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Sha Q, Escobar Galvis ML, Madaj ZB, Keaton SA, Smart L, Edgerly YM, Anis E, Leach R, Osborne LM, Achtyes E, Brundin L. Dysregulated placental expression of kynurenine pathway enzymes is associated with inflammation and depression in pregnancy. Brain Behav Immun 2024; 119:146-153. [PMID: 38555986 PMCID: PMC11210184 DOI: 10.1016/j.bbi.2024.03.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 03/26/2024] [Accepted: 03/28/2024] [Indexed: 04/02/2024] Open
Abstract
BACKGROUND Perinatal depression (including antenatal-, postnatal-, and depression that spans both timepoints) is a prevalent disorder with high morbidity that affects both mother and child. Even though the full biological blueprints of perinatal depression remain incomplete, multiple studies indicate that, at least for antenatal depression, the disorder has an inflammatory component likely linked to a dysregulation of the enzymatic kynurenine pathway. The production of neuroactive metabolites in this pathway, including quinolinic acid (QUIN), is upregulated in the placenta due to the multiple immunological roles of the metabolites during pregnancy. Since neuroactive metabolites produced by the pathway also may affect mood by directly affecting glutamate neurotransmission, we sought to investigate whether the placental expression of kynurenine pathway enzymes controlling QUIN production was associated with both peripheral inflammation and depressive symptoms during pregnancy. METHODS 68 placentas obtained at birth were analyzed using qPCR to determine the expression of kynurenine pathway enzymes. Cytokines and metabolites were quantified in plasma using high-sensitivity electroluminescence and ultra-performance liquid chromatography, respectively. Maternal depressive symptoms were assessed using the Edinburgh Postnatal Depression Scale (EPDS) throughout pregnancy and the post-partum. Associations between these factors were assessed using robust linear regression with ranked enzymes. RESULTS Low placental quinolinate phosphoribosyl transferase (QPRT), the enzyme responsible for degrading QUIN, was associated with higher IL-6 and higher QUIN/kynurenic acid ratios at the 3rd trimester. Moreover, women with severe depressive symptoms in the 3rd trimester had significantly lower placental expression of both QPRT and 2-amino-3-carboxymuconate-6-semialdehyde decarboxylase (ACMSD); impaired activity of these two enzymes leads to QUIN accumulation. CONCLUSION Overall, our data support that a compromised placental environment, featuring low expression of critical kynurenine pathway enzymes is associated with increased levels of plasma cytokines and the dysregulated kynurenine metabolite pattern observed in depressed women during pregnancy.
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Affiliation(s)
- Qiong Sha
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
| | | | - Zachary B Madaj
- Bioinformatics and Biostatistics Core, Van Andel Institute, Grand Rapids, MI, USA
| | - Sarah A Keaton
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
| | - LeAnn Smart
- Pine Rest Christian Mental Health Services, Grand Rapids, MI, USA
| | | | - Ehraz Anis
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA
| | - Richard Leach
- Department of Obstetrics, Gynecology and Reproductive Biology, Michigan State University, East Lansing, MI, USA
| | - Lauren M Osborne
- Department of Obstetrics and Gynecology, Weill Cornell Medicine, New York, NY, USA; Department of Psychiatry, Weill Cornell Medicine, New York, NY, USA
| | - Eric Achtyes
- Pine Rest Christian Mental Health Services, Grand Rapids, MI, USA; Department of Psychiatry, Western Michigan University Homer Stryker M.D. School of Medicine, Kalamazoo, MI, USA
| | - Lena Brundin
- Department of Neurodegenerative Science, Van Andel Institute, Grand Rapids, MI, USA.
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2
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Tamir Z, Animut A, Dugassa S, Belachew M, Abera A, Tsegaye A, Erko B. Plasmodium infections and associated risk factors among parturients in Jawi district, northwest Ethiopia: a cross-sectional study. Malar J 2023; 22:367. [PMID: 38037059 PMCID: PMC10691102 DOI: 10.1186/s12936-023-04803-z] [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: 09/27/2023] [Accepted: 11/23/2023] [Indexed: 12/02/2023] Open
Abstract
BACKGROUND Pregnant women have an increased risk of Plasmodium infections and disease. Malaria in pregnancy is a major public health problem in endemic areas. Assessment of the burden and risk factors of malaria in pregnancy across different malaria transmission settings is required to guide control strategies and for malaria elimination. Thus, the current study is generating such evidence from parturient women in northwest Ethiopia. METHODS A cross-sectional study was conducted among 526 pregnant women admitted to the delivery rooms of selected health facilities in Jawi district, northwest Ethiopia, between November 2021 and July 2022. Data on the socio-demographic, clinical, obstetric, and malaria prevention practices of pregnant women were collected using interviewer-administered questionnaires and from women's treatment cards. Malaria was diagnosed by light microscopy, rapid diagnostic test, and multiplex real-time polymerase chain reaction. Risk factors for malaria were evaluated using bivariable and multivariable logistic regression models. A P-value of < 0.05 was considered statistically significant. RESULTS Among the examined parturient women, 14.3% (95% CI 11.4-17.5%) had Plasmodium infections. The prevalence of peripheral, placental, and congenital malaria was 12.2% (95% CI 9.5-15.3%), 10.9% (95% CI 8.2-14.1%), and 3.7% (95% CI 2.3-6.1%), respectively. About 90.6% of peripheral and 92% of placental Plasmodium infections were asymptomatic. Plasmodium infection at parturiency was independently predicted by maternal illiteracy (AOR = 2.03, 95% CI 1.11-3.74), primigravidity (AOR = 1.88, 95% CI 1.01-3.49), lack of antenatal care follow-up (AOR = 2.28, 95% CI 1.04-5.03), and history of symptomatic malaria during pregnancy (AOR = 4.2, 95% CI 2.32-7.59). Moreover, the blood group O phenotype was significantly associated with placental malaria among the primiparae. CONCLUSIONS Overall, asymptomatic Plasmodium infections were prevalent among parturients in northwest Ethiopia. Maternal illiteracy, primigravidity, lack of antenatal care follow-up, and history of symptomatic malaria during pregnancy were the risk factors for malaria during parturiency. Thus, promotion of a healthy pregnancy through ANC follow-up, strengthening malaria prevention and control practices, and screening of malaria in asymptomatic pregnant women are suggested to reduce its burden in pregnancy.
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Affiliation(s)
- Zemenu Tamir
- Department of Medical Laboratory Sciences, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia.
- Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia.
| | - Abebe Animut
- Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia
| | - Sisay Dugassa
- Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia
| | - Mahlet Belachew
- Malaria and Neglected Tropical Diseases Research Team, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Adugna Abera
- Malaria and Neglected Tropical Diseases Research Team, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Aster Tsegaye
- Department of Medical Laboratory Sciences, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Berhanu Erko
- Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia
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3
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Shata MTM, Hetta HF, Sharma Y, Sherman KE. Viral hepatitis in pregnancy. J Viral Hepat 2022; 29:844-861. [PMID: 35748741 PMCID: PMC9541692 DOI: 10.1111/jvh.13725] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 12/17/2021] [Accepted: 06/13/2022] [Indexed: 12/09/2022]
Abstract
Viral hepatitis is caused by a heterogenous group of viral agents representing a wide range of phylogenetic groups. Many viruses can involve the liver and cause liver injury but only a subset are delineated as 'hepatitis viruses' based upon their primary site of replication and tropism for hepatocytes which make up the bulk of the liver cell population. Since their discovery, beginning with the agent that caused serum hepatitis in the 1960s, the alphabetic designations have been utilized. To date, we have five hepatitis viruses, A through E, though it is postulated that others may exist. This chapter will focus on those viruses. Note that hepatitis D is included as a subset of hepatitis B, as it cannot exist without concurrent hepatitis B infection. Pregnancy has the potential to affect all aspects of these viral agents due to the unique immunologic and physiologic changes that occur during and after the gestational period. In this review, we will discuss the most common viral hepatitis and their effects during pregnancy.
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Affiliation(s)
- Mohamed Tarek M. Shata
- Division of Digestive Disease, Department of Internal MedicineUniversity of CincinnatiCincinnatiOhioUSA
| | - Helal F. Hetta
- Division of Digestive Disease, Department of Internal MedicineUniversity of CincinnatiCincinnatiOhioUSA,Department of Medical Microbiology and Immunology, Faculty of MedicineAssiut UniversityAssiutEgypt
| | - Yeshika Sharma
- Division of Digestive Disease, Department of Internal MedicineUniversity of CincinnatiCincinnatiOhioUSA
| | - Kenneth E. Sherman
- Division of Digestive Disease, Department of Internal MedicineUniversity of CincinnatiCincinnatiOhioUSA
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4
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Geng J, Weitz AC, Dornevil K, Hendrich MP, Liu A. Kinetic and Spectroscopic Characterization of the Catalytic Ternary Complex of Tryptophan 2,3-Dioxygenase. Biochemistry 2020; 59:2813-2822. [PMID: 32659080 DOI: 10.1021/acs.biochem.0c00179] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The first step of the kynurenine pathway for l-tryptophan (l-Trp) degradation is catalyzed by heme-dependent dioxygenases, tryptophan 2,3-dioxygenase (TDO) and indoleamine 2,3-dioxygenase. In this work, we employed stopped-flow optical absorption spectroscopy to study the kinetic behavior of the Michaelis complex of Cupriavidus metallidurans TDO (cmTDO) to improve our understanding of oxygen activation and initial oxidation of l-Trp. On the basis of the stopped-flow results, rapid freeze-quench (RFQ) experiments were performed to capture and characterize this intermediate by Mössbauer spectroscopy. By incorporating the chlorite dismutase-chlorite system to produce high concentrations of solubilized O2, we were able to capture the Michaelis complex of cmTDO in a nearly quantitative yield. The RFQ-Mössbauer results confirmed the identity of the Michaelis complex as an O2-bound ferrous species. They revealed remarkable similarities between the electronic properties of the Michaelis complex and those of the O2 adduct of myoglobin. We also found that the decay of this reactive intermediate is the rate-limiting step of the catalytic reaction. An inverse α-secondary substrate kinetic isotope effect was observed with a kH/kD of 0.87 ± 0.03 when (indole-d5)-l-Trp was employed as the substrate. This work provides an important piece of spectroscopic evidence of the chemical identity of the Michaelis complex of bacterial TDO.
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Affiliation(s)
- Jiafeng Geng
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Andrew C Weitz
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Kednerlin Dornevil
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States.,Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Michael P Hendrich
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Aimin Liu
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States.,Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
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5
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Khodabandehloo M, Sharifi P. Seroprevalence of Cytomegalovirus Antibodies by Electrochemiluminescence Method in Young Women Referred to the Clinical Laboratory, Sanandaj, Iran. INTERNATIONAL JOURNAL OF EPIDEMIOLOGIC RESEARCH 2020. [DOI: 10.34172/ijer.2020.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background and aims: Maternal primary and recurrent infection of cytomegalovirus (CMV) may be transmitted to the fetus during pregnancy and may have complications such as death or growth, along with the development retardation of the fetus and infant. The aim of this study was to determine the prevalence of immunoglobulin G (IgG) and immunoglobulin M (IgM) antibodies against CMV in young women, Sanandaj, Iran. Methods: To this end, 90 women (15-40 years old) referring to a clinical laboratory were randomly selected and announced their informed consent to participate in this cross-sectional study. Demographic information and women’s data were collected, including pregnancy, history of abortion, and history of blood transfusion. Then, women’s sera were measured for CMV IgG and IgM antibodies using the electrochemiluminescence technique. Finally, the data were analyzed by SPSS statistical software. Results: The prevalence of IgG and IgM antibodies against CMV in women was 92.2% (95% CI = 86.5-97.8) and 0%, respectively. In addition, the average CMV IgG antibody level was about 137.52 ± 85.215 SD IU/mL. The results revealed a significant statistical association between IgG antibody and pregnancy (P value = 0.012) while there was no association between CMV IgG antibody and other demographic data. Conclusions: In general, high percentages of women had CMV IgG antibody whereas 7.8% of them were susceptible. They are expected to acquire CMV primary infection, and therefore, the screening of antibodies to CMV is suggested for prenatal care.
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Affiliation(s)
- Mazaher Khodabandehloo
- Ph.D, Cellular and Molecular Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Pezhman Sharifi
- M.Sc, Liver and Digestive Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran
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6
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Zhao Y, Zheng Q, Jin L. The Role of B7 Family Molecules in Maternal-Fetal Immunity. Front Immunol 2020; 11:458. [PMID: 32265918 PMCID: PMC7105612 DOI: 10.3389/fimmu.2020.00458] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 02/27/2020] [Indexed: 01/08/2023] Open
Abstract
Pregnancy is a complex but well-arranged process, and a healthy fetus requires immune privilege and surveillance in the presence of paternally derived antigens. Maternal and fetal cells interact at the maternal–fetal interface. The upregulation and downregulation of maternal immunity executed by the leukocyte population predominantly depend on the activity of decidual natural killer cells and trophoblasts and are further modulated by a series of duplex signals. The B7 family, which consists of B7-1, B7-2, B7-H1, B7-DC, B7-H2, B7-H3, B7-H4, B7-H5, BTNL2, B7-H6, and B7-H7, is one of the most characterized and widely distributed signaling molecule superfamilies and conducts both stimulatory and inhibitory signals through separate interactions. In particular, the roles of B7-1, B7-2, B7-H1, and their corresponding receptors in the progression of normal pregnancy and some pregnancy complications have been extensively studied. Together with the TCR–MHC complex, B7 and its receptors play a critical role in cell proliferation and cytokine secretion. Depending on this ligand–receptor crosstalk, the balance between the tolerance and rejection of the fetus is perfectly maintained. This review aims to provide an overview of the current knowledge of the B7 family and its functions in regulating maternal–fetal immunity through individual interactions.
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Affiliation(s)
- Yongbo Zhao
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - Qingliang Zheng
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
| | - Liping Jin
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Tongji University School of Medicine, Shanghai, China
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7
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Kumar S, Waldo JP, Jaipuri FA, Marcinowicz A, Van Allen C, Adams J, Kesharwani T, Zhang X, Metz R, Oh AJ, Harris SF, Mautino MR. Discovery of Clinical Candidate (1 R,4 r)-4-(( R)-2-(( S)-6-Fluoro-5 H-imidazo[5,1- a]isoindol-5-yl)-1-hydroxyethyl)cyclohexan-1-ol (Navoximod), a Potent and Selective Inhibitor of Indoleamine 2,3-Dioxygenase 1. J Med Chem 2019; 62:6705-6733. [PMID: 31264862 DOI: 10.1021/acs.jmedchem.9b00662] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A novel class of 5-substituted 5H-imidazo[5,1-a]isoindoles are described as potent inhibitors of indoleamine 2,3-dioxygenase 1 (IDO1). A structure-based drug design approach was used to elaborate the 5H-imidazo[5,1-a]isoindole core and to improve potency and pharmacological properties. Suitably placed hydrophobic and polar functional groups in the lead molecule allowed improvement of IDO1 inhibitory activity while minimizing off-target liabilities. Structure-activity relationship studies focused on optimizing IDO1 inhibition potency and a pharmacokinetic profile amenable to oral dosing while controlling CYP450 and hERG inhibitory properties.
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Affiliation(s)
- Sanjeev Kumar
- NewLink Genetics Corporation , Ames , Iowa 50010 , United States
| | - Jesse P Waldo
- NewLink Genetics Corporation , Ames , Iowa 50010 , United States
| | - Firoz A Jaipuri
- NewLink Genetics Corporation , Ames , Iowa 50010 , United States
| | | | | | - James Adams
- NewLink Genetics Corporation , Ames , Iowa 50010 , United States
| | - Tanay Kesharwani
- NewLink Genetics Corporation , Ames , Iowa 50010 , United States
| | - Xiaoxia Zhang
- NewLink Genetics Corporation , Ames , Iowa 50010 , United States
| | - Richard Metz
- NewLink Genetics Corporation , Ames , Iowa 50010 , United States
| | - Angela J Oh
- Structural Biology , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Seth F Harris
- Structural Biology , Genentech, Inc. , 1 DNA Way , South San Francisco , California 94080 , United States
| | - Mario R Mautino
- NewLink Genetics Corporation , Ames , Iowa 50010 , United States
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8
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Wang X, Lee CL, Li RHW, Vijayan M, Duan YG, Yeung WSB, Zhang Y, Chiu PCN. Alteration of the immune cell profiles in the pathophysiology of tubal ectopic pregnancy. Am J Reprod Immunol 2019; 81:e13093. [PMID: 30672642 DOI: 10.1111/aji.13093] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/14/2019] [Accepted: 01/14/2019] [Indexed: 12/31/2022] Open
Abstract
Tubal ectopic pregnancy (TEP) refers to implantation of conceptus in the fallopian tube. It makes up over 98% of ectopic pregnancy (EP), which is the leading cause of maternal morbidity and mortality in the first trimester of pregnancy. Immune cells at the maternal-fetal interface play important roles in the process of embryo implantation, stroma decidualization, and early placental development. Alterations in the composition, phenotype, and activity of the immune cells in the fallopian tubes contribute toward the onset of TEP. In this review, we compare the leukocytic proportions in decidua of normal pregnancy, and in decidua and fallopian tubes of TEP. The possible functions of these immune cells in the pathophysiology of TEP are also discussed.
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Affiliation(s)
- Xia Wang
- Department of Obstetrics & Gynaecology, The University of Hong Kong, Hong Kong, SAR, China
| | - Cheuk-Lun Lee
- Department of Obstetrics & Gynaecology, The University of Hong Kong, Hong Kong, SAR, China.,Department of Obstetrics and Gynaecology, Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Raymond H W Li
- Department of Obstetrics & Gynaecology, The University of Hong Kong, Hong Kong, SAR, China.,Department of Obstetrics and Gynaecology, Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Madhavi Vijayan
- Department of Obstetrics & Gynaecology, The University of Hong Kong, Hong Kong, SAR, China
| | - Yong-Gang Duan
- Department of Obstetrics and Gynaecology, Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - William S B Yeung
- Department of Obstetrics and Gynaecology, Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Yuanzhen Zhang
- Department of Obstetrics and Gynecology, Reproductive Medicine Center, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Philip C N Chiu
- Department of Obstetrics & Gynaecology, The University of Hong Kong, Hong Kong, SAR, China.,Department of Obstetrics and Gynaecology, Shenzhen Key Laboratory of Fertility Regulation, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
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9
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Cismaru CA, Pop L, Berindan-Neagoe I. Incognito: Are Microchimeric Fetal Stem Cells that Cross Placental Barrier Real Emissaries of Peace? Stem Cell Rev Rep 2018; 14:632-641. [PMID: 29948753 DOI: 10.1007/s12015-018-9834-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Chimerism occurs naturaly throughout gestation and can also occur as a consequence of transfusion and transplantation therapy. It consists of the acquisition and long-term persistence of a genetically distinct population of allogenic cells inside another organism. Previous reports have suggested that feto-maternal microchimerism could exert a beneficial effect on the treatment of hematological and solid tumors in patients treated by PBSCT. In this review we report the mechanism of transplacental fetal stem cell trafficking during pregnancy and the effect of their long-term persistence on autoimmunity, GVHD, PBSCT, cancer and stem cell treatment.
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Affiliation(s)
- Cosmin Andrei Cismaru
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, "Iuliu Hatieganu" University of Medicine and Pharmacy, 23 Gh. Marinescu street, 400337, Cluj-Napoca, Romania.
| | - Laura Pop
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, "Iuliu Hatieganu" University of Medicine and Pharmacy, 23 Gh. Marinescu street, 400337, Cluj-Napoca, Romania
| | - Ioana Berindan-Neagoe
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, "Iuliu Hatieganu" University of Medicine and Pharmacy, 23 Gh. Marinescu street, 400337, Cluj-Napoca, Romania
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10
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Sadighi-Moghaddam B, Salek Farrokhi A, Namdar Ahmadabad H, Barati M, Moazzeni SM. Mesenchymal Stem Cell Therapy Prevents Abortion in CBA/J × DBA/2 Mating. Reprod Sci 2017; 25:1261-1269. [PMID: 29187052 DOI: 10.1177/1933719117737848] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Immunological disorders are among the main causes of recurrent spontaneous abortions (RSAs). Mesenchymal stem cells (MSCs) have been shown to modulate various aspects of immune responses. It seems that MSCs may improve the immunological conditions in immune-mediated RSA. The aim of this study is the reduction of resorption in RSA mouse model through MSCs therapy. The adipose-derived MSCs were administered intraperitoneal to pregnant CBA/J mice on day 4.5 of gestation in abortion-prone matting. On day 13.5 of pregnancy, abortion rates were calculated and transforming growth factor-β (TGF-β), interleukin 10 (IL-10), interferon γ (IFN-γ), and tumor necrosis factor α (TNF-α) gene expression in deciduas were evaluated by real-time polymerase chain reaction (PCR). The level of TGF-β in serum was also determined by enzyme linked immunosorbent assay (ELISA) method. The obtained results showed that MSCs therapy could reduce the abortion rate significantly in test group compared to controls. MSCs therapy also caused a significant upregulation of TGF-β and IL-10 and downregulation of IFN-γ and TNF-α genes expression in deciduas. However, the levels of TGF-β didn't change in mice sera. Due to the significant decrease in abortion rate, we concluded that MSCs therapy could modulate the immune responses in fetomaternal interface and protect fetus from undesirable immune responses. So, these cells might be considered as a new therapeutic for spontaneous pregnancy loss. The local upregulation of TGF-β and IL-10 and downregulation of IFN-γ and TNF-α gene expression in decidua could be considered as one possible mechanism of immune regulation, which could protect the fetus.
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Affiliation(s)
- Bizhan Sadighi-Moghaddam
- 1 Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.,2 Department of Immunology, Semnan University of Medical Sciences, Semnan, Iran
| | - Amir Salek Farrokhi
- 1 Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Hassan Namdar Ahmadabad
- 3 Department of Pathobiology and Medical Laboratory Science, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | - Mehdi Barati
- 2 Department of Immunology, Semnan University of Medical Sciences, Semnan, Iran
| | - Seyed Mohammad Moazzeni
- 1 Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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11
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Sherer ML, Posillico CK, Schwarz JM. An examination of changes in maternal neuroimmune function during pregnancy and the postpartum period. Brain Behav Immun 2017; 66:201-209. [PMID: 28669797 PMCID: PMC6348474 DOI: 10.1016/j.bbi.2017.06.016] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 06/28/2017] [Accepted: 06/29/2017] [Indexed: 12/28/2022] Open
Abstract
There is strong evidence that the immune system changes dramatically during pregnancy in order to prevent the developing fetus from being "attacked" by the maternal immune system. Due to these alterations in peripheral immune function, many women that suffer from autoimmune disorders actually find significant relief from their symptoms throughout pregnancy; however, these changes can also leave the mother more susceptible to infections that would otherwise be mitigated by the inflammatory response (Robinson and Klein, 2012). Only one other study has looked at changes in microglial number and morphology during pregnancy and the postpartum period (Haim et al., 2016), but no one has yet examined the neuroimmune response following an immune challenge during this time. Therefore, in this study, we investigated the impact of an immune challenge during various time-points throughout pregnancy and the postpartum period on the expression of immune molecules in the brain of the mother and fetus. Our results indicate that similar to the peripheral immune suppression measured during pregnancy, we also see significant suppression of the immune response in the maternal brain, particularly during late gestation. In contrast to the peripheral immune system, immune modulation in the maternal brain extends moderately into the postpartum period. Additionally, we found that the fetal immune response in the brain and placenta is also suppressed just before parturition, suggesting that cytokine production in the fetus and placenta are mirroring the peripheral cytokine response of the mother.
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Affiliation(s)
- Morgan L Sherer
- University of Delaware, Department of Psychological and Brain Sciences, 108 Wolf Hall, Newark, DE 19716, United States.
| | - Caitlin K Posillico
- University of Delaware, Department of Psychological and Brain Sciences, 108 Wolf Hall, Newark, DE 19716, United States
| | - Jaclyn M Schwarz
- University of Delaware, Department of Psychological and Brain Sciences, 108 Wolf Hall, Newark, DE 19716, United States
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12
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Cushen SC, Goulopoulou S. New Models of Pregnancy-Associated Hypertension. Am J Hypertens 2017; 30:1053-1062. [PMID: 28472224 DOI: 10.1093/ajh/hpx063] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Accepted: 03/22/2017] [Indexed: 12/26/2022] Open
Abstract
Pregnancy-associated hypertensive disorders are leading causes of maternal and fetal mortality. These include: pre-pregnancy hypertension that persists throughout gestation (chronic/preexisting hypertension), de novo hypertension that is diagnosed after 20 weeks of gestation and resolves after birth (gestational hypertension), de novo hypertension that is diagnosed after 20 weeks of gestation with or without proteinuria and end-organ damage (preeclampsia and eclampsia), and chronic hypertension with superimposed preeclampsia during gestation. Preeclampsia is the most severe form of these disorders. Animal models have been developed by employing surgical, genetic, and pharmacological approaches in order to recapitulate the maternal symptoms of preeclampsia and other hypertensive disorders of pregnancy. The scope of this brief review is to present an up-to-date synthesis of our knowledge of experimental models of pregnancy-associated hypertensive disorders. Novel models, defined in this review as characterized within the last 5 years, will be described and critically discussed. In this review, we will also discuss established experimental models of pregnancy-associated hypertensive disorders in the context of their contribution to new advances in our knowledge about the pathophysiology of these disorders and potential therapeutics. Emphasis will be placed on animal models of preeclampsia; however, models of other hypertensive disorders in pregnancy will also be reviewed.
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Affiliation(s)
- Spencer C Cushen
- Institute for Cardiovascular and Metabolic Diseases, University of North Texas Health Science Center, Fort Worth, Texas, USA
| | - Styliani Goulopoulou
- Institute for Cardiovascular and Metabolic Diseases, University of North Texas Health Science Center, Fort Worth, Texas, USA
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Murthi P, Wallace EM, Walker DW. Altered placental tryptophan metabolic pathway in human fetal growth restriction. Placenta 2017; 52:62-70. [DOI: 10.1016/j.placenta.2017.02.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 01/24/2017] [Accepted: 02/10/2017] [Indexed: 01/19/2023]
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Bai M, Liu H, Xu K, Oso AO, Wu X, Liu G, Tossou MCB, Al-Dhabi NA, Duraipandiyan V, Xi Q, Yin Y. A review of the immunomodulatory role of dietary tryptophan in livestock and poultry. Amino Acids 2016; 49:67-74. [PMID: 27778165 DOI: 10.1007/s00726-016-2351-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Accepted: 10/13/2016] [Indexed: 10/20/2022]
Abstract
Tryptophan, a nutritionally essential amino acid, is active in the regulation of immune responses in animals. The products of tryptophan metabolism, such as indoleamine 2,3-dioxygenase, kynurenine, quinolinic acid, and melatonin, may improve immunity in an organism and induce anti-inflammatory responses. The immune tolerance processes mediated by tryptophan metabolites are not well understood. Recent studies have reported that the enzymes that break down tryptophan through the kynurenine metabolic pathway are found in numerous cell types, including immunocytes. Moreover, some tryptophan metabolites have been shown to play a role in the inhibition of T lymphocyte proliferation, elevation of immunoglobulin levels in the blood, and promotion of antigen-presenting organization in tissues. This review summarizes the effects and mechanisms of tryptophan and metabolites in immune functions in livestock and poultry. It also highlights the areas in which our understanding of the role(s) of tryptophan is incomplete and suggests possible future research that might prove of benefit to livestock and poultry producers.
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Affiliation(s)
- Miaomiao Bai
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, 410125, Hunan, China.,College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Hongnan Liu
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, 410125, Hunan, China.
| | - Kang Xu
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, 410125, Hunan, China
| | - Abimbola Oladele Oso
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, 410125, Hunan, China.,Department of Animal Nutrition, College of Animal Science and Livestock Production, Federal University of Agriculture, Abeokuta, PMB 2240, Nigeria
| | - Xin Wu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330029, Jiangxi, China.,Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, 410125, Hunan, China
| | - Gang Liu
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, 410125, Hunan, China
| | - Myrlene Carine B Tossou
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, 410125, Hunan, China
| | - Naif Abdullah Al-Dhabi
- Addiriyah Chair for Environmental Studies, Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Veeramuthu Duraipandiyan
- Addiriyah Chair for Environmental Studies, Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Qianyun Xi
- College of Animal Science, South China Agricultural University, Guangzhou, 510642, China
| | - Yinlong Yin
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330029, Jiangxi, China. .,Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Hunan Provincial Engineering Research Center for Healthy Livestock and Poultry Production, Changsha, 410125, Hunan, China. .,College of Animal Science, South China Agricultural University, Guangzhou, 510642, China.
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Chaouat G. Reconsidering the Medawar paradigm placental viviparity existed for eons, even in vertebrates; without a “problem”: Why are Tregs important for preeclampsia in great apes? J Reprod Immunol 2016; 114:48-57. [DOI: 10.1016/j.jri.2015.09.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 09/11/2015] [Indexed: 12/31/2022]
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Santillan MK, Pelham CJ, Ketsawatsomkron P, Santillan DA, Davis DR, Devor EJ, Gibson‐Corley KN, Scroggins SM, Grobe JL, Yang B, Hunter SK, Sigmund CD. Pregnant mice lacking indoleamine 2,3-dioxygenase exhibit preeclampsia phenotypes. Physiol Rep 2015; 3:e12257. [PMID: 25602015 PMCID: PMC4387753 DOI: 10.14814/phy2.12257] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 11/30/2014] [Accepted: 12/03/2014] [Indexed: 11/24/2022] Open
Abstract
Preeclampsia is a cardiovascular disorder of late pregnancy that is, commonly characterized by hypertension, renal structural damage and dysfunction, and fetal growth restriction. Prevailing etiologic models of this disorder include T-cell dysfunction as an initiating cause of preeclampsia. Indoleamine 2,3-dioxygenase (IDO), an enzyme that mediates the conversion of tryptophan to kynurenine, has been linked to preeclampsia in humans, and is known to regulate T-cell activity and an endothelial-derived relaxing factor. To test the hypothesis that IDO is causally involved in the pathogenesis of preeclampsia, mice deficient for IDO (IDO-KO) were generated on a C57BL/6 background. IDO-KO and wild-type C57BL/6 mice were bred, and preeclampsia phenotypes were evaluated during pregnancy. Pregnant IDO-KO mice exhibited pathognomonic renal glomerular endotheliosis, proteinuria, pregnancy-specific endothelial dysfunction, intrauterine growth restriction, and mildly elevated blood pressure compared to wild-type mice. Together these findings highlight an important role for IDO in the generation of phenotypes typical of preeclampsia. Loss of IDO function may represent a risk factor for the development of preeclampsia. By extension, increased IDO activity, reductions in IDO reactants, or increases in IDO products may represent novel therapeutic approaches for this disorder.
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Affiliation(s)
- Mark K. Santillan
- Department of Obstetrics & Gynecology, University of Iowa, Iowa City, Iowa
- The Center for Hypertension Research, University of Iowa, Iowa City, Iowa
| | | | | | - Donna A. Santillan
- Department of Obstetrics & Gynecology, University of Iowa, Iowa City, Iowa
- The Center for Hypertension Research, University of Iowa, Iowa City, Iowa
| | | | - Eric J. Devor
- Department of Obstetrics & Gynecology, University of Iowa, Iowa City, Iowa
| | | | | | - Justin L. Grobe
- The Center for Hypertension Research, University of Iowa, Iowa City, Iowa
- Department of Pharmacology, University of Iowa, Iowa City, Iowa
| | - Baoli Yang
- Department of Obstetrics & Gynecology, University of Iowa, Iowa City, Iowa
| | - Steven K. Hunter
- Department of Obstetrics & Gynecology, University of Iowa, Iowa City, Iowa
| | - Curt D. Sigmund
- The Center for Hypertension Research, University of Iowa, Iowa City, Iowa
- Department of Pharmacology, University of Iowa, Iowa City, Iowa
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Mpairwe H, Tweyongyere R, Elliott A. Pregnancy and helminth infections. Parasite Immunol 2014; 36:328-37. [PMID: 24471654 PMCID: PMC4260141 DOI: 10.1111/pim.12101] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 01/22/2014] [Indexed: 01/13/2023]
Abstract
It has been proposed that helminth infection may be particularly detrimental during pregnancy, through adverse effects on maternal anaemia and on birth outcomes, and that anthelminthic treatment during pregnancy will therefore be particularly beneficial. However, the few treatment trials that have been conducted have given, but little support to this notion and further trials in settings of nutritional stress are needed. It has also been proposed that prenatal exposure to helminth infection has an important effect on the development of the foetal immune response. There is evidence that this may impact, long-term, upon responses to helminth and nonhelminth antigens, and to allergens. Exposure to helminths in utero may also have nonspecific effects that may modify the offspring's susceptibility to diseases mediated by inflammation, including metabolic disorders. The mechanisms of such effects are not known, but they deserve to be explored as current epidemiological findings suggest the possibility of primary prevention for inflammatory conditions such as allergy, through intervention during pregnancy.
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Affiliation(s)
- H Mpairwe
- MRC/UVRI Uganda Research Unit on AIDS, Entebbe, Uganda
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18
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The immunology of pregnancy: Regulatory T cells control maternal immune tolerance toward the fetus. Immunol Lett 2014; 162:41-8. [DOI: 10.1016/j.imlet.2014.06.013] [Citation(s) in RCA: 168] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 06/13/2014] [Accepted: 06/24/2014] [Indexed: 01/20/2023]
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Liu Y, Zhao M, Xu X, Liu X, Zhang H, Jiang Y, Zhang L, Hu X. Adoptive Transfer of Treg Cells Counters Adverse Effects of Toxoplasma gondii Infection on Pregnancy. J Infect Dis 2014; 210:1435-43. [DOI: 10.1093/infdis/jiu265] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Geng J, Liu A. Heme-dependent dioxygenases in tryptophan oxidation. Arch Biochem Biophys 2013; 544:18-26. [PMID: 24295960 DOI: 10.1016/j.abb.2013.11.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 11/19/2013] [Accepted: 11/20/2013] [Indexed: 12/29/2022]
Abstract
L-Tryptophan is an essential amino acid for mammals. It is utilized not only for protein synthesis but also for the biosynthesis of serotonin and melatonin by the serotonin pathway as well as nicotinamide adenine dinucleotide by the kynurenine pathway. Although the kynurenine pathway is responsible for the catabolism of over 90% of l-tryptophan in the mammalian intracellular and extracellular pools, the scientific field was dominated in the last century by studies of the serotonin pathway, due to the physiological significance of the latter's catabolic intermediates and products. However, in the past decade, the focus gradually reversed as the link between the kynurenine pathway and various neurodegenerative disorders and immune diseases is increasingly highlighted. Notably, the first step of this pathway, which is catalyzed by heme-dependent dioxygenases, has been proven to be a potential target for immune regulation and cancer treatment. A thorough understanding of the intriguing chemistry of the heme-dependent dioxygenases may yield insight for the drug discovery of these prevalent illnesses. In this review, we survey enzymatic and mechanistic studies, initially started by Kotake and Masayama over 70 years ago, at the molecular level on the heme-dependent tryptophan dioxygenation reactions.
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Affiliation(s)
- Jiafeng Geng
- Department of Chemistry, Georgia State University, 50 Decatur Street SE, Atlanta, GA 30303, United States
| | - Aimin Liu
- Department of Chemistry, Georgia State University, 50 Decatur Street SE, Atlanta, GA 30303, United States.
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Wen Q, Zhou L, Chen H, Zhang Y. N-(3', 4'-dimethoxycinnamonyl) anthranilic acid alleviated experimental colitis by inhibiting autoimmune response and inducing CD4+ CD25+ regulatory T cells production. J Gastroenterol Hepatol 2013; 28:1330-8. [PMID: 23663055 DOI: 10.1111/jgh.12266] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/15/2013] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND AIM Crohn's disease treatments available today are not quite satisfactory. N-(3', 4'-dimethoxycinnamonyl) anthranilic acid (3, 4-DAA) has been proved to be effective in many autoimmune diseases. Therefore, we investigated the immunologic function of 3, 4-DAA on trinitrobenzene sulfonic acid (TNBS) colitis and human Crohn's disease. METHODS Mice with TNBS-induced colitis were treated with 3, 4-DAA or 1-methyl-tryptophan (1-MT). Colitis severity was assessed with clinical and histological scores. Cell proliferation, cytokine expression, and the percentage of CD4(+) CD25(+) T cells were measured in both mice and human samples. RESULTS In mice treated with 3, 4-DAA, the clinical and histological scores were decreased (P < 0.05); the proliferation of mesenteric lymph nodes (MLNs) cells and lamina propria mononuclear cells (LPMCs) were inhibited (P < 0.05); Th1 cytokine expressions were decreased (P < 0.05), and Th2 cytokine levels were increased (P < 0.05). 3, 4-DAA also induced CD4(+) CD25(+) T cells expression (5.88 ± 2.1 vs 11.03 ± 2.93, P < 0.05) in mice MLNs. Transfer of these cells into TNBS colitis mice resulted in the reduction of the disease activity index (DAI) and histological scores. In LPMCs isolated from human Crohn's disease, 3, 4-DAA had the same effect. It can inhibit the cell proliferation, decrease Th1 cytokine expressions (P < 0.05), and increase Th2 cytokine levels (P < 0.05). The percentage of CD4(+) CD25(+) T cells were also increased (1.60 ± 0.14 vs 2.45 ± 0.50, P < 0.05). 1-MT treatment led to opposite outcomes. CONCLUSION 3, 4-DAA can alleviate the severity of colitis through inhibiting Th1 cells response, promoting Th2 cytokines expression and inducing CD4(+) CD25(+) T cells expression.
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Affiliation(s)
- Quan Wen
- Department of Gastroenterology, West China Hospital of Sichuan University, Chengdu, Sichuan, China
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Ibana JA, Myers L, Porretta C, Lewis M, Taylor SN, Martin DH, Quayle AJ. The major CD8 T cell effector memory subset in the normal and Chlamydia trachomatis-infected human endocervix is low in perforin. BMC Immunol 2012; 13:66. [PMID: 23216954 PMCID: PMC3538661 DOI: 10.1186/1471-2172-13-66] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Accepted: 12/03/2012] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND The local tissue microenvironment plays an important role in the induction, homing, maintenance and development of effector functions of T cells. Thus, site-specific differences in phenotypes of mucosal and systemic T cell populations have been observed. Chlamydia trachomatis most commonly infects the endocervix in women, yet little is known about Chlamydia-specific effector T cell immunity at this unique mucosal site. Our previous flow-cytometry-based study of cervical-cytobrush retrieved cells indicated that CD8 T cells are significantly increased in the C. trachomatis-infected human endocervix. The cytolytic function of CD8 T cells is important in the protective immunity against many intracellular pathogens, and requires the cytolytic granule perforin to facilitate the entry of other molecules that mediate the lysis of target cells. Determination of perforin expression of the CD8 T cell population in the endocervix would therefore provide insights on the granule-mediated cytolytic potential of these cells at this site. RESULTS Our histological data revealed that C. trachomatis-infected tissues have significantly higher numbers of CD3 and CD8 T cells compared to non-infected tissues (p<0.01), and that the majority of CD8+ cells do not express perforin in situ. A subsequent flow cytometric analysis of paired blood and endocervix-derived cells (n=16) revealed that while all the CD8 T cell subsets: naïve, effector memory (TEM), central memory (TCM) and terminally differentiated effector memory (TEMRA) can be found in the blood, the endocervix is populated mainly by the TEM CD8 T cell subset. Our data also showed that perforin expression in the TEM population is significantly lower in the endocervix than in the blood of C. trachomatis positive women (n=15; p<0.0001), as well as in C. trachomatis-negative individuals (n=6; p<0.05). Interestingly, our in vitro co-culture study suggests that the exposure of HeLa 229 cervical epithelial cells to IFN gamma could potentially induce a decrease in perforin content in CD8 TEM cells in the same microenvironment. CONCLUSIONS The low perforin content of CD8 TEM cells in the endocervix, the local site of C. trachomatis infection in women, may reflect the unique immunological environment that balances immune protection against sexually transmitted infections and immune- tolerance to support conception.
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Affiliation(s)
- Joyce A Ibana
- Microbiology, Immunology and Parasitology Department, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA
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Barnea ER, Kirk D, Ramu S, Rivnay B, Roussev R, Paidas MJ. PreImplantation Factor (PIF) orchestrates systemic antiinflammatory response by immune cells: effect on peripheral blood mononuclear cells. Am J Obstet Gynecol 2012; 207:313.e1-11. [PMID: 23021695 DOI: 10.1016/j.ajog.2012.07.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 07/03/2012] [Accepted: 07/11/2012] [Indexed: 01/15/2023]
Abstract
OBJECTIVE Embryo-derived PreImplantation Factor (PIF) is essential for pregnancy immune modulation and synthetic PIF (sPIF), reverses neuroinflammation, and prevents diabetes mellitus through its immune modulatory properties. Herein, we explore sPIF's systemic effects on peripheral blood mononuclear cells (PBMCs). STUDY DESIGN sPIF's effects on PBMCs and subset populations from nonpregnant patients (n = 7) and male patients were evaluated by the assessment of binding characteristics, mixed lymphocyte reaction, proliferation, cytokine secretion, and associated gene expression. Data analysis was by analysis of variance (P < .05). RESULTS Fluorescein isothiocyanate-sPIF bound all myelomonocytic cells; binding was 30-fold up-regulated in mitogen-activated T and B cells (P < .05). sPIF decreased mixed lymphocyte reaction by 70% and blocked anti-CD3 antibody stimulated-PBMC proliferation by approximately 80% (P < .05). In naïve PBMCs, sPIF reduced interleukin (IL)-10 and -2; in activated PBMCs, sPIF increased IL-4, -5, -10, and -2, tumor necrosis factor-α, interferon-γ, and granulocyte-macrophage colony-stimulating factor (P < .05). CONCLUSION Physiologic concentrations of PIF exert potent systemic antiinflammatory effects on nonpregnant activated immune cells.
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Affiliation(s)
- Eytan R Barnea
- Society for the Investigation of Early Pregnancy and BioIncept, LLC, Cherry Hill, NJ, USA.
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Tadokoro CE. The Delicate Balance Between Inflammation, Conception and Pregnancy. Am J Reprod Immunol 2012; 68:363-5. [DOI: 10.1111/j.1600-0897.2012.01162.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Affiliation(s)
- Carlos E. Tadokoro
- Laboratory of Immune Regulation; Instituto Gulbenkian de Ciência; Oeiras; Portugal
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Woudwyk MA, Monteavaro CE, Jensen F, Soto P, Barbeito CG, Zenclussen AC. Study of the uterine local immune response in a murine model of embryonic death due to Tritrichomonas foetus. Am J Reprod Immunol 2012; 68:128-37. [PMID: 22672658 DOI: 10.1111/j.1600-0897.2012.01159.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 04/23/2012] [Indexed: 12/31/2022] Open
Abstract
PROBLEM Bovine tritrichomonosis is a sexually transmitted disease caused by Tritrichomonas foetus, characterized by conceptus loss. We developed a mouse model of tritrichomonosis to study the mechanisms involved in the embryonic death. We hypothesized that embryonic death may be due to an exacerbated maternal response to the pathogen that then affects embryo development. METHOD OF STUDY We infected BALB/c mice with Tritrichomonas foetus and paired them after confirming active infection. We studied the expression of pro- and anti-inflammatory cytokines, markers for T regulatory and T helper 17 cells as well as haem-oxygenase-1 expression in uterine tissue by real-time RT-PCR. RESULTS As expected, TNF-α was augmented in infected animals. IL-10 and IL-4 were also up-regulated. Treg-associated genes were higher expressed in uteri of infected group. In mice that have lost their conceptus after the infection, haem-oxygenase-1 (HO-1) mRNA levels were strongly decreased, while RORγt mRNA, a reliable marker for Th17, was augmented in uterus. CONCLUSION A T effector response of type 1 and 17 may be involved in tritrichomonosis-related embryonic death. This alters protective mechanisms as HO-1. Increased regulatory T cells may facilitate embryonic death by promoting the persistence of infection.
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Affiliation(s)
- Mariana A Woudwyk
- Laboratory of Histology and Embryology, Faculty of Veterinary Sciences, National University of La Plata, La Plata, Buenos Aires, Argentina
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Jaiswal MK, Mallers TM, Kwong C, Chaouat G, Gilman-Sachs A, Beaman KD. Abortion-prone mating influences alteration of systemic a2 vacuolar ATPase expression in spleen and blood immune cells. Am J Reprod Immunol 2012; 67:421-33. [PMID: 22221850 DOI: 10.1111/j.1600-0897.2011.01098.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Accepted: 12/08/2011] [Indexed: 11/25/2022] Open
Abstract
PROBLEM a2 isoform of vacuolar ATPase (Atp6v0a2) is important for maintaining the delicate immunological balance required for successful pregnancy. The objective of this investigation is to study the dynamic changes in spleen and blood that appear during spontaneous abortion in mice. METHOD OF STUDY Atp6v0a2 was measured in multiple immune cell populations from spleen and blood recovered from non-abortion-prone and abortion-prone mating combinations. RESULTS Atp6v0a2 expression was significantly lower (P ≤ 0.01) in the spleen recovered from abortion-prone ♀CBA × ♂DBA mating on days 12 and 16 of pregnancy when compared to non-abortion-prone ♀BALB/c × ♂BALB/c and ♀CBA × ♂BALB/c matings. Flow cytometric studies showed that significantly decreased expression of Atp6v0a2 in splenic CD4(+), CD8(+), CD19(+), and CD14(+) cells directly correlated with the high percentages of fetal resorption observed in abortion-prone mating on days 12 and 16 of pregnancy. In blood, CD4(+), CD8(+), and CD19(+) cells had a significantly reduced expression of Atp6v0a2 in abortion-prone mating compared to the non-abortion-prone mating combinations only on day 12. CONCLUSION This deceased expression of Atp6v0a2 in the various immune cell populations of the spleen and blood suggests that the maternal environment is not supportive to fetus and leads to poor pregnancy outcome in the abortion-prone mating model.
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Affiliation(s)
- Mukesh K Jaiswal
- Department of Microbiology and Immunology, Rosalind Franklin University of Medicine and Science, North Chicago, IL, USA
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A genomic and proteomic investigation of the impact of preimplantation factor on human decidual cells. Am J Obstet Gynecol 2010; 202:459.e1-8. [PMID: 20452489 DOI: 10.1016/j.ajog.2010.03.024] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2009] [Revised: 02/16/2010] [Accepted: 03/11/2010] [Indexed: 11/24/2022]
Abstract
OBJECTIVE Preimplantation factor (PIF) is a novel, 15 amino acid peptide, secreted by viable embryos. This study aims to elucidate PIF's effects in human endometrial stromal cells (HESC) decidualized by estrogen and progestin, which mimics the preimplantation milieu, and in first-trimester decidua cultures (FTDC). STUDY DESIGN HESC or FTDC were incubated with 100 nmol/L synthetic PIF or vehicle control. Global gene expression was analyzed using microarray and pathway analysis. Proteins were analyzed using quantitative mass spectrometry, and PIF binding by protein array. RESULTS Gene and proteomic analysis demonstrate that PIF affects immune, adhesion, and apoptotic pathways. Significant up-regulation in HESC (fold change) include: nuclear factor-k-beta activation via interleukin-1 receptor-associated kinase binding protein 1 (53); Toll-like receptor 5 (9); FK506 binding protein 15, 133kDa protein (2.3); and Down syndrome cell adhesion molecule like 1 (16). B-cell lymphoma protein 2 was down-regulated in HESC (21.1) and FTDC (27.1). Protein array demonstrates PIF interaction with intracellular targets insulin-degrading enzyme and beta-K+ channels. CONCLUSION PIF displays essential multitargeted effects, of regulating immunity, promoting embryo-decidual adhesion, and regulating adaptive apoptotic processes.
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Chakraborty R, Pulendran B. Restraining order for dendritic cells: all quiet on the fetal front. J Clin Invest 2009; 119:1854-7. [PMID: 19603541 DOI: 10.1172/jci39946] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
The paradoxical ability to launch effective immunity against pathogens while avoiding the horror autotoxicus of autoimmunity is one of the most remarkable features of the mammalian immune system. This assumes a particular evolutionary significance at the maternal/fetal interface, where avoidance of immune reactivity to the fetus is vital to the propagation of the species itself. Several mechanisms of suppressing maternal immunity against the fetus have been described. The article by Collins et al. in this issue of the JCI describes a novel mechanism of avoiding immune surveillance in which the migratory capacity of dendritic cells at the maternal/fetal interface is restrained (see the related article beginning on page 2062).
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Affiliation(s)
- Rana Chakraborty
- Division of Pediatric Infectious Diseases, Emory University School of Medicine, Atlanta, Georgia, USA
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29
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Jeddi-Tehrani M, Abbasi N, Dokouhaki P, Ghasemi J, Rezania S, Ostadkarampour M, Rabbani H, Akhondi M, Tahmasebi Fard Z, Zarnani A. Indoleamine 2,3-dioxygenase is expressed in the endometrium of cycling mice throughout the oestrous cycle. J Reprod Immunol 2009; 80:41-8. [DOI: 10.1016/j.jri.2009.02.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2008] [Revised: 12/04/2008] [Accepted: 02/02/2009] [Indexed: 11/30/2022]
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30
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Sekigawa T, Tajima A, Hasegawa T, Hasegawa Y, Inoue H, Sano Y, Matsune S, Kurono Y, Inoue I. Gene-expression profiles in human nasal polyp tissues and identification of genetic susceptibility in aspirin-intolerant asthma. Clin Exp Allergy 2009; 39:972-81. [PMID: 19489917 DOI: 10.1111/j.1365-2222.2009.03229.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND Aspirin-intolerant asthma (AIA) is a subtype of asthma induced by non-steroidal anti-inflammatory drugs and characterized by an aggressive mucosal inflammation of the lower airway (asthma) and the upper airways (rhinitis and nasal polyp). The lower airway lesion and the nasal polyp in AIA are postulated to have common pathogenic features involving aspirin sensitivity that would be reflected in the gene expression profile of AIA polyps. OBJECTIVE This study was conducted to clarify the pathogenesis of AIA using gene expression analysis in nasal polyps, and identify genetic susceptibilities underlying AIA in a case-control association study. METHODS Global gene expression of nasal polyps from nine AIA patients was examined using microarray technology in comparison with nasal polyps from five eosinophilic sinusitis (ES) patients, a related disease lacking aspirin sensitivity. Based on the AIA-specific gene expression profile of nasal polyp, candidate genes for AIA susceptibility were selected and screened by a case-control design of 219 AIA patients, 374 non-asthmatic control (CTR), and 282 aspirin-tolerant asthmatic (ATA) subjects. RESULTS One hundred and forty-three elevated and three decreased genes were identified as AIA-specific genes that were enriched in immune response according to Gene Ontology analysis. In addition, a k-means-based algorithm was applied to cluster the genes, and a subclass characteristic of AIA comprising 18 genes that were also enriched in immune response was identified. By examining the allelic associations of single nucleotide polymorphisms (SNPs) of AIA candidate genes relevant to an immune response with AIA, two SNPs, one each of INDO and IL1R2, showed significant associations with AIA (P=0.011 and 0.026 after Bonferroni's correction, respectively, in AIA vs. CTR). In AIA-ATA association analysis, modest associations of the two SNPs with AIA were observed. CONCLUSION These results indicate that INDO and IL1R2, which were identified from gene expression analyses of nasal polyps in AIA, represent susceptibility genes for AIA.
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Affiliation(s)
- T Sekigawa
- Department of Molecular Life Science, Tokai University School of Medicine, Isehara, Japan
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31
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Tweyongyere R, Mawa PA, Ngom-Wegi S, Ndibazza J, Duong T, Vennervald BJ, Dunne DW, Katunguka-Rwakishaya E, Elliott AM. Effect of praziquantel treatment during pregnancy on cytokine responses to schistosome antigens: results of a randomized, placebo-controlled trial. J Infect Dis 2009; 198:1870-9. [PMID: 18983246 DOI: 10.1086/593215] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Praziquantel treatment of schistosomiasis boosts antischistosome responses, with type 2 helper T cell bias that may contribute to immunologically mediated killing and to protection against reinfection. Praziquantel treatment during pregnancy was recommended in 2002, but the immunological effects of the treatment had not been investigated. METHODS A cohort of 387 Schistosoma mansoni-infected women were recruited from a larger trial of deworming during pregnancy. Women were randomized to receive either praziquantel or placebo during pregnancy. Six weeks after delivery, all women received praziquantel. Cytokine responses to S. mansoni worm and egg antigens were measured in whole blood culture before and 6 weeks after each treatment. RESULTS Schistosome-specific cytokine responses were suppressed during pregnancy. Praziquantel treatment during pregnancy caused significant boosts in interferon-gamma (IFN-gamma), interleukin (IL)-2, IL-4, IL-5, IL-13, and IL-10 responses to schistosome worm antigen and in IFN-gamma, IL-5, and IL-13 responses to schistosome egg antigen, but these boosts were not as substantial as those seen for women treated after delivery. CONCLUSION Pregnancy suppresses a potentially beneficial boost in cytokine responses associated with praziquantel treatment. Further studies are needed on the long-term effects that treatment of schistosomiasis during pregnancy have on morbidity and resistance to reinfection among treated women and their offspring.
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Affiliation(s)
- Robert Tweyongyere
- Medical Research Council/Uganda Virus Research-Institute Uganda Research Unit on AIDS, Entebbe, Uganda.
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32
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Li X, Gui S, Wang H. Effect of Kidney-replenishing herb on the indoleamine 2,3-dioxygenase of human syncytiotrophoblasts cultured in vitro and the balance of helper T-cell cytokines. Gynecol Endocrinol 2007; 23:653-61. [PMID: 17999277 DOI: 10.1080/09513590701665060] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND There is complicated pathogeny involved in spontaneous abortion. At present, the focus of study is on the interface between mother and fetus, the trophoblasts. Indoleamine 2,3-dioxygenase (IDO) is the first and regulatory enzyme in the major route of l-tryptophan catabolism, which induces immunosuppression of T lymphocytes. In the present study we investigated the effect of Kidney-replenishing herb on the expression and activity of IDO in human syncytiotrophoblasts cultured in vitro and the balance of helper T cell (Th) cytokines. METHODS Syncytiotrophoblasts were cultured in vitro for 24, 48 or 72 h, with either control serum or serum made from Kidney-replenishing herb, without or with different concentrations of the IDO inhibitor 1-methyltryptophan (1-MT). Reverse transcription-polymerase chain reaction was applied to analyze the IDO mRNA transcription of syncytiotrophoblasts and Western blotting was applied to determine the expression of IDO protein in syncytiotrophoblasts. The concentration of interleukin-10 and interferon-gamma in co-culture medium of syncytiotrophoblasts and decidual T lymphocytes was determined by enzyme-linked immunosorbent assay. High-performance liquid chromatography was used to determine the concentration of kynurenine (Kyn) and tryptophan (Tyr) in the co-culture medium, and the ratio of Kyn/Try was used to assess IDO activity. RESULTS IDO mRNA and protein were detected in human syncytiotrophoblasts cultured in vitro. The IDO inhibitor 1-MT caused the balance of Th cytokines to depart from type 2; when IDO activity was inhibited, Kidney-replenishing herb improved the expression of IDO mRNA and protein, promoted IDO activity and caused the balance of Th cytokines depart from type 1. CONCLUSION Kidney-replenishing herb improves the expression of IDO mRNA and protein, promotes IDO activity to an appropriate value, resumes the balance of Th cytokines and regulates maternofetal tolerance.
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MESH Headings
- Animals
- Coculture Techniques
- Codonopsis
- Culture Media, Conditioned/analysis
- Cytokines/analysis
- Cytokines/metabolism
- Embryo Culture Techniques
- Enzyme Inhibitors/pharmacology
- Female
- Humans
- Indoleamine-Pyrrole 2,3,-Dioxygenase/antagonists & inhibitors
- Indoleamine-Pyrrole 2,3,-Dioxygenase/genetics
- Indoleamine-Pyrrole 2,3,-Dioxygenase/metabolism
- Interferon-gamma/analysis
- Interleukin-10/analysis
- Kynurenine/analysis
- Plants, Medicinal
- Pregnancy
- RNA, Messenger/analysis
- Rats
- Rats, Sprague-Dawley
- T-Lymphocytes, Helper-Inducer/metabolism
- Trophoblasts/enzymology
- Tryptophan/analogs & derivatives
- Tryptophan/analysis
- Tryptophan/pharmacology
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Affiliation(s)
- Xuelian Li
- The Hospital of Obstetrics & Gynecology, Fudan University, Shanghai, PR China.
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33
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Seavey MM, Mosmann TR. Immunoregulation of fetal and anti-paternal immune responses. Immunol Res 2007; 40:97-113. [DOI: 10.1007/s12026-007-8005-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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34
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Seavey MM, Mosmann TR. Paternal Antigen-Bearing Cells Transferred during Insemination Do Not Stimulate Anti-Paternal CD8+T Cells: Role of Estradiol in Locally Inhibiting CD8+T Cell Responses. THE JOURNAL OF IMMUNOLOGY 2006; 177:7567-78. [PMID: 17114426 DOI: 10.4049/jimmunol.177.11.7567] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Maternal immunological tolerance of the semiallogeneic fetus involves several overlapping mechanisms to balance maternal immunity and fetal development. Anti-paternal CD8+ T cells are suppressed during pregnancy in some but not all mouse models. Since semen has been shown to mediate immune modulation, we tested whether exposure to paternal Ag during insemination activated or tolerized anti-paternal CD8+ T cells. The uterine lumen of mated female mice contained male MHC I+ cells that stimulated effector, but not naive, CD8+ T cells ex vivo. Maternal MHC class I+ myeloid cells fluxed into the uterine lumen in response to mating and cross-presented male H-Y Ag to effector, but not naive, CD8+ T cells ex vivo. However, neither unprimed nor previously primed TCR-transgenic CD8+ T cells specific for either paternal MHC I or H-Y Ag proliferated in vivo after mating. These T cells subsequently responded normally to i.p. challenge, implicating ignorance rather than anergy as the main reason for the lack of response. CD8+ T cells responded to either peptide Ag or male cells delivered intravaginally in ovariectomized mice, but this response was inhibited by systemic estradiol (inducing an estrus-like state). Subcutaneous Ag induced responses in both cases. Allogeneic dendritic cells did not induce responses intravaginally even in ovariectomized mice in the absence of estradiol. These results suggest that inhibition of antiallogeneic responses is restricted both locally to the reproductive tract and temporally to the estrous phase of the menstrual cycle, potentially decreasing the risk of maternal immunization against paternal Ags during insemination.
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Affiliation(s)
- Matthew M Seavey
- David H. Smith Center for Vaccine Biology and Immunology, and Department of Microbiology and Immunology, University of Rochester Medical Center, 601 Elmwood Avenue, Rochester, NY 14642, USA
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35
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Abstract
A significant amount of data generated over the last few years supports the contention that Toll-like receptor (TLR) 9-based immunotherapy is effective in the prevention and treatment of animal models of allergic disorders. We will review here our experience with two distinct therapeutic strategies: TLR9-based immunomodulation and TLR9-based vaccination. Immunomodulation of allergic inflammation by TLR9 ligand (TLR9-L) is transient. It prevents both the early and late phases of the allergic reaction in experimental models of allergic asthma, rhinitis, and conjunctivitis. It also reverses ongoing allergic inflammation. Indoleamine 2.3-dioxygenase, the rate-limiting enzyme of tryptophan, is induced by TLR9-L and mediates, in part, these anti-inflammatory effects. TLR9-based immunomodulation is independent of allergens and, therefore, has a potential therapeutic advantage in a broad spectrum of allergic patients. On the other hand, TLR9-based vaccination therapy is an allergen-specific mode of immunotherapy, which provides long-term inhibition of allergen-specific hypersensitivities. Current clinical trials with TLR9-based immunotherapy demonstrate high immunogenic and therapeutic efficacy, as well as improved safety when compared with conventional allergen desensitization. Thus, if proven efficient, therapeutic strategies with TLR9-L may revolutionize the current treatment of allergic diseases.
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Affiliation(s)
- Tomoko Hayashi
- Department of Medicine, University of California San Diego, La Jolla CA, 92093, USA
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36
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Abumaree MH, Stone PR, Chamley LW. The effects of apoptotic, deported human placental trophoblast on macrophages: possible consequences for pregnancy. J Reprod Immunol 2006; 72:33-45. [PMID: 16843534 DOI: 10.1016/j.jri.2006.03.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2005] [Revised: 03/06/2006] [Accepted: 03/06/2006] [Indexed: 11/19/2022]
Abstract
During pregnancy, trophoblasts are shed into maternal blood from the placenta as they die. Trophoblasts are fetal cells and are therefore immunologically foreign to the maternal immune system, but the effects of shed trophoblasts on the maternal immune system are poorly characterized. We have used an in vitro villous explant model to harvest shed trophoblasts. These shed trophoblasts consist of multinucleated syncytial knots as well as mononuclear cells, and approximately 90% are apoptotic as determined by immunostaining with antibodies recognizing activated caspase-3 and the M30 cytokeratin neoepitope. U937 cells phagocytosed the shed apoptotic trophoblasts and, subsequently, secretion of the anti-inflammatory cytokine IL-10 was increased. In contrast, secretion of the proinflammatory cytokine Il-1beta by U937 cells was decreased after phagocytosis of apoptotic trophoblasts and the changes in both IL-10 and IL-1beta secretion were blocked by co-incubation with the phagocytosis inhibitor cytochalasin B. Shed trophoblasts caused a significant increase also in expression of the, immunosuppressive, tryptophan-metabolizing enzyme indoleamine 2,3-dioxygenase. We speculate that the shedding of trophoblasts may not be simply a mechanism the fetus uses to dispose of aged trophoblasts but rather shed apoptotic trophoblasts may provide a chronic source of tolerizing paternally derived antigens to regulate maternal immune responses to the fetus.
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Affiliation(s)
- M H Abumaree
- Department of Obstetrics and Gynaecology, University of Auckland School of Medicine, Auckland, New Zealand.
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37
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Dokouhaki P, Moghadam R, Akbariasbagh F, Zarnani A, Novin MG, Razavi A, Jeddi-Tehrani M. Expression profile and clonality of T-cell receptor beta variable genes in normal human endometrium. Am J Reprod Immunol 2006; 55:349-59. [PMID: 16635209 DOI: 10.1111/j.1600-0897.2006.00375.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
PROBLEM In spite of their key immunological role, alphabeta+ T cells residing in endometrium have not been extensively explored. We analyzed here expression profile of TCRBV genes in normal human endometrium compared with peripheral blood. METHODS Samples were taken from normal reproductive women. RT-PCR using BV-gene specific primers was performed on blood and endometrial samples. After blotting, hybridization with radiolabelled probe and autoradiography, relative expression of each TCRBV family was determined. Clonal expansions of the over-expressed genes were assessed by CDR3 length polymorphism. RESULTS Only one gene (TCRBV7) was expressed significantly and two other genes marginally more in the endometrium compared with blood. All three TCRBV genes examined showed a rather restricted pattern in the endometrium in contrast to polyclonal patterns in the blood. CONCLUSION Our results stress the similarities between T cells residing in different mucosal tissues and provide a basis for future investigations about endometrial T cells and their antigen specificities in gynecological problems.
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Affiliation(s)
- Pouneh Dokouhaki
- Department of Immunology, Reproductive Biotechnology Center, Avesina Research Institute, Tehran, Iran
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38
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Poljak A, Grant R, Austin CJD, Jamie JF, Willows RD, Takikawa O, Littlejohn TK, Truscott RJW, Walker MJ, Sachdev P, Smythe GA. Inhibition of indoleamine 2,3 dioxygenase activity by H2O2. Arch Biochem Biophys 2006; 450:9-19. [PMID: 16624246 DOI: 10.1016/j.abb.2006.03.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2006] [Revised: 02/12/2006] [Accepted: 03/02/2006] [Indexed: 11/23/2022]
Abstract
Indoleamine 2,3-dioxygenase is the first and rate limiting enzyme of the kynurenine pathway of tryptophan metabolism, has potent effects on cell proliferation and mediates antimicrobial, antitumorogenic, and immunosuppressive effects. As a potent cytotoxic effector, the mechanisms of indoleamine 2,3-dioxygenase inhibition deserve greater attention. The work presented here represents the first systematic study exploring the mechanisms by which low levels of hydrogen peroxide (10-100 microM) inhibit indoleamine 2,3-dioxygenase in vitro. Following brief peroxide exposure both enzyme inhibition and structural changes were observed. Loss of catalysis was accompanied by oxidation of several cysteine residues to sulfinic and sulfonic acids, observed by electrospray and MALDI mass spectrometry. Enzyme activity could in part be preserved in the presence of sulfhydryl containing compounds, particularly DTT and methionine. However, these structural alterations did not prevent substrate (l-tryptophan) binding. Some enzyme activity could be recovered in the presence of thioredoxin, indicating that the inhibitory effect of H(2)O(2) is at least partially reversible in vitro. We present evidence that cysteine oxidation represents one mechanism of indoleamine 2,3-dioxygenase inhibition.
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MESH Headings
- Dose-Response Relationship, Drug
- Enzyme Activation/drug effects
- Enzyme Inhibitors/chemistry
- Enzyme Inhibitors/immunology
- Enzyme Inhibitors/metabolism
- Hydrogen Peroxide/chemistry
- Hydrogen Peroxide/immunology
- Hydrogen Peroxide/metabolism
- Immune Tolerance/physiology
- Indoleamine-Pyrrole 2,3,-Dioxygenase/antagonists & inhibitors
- Indoleamine-Pyrrole 2,3,-Dioxygenase/chemistry
- Indoleamine-Pyrrole 2,3,-Dioxygenase/immunology
- Indoleamine-Pyrrole 2,3,-Dioxygenase/metabolism
- Neoplasms/enzymology
- Neoplasms/immunology
- Oxidation-Reduction/drug effects
- Protein Binding/drug effects
- Protein Structure, Tertiary/drug effects
- Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
- Substrate Specificity/drug effects
- Sulfhydryl Compounds/chemistry
- Tryptophan/chemistry
- Tryptophan/immunology
- Tryptophan/metabolism
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Affiliation(s)
- Anne Poljak
- Bioanalytical Mass Spectrometry Facility, University of New South Wales, Sydney, Australia.
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39
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Derrien M, Faye A, Dolcini G, Chaouat G, Barré-Sinoussi F, Menu E. Impact of the placental cytokine-chemokine balance on regulation of cell-cell contact-induced human immunodeficiency virus type 1 translocation across a trophoblastic barrier in vitro. J Virol 2005; 79:12304-10. [PMID: 16160157 PMCID: PMC1211513 DOI: 10.1128/jvi.79.19.12304-12310.2005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cells constituting the placental barrier secrete soluble factors that may participate in controlling human immunodeficiency virus type 1 (HIV-1) transmission from the mother to the fetus. In this study, we asked whether placental soluble factors (PSF) could limit cell-cell contact inducing HIV-1 production that occurs after inoculation of HIV-1-infected peripheral blood mononuclear cells (HIV-1+ PBMCs) onto trophoblast-derived BeWo cells grown as tight and polarized barriers in a two-chamber system. The activity of recombinant chemokines and cytokines expressed by placental tissue and of factors secreted by either early or term placentae of HIV-1-negative women, was analyzed. We identified chemokines (RANTES and MIP-1beta) and cytokines (tumor necrosis factor alpha and interleukin-8) that decreased and increased, respectively, viral production in trophoblast barrier cells inoculated with HIV-1+ PBMCs. Unexpectedly, factors secreted by either early or term placentae of HIV-1-negative women enhanced viral production. Nevertheless, the same PSF did not favor infection of trophoblastic barriers with cell-free HIV-1 and strongly reduced viral production in PBMCs infected with cell-free HIV-1. Moreover, PSF contained chemokines (RANTES and MIP-1beta) and a cytokine, leukemia inhibitory factor, exhibiting a strong anti-HIV-1 activity in our model of cell-to-cell infection. Together these data suggested that at the maternal interface the global activity of PSF is related to the synergistic action of several soluble factors with a balance in favor of an enhancing activity on the passage of viruses across the trophoblast barrier. This could explain the presence of viral sequences in trophoblasts in all placentae of HIV-1-infected women.
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Affiliation(s)
- Muriel Derrien
- Unité de Régulations des Infections Rétrovirales, Département de Virologie, Institut Pasteur, 25, rue du Dr. Roux 75724 Paris Cedex 15 France
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40
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Flaminio MJBF, Antczak DF. Inhibition of lymphocyte proliferation and activation: a mechanism used by equine invasive trophoblast to escape the maternal immune response. Placenta 2005; 26:148-59. [PMID: 15708116 DOI: 10.1016/j.placenta.2004.05.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/15/2004] [Indexed: 12/14/2022]
Abstract
At days 36-38 of gestation, the equine invasive trophoblast cells migrate into the endometrium of the pregnant mare to form the endometrial cups. During their migration, they become surrounded by maternal CD4+ and CD8+ T lymphocytes, and stimulate a cytotoxic antibody response to the paternal major histocompatibility complex class I antigens that they express. Nevertheless, endometrial cup cells remain viable at the site of uterine invasion up to days 80-100 of gestation, suggesting the participation of immunomodulatory mechanisms to the maternal cellular immune response. To determine the effects of the invasive trophoblast cells on lymphocyte proliferation, an in vitro co-culture system was developed using isolated equine invasive trophoblast cells and peripheral blood lymphocytes. Fetal fibroblast cells from the same conceptuses were used as controls. The presence of invasive trophoblast cells or their pre-conditioned medium inhibited 50% or more of lymphocyte proliferation, while fetal fibroblasts had no effect. The invasive trophoblast cell inhibitory factor needed to be present constantly to affect lymphocyte proliferation, and it was ineffective if lymphocytes had been previously stimulated to proliferate. The lymphoproliferative inhibitory mechanism affected lymphocyte subpopulations similarly. In addition, lymphocyte expression of cytokine mRNA including IFNgamma, IL-2, IL-4, and IL-10 was affected compared to controls. The implication of these observations in vivo may explain, in part, the apparent equine maternal immune acceptance of the presence and development of endometrial cup cells.
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Affiliation(s)
- M J B F Flaminio
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
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41
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Myers L, Croft M, Kwon BS, Mittler RS, Vella AT. Peptide-specific CD8 T regulatory cells use IFN-gamma to elaborate TGF-beta-based suppression. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2005; 174:7625-32. [PMID: 15944263 DOI: 10.4049/jimmunol.174.12.7625] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We identified a murine peptide-specific CD8 T regulatory cell population able to suppress responding CD4 T cells. Immunization with OVA, poly(I:C), and anti-4-1BB generated a population of SIINFEKL-specific CD8 T regulatory cells that profoundly inhibited peptide-responding CD4 T cells from cellular division. The mechanism of suppression required IFN-gamma, but IFN-gamma alone was not sufficient to suppress the responding CD4 T cells. The data show that CD8 T regulatory cells were unable to suppress unless they engaged IFN-gamma. Furthermore, even in the absence of recall with peptide, the CD8 T regulatory cells suppressed CD4 responses as long as IFN-gamma was present. To examine the effector mechanism of suppression, we showed that neutralizing TGF-beta inhibited suppression because inclusion of anti-TGF-beta rescued the proliferative capacity of the responding cells. TGF-beta-based suppression was dependent completely upon the CD8 T regulatory cells being capable of binding IFN-gamma. This was the case, although peptide recall of primed IFN-gamma (-/-) or IFN-gammaR(-/-) CD8 T cells up-regulated pro-TGF-beta protein as measured by surface latency-associated peptide expression but yet were unable to suppress. Finally, we asked whether the CD8 T regulatory cells were exposed to active TGF-beta in vivo and showed that only wild-type CD8 T regulatory cells expressed the TGF-beta-dependent biomarker CD103, suggesting that latency-associated peptide expression is not always congruent with elaboration of active TGF-beta. These data define a novel mechanism whereby IFN-gamma directly stimulates CD8 T regulatory cells to elaborate TGF-beta-based suppression. Ultimately, this mechanism may permit regulation of pathogenic Th1 responses by CD8 T regulatory cells.
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MESH Headings
- Animals
- Antigens, CD/biosynthesis
- CD4-Positive T-Lymphocytes/immunology
- Cell Proliferation
- Cells, Cultured
- Egg Proteins/administration & dosage
- Egg Proteins/immunology
- Epitopes, T-Lymphocyte/administration & dosage
- Epitopes, T-Lymphocyte/immunology
- Integrin alpha Chains/biosynthesis
- Interferon-gamma/metabolism
- Interferon-gamma/physiology
- Ligands
- Lymphocyte Activation/immunology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Mutant Strains
- Mice, Transgenic
- Ovalbumin/administration & dosage
- Ovalbumin/immunology
- Peptide Fragments
- Protein Binding/immunology
- Receptors, Interferon/metabolism
- Receptors, Interferon/physiology
- T-Lymphocytes, Regulatory/immunology
- T-Lymphocytes, Regulatory/metabolism
- Transforming Growth Factor beta/physiology
- Interferon gamma Receptor
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Affiliation(s)
- Lara Myers
- Division of Immunology, University of Connecticut Health Center, Farmington, CT 06032, USA
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42
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Zenclussen AC, Gerlof K, Zenclussen ML, Sollwedel A, Bertoja AZ, Ritter T, Kotsch K, Leber J, Volk HD. Abnormal T-cell reactivity against paternal antigens in spontaneous abortion: adoptive transfer of pregnancy-induced CD4+CD25+ T regulatory cells prevents fetal rejection in a murine abortion model. THE AMERICAN JOURNAL OF PATHOLOGY 2005; 166:811-22. [PMID: 15743793 PMCID: PMC1602357 DOI: 10.1016/s0002-9440(10)62302-4] [Citation(s) in RCA: 409] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Mammalian pregnancy is thought to be a state of immunological tolerance. The mechanisms underlying this phenomenon are still poorly understood. Here, we determined whether an inappropriate function of T regulatory (Treg) cells is involved in the pathogenesis of spontaneous abortion. We evaluated spleen and decidual lymphocytes from CBA/J mice undergoing immunological abortion (DBA/2J-mated) or having normal pregnancy (BALB/c-mated) on day 14 of gestation for ex vivo cytokine production after PMA or paternal antigen (alloantigen) stimulation. Treg activity was characterized by quantifying CD4(+)CD25(+) cells, foxp3 expression, and interleukin-10 secretion. Decidual lymphocytes from abortion CBA/J mice contained a significantly higher frequency of interferon-gamma-producing T cells specific for paternal antigens compared to those from normal pregnancy (7.8% versus 2.7%, P < 0.05). Compared to virgin CBA/J females, normal pregnant mice showed strongly elevated numbers of CD4(+)CD25(+) and interleukin-10(+) Treg cells in the thymus whereas significantly lower frequencies of Treg cells were observed in abortion mice. Very interestingly, CD4(+)CD25(+) Treg cells from normal pregnant and nonpregnant CBA/J mice could inhibit both proliferation and interferon-gamma secretion of lymphocytes from abortion mice in vitro whereas in vivo prevention of fetal rejection could only be achieved after adoptive transfer of Treg cells from normal pregnant mice. Our data suggest that pregnancy-induced Treg cells play a vital role in maternal tolerance to the allogeneic fetus.
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Affiliation(s)
- Ana Claudia Zenclussen
- Institut für Medizinische Immunologie, Biomedizinisches Forschungszentrum, Raum 2.0534, Charité, Campus Virchow Klinikum, Augustenburger Platz 1, D-13353, Berlin, Germany.
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Abstract
Mammalian pregnancy is thought to be a state of immunological tolerance and immunological pregnancy complications may result from incomplete allo-tolerance. We reported recently a higher frequency of Th1 cytokine-producing T cells specific against paternal antigens in abortion-prone mice compared to normal pregnant mice. Since Th2 cells were shown to be not essential for normal pregnancy; alloreactive Th1 cells must be differently regulated. In this context, T regulatory cells (Treg) were proposed to play an essential role. Normal pregnant mice show an expansion of CD4(+)CD25+ and IL-10+ Treg cells at the periphery compared to non-pregnant animals. Further, we reported significantly lower frequencies of Treg in abortion-prone mice. Interestingly, CD4(+)CD25+ Treg cells from normal pregnant mice were able to prevent fetal rejection. Accordingly, down-regulated levels of Treg were also reported during human miscarriage. The putative mechanisms involved in Treg-induced tolerance in mice and humans are discussed in this review.
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Affiliation(s)
- Ana Claudia Zenclussen
- Institute of Medical Immunology, Medical University Berlin, Biomedizinisches Forschungszentrum, Raum 2.0534, Charité, Campus Virchow Klinikum, Augustenburger Platz 1, D-13353 Berlin, Germany.
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Alanen A, Kahala K, Vahlberg T, Koskela P, Vainionpää R. Seroprevalence, incidence of prenatal infections and reliability of maternal history of varicella zoster virus, cytomegalovirus, herpes simplex virus and parvovirus B19 infection in South-Western Finland. BJOG 2005; 112:50-6. [PMID: 15663397 DOI: 10.1111/j.1471-0528.2004.00320.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To study seroprevalence and incidence and fetal transmission of varicella zoster virus (VZV), cytomegalovirus (CMV), herpes simplex virus (HSV) types 1 and 2 and parvovirus B19 infections during pregnancy and to evaluate the reliability of maternal past history of VZV, HSV and parvovirus infections. DESIGN Prospective study of parturient women. SETTING South-Western Finland. PARTICIPANTS Five hundred and fifty-eight parturient women. METHODS IgG and IgM antibodies against VZV, CMV, HSV-1 and -2, and parvovirus B19 were measured from maternal serum in the first trimester and at delivery and from cord serum, mother's own information of her past infections was compared with her serological status. MAIN OUTCOME MEASURES Seroprevalence, seroconversions and fetal transmission of VZV, CMV, HSV and parvovirus B19, reliability of maternal history of VZV, HSV and parvovirus B19. RESULTS Seroprevalences were 96.2% for VZV, 56.3% for CMV, 54.3% for HSV, 46.8% for HSV-1, 9.3% for HSV-2 and 58.6% for parvovirus B19. Parity was associated with CMV seropositivity, maternal age differed only between HSV-2 seropositive and seronegative women, while area of residence (urban or rural) had no effect. Six seroconversions were observed: two VZV, one CMV and three parvovirus infections. No cases of primary HSV infections occurred. Fetal transmission was observed in two cases of parvovirus infection. No infants with anti-CMV IgM antibodies were born to CMV immunised women. False positive history of chickenpox was given only by 1.5% of the women, history of herpes infections was less reliable, and history of parvovirus infection was unreliable. CONCLUSIONS Seroprevalence and the risk of viral infections during pregnancy cannot be extrapolated from one pregnant population to another.
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Affiliation(s)
- Anna Alanen
- Department of Obstetrics and Gynaecology, University of Turku, Finland
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Ellis L, Hellberg J. Fetal exposure to prescription drugs and adult sexual orientation. PERSONALITY AND INDIVIDUAL DIFFERENCES 2005. [DOI: 10.1016/j.paid.2004.04.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Austin CJD, Mizdrak J, Matin A, Sirijovski N, Kosim-Satyaputra P, Willows RD, Roberts TH, Truscott RJW, Polekhina G, Parker MW, Jamie JF. Optimised expression and purification of recombinant human indoleamine 2,3-dioxygenase. Protein Expr Purif 2004; 37:392-8. [PMID: 15358362 DOI: 10.1016/j.pep.2004.06.025] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2004] [Revised: 06/18/2004] [Indexed: 10/26/2022]
Abstract
The hemoprotein indoleamine 2,3-dioxygenase (IDO) is the first and rate-limiting enzyme in mammalian tryptophan metabolism. It has received considerable attention in recent years, particularly due to its role in the pathogenesis of many diseases. Here, we report attempts to improve soluble expression and purification of hexahistidyl-tagged recombinant human IDO from Escherichia coli (EC538, pREP4, and pQE9-IDO). Significant formation of inclusion bodies was noted at the growth temperature of 37 degrees C, with reduced formation at 30 degrees C. The addition of the natural biosynthetic precursor of protoporphrin IX, delta-aminolevulinic acid (ALA), coupled with optimisation of IPTG induction levels during expression at 30 degrees C and purification by nickel-agarose and size exclusion chromatography, resulted in protein with 1 mol of heme/mol of protein and a specific activity of 160 micromol of kynurenine/h/mg of protein (both identical to native human IDO). The protein was homogeneous in terms of electrophoretic analysis. Yields of soluble protein (3-5 mg/L of bacterial culture) and heme content are greater than previously reported.
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Hayashi T, Beck L, Rossetto C, Gong X, Takikawa O, Takabayashi K, Broide DH, Carson DA, Raz E. Inhibition of experimental asthma by indoleamine 2,3-dioxygenase. J Clin Invest 2004; 114:270-9. [PMID: 15254594 PMCID: PMC449749 DOI: 10.1172/jci21275] [Citation(s) in RCA: 239] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2004] [Accepted: 05/18/2004] [Indexed: 01/22/2023] Open
Abstract
Epidemiological evidence points to the inverse relationship between microbial exposure and the prevalence of allergic asthma and autoimmune diseases in Westernized countries. The molecular basis for this observation has not yet been completely delineated. Here we report that the administration of certain toll-like receptor (TLR) ligands, via the activation of innate immunity, induces high levels of indoleamine 2,3-dioxygenase (IDO), the rate-limiting enzyme of tryptophan catabolism in various organs. TLR9 ligand-induced pulmonary IDO activity inhibits Th2-driven experimental asthma. IDO activity expressed by resident lung cells rather than by pulmonary DCs suppressed lung inflammation and airway hyperreactivity. Our results provide a mechanistic insight into the various formulations of the hygiene hypothesis and underscore the notion that activation of innate immunity can inhibit adaptive Th cell responses.
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Affiliation(s)
- Tomoko Hayashi
- University of California, San Diego, Department of Medicine, La Jolla 92093-0663, USA
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Baban B, Chandler P, McCool D, Marshall B, Munn DH, Mellor AL. Indoleamine 2,3-dioxygenase expression is restricted to fetal trophoblast giant cells during murine gestation and is maternal genome specific. J Reprod Immunol 2004; 61:67-77. [PMID: 15063630 DOI: 10.1016/j.jri.2003.11.003] [Citation(s) in RCA: 210] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 11/13/2003] [Accepted: 11/13/2003] [Indexed: 10/26/2022]
Abstract
Pharmacologic inhibition of indoleamine 2,3 dioxygenase (IDO) activity during murine pregnancy results in rejection of allogeneic fetuses by the maternal immune system. Here, we show that IDO expression is restricted to perinuclear regions of primary trophoblast giant cells (TGCs) of fetal origin at mid-gestation (E10.5). After placentation (E14), no IDO expression was detected at the maternal-fetal interface. Matings involving IDO-deficient females revealed that paternally inherited IDO alleles were inactive in primary TGCs, presumably due to paternal genome-specific gene inactivation. Allogeneic matings in which both parents were genetically IDO-deficient produced litters of normal sizes at normal rates compared to IDO-sufficient parental mice, implying that compensatory or redundant immunosuppressive mechanisms protected allogeneic fetuses during gestation in IDO-deficient mice. Consistent with this notion, treatment with IDO inhibitor did not affect allogeneic pregnancy rates when both parents were IDO-deficient, confirming that IDO was the relevant pharmacologic target of the IDO inhibitor in matings involving IDO-sufficient mice. Hence, IDO is a key immunosuppressive mechanism in normal murine pregnancies, and it is regulated entirely through maternally inherited fetal genes.
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Affiliation(s)
- Babak Baban
- Department of Medicine, Institute of Molecular Medicine and Genetics, Medical College of Georgia 1120, 15th Street, Augusta, GA 30912-2600, USA
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Mantuano-Barradas M, Henriques-Pons A, Araújo-Jorge TC, Di Virgilio F, Coutinho-Silva R, Persechini PM. Extracellular ATP induces cell death in CD4+/CD8+ double-positive thymocytes in mice infected with Trypanosoma cruzi. Microbes Infect 2004; 5:1363-71. [PMID: 14670449 DOI: 10.1016/j.micinf.2003.09.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In the acute phase of Trypanosoma cruzi infection, there is dramatic atrophy of the thymus. However, the pathways involved in this change have not yet been identified. This event is mainly characterized by a massive loss of cortical CD4+/CD8+ double-positive cells, but also by other structural and functional alterations in the organ. A number of molecules, including extracellular ATP, have been suggested to play a role in the selective processes that take place in the thymus. ATP and analogues trigger many different cellular responses in thymocytes and other cell types, such as the opening of plasma membrane cation channels and a pore that may induce cell death. Herein, we investigated the possible involvement of extracellular ATP in thymus atrophy induced by infection with T. cruzi. We observed that ATP induces an increase in plasma membrane permeabilization and cellular death in CD4+/CD8+ double-positive thymocytes collected from infected mice during the atrophy phase. No differences were observed prior to the atrophy phase or during the chronic phase. Our results indicate that P2Z/P2X7 receptors may play a central role in thymus atrophy during T. cruzi infection.
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Affiliation(s)
- Marcio Mantuano-Barradas
- Laboratório de Imunobiofísica, Instituto de Biofísica Carlos Chagas Filho, UFRJ, Bloco G do CCS, Cidade Universitária, Ilha do Fundão, 21941-590 Rio de Janeiro, Brazil
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Murray MF. Tryptophan depletion and HIV infection: a metabolic link to pathogenesis. THE LANCET. INFECTIOUS DISEASES 2003; 3:644-52. [PMID: 14522263 DOI: 10.1016/s1473-3099(03)00773-4] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
HIV-1-infected patients have low circulating tryptophan concentrations despite evidence of adequate dietary intake of this essential amino acid. A chronic increase in inducible tryptophan oxidation is the basis of HIV-1-associated tryptophan depletion. This metabolic process results in the irretrievable loss of tryptophan molecules from the available pool. Such sustained disruption of normal tryptophan metabolism over time disturbs the many metabolic processes involving this amino acid, and has been implicated in some features of AIDS pathogenesis. Normal T-cell function is adversely affected by tryptophan depletion, but the extent of the effect in HIV-1-infected patients is still unclear. Attempting to directly supplement tryptophan is not advised given the potential increase in circulating concentrations of neurotoxic intermediates. Although only preliminary data are available, evidence suggests that antiretroviral and nicotinamide treatments can boost plasma tryptophan concentrations in HIV-1-infected patients and impact the secondary effects of tryptophan depletion. Additional study of this metabolism could lead to improved treatment strategies for patients with HIV infection. In this review I focus on the potential links between disturbed tryptophan metabolism and pathogenesis.
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Affiliation(s)
- Michael F Murray
- Department of Medicine, Brigham and Women's Hospital, Harvard University, Boston, MA 02115-6110, USA.
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