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Mahon EK, Williams TL, Alves L. Serum C-reactive protein concentrations in dogs with structural and idiopathic epilepsy. Vet Rec 2023; 193:e3211. [PMID: 37503700 DOI: 10.1002/vetr.3211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 05/24/2023] [Accepted: 06/23/2023] [Indexed: 07/29/2023]
Abstract
BACKGROUND C-reactive protein (CRP) is an acute-phase protein produced by the liver during systemic inflammation. In humans, some epilepsies are associated with increased serum CRP (sCRP) concentrations, but this has yet to be proven in veterinary studies. Dogs with structural epilepsy (SE) and normal interictal neurological examination are hard to distinguish from dogs with idiopathic epilepsy (IE) without the use of advanced imaging. METHODS The study included eight dogs with SE and 12 dogs with IE from a referral hospital population. This was a retrospective observational cohort study. The Mann-Whitney test was used to compare the sCRP concentrations within 24 hours of the last epileptic seizure between dogs with SE or IE. RESULTS Dogs with SE had higher sCRP concentrations than dogs with IE (8.9 [range <2.2-53.2] mg/L vs. <2.2 [range <2.2-6.9] mg/L; p = 0.043). Five of the eight (62%) dogs with SE had an sCRP concentration above the reference interval, compared with none of the 12 dogs with IE. LIMITATIONS The small sample size was the major limitation of this study. Other inflammatory causes were also not exclusively ruled out, although further clinical investigations were not indicated. CONCLUSIONS This study found that sCRP concentrations were higher in this cohort of dogs with SE than in those with IE. Further studies with larger cohorts of dogs are warranted to validate if sCRP can be used as an additional biomarker for SE.
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Affiliation(s)
| | - Tim L Williams
- The Queen's Veterinary School Hospital, Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Lisa Alves
- The Queen's Veterinary School Hospital, Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
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2
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Jaffey JA, Shubitz LF, Johnson MDL, Bolch CA, da Cunha A, Murthy AK, Lopez BS, Monasky R, Carswell I, Spiker J, Neubert MJ, Menghani SV. Evaluation of Host Constitutive and Ex Vivo Coccidioidal Antigen-Stimulated Immune Response in Dogs with Naturally Acquired Coccidioidomycosis. J Fungi (Basel) 2023; 9:jof9020213. [PMID: 36836327 PMCID: PMC9959558 DOI: 10.3390/jof9020213] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/10/2023] [Accepted: 01/30/2023] [Indexed: 02/09/2023] Open
Abstract
The early innate immune response to coccidioidomycosis has proven to be pivotal in directing the adaptive immune response and disease outcome in mice and humans but is unexplored in dogs. The objectives of this study were to evaluate the innate immune profile of dogs with coccidioidomycosis and determine if differences exist based on the extent of infection (i.e., pulmonary or disseminated). A total of 28 dogs with coccidioidomycosis (pulmonary, n = 16; disseminated, n = 12) and 10 seronegative healthy controls were enrolled. Immunologic testing was performed immediately, without ex vivo incubation (i.e., constitutive), and after coccidioidal antigen stimulation of whole blood cultures. Whole blood cultures were incubated with a phosphate-buffered solution (PBS) (negative control) or a coccidioidal antigen (rCTS1 (105-310); 10 µg/mL) for 24 h. A validated canine-specific multiplex bead-based assay was used to measure 12 cytokines in plasma and cell culture supernatant. Serum C-reactive protein (CRP) was measured with an ELISA assay. Leukocyte expression of toll-like receptors (TLRs)2 and TLR4 was measured using flow cytometry. Dogs with coccidioidomycosis had higher constitutive plasma keratinocyte chemotactic (KC)-like concentrations (p = 0.02) and serum CRP concentrations compared to controls (p < 0.001). Moreover, dogs with pulmonary coccidioidomycosis had higher serum CRP concentrations than those with dissemination (p = 0.001). Peripheral blood leukocytes from dogs with coccidioidomycosis produced higher concentrations of tumor necrosis factor (TNF)-α (p = 0.0003), interleukin (IL)-6 (p = 0.04), interferon (IFN)-γ (p = 0.03), monocyte chemoattractant protein (MCP)-1 (p = 0.02), IL-10 (p = 0.02), and lower IL-8 (p = 0.003) in supernatants following coccidioidal antigen stimulation when compared to those from control dogs. There was no detectable difference between dogs with pulmonary and disseminated disease. No differences in constitutive or stimulated leukocyte TLR2 and TLR4 expression were found. These results provide information about the constitutive and coccidioidal antigen-specific stimulated immune profile in dogs with naturally acquired coccidioidomycosis.
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Affiliation(s)
- Jared A. Jaffey
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
- Correspondence:
| | - Lisa F. Shubitz
- Valley Fever Center for Excellence, College of Medicine-Tucson, University of Arizona, Tucson, AZ 85724, USA
| | - Michael D. L. Johnson
- Department of Immunobiology, Valley Fever Center for Excellence, BIO5 Institute, Asthma and Airway Disease Research Center, University of Arizona, College of Medicine-Tucson, Tucson, AZ 85724, USA
| | - Charlotte A. Bolch
- Office of Research and Sponsored Programs, College of Graduate Studies, Midwestern University, Glendale, AZ 85308, USA
| | - Anderson da Cunha
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Ashlesh K. Murthy
- Department of Pathology, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Brina S. Lopez
- Department of Pathology, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Ross Monasky
- Department of Pathology, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Imani Carswell
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Justine Spiker
- Department of Specialty Medicine, College of Veterinary Medicine, Midwestern University, Glendale, AZ 85308, USA
| | - Miranda J. Neubert
- Department of Immunobiology, College of Medicine-Tucson, Tucson, AZ 85724, USA
| | - Sanjay V. Menghani
- Department of Immunobiology, Medical Scientist Training Program, College of Medicine-Tucson, Tucson, AZ 85724, USA
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Jaffey JA, Wycislo KL. Inflammatory phenotype, clinicopathologic variables, and effects of long-term methylene blue in dogs with hereditary methemoglobinemia caused by cytochrome b5 reductase deficiency. Am J Vet Res 2023; 84:ajvr.22.09.0155. [PMID: 36638001 DOI: 10.2460/ajvr.22.09.0155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
OBJECTIVE To determine whether dogs with cytochrome b5 reductase (CYB5R) deficiency have a constitutive proinflammatory phenotype, characterize hematologic and serum chemistry results, and describe changes in methemoglobin (MetHb) levels and serum C-reactive protein (CRP) concentrations after long-term per os (PO) methylene blue (MB) therapy. ANIMALS 21 client-owned dogs (CYB5R deficient, n = 10; healthy controls, 11). PROCEDURES In this prospective, case-control study, methemoglobin levels were measured using a blood gas analyzer with co-oximetry. Plasma tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and interleukin-10 (IL-10) concentrations were measured using a canine-specific multiplex bead-based assay. Serum CRP concentrations were measured with a canine-specific commercial ELISA kit. Serum CRP concentration and MetHb levels were measured in 6 dogs with CYB5R deficiency after ≥ 60 days of PO MB therapy. RESULTS As expected, MetHb levels were higher in dogs with CYB5R deficiency compared to controls (P < .001). Plasma TNF-α, IL-6, IL-10, and serum CRP concentrations were no different between CYB5R-deficient and control dogs. Dogs with CYB5R deficiency had lower absolute lymphocyte (P = .005) and eosinophil counts (P = .04) and higher alanine transaminase (P = .04) and alkaline phosphatase activity (P = .02) than controls, but these changes were not clinically relevant. Methemoglobin levels decreased after PO MB therapy (P = .03). CLINICAL RELEVANCE These results suggest that otherwise healthy dogs with CYB5R deficiency do not have a constitutive proinflammatory phenotype and clinically relevant abnormalities in hematologic and serum chemistry panels are not expected. Dogs with decreased quality of life attributed to methemoglobinemia from CYB5R deficiency might benefit from PO MB therapy.
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Affiliation(s)
- Jared A Jaffey
- Department of Specialty Medicine, Midwestern University College of Veterinary Medicine, Glendale, AZ
| | - Kathryn L Wycislo
- Department of Pathology, Midwestern University College of Veterinary Medicine, Glendale, AZ
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Jaffey JA, Kreisler R, Shubitz LF, Backus RC, Hostnik ET, Wycislo KL, Monasky R, Schaffer M, Holland C. Serum 25-hydroxyvitamin D concentrations in dogs with coccidioidomycosis and variables associated with extent of clinically evident disease. Vet Med (Auckl) 2023; 37:150-160. [PMID: 36629803 PMCID: PMC9889719 DOI: 10.1111/jvim.16629] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 12/19/2022] [Indexed: 01/12/2023]
Abstract
BACKGROUND Clinicopathologic variables predictive of disseminated coccidioidomycosis are known in humans but have not been explored in dogs. Serum 25-hydroxyvitamin (OH)D correlates with severity of disease of various etiologies in dogs but its role in coccidioidomycosis is unknown. OBJECTIVE Determine whether serum 25(OH)D concentrations are different in dogs with coccidioidomycosis compared with healthy controls and if clinicopathologic variables are associated with extent of disease. ANIMALS Thirty-five dogs with coccidioidomycosis (pulmonary, n = 13; disseminated, n = 15; uncharacterized, n = 7), and 25 healthy control dogs. METHODS Prospective cohort study. Serum 25(OH)D and C-reactive protein (CRP) concentrations were measured with modified-HPLC and a commercial ELISA kit, respectively. RESULTS There was no difference in 25(OH)D concentrations between dogs with coccidioidomycosis (median, interquartile range [IQR]; 31.9 ng/mL, 23.3-49.2) and controls (29.5 ng/mL, 25.6-40.8, P = .73). Serum 25(OH)D concentration was lower in dogs with coccidioidomycosis and IgG titers ≥1:32 than dogs with titers below this cut-off (P = .02). Dogs with IgG titers ≥1:32 were more likely to have disseminated disease (OR, 7.5; 95% CI: 1.1-68; P = .03). Serum CRP concentrations were higher in dogs with IgG titers ≥1:16 (median, IQR; 4474.8 ng/mL, 2885.8-8236.1) than in those below this cut-off (151.2 ng/mL, 30.4-2907.3; P = .02). There was a significant inverse association between serum 25(OH)D and CRP at 25(OH)D concentrations ≤33 ng/mL. CONCLUSION AND CLINICAL IMPORTANCE Serum 25(OH)D concentration was lower for dogs with IgG titers ≥1:32, indicating a potential association between semi-quantitative titers and 25(OH)D concentrations in dogs with coccidioidomycosis. IgG titers ≥1:32 yielded higher odds of disseminated disease, but was inadequate as a standalone test to determine form of disease.
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Affiliation(s)
- Jared A. Jaffey
- Department of Specialty MedicineMidwestern University College of Veterinary MedicineGlendaleArizonaUSA
| | - Rachael Kreisler
- Department of Primary Care, Shelter, and Community MedicineMidwestern University College of Veterinary MedicineGlendaleArizonaUSA
| | - Lisa F. Shubitz
- Valley Fever Center for ExcellenceUniversity of Arizona College of Medicine‐TucsonTucsonArizonaUSA
| | - Robert C. Backus
- Department of Veterinary Medicine and Surgery, Veterinary Health CenterUniversity of MissouriColumbiaMissouriUSA
| | - Eric T. Hostnik
- Department of Veterinary Clinical Sciences, College of Veterinary MedicineThe Ohio State UniversityColumbusOhioUSA
| | - Kathryn L. Wycislo
- Department of PathologyMidwestern University College of Veterinary MedicineGlendaleArizonaUSA
| | - Ross Monasky
- Department of Specialty MedicineMidwestern University College of Veterinary MedicineGlendaleArizonaUSA
| | - Magen Schaffer
- Department of Specialty MedicineMidwestern University College of Veterinary MedicineGlendaleArizonaUSA
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Pinheiro BQ, de Magalhães FF, Alves FWDS, Silva ING, Faustino AMR, da Silva LDM. CA 15-3, CRP, and LDH correlates with prognostic parameters in canine mammary neoplasms. Anim Reprod 2023; 20:e20220086. [PMID: 36938312 PMCID: PMC10023068 DOI: 10.1590/1984-3143-ar2022-0086] [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: 09/18/2022] [Accepted: 02/01/2023] [Indexed: 03/15/2023] Open
Abstract
The identification of putative prognostic factors in canine mammary neoplasms (CMNs) has been focused on tissue-specific biomarkers, but the serum biomarkers, including cancer antigen 15-3 (CA 15-3), c-reactive protein (CRP), and lactate dehydrogenase (LDH) have been demonstrated to display clinical application in cases of CMNs. The aim of the study was to evaluate the levels of these serum biomarkers and their association with well-established prognostic factors in CMNs. Samples from 15 female canines with CMNs and 15 clinically healthy ones were collected. The results were evaluated using the Tukey's, Pearson, or Spearman tests. The cut-off point, sensitivity, specificity, and area under curve (AUC) were evaluated using the receiver operating characteristic (ROC) curve analysis in a logistic regression model (P<0.05). The levels of CA 15-3, CRP and LDH were significantly higher in the serum of female dogs with CMNs compared to the healthy ones. Moreover, these factors were positively correlated with ulceration, tumor size, histopathological grade, metastatic lymph node, and clinical staging. Female dogs with CMNs were found to exhibit highest serum levels of CA 15-3, CRP, and LDH. Therefore, they can be applied to improve the efficacy of the diagnosis and prognostic evaluation in casas of CMNs.
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Affiliation(s)
- Breno Queiroz Pinheiro
- Laboratório de Reprodução de Carnívoros, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Francisco Felipe de Magalhães
- Laboratório de Reprodução de Carnívoros, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Francisco Wesley da Silva Alves
- Laboratório de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Isaac Neto Goes Silva
- Laboratório de Patologia Clínica Veterinária, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Augusto Manuel Rodrigues Faustino
- Departamento de Patologia e Imunologia Molecular, Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Lúcia Daniel Machado da Silva
- Laboratório de Reprodução de Carnívoros, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
- Corresponding author:
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Jaffey JA, Su D, Monasky R, Hanratty B, Flannery E, Horman M. Effects of a whole food diet on immune function and inflammatory phenotype in healthy dogs: A randomized, open-labeled, cross-over clinical trial. Front Vet Sci 2022; 9:898056. [PMID: 36082214 PMCID: PMC9447376 DOI: 10.3389/fvets.2022.898056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 07/01/2022] [Indexed: 11/23/2022] Open
Abstract
Whole foods in humans decrease inflammation and risk for various diseases, as well as increase weight loss and immune function. Nutrition has been shown to be an integral component in the management of various diseases in dogs but the immunologic and anti-inflammatory effects of whole food diets have not been explored. Therefore, our objective was to assess the effect of feeding a whole food diet on immune function and inflammatory phenotype in healthy dogs. A prospective, randomized, open-labeled, cross-over clinical trial was performed. Sixteen healthy client-owned dogs were fed either a whole food or an extruded dry diet, and after 67 days, they were fed the alternate diet for an additional 67 days. Blood samples were obtained at the completion of each treatment arm (i.e., days 67 and 134). Serum c-reactive protein (CRP), haptoglobin (Hp), and serum amyloid-A (SAA) were measured with ELISA assays. Whole blood cultures were performed with exposure to a phosphate-buffered solution (PBS), lipopolysaccharide (LPS), and lipoteichoic acid (LTA). A canine specific multiplex bead-based assay was then used to measure tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-10, granulocyte-macrophage colony-stimulating factor (GM-CSF), IL-2, IL-8, and monocyte chemoattractant protein (MCP)-1 concentrations. Granulocyte/monocyte (GM) phagocytosis and oxidative burst associated with Escherichia coli were evaluated via flow cytometry. Dogs fed a whole food diet had significantly lower TNF-α-to-IL-10 ratios (P = 0.05) and higher production of IL-8 (P = 0.03) with LTA-exposed leukocytes compared to dogs fed an extruded dry diet. There were no between-treatment differences in the remaining leukocyte cytokine responses, serum CRP, Hp, SAA concentrations, or GM phagocytic and oxidative burst capacities. Whole food diets could have immunomodulatory effects in dogs. Future studies in non-healthy dogs are warranted.
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Affiliation(s)
- Jared A. Jaffey
- Department of Specialty Medicine, Midwestern University College of Veterinary Medicine, Glendale, AZ, United States
- *Correspondence: Jared A. Jaffey
| | - Dan Su
- JustFoodForDogs LLC, Irvine, CA, United States
| | - Ross Monasky
- Department of Specialty Medicine, Midwestern University College of Veterinary Medicine, Glendale, AZ, United States
| | - Brenna Hanratty
- Department of Specialty Medicine, Midwestern University College of Veterinary Medicine, Glendale, AZ, United States
| | - Elizabeth Flannery
- Department of Specialty Medicine, Midwestern University College of Veterinary Medicine, Glendale, AZ, United States
| | - Melissa Horman
- Department of Specialty Medicine, Midwestern University College of Veterinary Medicine, Glendale, AZ, United States
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Ragone A, Salzillo A, Spina A, Zappavigna S, Caraglia M, Sapio L, Naviglio S. Protein Kinase A Detection in Human Urine Samples. J Clin Med 2021; 10:4096. [PMID: 34575203 PMCID: PMC8464865 DOI: 10.3390/jcm10184096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/27/2021] [Accepted: 09/10/2021] [Indexed: 12/26/2022] Open
Abstract
Actively involved in tumor maintenance, cAMP-dependent protein kinase A (PKA) has been proposed as a putative biomarker in cancer. Recently, an active PKA form has been identified in human sera and PKA autoantibodies have been detected in cancer patients. However, their serum functions, as well as diagnostic significance, remain largely unknown. Although several PKA detection assays have been developed, none refer to a laboratory diagnostic procedure. Among these, ELISA and Western blotting (WB) assays have been employed in PKA detection. Since, to the best of our knowledge, there are no data showing its presence in human urine samples, herein, we explore the possibility of PKA's existence in this biological specimen. Interestingly, among the 30 screened urines by quantitative sandwich ELISA, we recognized detectable PKA levels in 5 different samples, and of those two exhibited a considerable high concentration. To corroborate these results, we also evaluated PKA's presence in both positive and negative ELISA urines by WB. Remarkably, immunoblotting analysis confirmed PKA's existence in certain, but not in all, human urine specimens. Despite being quite preliminary, these findings firstly identify PKA in urine samples and provide evidence for its potential clinic usage as a diagnostic analyte in laboratory medicine.
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Affiliation(s)
| | | | | | | | | | - Luigi Sapio
- Department of Precision Medicine, University of Campania “Luigi Vanvitelli”, Via L. De Crecchio 7, 80138 Naples, Italy; (A.R.); (A.S.); (A.S.); (S.Z.); (M.C.); (S.N.)
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AniScan Using Extracellular Cyclic AMP-Dependent Protein Kinase A as a Serum Biomarker Assay for the Diagnosis of Malignant Tumors in Dogs. SENSORS 2020; 20:s20154075. [PMID: 32707843 PMCID: PMC7436096 DOI: 10.3390/s20154075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 07/12/2020] [Accepted: 07/20/2020] [Indexed: 11/17/2022]
Abstract
The early detection of tumors improves chances of decreased morbidity and prolonged survival. Serum biomarkers are convenient to use and have several advantages over other approaches, such as accuracy and straightforward protocols. Reliable biomarkers from easily accessible sources are warranted for the development of cost-effective assays for routine screening, particularly in veterinary medicine. Extracellular c-AMP-dependent protein kinase A (ECPKA) is a cytosolic leakage enzyme. The diagnostic accuracy of detecting autoantibodies against ECPKA was found to be higher than that of ECPKA activity from enzymatic assays, which use a complicated method. Here, we investigated the diagnostic significance of measuring serum ECPKA autoantibody levels using an in-house kit (AniScan cancer detection kit; Biattic, Anyang, Korea). We used sera from 550 dogs, including healthy dogs and those with malignant and benign tumors. Serum ECPKA and immunoglobulin G were determined using the AniScan cancer detection kit. ECPKA autoantibody levels were significantly higher (p < 0.01) in malignant tumors than in benign tumors, non-tumor diseases, and healthy controls. On the basis of sensitivity and specificity values, AniScan ECPKA is a rapid and easy-to-use assay that can be applied to screen malignant tumors from benign tumors or other diseases in dogs.
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Wu Y, Li Y, Liu J, Chen M, Li W, Chen Y, Xu M. The diagnostic value of extracellular protein kinase A (ECPKA) in serum for gastric and colorectal cancer. Transl Cancer Res 2020; 9:3870-3878. [PMID: 35117754 PMCID: PMC8797401 DOI: 10.21037/tcr-20-764] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 04/24/2020] [Indexed: 01/26/2023]
Abstract
Background For the biomarkers of cancer, many chromosomal and genetic alterations have been examined as possible. However, some tumors do not display a clear molecular and genetic signature. While there are some cellular processes regulated by second messenger intracellular pathways indeed involved in carcinogenesis. The first intracellular second messenger was described as cyclic adenosine 3',5'-monophosphate (cAMP), and cAMP-dependent protein kinase (PKA) play a crucial role in several biological processes; The dysregulation of PKA-mediated signaling in several types of cancer should be investigated. More interesting, the alpha catalytic subunit of PKA (PKACα) could be secreted into the conditioned medium by different types of cancer cells, and it also existed in the serum of some cancer patients, defined as extracellular protein kinase A (ECPKA). Methods The levels of serum PKACα from healthy people, gastric cancer and colon cancer patients were detected by ELISA kits. Western blotting was used to detect the expression of PKACα in cancer tissue and the adjacent mucosa. Mann-Whitney test was applied to analyze the patients’ characteristics and serum PKACα. ROC analyses were performed to further evaluate the utility of PKACα in cancer diagnosis. The correlation of serum PKACα and T stage, age, and tumor markers were analyzed by Spearman rank and Pearson correlation analysis, respectively. Results There were significant differences of PKACα in serum between the volunteers and the gastric cancers (P<0.01), but not the colorectal cancers (P>0.05). ROC analyses evaluated the utility of PKACα for gastric cancer with 61.90% sensitivities and 87.50% specificities. The serum PKACα was correlated with tumor marker CA50, while there was no significant difference of PKACα expression between the gastric/colorectal cancer tissue and the adjacent mucosa. Conclusions The above results implied that PKACα levels might be a potential biomarker for the early screening of gastric cancers. Moreover, further research is still needed to investigate the role of secreted PKACα and the regulatory mechanism in tumor progression.
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Affiliation(s)
- Yan Wu
- Department of Physiology, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Yafang Li
- Department of Physiology, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Junqiang Liu
- Department of Gastroenterology, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Mengjiao Chen
- Department of Physiology, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Wei Li
- The Fourth Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Yongchang Chen
- Department of Physiology, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Min Xu
- Department of Gastroenterology, Affiliated Hospital of Jiangsu University, Zhenjiang, China
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10
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Gredal H, Thomsen BB, Westrup U, Boza-Serrano A, Deierborg T, McEvoy FJ, Platt S, Lambertsen KL, Berendt M. Diagnosis and long-term outcome in dogs with acute onset intracranial signs. J Small Anim Pract 2019; 61:101-109. [PMID: 31691284 DOI: 10.1111/jsap.13078] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 08/20/2019] [Accepted: 08/21/2019] [Indexed: 11/28/2022]
Abstract
OBJECTIVES To investigate dogs with acute onset of intracranial signs suspected of stroke by primary veterinary clinicians, and establish possible differential diagnoses and long-term outcome. In addition, serum C-reactive protein and plasma cytokines were investigated as potential biomarkers of disease. MATERIALS AND METHODS All cases were evaluated by neurologic examination, routine haematology and biochemistry and measurement of serum C-reactive protein, plasma cytokine concentrations (interleukin-2, -6, -8, -10, tumour necrosis factor) and low-field MRI. RESULTS Primary veterinarians contacted the investigators with 85 suspected stroke cases. Only 20 met the inclusion criteria. Of these, two were diagnosed with ischaemic stroke. Other causes were idiopathic vestibular syndrome (n=6), brain tumour (n=5) and inflammatory brain disease (n=2); in five cases a precise diagnosis could not be determined. Median survival times were: brain tumour, 3 days, idiopathic vestibular syndrome, 315 days, ischaemic stroke, 365 days and inflammatory central nervous system (CNS) disease, 468 days. The median plasma concentrations of interleukin-2, -6, -8, -10 or tumour necrosis factor were not significantly increased in any of the diagnosis groups compared to healthy controls. Serum C-reactive protein was higher in dogs with brain tumours and inflammatory brain disease but not above the upper bound of the reference interval. CLINICAL SIGNIFICANCE Dogs that present with acute onset intracranial disease may have ischaemic stroke but are more likely to have other causes. Many dogs with such acute onset of neurological dysfunction (brain tumours excluded) may recover within a couple of weeks despite their initial severe clinical appearance.
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Affiliation(s)
- H Gredal
- Department of Veterinary Clinical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, DK-1870 Frederiksberg C, Copenhagen, Denmark
| | - B B Thomsen
- Department of Veterinary Clinical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, DK-1870 Frederiksberg C, Copenhagen, Denmark
| | - U Westrup
- Department of Veterinary Clinical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, DK-1870 Frederiksberg C, Copenhagen, Denmark
| | - A Boza-Serrano
- Experimental Neuroinflammation Laboratory, Department of Experimental Medical Science, BMC, Lund University, 22100, Lund, Sweden
| | - T Deierborg
- Experimental Neuroinflammation Laboratory, Department of Experimental Medical Science, BMC, Lund University, 22100, Lund, Sweden
| | - F J McEvoy
- Department of Veterinary Clinical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, DK-1870 Frederiksberg C, Copenhagen, Denmark
| | - S Platt
- Department of Small Animal Medicine and Surgery, University of Georgia, Athens, Georgia, GA30602, USA
| | - K L Lambertsen
- Department of Neurobiology Research, Institute of Molecular Medicine, University of Southern Denmark, Odense, Denmark.,Department of Neurology, Odense University Hospital, DK-5000, Odense, Denmark
| | - M Berendt
- Department of Veterinary Clinical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, DK-1870 Frederiksberg C, Copenhagen, Denmark
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Ryu MO, Kim BG, Choi US, Baek KH, Song YK, Li Q, Seo KW, Ryeom S, Youn HY, Bhang DH. Extracellular cyclic adenosine monophosphate-dependent protein kinase A autoantibody and C-reactive protein as serum biomarkers for diagnosis of cancer in dogs. Vet Comp Oncol 2018; 17:99-106. [PMID: 30411459 PMCID: PMC6375080 DOI: 10.1111/vco.12450] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 10/03/2018] [Accepted: 10/03/2018] [Indexed: 11/28/2022]
Abstract
Protein kinase A, a cyclic adenosine monophosphate (AMP)‐dependent enzyme, normally exists within mammalian cells; however, in cancer cells, it can leak out and be found in the serum. Extracellular cyclic AMP‐dependent protein kinase A (ECPKA) has been determined to increase in the serum of cancer‐bearing dogs. However, there have been no reports in the veterinary literature on serum ECPKA autoantibody (ECPKA‐Ab) expression in dogs with cancer. The aim of this study was to evaluate ECPKA‐Ab and C‐reactive protein (CRP) as serum biomarkers for cancer in dogs. ECPKA‐Ab and CRP levels were detected by an enzyme‐linked immunosorbent assay in serum samples from dogs with malignant tumours (n = 167), benign tumours (n = 42), or non‐tumour disease (n = 155) and from healthy control dogs (n = 123). ECPKA‐Ab and CRP levels were significantly higher in the dogs with malignant tumours than in those with benign tumours or non‐tumour diseases, as well as in the healthy controls (P < 0.001, Kruskal‐Wallis test). There was a significant positive correlation between the neoplastic index, which was developed using ECPKA‐Ab and CRP levels, and the presence of cancer in dogs (P < 0.001); the area under the receiver‐operating characteristic curve was estimated to be >0.85 (P < 0.001). In conclusion, ECPKA‐Ab is a potential serum biomarker for a broad spectrum of cancers. Combined measurement of CRP and ECPKA‐Ab levels in serum improves the sensitivity and accuracy of a diagnosis of cancer in dogs.
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Affiliation(s)
- Min-Ok Ryu
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Byung-Gak Kim
- Department of Molecular and Cellular Biology, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | - Ul-Soo Choi
- Department of Veterinary Clinical Pathology and Bio-safety Research Institute, College of Veterinary Medicine, Chonbuk National University, Jeonju, Republic of Korea
| | - Kwan-Hyuck Baek
- Department of Molecular and Cellular Biology, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
| | | | - Qiang Li
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Kyoung-Won Seo
- College of Veterinary Medicine, Chungnam National University, Daejeon, Republic of Korea
| | - Sandra Ryeom
- Department of Cancer Biology, Perelman School of Medicine at the University of Pennsylvania, Pennsylvania
| | - Hwa-Young Youn
- Laboratory of Veterinary Internal Medicine, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Dong-Ha Bhang
- Department of Molecular and Cellular Biology, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea.,BK21Plus Program for 21st Century Biomedical Science Leader Development, Sungkyunkwan University School of Medicine, Suwon, Republic of Korea
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