Microglia statuses in Alzheimer’s disease and lessons from anti-tumor microglia

Microglia statuses in Alzheimer’s disease and lessons from anti-tumor microglia

Julia Y. Cai
1,2,3
,
Yellamandayya Vadlamudi
1
,
Praveen Agrawal
1,*
*Correspondence to: Praveen Agrawal, Department of Molecular Pharmacology, Montefiore Einstein Comprehensive Cancer Center (MECCC), Cancer Dormancy Institute (CDI), Albert Einstein College of Medicine, Bronx, NY 10461, USA. E-mail: praveen.agrawal@einsteinmed.edu
Geromedicine. 2026;2:202613. 10.70401/Geromedicine.2026.0033
Received: March 04, 2026Accepted: July 27, 2026Published: July 27, 2026
Tips Icon
This manuscript is made available in its unedited form to allow early access to the reported findings. Further editing will be completed before final publication. As such, the content may include errors, and standard legal disclaimers are applicable.

Abstract

Alzheimer’s disease (AD) and related dementias are closely associated with alterations in microglial states. These microglial changes occur in response to amyloid-β (Aβ) accumulation and aberrant tau phosphorylation and can either protect against or exacerbate AD progression, depending on factors such as disease stage, genetic background, and environmental influences. This review focuses on recent advances in understanding the protective functions and features of microglia during the early stages of AD, while highlighting the outstanding questions regarding how these protective states deteriorate and become dysfunctional as the disease progresses. Interestingly, epidemiological studies have suggested an inverse relationship between AD and cancer incidence, and in this context we provide a comparative analysis of microglial phenotypes in AD and cancer to speculate how insights from anti-tumor microglia may inspire new strategies for reprogramming microglia to combat AD and related dementias.

Keywords

Alzheimer’s disease, dementia, microglia, cancer, neuroimmune, therapeutics

References

  • 1. Ayyubova G. Dysfunctional microglia and tau pathology in Alzheimer’s disease. Rev Neurosci. 2023;34(4):443-458.
    [DOI]
  • 2. Süß P, Schlachetzki JCM. Microglia in Alzheimer’s disease. Curr Alzheimer Res. 2020;17(1):29-43.
    [DOI]
  • 3. Gao R, Wu H, Li Q, Zhao J. Roles of microglia in AD pathology. Curr Alzheimer Res. 2023;19(13):854-869.
    [DOI]
  • 4. Thériault P, ElAli A, Rivest S. The dynamics of monocytes and microglia in Alzheimer’s disease. Alzheimers Res Ther. 2015;7(1):41.
    [DOI]
  • 5. Streit WJ, Khoshbouei H, Bechmann I. Dystrophic microglia in late-onset Alzheimer’s disease. Glia. 2020;68(4):845-854.
    [DOI]
  • 6. Merighi S, Nigro M, Travagli A, Gessi S. Microglia and Alzheimer’s disease. Int J Mol Sci. 2022;23(21):12990.
    [DOI]
  • 7. Yeh FL, Hansen DV, Sheng M. TREM2, microglia, and neurodegenerative diseases. Trends Mol Med. 2017;23(6):512-533.
    [DOI]
  • 8. AmeliMojarad M, AmeliMojarad M. The neuroinflammatory role of microglia in Alzheimer’s disease and their associated therapeutic targets. CNS Neurosci Ther. 2024;30(7):e14856.
    [DOI]
  • 9. Ulland TK, Colonna M. TREM2 - a key player in microglial biology and Alzheimer disease. Nat Rev Neurol. 2018;14(11):667-675.
    [DOI] [PubMed]
  • 10. Batista AF, Khan KA, Papavergi MT, Lemere CA. The importance of complement-mediated immune signaling in Alzheimer’s disease pathogenesis. Int J Mol Sci. 2024;25(2):817.
    [DOI] [PubMed] [PMC]
  • 11. Gedam M, Zheng H. Complement C3aR signaling: Immune and metabolic modulation and its impact on Alzheimer’s disease. Eur J Immunol. 2024;54(8):e2350815.
    [DOI] [PubMed] [PMC]
  • 12. Dobri AM, Dudău M, Enciu AM, Hinescu ME. CD36 in Alzheimer’s disease: An overview of molecular mechanisms and therapeutic targeting. Neuroscience. 2021;453:301-311.
    [DOI] [PubMed]
  • 13. Wilkinson K, El Khoury J. Microglial scavenger receptors and their roles in the pathogenesis of Alzheimer’s disease. Int J Alzheimers Dis. 2012;2012:489456.
    [DOI]
  • 14. Casali BT, MacPherson KP, Reed-Geaghan EG, Landreth GE. Microglia depletion rapidly and reversibly alters amyloid pathology by modification of plaque compaction and morphologies. Neurobiol Dis. 2020;142:104956.
    [DOI] [PubMed] [PMC]
  • 15. Paolicelli RC, Jawaid A, Henstridge CM, Valeri A, Merlini M, Robinson JL, et al. TDP-43 depletion in microglia promotes amyloid clearance but also induces synapse loss. Neuron. 2017;95(2):297-308.e6.
    [DOI] [PubMed] [PMC]
  • 16. Daria A, Colombo A, Llovera G, Hampel H, Willem M, Liesz A, et al. Young microglia restore amyloid plaque clearance of aged microglia. EMBO J. 2017;36(5):583-603.
    [DOI] [PubMed] [PMC]
  • 17. Zhao R, Hu W, Tsai J, Li W, Gan WB. Microglia limit the expansion of β-amyloid plaques in a mouse model of Alzheimer’s disease. Mol Neurodegener. 2017;12(1):47.
    [DOI]
  • 18. Condello C, Yuan P, Schain A, Grutzendler J. Microglia constitute a barrier that prevents neurotoxic protofibrillar Aβ42 hotspots around plaques. Nat Commun. 2015;6:6176.
    [DOI] [PubMed] [PMC]
  • 19. Miao J, Ma H, Yang Y, Liao Y, Lin C, Zheng J, et al. Microglia in Alzheimer’s disease: Pathogenesis, mechanisms, and therapeutic potentials. Front Aging Neurosci. 2023;15:1201982.
    [DOI]
  • 20. Yang G, Xu X, Gao W, Wang X, Zhao Y, Xu Y, et al. Microglia-orchestrated neuroinflammation and synaptic remodeling: Roles of pro-inflammatory cytokines and receptors in neurodegeneration. Front Cell Neurosci. 2025;19:1700692.
    [DOI] [PubMed] [PMC]
  • 21. Zhao S, Umpierre AD, Wu LJ. Tuning neural circuits and behaviors by microglia in the adult brain. Trends Neurosci. 2024;47(3):181-194.
    [DOI] [PubMed] [PMC]
  • 22. Frosch M, Shimizu T, Wogram E, Amann L, Gruber L, Groisman AI, et al. Microglia-neuron crosstalk through Hex-GM2-MGL2 maintains brain homeostasis. Nature. 2025;646(8086):913-924.
    [DOI] [PubMed] [PMC]
  • 23. Sabogal-Guáqueta AM, Marmolejo-Garza A, de Pádua VP, Eggen B, Boddeke E, Dolga AM, et al. Microglia alterations in neurodegenerative diseases and their modeling with human induced pluripotent stem cell and other platforms. Prog Neurobiol. 2020;190:101805.
    [DOI] [PubMed]
  • 24. Araki T, Ikegaya Y, Koyama R. The effects of microglia- and astrocyte-derived factors on neurogenesis in health and disease. Eur J Neurosci. 2021;54(5):5880-5901.
    [DOI] [PubMed] [PMC]
  • 25. Wiens KR, Wasti N, Ulloa OO, Klegeris A. Diversity of microglia-derived molecules with neurotrophic properties that support neurons in the central nervous system and other tissues. Molecules. 2024;29(23):5525.
    [DOI] [PubMed] [PMC]
  • 26. Leng F, Edison P. Neuroinflammation and microglial activation in Alzheimer disease: Where do we go from here? Nat Rev Neurol. 2021;17(3):157-172.
    [DOI] [PubMed]
  • 27. Wang C, Zong S, Cui X, Wang X, Wu S, Wang L, et al. The effects of microglia-associated neuroinflammation on Alzheimer’s disease. Front Immunol. 2023;14:1117172.
    [DOI]
  • 28. Chen Y, Yu Y. Tau and neuroinflammation in Alzheimer’s disease: Interplay mechanisms and clinical translation. J Neuroinflammation. 2023;20(1):165.
    [DOI]
  • 29. Tang Y, Le W. Differential roles of M1 and M2 microglia in neurodegenerative diseases. Mol Neurobiol. 2016;53(2):1181-1194.
    [DOI]
  • 30. Jung ES, Choi H, Mook-Jung I. Decoding microglial immunometabolism: A new frontier in Alzheimer’s disease research. Mol Neurodegener. 2025;20(1):37.
    [DOI] [PubMed] [PMC]
  • 31. Shokr MM. Rewiring brain immunity: Targeting microglial metabolism for neuroprotection in neurodegenerative disorders. Metab Brain Dis. 2025;40(8):326.
    [DOI] [PubMed] [PMC]
  • 32. Keren-Shaul H, Spinrad A, Weiner A, Matcovitch-Natan O, Dvir-Szternfeld R, Ulland TK, et al. A unique microglia type associated with restricting development of Alzheimer’s disease. Cell. 2017;169(7):1276-1290.e17.
    [DOI] [PubMed]
  • 33. Deczkowska A, Keren-Shaul H, Weiner A, Colonna M, Schwartz M, Amit I, et al. Disease-associated microglia: A universal immune sensor of neurodegeneration. Cell. 2018;173(5):1073-1081.
    [DOI] [PubMed]
  • 34. Long H, Simmons A, Mayorga A, Burgess B, Nguyen T, Budda B, et al. Preclinical and first-in-human evaluation of AL002, a novel TREM2 agonistic antibody for Alzheimer’s disease. Alzheimers Res Ther. 2024;16(1):235.
    [DOI] [PubMed] [PMC]
  • 35. Ulland TK, Song WM, Huang SC, Ulrich JD, Sergushichev A, Beatty WL, et al. TREM2 maintains microglial metabolic fitness in Alzheimer’s disease. Cell. 2017;170(4):649-663.e13.
    [DOI] [PubMed] [PMC]
  • 36. Zheng H, Cheng B, Li Y, Li X, Chen X, Zhang YW, et al. TREM2 in Alzheimer’s disease: Microglial survival and energy metabolism. Front Aging Neurosci. 2018;10:395.
    [DOI] [PubMed] [PMC]
  • 37. Korvatska O, Leverenz JB, Jayadev S, McMillan P, Kurtz I, Guo X, et al. R47H variant of TREM2 associated with Alzheimer disease in a large late-onset family: Clinical, genetic, and neuropathological study. JAMA Neurol. 2015;72(8):920.
    [DOI]
  • 38. Tsui JSM, Au DM, Uhm H, Wong WW, Lo RMN, Jiang Y, et al. The TREM2 H157Y variant is associated with more severe neurodegeneration in Alzheimer’s disease and altered immune-related processes. Alzheimers Dement. 2025;21(9):e70586.
    [DOI] [PubMed] [PMC]
  • 39. Dijkstra JIR, Vermunt L, Venkatraghavan V, Ozhegov G, Coomans EM, Ossenkoppele R, et al. TREM2 risk variants and associated endophenotypes in Alzheimer’s disease. Alzheimers Res Ther. 2025;17(1):57.
    [DOI]
  • 40. Takalo M, Jeskanen H, Rolova T, Kervinen I, Hellén M, Heikkinen S, et al. The protective PLCγ2-P522R variant mitigates Alzheimer’s disease-associated pathologies by enhancing beneficial microglial functions. J Neuroinflammation. 2025;22(1):64.
    [DOI] [PubMed] [PMC]
  • 41. Ayata P, Crowley JM, Challman MF, Sahasrabuddhe V, Gratuze M, Werneburg S, et al. Lymphoid gene expression supports neuroprotective microglia function. Nature. 2025;648(8092):157-165.
    [DOI] [PubMed] [PMC]
  • 42. Maurya SK, Gupta S, Mishra R. Transcriptional and epigenetic regulation of microglia in maintenance of brain homeostasis and neurodegeneration. Front Mol Neurosci. 2022;15:1072046.
    [DOI] [PubMed] [PMC]
  • 43. Casali BT, Reed-Geaghan EG. Microglial function and regulation during development, homeostasis and Alzheimer’s disease. Cells. 2021;10(4):957.
    [DOI]
  • 44. Kann O, Almouhanna F, Chausse B. Interferon γ: A master cytokine in microglia-mediated neural network dysfunction and neurodegeneration. Trends Neurosci. 2022;45(12):913-927.
    [DOI] [PubMed]
  • 45. Yin Z, Herron S, Silveira S, Kleemann K, Gauthier C, Mallah D, et al. Identification of a protective microglial state mediated by miR-155 and interferon-γ signaling in a mouse model of Alzheimer’s disease. Nat Neurosci. 2023;26(7):1196-1207.
    [DOI]
  • 46. Wu X, Miller JA, Lee BTK, Wang Y, Ruedl C. Reducing microglial lipid load enhances β amyloid phagocytosis in an Alzheimer’s disease mouse model. Sci Adv. 2025;11(6):eadq6038.
    [DOI]
  • 47. Rim C, You MJ, Nahm M, Kwon MS. Emerging role of senescent microglia in brain aging-related neurodegenerative diseases. Transl Neurodegener. 2024;13(1):10.
    [DOI] [PubMed] [PMC]
  • 48. Malvaso A, Gatti A, Negro G, Calatozzolo C, Medici V, Poloni TE, et al. Microglial senescence and activation in healthy aging and Alzheimer’s disease: Systematic review and neuropathological scoring. Cells. 2023;12(24):2824.
    [DOI] [PubMed] [PMC]
  • 49. Lau V, Ramer L, Tremblay MÈ. An aging, pathology burden, and glial senescence build-up hypothesis for late onset Alzheimer’s disease. Nat Commun. 2023;14(1):1670.
    [DOI] [PubMed] [PMC]
  • 50. Hu Y, Fryatt GL, Ghorbani M, Obst J, Menassa DA, Martin-Estebane M, et al. Replicative senescence dictates the emergence of disease-associated microglia and contributes to Aβ pathology. Cell Rep. 2021;35(10):109228.
    [DOI] [PubMed] [PMC]
  • 51. Li B, Wang S, Kerman B, Hugo C, Shwab EK, Shu C, et al. Microglial states are susceptible to senescence and cholesterol dysregulation in Alzheimer’s disease. Aging Cell. 2025;24(10):e70189.
    [DOI] [PubMed] [PMC]
  • 52. Chen X, Holtzman DM. Emerging roles of innate and adaptive immunity in Alzheimer’s disease. Immunity. 2022;55(12):2236-2254.
    [DOI]
  • 53. Solé-Domènech S, Cruz DL, Capetillo-Zarate E, Maxfield FR. The endocytic pathway in microglia during health, aging and Alzheimer’s disease. Ageing Res Rev. 2016;32:89-103.
    [DOI] [PubMed] [PMC]
  • 54. Yuan C, Aierken A, Xie Z, Li N, Zhao J, Qing H, et al. The age-related microglial transformation in Alzheimer’s disease pathogenesis. Neurobiol Aging. 2020;92:82-91.
    [DOI] [PubMed]
  • 55. Bassil DT, Zheng B, Su B, Kafetsouli D, Udeh-Momoh C, Tzoulaki I, et al. Lower incidence of dementia following cancer diagnoses: Evidence from a large cohort and Mendelian randomization study. J Prev Alzheimers Dis. 2024;11(5):1397-1405.
    [DOI] [PubMed] [PMC]
  • 56. Zabłocka A, Kazana W, Sochocka M, Stańczykiewicz B, Janusz M, Leszek J, et al. Inverse correlation between Alzheimer’s disease and cancer: Short overview. Mol Neurobiol. 2021;58(12):6335-6349.
    [DOI] [PubMed] [PMC]
  • 57. Musicco M, Adorni F, Di Santo S, Prinelli F, Pettenati C, Caltagirone C, et al. Inverse occurrence of cancer and Alzheimer disease: A population-based incidence study. Neurology. 2013;81(4):322-328.
    [DOI]
  • 58. Li R, Peng L, Deng D, Li G, Wu S. Causal relationship between Alzheimer’s disease and prostate cancer: A bidirectional Mendelian randomization analysis. Front Endocrinol. 2024;15:1354528.
    [DOI] [PubMed] [PMC]
  • 59. Ganguli M. Cancer and dementia: It’s complicated. Alzheimer Dis Assoc Disord. 2015;29(2):177-182.
    [DOI]
  • 60. Yarchoan M, James BD, Shah RC, Arvanitakis Z, Wilson RS, Schneider J, et al. Association of cancer history with Alzheimer’s disease dementia and neuropathology. J Alzheimers Dis. 2017;56(2):699-706.
    [DOI]
  • 61. Aung KZ, Zin SS, Wu X, Myint ZW, Karanth S, Estus S, et al. Disentangling the inverse relationship between cancer and Alzheimer’s or Parkinson’s disease: A systematic review on Mendelian randomization studies. Neurobiol Dis. 2025;217:107190.
    [DOI]
  • 62. Jeong SM, Jung W, Cho H, Choi HL, Jeon KH, Nam KW, et al. Alzheimer disease in breast cancer survivors. JAMA Netw Open. 2025;8(6):e2516468.
    [DOI]
  • 63. Mezencev R, Chernoff YO. Risk of Alzheimer’s disease in cancer patients: Analysis of mortality data from the US SEER population-based registries. Cancers. 2020;12(4):796.
    [DOI] [PubMed] [PMC]
  • 64. Lachner C, Day GS, Camsari GB, Kouri N, Ertekin-Taner N, Boeve BF, et al. Cancer and vascular comorbidity effects on dementia risk and neuropathology in the oldest-old. J Alzheimers Dis. 2022;90(1):405-417.
    [DOI] [PubMed] [PMC]
  • 65. Karanth SD, Katsumata Y, Nelson PT, Fardo DW, McDowell JK, Schmitt FA, et al. Cancer diagnosis is associated with a lower burden of dementia and less Alzheimer’s-type neuropathology. Brain. 2022;145(7):2518-2527.
    [DOI] [PubMed] [PMC]
  • 66. Xia S, Chen H, Tang T. Risk of death from Alzheimer’s disease associated with brain tumor, glioma, and glioblastoma. J Alzheimers Dis. 2023;96(2):623-631.
    [DOI] [PubMed]
  • 67. Hayes-Larson E, Ackley SF, Zimmerman SC, Ospina-Romero M, Glymour MM, Graff RE, et al. The competing risk of death and selective survival cannot fully explain the inverse cancer-dementia association. Alzheimers Dement. 2020;16(12):1696-1703.
    [DOI] [PubMed] [PMC]
  • 68. Basak U, Sarkar T, Mukherjee S, Chakraborty S, Dutta A, Dutta S, et al. Tumor-associated macrophages: An effective player of the tumor microenvironment. Front Immunol. 2023;14:1295257.
    [DOI]
  • 69. Qin J, Ma Z, Chen X, Shu S. Microglia activation in central nervous system disorders: A review of recent mechanistic investigations and development efforts. Front Neurol. 2023;14:1103416.
    [DOI] [PubMed] [PMC]
  • 70. Tu H, Chu H, Guan S, Hao F, Xu N, Zhao Z, et al. The role of the M1/M2 microglia in the process from cancer pain to morphine tolerance. Tissue Cell. 2021;68:101438.
    [DOI] [PubMed]
  • 71. Afzal A, Afzal Z, Bizink S, Davis A, Makahleh S, Mohamed Y, et al. Phagocytosis checkpoints in glioblastoma: CD47 and beyond. Curr Issues Mol Biol. 2024;46(8):7795-7811.
    [DOI] [PubMed] [PMC]
  • 72. Sarkar S, Poon CC, Mirzaei R, Rawji KS, Hader W, Bose P, et al. Microglia induces Gas1 expression in human brain tumor-initiating cells to reduce tumorigenecity. Sci Rep. 2018;8(1):15286.
    [DOI]
  • 73. Tao JC, Yu D, Shao W, Zhou DR, Wang Y, Hou SQ, et al. Interactions between microglia and glioma in tumor microenvironment. Front Oncol. 2023;13:1236268.
    [DOI]
  • 74. Hambardzumyan D, Gutmann DH, Kettenmann H. The role of microglia and macrophages in glioma maintenance and progression. Nat Neurosci. 2016;19(1):20-27.
    [DOI]
  • 75. Yi MH, Lee J, Moon S, So E, Bang G, Moon KS, et al. Divergent crosstalk between microglia and T cells in brain cancers: Implications for novel therapeutic strategies. Biomedicines. 2025;13(1):216.
    [DOI]
  • 76. Ozga AJ, Chow MT, Luster AD. Chemokines and the immune response to cancer. Immunity. 2021;54(5):859-874.
    [DOI]
  • 77. Tu S, Lin X, Qiu J, Zhou J, Wang H, Hu S, et al. Crosstalk between tumor-associated microglia/macrophages and CD8-positive T cells plays a key role in glioblastoma. Front Immunol. 2021;12:650105.
    [DOI]
  • 78. Habibi MA, Nejati N, Najafi MB, Khodadadiyan A, Dashti M, Lorestani P, et al. Enhancing T cell infiltration in glioblastoma: A review article on challenges and therapeutic strategies. Cancer Treat Res Commun. 2025;45:100999.
    [DOI]
  • 79. Luo EY, Sugimura RR. Taming microglia: The promise of engineered microglia in treating neurological diseases. J Neuroinflammation. 2024;21(1):19.
    [DOI] [PubMed] [PMC]
  • 80. Lim J, Kang I, La J, Ku KB, Kang BH, Kim Y, et al. Harnessing type I interferon-mediated immunity to target malignant brain tumors. Front Immunol. 2023;14:1203929.
    [DOI] [PubMed] [PMC]
  • 81. Low JT, Brown MC, Reitman ZJ, Bernstock JD, Markert JM, Friedman GK, et al. Understanding and therapeutically exploiting cGAS/STING signaling in glioblastoma. J Clin Invest. 2024;134(2):e163452.
    [DOI] [PubMed] [PMC]
  • 82. Berger G, Knelson EH, Jimenez-Macias JL, Nowicki MO, Han S, Panagioti E, et al. STING activation promotes robust immune response and NK cell-mediated tumor regression in glioblastoma models. Proc Natl Acad Sci U S A. 2022;119(28):e2111003119.
    [DOI] [PubMed] [PMC]
  • 83. Chen J, Wu Q, Berglund AE, MacAulay RJ, Mulé JJ, Etame AB, et al. Tumor-associated macrophages in glioblastoma: Mechanisms of tumor progression and therapeutic strategies. Cells. 2025;14(18):1458.
    [DOI]
  • 84. Przystal JM, Becker H, Canjuga D, Tsiami F, Anderle N, Keller AL, et al. Targeting CSF1R alone or in combination with PD1 in experimental glioma. Cancers. 2021;13(10):2400.
    [DOI]
  • 85. Pennisi G, Valeri F, Burattini B, Bruzzaniti P, Sturiale CL, Talacchi A, et al. Targeting macrophages in glioblastoma: Current therapies and future directions. Cancers. 2025;17(16):2687.
    [DOI] [PubMed] [PMC]
  • 86. Evans KT, Blake K, Longworth A, Coburn MA, Insua-Rodríguez J, McMullen TP, et al. Microglia promote anti-tumour immunity and suppress breast cancer brain metastasis. Nat Cell Biol. 2023;25(12):1848-1859.
    [DOI] [PubMed] [PMC]
  • 87. Benbenishty A, Gadrich M, Cottarelli A, Lubart A, Kain D, Amer M, et al. Prophylactic TLR9 stimulation reduces brain metastasis through microglia activation. PLoS Biol. 2019;17(3):e2006859.
    [DOI] [PubMed] [PMC]
  • 88. Mayer MG, Fischer T. Microglia at the blood brain barrier in health and disease. Front Cell Neurosci. 2024;18:1360195.
    [DOI]
  • 89. Weng Y, Chen N, Zhang R, He J, Ding X, Cheng G, et al. An integral blood-brain barrier in adulthood relies on microglia-derived PDGFB. Brain Behav Immun. 2024;115:705-717.
    [DOI] [PubMed]
  • 90. Feng Y, Hu X, Zhang Y, Wang Y. The role of microglia in brain metastases: Mechanisms and strategies. Aging Dis. 2024;15(1):169.
    [DOI]
  • 91. Dong W, Sheng J, Cui JZM, Zhao H, Wong STC. Systems immunology insights into brain metastasis. Trends Immunol. 2024;45(11):903-916.
    [DOI]
  • 92. Linnerbauer M, Wheeler MA, Quintana FJ. Astrocyte crosstalk in CNS inflammation. Neuron. 2020;108(4):608-622.
    [DOI]
  • 93. Matejuk A, Ransohoff RM. Crosstalk between astrocytes and microglia: An overview. Front Immunol. 2020;11:1416.
    [DOI]
  • 94. Marschallinger J, Iram T, Zardeneta M, Lee SE, Lehallier B, Haney MS, et al. Lipid-droplet-accumulating microglia represent a dysfunctional and proinflammatory state in the aging brain. Nat Neurosci. 2020;23(2):194-208.
    [DOI]
  • 95. Ochocka N, Segit P, Walentynowicz KA, Wojnicki K, Cyranowski S, Swatler J, et al. Single-cell RNA sequencing reveals functional heterogeneity of glioma-associated brain macrophages. Nat Commun. 2021;12(1):1151.
    [DOI] [PubMed] [PMC]
  • 96. Friebel E, Kapolou K, Unger S, Núñez NG, Utz S, Rushing EJ, et al. Single-cell mapping of human brain cancer reveals tumor-specific instruction of tissue-invading leukocytes. Cell. 2020;181(7):1626-1642.e20.
    [DOI] [PubMed]
  • 97. Dhapola R, Hota SS, Sarma P, Bhattacharyya A, Medhi B, Reddy DH, et al. Recent advances in molecular pathways and therapeutic implications targeting neuroinflammation for Alzheimer’s disease. Inflammopharmacology. 2021;29(6):1669-1681.
    [DOI]
  • 98. Li Q, Wu Y, Chen J, Xuan A, Wang X. Microglia and immunotherapy in Alzheimer’s disease. Acta Neurol Scand. 2022;145(3):273-278.
    [DOI]
  • 99. Wang Z, Weaver DF. Microglia and microglial-based receptors in the pathogenesis and treatment of Alzheimer’s disease. Int Immunopharmacol. 2022;110:109070.
    [DOI] [PubMed]
  • 100. Neal ML, Fleming SM, Budge KM, Boyle AM, Kim C, Alam G, et al. Pharmacological inhibition of CSF1R by GW2580 reduces microglial proliferation and is protective against neuroinflammation and dopaminergic neurodegeneration. FASEB J. 2020;34(1):1679-1694.
    [DOI] [PubMed] [PMC]
  • 101. León-Rodríguez A, Grondona JM, Marín-Wong S, López-Aranda MF, López-Ávalos MD. Long-term reprogramming of primed microglia after moderate inhibition of CSF1R signaling. Glia. 2025;73(1):175-195.
    [DOI] [PubMed] [PMC]
  • 102. Fu AK, Hung KW, Yuen MY, Zhou X, Mak DS, Chan IC, et al. IL-33 ameliorates Alzheimer’s disease-like pathology and cognitive decline. Proc Natl Acad Sci U S A. 2016;113(19):E2705-E2713.
    [DOI] [PubMed] [PMC]
  • 103. Kiyota T, Okuyama S, Swan RJ, Jacobsen MT, Gendelman HE, Ikezu T, et al. CNS expression of anti-inflammatory cytokine interleukin-4 attenuates Alzheimer’s disease-like pathogenesis in APP + PS1 bigenic mice. FASEB J. 2010;24(8):3093-3102.
    [DOI] [PubMed] [PMC]
  • 104. Dionisio-Santos DA, Behrouzi A, Olschowka JA, O’Banion MK. Evaluating the effect of interleukin-4 in the 3xTg mouse model of Alzheimer’s disease. Front Neurosci. 2020;14:441.
    [DOI] [PubMed] [PMC]
  • 105. Chen JH, Ke KF, Lu JH, Qiu YH, Peng YP. Protection of TGF-β1 against neuroinflammation and neurodegeneration in Aβ1-42-induced Alzheimer’s disease model rats. PLoS One. 2015;10(2):e0116549.
    [DOI] [PubMed] [PMC]
  • 106. Pimenova AA, Herbinet M, Gupta I, Machlovi SI, Bowles KR, Marcora E, et al. Alzheimer’s-associated PU.1 expression levels regulate microglial inflammatory response. Neurobiol Dis. 2021;148:105217.
    [DOI]
  • 107. Wei Z, Pan X, Cui X, Zhang J, Dai X, Zeng Y, et al. PU.1 dictates β-amyloid-induced TREM2 expression upregulation in microglia in a transgenic model of Alzheimer’s disease. Front Aging Neurosci. 2025;17:1537388.
    [DOI]
  • 108. Baruch K, Deczkowska A, Rosenzweig N, Tsitsou-Kampeli A, Sharif AM, Matcovitch-Natan O, et al. PD-1 immune checkpoint blockade reduces pathology and improves memory in mouse models of Alzheimer’s disease. Nat Med. 2016;22(2):135-137.
    [DOI] [PubMed]
  • 109. Kummer MP, Ising C, Kummer C, Sarlus H, Griep A, Vieira-Saecker A, et al. Microglial PD-1 stimulation by astrocytic PD-L1 suppresses neuroinflammation and Alzheimer’s disease pathology. EMBO J. 2021;40(24):e108662.
    [DOI] [PubMed] [PMC]
  • 110. Weiskopf K. Cancer immunotherapy targeting the CD47/SIRPα axis. Eur J Cancer. 2017;76:100-109.
    [DOI]
  • 111. Hu W, Chen M, Lin Y, Zhang H, Sun L, Shao W, et al. Neuronal CD47 induces behavioral alterations and ameliorates microglial synaptic pruning in wild-type and Alzheimer’s mouse models. Cell Biosci. 2025;15(1):38.
    [DOI] [PubMed] [PMC]
  • 112. Elmore MR, Najafi AR, Koike MA, Dagher NN, Spangenberg EE, Rice RA, et al. Colony-stimulating factor 1 receptor signaling is necessary for microglia viability, unmasking a microglia progenitor cell in the adult brain. Neuron. 2014;82(2):380-397.
    [DOI] [PubMed] [PMC]
  • 113. Moeller A, Kurzrock R, Botta GP, Adashek JJ, Patel H, Lee S, et al. Challenges and prospects of CSF1R targeting for advanced malignancies. Am J Cancer Res. 2023;13(7):3257-3265.
    [PubMed] [PMC]
  • 114. Chung S, Jeong JH, Park JC, Han JW, Lee Y, Kim JI, et al. Blockade of STING activation alleviates microglial dysfunction and a broad spectrum of Alzheimer’s disease pathologies. Exp Mol Med. 2024;56(9):1936-1951.
    [DOI] [PubMed] [PMC]
  • 115. Microglial cGAS-STING links innate immunity and Alzheimer’s disease. Nat Aging. 2023;3(2):155-156.
    [DOI] [PubMed]
  • 116. Lau SF, Chen C, Fu WY, Qu JY, Cheung TH, Fu AKY, et al. IL-33-PU.1 transcriptome reprogramming drives functional state transition and clearance activity of microglia in Alzheimer’s disease. Cell Rep. 2020;31(3):107530.
    [DOI] [PubMed]
  • 117. He C, Chen B, Yang H, Zhou X. The dual role of microglia in Alzheimer’s disease: From immune regulation to pathological progression. Front Aging Neurosci. 2025;17:1554398.
    [DOI]
  • 118. Kleffman K, Levinson G, Rose IVL, Blumenberg LM, Shadaloey SAA, Dhabaria A, et al. Melanoma-secreted amyloid beta suppresses neuroinflammation and promotes brain metastasis. Cancer Discov. 2022;12(5):1314-1335.
    [DOI] [PubMed] [PMC]
  • 119. Chakrabarty P, Li A, Ceballos-Diaz C, Eddy JA, Funk CC, Moore B, et al. IL-10 alters immunoproteostasis in APP mice, increasing plaque burden and worsening cognitive behavior. Neuron. 2015;85(3):519-533.
    [DOI] [PubMed] [PMC]
  • 120. Guillot-Sestier MV, Doty KR, Gate D, Rodriguez J Jr, Leung BP, Rezai-Zadeh K, et al. Il10 deficiency rebalances innate immunity to mitigate Alzheimer-like pathology. Neuron. 2015;85(3):534-548.
    [DOI] [PubMed] [PMC]
  • 121. Khoo LT, Chen LY. Role of the cGAS-STING pathway in cancer development and oncotherapeutic approaches. EMBO Rep. 2018;19(12):e46935.
    [DOI] [PubMed] [PMC]
  • 122. Sulka KB, Carroll KA, Sawden M, Hopkins JW, Smolgovsky SA, Bayer AL, et al. Microglial STING is a central safeguard against neurological decline with age. Cell Rep. 2025;44(6):115749.
    [DOI] [PubMed]
  • 123. Riddell DR, Zhou H, Atchison K, Warwick HK, Atkinson PJ, Jefferson J, et al. Impact of apolipoprotein E (ApoE) polymorphism on brain ApoE levels. J Neurosci. 2008;28(45):11445-11453.
    [DOI]
  • 124. Lee S, Devanney NA, Golden LR, Smith CT, Schwartz JL, Walsh AE, et al. APOE modulates microglial immunometabolism in response to age, amyloid pathology, and inflammatory challenge. Cell Rep. 2023;42(3):112196.
    [DOI] [PubMed] [PMC]
  • 125. Zheng G, Xu M, Dong Z, Abdelrahman Z, Wang X. Meta-analysis reveals an inverse relationship between Alzheimer’s disease and cancer. Behav Brain Res. 2025;478:115327.
    [DOI] [PubMed]
  • 126. Ostendorf BN, Bilanovic J, Adaku N, Tafreshian KN, Tavora B, Vaughan RD, et al. Common germline variants of the human APOE gene modulate melanoma progression and survival. Nat Med. 2020;26(7):1048-1053.
    [DOI] [PubMed] [PMC]
  • 127. Caffarel MM, Braza MS. Microglia and metastases to the central nervous system: Victim, ravager, or something else? J Exp Clin Cancer Res. 2022;41(1):327.
    [DOI]
  • 128. Niesel K, Schulz M, Anthes J, Alekseeva T, Macas J, Salamero-Boix A, et al. The immune suppressive microenvironment affects efficacy of radio-immunotherapy in brain metastasis. EMBO Mol Med. 2021;13(5):e13412.
    [DOI] [PubMed] [PMC]

© The Author(s) 2026. This is an Open Access article licensed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, sharing, adaptation, distribution and reproduction in any medium or format, for any purpose, even commercially, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Publisher’s Note

Science Exploration remains a neutral stance on jurisdictional claims in published maps and institutional affiliations. The views expressed in this article are solely those of the author(s) and do not reflect the opinions of the Editors or the publisher.

Share And Cite

Science Exploration Style
Cai JY, Vadlamudi Y, Agrawal P. Microglia statuses in Alzheimer’s disease and lessons from anti-tumor microglia. Geromedicine. 2026;2:202613. https://doi.org/10.70401/Geromedicine.2026.0033

Submit a Manuscript
Author Instructions
Cite this Article
Export Citation
Article Metrics
0
View
0
Download
Cited
Article Updates
Citation Icon Get citation