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| Content Provider | Springer Nature Link |
|---|---|
| Author | Kumar, Arun Hovland, Alicia R. Rosa, Francisco G. Cole, William C. Prasad, Judith E. Prasad, Kedar N. |
| Copyright Year | 2000 |
| Abstract | Cyclosporin A is routinely used in transplant therapy following allogeneic or xenogeneic tissue transplantation to prevent rejection. This immunosuppressive drug is also neurotoxic; however, its mechanisms of action for neurotoxicity are poorly understood. Undifferentiated and cyclic adenosine 3′, 5′-monophosphate (cAMP)-induced differentiated neuroblastoma (NB) cells were used as an experimental model to study the toxicity of cyclosporin A. Results showed that cyclosporin A promoted the outgrowth of neurites and inhibited the growth of undifferentiated NB cells. When cyclosporin A was added simultaneously with RO20-1724, an inhibitor of cyclic nucleotide phosphodiesterase, or with prostaglandin E$_{1}$, a stimulator of adenylate cyclase, it markedly enhanced the growth inhibitory and differentiation effects of these cAMP-stimulating agents. In addition, cyclosporin A added to cAMP-induced differentiated NB cells caused dose-dependent degeneration of these cells as evidenced by the vacuolization of cytoplasm and the fragmentation of nuclear and cytoplasmic materials; however, neurites remained intact. Cyclosporin A alone did not alter the intensity of cell immunostaining for ubiquitin or β-amyloid peptide (amino acids 1–14) (Aβ$_{1–14}$); however, it enhanced the intensity of staining for both ubiquitin and Aß in cells that were treated with cAMP-stimulating agents. The intensity of staining of amyloid precursor protein (amino acids 44–63) (APP$_{44–63}$) did not change in any treated group, suggesting that the increase in Aß staining is due to increased processing of APP to Aß. We propose that one of the mechanisms of cyclosporin A-induced neurotoxicity involves increased levels of Aß and ubiquitin. |
| Starting Page | 81 |
| Ending Page | 87 |
| Page Count | 7 |
| File Format | |
| ISSN | 10712690 |
| Journal | In Vitro Cellular & Developmental Biology - Animal |
| Volume Number | 36 |
| Issue Number | 2 |
| e-ISSN | 1543706X |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2000-01-01 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Cyclosporine A differentiated neuroblastoma cells undifferentiated neuroblastoma cells cAMP beta-amyloid ubiquitin degeneration Cell Biology Developmental Biology Animal Genetics and Genomics Animal Biochemistry Animal Physiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Developmental Biology Medicine |
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