Case22: GT20, Female, India, age of onset is 25 years old

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: N/A

CasePresentingHPOs: N/A

CaseHPOFreeText: Patients were recruited as they presented consecutively from 1996 to 1998 for evaluation of a mucocutaneous bleeding disorder

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: N/A

PlateletAggregation: All patients examined had defective ADP, epinephrine, and collagen induced aggregation and normal ristocetin induced aggregation

CasePreviousTesting: Mutations were detected by the method of single strand conformation polymorphism (SSCP) analysis, followed by nucleotide sequencing and confirmation by restriction fragment length polymorphism (RFLP) assays. The sequences of the primers employed and the reaction conditions for PCR amplification of the exons, adjacent intronic regions, and 50 and 30 untranslated regions of the aIIb and b3 gene

Gene: ITGB3

Variant: NM_000212.2:c.2186_2187insT (p.Ile730His), NM_000212.2:c.2191_2192delinsG (p.Leu731Gly), NM_000212.2:c.2201_2206del (p.743Gly_735Iledel)

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA915940729, CA915940730, CA915940731

gnomAD: N/A

Case2: GT06, Female, India, age of onset is 13 years old

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: N/A

CasePresentingHPOs: N/A

CaseHPOFreeText: Patients were recruited as they presented consecutively from 1996 to 1998 for evaluation of a mucocutaneous bleeding disorder

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: N/A

PlateletAggregation: All patients examined had defective ADP, epinephrine, and collagen induced aggregation and normal ristocetin induced aggregation

CasePreviousTesting: Mutations were detected by the method of single strand conformation polymorphism (SSCP) analysis, followed by nucleotide sequencing and confirmation by restriction fragment length polymorphism (RFLP) assays. The sequences of the primers employed and the reaction conditions for PCR amplification of the exons, adjacent intronic regions, and 50 and 30 untranslated regions of the aIIb and b3 gene

Gene: ITGA2B

Variant: NM_000419.3:c.245dup (p.Gly83ArgfsTer19)

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA915940723

gnomAD: N/A

Case6: GT24, Male, India, age of onset is 10 years old

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: N/A

CasePresentingHPOs: N/A

CaseHPOFreeText: Patients were recruited as they presented consecutively from 1996 to 1998 for evaluation of a mucocutaneous bleeding disorder

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: N/A

PlateletAggregation: All patients examined had defective ADP, epinephrine, and collagen induced aggregation and normal ristocetin induced aggregation

CasePreviousTesting: Mutations were detected by the method of single strand conformation polymorphism (SSCP) analysis, followed by nucleotide sequencing and confirmation by restriction fragment length polymorphism (RFLP) assays. The sequences of the primers employed and the reaction conditions for PCR amplification of the exons, adjacent intronic regions, and 50 and 30 untranslated regions of the aIIb and b3 gene

Gene: ITGA2B

Variant: NM_000419.3:c.2898_2902dup

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA915940725

gnomAD: N/A

Case#: Peretz_1995_proband. 26 y.o. female. Iranian-Jewish

DiseaseAssertion: Glanzmann's Thrombasthenia

FamilyInfo: consanguineous, 1 of 2 brothers were affected (affected was homozygous for variant, unaffected was homozygous for normal, both siblings with no platelet aggregation with ADP, collagen, epinephrine, and normal response to ristocetin. Their clot retraction was absent and the binding of monoclonal antibody (MoAb) 10E5, which recognizes the GPIIb/IIIa complex,26 was minimal.

ParentalGenotype: heterozygous, both

CasePresentingHPOs:

PlateletAggregation: no platelet aggregation in response to adenosine diphosphate, collagen, or epinephrine and had a normal response to ristocetin.

CaseHPOFreeText: moderate mucocutaneous bleeding

CaseNotHPOs:

CaseNotHPOFreeText:

ProteinExpression: heterodimer in transfected COS-7 cells resulted in low peroxidase activity, indicating lack of surface expression of the heterodimer.

CasePreviousTesting:

Method: Testing was through southern blot analysis with restriction enzymes and amplification of fragments

PreviouslyPublished:

Gene: ITGA2B

Variant: 6-bp deletion and 31-bp insertion in exon 25 of the GPIIb gene - altered C-terminal sequence of 105 amino acids starting at Val-825 - substitution of 10 amino acids Leu817-Asn826 by an altered sequence of 8 amino acids

HGVS: NM_000419.5:c.2473_2478delinsTCACCAGGGCCTTCACGTGAGCATGGAGAG

ClinVar:

CAID: CA2581931358

gnomAD: No matching variants found

Case12: Patient ER, gender and age are not specified, all of these patients are Caucasian (either Italian or European)

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: N/A

CasePresentingHPOs: N/A

CaseHPOFreeText: All patients presented with a current or past history of bleeding and a bleeding time >15 min. Bleeding symptoms were evaluated by examining available hospital records. Mild bleeders were defined as those who bled only after trauma or surgery or had minor symptoms, such as epistaxis. Moderate/severe bleeders were defined as those with a history of spontaneous or life threatening hemorrhages, such as gastrointestinal bleeding, or who had repeated episodes requiring platelet transfusions

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: See Table 1

PlateletAggregation: See Table 1

CasePreviousTesting: To identify point mutations responsible for GT, we have sequenced all coding regions of Ib and 3 genes and intron/exon boundaries.

Gene: ITGA2B

Variant: NM_000419.3:c.1912dup

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA915940678

gnomAD: N/A

Case4: Patient ZM, gender and age are not specified, all of these patients are Caucasian (either Italian or European)

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: N/A

CasePresentingHPOs: N/A

CaseHPOFreeText: All patients presented with a current or past history of bleeding and a bleeding time >15 min. Bleeding symptoms were evaluated by examining available hospital records. Mild bleeders were defined as those who bled only after trauma or surgery or had minor symptoms, such as epistaxis. Moderate/severe bleeders were defined as those with a history of spontaneous or life threatening hemorrhages, such as gastrointestinal bleeding, or who had repeated episodes requiring platelet transfusions

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: See Table 1

PlateletAggregation: See Table 1

CasePreviousTesting: To identify point mutations responsible for GT, we have sequenced all coding regions of Ib and 3 genes and intron/exon boundaries.

Gene: ITGA2B

Variant: NM_000419.3:c.693dup

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA915940315

gnomAD: N/A

Case11: Patient LF, gender and age are not specified, all of these patients are Caucasian (either Italian or European)

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: N/A

CasePresentingHPOs: N/A

CaseHPOFreeText: All patients presented with a current or past history of bleeding and a bleeding time >15 min. Bleeding symptoms were evaluated by examining available hospital records. Mild bleeders were defined as those who bled only after trauma or surgery or had minor symptoms, such as epistaxis. Moderate/severe bleeders were defined as those with a history of spontaneous or life threatening hemorrhages, such as gastrointestinal bleeding, or who had repeated episodes requiring platelet transfusions

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: See Table 1

PlateletAggregation: See Table 1

CasePreviousTesting: To identify point mutations responsible for GT, we have sequenced all coding regions of Ib and 3 genes and intron/exon boundaries.

Gene: ITGA2B

Variant: NM_000419.3:c.1912dup

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA915940678

gnomAD: N/A

Case6: Patient FF, gender and age are not specified, all of these patients are Caucasian (either Italian or European)

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: N/A

CasePresentingHPOs: N/A

CaseHPOFreeText: All patients presented with a current or past history of bleeding and a bleeding time >15 min. Bleeding symptoms were evaluated by examining available hospital records. Mild bleeders were defined as those who bled only after trauma or surgery or had minor symptoms, such as epistaxis. Moderate/severe bleeders were defined as those with a history of spontaneous or life threatening hemorrhages, such as gastrointestinal bleeding, or who had repeated episodes requiring platelet transfusions

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: See Table 1

PlateletAggregation: See Table 1

CasePreviousTesting: To identify point mutations responsible for GT, we have sequenced all coding regions of Ib and 3 genes and intron/exon boundaries.

Gene: ITGA2B

Variant: NM_000419.3:c.855dup

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA915940766

gnomAD: N/A

Case1: Female, 26 years old, Iranian-Jewish

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: Pedigree shown in Fig 4 B. One of her brothers was affected by a bleeding disorder of similar severity

ParentalGenotype: Mother and father were heterozygous carriers for the mutation

CasePresentingHPOs: N/A

CaseHPOFreeText: Moderate mucocutaneous bleeding

CaseNotHPOs: N/A

CaseNotHPOFreeText: N/A

ProteinExpression: Immunoblotting showed small amounts of GPIIIa and minute amounts of pro-GPIlb confirming type 1 GT

PlateletAggregation: Absent aggregation in response to ADP, collagen, epinephrine, and had a normal response to risotcetin

CasePreviousTesting: N/A

Gene: ITGA2B

Variant: NM_000419.3:c.2473_2478delinsTCACCAGGGCCTTCACCTCAGCATCCACCAG

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA913184731

gnomAD: N/A

Case21: Patient MC gender and age are not specified

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: N/A

CasePresentingHPOs: Gingival bleeding HP:0000225

CaseHPOFreeText: N/A

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: <12% of normal

PlateletAggregation: N/A

CasePreviousTesting: N/A

Gene: ITGA2B

Variant: M_000419.3:c.3060+2T>C and NM_000419.3:c.3094dup

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA290944108 and CA915940756

gnomAD: MAF in the European (non-Finnish) population is 0.00003876 https://gnomad.broadinstitute.org/variant/17-42451720-A-G

PreviouslyPublished: References 34-36

Case1: (Patient JO) Female, 38 years old, Japanese

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: Parents shown Fig 6

CasePresentingHPOs: HP:0000978, HP:000042, HP:0000132

(Easy bruising, epistaxis, menorrhagia)

CaseHPOFreeText: N/A

CaseNotHPOs: N/A

ProteinExpression: Figure 6 shows surface expression

Platelet Aggregation: Absent aggregation in response to ADP, epinephrine, collagen and thrombin however normal response to ristocetin

CasePreviousTesting: Total cellular RNA was obtained, and aIIbb3 mRNAs were specifically amplified by reverse transcription PCR (RT-PCR) as previously described (41).

Gene: ITGA2B

Variant: NM_000419.3:c.575_576insGGACAA (went over with Shruthi)

LegacyVariant: N/A

ClinVar: N/A

CAiD: CA915940650

gnomAD N/A

Case7: Patient FO

DiseaseAssertion: Glanzmann thrombasthenia

FamilyInfo: N/A

ParentalGenotype: N/A

CasePresentingHPOs:

CaseHPOFreeText: N/A

CaseNotHPOs: N/A

CaseNotHPOsFreeText: N/A

ProteinExpression: N/A

PlateletAggregation: N/A

CasePreviousTesting: The amplification of DNA fragments using PCR and their electrophoretic migration through a denaturing gradient was used to scan the entire coding region, splice site junctions and promoter regions of the GPIIb and GPIIIa genes for all 20 patients in this study

Gene: ITGA2B

Variant: NM_000419.3:c.2153dup and NM_000419.3:c.1234G>A (p.Gly412Arg)

LegacyVariant: (p.Gly381Arg)

ClinVar: 381748

CAiD: CA913189170 and CA8603182

gnomAD MAF in the Latino population is 0.0001453 https://gnomad.broadinstitute.org/variant/17-42458406-C-T