Scientific Research
Preformulation study on first-line anti-HBV drug entecavir
Jiang Rui, Wang Tengteng, Tang Shengnan, Zhang Yiwen, Zhang Peng, Zhang Chunyan
Published 2020-08-01
Cite as IMHGN, 2020, 26(15): 2172-2178. DOI: 10.3760/cma.j.issn.1007-1245.2020.15.004
Abstract
ObjectiveTo perform a preformulation study for entecavir, a first-line anti-HBV drug with low drug resistance and strong antiviral effect, so as to provide theoretical basis for the development of entecavir sustained-release microspheres.
MethodsThe appearance, crystal form, and solubility of entecavir were investigated. A high performance liquid chromatography (HPLC) method for the quantitative determination of entecavir was established. The solubility of entecavir in different organic solvents and different phosphate buffers were determined, and the apparent oil-water partition coefficients at different pH conditions were measured.
ResultsEntecavir was a white crystalline powder, odorless and tasteless. It is highly soluble in dimethyl sulfoxide, soluble in methanol, and difficult to soluble in some organic solvents such as acetonitrile, acetone, dichloromethane, and ethyl acetate. The quantitative HPLC method for the entecavir determination showed a good linearity in the range of 5-100 μg/ml (R=0.999 9). The oil-water partition coefficient increased with the increase of pH value.
ConclusionsThe determination method of entecavir by HPLC established in this study is accurate and reliable. The present results indicate that entecavir is slightly soluble in water and insoluble in some organic solvents. The new entecavir preparations should be developed by suitable methods.
Key words:
Entecavir; Microspheres; Preformulation research; Solubility
Contributor Information
Jiang Rui
School of Pharmacy, Jining Medical University, Rizhao 276826, China
Wang Tengteng
School of Pharmacy, Yantai University, Yantai 264005, China
The State Key Laboratory of Long-acting and Targeting Drug Delivery System, Luye Pharma Group, Yantai 264005, China
Tang Shengnan
School of Pharmacy, Yantai University, Yantai 264005, China
The State Key Laboratory of Long-acting and Targeting Drug Delivery System, Luye Pharma Group, Yantai 264005, China
Zhang Yiwen
School of Pharmacy, Jining Medical University, Rizhao 276826, China
Zhang Peng
School of Pharmacy, Jining Medical University, Rizhao 276826, China
Zhang Chunyan
School of Pharmacy, Jining Medical University, Rizhao 276826, China