1
|
Yang R, Hu J, Zeng B, Yang D, Li D, Yang M, Fan X, Li X, Mao X, Liu Y, Lyu Y, Li Y. Structural characterization of immune receptor family short pentraxins, C-reactive protein and serum amyloid P component, in primates. Dev Comp Immunol 2022; 130:104371. [PMID: 35131310 DOI: 10.1016/j.dci.2022.104371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 02/02/2022] [Indexed: 06/14/2023]
Abstract
The short pentraxins C-reactive protein (CRP) and serum amyloid P component (SAP) are a family of pattern-recognition molecules that play versatile roles in innate immunity and inflammation. A comprehensive description is currently lacking as to the genetic characteristics of these molecules in primates. In the present study, we analyzed genetic changes of CRP and SAP genes in this phylogenic lineage. The results revealed that adaptive selection has brought about interspecific diversities of both genes. The adaptively selected amino acid changes have occurred in or adjacent to the structural domains involved in ligand- and effector-binding and homologous aggregation. Each gene, however, exhibits a striking lack of genetic variation in both commonly-used non-human primate models Macaca fascicularis and M. mulatta. These findings highlight basic facts on the genetic characteristics of primate short pentraxins and would contribute powerfully to the extrapolation of their functional insights and physiological outcomes from primate models to humans.
Collapse
Affiliation(s)
- Rongrong Yang
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China
| | - Jia Hu
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China
| | - Bo Zeng
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China
| | - Deying Yang
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China
| | - Diyan Li
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China
| | - Mingyao Yang
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China
| | - Xiaolan Fan
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China
| | - Xiaoyan Li
- Beijing Anzhen Hospital, Capital Medical University, Beijing, People's Republic of China; The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Capital Medical University, Ministry of Education, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing, People's Republic of China
| | - Xueping Mao
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China
| | - Yulei Liu
- Beijing Anzhen Hospital, Capital Medical University, Beijing, People's Republic of China; The Key Laboratory of Remodeling-Related Cardiovascular Diseases, Capital Medical University, Ministry of Education, Beijing Institute of Heart, Lung and Blood Vessel Diseases, Beijing, People's Republic of China
| | - Yongqing Lyu
- The First Hospital of Kunming, Kunming, People's Republic of China.
| | - Yan Li
- College of Animal Science and Technology, Sichuan Agricultural University, Wenjiang, People's Republic of China; Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Wenjiang, People's Republic of China.
| |
Collapse
|
2
|
Wechalekar A, Antoni G, Al Azzam W, Bergström M, Biswas S, Chen C, Cheriyan J, Cleveland M, Cookson L, Galette P, Janiczek RL, Kwong RY, Lukas MA, Millns H, Richards D, Schneider I, Solomon SD, Sörensen J, Storey J, Thompson D, van Dongen G, Vugts DJ, Wall A, Wikström G, Falk RH. Pharmacodynamic evaluation and safety assessment of treatment with antibodies to serum amyloid P component in patients with cardiac amyloidosis: an open-label Phase 2 study and an adjunctive immuno-PET imaging study. BMC Cardiovasc Disord 2022; 22:49. [PMID: 35152886 PMCID: PMC8843022 DOI: 10.1186/s12872-021-02407-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 11/26/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND In a Phase I study treatment with the serum amyloid P component (SAP) depleter miridesap followed by monoclonal antibody to SAP (dezamizumab) showed removal of amyloid from liver, spleen and kidney in patients with systemic amyloidosis. We report results from a Phase 2 study and concurrent immuno-positron emission tomography (PET) study assessing efficacy, pharmacodynamics, pharmacokinetics, safety and cardiac uptake (of dezamizumab) following the same intervention in patients with cardiac amyloidosis. METHODS Both were uncontrolled open-label studies. After SAP depletion with miridesap, patients received ≤ 6 monthly doses of dezamizumab in the Phase 2 trial (n = 7), ≤ 2 doses of non-radiolabelled dezamizumab plus [89Zr]Zr-dezamizumab (total mass dose of 80 mg at session 1 and 500 mg at session 2) in the immuno-PET study (n = 2). Primary endpoints of the Phase 2 study were changed from baseline to follow-up (at 8 weeks) in left ventricular mass (LVM) by cardiac magnetic resonance imaging and safety. Primary endpoint of the immuno-PET study was [89Zr]Zr-dezamizumab cardiac uptake assessed via PET. RESULTS Dezamizumab produced no appreciable or consistent reduction in LVM nor improvement in cardiac function in the Phase 2 study. In the immuno-PET study, measurable cardiac uptake of [89Zr]Zr-dezamizumab, although seen in both patients, was moderate to low. Uptake was notably lower in the patient with higher LVM. Treatment-associated rash with cutaneous small-vessel vasculitis was observed in both studies. Abdominal large-vessel vasculitis after initial dezamizumab dosing (300 mg) occurred in the first patient with immunoglobulin light chain amyloidosis enrolled in the Phase 2 study. Symptom resolution was nearly complete within 24 h of intravenous methylprednisolone and dezamizumab discontinuation; abdominal computed tomography imaging showed vasculitis resolution by 8 weeks. CONCLUSIONS Unlike previous observations of visceral amyloid reduction, there was no appreciable evidence of amyloid removal in patients with cardiac amyloidosis in this Phase 2 trial, potentially related to limited cardiac uptake of dezamizumab as demonstrated in the immuno-PET study. The benefit-risk assessment for dezamizumab in cardiac amyloidosis was considered unfavourable after the incidence of large-vessel vasculitis and development for this indication was terminated. Trial registration NCT03044353 (2 February 2017) and NCT03417830 (25 January 2018).
Collapse
Affiliation(s)
| | - Gunnar Antoni
- Institutionen för Medicinska Vetenskaper, Uppsala University, Uppsala, Sweden
| | - Wasfi Al Azzam
- GlaxoSmithKline, Philadelphia, USA
- Takeda, Lexington, MA, USA
| | | | - Swethajit Biswas
- GlaxoSmithKline, Stevenage, Hertfordshire, UK
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Chao Chen
- GlaxoSmithKline, Stevenage, Hertfordshire, UK
| | - Joseph Cheriyan
- Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | | | | | | | | | | | | | | | - Duncan Richards
- GlaxoSmithKline, Stevenage, Hertfordshire, UK
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Ian Schneider
- GlaxoSmithKline, Cambridge, UK
- Consolidated Consulting LTD, Cambridge, UK
| | | | - Jens Sörensen
- Institutionen för Medicinska Vetenskaper, Uppsala University, Uppsala, Sweden
| | | | | | | | | | - Anders Wall
- Institutionen för Medicinska Vetenskaper, Uppsala University, Uppsala, Sweden
| | - Gerhard Wikström
- Institutionen för Medicinska Vetenskaper, Uppsala University, Uppsala, Sweden
| | | |
Collapse
|
3
|
Yang J, Zhou J, Zhou J, Wang H, Sun Z, Zhu X, He Y, Wong AHC, Liu F, Wang G. Serum amyloid P component level is associated with clinical response to escitalopram treatment in patients with major depressive disorder. J Psychiatr Res 2022; 146:172-178. [PMID: 34995992 DOI: 10.1016/j.jpsychires.2021.12.051] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 12/04/2021] [Accepted: 12/21/2021] [Indexed: 12/26/2022]
Abstract
Serum amyloid P component (SAP) is a universal constituent of human amyloid deposits, which has been implicated in Alzheimer's disease and major depressive disorder (MDD). However, the relationship between SAP level and depression severity remains obscure. The aims of this study were to investigate how SAP is involved in depression and to explore the association between SAP level and antidepressant treatment response. Patients with MDD (n = 85) who received escitalopram monotherapy for 8-12 weeks were selected from a multicenter open-label randomized clinical trial. The same number of healthy controls was recruited. Depression severity was measured according to the Hamilton Depression Rating Scale (HAMD-17) at baseline and weeks 4, 8, and 12. The plasma levels of SAP were measured at baseline, week 2 and week 12. As a result, baseline levels of SAP were significantly higher in depressed patients than in control subjects (p < 0.001). SAP levels at baseline were negatively associated with depression severity after escitalopram treatment (p < 0.05), and the changes in SAP levels from baseline to week 12 were highly correlated with the severity of depressive symptoms based on the HAMD-17 score (p < 0.05). Interestingly, treatment with escitalopram significantly decreased the plasma levels of SAP in females, but not in males. Altogether, our results suggest that SAP not only involved in the pathobiology of depression but also mediates the action of antidepressant medications.
Collapse
Affiliation(s)
- Jian Yang
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China; Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China, Beijing, China
| | - Jingjing Zhou
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China; Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China, Beijing, China
| | - Jia Zhou
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China
| | - Haixia Wang
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China
| | - Zuoli Sun
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China
| | - Xuequan Zhu
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China
| | - Yi He
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China
| | - Albert H C Wong
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada
| | - Fang Liu
- Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China, Beijing, China; Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
| | - Gang Wang
- The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China; Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China, Beijing, China.
| |
Collapse
|
4
|
Heidari M, Darbandi S, Darbani M, Amirjanati N, Bozorgmehr M, Zeraati H, Akhondi MM, Sadeghi MR. Evaluating the Potential of Three Sperm Surface Antigens as Egg-adhesion Biomarkers for Human Sperm Selection. J Reprod Infertil 2018; 19:203-210. [PMID: 30746335 PMCID: PMC6328979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND The selection of sperm with good genomic integrity and surface antigens is suggested for improving assisted reproductive technology (ART) outcome. The aim of this study was evaluating the heat shock protein (HSPA2), Dj-1 and serum amyloid P compound (SAP) three sperm surface proteomes as biomarkers for this purpose. METHODS In this study, semen samples were obtained from 114 men who presented at Avicenna Fertility Clinic for their treatment. The semen characteristics, DNA fragmentation Index (DFI), chromatin maturation index (CMI), biomarker levels, and their embryo quality were considered. The paired-samples t-test and independent-samples t-test were used for analyzing the data and p-values<0.05 were considered significant. RESULTS Outcomes exhibited the major reduction in HSPA2, DJ-1 and SAP following reduction in sperm quality and DNA integrity (p<0.001) with cut-off value of 14% (HSPA2), 12% (DJ-1) and 10% (SAP). The specificity of these three biomarkers was 95.2, 73.8 and 88.1%, respectively. Also, DFI (p<0.001), CMI (p<0.05), cleavage (p<0.05), and embryos quality (p<0.001) decreased significantly in abnormal spermiogram (ANS) group in compared with normal spermiogram (NS) group. It was shown that DFI was 97.1% in HSPA2, 76.5% in DJ-1 and 94.1% in SAP, and CMI was 95.0%, 75.50% and 87.5%, respectively. The significant correlation was found between of the three biomarkers and CMI (p<0.001), DFI (p<0.001) and embryos quality (p<0.001). CONCLUSION By comparing the efficiency of these three biomarkers for selecting sperm with the lowest level of chromatin damages, it seems that selection based on HSPA2 has significance over others.
Collapse
Affiliation(s)
- Mahnaz Heidari
- Reproductive Biotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Sara Darbandi
- Reproductive Biotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Mahsa Darbani
- Reproductive Biotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Naser Amirjanati
- Department of Andrology, Avicenna Fertility Clinic, Tehran, Iran
| | - Mahmood Bozorgmehr
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACERCR, Tehran, Iran
| | - Hojjat Zeraati
- Department of Epidemiology and Biostatistics, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Mehdi Akhondi
- Reproductive Biotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Mohammad Reza Sadeghi
- Monoclonal Antibody Research Center, Avicenna Research Institute, ACERCR, Tehran, Iran,Corresponding Author: Mohammad Reza Sadeghi, Reproductive Biotechnology Research Center, Avicenna Research Institute, ACECR, Shahid Beheshti University, Evin, Tehran, Iran E-mail:
| |
Collapse
|
5
|
Nagatoshi A, Ueda M, Ueda A, Tasaki M, Inoue Y, Ma Y, Masuda T, Mizukami M, Matsumoto S, Kosaka T, Kawano T, Ito T, Ando Y. Serum amyloid P component: A novel potential player in vessel degeneration in CADASIL. J Neurol Sci 2017; 379:69-76. [PMID: 28716282 DOI: 10.1016/j.jns.2017.05.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 04/24/2017] [Accepted: 05/16/2017] [Indexed: 11/19/2022]
Abstract
In cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL), granular osmiophilic material (GOM) may play some roles in inducing cerebrovascular events. To elucidate the pathogenesis of CADASIL, we used laser microdissection and liquid chromatography-tandem mass spectrometry to analyze cerebrovascular lesions of patients with CADASIL for GOM. The analyses detected serum amyloid P component (SAP), annexin A2, and periostin as the proteins with the largest increase in the samples, which also demonstrated NOTCH3. For the three proteins, anti-human SAP antibody had the strongest reaction in the lesions where the anti-human NOTCH3 antibody showed positive staining. Moreover, immunofluorescence staining with the two antibodies clearly showed co-localization of SAP and NOTCH3. mRNA analyses indicated no positive SAP expression in the brain materials, which suggested that the source of SAP found in the GOM was only the liver. A solid phase enzyme-linked immunosorbent assay confirmed the binding of SAP with NOTCH3. Serum SAP concentrations were neither up-regulated nor down-regulated in CADASIL patients, when compared with those in control subjects. SAP may play an important role in GOM formation although precise mechanisms remain to be elucidated.
Collapse
Affiliation(s)
- Akihito Nagatoshi
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Mitsuharu Ueda
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Akihiko Ueda
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Masayoshi Tasaki
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan; Department of Morphological and Physiological Sciences, Graduate School of Health Sciences, Kumamoto University, Kumamoto 862-0976, Japan
| | - Yasuteru Inoue
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Yihong Ma
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Teruaki Masuda
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Mayumi Mizukami
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Sayaka Matsumoto
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Takayuki Kosaka
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Takayuki Kawano
- Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Takaaki Ito
- Department of Pathology and Experimental Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Yukio Ando
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan.
| |
Collapse
|
6
|
Wang T, Sun L. CsSAP, a teleost serum amyloid P component, interacts with bacteria, promotes phagocytosis, and enhances host resistance against bacterial and viral infection. Dev Comp Immunol 2016; 55:12-20. [PMID: 26454233 DOI: 10.1016/j.dci.2015.10.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Revised: 10/02/2015] [Accepted: 10/02/2015] [Indexed: 06/05/2023]
Abstract
Serum amyloid P component (SAP) is a member of the pentraxins family that plays important roles in innate immunity in vertebrates. In fish, the biological function of SAP is essentially unknown. In this study, we examined the expression and function of a SAP homologue (CsSAP) from tongue sole Cynoglossus semilaevis. CsSAP shares 46%-58% overall sequence identities with known fish SAP and was upregulated in expression by bacterial and viral infection. Recombinant CsSAP (rCsSAP) exhibited differential binding capacities to a wide range of Gram-positive and Gram-negative bacteria and promoted uptake of the bound bacteria by host phagocytes. When introduced in vivo, rCsSAP enhanced host resistance not only to bacterial infection but also to viral infection. Consistently, antibody blockage of CsSAP significantly weakened the ability of tongue sole to clear invading bacteria. These results provide the first evidence that fish SAP contributes significantly to both antibacterial and antiviral immunities.
Collapse
Affiliation(s)
- Ting Wang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China
| | - Li Sun
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
| |
Collapse
|
7
|
Dorta-Estremera SM, Cao W. Human Pentraxins Bind to Misfolded Proteins and Inhibit Production of Type I Interferon Induced by Nucleic Acid-Containing Amyloid. J Clin Cell Immunol 2015; 6. [PMID: 31080694 DOI: 10.4172/2155-9899.1000332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Objective Amyloid deposition is linked to multiple human ailments, including neurodegenerative diseases, type 2 diabetes, and systemic amyloidosis. The assembly of misfolded proteins into amyloid fibrils involves an intermediate form, i.e., soluble amyloid precursor (AP), which exerts cytotoxic function. Insoluble amyloid also stimulates innate immune cells to elicit cytokine response and inflammation. How any of these misfolded proteins are controlled by the host remains obscure. Serum amyloid-P component (SAP) is a universal constituent of amyloid deposits. Short-chain pentraxins, which include both SAP and C-reactive protein (CRP), are pattern recognition molecules that bind to diverse ligands and promote the clearance of microbes and cell debris. Whether these pentraxins interact with AP and cofactor-containing amyloid and subsequently impact their function is not known. Methods and Results To detect the interaction between SAP and different types of amyloids, we performed dot blot analysis. The results showed that SAP invariably bound to protein-only, nucleic acid-containing and glycosaminoglycan-containing amyloid fibrils. This interaction required the presence of calcium. By ELISA, both SAP and CRP bound to soluble AP in the absence of divalent cations. Further characterization, by gel filtration, implied that SAP decamer may recognize AP whereas aggregated SAP preferentially associates with amyloid fibril. Although SAP binding did not affect cytotoxic function of AP, SAP potently inhibited the production of interferon-α from human plasmacytoid dendritic cells triggered by DNA-containing amyloid. Conclusions Our data suggest that short pentraxins differentially interact with various forms of misfolded proteins and, in particular, modulate the ability of nucleic acid-containing amyloid to stimulate aberrant type I interferon response. Hence, pentraxins may function as key players in modulating the pathogenesis of protein misfolding diseases as well as interferon-mediated autoimmune manifestation.
Collapse
Affiliation(s)
- Stephanie M Dorta-Estremera
- Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.,The University of Texas Graduate School of Biomedical Sciences, Houston, TX 77030, USA
| | - Wei Cao
- Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.,The University of Texas Graduate School of Biomedical Sciences, Houston, TX 77030, USA
| |
Collapse
|
8
|
Garcia M, Lipke P, Klotz S. Pathogenic microbial amyloids: Their function and the host response. OA Microbiol 2013; 1:2. [PMID: 25419543 PMCID: PMC4238391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Functional microbial amyloids are ubiquitous in nature and some contribute to the pathogenesis of infectious diseases. Three pathogenic microbial amyloids are compared and their contribution to the disease process explained. The recent demonstration and visualization of fungal amyloid in human invasive candidiasis is discussed. Moreover, the binding of host serum amyloid P component to Candida functional amyloid in invasive human disease is presented in light of its possible role of masking fungi from the host defenses.
Collapse
Affiliation(s)
- Mc Garcia
- Department of Biology, Brooklyn College of City University of New York, Brooklyn, NY
| | - Pn Lipke
- Department of Medicine, University of Arizona, Tucson, AZ
| | | |
Collapse
|
9
|
Kang GS, Gillespie PA, Chen LC. Inhalation exposure to nickel hydroxide nanoparticles induces systemic acute phase response in mice. Toxicol Res 2011; 27:19-23. [PMID: 24278546 PMCID: PMC3834512 DOI: 10.5487/tr.2011.27.1.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Revised: 02/15/2011] [Accepted: 02/17/2011] [Indexed: 11/20/2022] Open
Abstract
It has been proposed that acute phase response can be a mechanism by which inhaled particles exert adverse effects on the cardiovascular system. Although some of the human acute phase proteins have been widely studied as biomarkers of systemic inflammation or cardiovascular diseases, there are only a few studies that investigated the role of serum amyloid P (SAP) , a major acute phase protein in mice. In this study, we investigated the changes in SAP, following inhalation exposure to nickel hydroxide nanoparticles (nano-NH) . We conducted 1) acute (4 h) exposure to nano-NH at 100, 500, and 1000 μg/m3 and 2) sub-acute (4h/d for 3d) exposure at 1000 μg/m3, then measured serum SAP protein levels along with hepatic Sap mRNA levels. The results show that inhaled nano-NH can induce systemic acute phase response indicated by increased serum SAP levels and hepatic Sap mRNA levels. To the best of our knowledge, this is the first study showing induction of SAP in response to repeated particle exposure, and the results suggest that SAP can be used as a biomarker for systemic inflammation induced by inhaled particles.
Collapse
Affiliation(s)
- Gi Soo Kang
- Department of Environmental Medicine, New York University School of Medicine, 57 Old Forge Road, Tuxedo, NY 10987, USA
| | | | | |
Collapse
|