Baricitinib (LY3009104, INCB028050)
Molecular Weight(MW): 371.42
Baricitinib (LY3009104, INCB028050) is a selective JAK1 and JAK2 inhibitor with IC50 of 5.9 nM and 5.7 nM in cell-free assays, ~70 and ~10-fold selective versus JAK3 and Tyk2, no inhibition to c-Met and Chk2. Phase 3.
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bDNA analysis showing that the JAK1/2 inhibitors CYT387, AZD1480 and Baricitinib positively regulate UCP1 expression in PSC-WA. Values are mean ± s.d. of n = three biological replicates and differences from DMSO are significant for * P < 0.005. P values were calculated using the two-tailed paired Student's t-test.
Nat Cell Biol,2014, 17(1):57-67. Baricitinib (LY3009104, INCB028050) purchased from Selleck.
(A-C) Anti-proliferative activity of NDI-031301 (A), tofacitinib (B) or baricitinib (C) on transformed Ba/F3 cells. Ba/F3 cells transformed by TEL-ABL, TEL-JAK1, TEL-JAK2, TEL-JAK3, or TEL-TYK2 were cultured with graded concentrations of the indicated inhibitor for 72 h. Cell viability values are mean SD percentages of the untreated control value in triplicate experiments.
Br J Haematol, 2017, 177(2):271-282. Baricitinib (LY3009104, INCB028050) purchased from Selleck.
Purity & Quality Control
Choose Selective JAK Inhibitors
|Description||Baricitinib (LY3009104, INCB028050) is a selective JAK1 and JAK2 inhibitor with IC50 of 5.9 nM and 5.7 nM in cell-free assays, ~70 and ~10-fold selective versus JAK3 and Tyk2, no inhibition to c-Met and Chk2. Phase 3.|
Baricitinib inhibits IL-6–stimulated phosphorylation of the canonical substrate STAT3 (pSTAT3) and subsequent production of the chemokine MCP-1 with IC50 values of 44 nM and 40 nM, respectively, in PBMCs. Baricitinib also inhibits pSTAT3 stimulated by IL-23 with IC50 od 20 nM in isolated naive T-cells. 
|In vivo||Baricitinib inhibits IL-6–stimulated phosphorylation of STAT3 in whole blood with an IC50 of 128 nM. Baricitinib (10 mg/kg p.o.) is expected to inhibit JAK1/2 signaling (by ≥50%) in rats for about 8 hours. Baricitinib (10 mg/mL, p.o.) inhibits disease scores in dose-dependent manner in rats with established disease in the adjuvant arthritis model. Baricitinib treatment, compared with vehicle, inhibits the increase in hind paw volumes during the 2 weeks of treatment by 50% at a dose of 1 mg/kg and >95% at doses of 3 mg/kg or 10 mg/kg. Baricitinib treatment, compared with vehicle, also inhibits composite score of immune infiltrate, edema, and periarticular tissue appearance by 27% at a dose of 1 mg/kg, 64% at doses of 3 mg/kg and 82% at doses of 10 mg/kg in rats with established disease in the adjuvant arthritis model. Baricitinib reduces bone resorption by 15%, 61%, and 67% with increasing dose level (1, 3, and 10 mg/kg) in rats with established disease in the adjuvant arthritis model. Baricitinib (10 mg/kg, daily for 2 wk, p.o.) results in radiographic improvements with restoration of the normal architecture and appearance to the ankle and tarsals in rats with established disease in the adjuvant arthritis model. Baricitinib reduces levels of pSTAT3 in a dose- and time-dependent manner in the peripheral blood of rAIA animals. Baricitinib (10 mg/mL, p.o.) improves a composite score of joint damage by 47% in the murine CIA model. Baricitinib (10 mg/kg) reduces pannus (74%) and bone damage (78%) and improves cartilage damage (43%) and signs of inflammation (33%), resulting in a 53% improvement in an aggregate score of disease in the collagen Ab-induced arthritis (CAIA) murine model. Baricitinib (10 mg/kg) inhibits the delayed-type hypersensitivity response by 48% in both the CIA and CAIA models.  Baricitinib is efficacious in active rheumatoid arthritis patients refractory to disease modifying drugs and biologics.  Baricitinib preferentially inhibits JAK1 and JAK2, with 10-fold selectivity over Tyk2 and 100-fold over JAK3. The observed effects of GLPG-0634 on the ACR20, albeit in a smaller study, appear to be at least as good as that seen with tofacitinib and superior to that of baricitinib, since baricitinib only moderately affect the ACR20 values in Phase IIa clinical studies.  Baricitinib has the dose-limiting side-effect of inducing anaemia which has been attributed to its effects on JAK2 but has clearly shown efficacy. |
|In vitro||DMSO||74 mg/mL (199.23 mM)|
|In vivo||Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
2% DMSO+30% PEG 300+5% Tween 80+ddH2O
For best results, use promptly after mixing.
* 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.
Calculate the mass, volume or concentration required for a solution. The Selleck molarity calculator is based on the following equation:
Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)
*When preparing stock solutions, please always use the batch-specific molecular weight of the product found on the via label and MSDS / COA (available on product pages).
Calculate the dilution required to prepare a stock solution. The Selleck dilution calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )
* When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and MSDS / COA (available online).
Molecular Weight Calculator
Enter the chemical formula of a compound to calculate its molar mass and elemental composition:
Tip: Chemical formula is case sensitive. C10H16N2O2 c10h16n2o2
Instructions to calculate molar mass (molecular weight) of a chemical compound:
To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
Clinical Trial Information
|NCT Number||Recruitment||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT03026504||Recruiting||Arteritis Giant Cell||Matthew J Koster|Eli Lilly and Company|Mayo Clinic||March 9 2017||Phase 2|
|NCT03334435||Recruiting||Atopic Dermatitis||Eli Lilly and Company|Incyte Corporation||March 28 2018||Phase 3|
|NCT03559270||Enrolling by invitation||Atopic Dermatitis||Eli Lilly and Company|Incyte Corporation||June 27 2018||Phase 3|
|NCT03334422||Active not recruiting||Atopic Dermatitis||Eli Lilly and Company|Incyte Corporation||November 27 2017||Phase 3|
|NCT03212638||Completed||Healthy||Eli Lilly and Company||June 27 2017||Phase 1|
|NCT03570749||Recruiting||Alopecia Areata||Eli Lilly and Company|Incyte Corporation||September 24 2018||Phase 2|Phase 3|
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
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Frequently Asked Questions
Do you know if S2851 will dissolve directly into 0.5% methylcellulose (vehicle for oral gavage treatments) or is acid required to dissolve it?
S2851 dissolve directly into 0.5% methylcellulose, and this is cited from the reference. We also test that dissolve S2851 into 30% PEG400/0.5% Tween80/5% propylene glycol. The solubility is about 30 mg/mL.