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1.
HLA ; 103(6): e15509, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38837741

RESUMO

Loss of heterozygosity (LOH) has been reported to occur in HLA regions in cervical intraepithelial neoplasia (CIN) and cervical cancer. However, the details of how this is related to the progression of CIN have been unclear. In this study, we examined the human papillomavirus (HPV) antigen-presenting capacity of people with CIN and the significance of LOH of HLA class I in the progression of CIN. It was shown that differences in antigen-presenting capacity among each case depended on HLA types, not HPV genotypes. Focusing on the HLA type, there was a positive correlation between antigen-presenting capacity against HPV and the frequency of allelic loss. Furthermore, the lost HLA-B alleles had a higher HPV antigen-presenting capacity than intact alleles. In addition, frequency of LOH of HLA class I was significantly higher in advanced CIN (CIN2-3) than in cervicitis or early-stage CIN (CIN1): around half of CIN2-3 had LOH of any HLA class I. Moreover, the antigen-presenting capacity against E5, which is the HPV proteins that facilitate viral escape from this immune surveillance by suppressing HLA class I expression, had the most significant impact on the LOH in HLA-B. This study suggests that HPV evades immune surveillance mechanisms when host cells lose the capacity for antigen presentation by HLA class I molecules, resulting in long-term infection and progression to advanced lesions.


Assuntos
Antígenos de Histocompatibilidade Classe I , Perda de Heterozigosidade , Infecções por Papillomavirus , Displasia do Colo do Útero , Neoplasias do Colo do Útero , Humanos , Displasia do Colo do Útero/imunologia , Displasia do Colo do Útero/genética , Displasia do Colo do Útero/virologia , Displasia do Colo do Útero/patologia , Feminino , Neoplasias do Colo do Útero/imunologia , Neoplasias do Colo do Útero/genética , Antígenos de Histocompatibilidade Classe I/imunologia , Antígenos de Histocompatibilidade Classe I/genética , Infecções por Papillomavirus/imunologia , Infecções por Papillomavirus/genética , Apresentação de Antígeno/imunologia , Adulto , Alelos , Papillomaviridae/imunologia , Vigilância Imunológica , Pessoa de Meia-Idade , Genótipo
2.
Cancer Immunol Immunother ; 73(7): 130, 2024 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-38748254

RESUMO

Immune surveillance and chemotherapy sensitivity play critical functions in the tumorigenesis of breast cancer (BC). Emerging findings have indicated that circular RNA (circRNA) and N6-methyladenosine (m6A) both participate in the BC tumorigenesis. Here, present study aimed to investigate the roles of m6A-modified circATAD2 on BC and explore better understanding for BC precision therapeutic. Results reported that m6A-modifid circRNA (m6A-circRNA) microarray revealed the m6A-circRNA landscape in BC. M6A-modifid circATAD2 upregulated in BC samples and was closely correlated to poor prognosis. Functionally, circATAD2 promoted the immune evasion of BC cells and reduced the CD8+ T cells' killing effect. Mechanistically, MeRIP-seq unveiled the m6A modification in the 3'-UTR of PD-L1 mRNA, which was bound by circATAD2 and recognized by m6A reader IGF2BP3 to enhance PD-L1 mRNA stability and expression. In summary, these findings revealed the circATAD2/m6A/IGF2BP3/PD-L1 axis in BC immune surveillance, suggesting the potential that circATAD2 as a potential target for PD-L1-mediated BC.


Assuntos
Antígeno B7-H1 , Neoplasias da Mama , Linfócitos T CD8-Positivos , Vigilância Imunológica , RNA Circular , Proteínas de Ligação a RNA , Humanos , Neoplasias da Mama/imunologia , Neoplasias da Mama/genética , Feminino , Linfócitos T CD8-Positivos/imunologia , Linfócitos T CD8-Positivos/metabolismo , Antígeno B7-H1/metabolismo , Antígeno B7-H1/genética , RNA Circular/genética , Proteínas de Ligação a RNA/metabolismo , Proteínas de Ligação a RNA/genética , Adenosina/análogos & derivados , Adenosina/metabolismo , Animais , Regulação Neoplásica da Expressão Gênica , Camundongos , Prognóstico , Linhagem Celular Tumoral
3.
Viruses ; 16(5)2024 04 26.
Artigo em Inglês | MEDLINE | ID: mdl-38793562

RESUMO

The skin is a complex tissue that provides a strong physical barrier against invading pathogens. Despite this, many viruses can access the skin and successfully replicate in either the epidermal keratinocytes or dermal immune cells. In this review, we provide an overview of the antiviral T cell biology responding to cutaneous viral infections and how these responses differ depending on the cellular targets of infection. Much of our mechanistic understanding of T cell surveillance of cutaneous infection has been gained from murine models of poxvirus and herpesvirus infection. However, we also discuss other viral infections, including flaviviruses and papillomaviruses, in which the cutaneous T cell response has been less extensively studied. In addition to the mechanisms of successful T cell control of cutaneous viral infection, we highlight knowledge gaps and future directions with possible impact on human health.


Assuntos
Dermatopatias Virais , Pele , Linfócitos T , Humanos , Animais , Linfócitos T/imunologia , Dermatopatias Virais/imunologia , Dermatopatias Virais/virologia , Pele/virologia , Pele/imunologia , Camundongos , Vigilância Imunológica , Viroses/imunologia
4.
Science ; 384(6699): 961-962, 2024 May 31.
Artigo em Inglês | MEDLINE | ID: mdl-38815045

RESUMO

Germline-derived epitopes shape tumor development through immunoediting.


Assuntos
Neoplasias da Mama , Epitopos , Mutação em Linhagem Germinativa , Vigilância Imunológica , Animais , Humanos , Epitopos/imunologia
5.
Nat Immunol ; 25(5): 916-924, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38698238

RESUMO

B cells and T cells are important components of the adaptive immune system and mediate anticancer immunity. The T cell landscape in cancer is well characterized, but the contribution of B cells to anticancer immunosurveillance is less well explored. Here we show an integrative analysis of the B cell and T cell receptor repertoire from individuals with metastatic breast cancer and individuals with early breast cancer during neoadjuvant therapy. Using immune receptor, RNA and whole-exome sequencing, we show that both B cell and T cell responses seem to coevolve with the metastatic cancer genomes and mirror tumor mutational and neoantigen architecture. B cell clones associated with metastatic immunosurveillance and temporal persistence were more expanded and distinct from site-specific clones. B cell clonal immunosurveillance and temporal persistence are predictable from the clonal structure, with higher-centrality B cell antigen receptors more likely to be detected across multiple metastases or across time. This predictability was generalizable across other immune-mediated disorders. This work lays a foundation for prioritizing antibody sequences for therapeutic targeting in cancer.


Assuntos
Linfócitos B , Neoplasias da Mama , Vigilância Imunológica , Humanos , Feminino , Neoplasias da Mama/imunologia , Linfócitos B/imunologia , Receptores de Antígenos de Linfócitos T/genética , Receptores de Antígenos de Linfócitos T/imunologia , Receptores de Antígenos de Linfócitos T/metabolismo , Receptores de Antígenos de Linfócitos B/metabolismo , Receptores de Antígenos de Linfócitos B/genética , Receptores de Antígenos de Linfócitos B/imunologia , Linfócitos T/imunologia , Monitorização Imunológica , Sequenciamento do Exoma , Antígenos de Neoplasias/imunologia , Metástase Neoplásica , Células Clonais
6.
Nat Rev Cancer ; 24(6): 363-381, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38605228

RESUMO

Lymphatic transport maintains homeostatic health and is necessary for immune surveillance, and yet lymphatic growth is often associated with solid tumour development and dissemination. Although tumour-associated lymphatic remodelling and growth were initially presumed to simply expand a passive route for regional metastasis, emerging research puts lymphatic vessels and their active transport at the interface of metastasis, tumour-associated inflammation and systemic immune surveillance. Here, we discuss active mechanisms through which lymphatic vessels shape their transport function to influence peripheral tissue immunity and the current understanding of how tumour-associated lymphatic vessels may both augment and disrupt antitumour immune surveillance. We end by looking forward to emerging areas of interest in the field of cancer immunotherapy in which lymphatic vessels and their transport function are likely key players: the formation of tertiary lymphoid structures, immune surveillance in the central nervous system, the microbiome, obesity and ageing. The lessons learnt support a working framework that defines the lymphatic system as a key determinant of both local and systemic inflammatory networks and thereby a crucial player in the response to cancer immunotherapy.


Assuntos
Imunoterapia , Vasos Linfáticos , Neoplasias , Humanos , Vasos Linfáticos/imunologia , Neoplasias/terapia , Neoplasias/imunologia , Imunoterapia/métodos , Animais , Vigilância Imunológica , Microambiente Tumoral/imunologia , Estruturas Linfoides Terciárias/imunologia , Linfangiogênese
7.
Cancer Res Commun ; 4(5): 1189-1198, 2024 May 03.
Artigo em Inglês | MEDLINE | ID: mdl-38626334

RESUMO

Naïve T cells are key players in cancer immunosurveillance, even though their function declines during tumor progression. Thus, interventions capable of sustaining the quality and function of naïve T cells are needed to improve cancer immunoprevention.In this context, we studied the capacity of Urolithin-A (UroA), a potent mitophagy inducer, to enhance T cell-mediated cancer immunosurveillance.We discovered that UroA improved the cancer immune response by activating the transcription factor FOXO1 in CD8+ T cell. Sustained FOXO1 activation promoted the expression of the adhesion molecule L-selectin (CD62L) resulting in the expansion of the naïve T cells population. We found that UroA reduces FOXO1 phosphorylation favoring its nuclear localization and transcriptional activity. Overall, our findings determine FOXO1 as a novel molecular target of UroA in CD8+ T cells and indicate UroA as promising immunomodulator to improve cancer immunosurveillance. SIGNIFICANCE: Urolithin-A, a potent mitophagy inducer, emerges as a promising tool to enhance cancer immunosurveillance by activating the FOXO1 transcription factor in CD8+ T cells. This activation promotes the expansion of naïve T cells, offering a novel avenue for improving cancer immune response and highlighting UroA as a potential immunomodulator for bolstering our body's defenses against cancer.


Assuntos
Linfócitos T CD8-Positivos , Cumarínicos , Proteína Forkhead Box O1 , Linfócitos T CD8-Positivos/imunologia , Linfócitos T CD8-Positivos/efeitos dos fármacos , Linfócitos T CD8-Positivos/metabolismo , Proteína Forkhead Box O1/metabolismo , Humanos , Animais , Cumarínicos/farmacologia , Camundongos , Neoplasias/imunologia , Neoplasias/metabolismo , Linhagem Celular Tumoral , Camundongos Endogâmicos C57BL , Vigilância Imunológica/efeitos dos fármacos , Monitorização Imunológica , Selectina L/metabolismo
8.
Cancer ; 130(13): 2272-2286, 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38644692

RESUMO

BACKGROUND: Long-term daily use of aspirin reduces incidence and mortality due to colorectal cancer (CRC). This study aimed to analyze the effect of aspirin on the tumor microenvironment, systemic immunity, and on the healthy mucosa surrounding cancer. METHODS: Patients with a diagnosis of CRC operated on from 2015 to 2019 were retrospectively analyzed (METACCRE cohort). Expression of mRNA of immune surveillance-related genes (PD-L1, CD80, CD86, HLA I, and HLA II) in CRC primary cells treated with aspirin were extracted from Gene Expression Omnibus-deposited public database (GSE76583). The experiment was replicated in cell lines. The mucosal immune microenvironment of a subgroup of patients participating in the IMMUNOREACT1 (ClinicalTrials.gov NCT04915326) project was analyzed with immunohistochemistry and flow cytometry. RESULTS: In the METACCRE Cohort, 12% of 238 patients analyzed were aspirin users. Nodal metastasis was significantly less frequent (p = .008) and tumor-infiltrating lymphocyte infiltration was higher (p = .02) among aspirin users. In the CRC primary cells and selected cell lines, CD80 mRNA expression was increased following aspirin treatment (p = .001). In the healthy mucosa surrounding rectal cancer, the ratio of CD8/CD3 and epithelial cells expressing CD80 was higher in aspirin users (p = .027 and p = .034, respectively). CONCLUSIONS: These data suggested that regular aspirin use may have an active role in enhancing immunosurveillance against CRC.


Assuntos
Aspirina , Neoplasias Colorretais , Vigilância Imunológica , Linfócitos do Interstício Tumoral , Microambiente Tumoral , Humanos , Aspirina/uso terapêutico , Neoplasias Colorretais/imunologia , Neoplasias Colorretais/patologia , Neoplasias Colorretais/genética , Feminino , Masculino , Microambiente Tumoral/imunologia , Idoso , Pessoa de Meia-Idade , Vigilância Imunológica/efeitos dos fármacos , Estudos Retrospectivos , Linfócitos do Interstício Tumoral/imunologia , Linfócitos do Interstício Tumoral/efeitos dos fármacos , Antígeno B7-1/metabolismo , Antígeno B7-1/genética , Antígeno B7-H1/metabolismo , Linhagem Celular Tumoral
9.
Immunol Rev ; 323(1): 150-163, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38506480

RESUMO

Cancer progression can be restrained by tumor-infiltrating lymphocytes in a process termed cancer immunosurveillance. Based on how lymphocytes are activated and recruited to the tumor tissue, cancer immunity is either pre-wired, in which innate lymphocytes and innate-like T cells are directly recruited to and activated in tumors following their differentiation in primary lymphoid organs; or priming-dependent, in which conventional adaptive T cells are first primed by cognate antigens in secondary lymphoid organs before homing to and reactivated in tumors. While priming-dependent cancer immunity has been a focus of cancer immunology research for decades, in part due to historical preconception of cancer theory and tumor model choice as well as clinical success of conventional adaptive T cell-directed therapeutic programs, recent studies have revealed that pre-wired cancer immunity mediated by tissue-resident type 1 innate lymphoid cells (ILC1s) and killer innate-like T cells (ILTCKs) is an integral component of the cancer immunosurveillance process. Herein we review the distinct ontogenies and cancer-sensing mechanisms of ILC1s and ILTCKs in murine genetic cancer models as well as the conspicuously conserved responses in human malignancies. How ILC1s and ILTCKs may be targeted to broaden the scope of cancer immunotherapy beyond conventional adaptive T cells is also discussed.


Assuntos
Imunidade Inata , Neoplasias , Humanos , Animais , Neoplasias/imunologia , Neoplasias/terapia , Linfócitos do Interstício Tumoral/imunologia , Linfócitos do Interstício Tumoral/metabolismo , Células Matadoras Naturais/imunologia , Vigilância Imunológica , Microambiente Tumoral/imunologia , Camundongos , Linfócitos/imunologia , Ativação Linfocitária/imunologia , Subpopulações de Linfócitos T/imunologia , Subpopulações de Linfócitos T/metabolismo
10.
J Clin Invest ; 134(9)2024 Mar 12.
Artigo em Inglês | MEDLINE | ID: mdl-38470479

RESUMO

CD4+ T cells survey and maintain immune homeostasis in the brain, yet their differentiation states and functional capabilities remain unclear. Our approach, combining single-cell transcriptomic analysis, ATAC-Seq, spatial transcriptomics, and flow cytometry, revealed a distinct subset of CCR7+ CD4+ T cells resembling lymph node central memory (TCM) cells. We observed chromatin accessibility at the CCR7, CD28, and BCL-6 loci, defining molecular features of TCM. Brain CCR7+ CD4+ T cells exhibited recall proliferation and interleukin-2 production ex vivo, showcasing their functional competence. We identified the skull bone marrow as a local niche for these cells alongside CNS border tissues. Sequestering TCM cells in lymph nodes using FTY720 led to reduced CCR7+ CD4+ T cell frequencies in the cerebrospinal fluid, accompanied by increased monocyte levels and soluble markers indicating immune activation. In macaques chronically infected with SIVCL757 and experiencing viral rebound due to cessation of antiretroviral therapy, a decrease in brain CCR7+ CD4+ T cells was observed, along with increased microglial activation and initiation of neurodegenerative pathways. Our findings highlight a role for CCR7+ CD4+ T cells in CNS immune surveillance, and their decline during chronic SIV highlights their responsiveness to neuroinflammation.


Assuntos
Encéfalo , Linfócitos T CD4-Positivos , Macaca mulatta , Receptores CCR7 , Síndrome de Imunodeficiência Adquirida dos Símios , Vírus da Imunodeficiência Símia , Animais , Síndrome de Imunodeficiência Adquirida dos Símios/imunologia , Síndrome de Imunodeficiência Adquirida dos Símios/tratamento farmacológico , Vírus da Imunodeficiência Símia/imunologia , Linfócitos T CD4-Positivos/imunologia , Receptores CCR7/genética , Receptores CCR7/metabolismo , Receptores CCR7/imunologia , Encéfalo/imunologia , Encéfalo/metabolismo , Encéfalo/virologia , Encéfalo/patologia , Doenças Neuroinflamatórias/imunologia , Doenças Neuroinflamatórias/patologia , Vigilância Imunológica
11.
Nat Commun ; 15(1): 2198, 2024 Mar 19.
Artigo em Inglês | MEDLINE | ID: mdl-38503727

RESUMO

Metastasis arises from disseminated tumour cells (DTCs) that are characterized by intrinsic phenotypic plasticity and the capability of seeding to secondary organs. DTCs can remain latent for years before giving rise to symptomatic overt metastasis. In this context, DTCs fluctuate between a quiescent and proliferative state in response to systemic and microenvironmental signals including immune-mediated surveillance. Despite its relevance, how intrinsic mechanisms sustain DTCs plasticity has not been addressed. By interrogating the epigenetic state of metastatic cells, we find that tumour progression is coupled with the activation of oncogenic enhancers that are organized in variable interconnected chromatin domains. This spatial chromatin context leads to the activation of a robust transcriptional response upon repeated exposure to retinoic acid (RA). We show that this adaptive mechanism sustains the quiescence of DTCs through the activation of the master regulator SOX9. Finally, we determine that RA-stimulated transcriptional memory increases the fitness of metastatic cells by supporting the escape of quiescent DTCs from NK-mediated immune surveillance. Overall, these findings highlight the contribution of oncogenic enhancers in establishing transcriptional memories as an adaptive mechanism to reinforce cancer dormancy and immune escape, thus amenable for therapeutic intervention.


Assuntos
Vigilância Imunológica , Sequências Reguladoras de Ácido Nucleico , Divisão Celular , Linhagem Celular Tumoral , Cromatina
12.
Semin Immunopathol ; 45(4-6): 521-532, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38411739

RESUMO

Epithelial cells, which are non-immune cells, not only function as a physical defence barrier but also continuously monitor and eliminate aberrant epithelial cells in their vicinity. In other words, it has become evident that epithelial cells possess immune cell-like functions. In fact, recent research has revealed that epithelial cells recognise the Major Histocompatibility Complex I (MHC-I) of aberrant cells as a mechanism for surveillance. This cellular defence mechanism of epithelial cells probably detects aberrant cells more promptly than the conventional immune response, making it a novel and primary biological defence. Furthermore, there is the potential for this new immune-like biological defence mechanism to establish innovative treatment for disease prevention, leading to increasing anticipation for its future medical applications. In this review, we aim to summarise the recognition and attack mechanisms of aberrant cells by epithelial cells in mammals, with a particular focus on the field of cancer. Additionally, we discuss the potential therapeutic applications of epithelial cell-based defence against cancer, including novel prophylactic treatment methods based on molecular mechanisms.


Assuntos
Células Epiteliais , Neoplasias , Humanos , Células Epiteliais/metabolismo , Células Epiteliais/imunologia , Animais , Neoplasias/imunologia , Neoplasias/metabolismo , Neoplasias/etiologia , Neoplasias/terapia , Neoplasias/patologia , Vigilância Imunológica , Antígenos de Histocompatibilidade Classe I/metabolismo , Antígenos de Histocompatibilidade Classe I/imunologia
13.
Biomater Adv ; 158: 213796, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38342024

RESUMO

Tumor metastasis and recurrence are principal reasons for the high mortality and poor prognosis of cancers. Inefficient engagement between T cell and tumor cell, as well as the universal existence of immune checkpoints, are important factors to the limited immunological surveillance of the immune systems to tumor cells. Herein, an immune engager based on engineered platelets with CD3 antibody modification (P-aCD3) was constructed to facilitate the contact between T cell and tumor cell via providing the anchoring sites of above two cells. Combined with the immune checkpoint blockade strategy, P-aCD3 effectively enhanced T cell mediated cytotoxicity and inhibited tumor recurrence and metastasis in mice melanoma postoperative model and breast cancer model, resulting in significantly prolonged survival of mice.


Assuntos
Melanoma , Animais , Camundongos , Melanoma/cirurgia , Plaquetas , Modelos Animais de Doenças , Existencialismo , Vigilância Imunológica
14.
Int J Mol Sci ; 25(3)2024 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-38339019

RESUMO

The advent of immune checkpoint inhibitors (ICIs) has represented a breakthrough in the treatment of many cancers, although a high number of patients fail to respond to ICIs, which is partially due to the ability of tumor cells to evade immune system surveillance. Non-coding microRNAs (miRNAs) have been shown to modulate the immune evasion of tumor cells, and there is thus growing interest in elucidating whether these miRNAs could be targetable or proposed as novel biomarkers for prognosis and treatment response to ICIs. We therefore performed an extensive literature analysis to evaluate the clinical utility of miRNAs with a confirmed direct relationship with treatment response to ICIs. As a result of this systematic review, we have stratified the miRNA landscape into (i) miRNAs whose levels directly modulate response to ICIs, (ii) miRNAs whose expression is modulated by ICIs, and (iii) miRNAs that directly elicit toxic effects or participate in immune-related adverse events (irAEs) caused by ICIs.


Assuntos
MicroRNAs , Neoplasias , Humanos , MicroRNAs/genética , Inibidores de Checkpoint Imunológico/farmacologia , Inibidores de Checkpoint Imunológico/uso terapêutico , Evasão da Resposta Imune , Vigilância Imunológica , Neoplasias/tratamento farmacológico , Neoplasias/genética
15.
Science ; 383(6685): eadi3808, 2024 Feb 23.
Artigo em Inglês | MEDLINE | ID: mdl-38386728

RESUMO

Cancer risk is influenced by inherited mutations, DNA replication errors, and environmental factors. However, the influence of genetic variation in immunosurveillance on cancer risk is not well understood. Leveraging population-level data from the UK Biobank and FinnGen, we show that heterozygosity at the human leukocyte antigen (HLA)-II loci is associated with reduced lung cancer risk in smokers. Fine-mapping implicated amino acid heterozygosity in the HLA-II peptide binding groove in reduced lung cancer risk, and single-cell analyses showed that smoking drives enrichment of proinflammatory lung macrophages and HLA-II+ epithelial cells. In lung cancer, widespread loss of HLA-II heterozygosity (LOH) favored loss of alleles with larger neopeptide repertoires. Thus, our findings nominate genetic variation in immunosurveillance as a critical risk factor for lung cancer.


Assuntos
Predisposição Genética para Doença , Antígenos de Histocompatibilidade Classe II , Vigilância Imunológica , Perda de Heterozigosidade , Neoplasias Pulmonares , Humanos , Antígenos de Histocompatibilidade Classe II/genética , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/imunologia , Macrófagos Alveolares/imunologia , Fatores de Risco , Fumar/imunologia , Vigilância Imunológica/genética , Pessoa de Meia-Idade , Idoso , Idoso de 80 Anos ou mais , Mapeamento Cromossômico , Polimorfismo de Nucleotídeo Único
16.
Cancer Discov ; 14(2): 208-210, 2024 Feb 08.
Artigo em Inglês | MEDLINE | ID: mdl-38327192

RESUMO

SUMMARY: MHC-I downregulation is correlated with immunotherapy resistance in PDAC, but efficient strategies to increase cell-surface MHC-I are still lacking. This study by Sang, Zhou, Chen, Yu, and colleagues identified inhibition of tumor-intrinsic RIPK2 as a pharmacologic target to block the degradation of MHC-I on tumor cells and improved PDAC responses to anti-PD-1 immunotherapy. See related article by Sang et al., p. 326 (1) .


Assuntos
Imunoterapia , Neoplasias Pancreáticas , Humanos , Vigilância Imunológica , Neoplasias Pancreáticas/tratamento farmacológico
18.
J Exp Med ; 221(2)2024 Feb 05.
Artigo em Inglês | MEDLINE | ID: mdl-38270593

RESUMO

Mural cells directly contact macrophages in the dural layer of the meninges to suppress pro-inflammatory phenotypes, including antigen presentation and lymphocyte differentiation. These mechanisms represent new targets for modulating CNS immune surveillance and pathological inflammation (Min et al. 2024. J. Exp. Med.https://doi.org/10.1084/jem.20230326).


Assuntos
Anti-Inflamatórios , Pintura , Humanos , Inflamação , Apresentação de Antígeno , Vigilância Imunológica
19.
Pathol Res Pract ; 254: 155120, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38280274

RESUMO

In the immunological surveillance against cancer, natural killer (NK) cells are essential effectors that help eradicate altered cells. The complex interactions that occur between NK cells and the tumor microenvironment (TME) are thoroughly examined in this review. The review examines how cytokine stimulation affects NK cell activation, focusing on the dynamic modulation of NK cell function within the TME. It looks at NK cell-related biomarkers such as PD-1/PD-L1, methylation HOXA9 (Homeobox A9), Stroma AReactive Invasion Front Areas (SARIFA), and NKG2A/HLA-E, providing critical information about prognosis and treatment outcomes. The changing landscape of immunotherapies-including checkpoint inhibitors, CAR-NK cells, and cytokine-based interventions-is examined in the context of enhancing NK cell activity. The review highlights the potential pathways for precision medicine going forward, focusing on customized immunotherapies based on unique biomarker profiles and investigating combination medicines to produce more robust anti-tumor responses.


Assuntos
Neoplasias , Microambiente Tumoral , Humanos , Vigilância Imunológica , Células Matadoras Naturais , Neoplasias/patologia , Citocinas/metabolismo
20.
Methods Mol Biol ; 2713: 171-181, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-37639123

RESUMO

Renal macrophages help maintain homeostasis, participate in tissue injury and repair, and play a vital role in immune surveillance [1-3]. Kidney macrophages can be broken down into two subsets, infiltrating macrophages, which can be further broken down into Ly6Chi and Ly6Clo cells, and kidney resident macrophages. While recent studies have shed light on the differing origins and niches of these cells, a more thorough understanding of kidney macrophage populations and how they may respond to various conditions is needed. This protocol describes how to efficiently isolate murine kidney macrophage populations for flow cytometry analysis.


Assuntos
Vigilância Imunológica , Rim , Animais , Camundongos , Citometria de Fluxo , Homeostase , Macrófagos
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