Lactoferrin-like Immunoreactivity in Distinct Neuronal Populations in the Mouse Central Nervous System

Published on Apr 1, 2021in Acta Medica Okayama0.642
· DOI :10.18926/AMO/61894
Shigeyoshi Shimaoka , Hitomi Hamaoka3
Estimated H-index: 3
+ 3 AuthorsYoichi Kondo (Shiga University of Medical Science)
Lactoferrin (Lf) is an iron-binding glycoprotein mainly found in exocrine secretions and the secondary granules of neutrophils. In the central nervous system (CNS), expression of the Lf protein has been reported in the lesions of some neurodegenerative disorders such as Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis, as well as in the aged brain. Lf is primarily considered an iron chelator, protecting cells from potentially toxic iron or iron-requiring microorganisms. Other biological functions of Lf include immunomodulation and transcriptional regulation. However, the roles of Lf in the CNS have yet to be fully clarified. In this study, we raised an antiserum against mouse Lf and investigated the immunohistochemical localization of Lf-like immunoreactivity (Lf-LI) throughout the CNS of adult mice. Lf-LI was found in some neuronal populations throughout the CNS. Intense labeling was found in neurons in the olfactory systems, hypothalamic nuclei, entorhinal cortex, and a variety of brainstem nuclei. This study provides detailed information on the Lf-LI distribution in the CNS, and the findings should promote further understanding of both the physiological and pathological significance of Lf in the CNS.
#1Jiaping Zheng (Fujian Medical University)H-Index: 2
#2Yunzhen Xie (Fujian Medical University)H-Index: 3
Last. Zhou Chen (Fujian Medical University)H-Index: 8
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Abstract Lactoferrin (LF) has been shown to be effective in attenuating some aging-related changes, although its potential in alleviating aging-related cognitive decline remains to be clarified. In this study, we evaluated the effects of LF (2000 mg/kg/day for 3 months) on the cognitive ability of 16-month-old C57/BL6J mice. Spatial cognition was improved in aged mice after LF administration, with more pyramidal cells detected in the hippocampi, and more regular distribution. LF also reduced iro...
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#1Erwann RousseauH-Index: 2
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Previous studies on postmortem human brain tissue have shown that the iron-binding glycoprotein lactoferrin is upregulated in dopamine (DA) neurons resistant to degeneration in Parkinson disease (PD). To study how this could possibly relate to disease progression, we used midbrain cultures and experimental settings that model the progressive loss of DA neurons in this disorder. Human lactoferrin of either recombinant or natural origin provided robust protection to vulnerable DA neurons in a cult...
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#1H J Vogel (U of C: University of Calgary)
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Lactoferrin is an abundant iron-binding protein in milk. This 80 kDa bilobal glycoprotein is also present in sev- eral other secreted bodily fluids, as well as in the secondary granules of neutrophils. The potent iron-binding properties of lactoferrin can locally create iron deficiency, and this is an important factor in host defense as it prevents bacteria from growing and forming biofilms. In addition to having antibacterial activity, lactoferrin is now known to have a long list of other benef...
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Delta-lactoferrin (ΔLf) is a transcription factor of which the expression is downregulated in cancer. It is a healthy tissue marker and a high expression level of its transcripts was correlated with a good prognosis in breast cancer. ΔLf results from alternative promoter usage of the hLf gene leading to the production of 2 isoforms with alternative N-termini: lactoferrin, which is secreted, and ΔLf, its nucleocytoplasmic counterpart. ΔLf possesses antiproliferative properties and induces cell cy...
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#1Michał Zimecki (PAN: Polish Academy of Sciences)H-Index: 29
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Lactoferrin (LF) is a multifunctional protein present in secretory fluids of mammals and circulating neutrophils. Beside anti-inflammatory properties, LF was found to inhibit some autoimmune disorders. In this investigation we studied effects of oral administration of LF on experimental autoimmune encephalomyelitis (EAE) in Lewis rats. LF was given in drinking water as 0.25% solution beginning the day of elicitation of EAE or with a seven-day delay. The effects of LF were evaluated by the follow...
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#1Yasushi A. Suzuki (UC Davis: University of California, Davis)H-Index: 8
#2Bo Lönnerdal (UC Davis: University of California, Davis)H-Index: 117
Lactoferrin (Lf) has been shown to have a role in the immune system and in early development of the mouse embryo. A specific receptor for Lf has been suggested to mediate the functions of Lf. We have recently identified a Lf receptor (LfR) in human fetal small intestine. We therefore hypothesized that the mouse homologue of this protein functions as a LfR. We expressed mouse Lf (MLf) and the mouse homologue (MLfR) in a baculovirus-insect cell system. The recombinant MLfR (rMLfR) was purified by ...
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#1Carine Fillebeen (CNRS: Centre national de la recherche scientifique)H-Index: 5
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