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Karra DA, Chadwick CC, Stavroulaki EM, Pitropaki MN, Flouraki E, Allenspach K, Lidbury JA, Steiner JM, Xenoulis PG. Fecal acute phase proteins in cats with chronic enteropathies. J Vet Intern Med 2023; 37:1750-1759. [PMID: 37401847 PMCID: PMC10473003 DOI: 10.1111/jvim.16802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 06/21/2023] [Indexed: 07/05/2023] Open
Abstract
BACKGROUND Chronic enteropathies (CE) are common in cats and reliable biomarkers that can distinguish different causes and predict or monitor response to treatment are currently lacking. HYPOTHESIS To evaluate certain acute phase proteins in feces that could potentially be used as biomarkers in cats with CE. ANIMALS Twenty-eight cats with either inflammatory bowel disease (IBD; n = 13), food-responsive enteropathy (FRE; n = 3) or small cell gastrointestinal lymphoma (SCGL; n = 12) and 29 healthy control cats were prospectively enrolled. METHODS Fecal concentrations of haptoglobin, alpha-1-acid-glycoprotein (AGP), pancreatitis-associated protein-1 (PAP-1), ceruloplasmin, and C-reactive protein (CRP) were measured using Spatial Proximity Analyte Reagent Capture Luminescence (SPARCL) immunoassays before and after initiation of treatment. Cats were treated with diet and/or prednisolone (IBD cats), plus chlorambucil (SCGL cats). RESULTS Compared with controls, median fecal AGP concentrations were significantly lower (25.1 vs 1.8 μg/g; P = .003) and median fecal haptoglobin (0.17 vs 0.5 μg/g), PAP-1 (0.04 vs 0.4 μg/g) and ceruloplasmin (0.15 vs 4.2 μg/g) concentrations were significantly higher (P < .001) in cats with CE. Median fecal AGP concentrations were significantly lower (P = .01) in cats with IBD and FRE (0.6 μg/g) compared with cats with SCGL (10.75 μg/g). A significant reduction was found in CE cats after treatment for median fecal ceruloplasmin concentrations (6.36 vs 1.16 μg/g; P = .04). CONCLUSIONS Fecal AGP concentration shows promise to differentiate cats with SCGL from cats with IBD and FRE. Fecal ceruloplasmin concentrations may be useful to objectively monitor response to treatment in cats with CE.
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Affiliation(s)
| | | | | | | | | | - Karin Allenspach
- Iowa State UniversityCollege of Veterinary Medicine, Veterinary Clinical SciencesAmesIowaUSA
| | - Jonathan A. Lidbury
- Texas A&M University – Gastrointestinal LaboratoryCollege of Veterinary Medicine & Biomedical SciencesCollege StationTexasUSA
| | - Joerg M. Steiner
- Texas A&M UniversityGastrointestinal LaboratoryCollege StationTexasUSA
| | - Panagiotis G. Xenoulis
- University of ThessalySmall Animal ClinicKarditsaGreece
- Texas A&M UniversityGastrointestinal LaboratoryCollege StationTexasUSA
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Marshall T, Chen J, Viloria-Petit AM. Adipocyte-Derived Adipokines and Other Obesity-Associated Molecules in Feline Mammary Cancer. Biomedicines 2023; 11:2309. [PMID: 37626804 PMCID: PMC10452835 DOI: 10.3390/biomedicines11082309] [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: 07/04/2023] [Revised: 07/30/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023] Open
Abstract
Obesity has been identified as a serious health concern in domestic cats. Feline mammary cancer (FMC) is also a concern, as it is highly prevalent and aggressive. Considering the identified connection between obesity and breast cancer, it is worthwhile to investigate the potential obesity-cancer relationship in FMC. This review investigated the association between adipokines and other obesity-associated molecules and FMC, with the aim of identifying gaps in the current literature for future research. Based on the reports to date, it was found that tissue concentrations of leptin, serum concentrations of leptin receptor, serum amyloid A, and estrogen correlate positively with FMC, and serum concentrations of leptin correlate negatively with FMC. The roles of adiponectin and prolactin in FMC development were also investigated, but the reports are either lacking or insufficient to suggest an association. Numerous research gaps were identified and could be used as opportunities for future research. These include the need for studies on additional cohorts to confirm the association of leptin/leptin receptor and serum amyloid A with FMC, and to address the role of adiponectin and prolactin in FMC. It is also important to investigate the genetic determinants of FMC, evaluate the use of molecular-targeted therapies in FMC, and exploit the enrichment of the triple-negative immunophenotype in FMC to address current clinical needs for both human triple-negative breast cancer and FMC. Finally, mechanistic studies with any of the molecules reviewed are scarce and are important to generate hypotheses and ultimately advance our knowledge and the outcome of FMC.
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Affiliation(s)
| | | | - Alicia M. Viloria-Petit
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, ON N1G 2W1, Canada; (T.M.); (J.C.)
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AKIYOSHI M, HISASUE M, NEO S, AKIYOSHI M. Serum amyloid A (SAA) concentration in cats with gastrointestinal lymphoma. J Vet Med Sci 2023; 85:867-875. [PMID: 37357392 PMCID: PMC10466063 DOI: 10.1292/jvms.23-0043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 05/06/2023] [Indexed: 06/27/2023] Open
Abstract
The incidence of feline gastrointestinal (GI) lymphoma has recently increased. Serum amyloid A (SAA) levels are elevated in feline lymphoma. However, no reports have evaluated SAA concentrations and outcomes in feline GI lymphoma. This study aimed to evaluate the clinical utility of SAA and other factors in feline GI lymphoma to assess the outcomes with potential differences. The study included 39 client-owned cats diagnosed with GI lymphoma, which were divided into two groups: high- and low-grade lymphomas. Changes in SAA concentration, complete blood count (CBC), and biochemical profiles were analyzed at the time of initial presentation as well as on days 1, 28, and 56. Differences between the two groups were investigated. High-grade lymphoma was observed in 17 cats, whereas 22 cats showed low-grade lymphoma. SAA concentrations on the day of initial presentation were significantly higher in low-grade lymphoma than those in high-grade lymphoma (median, 12.4 µg/mL; range, 4.8-46.5 µg/mL vs. 3.8 µg/mL; 3.8-13.7 µg/mL; P=0.011). Elevated SAA concentration on day 56 in high-grade GI lymphoma was a poor prognostic factor. (Hazard Ratio=1.012, per 1 µg/mL increase; 95% confidence interval; 1.004-1.020, P=0.002). The SAA concentration on the day of initial presentation did not serve as a suitable prognostic factor and did not depend on the grade or stage of the lymphoma. However, continuous SAA concentration measurement may be useful for predicting the outcome of feline GI lymphoma.
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Affiliation(s)
- Makoto AKIYOSHI
- Laboratory of Small Animal Internal Medicine, Azabu
University, Kanagawa, Japan
- Akiyoshi Animal Clinic, Kanagawa, Japan
| | - Masaharu HISASUE
- Laboratory of Small Animal Internal Medicine, Azabu
University, Kanagawa, Japan
| | - Sakurako NEO
- Laboratory of Clinical Diagnosis, Azabu University,
Kanagawa, Japan
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Thalmeier S, Güssow A, Häuser MK, Bauer N, Hazuchova K. Cat alpha-1-acid glycoprotein enzyme-linked immunosorbent assay: performance characteristics and reference intervals. J Feline Med Surg 2023; 25:1098612X231162836. [PMID: 37145170 PMCID: PMC10811989 DOI: 10.1177/1098612x231162836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
OBJECTIVES The aim of this study was to evaluate performance of a feline-specific ELISA for the measurement of alpha-1-acid glycoprotein (AGP) and to establish a reference interval (RI). METHODS Surplus serum samples with low (~200 µg/ml), medium (~450 µg/ml) and high (~745 and 930 µg/ml) AGP concentrations were used to assess the intra- and inter-assay coefficients of variation (CVs). The quality goal for bioanalytical method validation was a CV of <20%. Linearity was assessed by serial dilution of a sample with a high AGP concentration. Spike recovery was evaluated by mixing samples with low, medium and high AGP concentrations at different ratios. To establish the RI, residual serum samples from 51 healthy adult cats that were presented for health examinations or blood donation between August 2020 and June 2021 were included. RESULTS The intra-assay CV was 8.5%, 4.3% and 4.0%, and the inter-assay CV was 18.8%, 15.5% and 11.5% for serum samples with low, medium and high AGP concentrations, respectively. Excellent linearity (R2 = 0.98) was demonstrated for AGP concentrations ranging between 251.6 and 954.4 µg/ml. Average recovery was 95.0-99.7%. The right-sided RI for AGP was 328 µg/ml (90% confidence interval 300-354). Age had a statistically significant impact (increasing values with older age, P = 0.0026), but sex did not (P = 0.44), on AGP concentrations. CONCLUSIONS AND RELEVANCE The ELISA was accurate and showed acceptable precision with the modification of dilution used in this study. AGP concentrations in this population appeared to increase with increasing age.
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Affiliation(s)
- Sabine Thalmeier
- Clinic for Small Animals (Internal Medicine, Clinical Pathology and Clinical Pathophysiology), Justus-Liebig-University Giessen, Giessen, Germany
| | - Arne Güssow
- Clinic for Small Animals (Internal Medicine, Clinical Pathology and Clinical Pathophysiology), Justus-Liebig-University Giessen, Giessen, Germany
| | - Mia K Häuser
- Clinic for Small Animals (Internal Medicine, Clinical Pathology and Clinical Pathophysiology), Justus-Liebig-University Giessen, Giessen, Germany
| | - Natali Bauer
- Clinic for Small Animals (Internal Medicine, Clinical Pathology and Clinical Pathophysiology), Justus-Liebig-University Giessen, Giessen, Germany
| | - Katarina Hazuchova
- Clinic for Small Animals (Internal Medicine, Clinical Pathology and Clinical Pathophysiology), Justus-Liebig-University Giessen, Giessen, Germany
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Rossi G. Acute phase proteins in cats: Diagnostic and prognostic role, future directions, and analytical challenges. Vet Clin Pathol 2023; 52 Suppl 1:37-49. [PMID: 36740231 DOI: 10.1111/vcp.13238] [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: 09/06/2022] [Revised: 01/05/2023] [Accepted: 01/09/2023] [Indexed: 02/07/2023]
Abstract
While clinical studies on acute phase proteins (APPs) have significantly increased in the last decade, and most commercial labs are now offering major APPs in their biochemical profiles, APP testing has not been widely adopted by veterinary clinical pathologists and veterinarians. Measurement of APP concentration is a useful marker for detecting the presence or absence of inflammation in cats with various diseases. APPs can also be reliably measured in different biological fluids (eg, effusions and urine) to improve their diagnostic utility. Measurement of APPs can be extremely beneficial in cats with feline infectious peritonitis (FIP) to discriminate between FIP and non-FIP cats with similar clinical presentations. Additional benefits come from multiple and sequential measurements of APPs, particularly in the assessment of therapeutic efficacy. APPs are more sensitive than WBC counts for early detection of inflammation and to demonstrate an early remission or recurrence of the diseases. Given the potential utility of APPs, more studies are warranted, with a particular focus on the applications of APPs to guide the length of antimicrobial therapies, as suggested by the antimicrobial stewardship policy. New inflammatory markers have been discovered in human medicine, with a higher specificity for distinguishing between septic versus nonseptic inflammatory diseases. It is desirable that these new markers be investigated in veterinary medicine, to further test the power of APPs in diagnostic setting.
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Affiliation(s)
- Gabriele Rossi
- School of Veterinary Medicine, College of Science, Health, Engineering and Education, Murdoch University, Perth, Western Australia, Australia.,Centre for Animal Production and Health, Murdoch University, Murdoch, Western Australia, Australia
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Schiavo L, Odatzoglou P, Hare C, Williams TL, Dobson JM. Serum amyloid A and other clinicopathological variables in cats with intermediate- and large-cell lymphoma. J Feline Med Surg 2022; 24:e603-e610. [PMID: 36416277 PMCID: PMC9742919 DOI: 10.1177/1098612x221135118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVES Serum amyloid A (SAA) concentrations are increased in cats with lymphoma vs healthy cats; however, the association between SAA concentrations and prognosis in cats with lymphoma is unclear. The aim of this study was to evaluate if SAA concentrations were different in cats with nasal vs non-nasal lymphoma, if SAA concentrations are prognostic in patients treated with high-dose chemotherapy and if SAA concentrations are correlated with other clinicopathological variables. METHODS Cats diagnosed with intermediate- or large-cell lymphoma between 2012 and 2022 with SAA concentration data available were included. Associations between tumour site (nasal vs non-nasal), stage, response to treatment and SAA concentration were evaluated using non-parametric statistics. Associations between SAA concentrations and stage with survival time were evaluated using Cox regression analysis. Patients with nasal tumours and those not receiving high-dose chemotherapy were excluded from the survival analyses. RESULTS Thirty-nine cats were included. Median SAA concentrations were significantly higher in non-nasal compared with nasal lymphoma (42 µg/ml [range <0.3-797] vs <0.3 µg/ml [range <0.3-0.9]; P = 0.026). SAA concentrations did not correlate with tumour stage. Median survival time for patients with non-nasal tumour and undergoing chemotherapy was 49 days (range 2-1726). Responders had a better median survival time than non-responders (273 days [range 43-1728] vs 39 days [range 2-169]; P <0.001), whereas SAA concentrations were not associated with survival time. Lower haematocrit at presentation was associated with a reduced median survival time (P = 0.007). CONCLUSIONS AND RELEVANCE In the population examined, no correlation between serum concentration of SAA and prognosis in patients with lymphoma was identified, while low haematocrit and lack of response to treatment were both found to be associated with survival time. SAA concentrations were elevated in patients with non-nasal lymphoma vs patients with tumours confined to the nasal cavity.
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Affiliation(s)
- Luca Schiavo
- Luca Schiavo DVM, MRCVS, Department of
Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES,
UK Emails: ;
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Mestrinho LA, Rosa R, Ramalho P, Branco V, Iglésias L, Pissarra H, Duarte A, Niza M. A pilot study to evaluate the serum Alpha-1 acid glycoprotein response in cats suffering from feline chronic gingivostomatitis. BMC Vet Res 2020; 16:390. [PMID: 33059691 PMCID: PMC7558631 DOI: 10.1186/s12917-020-02590-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Accepted: 09/24/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Feline chronic gingivostomatitis (FCGS) is a multifactorial immune-mediated disease that can lead to chronic pain, anorexia, and weight loss and has substantial health and welfare effects. Currently, the recommended treatment includes dental extractions to decrease the inflammatory stimulation associated with dental plaque. However, complete remission is observed in less than half of the cases, and the majority need comprehensive medical management. This study aimed to evaluate the serum levels of the acute phase protein alpha-1 acid glycoprotein (AGP) in cats with FCGS and to examine whether dental extractions contribute to a significant decrease in the systemic inflammatory response at two postoperative time points. RESULTS AGP serum concentrations in the cats with FCGS were significantly higher at all time points than that in the control groups and were significantly correlated with the global caudal stomatitis score at day 0 but not at day 30 or 60. A significant improvement of some clinical scores, such as perceived comfort and global caudal stomatitis, was observed 60 days after the dental extraction. However, the levels of AGP did not significantly change over time. CONCLUSIONS Cats with FCGS were more likely to have a systemic inflammatory response compared with age- and dental disease-matched controls. Dental extractions, in most cases, did not contribute to a significant decrease of AGP both at 30 and 60 days. Therefore, this study reinforces the need to pursue comprehensive medical management after dental extractions to attenuate the systemic inflammatory response as a result of this disease.
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Affiliation(s)
- Lisa A Mestrinho
- CIISA - Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477, Lisbon, Portugal.
| | - Rita Rosa
- Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477, Lisbon, Portugal
| | - Patrícia Ramalho
- Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477, Lisbon, Portugal
| | - Vasco Branco
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal
| | - Leonor Iglésias
- Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477, Lisbon, Portugal
| | - Hugo Pissarra
- CIISA - Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477, Lisbon, Portugal
| | - Ana Duarte
- CIISA - Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477, Lisbon, Portugal
| | - Maria Niza
- CIISA - Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, 1300-477, Lisbon, Portugal
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Lester S. New Tests in Feline Veterinary Medicine: When to Use Them and When to Stick with Tried-and-True Tests. Vet Clin North Am Small Anim Pract 2020; 50:883-898. [PMID: 32360014 DOI: 10.1016/j.cvsm.2020.03.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The focus of this article is on how interpretations of laboratory data can utilize both population and individual reference intervals, while making the most of routine testing procedures coupled with some of the newer laboratory tests, which can complement the existing tests in diagnosing disease.
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Affiliation(s)
- Sally Lester
- True North Veterinary Diagnostics, Langley, British Columbia, Canada; Pilchuck Veterinary Hospital, Snohomish, WA, USA.
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A Clinical Investigation on Serum Amyloid A Concentration in Client-Owned Healthy and Diseased Cats in a Primary Care Animal Hospital. Vet Sci 2020; 7:vetsci7020045. [PMID: 32326517 PMCID: PMC7355685 DOI: 10.3390/vetsci7020045] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 04/10/2020] [Accepted: 04/14/2020] [Indexed: 02/06/2023] Open
Abstract
Although measurement of serum amyloid A (SAA) concentration in client-owned cats has already been shown to be clinically useful, limited data are available on common diseases at primary care hospitals. In this study, we measured the SAA concentration in cats with various diseases and investigated their clinical significance using a primary care hospital as a population. We measured the SAA concentrations in healthy cats (n = 98) and those with various clinical signs (n = 444). The SAA concentrations in healthy cats did not differ significantly by age, breed, sex, and presence/absence of neutering/spaying. The SAA concentrations were significantly higher in the diseased cat group than in the healthy cat group (p < 0.001). We observed significant increases in SAA concentrations in cats with confirmed diagnosis of inflammatory disease such as upper respiratory tract infections (p < 0.001), pneumonia (p < 0.001), pyometra (p = 0.001), and feline infectious peritonitis (p < 0.001), compared with those observed in healthy cats. Conversely, no increase was observed in cardiomyopathy, hyperthyroidism, and diabetes mellitus without systemic inflammation. In univariate analysis, survival at 30 days (p = 0.03) differed significantly between the low and high SAA concentration groups, but not at 180 days. In multivariate analysis, survival at 30 days did not significantly affect SAA concentration. Measurement of SAA concentration is a useful biomarker for detecting the presence or absence of inflammation in diseased cats. However, it may not be useful as a biomarker for determining the prognosis of the disease.
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Smith SA, Waters NJ. Pharmacokinetic and Pharmacodynamic Considerations for Drugs Binding to Alpha-1-Acid Glycoprotein. Pharm Res 2018; 36:30. [PMID: 30593605 PMCID: PMC7089466 DOI: 10.1007/s11095-018-2551-x] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 11/28/2018] [Indexed: 12/13/2022]
Abstract
According to the free drug hypothesis only the unbound drug is available to act at physiological sites of action, and as such the importance of plasma protein binding primarily resides in its impact on pharmacokinetics and pharmacodynamics. Of the major plasma proteins, alpha-1-acid glycoprotein (AAG) represents an intriguing one primarily due to the high affinity, low capacity properties of this protein. In addition, there are marked species and age differences in protein expression, homology and drug binding affinity. As such, a thorough understanding of drug binding to AAG can help aid and improve the translation of pharmacokinetic/pharmacodynamic (PK/PD) relationships from preclinical species to human as well as adults to neonates. This review provides a comprehensive overview of our current understanding of the biochemistry of AAG; endogenous function, impact of disease, utility as a biomarker, and impact on PK/PD. Experimental considerations are discussed as well as recommendations for understanding the potential impact of AAG on PK through drug discovery and early development.
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Affiliation(s)
- Sherri A Smith
- Drug Metabolism, Pharmacokinetics and Bioanalytical, H3 Biomedicine, 300 Technology Square, Cambridge, Massachusetts, 02139, USA.
| | - Nigel J Waters
- Nonclinical Development, Relay Therapeutics, 215 First Street, Cambridge, Massachusetts, USA
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Przybycien-Szymanska MM, Yang Y, Ashley WW. Microparticle derived proteins as potential biomarkers for cerebral vasospasm post subarachnoid hemorrhage. A preliminary study. Clin Neurol Neurosurg 2016; 141:48-55. [DOI: 10.1016/j.clineuro.2015.12.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 12/14/2015] [Accepted: 12/15/2015] [Indexed: 02/07/2023]
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