PXD041248

PXD041248 is an original dataset announced via ProteomeXchange.

Title	immune thrombocytopenia in sitosterolemia is driven by lipid disorder and not proteomic aberrations
Description	Sitosterolemia is a rare autosomal-recessive genetic disorder in which patients develop hypercholesterolemia, and abnormal hematologic and/or liver function tests. In this disease, dysfunction of either ABCG5 or ABCG8 results in intestinal hyperabsorption of all sterols, including cholesterol and more specifically plant sterols or xenosterols, as well as in the impaired ability to excrete xenosterols into the bile. It remains unknown how and why some patients develop hematologic abnormalities. Only a few unrelated patients with hematologic abnormalities at the time of diagnosis have been reported. Here, we report on two unrelated pedigrees who were believed to have chronic immune thrombocytopenia as most prominent feature. Both consanguineous families showed recessive gene variants in ABCG5, that were associated with disease by in-silico protein structure analysis as well as clinical segregation. Thrombopoietin levels and megakaryocyte numbers in bone marrow were normal. Metabolic analysis confirmed the presence of strongly elevated plasma levels of xenosterols. Potential platelet proteomic aberrations were longitudinally assessed following dietary restrictions combined with the administration of the sterol absorption inhibitor ezetimibe. No significant effects on platelet protein content before and after onset of treatment were demonstrated. In sum, our data suggest a defect in proplatelet release in our patients with sitosterolemia.
HostingRepository	PRIDE
AnnounceDate	2024-10-22
AnnouncementXML	Submission_2024-10-22_06:45:22.548.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Jessica Del Castillo
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	acetylated residue; iodoacetamide derivatized residue
Instrument	Orbitrap Fusion

Revision	Datetime	Status	ChangeLog Entry
0	2023-03-31 03:49:39	ID requested
1	2024-06-15 23:45:33	announced
⏵ 2	2024-10-22 06:45:23	announced	2024-10-22: Updated project metadata.

Del Castillo J, Tool ATJ, van Leeuwen K, van Alphen FPJ, Brands MM, Suijker MH, Meijer AB, Hoogendijk AJ, Kuijpers TW, Platelet proteomic profiling in sitosterolemia suggests thrombocytopenia is driven by lipid disorder and not platelet aberrations. Blood Adv, 8(10):2466-2477(2024) [pubmed]

10.1182/bloodadvances.2023012018;

submitter keyword: sitosterolemia,platelet proteomics

Sander Meijer
contact affiliation	Sanquin Research
contact email	s.meijer@sanquin.nl
lab head
Jessica Del Castillo
contact affiliation	Sanquin Research
contact email	j.del.castillo.az@gmail.com
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD041248
     1. Label: PRIDE project
     2. Name: immune thrombocytopenia in sitosterolemia is driven by lipid disorder and not proteomic aberrations