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Pardridge WM. Kinetics of Blood-Brain Barrier Transport of Monoclonal Antibodies Targeting the Insulin Receptor and the Transferrin Receptor. Pharmaceuticals (Basel) 2021; 15:3. [PMID: 35056060 PMCID: PMC8778919 DOI: 10.3390/ph15010003] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 12/10/2021] [Accepted: 12/18/2021] [Indexed: 12/21/2022] Open
Abstract
Biologic drugs are large molecule pharmaceuticals that do not cross the blood-brain barrier (BBB), which is formed by the brain capillary endothelium. Biologics can be re-engineered for BBB transport as IgG fusion proteins, where the IgG domain is a monoclonal antibody (MAb) that targets an endogenous BBB transporter, such as the insulin receptor (IR) or transferrin receptor (TfR). The IR and TfR at the BBB transport the receptor-specific MAb in parallel with the transport of the endogenous ligand, insulin or transferrin. The kinetics of BBB transport of insulin or transferrin, or an IRMAb or TfRMAb, can be quantified with separate mathematical models. Mathematical models to estimate the half-time of receptor endocytosis, MAb or ligand exocytosis into brain extracellular space, or receptor recycling back to the endothelial luminal membrane were fit to the brain uptake of a TfRMAb or a IRMAb fusion protein in the Rhesus monkey. Model fits to the data also allow for estimates of the rates of association of the MAb in plasma with the IR or TfR that is embedded within the endothelial luminal membrane in vivo. The parameters generated from the model fits can be used to estimate the brain concentration profile of the MAb over time, and this brain exposure is shown to be a function of the rate of clearance of the antibody fusion protein from the plasma compartment.
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Transferrin Receptor Targeted Cellular Delivery of Doxorubicin Via a Reduction-Responsive Peptide-Drug Conjugate. Pharm Res 2019; 36:168. [DOI: 10.1007/s11095-019-2688-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 08/15/2019] [Indexed: 12/11/2022]
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Li S, Zhao H, Fan Y, Zhao G, Wang R, Wen F, Wang J, Wang X, Wang Y, Gao Y. Design, synthesis, and in vitro antitumor activity of a transferrin receptor-targeted peptide-doxorubicin conjugate. Chem Biol Drug Des 2019; 95:58-65. [PMID: 31452330 DOI: 10.1111/cbdd.13613] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 06/20/2019] [Accepted: 08/03/2019] [Indexed: 12/21/2022]
Abstract
In this study, a peptide-drug conjugate was designed and synthesized by connecting a transferrin receptor (TfR)-targeted binding peptide analog BP9a (CAHLHNRS) with doxorubicin (DOX) through N-succinimidyl-3-maleimidopropionate (SMP) as the cross-linker. Confocal laser scanning microscopy results indicated that free DOX mainly accumulated in the nuclei of both TfR overexpressed HepG2 hepatoma cells and L-O2 normal liver cells expressing low level of TfR; most of the BP9a-DOX conjugate displayed cytoplasmic location, and its cellular uptake by HepG2 cells was obviously reduced by TfR blockage test. Nevertheless, the cellular uptake of this conjugate by L-O2 cells was much less than that of free DOX. Meanwhile, the BP9a-DOX conjugate exhibited lower in vitro antiproliferative activity against HepG2 cells than free DOX, but its cytotoxic effect on L-O2 cells was decreased compared with that of free DOX. These results suggest that BP9a could be applied as a potential TfR-targeted peptide vector for selective drug delivery.
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Affiliation(s)
- Songtao Li
- Hebei Province Key Laboratory of Research and Development of Traditional Chinese Medicine, Institute of Chinese Mateia Medica, Chengde Medical University, Chengde, China
| | - Hongling Zhao
- Hebei Province Key Laboratory of Research and Development of Traditional Chinese Medicine, Institute of Chinese Mateia Medica, Chengde Medical University, Chengde, China
| | - Yanfang Fan
- Institute of Basic Medicine, Chengde Medical University, Chengde, China
| | - Guiqin Zhao
- Hebei Province Key Laboratory of Research and Development of Traditional Chinese Medicine, Institute of Chinese Mateia Medica, Chengde Medical University, Chengde, China
| | - Ruxing Wang
- Hebei Province Key Laboratory of Research and Development of Traditional Chinese Medicine, Institute of Chinese Mateia Medica, Chengde Medical University, Chengde, China
| | - Fuyu Wen
- Hebei Province Key Laboratory of Research and Development of Traditional Chinese Medicine, Institute of Chinese Mateia Medica, Chengde Medical University, Chengde, China
| | - Jianping Wang
- Department of Immunology, Chengde Medical University, Chengde, China
| | - Xiaohui Wang
- Institute of Basic Medicine, Chengde Medical University, Chengde, China
| | - Yu Wang
- Department of Traumatic Orthopaedics, Affiliated Hospital of Chengde Medical University, Chengde, China
| | - Yang Gao
- Hebei Province Key Laboratory of Research and Development of Traditional Chinese Medicine, Institute of Chinese Mateia Medica, Chengde Medical University, Chengde, China
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Pan L, Gong P, Wang X, Dong J, Yang J, Li J, Zhang X. The expressive identification and localization of bicoid-interacting protein 3 in the toxoplasma gondii Chinese I genotype Wh3 strain. Acta Trop 2019; 197:105040. [PMID: 31145875 DOI: 10.1016/j.actatropica.2019.05.031] [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: 12/28/2018] [Revised: 05/23/2019] [Accepted: 05/25/2019] [Indexed: 10/26/2022]
Abstract
Toxoplasma gondii is an important intracellular parasite that is distributed worldwide and can infect almost all warm-blooded animals. The Chinese I genotype Wh3 strain is the most common in China and has unique pathogenicity compared with other strains of T. gondii. Bicoid-interacting protein (Bin3) is predicted to be involved in the development and polarity of T. gondii, and the localization of this protein is necessary for studying the biological characteristics of the Chinese I genotypeWh3 strain of T. gondii. In this study, we established an in vitro the method of transforming the tachyzoites into bradyzoites to lay the foundations for further experimental studies. Parasites were induced by culturing in alkaline conditions, then the changes in parasites morphology were evaluated. SAG2C, BAG1 and SAG1 were used to identify parasites. The results show that the Chinese I genotype Wh3 strain exhibited pseudocysts and cysts in the alkaline conditions after being induced, and the bradyzoite stage expressed specific proteins at the same time. Bradyzoites, induced using an alkaline medium (pH = 8.2), had higher expression levels of the Bin3 protein than tachyzoites. The results of indirect immunofluorescence, using a Bin3 monoclonal antibody showed that the Bin3 protein is expressed in both free-state and pseudocysts tachyzoites, and in the cysts of the Chinese I genotype Wh3 strain. The Bin3 protein is located in the cytoplasm of free-state tachyzoites, secreted between the parasite and the pseudocyst membrane in pseudocysts, and distributed inside the cyst wall of cysts. These findings provide a basis for further study on the biological characteristics of the Chinese I genotype Wh3 strain.
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Wu M, Zhai S, Gao J, Wei D, Xue J, Zhou Y, Li N, Hu L. Diagnosis of hepatocellular carcinoma using a novel anti-glycocholic acid monoclonal antibody-based method. Oncol Lett 2019; 17:3103-3112. [PMID: 30867740 PMCID: PMC6396208 DOI: 10.3892/ol.2019.9943] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 12/05/2018] [Indexed: 02/05/2023] Open
Abstract
Glycocholic acid (GCA) is a novel identified biomarker for hepatocellular carcinoma (HCC). However, clinical pathological study of GCA has not been extensive due to the limited availability of anti-GCA monoclonal antibodies (mAbs) and restricted detection methods. In the present study, using human GCA conjugated with bovine serum albumin as the immunogen to immunize BALB/c mice, a novel anti-GCA mAb was generated and characterized. The isotypes of heavy chain and light chain of anti-GCA mAb were examined to be IgG2a and κ, respectively, with a high affinity constant (2.6×108 mol/l). The anti-GCA mAb binds GCA with high specificity and sensitivity, and the 50% inhibitory rate was 77.09 ng/ml. The present study also established a rapid, sensitive and efficient indirect competitive ELISA analysis using this anti-GCA mAb to detect the level of GCA produced by different HCC cell lines. Therefore, the present study may successfully develop a novel method for early HCC diagnosis, and also provide insights for further research and treatment of HCC.
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Affiliation(s)
- Miao Wu
- Department of Immunology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Songhui Zhai
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Julia Gao
- Department of Immunology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Dapeng Wei
- Department of Immunology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Jianxin Xue
- Department of Thoracic Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yuxi Zhou
- Department of Pharmacy, Mianyang People's Hospital, Mianyang, Sichuan 621000, P.R. China
| | - Nan Li
- Department of Immunology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Lijuan Hu
- Department of Immunology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610041, P.R. China
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Monoclonal Antibody TfR Monoclonal Antibody. Monoclon Antib Immunodiagn Immunother 2017; 36:35. [DOI: 10.1089/mab.2017.0004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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