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| Content Provider | Springer Nature : BioMed Central |
|---|---|
| Author | Leong, Matthew Dai, Tiane Tong, Lili Nast, Cynthia C. |
| Abstract | Background Karyomegalic interstitial nephritis (KIN) is a rare renal diagnosis associated with both genetic and medication etiologies. The primary gene associated with KIN is the FAN1 gene which encodes a protein responsible for DNA interstrand repair. Common medication triggers of KIN are chemotherapeutic agents, especially those which disrupt DNA structure such as carboplatin. Despite overlap between these mechanisms, it has not clearly been established if medication usage requires an underlying genetic predisposition for triggering KIN or if medications alone are sufficient. This ambiguous pathogenesis can make it difficult to appropriately assess risk of KIN development when starting patients on one of the known KIN-inducing therapies. Additionally, brentuximab vedotin, an antibody–drug conjugate directed against CD30, has not been previously implicated in KIN development. Case presentation. We present a 49-year-old woman previously diagnosed with metastatic Hodgkin’s lymphoma who was treated with doxorubicin, bleomycin, vinblastine, and dacarbazine, then 3 cycles of ifosfamide, carboplatin, etoposide, all of which were discontinued due to side effects. Following an episode of acute kidney injury, the serum creatinine was 1.09 mg/dL. She then received 2 doses of brentuximab, the serum creatinine rose, and the drug was discontinued. Kidney biopsy done 2 months after brentuximab and 5 months following ifosfamide therapies showed karyomegalic interstitial nephritis. Genetic evaluation showed no FAN1 gene mutations. The patient was started on pembrolizumab; no steroids were given due to concerns about interference with lymphoma immunotherapy. She remains with stable disease and stable chronic kidney disease. Conclusions This case presents a patient who developed KIN with a progressively rising serum creatinine after ifosfamide, carboplatin and brentuximab treatment. Although ifosfamide and carboplatin have known associations with the development of KIN, this case raises the possibility that brentuximab, which has a different mechanism of action, also may be associated with KIN. Additionally, the genetic findings demonstrate that drug-induced KIN can develop in the absence of FAN1 mutations, a finding not previously reported. |
| Related Links | https://bmcnephrol.biomedcentral.com/counter/pdf/10.1186/s12882-024-03689-6.pdf |
| Ending Page | 6 |
| Page Count | 6 |
| Starting Page | 1 |
| File Format | HTM / HTML |
| ISSN | 14712369 |
| DOI | 10.1186/s12882-024-03689-6 |
| Journal | BMC Nephrology |
| Issue Number | 1 |
| Volume Number | 25 |
| Language | English |
| Publisher | BioMed Central |
| Publisher Date | 2024-11-14 |
| Access Restriction | Open |
| Subject Keyword | Nephrology Internal Medicine FAN1 Karyomegalic interstitial nephritis Brentuximab |
| Content Type | Text |
| Resource Type | Case study |
| Subject | Nephrology |
| Journal Impact Factor | 2.2/2023 |
| 5-Year Journal Impact Factor | 2.6/2023 |
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