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  • Immunohematology

 

Article | 16-October-2019

Anti-Vel alloimmunization and severe hemolytic disease of the fetus and newborn

The Vel red blood cell (RBC) antigen was first described in 1952.1 The antigen is ubiquitous in the general population, with only 0.04 percent of Caucasian individuals failing to exhibit expression.2 Only rare cases of anti-Vel–associated mild-to-moderate hemolytic disease of the fetus and newborn (HDFN) have been previously reported.3–7 The neonatal manifestation of HDFN in these cases was limited to hyperbilirubinemia requiring only phototherapy. No case of fetal anemia requiring prenatal

K.J. Moise, Y. Morales, M.F. Bertholf, S.N. Rossmann, Y. Bai

Immunohematology, Volume 33 , ISSUE 4, 152–154

Case report | 12-March-2020

Role for serial prenatal anti-Vel quantitative serologic monitoring with 2-ME serum treatment during pregnancy: case report

Anti-Vel is an uncommon antibody to a high-prevalence antigen. Its clinical significance and management in the prenatal setting are not well characterized. We present a case that demonstrates the utility of serial prenatal anti-Vel quantitative serologic monitoring with 2-ME serum treatment during pregnancy. The patient is a 23-year-old Hispanic woman with history of prior pregnancy and prior transfusion who was discovered to have an antibody to the high-prevalence Vel antigen in the first

Walter J. Linz, Judith T. Fueger, Steven Allen, Susan T. Johnson

Immunohematology, Volume 26 , ISSUE 1, 8–10

Article | 30-November-2020

Misidentification of anti-Vel due to inappropriate use of prewarming and adsorption techniques

the reactivity at the IAT. The patient was transfused with two units of washed RBCs and died 6 to 8 hours later. Retrospective testing in our laboratory detected anti-Vel in both pretransfusion and posttransfusion samples. The pretransfusion serum was hemolytic when tested in LISS or with papain-treated RBCs. Weak reactivity (1+) was observed at the IAT. EDTA-treated serum (to prevent C‘-mediated hemolysis) was strongly reactive (3+s) with Vel+ RBCs but compatible with 10 examples of Vel

Jill Storry, Delores Mallory

Immunohematology, Volume 10 , ISSUE 3, 83–86

Article | 13-April-2020

Problems highlighted when using anticoagulated samples in the standard tube low ionic strength antiglobulin test

-activating anti-Vel. In all three cases, the coincidental referral and investigation of both clotted and anticoagulated samples led to the discrepancy in serum and plasma test results becoming apparent. Potential errors in selection of suitable blood for transfusion and appropriate antenatal management were avoided by correct identification of the antibodies present using the clotted samples.

Amanda J Sweeney

Immunohematology, Volume 22 , ISSUE 2, 72–77

Review | 09-October-2019

The Vel blood group system: a review

The blood group antigen Vel has been one of immunohematology’s greatest enigmas: the variation in antigen strength from one individual to another, the property of anti-Vel to readily hemolyze Vel+ red blood cells (RBCs), and the difficulty to screen for sufficient numbers of Vel– blood donors had made Vel a tough nut to crack. In 2013, a small, previously unknown protein called small integral membrane protein 1 (SMIM1) was identified on the RBC by three independent research groups

Jill R. Storry, Thierry Peyrard

Immunohematology, Volume 33 , ISSUE 2, 56–59

Letter to Editor | 14-March-2020

To the Editors: Anti-Vel and cold-reactive autoantibody

Joan L Maurer, Sandra Taddie Nance

Immunohematology, Volume 26 , ISSUE 4, 187–187

Article | 17-November-2020

Elimination of a requirement for Vel-negative red blood cells and successful transfusion following chromium-51 survival study

inconclusive anti-Vel serology with an in vivo recovery study simplified the acquisition of blood for this patient and conserved rare RBC units.

Richard J. Davey, Jo Lynn Procter

Immunohematology, Volume 11 , ISSUE 2, 39–42

Review | 16-October-2019

Clinical significance of antibodies to antigens in the Raph, John Milton Hagen, I, Globoside, Gill, Rh-associated glycoprotein, FORS, JR, LAN, Vel, CD59, and Augustine blood group systems

transfused antigenpositive red blood cells or a transfusion reaction (e.g., anti-P, anti-Jra, and anti-Lan), and/or hemolytic disease of the fetus and newborn (e.g., anti-RHAG4 and anti-Vel)—has been documented. For other antibodies, their prevalence is so rare that information on the clinical significance of their antibodies is not available (e.g., anti-FORS1).

Mostafa Moghaddam, Amir Ali Naghi

Immunohematology, Volume 34 , ISSUE 3, 85–90

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