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Schaub R, Badiou S, Viljoen J, Dujols P, Bolloré K, Van de Perre P, Newell ML, Bland R, Nagot N, Tuaillon E. The immune response to sub-clinical mastitis is impaired in HIV-infected women. J Transl Med 2018; 16:296. [PMID: 30359283 PMCID: PMC6202806 DOI: 10.1186/s12967-018-1667-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 10/17/2018] [Indexed: 11/23/2022] Open
Abstract
Background Subclinical mastitis (SCM) is relatively common in lactating women and may be associated with HIV shedding in breast milk. The potential association between HIV infection and breast milk immunologic factors and immune response to SCM needs to be addressed. Methods In this cross-sectional study, SCM (Na/K ratio > 1) was tested in 165 mature breast milk samples collected from 40 HIV-infected women who didn’t transmit HIV to their child by breastfeeding and 43 HIV-uninfected women enrolled in an interventional cohort in South-Africa (Vertical Transmission Study). The level of 33 immune markers related to Th1/Th2 related response, inflammation and bacterial exposure were compared in ART-naive HIV-infected versus HIV-uninfected women. The associations between HIV infection and SCM on the concentration of immune factors were tested separately by Wilcoxon rank-sum test and corrected for false discovery rate. To control for potential confounder effects and take into account the clustering of breast milk samples from a single woman, multivariate mixed linear models adjusted on child age at the time of sampling were performed for each immune factor. Results Subclinical mastitis was detected in 15 (37.5%) HIV-infected women and 10 (23.3%) HIV-uninfected women. In the absence of SCM, the breast milk levels of IP-10 and MIG were higher and IL1-RA lower in HIV-infected women than in HIV-uninfected women (respectively p < 0.001, p = 0.001, p = 0.045). In HIV-uninfected women, SCM was characterized by a robust immune response with higher concentrations of a broad panel of Th1 and inflammatory related immune markers than in samples without SCM. By contrast, in HIV-infected women a limited number of immune markers were increased and lower increases were observed in samples with SCM than without SCM. Conclusion HIV infection in ART-naïve women was associated with elevated breast milk levels of IP-10 and MIG, which areTh1-related cytokines induced by IFN-γ. During SCM, a lower and narrower immune response was observed in HIV-infected than HIV-uninfected women, suggesting that HIV infection affects the capacity of the mammary gland to respond to SCM. Electronic supplementary material The online version of this article (10.1186/s12967-018-1667-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Roxane Schaub
- Pathogenesis and Control of Chronic Infections, INSERM, EFS, Université Montpellier 1, Montpellier, France. .,Département d'Information Médicale, CHU de Montpellier, Montpellier, France. .,CIC AG/Inserm 1424, Centre Hospitalier de Cayenne, Av. des flamboyants, BP 6006, 97 306, Cayenne CEDEX, French Guiana, France.
| | - Stéphanie Badiou
- Département de Biochimie, CHU de Montpellier, Montpellier, France
| | - Johannes Viljoen
- Department of Medical Virology, University of Pretoria and NHLS, Pretoria, South Africa
| | - Pierre Dujols
- Pathogenesis and Control of Chronic Infections, INSERM, EFS, Université Montpellier 1, Montpellier, France.,Département d'Information Médicale, CHU de Montpellier, Montpellier, France
| | - Karine Bolloré
- Pathogenesis and Control of Chronic Infections, INSERM, EFS, Université Montpellier 1, Montpellier, France
| | - Philippe Van de Perre
- Pathogenesis and Control of Chronic Infections, INSERM, EFS, Université Montpellier 1, Montpellier, France.,Département de Bactériologie-Virologie, CHU de Montpellier, Montpellier, France
| | - Marie-Louise Newell
- Institute for Developmental Science, Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, UK.,School of Public Health, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa
| | - Ruth Bland
- Africa Centre for Health and Population studies, University of KwaZulu-Natal, Durban, South Africa.,School of Public Health, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa.,Royal Hospital for Children, Institute of Health and Wellbeing, University of Glasgow, Glasgow, UK
| | - Nicolas Nagot
- Pathogenesis and Control of Chronic Infections, INSERM, EFS, Université Montpellier 1, Montpellier, France.,Département d'Information Médicale, CHU de Montpellier, Montpellier, France
| | - Edouard Tuaillon
- Pathogenesis and Control of Chronic Infections, INSERM, EFS, Université Montpellier 1, Montpellier, France.,Département de Bactériologie-Virologie, CHU de Montpellier, Montpellier, France
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2
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Milligan C, Slyker JA, Overbaugh J. The Role of Immune Responses in HIV Mother-to-Child Transmission. Adv Virus Res 2017; 100:19-40. [PMID: 29551137 DOI: 10.1016/bs.aivir.2017.10.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
HIV mother-to-child transmission (MTCT) represents a success story in the HIV/AIDS field given the significant reduction in number of transmission events with the scale-up of antiretroviral treatment and other prevention methods. Nevertheless, MTCT still occurs and better understanding of the basic biology and immunology of transmission will aid in future prevention and treatment efforts. MTCT is a unique setting given that the transmission pair is known and the infant receives passively transferred HIV-specific antibodies from the mother while in utero. Thus, infant exposure to HIV occurs in the face of HIV-specific antibodies, especially during delivery and breastfeeding. This review highlights the immune correlates of protection in HIV MTCT including humoral (neutralizing antibodies, antibody-dependent cellular cytotoxicity, and binding epitopes), cellular, and innate immune factors. We further discuss the future implications of this research as it pertains to opportunities for passive and active vaccination with the ultimate goal of eliminating HIV MTCT.
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Affiliation(s)
- Caitlin Milligan
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA, United States; Medical Scientist Training Program, University of Washington School of Medicine, Seattle, WA, United States.
| | | | - Julie Overbaugh
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA, United States; Medical Scientist Training Program, University of Washington School of Medicine, Seattle, WA, United States
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3
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Abstract
α, β, and θ defensins are effectors of the innate immune system with potent antibacterial, antiviral, and antifungal activity. Defensins have direct antiviral activity in cell culture, with varied mechanisms for individual viruses, although some common themes have emerged. In addition, defensins have potent immunomodulatory activity that can alter innate and adaptive immune responses to viral infection. In some cases, there is evidence for paradoxical escape from defensin neutralization or enhancement of viral infection. The direct and indirect activities of defensins have led to their development as therapeutics and vaccine components. The major area of investigation that continues to lag is the connection between the effects of defensins in cell culture models and viral pathogenesis in vivo. Model systems to study defensin biology, including more physiologic models designed to bridge this gap, are also discussed.
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Affiliation(s)
- Mayumi K Holly
- Department of Microbiology, University of Washington, Seattle, Washington 98195;
| | - Karina Diaz
- Department of Microbiology, University of Washington, Seattle, Washington 98195;
| | - Jason G Smith
- Department of Microbiology, University of Washington, Seattle, Washington 98195;
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4
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Valere K, Rapista A, Eugenin E, Lu W, Chang TL. Human Alpha-Defensin HNP1 Increases HIV Traversal of the Epithelial Barrier: A Potential Role in STI-Mediated Enhancement of HIV Transmission. Viral Immunol 2015; 28:609-15. [PMID: 26379091 DOI: 10.1089/vim.2014.0137] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Alpha-defensins, including human neutrophil peptides 1-3 (HNP1-3) and human defensin 5 (HD5), are elevated at the genital mucosa in individuals with sexually transmitted infections (STIs). The presence of STIs is associated with an increased risk of human immunodeficiency virus (HIV) transmission, suggesting there may be a role for defensins in early events of HIV transmission. HD5 has been demonstrated to contribute to STI-mediated increased HIV infectivity in vitro. HNPs exhibit anti-HIV activity in vitro. However, increased levels of HNPs have been associated with enhanced HIV acquisition and higher viral load in breast milk. This study found that HNP1, but not HD5, significantly disrupted epithelial integrity and promoted HIV traversal of epithelial barriers. Linear HNP1 with the same charges did not affect epithelial permeability, indicating that the observed effect of HNP1 on the epithelial barrier was structure dependent. These results suggest a role for HNP1 in STI-mediated enhancement of HIV transmission.
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Affiliation(s)
- Kimyata Valere
- 1 Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers, The State University of New Jersey , New Jersey Medical School, Newark, New Jersey
| | - Aprille Rapista
- 2 Public Health Research Institute, Rutgers, The State University of New Jersey , New Jersey Medical School, Newark, New Jersey
| | - Eliseo Eugenin
- 1 Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers, The State University of New Jersey , New Jersey Medical School, Newark, New Jersey.,2 Public Health Research Institute, Rutgers, The State University of New Jersey , New Jersey Medical School, Newark, New Jersey
| | - Wuyuan Lu
- 3 Institute of Human Virology, University of Maryland School of Medicine , Baltimore, Maryland
| | - Theresa L Chang
- 1 Department of Microbiology, Biochemistry and Molecular Genetics, Rutgers, The State University of New Jersey , New Jersey Medical School, Newark, New Jersey.,2 Public Health Research Institute, Rutgers, The State University of New Jersey , New Jersey Medical School, Newark, New Jersey
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5
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6
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Soluble toll-like receptor 2 is significantly elevated in HIV-1 infected breast milk and inhibits HIV-1 induced cellular activation, inflammation and infection. AIDS 2014; 28:2023-32. [PMID: 25265071 DOI: 10.1097/qad.0000000000000381] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES We previously demonstrated that immunodepletion of soluble Toll-like receptor 2 (sTLR2) from human breast milk significantly increased HIV infection in vitro. The aims of this study were to characterize sTLR2 levels in breast milk from HIV-infected and uninfected women, and identify a mechanism by which sTLR2 inhibits HIV-induced cellular activation and infection. DESIGN Blinded studies of breast milk from HIV-infected and uninfected Nigerian and Canadian women were evaluated for levels of sTLR2, proinflammatory cytokines and viral antigenemia. In-vitro experiments were conducted using cell lines to assess sTLR2 function in innate responses and effect on HIV infection. RESULTS Breast milk from HIV-infected women showed significantly higher levels of sTLR2 than uninfected breast milk. Further, sTLR2 levels correlated with HIV-1 p24 and interleukin (IL)-15, thus suggesting a local innate compensatory response in the HIV-infected breast. Given the significantly higher levels of sTLR2 in breast milk from HIV-infected women, we next demonstrated that mammary epithelial cells and macrophages, which are prevalent in milk, produced significantly increased levels of sTLR2 following exposure to HIV-1 proteins p17, p24 and gp41 or the TLR2 ligand, Pam3CSK4. Our results also demonstrated that sTLR2 physically interacts with p17, p24 and gp41 and inhibits HIV-induced nuclear factor kappa-light-chain-enhancer of activated B cells activation, and inflammation. Importantly, binding of sTLR2 to HIV-1 proteins inhibited a TLR2-dependent increase in chemokine receptor 5 expression, thus resulting in significantly reduced HIV-1 infection. CONCLUSION These results indicate novel mechanisms by which sTLR2 plays a critical role in inhibiting mother-to-child HIV transmission.
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7
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Abstract
Most infants born to human immunodeficiency virus (HIV)-infected women escape HIV infection. Infants evade infection despite an immature immune system and, in the case of breastfeeding, prolonged repetitive exposure. If infants become infected, the course of their infection and response to treatment differs dramatically depending upon the timing (in utero, intrapartum, or during breastfeeding) and potentially the route of their infection. Perinatally acquired HIV infection occurs during a critical window of immune development. HIV's perturbation of this dynamic process may account for the striking age-dependent differences in HIV disease progression. HIV infection also profoundly disrupts the maternal immune system upon which infants rely for protection and immune instruction. Therefore, it is not surprising that infants who escape HIV infection still suffer adverse effects. In this review, we highlight the unique aspects of pediatric HIV transmission and pathogenesis with a focus on mechanisms by which HIV infection during immune ontogeny may allow discovery of key elements for protection and control from HIV.
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8
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Wilson SS, Wiens ME, Smith JG. Antiviral mechanisms of human defensins. J Mol Biol 2013; 425:4965-80. [PMID: 24095897 PMCID: PMC3842434 DOI: 10.1016/j.jmb.2013.09.038] [Citation(s) in RCA: 198] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Revised: 09/25/2013] [Accepted: 09/26/2013] [Indexed: 12/21/2022]
Abstract
Defensins are an effector component of the innate immune system with broad antimicrobial activity. Humans express two types of defensins, α- and β-defensins, which have antiviral activity against both enveloped and non-enveloped viruses. The diversity of defensin-sensitive viral species reflects a multitude of antiviral mechanisms. These include direct defensin targeting of viral envelopes, glycoproteins, and capsids in addition to inhibition of viral fusion and post-entry neutralization. Binding and modulation of host cell surface receptors and disruption of intracellular signaling by defensins can also inhibit viral replication. In addition, defensins can function as chemokines to augment and alter adaptive immune responses, revealing an indirect antiviral mechanism. Nonetheless, many questions regarding the antiviral activities of defensins remain. Although significant mechanistic data are known for α-defensins, molecular details for β-defensin inhibition are mostly lacking. Importantly, the role of defensin antiviral activity in vivo has not been addressed due to the lack of a complete defensin knockout model. Overall, the antiviral activity of defensins is well established as are the variety of mechanisms by which defensins achieve this inhibition; however, additional research is needed to fully understand the role of defensins in viral pathogenesis.
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Affiliation(s)
| | | | - Jason G. Smith
- University of Washington School of Medicine, Box 357735, 1705 North East Pacific Street, Seattle, WA 98195, USA
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9
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King CC, Ellington SR, Kourtis AP. The role of co-infections in mother-to-child transmission of HIV. Curr HIV Res 2013; 11:10-23. [PMID: 23305198 PMCID: PMC4411038 DOI: 10.2174/1570162x11311010003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 12/11/2012] [Accepted: 12/14/2012] [Indexed: 01/27/2023]
Abstract
In HIV-infected women, co-infections that target the placenta, fetal membranes, genital tract, and breast tissue, as well as systemic maternal and infant infections, have been shown to increase the risk for mother-to-child transmission of HIV (MTCT). Active co-infection stimulates the release of cytokines and inflammatory agents that enhance HIV replication locally or systemically and increase tissue permeability, which weakens natural defenses to MTCT. Many maternal or infant co-infections can affect MTCT of HIV, and particular ones, such as genital tract infection with herpes simplex virus, or systemic infections such as hepatitis B, can have substantial epidemiologic impact on MTCT. Screening and treatment for co-infections that can make infants susceptible to MTCT in utero, peripartum, or postpartum can help reduce the incidence of HIV infection among infants and improve the health of mothers and infants worldwide.
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Affiliation(s)
- Caroline C King
- Division of Reproductive Health, NCCDPHP, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, MS-K34, Atlanta, GA 30341, USA.
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10
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Virologic determinants of breast milk transmission of HIV-1. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 743:69-80. [PMID: 22454342 DOI: 10.1007/978-1-4614-2251-8_5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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11
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Mabuka J, Nduati R, Odem-Davis K, Peterson D, Overbaugh J. HIV-specific antibodies capable of ADCC are common in breastmilk and are associated with reduced risk of transmission in women with high viral loads. PLoS Pathog 2012; 8:e1002739. [PMID: 22719248 PMCID: PMC3375288 DOI: 10.1371/journal.ppat.1002739] [Citation(s) in RCA: 180] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 04/23/2012] [Indexed: 01/25/2023] Open
Abstract
There are limited data describing the functional characteristics of HIV-1 specific antibodies in breast milk (BM) and their role in breastfeeding transmission. The ability of BM antibodies to bind HIV-1 envelope, neutralize heterologous and autologous viruses and direct antibody-dependent cell cytotoxicity (ADCC) were analyzed in BM and plasma obtained soon after delivery from 10 non-transmitting and 9 transmitting women with high systemic viral loads and plasma neutralizing antibodies (NAbs). Because subtype A is the dominant subtype in this cohort, a subtype A envelope variant that was sensitive to plasma NAbs was used to assess the different antibody activities. We found that NAbs against the subtype A heterologous virus and/or the woman's autologous viruses were rare in IgG and IgA purified from breast milk supernatant (BMS)--only 4 of 19 women had any detectable NAb activity against either virus. Detected NAbs were of low potency (median IC50 value of 10 versus 647 for the corresponding plasma) and were not associated with infant infection (p = 0.58). The low NAb activity in BMS versus plasma was reflected in binding antibody levels: HIV-1 envelope specific IgG titers were 2.2 log(10) lower (compared to 0.59 log(10) lower for IgA) in BMS versus plasma. In contrast, antibodies capable of ADCC were common and could be detected in the BMS from all 19 women. BMS envelope-specific IgG titers were associated with both detection of IgG NAbs (p = 0.0001) and BMS ADCC activity (p = 0.014). Importantly, BMS ADCC capacity was inversely associated with infant infection risk (p = 0.039). Our findings indicate that BMS has low levels of envelope specific IgG and IgA with limited neutralizing activity. However, this small study of women with high plasma viral loads suggests that breastmilk ADCC activity is a correlate of transmission that may impact infant infection risk.
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Affiliation(s)
- Jennifer Mabuka
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Program of Pathobiology, Department of Global Health, University of Washington, Seattle, Washington, United States of America
| | - Ruth Nduati
- Department of Pediatrics, University of Nairobi, Nairobi, Kenya
| | - Katherine Odem-Davis
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Dylan Peterson
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Julie Overbaugh
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
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12
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Bélec L, Kourtis AP. B lymphocyte-derived humoral immune defenses in breast milk transmission of the HIV-1. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 743:139-60. [PMID: 22454347 DOI: 10.1007/978-1-4614-2251-8_10] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Laurent Bélec
- Sorbonne Paris Cité (Paris V), and Laboratoire de Virologie, Hôpital Européen Georges Pompidou, Université Paris Descartes, 15-20 rue Leblanc, 75 908, Paris Cedex 15, France.
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13
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Tomescu C, Abdulhaqq S, Montaner LJ. Evidence for the innate immune response as a correlate of protection in human immunodeficiency virus (HIV)-1 highly exposed seronegative subjects (HESN). Clin Exp Immunol 2011; 164:158-69. [PMID: 21413945 DOI: 10.1111/j.1365-2249.2011.04379.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The description of highly exposed individuals who remain seronegative (HESN) despite repeated exposure to human immunodeficiency virus (HIV)-1 has heightened interest in identifying potential mechanisms of HIV-1 resistance. HIV-specific humoral and T cell-mediated responses have been identified routinely in HESN subjects, although it remains unknown if these responses are a definitive cause of protection or merely a marker for exposure. Approximately half of HESN lack any detectible HIV-specific adaptive immune responses, suggesting that other mechanisms of protection from HIV-1 infection also probably exist. In support of the innate immune response as a mechanism of resistance, increased natural killer (NK) cell activity has been correlated with protection from infection in several high-risk cohorts of HESN subjects, including intravenous drug users, HIV-1 discordant couples and perinatally exposed infants. Inheritance of protective NK KIR3DL1(high) and KIR3DS1 receptor alleles have also been observed to be over-represented in a high-risk cohort of HESN intravenous drug users and HESN partners of HIV-1-infected subjects. Other intrinsic mechanisms of innate immune protection correlated with resistance in HESN subjects include heightened dendritic cell responses and increased secretion of anti-viral factors such as β-chemokines, small anti-viral factors and defensins. This review will highlight the most current evidence in HESN subjects supporting the role of epithelial microenvironment and the innate immune system in sustaining resistance against HIV-1 infection. We will argue that as a front-line defence the innate immune response determines the threshold of infectivity that HIV-1 must overcome to establish a productive infection.
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Affiliation(s)
- C Tomescu
- The Wistar Institute, HIV Immunopathogenesis Laboratory, Philadelphia, PA, USA
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Pala P, Gomez-Roman VR, Gilmour J, Kaleebu P. An African perspective on mucosal immunity and HIV-1. Mucosal Immunol 2009; 2:300-14. [PMID: 19421180 DOI: 10.1038/mi.2009.23] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
HIV prevention mandates an understanding of the mechanisms of mucosal immunity with attention to some unique features of the epidemic and mucosal environment in the developing world. An effective vaccine will have to induce mucosal protection against a highly diverse virus, which is equipped with a number of immune evasion strategies. Its development will require assessment of mucosal immune responses, and it will have to protect a mucosal environment where inflammation and altered immune responses are common because of the presence of other mucosal infections, such as sexually transmitted infections and parasites, and where nutritional status may also be compromised. Ideally, not only prevention methods would protect adults but also provide cover against gastrointestinal transmission through maternal milk. Prevention might also be complemented by microbicides and circumcision, two alternative approaches to mucosal protection. It seems unlikely that a single solution will work in all instances and intervention might have to act at multiple levels and be tailored to local circumstances. We review here some of the mucosal events associated with HIV infection that are most relevant in an African setting.
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Affiliation(s)
- P Pala
- Medical Research Council-Uganda Virus Research Institute, Entebbe, Uganda
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15
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Ding J, Chou YY, Chang TL. Defensins in viral infections. J Innate Immun 2009; 1:413-20. [PMID: 20375599 DOI: 10.1159/000226256] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2009] [Accepted: 05/05/2009] [Indexed: 12/20/2022] Open
Abstract
Defensins are antimicrobial peptides important to innate host defense. In addition to their direct antimicrobial effect, defensins modulate immune responses. Increasing evidence indicates that defensins exhibit complex functions by positively or negatively modulating infections of both enveloped and non-enveloped viruses. The effects of defensins on viral infections appear to be specific to the defensin, virus and target cell. Regulation of viral infection by defensins is achieved by multiple mechanisms. This review focuses on the interplay between defensins and viral infections, the mechanisms of action of defensins and the in vivo studies of the role of defensins in viral infections.
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Affiliation(s)
- Jian Ding
- Department of Medicine, Division of Infectious Diseases, Mount Sinai School of Medicine, New York University, New York, NY 10029, USA
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Innate Factors in Human Breast Milk Inhibit Cell-Free HIV-1 but Not Cell-Associated HIV-1 Infection of CD4+ Cells. J Acquir Immune Defic Syndr 2009; 51:117-24. [DOI: 10.1097/qai.0b013e3181a3908d] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Koch AL. Stone age diseases and modern AIDS. Virol J 2008; 5:93. [PMID: 18687115 PMCID: PMC2531097 DOI: 10.1186/1743-422x-5-93] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2008] [Accepted: 08/07/2008] [Indexed: 11/10/2022] Open
Abstract
The great advantage of being a sexually transmitted disease is the ability to survive and specialize solely on a host species that is present in low numbers and widely distributed so that contact between infected and uninfected organisms by chance is rare. Pathogens of a sparse, but widely distributed host species, must either: i) have an alternative host; ii) be able to survive in a dormant state; or iii) be non-destructive to their host. For the pathogens of a diploid there is a particularly effective strategy, that of being sexually transmitted. Then the hosts' themselves transfer the pathogen.
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Affiliation(s)
- Arthur L Koch
- Biology Department, Indiana University, Bloomington, IN 47405-6801, USA.
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Tumor Necrosis Factor-α, Interleukin-10, and α-Defensins in Plasma and Breast Milk of HIV-Infected Highly Active Antiretroviral Therapy-Treated and Untreated Pregnant Women in Mozambique. J Acquir Immune Defic Syndr 2008; 47:647-9. [DOI: 10.1097/qai.0b013e31815f3c4c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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