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Dubeykovskaya ZA, Duddempudi PK, Deng H, Valenti G, Cuti KL, Nagar K, Tailor Y, Guha C, Kitajewski J, Wang TC. Therapeutic potential of adenovirus-mediated TFF2-CTP-Flag peptide for treatment of colorectal cancer. Cancer Gene Ther 2018; 26:48-57. [PMID: 30042499 PMCID: PMC6760534 DOI: 10.1038/s41417-018-0036-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 06/05/2018] [Indexed: 02/06/2023]
Abstract
TFF2 is a small, secreted protein with anti-inflammatory properties. We previously have shown that TFF2 gene delivery via adenovirus (Ad-Tff2) suppresses colon tumor growth in colitis associated cancer. Therefore, systemic administration of TFF2 peptide could potentially provide a similar benefit. Because TFF2 shows a poor pharmacokinetic, we sought to modify the TFF2 peptide in a manner that would lower its clearance rate but retain bioactivity. Given the absence of a sequence-based prediction of TFF2 functionality, we chose to genetically fuse the C-terminus of TFF2 with the carboxyl-terminal peptide of human chorionic gonadotropin β subunit, and inserted into adenoviral vector that expresses Flag. The resulting Ad-Tff2-CTP-Flag construct translates into a TFF2 fused with two CTP and three Flag motifs. Administered Ad-Tff2-CTP-Flag decreased tumorigenesis and suppressed the expansion of myeloid cells in vivo. The fusion peptide TFF2-CTP-Flag delivered by adenovirus Ad-Tff2-CTP-Flag as well purified recombinant fusion TFF2-CTP-Flag was retained in the blood longer compared with wild-type TFF2 delivered by Ad-Tff2 or recombinant TFF2. Consistently, purified recombinant fusion TFF2-CTP-Flag suppressed expansion of myeloid cells by down-regulating cyclin D1 mRNA in vitro. Here, we demonstrate for the very first time the retained bioactivity and possible pharmacokinetic advantages of TFF2 with a modified C-terminus.
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Affiliation(s)
- Zinaida A Dubeykovskaya
- Division of Digestive and Liver Disease, Department of Medicine, Columbia University, College of Physicians and Surgeons, New York, NY, USA
| | - Phaneendra Kumar Duddempudi
- Department of Biochemistry, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY, 10461-1602, USA
| | - Huan Deng
- Division of Digestive and Liver Disease, Department of Medicine, Columbia University, College of Physicians and Surgeons, New York, NY, USA
| | - Giovanni Valenti
- Division of Digestive and Liver Disease, Department of Medicine, Columbia University, College of Physicians and Surgeons, New York, NY, USA
| | - Krystle L Cuti
- Division of Digestive and Liver Disease, Department of Medicine, Columbia University, College of Physicians and Surgeons, New York, NY, USA
| | - Karan Nagar
- Division of Digestive and Liver Disease, Department of Medicine, Columbia University, College of Physicians and Surgeons, New York, NY, USA
| | - Yagnesh Tailor
- Division of Digestive and Liver Disease, Department of Medicine, Columbia University, College of Physicians and Surgeons, New York, NY, USA
| | - Chandan Guha
- Department of Radiation Oncology, Montefiore Medical Center, Bronx, NY, USA
| | - Jan Kitajewski
- Department of Physiology and Biophysics, College of Medicine, University of Illinois at Chicago, 835S. Wolcott Ave. E-202, Chicago, IL, 60612, USA
| | - Timothy C Wang
- Division of Digestive and Liver Disease, Department of Medicine, Columbia University, College of Physicians and Surgeons, New York, NY, USA.
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Azzam N, Bar-Shalom R, Fares F. Conversion of TSH heterodimer to a single polypeptide chain increases bioactivity and longevity. Endocrinology 2012; 153:954-60. [PMID: 22234466 DOI: 10.1210/en.2011-1856] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
TSH is a dimeric glycoprotein hormone composed of a common α-subunit noncovalently linked to a hormone-specific β-subunit. Previously, the TSH heterodimer was successfully converted to an active single-chain hormone by genetically fusing α and β genes with [TSHβ- carboxyl-terminal peptide (CTP)-α] or without (TSHβ-α) the CTP of human chorionic gonadotropin β-subunit as a linker. In the present study, TSH variants were expressed in Chinese hamster ovarian cells. The results indicated that TSHβ-α single chain has the highest binding affinity to TSH receptor and the highest in vitro bioactivity. With regard to the in vivo bioactivity, all TSH variants increased the levels of T(4) in circulation after 2 and 4 h of treatment. However, the level of T(4) after treatment with TSH-wild type was significantly decreased after 6 and 8 h, compared with the levels after treatment with the other TSH variants. TSHβ-α and TSHβ-CTP-α single chains exhibited almost the same bioactivity after 8 h of treatment. Evaluating the half-life of TSH variants, TSHβ-CTP-α single chain revealed the longest half-life in circulation, whereas TSH-wild type exhibited the shortest serum half-life. These findings indicate that TSH single-chain variants with or without CTP as a linker may display conformational structures that increase binding affinity and serum half-life, thereby, suggesting novel attitudes for engineering and constructing superagonists of TSH, which may be used for treating different conditions of defected thyroid gland activity. Other prominent potential clinical use of these variants is in a diagnostic test for metastasis and recurrence of thyroid cancer.
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Affiliation(s)
- Naiel Azzam
- Department of Human Biology, Faculty of Natural Sciences, University of Haifa, Mount Carmel, Haifa 31095, Israel
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