CD38

Source: Wikipedia, the free encyclopedia.
CD38
Gene ontology
Molecular function
Cellular component
Biological process
Sources:Amigo / QuickGO
Ensembl
UniProt
RefSeq (mRNA)

NM_001775

NM_007646

RefSeq (protein)

NP_001766

NP_031672

Location (UCSC)Chr 4: 15.78 – 15.85 MbChr 5: 44.03 – 44.07 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

CD38 (

B lymphocytes and natural killer cells. CD38 also functions in cell adhesion, signal transduction and calcium signaling.[6]

In humans, the CD38 protein is encoded by the CD38

paralog of CD157, which is also located on chromosome 4 (4p15) in humans.[9]

History

CD38 was first identified in 1980 as a surface marker (cluster of differentiation) of thymus cell lymphocytes.[10][11] In 1992 it was additionally described as a surface marker on B cells, monocytes, and natural killer cells (NK cells).[10] About the same time, CD38 was discovered to be not simply a marker of cell types, but an activator of B cells and T cells.[10] In 1992 the enzymatic activity of CD38 was discovered, having the capacity to synthesize the calcium-releasing second messengers cyclic ADP-ribose (cADPR) and nicotinic acid adenine dinucleotide phosphate (NAADP).[10]

Tissue distribution

CD38 is most frequently found on plasma B cells, followed by natural killer cells, followed by B cells and T cells, and then followed by a variety of cell types.[12]

Function

CD38 can function either as a receptor or as an enzyme.[13] As a receptor, CD38 can attach to CD31 on the surface of T cells, thereby activating those cells to produce a variety of cytokines.[13] CD38 activation cooperates with TRPM2 channels to initiate physiological responses such as cell volume regulation.[14]

CD38 is a multifunctional

nicotinic acid is present under acidic conditions, CD38 can hydrolyze nicotinamide adenine dinucleotide phosphate (NADP+) to NAADP.[15][18]

These reaction products are essential for the regulation of intracellular Ca2+.[19] CD38 occurs not only as an ectoenzyme on cell outer surfaces, but also occurs on the inner surface of cell membranes, facing the cytosol performing the same enzymatic functions.[20]

CD38 is believed to control or influence neurotransmitter release in the brain by producing cADPR.[21] CD38 within the brain enables release of the affiliative neuropeptide oxytocin.[22]

Like CD38, CD157 is a member of the ADP-ribosyl cyclase family of enzymes that catalyze the formation of cADPR from NAD+, although CD157 is a much weaker catalyst than CD38.[23] The SARM1 enzyme also catalyzes the formation of cADPR from NAD+,[20] but SARM1 elevates cADPR much more efficiently than CD38.[24]

Clinical significance

The loss of CD38 function is associated with impaired immune responses, metabolic disturbances, and behavioral modifications including social amnesia possibly related to autism.[19][25]

leukocytes attaching to CD16 on endothelial cells allows for leukocyte binding to blood vessel walls, and the passage of leukocytes through blood vessel walls.[9]

The cytokine

Gram negative bacterial cell wall component lipopolysaccharide induce CD38 expression on macrophages.[27] Interferon gamma strongly induces CD38 expression on monocytes.[19] The cytokine tumor necrosis factor strongly induces CD38 on airway smooth muscle cells inducing cADPR-mediated Ca2+, thereby increasing dysfunctional contractility resulting in asthma.[28]

The CD38 protein is a marker of cell activation. It has been connected to

type II diabetes mellitus
and bone metabolism, as well as some genetically determined conditions.

CD38 increases airway contractility hyperresponsiveness, is increased in the lungs of asthmatic patients, and amplifies the inflammatory response of airway smooth muscle of those patients.[16]

Clinical application

CD38 inhibitors may be used as therapeutics for the treatment of asthma.[30]

CD38 has been used as a prognostic marker in leukemia.[31]

Daratumumab (Darzalex) which targets CD38 has been used in treating multiple myeloma.[32][33]

The use of Daratumumab can interfere with pre-

erythrocytes with dithiothreitol
(DTT) or by using an anti-CD38 antibody neutralizing agent, e.g. DaraEx.

Inhibitors

Aging studies

A gradual increase in CD38 has been implicated in the decline of

NAD+ with age.[49][50] Treatment of old mice with a specific CD38 inhibitor, 78c, prevents age-related NAD+ decline.[51] CD38 knockout mice have twice the levels of NAD+ and are resistant to age-associated NAD+ decline,[52] with dramatically increased NAD+ levels in major organs (liver, muscle, brain, and heart).[53] On the other hand, mice overexpressing CD38 exhibit reduced NAD+ and mitochondrial dysfunction.[52]

visceral fat and other tissues with age, leading to chronic inflammation.[55] The inflammatory transcription factor NF-κB and CD38 are mutually activating.[54] Secretions from senescent cells induce high levels of expression of CD38 on macrophages, which becomes the major cause of NAD+ depletion with age.[56]

Decline of NAD+ in the brain with age may be due to increased CD38 on

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000004468Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000029084Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. S2CID 44430455
    .
  6. ^ "Entrez Gene: CD38 CD38 molecule".
  7. S2CID 29082806
    .
  8. .
  9. ^ .
  10. ^ .
  11. .
  12. .
  13. ^ .
  14. .
  15. ^ .
  16. ^ .
  17. .
  18. .
  19. ^ .
  20. ^ .
  21. ^ .
  22. .
  23. .
  24. .
  25. .
  26. .
  27. ^ .
  28. .
  29. .
  30. .
  31. .
  32. .
  33. .
  34. .
  35. .
  36. .
  37. .
  38. .
  39. .
  40. .
  41. .
  42. ^ "Sarclisa EPAR". European Medicines Agency (EMA). 29 July 2021. Retrieved 29 July 2021.
  43. S2CID 212718499
    .
  44. .
  45. .
  46. .
  47. .
  48. .
  49. .
  50. .
  51. .
  52. ^ .
  53. .
  54. ^ .
  55. .
  56. .

Further reading

External links

This page is based on the copyrighted Wikipedia article: CD38. Articles is available under the CC BY-SA 3.0 license; additional terms may apply.Privacy Policy