Thymic stromal lymphopoietin

Last updated
TSLP
Available structures
PDB Ortholog search: PDBe RCSB
Identifiers
Aliases TSLP , thymic stromal lymphopoietin
External IDs OMIM: 607003 MGI: 1855696 HomoloGene: 81957 GeneCards: TSLP
Orthologs
SpeciesHumanMouse
Entrez

85480

53603

Ensembl

ENSG00000145777

ENSMUSG00000024379

UniProt

Q969D9

Q9JIE6

RefSeq (mRNA)

NM_033035
NM_138551

NM_021367

RefSeq (protein)

NP_149024
NP_612561

NP_067342

Location (UCSC) Chr 5: 111.07 – 111.08 Mb Chr 18: 32.95 – 32.95 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Thymic stromal lymphopoietin (TSLP) is a protein belonging to the cytokine family. It is known to play an important role in the maturation of T cell populations through activation of antigen-presenting cells.

Contents

TSLP is produced mainly by non-hematopoietic cells such as fibroblasts, epithelial cells and different types of stromal or stromal-like cells.[ citation needed ]

Gene ontology

TSLP production has been observed in various species, including humans and mice. In humans TSLP is encoded by the TSLP gene. [5] [6] Alternative splicing of this gene results in two transcript variants. [6]

Function

It mainly impacts myeloid cells and induces the release of T cell-attracting chemokines from monocytes [ citation needed ] and enhances the maturation of myeloid (CD11c+) dendritic cells. [7] TSLP has also been shown to activate the maturation of a specific subset of dendritic cells located within the epidermis, called Langerhans cells. [8] Within the thymus TSLP activation of both myeloid and plasmacytoid (CD123+) dendritic cells results in the production of regulatory T cells. [9] [10]

Signaling

Crystal structure of human TSLP in complex with TSLP-R and IL-7Ra (pdb 5j11) TSLP wiki 5j11.png
Crystal structure of human TSLP in complex with TSLP-R and IL-7Ra (pdb 5j11)

TSLP signals through a heterodimeric receptor complex composed of the thymic stromal lymphopoietin receptor CRLF2 (also known as TSLP receptor, TSLP-R) and the IL-7R alpha chain. [12] After binding STAT5 phosphorylation is induced, resulting in the expression of downstream transcription factors. [13]

Disease

TSLP expression is linked to many disease states including asthma, [14] inflammatory arthritis, [15] atopic dermatitis, [8] eczema, eosinophilic esophagitis and other allergic states. [16] [17] The factors inducing the activation of TSLP release are not clearly defined.

Asthma

Expression of TSLP is enhanced under asthma-like conditions (aka Airway HyperResponsiveness or AHR model in the mouse), conditioning APCs in order to orient the differentiation of T cells coming into the lungs towards a TH2 profile (T helper 2 pathway).[ citation needed ] The TH2 cells then release factors promoting an inflammatory reaction following the repeated contact with a specific antigen in the airways.[ citation needed ]

Inflammatory arthritis

Atopic dermatitis

TSLP-activated Langerhans cells of the epidermis induce the production of pro-inflammatory cytokines like TNF-alpha by T cells potentially causing atopic dermatitis. [8] It is thought that by understanding the mechanism of TSLP production and those potential substances that block the production, one may be able to prevent or treat conditions of asthma and/or eczema. [18]

Inhibition

The TSLP signaling axis is an attractive therapeutic target. Amgen's Tezepelumab, a monoclonal antibody which blocks TSLP, is currently approved for the treatment of severe asthma. [19] [20] Fusion proteins consisting of TSLPR and IL-7Rα which can trap TSLP with excellent affinity have also been designed. [21] Additional approaches towards TSLP/TSLPR inhibition include peptides derived from the TSLP:TSLPR interface, [22] natural products [23] and computational fragment-based screening. [24]

Related Research Articles

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References

  1. 1 2 3 GRCh38: Ensembl release 89: ENSG00000145777 - Ensembl, May 2017
  2. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000024379 - Ensembl, 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. ↑ Quentmeier H, Drexler HG, Fleckenstein D, Zaborski M, Armstrong A, Sims JE, Lyman SD (August 2001). "Cloning of human thymic stromal lymphopoietin (TSLP) and signaling mechanisms leading to proliferation". Leukemia. 15 (8): 1286–92. doi:10.1038/sj.leu.2402175. PMID   11480573.
  6. 1 2 "Entrez Gene: TSLP thymic stromal lymphopoietin".
  7. ↑ Reche PA, Soumelis V, Gorman DM, Clifford T, Travis M, Zurawski SM, et al. (July 2001). "Human thymic stromal lymphopoietin preferentially stimulates myeloid cells". Journal of Immunology. 167 (1): 336–43. doi: 10.4049/jimmunol.167.1.336 . PMID   11418668.
  8. 1 2 3 Ebner S, Nguyen VA, Forstner M, Wang YH, Wolfram D, Liu YJ, Romani N (April 2007). "Thymic stromal lymphopoietin converts human epidermal Langerhans cells into antigen-presenting cells that induce proallergic T cells". The Journal of Allergy and Clinical Immunology. 119 (4): 982–90. doi:10.1016/j.jaci.2007.01.003. PMID   17320941.
  9. ↑ Watanabe N, Wang YH, Lee HK, Ito T, Wang YH, Cao W, Liu YJ (August 2005). "Hassall's corpuscles instruct dendritic cells to induce CD4+CD25+ regulatory T cells in human thymus". Nature. 436 (7054): 1181–5. Bibcode:2005Natur.436.1181W. doi:10.1038/nature03886. PMID   16121185. S2CID   4387582.
  10. ↑ Hanabuchi S, Ito T, Park WR, Watanabe N, Shaw JL, Roman E, et al. (March 2010). "Thymic stromal lymphopoietin-activated plasmacytoid dendritic cells induce the generation of FOXP3+ regulatory T cells in human thymus". Journal of Immunology. 184 (6): 2999–3007. doi:10.4049/jimmunol.0804106. PMC   3325785 . PMID   20173030.
  11. ↑ Verstraete, K.; Savvides, S.N. (2017-04-05). "Structure of human TSLP in complex with TSLPR and IL-7Ralpha". Worldwide Protein Data Bank. doi:10.2210/pdb5j11/pdb.
  12. ↑ Verstraete, K.; Savvides, S.N. (2017-04-05). "Structure of human TSLP in complex with TSLPR and IL-7Ralpha". Worldwide Protein Data Bank. doi:10.2210/pdb5j11/pdb.
  13. ↑ Isaksen DE, Baumann H, Trobridge PA, Farr AG, Levin SD, Ziegler SF (December 1999). "Requirement for stat5 in thymic stromal lymphopoietin-mediated signal transduction". Journal of Immunology. 163 (11): 5971–7. doi: 10.4049/jimmunol.163.11.5971 . PMID   10570284. S2CID   7211559.
  14. ↑ Ying S, O'Connor B, Ratoff J, Meng Q, Mallett K, Cousins D, et al. (June 2005). "Thymic stromal lymphopoietin expression is increased in asthmatic airways and correlates with expression of Th2-attracting chemokines and disease severity". Journal of Immunology. 174 (12): 8183–90. doi: 10.4049/jimmunol.174.12.8183 . PMID   15944327.
  15. ↑ Koyama K, Ozawa T, Hatsushika K, Ando T, Takano S, Wako M, et al. (May 2007). "A possible role for TSLP in inflammatory arthritis". Biochemical and Biophysical Research Communications. 357 (1): 99–104. doi:10.1016/j.bbrc.2007.03.081. PMID   17416344.
  16. ↑ Soumelis V, Liu YJ (February 2004). "Human thymic stromal lymphopoietin: a novel epithelial cell-derived cytokine and a potential key player in the induction of allergic inflammation". Springer Seminars in Immunopathology. 25 (3–4): 325–33. doi:10.1007/s00281-003-0152-0. PMID   14999427. S2CID   9713181.
  17. ↑ Soumelis V, Reche PA, Kanzler H, Yuan W, Edward G, Homey B, et al. (July 2002). "Human epithelial cells trigger dendritic cell mediated allergic inflammation by producing TSLP" (PDF). Nature Immunology. 3 (7): 673–80. doi:10.1038/ni805. PMID   12055625. S2CID   9648786.
  18. ↑ Demehri S, Morimoto M, Holtzman MJ, Kopan R (May 2009). "Skin-derived TSLP triggers progression from epidermal-barrier defects to asthma". PLOS Biology. 7 (5): e1000067. doi:10.1371/journal.pbio.1000067. PMC   2700555 . PMID   19557146.
  19. ↑ "Tezspire- tezepelumab-ekko injection, solution". DailyMed. Retrieved 24 December 2021.
  20. ↑ "Tezspire (tezepelumab) approved in the US for severe asthma". AstraZeneca (Press release). 17 December 2021. Retrieved 17 December 2021.
  21. ↑ Verstraete K, Peelman F, Braun H, Lopez J, Van Rompaey D, Dansercoer A, et al. (April 2017). "Structure and antagonism of the receptor complex mediated by human TSLP in allergy and asthma". Nature Communications. 8: 14937. Bibcode:2017NatCo...814937V. doi:10.1038/ncomms14937. PMC   5382266 . PMID   28368013.
  22. ↑ Park S, Park Y, Son SH, Lee K, Jung YW, Lee KY, et al. (October 2017). "Synthesis and biological evaluation of peptide-derived TSLP inhibitors". Bioorganic & Medicinal Chemistry Letters. 27 (20): 4710–4713. doi:10.1016/j.bmcl.2017.09.010. PMID   28927768.
  23. ↑ Park BB, Choi JW, Park D, Choi D, Paek J, Kim HJ, et al. (June 2019). "Structure-Activity Relationships of Baicalein and its Analogs as Novel TSLP Inhibitors". Scientific Reports. 9 (1): 8762. Bibcode:2019NatSR...9.8762P. doi:10.1038/s41598-019-44853-5. PMC   6584507 . PMID   31217492.
  24. ↑ Van Rompaey D, Verstraete K, Peelman F, Savvides SN, Augustyns K, Van Der Veken P, De Winter H (December 2017). "Virtual screening for inhibitors of the human TSLP:TSLPR interaction". Scientific Reports. 7 (1): 17211. Bibcode:2017NatSR...717211V. doi:10.1038/s41598-017-17620-7. PMC   5722893 . PMID   29222519.

Further reading

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