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Leukemia inhibitory factor mRNA expression is upregulated in macrophages and olfactory receptor neurons after target ablation
Journal of neuroscience research, 2002-01, Vol.67 (2), p.246-254
Getchell, Thomas V.
Shah, Dharmen S.
Partin, James V.
Subhedar, Nishikant K.
Getchell, Marilyn L.
2002
Volltextzugriff (PDF)
Details
Autor(en) / Beteiligte
Getchell, Thomas V.
Shah, Dharmen S.
Partin, James V.
Subhedar, Nishikant K.
Getchell, Marilyn L.
Titel
Leukemia inhibitory factor mRNA expression is upregulated in macrophages and olfactory receptor neurons after target ablation
Ist Teil von
Journal of neuroscience research, 2002-01, Vol.67 (2), p.246-254
Ort / Verlag
New York: John Wiley & Sons, Inc
Erscheinungsjahr
2002
Quelle
MEDLINE
Beschreibungen/Notizen
After target ablation by olfactory bulbectomy (OBX), the murine olfactory epithelium (OE) undergoes degenerative changes leading to apoptosis of olfactory receptor neurons (ORNs) followed by regenerative changes that include proliferation of progenitor cells leading to neurogenesis and ORN replacement. Macrophages recruited to the OE after OBX are involved in both the degenerative and regenerative processes. Relative quantitative RT‐PCR was used to demonstrate that within hours of OBX, mRNAs encoding three key components in the leukemia inhibitory factor (LIF) signaling pathway, including LIF, LIF receptor (LIFR), and STAT3, as well as cyclin D1, a growth factor sensor indicative of progenitor cell transformation, were upregulated. These mRNAs reached peak levels of expression on or before day 3 post‐OBX, coincident with the peak time for macrophage recruitment and progenitor cell proliferation. Cells expressing LIF mRNA in the OE of mice at 3 days post‐OBX, the time point at which LIF mRNA expression peaked, were identified using non‐isotopic in situ hybridization. LIF mRNA was localized in infiltrating macrophages; near‐adjacent sections exhibited macrophages immunoreactive for F4/80, a marker for activated macrophages, in numbers commensurate with those expressing LIF mRNA. LIF mRNA was also localized in surviving ORNs, identified by their expression of olfactory marker protein (OMP) mRNA and protein in near‐adjacent sections. Our data suggest that LIF functions as a mitogen originating from recruited macrophages through an intercellular signaling pathway that stimulates proliferation of progenitor cells leading to neurogenesis and regeneration, and as an intracellular survival factor for traumatized ORNs. © 2002 Wiley‐Liss, Inc.
Sprache
Englisch
Identifikatoren
ISSN: 0360-4012
eISSN: 1097-4547
DOI: 10.1002/jnr.10090
Titel-ID: cdi_proquest_miscellaneous_71353135
Format
–
Schlagworte
Animals
,
Antigens, Differentiation - immunology
,
Antigens, Differentiation - metabolism
,
Axotomy
,
Cell Movement - physiology
,
Cyclin D1 - genetics
,
cytokines
,
DNA-Binding Proteins - genetics
,
Gene Expression Regulation - physiology
,
Growth Inhibitors - genetics
,
Immunohistochemistry
,
intercellular signaling
,
Interleukin-6
,
Leukemia Inhibitory Factor
,
Leukemia Inhibitory Factor Receptor alpha Subunit
,
Lymphokines - genetics
,
Macrophages - cytology
,
Macrophages - metabolism
,
Male
,
Mice
,
Mice, Inbred C57BL
,
Nerve Regeneration - genetics
,
Olfactory Bulb - injuries
,
Olfactory Bulb - surgery
,
Olfactory Mucosa - cytology
,
Olfactory Mucosa - metabolism
,
olfactory progenitor cells
,
Olfactory Receptor Neurons - cytology
,
Olfactory Receptor Neurons - metabolism
,
olfactory regeneration
,
Phenotype
,
Receptors, Cytokine - genetics
,
Receptors, OSM-LIF
,
Retrograde Degeneration - metabolism
,
Retrograde Degeneration - physiopathology
,
RNA, Messenger - metabolism
,
Signal Transduction - genetics
,
STAT3 Transcription Factor
,
Stem Cells - cytology
,
Stem Cells - metabolism
,
Time Factors
,
Trans-Activators - genetics
,
Up-Regulation - genetics
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