Aloin B
Based on 3 publication(s) in Google Scholar
Aloin B (Isobarbaloin) is an orally active SARS-CoV-2 papain-like protease (PLpro) inhibitor with an IC50 of 16.08 μM (hydrolytic activity) and 17.51 μM (deubiquitinase activity). Aloin B is metabolized by rat intestinal flora into aloe-emodin-9-anthrone to exert laxative effects. Aloin B inhibits TPA (HY-18739)-induced ear edema, putrescine elevation, and tumor promotion in mouse skin. Aloin B can be used in research related to anti-inflammation, tumor promotion inhibition, coronavirus disease 2019 (COVID-19) and constipation.
For research use only. We do not sell to patients.
- Purity: 99.87%
- CAS No.: 28371-16-6
- Formula: C21H22O9
- Molecular Weight:418.39
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Storage:Powder -20°C, 3 years , 4°C, 2 years ; In solvent -80°C, 6 months , -20°C, 1 month
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Purity & Documentation
- References
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Help & FAQs
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Publications Citing Use of MedChemExpress (MCE) Aloin B
More
Biological Activity
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Cell Line
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Type | Value | Description | References |
|---|---|---|---|---|
| Vero C1008 | CC50 |
>100 μM
Compound: 43
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Cytotoxicity against African green monkey Vero E6 cells assessed as cell viability treated for 24 to 48 hrs by prestoblue staining based assay
Cytotoxicity against African green monkey Vero E6 cells assessed as cell viability treated for 24 to 48 hrs by prestoblue staining based assay
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[PMID: 35620927] |
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
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Animal Model:Wistar rats (male, 150-200 g, barbaloin-positive selected via pre-testing)[1]
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Dosage:31.1 mg/kg; 19.2 mg/kg (ED50 value)
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Administration:p.o.; single dose
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Result:Induced positive cathartic response (ranging from soft feces to liquid feces) in all barbaloin-positive rats at 31.1 mg/kg.
Achieved an ED50 of 19.2 mg/kg (95% confidence limit: 16.0-22.4 mg/kg) for producing cathartic effects in 50% of tested rats.
Decomposed to aloe-emodin-9-anthrone in the rat cecum at 6 hours after oral administration of 31.1 mg/kg.
Chemical Information
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CAS No. 28371-16-6
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Appearance Solid
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Molecular Weight 418.39
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Formula C21H22O9
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Color Light yellow to yellow
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SMILES
O[C@H]([C@H]1O)[C@](O[C@H](CO)[C@H]1O)([H])[C@@](C2=CC=CC(O)=C23)([H])C(C=C(CO)C=C4O)=C4C3=O
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Synonyms
Isobarbaloin
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Structure Classification
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Initial Source
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Publications (3)
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Journal Impact Factor
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Most Recent
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Sci Rep
Aloin isoforms (A and B) selectively inhibits proteolytic and deubiquitinating activity of papain like protease (PLpro) of SARS-CoV-2 in vitro. [Abstract]2022 Feb 9;12(1):2145. PMID: 35140265 -
Vet Microbiol
The Chinese medicine monomer Schisandrin C inhibits PRRSV infection by regulating the OGT-PI3K/AKT/mTOR signaling pathway. [Abstract]2026 May:316:110992. PMID: 41865607 -
Solvent & Solubility
DMSO : 50 mg/mL (119.51 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Select the appropriate dissolution method based on your experimental animal and administration route.
- For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
- To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for In Vivo experiments, it is recommended to prepare freshly and use it on the same day.
- The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 2.5 mg/mL (5.98 mM); Clear solution
This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: ≥ 2.5 mg/mL (5.98 mM); Clear solution
This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
Please enter the basic information of animal experiments:
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
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%DMSO +
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
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%+
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+%Tween-80 + +
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%Saline +
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Working solution concentration: 0.22 mg/mL
Method for preparing stock solution: mg drug dissolved in μL DMSO. Stock solution concentration: mg/mL.
1. Take μL DMSO stock solution;
2. Add μL .
μL , mix evenly;
3. Then add μL Tween 80, mix evenly;
4. Then add μL
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation
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Data Sheet (282 KB)
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SDS (392 KB)
- English - EN (392 KB)
- Français - FR (392 KB)
- Deutsch - DE (392 KB)
- Norwegian - NO (392 KB)
- Español - ES (392 KB)
- Swedish - SV (392 KB)
- Italian - IT (392 KB)
- Portuguese - PT (392 KB)
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Handling Instructions (2659 KB)
References
[1]. Ishii Y, et al. Studies of aloe. VI. Cathartic effect of isobarbaloin. Biol Pharm Bull. 1998;21(11):1226-1227. [Content Brief]
[2]. Shimpo K, et al. Aloe arborescens extract inhibits TPA-induced ear oedema, putrescine increase and tumour promotion in mouse skin. Phytother Res. 2002;16(5):491-493. [Content Brief]
[3]. Lewis DSM, et al. Aloin isoforms (A and B) selectively inhibits proteolytic and deubiquitinating activity of papain like protease (PLpro) of SARS-CoV-2 in vitro. Sci Rep. 2022;12(1):2145. Published 2022 Feb 9. [Content Brief]
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
|---|---|---|---|---|---|
| DMSO | 1 mM | 2.3901 mL | 11.9506 mL | 23.9011 mL | 59.7529 mL |
| 5 mM | 0.4780 mL | 2.3901 mL | 4.7802 mL | 11.9506 mL | |
| 10 mM | 0.2390 mL | 1.1951 mL | 2.3901 mL | 5.9753 mL | |
| 15 mM | 0.1593 mL | 0.7967 mL | 1.5934 mL | 3.9835 mL | |
| 20 mM | 0.1195 mL | 0.5975 mL | 1.1951 mL | 2.9876 mL | |
| 25 mM | 0.0956 mL | 0.4780 mL | 0.9560 mL | 2.3901 mL | |
| 30 mM | 0.0797 mL | 0.3984 mL | 0.7967 mL | 1.9918 mL | |
| 40 mM | 0.0598 mL | 0.2988 mL | 0.5975 mL | 1.4938 mL | |
| 50 mM | 0.0478 mL | 0.2390 mL | 0.4780 mL | 1.1951 mL | |
| 60 mM | 0.0398 mL | 0.1992 mL | 0.3984 mL | 0.9959 mL | |
| 80 mM | 0.0299 mL | 0.1494 mL | 0.2988 mL | 0.7469 mL | |
| 100 mM | 0.0239 mL | 0.1195 mL | 0.2390 mL | 0.5975 mL |
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