The DOI matches its Crossref record; 181 of the 182 references it cites were found in a registry or an index.
Microglial Activation and Chronic Neurodegeneration
Open accessAbstract
Microglia, the resident innate immune cells in the brain, have long been implicated in the pathology of neurodegenerative diseases. Accumulating evidence points to activated microglia as a chronic source of multiple neurotoxic factors, including tumor necrosis factor-α, nitric oxide, interleukin-1β, and reactive oxygen species (ROS), driving progressive neuron damage. Microglia can become chronically activated by either a single stimulus (e.g., lipopolysaccharide or neuron damage) or multiple stimuli exposures to result in cumulative neuronal loss with time. Although the mechanisms driving these phenomena are just beginning to be understood, reactive microgliosis (the microglial response to neuron damage) and ROS have been implicated as key mechanisms of chronic and neurotoxic microglial activation, particularly in the case of Parkinson's disease. We review the mechanisms of neurotoxicity associated with chronic microglial activation and discuss the role of neuronal death and microglial ROS driving the chronic and toxic microglial phenotype.
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“MiRNAs can ameliorate degeneration by suppressing microglial activation in the brain and are therefore considered as a therapeutic approach for neurodegenerative diseases (Lull and Block 2010).”
From MiR-124 and MiR-155 as Therapeutic Targets in Microglia-Mediated Inflammation in Multiple Sclerosis (2025) · cites this paper as Lull and Block 2010
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“The notion that neuroinflammatory processes contribute to disease was once provocative, yet recent studies have uncovered multiple mechanisms by which aberrant gliosis causes detrimental neuroinflammation that can influence tau pathology and accelerate neurodegeneration.”
From Glial contributions to neurodegeneration in tauopathies (2017) · cites this paper as [6]
In the citing paper
“After this acute M1 activation, microglial cells can suffer an uncontrolled activation leading to a state of chronic inflammation. In this state, microglia release neurotoxic inflammatory factors (TNF-α, IL-1α, IL-1β, IL-6, NO, hydrogen peroxide, superoxide anion, chemokines, and glutamate), which lead to neuronal death (Block et al., 2007; Lull and Block, 2010; Burguillos et al., 2011; Kettenmann”
From The role of microglia in retinal neurodegeneration: Alzheimer’s disease, parkinson, and glaucoma. (2017) · cites this paper as Lull and Block, 2010
In the citing paper
“Neuroinflammation is a characteristic of neurodegenerative diseases, including PD, in which microglia confer pathogenic and exacerbating effects (Lull and Block, 2010; Zhao et al., 2020).”
From Mechanism of miR-132-3p Promoting Neuroinflammation and Dopaminergic Neurodegeneration in Parkinson’s Disease (2022) · cites this paper as Lull and Block, 2010
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Cites
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1 of the 182 references couldn’t be matched to a known paper.
Research works printed but not linked: 2
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“Activation of microglia leads to the release of inflammatory cytokines such as nitric oxide (NO), tumor necrosis factor (TNF)- α , and interleukin (IL)-1 β , characteristic markers of AD, PD, MS, and cerebral ischemia [6,10,11].”
Immune responses drive chorioretinitis and retinal pathology after neonatal CMV infection
McCord, J. L., Han, J. Y. S., Staudt, R. E., Philp, N. J., & Snyder, C. M. (2024) · Science Advances · doi:10.1126/sciadv.adn6379 · Cited by 5
Nassrallah, W. B., Li, H. R., Irani, L., Wijesinghe, P., Hogg, P. W., Hui, L., Oh, J., Mackenzie, I. R., Hirsch‐Reinshagen, V., Hsiung, G. R., et al. (2024) · Acta Neuropathologica Communications · doi:10.1186/s40478-024-01898-6 · Cited by 9
Tiwari, S. K., & Ginhoux, F. (2025) · hLife · doi:10.1016/j.hlife.2025.02.002 · Cited by 5
“…has increasingly elucidated the connections between microglial dysfunction and a spectrum of neuropsychiatric disorders, including schizophrenia, bipolar disorder, and autism, as well as neurodegenerative diseases such as Alzheimer ’ s disease (AD) and Parkinson ’ s disease (PD) [12,17,18].”
Zhang, X., Zhang, X., Yu, H., Wang, Y., Chen, J. C., Wang, Y., Yu, L., Zhu, G.-X., Cao, X., & Huang, S. (2021) · PubMed Central · doi:10.22038/ijbms.2020.49193.11263 · Cited by 5
“Microglial cells can be chronically activated by exposure to a single stimulus (such as lipopolysaccharide) or multiple stimuli for continuous stimulation, leading to the loss of neurons over time (17).”
BackgroundPanayotacopoulou, M. T., Papageorgiou, I. E., Pagida, M. A., Katsogridaki, A. E., Chrysanthou‐Piterou, M., Valous, N. A., Halama, N., Patsouris, E., & Konstantinidou, A. E. (2022) · Journal of Neuropathology & Experimental Neurology · doi:10.1093/jnen/nlab135 · Cited by 5
Liu, H., Hua, M., Zheng, Q. Y., Gao, Y., & Li, Z. (2023) · MedComm – Biomaterials and Applications · doi:10.1002/mba2.47 · Cited by 5
Tumors of the Central Nervous System
Suryadevara, R., Fadel, H., Michelhaugh, S. K., Mittal, S., & Parajuli, P. (2018) · Elsevier eBooks · doi:10.1016/b978-0-12-812218-1.00001-4 · Cited by 6
Babalola, K. T., Oyebanjo, O. T., Adekoya, V. A., Adeniyi, I. A., Ajayi, A. M., & Onasanwo, S. A. (2021) · Oriental Pharmacy and Experimental Medicine · doi:10.1007/s13596-021-00578-3 · Cited by 5
Jebali, A., Rashidi, M., Keikha, R., Daliri, K., & Outeiro, T. F. (2021) · Neurología · doi:10.1016/j.nrl.2021.08.002 · Cited by 5
Nguyen, N. M., Duong, M. T. H., Bui, B. P., Nguyen, P. L., Chen, X., Cho, J., & Ahn, H. (2022) · International Journal of Molecular Sciences · doi:10.3390/ijms231810590 · Cited by 5
Fan, J., Yu, M., Zhao, Y., Guan, Y., Li, Z., Pan, L., Feng, Q., Yao, J., & Sun, C. (2022) · Chemical Biology & Drug Design · doi:10.1111/cbdd.14193 · Cited by 5
“Moreover, upon inflammation, astrocytes release large amounts of ROS to trigger a series of immune response cascades (Lull & Block, 2007).”
BackgroundKaikai, N.-E., Ba-M’hamed, S., Ghanima, A., & Bennis, M. (2023) · Toxicology and Applied Pharmacology · doi:10.1016/j.taap.2023.116677 · Cited by 5
Oxidative Stress in Neurodegenerative Diseases
Alami, M., Fülöp, T., Boumezough, K., Khalil, A., Zerif, E., & Berrougui, H. (2024) · Springer eBooks · doi:10.1007/978-3-031-69962-7_4 · Cited by 6
Cilostazol attenuates kainic acid-induced hippocampal cell death
Park, Y.-S., Jin, Z. H., Jeong, E. A., Yi, C., Lee, J. Y., Park, I. S., & Roh, G. S. (2017) · Korean Journal of Physiology and Pharmacology · doi:10.4196/kjpp.2018.22.1.63 · Cited by 5
“KA systemic administration to rodents resulted in increased activation of glial cells, contributing to the progression of neurodegeneration through the production of inflammatory molecules, such as the iron-siderophore binding protein lipocalin-2 (LCN2) [10,11].”
BackgroundMinocycline protects neurons against glial cells-mediated bilirubin neurotoxicity
Zhou, C., Sun, R., Sun, C., Gu, M., Guo, C., Zhang, J., Du, Y., Gu, H., & Liu, Q. (2019) · Brain Research Bulletin · doi:10.1016/j.brainresbull.2019.11.005 · Cited by 5
“Glial activation is observed in many neurodegenerative disorders (Chen et al., 2010; Lull and Block, 2010) and usually mediated by free radicals (McGeer and McGeer, 1998; von Bernhardi et al.”
BackgroundKern, J. K., Geier, D. A., Homme, K. G., & Geier, M. R. (2020) · Acta Neurobiologiae Experimentalis · doi:10.21307/ane-2020-007 · Cited by 5
Li, J., Kim, K.-W., Oh, H., & Kim, Y. (2021) · Biological and Pharmaceutical Bulletin · doi:10.1248/bpb.b20-00871 · Cited by 5
Goins, J., Henkel, N., Coulibaly, A. P., & Isaacson, L. G. (2020) · Cellular and Molecular Neurobiology · doi:10.1007/s10571-020-00853-y · Cited by 6
“In these same images, microglia activation state was assessed by quantifying the number of Iba1+ cells exhibiting 0 or 3–4 primary processes, as activated microglia have shorter and thicker processes or retract their processes completely (Nimmerjahn et al. 2005; Blackbeard et al. 2007; Lull and Block 2010; Kettenmann…”
MethodGuo, Z., Zhong, S.-J., Bai, J.-P., Lang, X.-Y., Cao, M., Hu, Y., Qin, X., & Sun, Y. (2025) · Scientific Reports · doi:10.1038/s41598-025-05994-y · Cited by 4
Brain macrophages and pial fibroblasts promote inflammation in a hypomyelination model
Okuno, N., Yamamoto, S., Hamashima, T., Tung, D. S., Okita, N., Fujikawa, M., Kunisawa, T., Takakura, N., Fujimori, T., Mori, H., et al. (2025) · Acta Neuropathologica Communications · doi:10.1186/s40478-025-02063-3 · Cited by 6
“These data suggest that hypomyelinated cortical lesions were related to neuroinflammatory lesion-like changes, including aberrant vascular formation, glial activation, oxidative neuronal cell damage, and BBB leakage in the cortex of N-PRα-KO mice [33, 43, 47, 70, 100].”
Spinal Cord Injury and Ageing: The Role of Chronic Neuroinflammation
Wang, T., Zhang, Z., Liu, J., Zhang, L., Ni, Q., Sun, B., & Sun, J. (2025) · Aging and Disease · doi:10.14336/ad.2025.10630 · Cited by 4
“Activated glial cells secrete many pro-inflammatory cytokines (such as IL-1β, TNF - α, and IL - 6), significantly amplifying the inflammatory cascade by activating signalling pathways like NF-κB [14].”
Khan, E., Radwan, N., Ardah, M. T., Kitada, T., & Haque, M. E. (2025) · Frontiers in Cellular Neuroscience · doi:10.3389/fncel.2025.1624593 · Cited by 4
Akinluyi, E. T., Takahashi, K., Connolly, M. G., Poon, W. W., & Macauley, M. S. (2025) · ACS Chemical Neuroscience · doi:10.1021/acschemneuro.5c00805 · Cited by 5
Gao, C., Lin, Z., Chen, Y., Gan, R., Wang, K., He, X., & Han, H. (2025) · Neuropharmacology and Therapy · doi:10.15212/npt-2025-0015 · Cited by 5
“This shift can induce a detrimental, self-perpetuating primed state causing microglia to transition from a neuroprotective to a neurotoxic functional profile [6,7].”
Persistent microglial activation following neonatal CMV infection mediates neurodegeneration
McCord, J. L., Chatterjee, D., Han, J. Y. S., Scoles, D., Smeyne, R. J., Philp, N. J., & Snyder, C. M. (2026) · Science Advances · doi:10.1126/sciadv.adz1686 · Cited by 4
“Inflammatory and DAM have been linked to the development of pathology in neurodegenerative diseases ( 42, 52, 54, 57, 76 ).”
Konstantinou, G., & Warsh, J. J. (2026) · Neuroscience & Biobehavioral Reviews · doi:10.1016/j.neubiorev.2026.106658 · Cited by 6
Haque, A., Zaman, V., Drasites, K. P., Matzelle, D. D., Sawant, S., Vertegel, A. A., Varma, A. K., & Banik, N. L. (2024) · Neurochemical Research · doi:10.1007/s11064-024-04289-4 · Cited by 5
Filaferro, M., Avallone, R., Rustichelli, C., & Vitale, G. (2024) · Molecules · doi:10.3390/molecules29235718 · Cited by 4
“Although specific microglial products were not identified in this study, others have suggested that neurotoxic factors, such as superoxide, myeloperoxidase, prostaglandins, NO, glutamate, IL-1b, and TNFa, may play a role in causing toxicity to neuron-like cells under in vitro models [39,40].”
α-Phellandrene: A Promising Natural Remedy for Rotenone-Induced Parkinson's Disease
Kumar, R., Arora, S., Alam, S., Rashid, M., & Kumar, S. (2025) · Recent Advances in Food Nutrition & Agriculture · doi:10.2174/012772574x341801241218051720 · Cited by 4
Ross, A., Prowse, N. A., Zhang, H., Hayley, S. P., & Hongyu, S. (2025) · Frontiers in Cellular Neuroscience · doi:10.3389/fncel.2025.1627305 · Cited by 4
“Regardless of the disease origins, reactive microglia are present in virtually all PD brains and infiltrating peripheral immune cells often accompany this neuroinflammatory feature (Lull and Block, 2010; Sanchez-Guajardo et al., 2010).”
InfluentialLuo, T.-Y., Zhou, W., Xiang, G.-F., Zhang, Y., & Liu, Q. (2022) · Medicine · doi:10.1097/md.0000000000030448 · Cited by 3
Piper, J. A., Jansen, M. I., Broome, S. T., Rodgers, K. J., Musumeci, G., & Castorina, A. (2022) · Current Issues in Molecular Biology · doi:10.3390/cimb44100308 · Cited by 4
“Current evidence suggests that prolonged microglial polarisation may promote neuronal damage and aggravate oligodendroglial pathology, similar to what we see in neuroinflammatory diseases such as MS [17,18].”
BackgroundNADPH oxidase 4 inhibition is a complementary therapeutic strategy for spinal muscular atrophy
Khoury, M. E., Biondi, O., Bruneteau, G., Sapaly, D., Bendris, S., Bézier, C., Clerc, Z., Akar, E. A., Weill, L., Eid, A. A., et al. (2023) · Frontiers in Cellular Neuroscience · doi:10.3389/fncel.2023.1242828 · Cited by 4
“, 2020), thought to participate in neuron degeneration (Lull and Block, 2010; Hickman et al., 2018), we investigated whether NOX4 inhibition by GKT137831 could limit also the activation of the microglia in the spinal cord of severe type SMA-like mice.”
BackgroundGlial cells of the central and peripheral nervous systems: An overview of existing research
Haywood, R. E. (2024) · Journal of Applied Neurosciences · doi:10.4102/jan.v3i1.13 · Cited by 4
“Microglia mediate phagocytosis of cellular debris resulting from apoptosis and normal cell death and neural injury (Lull & Block, 2010).”
BackgroundAfees, O. J., Arietarhire, L. O., Soremekun, O. E., Olugbogi, E. A., Aribisala, P. O., Alege, P. E., Adeleke, S. O., Afolabi, T. O., & Sodipo, A. O. (2024) · In Silico Pharmacology · doi:10.1007/s40203-024-00243-y · Cited by 6
“Inflammation in tissue pathology indicates the long-term effects of inflammatory stimuli or a malfunction in the regular repair mechanisms, which may then result in the production of neurotoxic substances that worsen disease states (Lull et al. 2010; Sarma 2014).”
Postencephalitic Parkinsonism: Unique Pathological and Clinical Features—Preliminary Data
Strobel, S., Sian‐Hülsmann, J., Tappe, D., Jellinger, K. A., Riederer, P. F., & Monoranu, C. (2024) · Cells · doi:10.3390/cells13181511 · Cited by 5
“Additionally, microgliosis may induce an imbalance leading to a greater secretion of pro-inflammatory (such as tumor necrosis factor-α , interleukin-1 β ) than anti-inflammatory factors, resulting in chronic neuroinflammation [78].”
Background
Metadata
- Authors
- Lull, M. E., & Block, M. L.
- Affiliations
- Virginia Commonwealth University (US)
- Corresponding author
- Block, Michelle L.
- Venue
- Neurotherapeutics
- Publisher
- Elsevier BV
- Published
- 2010-10
- Volume
- 7
- Issue
- 4
- Pages
- 354-365
- ISSN
- 1878-7479 (ISSN-L)
- PMC
- PMC2951017
- OpenAlex
- W2050320551
- Cited by
- 1,047
- References
- 182
- Citations by year
- 2026: 50 · 2025: 112 · 2024: 94 · 2023: 60 · 2022: 84 · 2021: 95 · 2020: 84 · 2019: 78 · 2018: 83 · 2017: 76 · 2016: 73 · 2015: 43 · 2014: 38 · 2013: 28 · 2012: 30
- FWCI
- 14.71
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Neurotherapeutics (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Fisher Digital Publications (St. John Fisher College) (submittedVersion)
- Funders
- National Institutes of Health
- National Institute of Environmental Health Sciences (R01ES016951, R00ES01549)
- Topics
- Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
- Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
- Keywords
- microglial activation, neurodegeneration, reactive microgliosis, reactive oxygen species, neuroinflammation, neurotoxicity, Parkinson's disease, neuronal cell death, lipopolysaccharide, TNF-α, nitric oxide, IL-1β
- MeSH terms
- Animals, Chronic Disease, Dopamine, Humans, Models, Biological, Neurons, Oxidation-Reduction, Signal Transduction, Reactive Oxygen Species, Microglia, NADPH Oxidases, Neurodegenerative Diseases
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