370S) resulting from gene recombination.

Purpose of the Study:

• To investigate the accuracy of the Pronto Gaucher kit in detecting the RecTL, N370S allele.
• To determine if the identified RecTL, N370S allele represents a true mutation or a false positive.
• To highlight potential limitations of current diagnostic kits for Gaucher disease.

Main Methods:

• Direct sequencing of the glucocerebrosidase gene.
• Real-time polymerase chain reaction (PCR) for allele detection.

Main Results:

• The RecTL, N370S allele detected by the Pronto Gaucher kit was confirmed as a false positive result.
• Direct sequencing and real-time PCR did not support the presence of this specific allele as a genuine mutation.
• This finding indicates a potential flaw in the diagnostic methodology.

Conclusions:

• The Pronto Gaucher kit may produce inaccurate results for Gaucher disease diagnosis.
• The RecTL, N370S allele is not a valid indicator of Gaucher disease.
• Awareness of potential pitfalls in diagnostic kits is crucial for accurate genetic testing and patient management.