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Rutledge JJ, Paegelow J, Ritchey J, Singh A, Rizzi T, Murray C, Gilliam L, Crisman E, Williams NJ, Holbrook TC. Nebulized glycosylated caffeic acid phenylether ester attenuation of environmental particulate-induced airway inflammation in horses. Front Vet Sci 2022; 9:958567. [PMID: 36406065 PMCID: PMC9669659 DOI: 10.3389/fvets.2022.958567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 10/05/2022] [Indexed: 11/06/2022] Open
Abstract
The objective of this study was to determine the extent that nebulized glycosylated caffeic acid phenylether ester-4-O-alpha-D-glucopyranoside (G-CAPE) attenuates particulate-induced airway inflammation in healthy horses. Our hypothesis was that nebulization with G-CAPE would result in improved respiratory scores, higher arterial oxygen partial pressure, and less inflammatory airway infiltrates in horses with induced airway inflammation, compared with untreated controls. Five healthy adult horses were housed inside a climate controlled, closed barn on straw bedding and fed ad lib moldy grass hay for 16 days to induce airway inflammation. An experimental crossover study was performed in which animals were treated with 200 mg G-CAPE dissolved in 45 mL of 10% triethanolamine (G-CAPE group) or 45 mL of 10% triethanolamine (CONTROL group), and clinical respiratory scoring, arterial blood gases, and bronchoalveolar lavages (BALs) were collected at predetermined time points up to 24 h post nebulization. While the mean neutrophil percentage decreased in treated horses compared to controls (9.3 ± 2.0 and 16.9 ± 2.4, respectively) at 6 hours post treatment (t = 6 h), the difference did not achieve statistical significance (p = 0.1154). Blood gas analysis did not differ significantly between groups. There was a significant difference in the mean respiratory scores of G-CAPE-treated horses between baseline and at 1-h post treatment (from 3.2 ± 0.7 to 1.6 ± 0.7, p = 0.0013). This study demonstrates that a single nebulized dose of G-CAPE decreased clinical respiratory scores 1 h post administration and decreased BAL percentage of neutrophils 6 h post administration in horses with particulate induced airway inflammation. This compound shows promise as an anti-inflammatory and warrants further investigation.
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Affiliation(s)
- Jessica J. Rutledge
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Jillian Paegelow
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Jerry Ritchey
- Department of Veterinary Pathobiology, Oklahoma State University, Stillwater, OK, United States
| | - Anuradha Singh
- Department of Chemistry, Oklahoma State University, Stillwater, OK, United States
| | - Theresa Rizzi
- Department of Veterinary Pathobiology, Oklahoma State University, Stillwater, OK, United States
| | - Cynthia Murray
- Department of Mathematics and Statistics, University of Central Oklahoma, Edmond, OK, United States
| | - Lyndi Gilliam
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Evan Crisman
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Natasha J. Williams
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
| | - Todd C. Holbrook
- Department of Veterinary Clinical Sciences, Oklahoma State University, Stillwater, OK, United States
- *Correspondence: Todd C. Holbrook
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Xu Y, Liu S, Bian L, Li Z, Luo C, Chen Y, Wu X. Engineering of a UDP-Glycosyltransferase for the Efficient Whole-Cell Biosynthesis of Siamenoside I in Escherichia coli. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:1601-1609. [PMID: 35099964 DOI: 10.1021/acs.jafc.1c07699] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The combination of the insufficient availability and the complex structure of siamenoside I (SI), the sweetest glucoside isolated from Siraitia grosvenorii to date, limited its use as a natural sweetener. To solve this problem, an improved biocatalyst, UGT-M2, was semi-rationally created by engineering the uridine diphosphate glycosyltransferase UGT94-289-2 from S. grosvenorii for the monoglucosylation of mogroside IIIE (MG IIIE) to SI. Subsequently, an engineered Escherichia coli cell was constructed, which combined UGT-M2 with a UDP-glucose regeneration system to circumvent the need for expensive UDP-glucose to produce SI. After optimization, high-purity SI (>96.4%) was efficiently prepared from MG IIIE at a 1 L scale with a productivity of 29.78 g/(L day) and a molar yield of 76.5% and without using exogenous UDP-glucose. This study not only developed a whole-cell approach for the preparation of SI but also provided an alternative glycosyltransferase variant for SI biosynthesis with synthetic biology in the future.
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Affiliation(s)
- Yuncong Xu
- Department of Biochemistry, College of Life Sciences and Technology, China Pharmaceutical University, 639 Longmian Road, Nanjing, Jiangsu Province 211198, PR China
| | - Shiqiang Liu
- Department of Biochemistry, College of Life Sciences and Technology, China Pharmaceutical University, 639 Longmian Road, Nanjing, Jiangsu Province 211198, PR China
| | - Liuyun Bian
- Department of Biochemistry, College of Life Sciences and Technology, China Pharmaceutical University, 639 Longmian Road, Nanjing, Jiangsu Province 211198, PR China
| | - Zhenlin Li
- Department of Pharmaceutical Analysis and Metabolomics, Jiangsu Province Academy of Traditional Chinese Medicine, 100 Shizi Street. Hongshan Road, Nanjing, Jiangsu Province 210028, PR China
| | - Chen Luo
- Department of Biochemistry, College of Life Sciences and Technology, China Pharmaceutical University, 639 Longmian Road, Nanjing, Jiangsu Province 211198, PR China
| | - Yijun Chen
- Laboratory of Chemical Biology, College of Life Sciences and Technology, China Pharmaceutical University, 639 Longmian Road, Nanjing, Jiangsu Province 211198, PR China
| | - Xuri Wu
- Department of Biochemistry, College of Life Sciences and Technology, China Pharmaceutical University, 639 Longmian Road, Nanjing, Jiangsu Province 211198, PR China
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A thermostable glycosyltransferase from Paenibacillus polymyxa NJPI29: recombinant expression, characterization, and application in synthesis of glycosides. 3 Biotech 2021; 11:314. [PMID: 34109099 DOI: 10.1007/s13205-021-02855-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 05/19/2021] [Indexed: 10/21/2022] Open
Abstract
Glycosylation is a prominent biological mechanism, affecting the structural and functional diversity of many natural products. In this study, a novel thermostable uridine diphosphate-dependent glycosyltransferase gene PpGT1 was cloned from Paenibacillus polymyxa NJPI29 and recombinantly expressed in B. subtilis WB600. The purified PpGT1 had a molecular weight of 45 kDa, as estimated using SDS-PAGE. The PpGT1 could catalyze the glycosylation of vanillic acid, methyl vanillate, caffeic acid, cinnamic alcohol, and ferulic acid. Moreover, PpGT1 possessed good thermostability and retained 80% of its original activity even after 12 h of incubation at 45 °C. In addition, PpGT1 remained stable within a neutral to alkaline pH range as well as in the presence of metal ions. The synthesis of methyl vanillate 4-O-β-D-glucoside by purified PpGT1 reached a yield 3.58 mM in a system with pH 8.0, 45 °C, 12 mM UDP-Glc, and 4 mM methyl vanillate. 3D-structure-based amino acid sequence alignments revealed that the catalytic residues and C-terminated PSPG motif were conserved. These unusual properties indicated that PpGT1 is a candidate UGT for valuable natural product industrial applications. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13205-021-02855-z.
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