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Qiu J, Yang Y, Kong J, Cao Y, Liu Y, Luo H, Cao X. Quantification of pharmacokinetic profiles of a recombinant canine PD-1 fusion protein by validated sandwich ELISA method. Front Vet Sci 2022; 9:951176. [PMID: 35990262 PMCID: PMC9382074 DOI: 10.3389/fvets.2022.951176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 07/11/2022] [Indexed: 12/03/2022] Open
Abstract
Tumors are becoming a serious threat to the quality of life of human and dogs. Studies have shown that tumors have caused more than half of the deaths in older dogs. Similar to human, dogs will develop various and highly heterogeneous tumors, but there are currently no viable therapies for them. In human, immunotherapy has been used widely and considered as an effective treatment for tumors by immune checkpoint targets, which are also expressed on canine tumors, suggesting that immunotherapy may be a potential treatment for canine tumors. In this work, we developed a sandwich ELISA method to detect the concentration of recombinant canine PD-1 fusion protein in canine serum and investigated pharmacokinetics in canines after intravenous infusion administration. After being validated, the ELISA method showed an excellent linear relationship in 25.00–3,200.00 ng/ml in serum, and the R2 was more than 0.99 with four-parameter fitting. The precision and accuracy of intra-assay and inter-assay at the five different concentrations met the requirements of quantitative analysis. At the same time, no hook effect was observed at the concentration above ULOQ, and the stability was good under different predicted conditions with accuracy > 80%. The pharmacokinetic study in dogs has shown that the recombinant canine PD-1 fusion protein exhibited a typical biphasic PK profile after intravenous infusion administration, and the linear pharmacokinetic properties were observed between 1.00 and 12.00 mg/kg. Meanwhile, the T1/2 after intravenous infusion administration with non-compartmental analysis was about 5.79 days.
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Affiliation(s)
- Jicheng Qiu
- College of Veterinary Medicine, China Agricultural University, Beijing, China
- Laboratory of Quality and Safety Risk Assessment for Animal Products on Chemical Hazards (Beijing), Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Yuxin Yang
- College of Veterinary Medicine, China Agricultural University, Beijing, China
- Laboratory of Quality and Safety Risk Assessment for Animal Products on Chemical Hazards (Beijing), Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Jingyuan Kong
- College of Veterinary Medicine, China Agricultural University, Beijing, China
- Laboratory of Quality and Safety Risk Assessment for Animal Products on Chemical Hazards (Beijing), Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Yuying Cao
- College of Veterinary Medicine, China Agricultural University, Beijing, China
- Laboratory of Quality and Safety Risk Assessment for Animal Products on Chemical Hazards (Beijing), Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Yu Liu
- College of Veterinary Medicine, China Agricultural University, Beijing, China
- Laboratory of Quality and Safety Risk Assessment for Animal Products on Chemical Hazards (Beijing), Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Haoshu Luo
- College of Biological Sciences, China Agricultural University, Beijing, China
- Beijing VJTBio Co., LTD., Beijing, China
| | - Xingyuan Cao
- College of Veterinary Medicine, China Agricultural University, Beijing, China
- Laboratory of Quality and Safety Risk Assessment for Animal Products on Chemical Hazards (Beijing), Ministry of Agriculture and Rural Affairs, Beijing, China
- Laboratory of Detection for Veterinary Drug Residues and Illegal Additives, Ministry of Agriculture and Rural Affairs, Beijing, China
- *Correspondence: Xingyuan Cao
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Wang X, Gao Y, Sun X. Effect of Taspine hydrochloride on the repair of rat skin wounds by regulating keratinocyte growth factor signal. Bioengineered 2021; 13:789-799. [PMID: 34898359 PMCID: PMC8805989 DOI: 10.1080/21655979.2021.2012920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
To explore the regulation of keratinocyte growth factor (KGF) in the process of repairing rat skin wounds by taspine hydrochloride (TA/HCl), 45 male Sprague-Dawley (SD) rats were purchased and divided into an experimental group, a dimethyl sulfoxide (DMSO) control group, and a basic fibroblast growth factor (bFGF) control group, each with 15 only. A back trauma model was innovatively adopted to prevent rats from biting and contaminating. The wound healing time and healing rate of the rat, and the Hydroxyproline (Hyp) and KGF expressions were observed. Morphological changes of wound tissue and the number of capillaries were observed after hematoxylin-eosin (HE) staining. The results showed that wound healing rate of experimental group and bFGF group was significantly higher than that of DMSO group (P < 0.05) after 2–15 days, and wound healing time of experimental group was 18 days, which was significantly lower than that of the DMSO group (P < 0.05). Expression levels of Hyp and KGF in the granulation tissue of rats in the experimental group were much higher than those in the DMSO control group after trauma (P < 0.05). In early stage of wound tissue repair, the number of new capillaries formed in experimental group was significantly higher than that in DMSO control group (P < 0.05). In summary, this study innovatively focused on KGF. The mechanism of TA/HCL promoting rat skin wound healing was closely related to KGF.
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Affiliation(s)
- Xiumei Wang
- Department of Dermatology, Liaocheng People's Hospital, Liaocheng, China
| | - Yang Gao
- Department of Plastic & Cosmetic Surgery, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xiaochen Sun
- Department of Dermatology, People's Hospital of Lixia District of Jinan, Jinan, China
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