PXD061996

PXD061996 is an original dataset announced via ProteomeXchange.

Title	A Mass Spectrometry-based Multiplexed Targeted Assay for Detection of Hemoglobinopathies from Dried Blood Spots
Description	Hemoglobinopathies are the most common inherited disorders worldwide. Accurate analysis of hemoglobin variants is critical for diagnosis of hemoglobinopathies. Although high-performance liquid chromatography and capillary zone electrophoresis are widely used as screening tools, they possess inherent ambiguities that often preclude accurate detection of hemoglobin variants. Our goal was to develop and optimize a sensitive and specific mass spectrometry-based assay for screening and diagnosis of hemoglobinopathies. A catalog of canonical globin-chain specific peptides as well as mutant peptides corresponding to common hemoglobin variants was generated and their corresponding “heavy” synthetic peptide versions were used as internal standards for quantification and calculation of globin chain ratios. Targeted mass spectrometry analysis was performed by coupling liquid chromatography to a triple quadrupole mass spectrometer, which is the commonest mass spectrometer employed in clinical diagnostics. Dried blood spots from a cohort of 716 individuals (including 211 patients with hemoglobinopathy) were analyzed. The α:β-globin ratios showed a significant difference between normal and β-thalassemia patients, particularly when the disease was homozygous or admixed with structural variants (compound heterozygous). The method presented here permits identification of variants in their homozygous, heterozygous or compound heterozygous states. The intra- and inter-assay precision CV were both <20%. We envision that such mass spectrometry-based assays could be employed as first-line screening assay for hemoglobin variants including sickle cell disease as well as thalassemias.
HostingRepository	PRIDE
AnnounceDate	2025-08-01
AnnouncementXML	Submission_2025-08-01_14:50:16.851.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Akhilesh Pandey
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	6x(13)C; 6x(13)C; iodoacetamide derivatized residue
Instrument	TSQ Altis

Revision	Datetime	Status	ChangeLog Entry
0	2025-03-18 12:29:37	ID requested
⏵ 1	2025-08-01 14:50:17	announced

Dataset with its publication pending

submitter keyword: Hemoglobinopathy, SRM, Thalassemia, screening, stable isotope labeled standard, Structural variants, LC-MS/MS

Dr. Akhilesh Pandey
contact affiliation	Department of Laboratory Medicine and Pathology, Center for Individualized Medicine, Mayo Clinic, Rochester, MN 55905
contact email	pandey.akhilesh@mayo.edu
lab head
Akhilesh Pandey
contact affiliation	Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905
contact email	pandey.akhilesh@mayo.edu
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD061996
     1. Label: PRIDE project
     2. Name: A Mass Spectrometry-based Multiplexed Targeted Assay for Detection of Hemoglobinopathies from Dried Blood Spots