Expression of CD19 Complex in Lymphoproliferative Disorders

Lymphoproliferative Disorders Clinical Trial

— CD19  

Official title:

Expression of CD19 Complex in Lymphoproliferative Disorders

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT04734470
• Other study ID #: Expression of CD19 complex
• Status: Not yet recruiting
• Start date: March 2021
• Est. completion date: April 2023

Study information

• Verified date: February 2021
• Source: Assiut University
• Contact: Mahran Mohamed Hussein, Assistant Lecturer
• Phone: 01028444857
• Email: Mahran_Morsy[@]med.aun.edu.eg
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

1. To study the expression pattern of CD19(cluster of differentiation antigen19) complex in lymphoproliferative disorders and its diagnostic value. 2. To investigate the biological significance of CD19 complex expression in lymphoproliferative disorders. 3. To explore the possibility of ectopic expression of CD19 complex in non B-lineage lymphoproliferative disorders.

Description:

Lymphoproliferative disorders (LPD)comprise a heterogeneous group of diseases characterized by uncontrolled production of lymphocytes that cause monoclonal lymphocytosis, lymphadenopathy and bone marrow infiltration.They Typically occur in people who have a compromised immune system with highly variable clinical course. Lymphoproliferative disorders are immunomorphologically and clinically heterogeneous. The two major types of lymphocytes are B cells and T cells, which are derived from pluripotent hematopoietic stem cells in the bone marrow. Lymphoproliferative disorders include; Follicular lymphoma, chronic lymphocytic leukemia, acute lymphoblastic leukemia, hairy cell leukemia, Hemophagocytic lymphohistiocytosis (HLH), B-cell lymphomas, T-cell lymphomas, multiple myeloma, Waldenström's macroglobulinemia, Wiskott Aldrich syndrome, Langerhans cell histiocytosis (LCH), Lymphocyte-variant hypereosinophilia, Pityriasis Lichenoides, post-transplant lymphoproliferative disorder, autoimmune lymphoproliferative syndrome (ALPS), Lymphoid interstitial pneumonia, Epstein Barr virus associated lymphoproliferative diseases, Castleman disease and X-linked lymphoproliferative disease. Many patients are asymptomatic at the time of first presentation, with the diagnosis being made as an incidental finding after a routine medical examination or blood test, for example, complete blood count (CBC). Definitive diagnosis is made on the characteristic lymphocyte morphology and immunophenotype usually from samples of peripheral blood ,bone marrow samples or lymph nodes. The membrane receptor proteins (CD19, CD81, CD21 (complement receptor type2) and Leu-13(CD225)), form a complex (CD19 complex) on human B lymphocytes that has costimulatory activity for the antigen receptor, membrane IgM(mIgM) .The complex is unique among known membrane protein complexes of the immune system because its components represent different protein families, and can be expressed individually. The biochemical mechanism by which the complex costimulates is not understood.CD19 has been shown to be a major substrate of a protein tyrosine kinase activated by mIgM, and tyrosine phosphorylated CD19 binds phosphatidylinositol 3-kinase (PI3-kinase), an enzyme that is required for the cellular activating effects of certain receptor tyrosine kinases. Thus, several biochemical pathways may be triggered by the CD21/CD19/CD81/CD225 complex that relate to its role in amplifying the response of B cells to antigen. Multiple biologic effects of the CD21/CD19/ CD81/CD225 complex may reflect the discrete actions of individual components, each of which is a member of a distinct protein family: CD21 of the regulators of complement activation family; CD19 of the Ig superfamily;and CD81 of the tetraspan family of membrane proteins and is an important regulator of B-cell signaling. CD225 of Interferon-induced transmembrane protein (IFITM) family. Although CD19 function may be elicited following its potential binding to an as yet unidentified ligand, C3d binding to CD21 supplies an already characterized ligand for the CD19 complex, thereby linking complement immune responses and the generation of immunological activation and B cell function. Ligation of members of the CD19 complex initiates a cascade of biological responses that can modulate signal transduction through the B cell Ag-receptor complex and other cell surface receptors. So it may help in understanding the signal transduction pathways through this complex.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 92
• Est. completion date: April 2023
• Est. primary completion date: March 2023
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: N/A and older

Eligibility

Inclusion Criteria:

• Patients with acute lymphoproliferative disorders.
• Patients with chronic lymphoproliferative disorders

Exclusion Criteria:

• patients with non lymphoid disorders.

Related Conditions & MeSH terms

• Lymphoproliferative Disorders

Intervention

Diagnostic Test:
• Flow cytometry
The study of CD19 complex expression in lymphoproliferative disorders by flowcytometry

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
Assiut University

References & Publications (13)

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Dasgupta S, Dasgupta S, Bandyopadhyay M. Regulatory B cells in infection, inflammation, and autoimmunity. Cell Immunol. 2020 Jun;352:104076. doi: 10.1016/j.cellimm.2020.104076. Epub 2020 Feb 27. Review. — View Citation

Feingold JM, Ungar DR. DOSAGE REGIMES FOR THE ADMINISTRATION OF AN ANTI-CD19 ADC. US Patent App. 16/622,649; 2020.

Goede V, Fischer K, Busch R, Engelke A, Eichhorst B, Wendtner CM, Chagorova T, de la Serna J, Dilhuydy MS, Illmer T, Opat S, Owen CJ, Samoylova O, Kreuzer KA, Stilgenbauer S, Döhner H, Langerak AW, Ritgen M, Kneba M, Asikanius E, Humphrey K, Wenger M, Hallek M. Obinutuzumab plus chlorambucil in patients with CLL and coexisting conditions. N Engl J Med. 2014 Mar 20;370(12):1101-10. doi: 10.1056/NEJMoa1313984. Epub 2014 Jan 8. — View Citation

Pongas GN, Annunziata CM, Staudt LM. PI3Kd inhibition causes feedback activation of PI3Ka in the ABC subtype of diffuse large B-cell lymphoma. Oncotarget. 2017 Sep 13;8(47):81794-81802. doi: 10.18632/oncotarget.20864. eCollection 2017 Oct 10. — View Citation

Tedder TF, Poe JC, Fujimoto M, Haas KM, Sato S. The CD19-CD21 signal transduction complex of B lymphocytes regulates the balance between health and autoimmune disease: systemic sclerosis as a model system. Curr Dir Autoimmun. 2005;8:55-90. Review. — View Citation

Vaillant AAJ, Stang CM. Lymphoproliferative Disorders. StatPearls [Internet]: StatPearls Publishing; 2020.

van Zelm MC, Reisli I. CD19 Deficiency due to Genetic Defects in the CD19 and CD81 Genes. Humoral Primary Immunodeficiencies: Springer; 2019. p. 83-95.

Yánez DC, Ross S, Crompton T. The IFITM protein family in adaptive immunity. Immunology. 2020 Apr;159(4):365-372. doi: 10.1111/imm.13163. Epub 2019 Dec 22. Review. — View Citation

Zavala-Vega S, Palma-Lara I, Ortega-Soto E, Trejo-Solis C, de Arellano IT, Ucharima-Corona LE, Garcia-Chacón G, Ochoa SA, Xicohtencatl-Cortes J, Cruz-Córdova A, Luna-Pineda VM, Jiménez-Hernández E, Vázquez-Meraz E, Mejía-Aranguré JM, Guzmán-Bucio S, Rembao-Bojorquez D, Sánchez-Gómez C, Salazar-Garcia M, Arellano-Galindo J. Role of Epstein-Barr Virus in Glioblastoma. Crit Rev Oncog. 2019;24(4):307-338. doi: 10.1615/CritRevOncog.2019032655. Review. — View Citation

Zheng YY, Chen G, Zhou XG, Jin Y, Xie JL, Zhang SH, Zhang YN. [Retrospective analysis of 4 cases of the so-called blastic NK-cell lymphoma, with reference to the 2008 WHO classification of tumours of haematopoietic and lymphoid tissues]. Zhonghua Bing Li Xue Za Zhi. 2010 Sep;39(9):600-5. Chinese. — View Citation

* Note: There are 13 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	To study the expression pattern of CD19 complex in lymphoproliferative disorders and its diagnostic value.	Study of CD19 complex expression pattern in lymphoproliferative disorders by flow cytometry	Baseline