Recombinant Human TSLP Protein (His Tag)

Beta LifeScience SKU/CAT #: BLPSN-4690

Recombinant Human TSLP Protein (His Tag)

Beta LifeScience SKU/CAT #: BLPSN-4690
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Product Overview

Tag His
Host Species Human
Accession NP_149024.1
Background Thymic stromal lymphopoietin (TSLP) is an interleukin 7 (IL-7)-like cytokine originally characterized by its ability to promote the activation of B cells and dendritic cells (DCs). Thymic stromal lymphopoietin (TSLP) is a cytokine expressed by epithelial cells, including keratinocytes, and is important in allergic inflammation. Subsequent studies have shown that TSLP promotes T helper type 2 (TH2) cell responses associated with immunity to some helminth parasites and the pathogenesis of many inflammatory diseases, including atopic dermatitis and asthma. TSLP can promote TH2 cytokine-associated inflammation by directly promoting the effector functions of CD4+ TH2 cells, basophils and other granulocyte populations while simultaneously limiting the expression of DC-derived proinflammatory cytokines and promoting regulatory T cell responses in peripheral tissues.
Description A DNA sequence encoding the human TSLP (NP_149024.1) (Met1-Gln159, with mutation Arg 127 Ala, Arg 130 Ser) was expressed with a His tag at the C-terminus.
Source HEK293
Predicted N Terminal Met 1
AA Sequence Met1-Gln159, with mutation Arg 127 Ala, Arg 130 Ser
Molecular Weight The recombinant human TSLP consists of 142 a.a. and predicts a molecular mass of 16.2 kDa.
Purity >95% as determined by SDS-PAGE.
Endotoxin < 1.0 EU per μg protein as determined by the LAL method.
Bioactivity Please contact us for detailed information
Formulation Lyophilized from sterile PBS, pH 7.4.
Stability The recombinant proteins are stable for up to 1 year from date of receipt at -70°C.
Usage For Research Use Only
Storage Store the protein under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.

Target Details

Target Function Cytokine that induces the release of T-cell-attracting chemokines from monocytes and, in particular, enhances the maturation of CD11c(+) dendritic cells. Can induce allergic inflammation by directly activating mast cells.; May act as an antimicrobial peptide in the oral cavity and on the skin.
Subcellular Location Secreted.
Database References
Tissue Specificity Isoform 1 is expressed in a number of tissues including heart, liver and prostate. Isoform 2 is the predominant form in keratinocytes of oral mucosa, skin and in salivary glands. It is secreted into saliva.

Gene Functions References

  1. TSLP receptor allosterically activates TSLP to potentiate the recruitment of the shared interleukin 7 receptor alpha-chain (IL-7Ralpha) by leveraging the flexibility, conformational heterogeneity and electrostatics of the cytokine. PMID: 28368013
  2. Effects of Linalyl Acetate on Thymic Stromal Lymphopoietin Production in Mast Cells. PMID: 30011850
  3. presence of epithelium-derived TSLP in the eustachian tubes plays important role in the onset of eosinophilic otitis media PMID: 29272985
  4. a new mechanism of T cell stimulation in human skin was identified, demonstrating the direct induction of T cell migration by TSLP in the absence of DCs. PMID: 28377574
  5. the secretion of TSLP by keratinocytes is induced by the HIV-1 viral synapse in a miR-375 controlled manner PMID: 28443609
  6. production increased at skin sites of ovalbumin sensitization PMID: 27992078
  7. Sera of patients with infantile eosinophilic gastroenteritis showed a specific increase in both thymic stromal lymphopoietin and IL-33 levels. PMID: 26948075
  8. short and long thymic stromal lymphopoietin isoforms have roles in house dust mite-induced asthmatic airway epithelial barrier disruption PMID: 27996052
  9. DeltaNp73 was abundantly expressed in the atopic dermatitis epidermis and increased the release of TSLP via NF-kappaB activation. PMID: 28655470
  10. this study shows that long form of thymic stromal lymphopoietin of keratinocytes is induced by protein allergens PMID: 28720058
  11. we found that activation of the protease-activated receptor 1 (PAR1) induced secretion of TSLP by the corneal stromal cells... we proposed that TSLP might function as the link between increased protease activity and inflammatory responses or itch sensation in the corneas PMID: 28631887
  12. TSLP-HOTAIR axis also plays a protective role in low-density lipoprotein (ox-LDL)-induced Endothelial cells' injury. PMID: 28615347
  13. The aim of this study was to determine the influence of human rhinovirus on the genes involved in airway remodeling and to examine the impact of TSLP and contribution of oxidative stress on airway remodeling in the context of HRV infection. PMID: 28545810
  14. TSLP-induced phosphorylation of l-plastin is increased in atopic dermatitis and increases eosinophil migration. PMID: 27304220
  15. a hit expansion exercise yielded additional active compounds that could be amenable to further optimization, providing an opportunity to dissociate TSLP inhibition from other non-desired activities. This study illustrates the potential of phenotypic drug discovery to complement target based approaches by providing new chemistry and biology leads PMID: 29320511
  16. study found that among patients with atopic dermatitis (AD), common FLG null mutations are associated with earlier AD onset in a dose-dependent manner, whereas TSLP rs1898671 appears unrelated to the timing of AD onset PMID: 28479194
  17. lactobacilli from the omnivorous group and all bifidobacteria significantly down-regulated IL-8. Notably, both genera also lowered the TSLP expression in stimulated Caco-2 cells, regardless of the diet regimen. PMID: 27863334
  18. this review focuses on recent advances on the effects of TSLP on obstetrical and gynecological diseases, including pregnancy failure, endometriosis, and cervical cancer PMID: 27976427
  19. The increase in TSLP and TNF-alpha level observed in IS fluid was found to correlate with disease severity. The increased TSLP production from asthma sputum cells was abrogated by the addition of rIL-37. Regulation of TSLP pathway may be a therapeutic approach for asthma. PMID: 27528425
  20. House dust mite sublingual immunotherapy downregulated Th2-type immune responses mediated by the TSLP-OX40L signaling pathway in patients with persistent moderate to severe allergic rhinitis. PMID: 27012942
  21. The results suggest that IL-1beta may be an early key mediator for the acquisition of an Atopic dermatitis (AD) phenotype through induction of thymic stromal lymphopoietin (TSLP) and alteration of the epidermal homeostasis. PMID: 28191908
  22. House dust mite exposure increases the expression of TSLP through PI3K/Akt signaling pathway in human bronchial epithelial 16HBE cells. PMID: 28400057
  23. Posttranslational modifications control the functional activity of TSLP in humans and overproduction of TSLP may be a key trigger for the amplification of type 2 inflammation in diseases PMID: 27744031
  24. Study provides evidence for the hypothesis that TSLP could reflect the histological severity of lumbar disc degeneration (LDD), and TSLP-siRNA and TSLPR-siRNA could inhibit apoptosis of nucleus pulposus cells. The evident information obtained from the investigation could lead the way for new therapeutic approaches regarding LDD treatment. PMID: 28746197
  25. periostin-mediated TSLP production by keratinocytes directly stimulates cutaneous T-cell lymphoma (CTCL) tumor cell growth in addition to inducing a Th2-dominant tumor environment in CTCL. PMID: 27634769
  26. this study shows that TSLP may be involved in the pathogenesis of asthma and rhinitis; dust mite and mugwort allergy could increase it significantly PMID: 28303765
  27. Serum TSLP levels were significantly increased in systemic sclerosis patients compared to healthy donors, and were associated with a higher frequency of vasculopathy. The proportion of TSLP-positive dermal cells was increased in the skin of SSc patients compared with healthy donors, and was correlated with fibrosis. PMID: 27429171
  28. this study shows that NOD2 is an asthma-related factor that can promote cell proliferation and inflammatory response by mediated expression of TSLP in human airway smooth muscle cells PMID: 27889082
  29. the effects of TSLP on myeloid cells are crucial in reducing the multiple organ failure that is associated with systemic inflammation. PMID: 26934097
  30. interactions between TSLP in follicular dendritic cells and IgA production in tonsils may be an important mechanism contributing to the pathogenesis of Immunoglobulin A (IgA) nephropathy. PMID: 27187742
  31. Study demonstrated that naturally occurring severe infections by the most common respiratory viruses in hospitalized infants induce nasal airway secretion of TSLP, IL-33, and periostin when compared with healthy controls PMID: 28471975
  32. Variations in FLG and TSLP genotype were associated with differences in self-reported skin clearance, TCI usage, and steroid usage. PMID: 27902816
  33. A possible role of TSLP in immune homeostasis in HIV infection:higher plasma TSLP was found in individuals with primary HIV infection compared to both chronic HIV infection and healthy controls. PMID: 27769179
  34. The polymorphism was further reproducibly associated with a DNA methylation signature in whole blood (P = 4.5x10-40) that also associated with allergic sensitization and expression in blood of the cytokine TSLP (P = 1.1x10-4). Knockdown of the transcription factor predicted to bind the enhancer region (NHLH1) in a human cell line (HEK293) expressing NHLH1 resulted in lower TSLP expression PMID: 27149122
  35. TSLP level was significantly higher in asthmatic than in nonasthmatic children. TSLP level was significantly different between allergic asthmatic and nonallergic nonasthmatic groups. PMID: 26999524
  36. While serum TSLP levels were unaffected by concomitant allergies and atopic comorbidities, serum levels of IL-31, IL-33 and sST2 were affected to a small extent. We found a positive correlation between TSLP, IL-31 and IL-33, and an inverse relationship between IL-33 and sST2 PMID: 27152943
  37. Results showed that TSLP promoted the production of alpha-SMA and collagen I (P<0.001), suggesting that it can accelerate MRC-5 cell fibrosis. PMID: 27385084
  38. TSLP is a key mediator in the pathogenesis of inflammatory bowel diseases and that further studies are needed to evaluate its role. [review] PMID: 27697608
  39. Letter: report decreased salivary gland TSLP expression in primary Sjogren's syndrome. PMID: 27494755
  40. A novel mouse xenograft model to study the role of TSLP-induced CRLF2 signals in normal and malignant human B lymphopoiesis has been developed. PMID: 26611474
  41. Heat stress-induced HSPs can significantly reduce the production and secretion of TSLP from keratinocytes cultured under Th2 environment. PMID: 26419317
  42. TSLP expression in the skin is mediated via RARgamma-RXR pathways. PMID: 26531761
  43. Epidermal thymic stromal lymphopoietin predicts the development of atopic dermatitis during infancy. PMID: 26879860
  44. study shows that specific food antigens can trigger innate immune mediated esophageal TSLP secretion PMID: 26992000
  45. production by monocyte-derived dendritic cells requires the integration of signals from dectin-1, the IL-1 receptor, and endoplasmic reticulum stress response stress signaling pathways PMID: 26573878
  46. The association of TSLP polymorphism rs2289278 with atopic dermatitis (AD) was stronger in children with allergic sensitization than in children without atopy, and TSLP polymorphisms also increased the risk of asthma in children with AD PMID: 26712523
  47. The positive feedback loop between TSLP, IL-33 and their receptors, and Th2 cytokines may facilitate Th2-skewed inflammation in eosinophilic CRSwNP. PMID: 26095319
  48. results show that rs1837253 polymorphism may be directly involved in the regulation of TSLP secretion. PMID: 25515628
  49. Upon TSLP stimulation, the cells with the highest TSLPR expression level showed enhanced proliferation and JAK/STAT-mediated gene regulation in a dose-dependent manner PMID: 26652578
  50. Thymic stromal lymphopoietin activation of basophils in patients with allergic asthma is IL-3 dependent PMID: 25962901


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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

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