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Wang Y, Ding F, Wang T, Liu W, Lindquist S, Hernell O, Wang J, Li J, Li L, Zhao Y, Dai Y, Li N. Purification and characterization of recombinant human bile salt-stimulated lipase expressed in milk of transgenic cloned cows. PLoS One 2017; 12:e0176864. [PMID: 28475629 PMCID: PMC5419509 DOI: 10.1371/journal.pone.0176864] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 04/18/2017] [Indexed: 01/13/2023] Open
Abstract
Bile salt-stimulated lipase (BSSL) is a lipolytic digestive enzyme with broad substrate specificity secreted from exocrine pancreas into the intestinal lumen in all species and from the lactating mammary gland into the milk of some species, notably humans but not cows. BSSL in breast milk facilitates digestion and absorption of milk fat and promotes growth of small for gestational age preterm infants. Thus, purified recombinant human BSSL (rhBSSL) can be used for treatment of patients with fat malabsorption and expressing rhBSSL in the milk of transgenic cloned cows would therefore be a mean to meet a medical need. In the present study, a vector pBAC-hLF-hBSSL was constructed, which efficiently expressed active rhBSSL in milk of transgenic cloned cows to a concentration of 9.8 mg/ml. The rhBSSL purified from cow milk had the same enzymatic activity, N-terminal amino acid sequence, amino acid composition and isoelectric point and similar physicochemical characteristics as human native BSSL. Our study supports the use of transgenic cattle for the cost-competitive, large-scale production of therapeutic rhBSSL.
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Affiliation(s)
- Yuhang Wang
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P. R. China
| | - Fangrong Ding
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P. R. China
| | - Tao Wang
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P. R. China
| | - Wenjie Liu
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P. R. China
| | - Susanne Lindquist
- Department of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden
| | - Olle Hernell
- Department of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden
| | - Jianwu Wang
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P. R. China
| | - Jing Li
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P. R. China
| | - Ling Li
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P. R. China
| | - Yaofeng Zhao
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P. R. China
| | - Yunping Dai
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P. R. China
- * E-mail: (YD); (NL)
| | - Ning Li
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, P. R. China
- * E-mail: (YD); (NL)
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