LFM-A13

Catalog No.S7734 Batch:S773401

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Technical Data

Formula
C11H8Br2N2O2
 
Molecular Weight 360 CAS No. 244240-24-2
Solubility (25°C)* In vitro DMSO 72 mg/mL (200.0 mM)
Water Insoluble
Ethanol Insoluble
In vivo (Add solvents to the product individually and in order)
Homogeneous suspension
CMC-NA
≥5mg/ml Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution
5%DMSO 40%PEG300 5%Tween80 50%ddH2O

Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.

 3.6mg/ml (10.00mM) Taking the 1 mL working solution as an example, add 50 μL of 72 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results. 
Clear solution
5% DMSO 95% Corn oil

Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.

 0.51mg/ml (1.42mM) Taking the 1 mL working solution as an example, add 50 μL of 10.2 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results. 
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description LFM-A13 is a specific Bruton's tyrosine kinase (BTK) inhibitor with IC50 of 2.5 μM, >100-fold selectivity over other protein kinases including JAK1, JAK2, HCK, EGFR,and IRK.
Targets
BTK [1]
(cell-free assay)
1.4 μM(Ki)
In vitro

In BCL-1 cells, NALM-6 cells, or normal BALB/c splenocytes, LFM-A13 inhibits the enzymatic activity of BTK in BCL-1 cells without affecting the BTK protein expression levels In human neutrophils, this compound decreases the tyrosine phosphorylation induced by fMet-Leu-Phe and inhibits the production of superoxide anions and the stimulation of adhesion, chemotaxis, and phospholipase D activity.

In vivo

In BALB/c mice bearing BCL-1 leukemia, combination of LFM-A13 (50 mg/kg/day i.p.) and the standard triple-drug VPL prolongs the median survival time. In primary myeloma-bearing SCID-rab mice, this compound inhibits osteoclast activity, prevents myeloma-induced bone resorption and suppresss myeloma growth.

Protocol (from reference)

Animal Study:

[4]
  • Animal Models

    BALB/c mice bearing BCL-1 leukemia

  • Dosages

    50 mg/kg/day, twice daily

  • Administration

    i.p.

References

  • https://pubmed.ncbi.nlm.nih.gov/10092645/
  • https://pubmed.ncbi.nlm.nih.gov/12006542/
  • https://pubmed.ncbi.nlm.nih.gov/12734372/
  • https://pubmed.ncbi.nlm.nih.gov/23456977/

Customer Product Validation

Cell-free kinase assay of IFN-gR2 phosphorylation at Y289 by constitutively active BTK with or without BTK inhibitor LFM-A13 (100 mM). WCL, whole-cell lysate; DIC, differential interference contrast microscopy.

Data from [ , , Cell, 2018, 175(5):1336-1351 ]

Crosslinking FcγRIIB triggers apoptosis through Btk and p38 MAPK in human B cells. a Purified naïve, memory B cells and PCs (105/ml) from seven donors were each treated with 10 μg/ml of ICs in the presence of either 2 μM of LFM-A13 or 10 nM of ibrutinib for 24 h. Apoptotic cells were determined by Annexin V staining (Biolegend) using flow cytometry. The asterisks indicate that the differences between the groups compared are statistically significant (P < 0.05).

Data from [ , , J Biomed Sci, 2015, 22:87. ]

Selleck's LFM-A13 Has Been Cited by 8 Publications

FcγRIIB mediates antigen-independent inhibition on human B lymphocytes through Btk and p38 MAPK [ Journal of Biomedical Science, October 16, 2015, 87]
Bruton tyrosine kinase deficiency augments NLRP3 inflammasome activation and causes IL-1β-mediated colitis [ Journal of Clinical Investigation, January 02, 2020, 1793-1807] PubMed: 31895698
Bruton's TK regulates myeloid cell recruitment during acute inflammation [ Br J Pharmacol, 2022, 179(11):2754-2770] PubMed: 34897650
CD81 knockout promotes chemosensitivity and disrupts in vivo homing and engraftment in acute lymphoblastic leukemia [ Blood Adv, 2020, 4(18):4393-4405] PubMed: 32926125
The cardenolides ouabain and reevesioside A promote FGF2 secretion and subsequent FGFR1 phosphorylation via converged ERK1/2 activation. [ Biochem Pharmacol, 2020, 172:113741] PubMed: 31812679
Mapping phospho-catalytic dependencies of therapy-resistant tumours reveals actionable vulnerabilities. [ Nat Cell Biol, 2019, 21(6):778-790] PubMed: 31160710
Phosphorylation-Mediated IFN-γR2 Membrane Translocation Is Required to Activate Macrophage Innate Response [Xu X, et al. Cell, 2018, 175(5):1336-1351] PubMed: 30318148
FcγRIIB mediates antigen-independent inhibition on human B lymphocytes through Btk and p38 MAPK [Tzeng SJ, et al. J Biomed Sci, 2015, 10.1186/s12929-015-0200-9] PubMed: 26475492

RETURN POLICY
Selleck Chemical’s Unconditional Return Policy ensures a smooth online shopping experience for our customers. If you are in any way unsatisfied with your purchase, you may return any item(s) within 7 days of receiving it. In the event of product quality issues, either protocol related or product related problems, you may return any item(s) within 365 days from the original purchase date. Please follow the instructions below when returning products.

SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.