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López‐Gómez N, Piñeiro IR, Fernández Y. Successful treatment but delayed complete recovery of griseofulvin‐induced bone marrow hypoplasia in an FIV‐seronegative cat. VETERINARY RECORD CASE REPORTS 2022. [DOI: 10.1002/vrc2.480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Natalia López‐Gómez
- Department of Internal Medicine Hospital Veterinario Puchol Madrid Spain
- Hospital Veterinario Universidad Complutense de Madrid Madrid Spain
| | | | - Yordan Fernández
- Department of Internal Medicine Hospital Veterinario Puchol Madrid Spain
- AniCura Imavet Referencia Veterinaria, O Milladoiro A Coruña Spain
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Chi HJ, Park M, Han JK, Kim SM, Kang S, Yang JH, Cha SH. APB-F1, a long-acting feline granulocyte colony-stimulating factor fusion protein, created by exploiting FL335, a chimeric Fab specific for feline serum albumin. Vet Immunol Immunopathol 2021; 240:110322. [PMID: 34509747 DOI: 10.1016/j.vetimm.2021.110322] [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: 03/15/2021] [Revised: 08/12/2021] [Accepted: 08/26/2021] [Indexed: 10/20/2022]
Abstract
Off-label use of a human granulocyte colony stimulating factor (hG-CSF) has been allowed to treat dogs and cats with neutropenia. However, repeated administration of hG-CSF induces undesirable anti-drug antibody (ADA) responses, implying the necessity of animal-derived G-CSF as a therapeutic reagent, preferably with a long-acting capability. Herein, we generated a recombinant fusion protein by genetically combining FL335, a chimeric Fab specific for feline serum albumin (FSA), and feline G-CSF (fG-CSF), with the ultimate goal of developing a long-acting therapeutic fG-CSF for cats. The resulting FL335-fG-CSF fusion protein, referred to as APB-F1, was produced well as a functional form in a Chinese hamster ovary (CHO) expression system. In in vitro analyses, APB-F1 bound to FSA at high affinity (KD = 400 pM) and possessed 0.78 × 107 U/mg G-CSF biological activity, clearly proving its biological functionality. Pharmacokinetic (PK) and pharmacodynamic (PD) studies using healthy cats revealed that the serum half-life (t1/2) of APB-F1 was increased five times compared with that of fG-CSF (t1/2 = 13.3 h vs. 2.7 h) in subcutaneous (SC) injections. Additionally, APB-F1 induced a profound and sustained increase in white blood cell (WBC) and actual neutrophil count (ANC) up to 10 days, which was far superior to other G-CSF preparations, including filgrastim (Neupogen™) and even pegfilgrastim (Neulasta™). Conclusively, a long-acting fG-CSF with potent in vivo bioactivity was successfully created by using FL335; thus, we provided evidence that our "anti-serum albumin Fab-associated" (SAFA) technology can be applied reliably in developing valuable long-acting biologics in veterinary medicine.
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Affiliation(s)
- Hyun-Jin Chi
- Aprilbio Co., Rm 602, Biomedical Science Building, Kangwon National University, Chuncheon, Republic of Korea; Department of Systems Immunology, Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Mihyun Park
- Aprilbio Co., Rm 602, Biomedical Science Building, Kangwon National University, Chuncheon, Republic of Korea; Department of Systems Immunology, Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Jae-Kyu Han
- Aprilbio Co., Rm 602, Biomedical Science Building, Kangwon National University, Chuncheon, Republic of Korea
| | - Sun-Mi Kim
- Aprilbio Co., Rm 602, Biomedical Science Building, Kangwon National University, Chuncheon, Republic of Korea
| | - SeungGoo Kang
- Department of Systems Immunology, Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Jin-Hyuk Yang
- Aprilbio Co., Rm 602, Biomedical Science Building, Kangwon National University, Chuncheon, Republic of Korea; Department of Systems Immunology, Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea
| | - Sang-Hoon Cha
- Aprilbio Co., Rm 602, Biomedical Science Building, Kangwon National University, Chuncheon, Republic of Korea; Department of Systems Immunology, Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, Republic of Korea.
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Coleman JK, Sakagawa Y, Tanabe T, Offner MJ, Noon-Song EN, Coisman JG, Roff SR, Kondo H, Yamamoto JK, Abbott JR. Pegylated feline granulocyte colony-stimulating factor increases neutrophil levels in cats. Vet J 2014; 200:44-50. [PMID: 24662027 DOI: 10.1016/j.tvjl.2014.01.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Revised: 12/14/2013] [Accepted: 01/29/2014] [Indexed: 11/27/2022]
Abstract
Neutropenia can often be corrected by treatment with granulocyte-colony stimulating factor (G-CSF) and off-label use of commercial human G-CSF (HuG-CSF) is a commonly used treatment for neutropenic animals. However, long-term HuG-CSF treatment can be associated with adverse effects, including neutropenia. Here, feline (Fe) G-CSF was produced in Pichia pastoris, pegylated (Peg) FeG-CSF and tested in cats. A randomized controlled clinical trial was conducted to evaluate the efficacy of PegFeG-CSF compared to FeG-CSF or HuG-CSF in FIV-infected (n=14), FIV-uninfected healthy cats (n=19), and in HuG-CSF-induced neutropenic cats (n=4). Daily FeG-CSF doses induced higher neutrophil production than HuG-CSF after the second week of treatment (P ⩽ 0.002). Weekly doses of PegFeG-CSF induced higher neutrophil counts and showed greater sustained activity than weekly doses of FeG-CSF. PegFeG-CSF provided the most therapeutic and sustainable neutrophil production (P<0.001) in both FIV-uninfected and FIV-infected cats, without the development of neutralizing antibodies. Conversely, all HuG-CSF-treated cats developed neutralizing antibodies, suggesting cross-reactive antibodies to endogenous G-CSF in a majority of the cases with severe neutropenia. Strikingly, when PegFeG-CSF was used to rescue cats with HuG-CSF-induced neutropenia, clinically normal neutrophil numbers returned. Thus, PegFeG-CSF appears to be a superior treatment for neutropenia in feline patients.
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Affiliation(s)
- J K Coleman
- Department of Infectious Disease and Pathology, College of Veterinary Medicine, University of Florida, P.O. Box 11088, Gainesville, FL 32611-0880, USA
| | - Y Sakagawa
- Department of Infectious Disease and Pathology, College of Veterinary Medicine, University of Florida, P.O. Box 11088, Gainesville, FL 32611-0880, USA
| | - T Tanabe
- Department of Infectious Disease and Pathology, College of Veterinary Medicine, University of Florida, P.O. Box 11088, Gainesville, FL 32611-0880, USA
| | - M J Offner
- Department of Infectious Disease and Pathology, College of Veterinary Medicine, University of Florida, P.O. Box 11088, Gainesville, FL 32611-0880, USA
| | - E N Noon-Song
- Department of Infectious Disease and Pathology, College of Veterinary Medicine, University of Florida, P.O. Box 11088, Gainesville, FL 32611-0880, USA
| | - J G Coisman
- Department of Infectious Disease and Pathology, College of Veterinary Medicine, University of Florida, P.O. Box 11088, Gainesville, FL 32611-0880, USA
| | - S R Roff
- Department of Infectious Disease and Pathology, College of Veterinary Medicine, University of Florida, P.O. Box 11088, Gainesville, FL 32611-0880, USA
| | - H Kondo
- Department of Infectious Disease and Pathology, College of Veterinary Medicine, University of Florida, P.O. Box 11088, Gainesville, FL 32611-0880, USA
| | - J K Yamamoto
- Department of Infectious Disease and Pathology, College of Veterinary Medicine, University of Florida, P.O. Box 11088, Gainesville, FL 32611-0880, USA.
| | - J R Abbott
- Department of Infectious Disease and Pathology, College of Veterinary Medicine, University of Florida, P.O. Box 11088, Gainesville, FL 32611-0880, USA
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Sykes JE, Papich MG. Antiviral and Immunomodulatory Drugs. CANINE AND FELINE INFECTIOUS DISEASES 2014. [PMCID: PMC7152038 DOI: 10.1016/b978-1-4377-0795-3.00007-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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Evaluation of different antiretroviral drug protocols on naturally infected feline immunodeficiency virus (FIV) cats in the late phase of the asymptomatic stage of infection. Viruses 2012; 4:924-39. [PMID: 22816032 PMCID: PMC3397354 DOI: 10.3390/v4060924] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Revised: 05/14/2012] [Accepted: 05/24/2012] [Indexed: 12/04/2022] Open
Abstract
The aim of this study was to evaluate the efficacy of the antiretrovirals: Zidovudine (ZDV) alone; ZDV + Recombinant Human Interferon-α (rHuIFN-α); ZDV + Lamivudine (3TC) and ZDV + valproic acid (Valp) on naturally feline immunodeficiency virus (FIV)-infected cats, in the late phase of the asymptomatic stage of infection. The follow-up was performed over one year, through clinical evaluation and the determination of viral loads and CD4+/CD8+ ratios. Neurological signs were studied by visual and auditory evoked potentials (VEP, AEP) and the responses were abnormal in 80% of the FIV-infected cats. After one year, an improvement in VEP and AEP was observed in the ZDV + Valp group and a worsening in the group receiving ZDV + rHuIFN-α. The CD4+/CD8+ ratio showed a significant increase (both intra and inter-groups) only in ZDV and ZDV + 3TC, between their pre-treatment and one year values, as well as among the other groups. Viral load only showed a significant decrease in ZDV and ZDV + 3TC groups, when comparing the values at one year of treatment vs. pre-treatment values and when the different groups were compared. In addition, the viral load decrease was significantly more pronounced in the ZDV + 3TC vs. ZDV group. We conclude that ZDV and ZDV + 3TC produce significant reductions in viral load and stimulate a recovery of the CD4+/CD8+ ratio, compared with the other protocols. It is clear that the addition of 3TC resulted in a greater reduction in viral load than use of ZDV as a single drug. Therefore, the combination ZDV + 3TC could be more effective than the sole use of ZDV.
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Infectious Diseases. THE CAT 2012. [PMCID: PMC7161403 DOI: 10.1016/b978-1-4377-0660-4.00033-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Recombinant canine granulocyte colony-stimulating factor accelerates recovery from cyclophosphamide-induced neutropenia in dogs. Vet Immunol Immunopathol 2011; 142:271-5. [DOI: 10.1016/j.vetimm.2011.05.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Revised: 04/08/2011] [Accepted: 05/13/2011] [Indexed: 11/21/2022]
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Hosie MJ, Addie D, Belák S, Boucraut-Baralon C, Egberink H, Frymus T, Gruffydd-Jones T, Hartmann K, Lloret A, Lutz H, Marsilio F, Pennisi MG, Radford AD, Thiry E, Truyen U, Horzinek MC. Feline immunodeficiency. ABCD guidelines on prevention and management. J Feline Med Surg 2009; 11:575-84. [PMID: 19481037 PMCID: PMC7129779 DOI: 10.1016/j.jfms.2009.05.006] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Overview Feline immunodeficiency virus (FIV) is a retrovirus closely related to human immunodeficiency virus. Most felids are susceptible to FIV, but humans are not. Feline immunodeficiency virus is endemic in domestic cat populations worldwide. The virus loses infectivity quickly outside the host and is susceptible to all disinfectants. Infection Feline immunodeficiency virus is transmitted via bites. The risk of transmission is low in households with socially well-adapted cats. Transmission from mother to kittens may occur, especially if the queen is undergoing an acute infection. Cats with FIV are persistently infected in spite of their ability to mount antibody and cell-mediated immune responses. Disease signs Infected cats generally remain free of clinical signs for several years, and some cats never develop disease, depending on the infecting isolate. Most clinical signs are the consequence of immunodeficiency and secondary infection. Typical manifestations are chronic gingivostomatitis, chronic rhinitis, lymphadenopathy, weight loss and immune-mediated glomerulonephritis. Diagnosis Positive in-practice ELISA results obtained in a low-prevalence or low-risk population should always be confirmed by a laboratory. Western blot is the ‘gold standard’ laboratory test for FIV serology. PCR-based assays vary in performance. Disease management Cats should never be euthanased solely on the basis of an FIV-positive test result. Cats infected with FIV may live as long as uninfected cats, with appropriate management. Asymptomatic FIV-infected cats should be neutered to avoid fighting and virus transmission. Infected cats should receive regular veterinary health checks. They can be housed in the same ward as other patients, but should be kept in individual cages. Vaccination recommendations At present, there is no FIV vaccine commercially available in Europe. Potential benefits and risks of vaccinating FIV-infected cats should be assessed on an individual cat basis. Needles and surgical instruments used on FIV-positive cats may transmit the virus to other cats, so strict hygiene is essential.
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Yamamoto A, Iwata A, Saito T, Watanabe F, Ueda S. Expression and purification of canine granulocyte colony-stimulating factor (cG-CSF). Vet Immunol Immunopathol 2009; 130:221-5. [PMID: 19339059 DOI: 10.1016/j.vetimm.2009.02.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2008] [Revised: 01/20/2009] [Accepted: 02/16/2009] [Indexed: 11/16/2022]
Abstract
Canine granulocyte colony-stimulating factor (cG-CSF) with modification of cysteine at position 17 to serine was expressed in Brevibacillus choshinensis HPD31. cG-CSF secreted into the culture medium was purified by ammonium sulfate precipitation and consecutive column chromatography, using butyl sepharose and DEAE sepharose. Biological activity of the recombinant cG-CSF was 8.0 x 10(6) U/mg protein, as determined by its stimulatory effect on NFS-60 cell proliferation. Purified cG-CSF was subcutaneously administered once a day for two successive days to dogs (1, 5, 25, or 125 microg). Neutrophil count increased the following day in all dogs except those administered the lowest dose (1 microg). No severe side effects were observed in dogs after administration of cG-CSF.
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Affiliation(s)
- Akira Yamamoto
- Nippon Institute for Biological Science, Shin-Machi 9-2221-1, Ome, Tokyo 198-0024, Japan.
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