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Product Description

The R6G9 monoclonal antibody reacts with mouse CCL5 (C-C Motif Chemokine Ligand 5) also referred to as RANTES. This antibody does not cross-react with other murine CCLs such as CCL2 (MCP1), CCL3 (MIP1α), CXCL9 (MIG), or CXCL10 (IP-10). CCL5 is an 8 kDa ligand protein that is expressed by endothelial cells, platelets, smooth muscle cells, T cells, and macrophages. CCL5 exhibits the greatest affinity for CCR5, and its other receptors include CCR1, CCR3, and CCR4. Given the widespread expression of these CCRs in various cell types, CCL5 serves as a chemoattractant for several immune cell types, including monocytes, mast cells, dendritic cells, natural killer cells, eosinophils, basophils, CD4 T cells, CD8 T cells, and B cells. In T cell biology, CCL5 regulates T-cell migration to inflammatory sites and T-cell differentiation through Th1 cell recruitment. CCL5 also facilitates the release of histamine from basophils and activates eosinophils. CCL5 acts as an agonist of the G protein-coupled receptor GPR75, thereby playing a role in neuron survival through activation of downstream signaling pathways involving the PI3K/AKT and MAP kinases, as well as insulin secretion by islet cells. Several reports documented that CCL5 plays protective roles following neuronal damage, including stroke (brain trauma) and Alzheimer's disease (AD). CCL5 also plays a role in reducing oxidative stress, neuroimmunology, regulating ATP generation and synaptic complex formation in hippocampal neurons, axon regeneration, and brain energy metabolism. In cancer, the CCL5-CCRs signaling influences both the growth of tumors and antitumor immune responses, thereby suggesting CCL5 as an attractive target for immune checkpoint blocking (ICI) experimental therapeutics research. The R6G9 monoclonal antibody has been documented for in vitro and in vivo neutralization of CCL5 in various experiments involving immunology, infections, neuroscience, and other research areas.

Specifications

Isotype Mouse IgG1, κ
Recommended Isotype Control(s) InVivoMAb mouse IgG1 isotype control, unknown specificity
Recommended Dilution Buffer InVivoPure pH 7.0 Dilution Buffer
Immunogen A synthetic peptide corresponding to amino acids 78-91 of mouse CCL5
Reported Applications in vivo neutralization of CCL5
in vitro neutralization of CCL5
Functional assay
ELISA
Formulation PBS, pH 7.0
Contains no stabilizers or preservatives
Endotoxin ≤1EU/mg (≤0.001EU/μg)
Determined by LAL assay
Purity ≥95%
Determined by SDS-PAGE
Sterility 0.2 µm filtration
Production Purified from cell culture supernatant in an animal-free facility
Purification Protein G
Molecular Weight 150 kDa
Storage The antibody solution should be stored at the stock concentration at 4°C. Do not freeze.
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Application References

  • in vivo neutralization of CCL5 in vitro neutralization of CCL5 ELISA
    Glass WG, Hickey MJ, Hardison JL, Liu MT, Manning JE, Lane TE (2004). "Antibody targeting of the CC chemokine ligand 5 results in diminished leukocyte infiltration into the central nervous system and reduced neurologic disease in a viral model of mul

    Intracerebral infection of mice with mouse hepatitis virus, a member of the Coronaviridae family, reproducibly results in an acute encephalomyelitis that progresses to a chronic demyelinating disease. The ensuing neuropathology during the chronic stage of disease is primarily immune mediated and similar to that of the human demyelinating disease multiple sclerosis. Secretion of chemokines within the CNS signals the infiltration of leukocytes, which results in destruction of white matter and neurological impairment. The CC chemokine ligand (CCL)5 is localized in white matter tracts undergoing demyelination, suggesting that this chemokine participates in the pathogenesis of disease by attracting inflammatory cells into the CNS. In this study, we administer a mAb directed against CCL5 to mice with established mouse hepatitis virus-induced demyelination and impaired motor skills. Anti-CCL5 treatment decreased T cell accumulation within the CNS based, in part, on viral Ag specificity, indicating the ability to differentially target select populations of T cells. In addition, administration of anti-CCL5 improved neurological function and significantly (p < or = 0.005) reduced the severity of demyelination and macrophage accumulation within the CNS. These results demonstrate that the severity of CNS disease can be reduced through the use of a neutralizing mAb directed against CCL5 in a viral model of demyelination.

  • in vivo neutralization of CCL5
    Dénes A, Humphreys N, Lane TE, Grencis R, Rothwell N (2010). "Chronic systemic infection exacerbates ischemic brain damage via a CCL5 (regulated on activation, normal T-cell expressed and secreted)-mediated proinflammatory response in mice" J Neurosc

    Infection and systemic inflammation are risk factors for cerebrovascular diseases and poststroke infections impair outcome in stroke patients, although the mechanisms of their contribution are mostly unknown. No preclinical studies have identified how chronic infection affects ischemic brain damage and which key inflammatory mediators are involved. We used a well established model of gut infection (Trichuris muris) to study how chronic infection contributes to brain injury. We show that, in mice, infection that leads to a chronic Th1-polarized immune response dramatically (60%) exacerbates brain damage caused by experimental stroke. Chronic Th1-type infection resulted in systemic upregulation of proinflammatory mediators and profoundly altered stroke-induced early (40 min to 4 h) and late (48 h) inflammation in the brain and peripheral tissues. Using the same infection, we show that a Th1-, but not Th2-polarized response augments brain injury by increasing the Th1 chemokine CCL5 [regulated on activation, normal T-cell expressed and secreted (RANTES)] systemically. This infection-associated response paralleled altered regulatory T-cell response, accelerated platelet aggregation in brain capillaries, and increased microvascular injury and matrix metalloproteinase activation after stroke. Antibody neutralization of RANTES reversed the effect of chronic infection on brain damage, microvascular MMP-9 activation, and cellular inflammatory response. Our results suggest that chronic infection exacerbates ischemic brain damage via a RANTES-mediated systemic inflammatory response, which leads to delayed resolution of inflammation and augmented microvascular injury in the brain.

  • in vivo neutralization of CCL5 in vitro neutralization of CCL5 Functional Assays
    Sullivan NL, Eickhoff CS, Zhang X, Giddings OK, Lane TE, Hoft DF (2011). "Importance of the CCR5-CCL5 axis for mucosal Trypanosoma cruzi protection and B cell activation" J Immunol 187(3):1358-68.

    Trypanosoma cruzi is an intracellular parasite and the causative agent of Chagas disease. Previous work has shown that the chemokine receptor CCR5 plays a role in systemic T. cruzi protection. We evaluated the importance of CCR5 and CCL5 for mucosal protection against natural oral and conjunctival T. cruzi challenges. T. cruzi-immune CCR5(-/-) and wild-type C57BL/6 mice were generated by repeated infectious challenges with T. cruzi. CCR5(-/-) and wild-type mice developed equivalent levels of cellular, humoral, and protective mucosal responses. However, CCR5(-/-)-immune mice produced increased levels of CCL5 in protected gastric tissues, suggesting compensatory signaling through additional receptors. Neutralization of CCL5 in CCR5(-/-)-immune mice resulted in decreased mucosal inflammatory responses, reduced T. cruzi-specific Ab-secreting cells, and significantly less mucosal T. cruzi protection, confirming an important role for CCL5 in optimal immune control of T. cruzi replication at the point of initial mucosal invasion. To investigate further the mechanism responsible for mucosal protection mediated by CCL5-CCR5 signaling, we evaluated the effects of CCL5 on B cells. CCL5 enhanced proliferation and IgM secretion in highly purified B cells triggered by suboptimal doses of LPS. In addition, neutralization of endogenous CCL5 inhibited B cell proliferation and IgM secretion during stimulation of highly purified B cells, indicating that B cell production of CCL5 has important autocrine effects. These findings demonstrate direct effects of CCL5 on B cells, with significant implications for the development of mucosal adjuvants, and further suggest that CCL5 may be important as a general B cell coactivator.

  • in vivo neutralization of CCL5
    Millward JM, Caruso M, Campbell IL, Gauldie J, Owens T (2007). "IFN-gamma-induced chemokines synergize with pertussis toxin to promote T cell entry to the central nervous system" J Immunol 178(12):8175-82.

    Inflammation of the CNS, which occurs during multiple sclerosis and experimental autoimmune encephalomyelitis, is characterized by increased levels of IFN-gamma, a cytokine not normally expressed in the CNS. To investigate the role of IFN-gamma in CNS, we used intrathecal injection of a replication-defective adenovirus encoding murine IFN-gamma (AdIFNgamma) to IFN-gamma-deficient (GKO) mice. This method resulted in stable, long-lived expression of IFN-gamma that could be detected in cerebrospinal fluid using ELISA and Luminex bead immunoassay. IFN-gamma induced expression in the CNS of message and protein for the chemokines CXCL10 and CCL5, to levels comparable to those seen during experimental autoimmune encephalomyelitis. Other chemokines (CXCL2, CCL2, CCL3) were not induced. Mice lacking the IFN-gammaR showed no response, and a control viral vector did not induce chemokine expression. Chemokine expression was predominantly localized to meningeal and ependymal cells, and was also seen in astrocytes and microglia. IFN-gamma-induced chemokine expression did not lead to inflammation. However, when pertussis toxin was given i.p. to mice infected with the IFN-gamma vector, there was a dramatic increase in the number of T lymphocytes detected in the CNS by flow cytometry. This increase in blood-derived immune cells in the CNS did not occur with pertussis toxin alone, and did not manifest as histologically detectable inflammatory pathology. These results show that IFN-gamma induces a characteristic glial chemokine response that by itself is insufficient to promote inflammation, and that IFN-gamma-induced CNS chemoattractant signals can synergize with a peripheral infectious stimulus to drive T cell entry into the CNS.

Product Citations

  • Leveraging glucan-induced trained immunity for the epigenetic and metabolic rewiring of macrophages to enhance colorectal cancer vaccine response.

    In Nat Commun on 28 January 2026 by Hamdan, F., Gandolfi, S., et al.

    PubMed

    Colorectal cancer (CRC) remains refractory to most immunotherapies, with cancer vaccines failing due to an immunosuppressive tumor microenvironment. Here, we show that β-glucan-induced trained immunity overcomes these barriers by reprogramming macrophages through H3K4me3-dependent epigenetic modifications and metabolic rewiring. In female mice vaccinated with peptide-coated adenovirus-based vaccine PeptiCrad, training enhances glycolysis with creatine metabolism sustaining CXCL9/10 production, enabling macrophages to recruit NK cells via CXCR3. In turn, NK cells produce CCL5, driving cDC1 infiltration and antigen presentation, which together amplify effector memory CD8⁺ T cell responses. Moreover, with human peripheral blood mononuclear cells and CRC patient-derived organoids, trained macrophages boost NK migration, antigen-specific T cell activation, and tumor killing. These findings highlight trained immunity as a powerful adjuvant to reinvigorate colorectal cancer vaccination.

  • Stage-specific roles of clonally expanded CD8+ T cells in regulating amyloid pathology in Alzheimer's disease models.

    In Nat Commun on 27 October 2025 by Ohyagi, M., Ito, M., et al.

    PubMed

    Clonally expanded CD8+ T cells may contribute to Alzheimer's disease (AD) pathology through interactions with brain-resident cells. However, the functional impact of AD-specific T cell receptor (TCR) clonotypes remains unclear. Here, we demonstrate that CD8+ T cells undergo clonal expansion in early-stage AD mouse models, AppNL-G-F and 5xFAD, and that their depletion reduces amyloid plaque accumulation. Expanded TCR-expressing CD8+ T cells preferentially infiltrate the brain, exacerbating plaque deposition. Moreover, brain-infiltrating CD8+ T cells impair microglial transition into disease-associated states, suppressing amyloid clearance via CCL5-CCR5 signaling. Pharmacological blockade of CCL5 attenuates amyloid deposition, whereas CCL5 administration aggravates pathology. Notably, T cell depletion at later disease stages exacerbates amyloid pathology, suggesting a temporal shift in their function. Early-stage CD8+ T cells exhibit cytotoxic and effector profiles, whereas late-stage cells acquire tissue-resident and exhausted phenotypes. This temporal switch-from pathogenic to protective roles-highlights the stage-specific contribution of CD8+ T cells to AD and their potential as therapeutic targets.

  • Astrocyte-derived CCL5-mediated CCR5+ neutrophil infiltration drives depression pathogenesis.

    In Sci Adv on 23 May 2025 by Yao, H., Jiang, S. Y., et al.

    PubMed

    Cross-talk between the nervous and immune systems is involved in neurological diseases. However, their potential interplay in depression has yet to be elucidated. Here, using single-cell RNA and neutrophil SMART RNA sequencing, we showed that CCR5+ neutrophils were significantly increased in patients with depression and preferentially migrated to the hippocampus in a mouse model of depression. Infiltrated neutrophils engulf neuronal spines and subsequently promote depressive symptoms in male mice. Furthermore, by genetic or pharmacologic disruption, we identified a chemotactic effect of the astrocyte-derived chemokine CCL5 on mediating the infiltration of CCR5+ neutrophils and behavioral disorders in male depressed mice. Our findings therefore highlight the critical role of neutrophils in depression pathogenesis and astrocytes in mediating the dysregulation of innate immune responses and suggest that inhibition of CCL5/CCR5-mediated neutrophil infiltration represents a potential therapeutic strategy for noninfectious brain diseases such as depression.

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