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| Content Provider | PubMed Central |
|---|---|
| Author | Hiruma, Hiromi Hikawa, Shiori Kawakami, Tadashi |
| Copyright Year | 2012 |
| Abstract | Alveolar macrophages are known to express a variety of growth factors and neurotrophins. Fibroblast growth factor-1 (FGF-1) is abundantly present in the lung and has mitogenic and neurotrophic activities similarly to neurotrophins. In order to determine whether FGF-1 associates with neurotrophins in alveolar macrophages, we investigated the immunocytochemical colocalization of FGF-1 with neurotrophins, nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and neurotrophin-3 (NT-3), in mouse alveolar macrophages. The results showed that 34% of macrophages were immunoreactive for FGF-1, 10% for NGF, 9% for BDNF, and 17% for NT-3. Of FGF-1-immunoreactive (IR) macrophages, 16% were immunoreactive for NT-3, but only small percentages were immunoreactive for NGF (0.8%) and for BDNF (0.3%). FGF-1 and neurotrophins were all localized in the intracellular vesicles. In the vesicles, FGF-1 and NT-3 were frequently colocalized. All macrophages expressed lysosome-associated protein-2 (LAMP-2), a late endosomal and lysosomal marker, and early endosomes antigen 1 (EEA1), an early endosomal marker. FGF-1 and NT-3 were predominantly colocalized with LAMP-2 rather than with EEA1, whereas NGF and BDNF were colocalized with EEA1 rather than with LAMP-2. These results indicate that FGF-1 and NT-3 are substantially expressed in mouse alveolar macrophages and colocalized in vesicles, predominantly in late endosomes and lysosomes. |
| Related Links | http://dx.doi.org/10.1267/ahc.11055 |
| Ending Page | 137 |
| Page Count | 7 |
| Starting Page | 131 |
| File Format | |
| ISSN | 00445991 |
| e-ISSN | 13475800 |
| Journal | Acta Histochemica et Cytochemica |
| Issue Number | 2 |
| Volume Number | 45 |
| Language | English |
| Publisher | Japan Society of Histochemistry and Cytochemistry |
| Publisher Date | 2012-01-01 |
| Access Restriction | Open |
| Rights Holder | Japan Society of Histochemistry and Cytochemistry |
| Subject Keyword | Pathology and Forensic Medicine Cell Biology Biochemistry Physiology Histology Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Physiology Histology Biochemistry Pathology and Forensic Medicine |
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