Certain parts of the human body possess immune privilege
Certain anatomical sites in the human body, such as the brain, eyes, testes, and placenta, are well-documented to possess immune privilege to protect vital tissues from inflammation and immune-mediated damage.
The retrieved literature consistently confirms that specific parts of the human body, classically including the brain, eyes, testes, and placenta, exhibit immune privilege. Multiple papers discuss the physiological mechanisms and evolutionary adaptations underlying these immune-privileged sites, supporting the claim without contradiction.
Routy JP, Routy B, Graziani GM, Mehraj V. The Kynurenine Pathway Is a Double-Edged Sword in Immune-Privileged Sites and in Cancer: Implications for Immunotherapy.. 2016. https://doi.org/10.4137/ijtr.s38355
The paper explicitly notes that the term 'immune privilege' describes the suppression of inflammatory responses within specific organs protected by anatomic barriers, such as the eyes, brain, placenta, and testes.
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Hill MA, Kwon JH, Gerry B, Hardy WA, Walkowiak OA, Kavarana MN, Nadig SN, Rajab TK. Immune Privilege of Heart Valves.. 2021. https://doi.org/10.3389/fimmu.2021.731361
This review highlights the eyes, brain, placenta, and testes as classical examples of immune-privileged sites that are evolutionarily adapted to protect vital tissues with limited regenerative capacity.
Taotao Li, Xia Wang, Ruirui Luo, Xuejiao An, Yong Zhang, Xingxu Zhao, Youji Ma. Integrating miRNA and mRNA Profiling to Assess the Potential miRNA–mRNA Modules Linked With Testicular Immune Homeostasis in Sheep. 2021. https://doi.org/10.3389/fvets.2021.647153
The study discusses the mammalian testes as a well-recognized immune-privileged organ that protects autoantigenic germ cells from systemic immune responses.
Pakravan N, Ghaffarinia A, Parvaneh S, Jalili C, Riazi-Rad F. Kinetics of T cell response in the testes and CNS during experimental autoimmune encephalomyelitis: Simultaneous blood-brain and -testis barrier permeability?. 2019. https://doi.org/10.22038/ijbms.2019.34510.8185
The article references the central nervous system, testes, and eyes as established immune-privileged sites.
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