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  1. Article ; Online: OMIP-096: A 24-color flow cytometry panel to identify and characterize CD4+ and CD8+ tissue-resident T cells in human skin, intestinal, and type II mucosal tissue.

    O'Neil, Thomas R / Harman, Andrew N / Cunningham, Anthony L / Nasr, Najla / Bertram, Kirstie M

    Cytometry. Part A : the journal of the International Society for Analytical Cytology

    2023  Volume 103, Issue 11, Page(s) 851–856

    Abstract: There is a great need to understand human immune cells within tissue, where disease manifests and infection occurs. Tissue-resident memory T cells (TRMs) were discovered over a decade ago, there is a great need to understand their role in human disease. ... ...

    Abstract There is a great need to understand human immune cells within tissue, where disease manifests and infection occurs. Tissue-resident memory T cells (TRMs) were discovered over a decade ago, there is a great need to understand their role in human disease. We developed a 24-color flow cytometry panel to comprehensively interrogate CD4
    MeSH term(s) Female ; Humans ; Flow Cytometry ; CD8-Positive T-Lymphocytes ; Intestines ; CD4-Positive T-Lymphocytes ; Mucous Membrane ; Immunologic Memory
    Language English
    Publishing date 2023-09-29
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2099868-5
    ISSN 1552-4930 ; 0196-4763 ; 1552-4922
    ISSN (online) 1552-4930
    ISSN 0196-4763 ; 1552-4922
    DOI 10.1002/cyto.a.24782
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Defining the landscape of human epidermal mononuclear phagocytes.

    Bertram, Kirstie M / O'Neil, Thomas R / Vine, Erica E / Baharlou, Heeva / Cunningham, Anthony L / Harman, Andrew N

    Immunity

    2023  Volume 56, Issue 3, Page(s) 459–460

    MeSH term(s) Humans ; Dendritic Cells ; Epidermis ; Skin ; Langerhans Cells ; Phagocytes
    Language English
    Publishing date 2023-04-05
    Publishing country United States
    Document type Letter ; Comment
    ZDB-ID 1217235-2
    ISSN 1097-4180 ; 1074-7613
    ISSN (online) 1097-4180
    ISSN 1074-7613
    DOI 10.1016/j.immuni.2023.02.001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: HIV transmitting mononuclear phagocytes; integrating the old and new.

    Vine, Erica E / Rhodes, Jake W / Warner van Dijk, Freja A / Byrne, Scott N / Bertram, Kirstie M / Cunningham, Anthony L / Harman, Andrew N

    Mucosal immunology

    2022  Volume 15, Issue 4, Page(s) 542–550

    Abstract: In tissue, mononuclear phagocytes (MNP) are comprised of Langerhans cells, dendritic cells, macrophages and monocyte-derived cells. They are the first immune cells to encounter HIV during transmission and transmit the virus to CD4 T cells as a ... ...

    Abstract In tissue, mononuclear phagocytes (MNP) are comprised of Langerhans cells, dendritic cells, macrophages and monocyte-derived cells. They are the first immune cells to encounter HIV during transmission and transmit the virus to CD4 T cells as a consequence of their antigen presenting cell function. To understand the role these cells play in transmission, their phenotypic and functional characterisation is important. With advancements in high parameter single cell technologies, new MNPs subsets are continuously being discovered and their definition and classification is in a state of flux. This has important implications for our knowledge of HIV transmission, which requires a deeper understanding to design effective vaccines and better blocking strategies. Here we review the historical research of the role MNPs play in HIV transmission up to the present day and revaluate these studies in the context of our most recent understandings of the MNP system.
    MeSH term(s) CD4-Positive T-Lymphocytes ; Dendritic Cells ; HIV Infections ; Humans ; Langerhans Cells ; Macrophages ; Mononuclear Phagocyte System ; Phagocytes
    Language English
    Publishing date 2022-02-16
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2411370-0
    ISSN 1935-3456 ; 1933-0219
    ISSN (online) 1935-3456
    ISSN 1933-0219
    DOI 10.1038/s41385-022-00492-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: OMIP 082: A 25-color phenotyping to define human innate lymphoid cells, natural killer cells, mucosal-associated invariant T cells, and γδ T cells from freshly isolated human intestinal tissue.

    Doyle, Chloe M / Fewings, Nicole L / Ctercteko, Grahame / Byrne, Scott N / Harman, Andrew N / Bertram, Kirstie M

    Cytometry. Part A : the journal of the International Society for Analytical Cytology

    2022  Volume 101, Issue 3, Page(s) 196–202

    Abstract: We developed a 25-color flow cytometry panel to comprehensively interrogate innate lymphoid cells (ILC), mucosal-associated invariant T (MAIT) cells, natural killer (NK) cells and γδ T cells in human tissues. The ability to isolate and interrogate these ... ...

    Abstract We developed a 25-color flow cytometry panel to comprehensively interrogate innate lymphoid cells (ILC), mucosal-associated invariant T (MAIT) cells, natural killer (NK) cells and γδ T cells in human tissues. The ability to isolate and interrogate these cells from fresh human tissue is crucial in understanding the role these cells play at immune-privileged mucosal surfaces like the intestine in health and disease settings. However, liberating these cells from tissue is extremely challenging as many key surface identification markers are susceptible to enzymatic cleavage. Choosing the correct enzyme-antibody clone combination within a high-parameter panel is, therefore, a critical consideration. Here, we present a comprehensive, in-depth analysis of the effect different common digestive enzyme blends have on key surface markers used to identify these cell types. In addition, we compared multiple antibody clones for surface markers that are highly susceptible to enzymatic cleavage, such as CD127 and NKp44, to achieve the most consistent and superior staining patterns among donors.
    MeSH term(s) Biomarkers ; Flow Cytometry ; Humans ; Immunity, Innate ; Intestines ; Killer Cells, Natural ; Mucosal-Associated Invariant T Cells
    Chemical Substances Biomarkers
    Language English
    Publishing date 2022-01-12
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2099868-5
    ISSN 1552-4930 ; 0196-4763 ; 1552-4922
    ISSN (online) 1552-4930
    ISSN 0196-4763 ; 1552-4922
    DOI 10.1002/cyto.a.24529
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  5. Article ; Online: AFid: a tool for automated identification and exclusion of autofluorescent objects from microscopy images.

    Baharlou, Heeva / Canete, Nicolas P / Bertram, Kirstie M / Sandgren, Kerrie J / Cunningham, Anthony L / Harman, Andrew N / Patrick, Ellis

    Bioinformatics (Oxford, England)

    2020  Volume 37, Issue 4, Page(s) 559–567

    Abstract: Motivation: Autofluorescence is a long-standing problem that has hindered the analysis of images of tissues acquired by fluorescence microscopy. Current approaches to mitigate autofluorescence in tissue are lab-based and involve either chemical ... ...

    Abstract Motivation: Autofluorescence is a long-standing problem that has hindered the analysis of images of tissues acquired by fluorescence microscopy. Current approaches to mitigate autofluorescence in tissue are lab-based and involve either chemical treatment of sections or specialized instrumentation and software to 'unmix' autofluorescent signals. Importantly, these approaches are pre-emptive and there are currently no methods to deal with autofluorescence in acquired fluorescence microscopy images.
    Results: To address this, we developed Autofluorescence Identifier (AFid). AFid identifies autofluorescent pixels as discrete objects in multi-channel images post-acquisition. These objects can then be tagged for exclusion from downstream analysis. We validated AFid using images of FFPE human colorectal tissue stained for common immune markers. Further, we demonstrate its utility for image analysis where its implementation allows the accurate measurement of HIV-Dendritic cell interactions in a colorectal explant model of HIV transmission. Therefore, AFid represents a major leap forward in the extraction of useful data from images plagued by autofluorescence by offering an approach that is easily incorporated into existing workflows and that can be used with various samples, staining panels and image acquisition methods. We have implemented AFid in ImageJ, Matlab and R to accommodate the diverse image analysis community.
    Availability and implementation: AFid software is available at https://ellispatrick.github.io/AFid.
    Supplementary information: Supplementary data are available at Bioinformatics online.
    MeSH term(s) Histological Techniques ; Humans ; Image Processing, Computer-Assisted ; Microscopy, Fluorescence ; Software ; Workflow
    Language English
    Publishing date 2020-10-24
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1422668-6
    ISSN 1367-4811 ; 1367-4803
    ISSN (online) 1367-4811
    ISSN 1367-4803
    DOI 10.1093/bioinformatics/btaa780
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  6. Article ; Online: Herpes Simplex Virus type 1 infects Langerhans cells and the novel epidermal dendritic cell, Epi-cDC2s, via different entry pathways.

    Bertram, Kirstie M / Truong, Naomi R / Smith, Jacinta B / Kim, Min / Sandgren, Kerrie J / Feng, Konrad L / Herbert, Jason J / Rana, Hafsa / Danastas, Kevin / Miranda-Saksena, Monica / Rhodes, Jake W / Patrick, Ellis / Cohen, Ralph C / Lim, Jake / Merten, Steven L / Harman, Andrew N / Cunningham, Anthony L

    PLoS pathogens

    2021  Volume 17, Issue 4, Page(s) e1009536

    Abstract: Skin mononuclear phagocytes (MNPs) provide the first interactions of invading viruses with the immune system. In addition to Langerhans cells (LCs), we recently described a second epidermal MNP population, Epi-cDC2s, in human anogenital epidermis that is ...

    Abstract Skin mononuclear phagocytes (MNPs) provide the first interactions of invading viruses with the immune system. In addition to Langerhans cells (LCs), we recently described a second epidermal MNP population, Epi-cDC2s, in human anogenital epidermis that is closely related to dermal conventional dendritic cells type 2 (cDC2) and can be preferentially infected by HIV. Here we show that in epidermal explants topically infected with herpes simplex virus (HSV-1), both LCs and Epi-cDC2s interact with HSV-1 particles and infected keratinocytes. Isolated Epi-cDC2s support higher levels of infection than LCs in vitro, inhibited by acyclovir, but both MNP subtypes express similar levels of the HSV entry receptors nectin-1 and HVEM, and show similar levels of initial uptake. Using inhibitors of endosomal acidification, actin and cholesterol, we found that HSV-1 utilises different entry pathways in each cell type. HSV-1 predominantly infects LCs, and monocyte-derived MNPs, via a pH-dependent pathway. In contrast, Epi-cDC2s are mainly infected via a pH-independent pathway which may contribute to the enhanced infection of Epi-cDC2s. Both cells underwent apoptosis suggesting that Epi-cDC2s may follow the same dermal migration and uptake by dermal MNPs that we have previously shown for LCs. Thus, we hypothesize that the uptake of HSV and infection of Epi-cDC2s will stimulate immune responses via a different pathway to LCs, which in future may help guide HSV vaccine development and adjuvant targeting.
    MeSH term(s) Adolescent ; Animals ; Cells, Cultured ; Child ; Child, Preschool ; Chlorocebus aethiops ; Epidermis/pathology ; Epidermis/virology ; HaCaT Cells ; HeLa Cells ; Herpes Simplex/pathology ; Herpes Simplex/virology ; Herpesvirus 1, Human/physiology ; Humans ; Infant ; Langerhans Cells/virology ; Signal Transduction/physiology ; Vero Cells ; Virus Internalization
    Language English
    Publishing date 2021-04-27
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2205412-1
    ISSN 1553-7374 ; 1553-7366
    ISSN (online) 1553-7374
    ISSN 1553-7366
    DOI 10.1371/journal.ppat.1009536
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  7. Article ; Online: Optimal Isolation Protocols for Examining and Interrogating Mononuclear Phagocytes From Human Intestinal Tissue.

    Doyle, Chloe M / Vine, Erica E / Bertram, Kirstie M / Baharlou, Heeva / Rhodes, Jake W / Dervish, Suat / Gosselink, Martijn P / Di Re, Angelina / Collins, Geoffrey P / Reza, Faizur / Toh, James W T / Pathma-Nathan, Nimalan / Ahlenstiel, Golo / Ctercteko, Grahame / Cunningham, Anthony L / Harman, Andrew N / Byrne, Scott N

    Frontiers in immunology

    2021  Volume 12, Page(s) 727952

    Abstract: The human intestine contains numerous mononuclear phagocytes (MNP), including subsets of conventional dendritic cells (cDC), macrophages (Mf) and monocytes, each playing their own unique role within the intestinal immune system and homeostasis. The ... ...

    Abstract The human intestine contains numerous mononuclear phagocytes (MNP), including subsets of conventional dendritic cells (cDC), macrophages (Mf) and monocytes, each playing their own unique role within the intestinal immune system and homeostasis. The ability to isolate and interrogate MNPs from fresh human tissue is crucial if we are to understand the role of these cells in homeostasis, disease settings and immunotherapies. However, liberating these cells from tissue is problematic as many of the key surface identification markers they express are susceptible to enzymatic cleavage and they are highly susceptible to cell death. In addition, the extraction process triggers immunological activation/maturation which alters their functional phenotype. Identifying the evolving, complex and highly heterogenous repertoire of MNPs by flow cytometry therefore requires careful selection of digestive enzyme blends that liberate viable cells and preserve recognition epitopes involving careful selection of antibody clones to enable analysis and sorting for functional assays. Here we describe a method for the anatomical separation of mucosa and submucosa as well as isolating lymphoid follicles from human jejunum, ileum and colon. We also describe in detail the optimised enzyme digestion methods needed to acquire functionally immature and biologically functional intestinal MNPs. A comprehensive list of screened antibody clones is also presented which allows for the development of high parameter flow cytometry panels to discriminate all currently identified human tissue MNP subsets including pDCs, cDC1, cDC2 (langerin
    MeSH term(s) Biomarkers/metabolism ; Cell Separation ; Cells, Cultured ; Colon/cytology ; Cytokines/metabolism ; Dendritic Cells/immunology ; Dendritic Cells/metabolism ; Flow Cytometry ; Humans ; Ileum/cytology ; Intestinal Mucosa/cytology ; Jejunum/cytology ; Macrophages/immunology ; Macrophages/metabolism ; Monocytes/immunology ; Monocytes/metabolism ; Phagocytes/immunology ; Phagocytes/metabolism ; Phenotype
    Chemical Substances Biomarkers ; Cytokines
    Language English
    Publishing date 2021-09-01
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2021.727952
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  8. Article ; Online: An in situ analysis pipeline for initial host-pathogen interactions reveals signatures of human colorectal HIV transmission.

    Baharlou, Heeva / Canete, Nicolas / Vine, Erica E / Hu, Kevin / Yuan, Di / Sandgren, Kerrie J / Bertram, Kirstie M / Nasr, Najla / Rhodes, Jake W / Gosselink, Martijn P / Di Re, Angelina / Reza, Faizur / Ctercteko, Grahame / Pathma-Nathan, Nimalan / Collins, Geoff / Toh, James / Patrick, Ellis / Haniffa, Muzlifah A / Estes, Jacob D /
    Byrne, Scott N / Cunningham, Anthony L / Harman, Andrew N

    Cell reports

    2022  Volume 40, Issue 12, Page(s) 111385

    Abstract: The initial immune response to HIV determines transmission. However, due to technical limitations we still do not have a comparative map of early mucosal transmission events. By combining RNAscope, cyclic immunofluorescence, and image analysis tools, we ... ...

    Abstract The initial immune response to HIV determines transmission. However, due to technical limitations we still do not have a comparative map of early mucosal transmission events. By combining RNAscope, cyclic immunofluorescence, and image analysis tools, we quantify HIV transmission signatures in intact human colorectal explants within 2 h of topical exposure. We map HIV enrichment to mucosal dendritic cells (DCs) and submucosal macrophages, but not CD4
    MeSH term(s) CD4-Positive T-Lymphocytes ; Colorectal Neoplasms/pathology ; Dendritic Cells ; HIV Infections ; HIV-1 ; Host-Pathogen Interactions ; Humans
    Language English
    Publishing date 2022-09-06
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2649101-1
    ISSN 2211-1247 ; 2211-1247
    ISSN (online) 2211-1247
    ISSN 2211-1247
    DOI 10.1016/j.celrep.2022.111385
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  9. Article ; Online: Langerhans cells and sexual transmission of HIV and HSV.

    Botting, Rachel A / Rana, Hafsa / Bertram, Kirstie M / Rhodes, Jake W / Baharlou, Heeva / Nasr, Najla / Cunningham, Anthony L / Harman, Andrew N

    Reviews in medical virology

    2017  Volume 27, Issue 2

    Abstract: Langerhans cells (LCs) situated in stratified squamous epithelium of the skin and mucosal tissue are amongst the first cells that sexually transmitted pathogens encounter during transmission. They are potent antigen presenting cells and play a key role ... ...

    Abstract Langerhans cells (LCs) situated in stratified squamous epithelium of the skin and mucosal tissue are amongst the first cells that sexually transmitted pathogens encounter during transmission. They are potent antigen presenting cells and play a key role in the host mounting an appropriate immune response. As such, viruses have evolved complex strategies to manipulate these cells to facilitate successful transmission. One of best studied examples is HIV, which manipulates the natural function of these cells to interact with CD4 T cells, which are the main target cell for HIV in which rapid replication occurs. However, there is controversy in the literature as to the role that LCs play in this process. Langerhans cells also play a key role in the way the body mounts an immune response to HSV, and there is also a complex interplay between the transmission of HSV and HIV that involves LCs. In this article, we review both past and present literatures with a particular focus on a few very recent studies that shed new light on the role that LCs play in the transmission and immune response to these 2 pathogens.
    MeSH term(s) HIV Infections/transmission ; Herpes Genitalis/transmission ; Host-Pathogen Interactions ; Humans ; Langerhans Cells/immunology ; Langerhans Cells/virology
    Language English
    Publishing date 2017-03
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 1086043-5
    ISSN 1099-1654 ; 1052-9276
    ISSN (online) 1099-1654
    ISSN 1052-9276
    DOI 10.1002/rmv.1923
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  10. Article ; Online: Herpes simplex virus type 2-infected dendritic cells produce TNF-α, which enhances CCR5 expression and stimulates HIV production from adjacent infected cells.

    Marsden, Valerie / Donaghy, Heather / Bertram, Kirstie M / Harman, Andrew N / Nasr, Najla / Keoshkerian, Elizabeth / Merten, Steven / Lloyd, Andrew R / Cunningham, Anthony L

    Journal of immunology (Baltimore, Md. : 1950)

    2015  Volume 194, Issue 9, Page(s) 4438–4445

    Abstract: Prior HSV-2 infection enhances the acquisition of HIV-1 >3-fold. In genital herpes lesions, the superficial layers of stratified squamous epithelium are disrupted, allowing easier access of HIV-1 to Langerhans cells (LC) in the epidermis and perhaps even ...

    Abstract Prior HSV-2 infection enhances the acquisition of HIV-1 >3-fold. In genital herpes lesions, the superficial layers of stratified squamous epithelium are disrupted, allowing easier access of HIV-1 to Langerhans cells (LC) in the epidermis and perhaps even dendritic cells (DCs) in the outer dermis, as well as to lesion infiltrating activated T lymphocytes and macrophages. Therefore, we examined the effects of coinfection with HIV-1 and HSV-2 on monocyte-derived DCs (MDDC). With simultaneous coinfection, HSV-2 significantly stimulated HIV-1 DNA production 5-fold compared with HIV-1 infection alone. Because <1% of cells were dually infected, this was a field effect. Virus-stripped supernatants from HSV-2-infected MDDCs were shown to enhance HIV-1 infection, as measured by HIV-1-DNA and p24 Ag in MDDCs. Furthermore these supernatants markedly stimulated CCR5 expression on both MDDCs and LCs. TNF-α was by far the most prominent cytokine in the supernatant and also within HSV-2-infected MDDCs. HSV-2 infection of isolated immature epidermal LCs, but not keratinocytes, also produced TNF-α (and low levels of IFN-β). Neutralizing Ab to TNF-α and its receptor, TNF-R1, on MDDCs markedly inhibited the CCR5-stimulating effect of the supernatant. Therefore, these results suggest that HSV-2 infection of DCs in the skin during primary or recurrent genital herpes may enhance HIV-1 infection of adjacent DCs, thus contributing to acquisition of HIV-1 through herpetic lesions.
    MeSH term(s) Coinfection ; Culture Media, Conditioned/metabolism ; Cytokines/biosynthesis ; Dendritic Cells/immunology ; Dendritic Cells/metabolism ; Dendritic Cells/virology ; Gene Expression Regulation ; HIV Infections/genetics ; HIV Infections/immunology ; HIV Infections/metabolism ; HIV Infections/virology ; HIV-1/physiology ; Herpes Genitalis/genetics ; Herpes Genitalis/immunology ; Herpes Genitalis/metabolism ; Herpesvirus 2, Human/physiology ; Herpesvirus 2, Human/radiation effects ; Humans ; Models, Biological ; Receptors, CCR5/genetics ; Receptors, CCR5/metabolism ; Tumor Necrosis Factor-alpha/metabolism ; Up-Regulation ; Virus Replication
    Chemical Substances Culture Media, Conditioned ; Cytokines ; Receptors, CCR5 ; Tumor Necrosis Factor-alpha
    Language English
    Publishing date 2015-05-01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3056-9
    ISSN 1550-6606 ; 0022-1767 ; 1048-3233 ; 1047-7381
    ISSN (online) 1550-6606
    ISSN 0022-1767 ; 1048-3233 ; 1047-7381
    DOI 10.4049/jimmunol.1401706
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