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A kidney transplant is a surgical approach that involves replacing a non-functioning kidney with a healthy one from a donor. This procedure is often a treatment option for end-stage renal disease (ESRD) patients. The method requires careful recipient selection, including evaluating various medical and psychosocial factors. These criteria vary between transplant centers but generally include assessments of the patient's overall health, adherence to medical recommendations, and lifestyle...
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Postoperative Nursing Management for Kidney Transplant PatientsPostoperative nursing management care includes monitoring the surgical site, encouraging early movement, and promoting lung health through breathing exercises. Nurses also administer prescribed medications like H2-blockers, such as famotidine, or proton pump inhibitors, like omeprazole, to help prevent gastrointestinal ulcers and bleeding. Fungal infections in the mouth and bladder can result from immunosuppressive and antibiotic...
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Preoperative ManagementThe primary goals of preoperative management in kidney transplantation are to optimize the patient’s metabolic state and prepare them for surgery through diet adjustments, necessary dialysis, and tailored medical treatment. This phase also involves comprehensive infection screening and patient education about the surgical procedure and postoperative care to improve outcomes and adherence.Medical ManagementA comprehensive evaluation is required for both the living...
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Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...
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Measurement of T Cell Alloreactivity Using Imaging Flow Cytometry
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Gene Expression Profiling in Kidney Transplants with Immune Checkpoint Inhibitor-Associated Adverse Events.

Benjamin A Adam1, Naoka Murakami2, Graeme Reid1

  • 1Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada.

Clinical Journal of the American Society of Nephrology : CJASN
|July 10, 2021
PubMed
Summary
This summary is machine-generated.

Immune checkpoint inhibitors can cause kidney transplant rejection. Gene expression analysis identified IFI27 as a biomarker to distinguish immune checkpoint inhibitor-associated rejection from acute interstitial nephritis in kidney biopsies.

Keywords:
acute rejectionallograftscancerdrug nephrotoxicitygene expressiongene expression profilinghistopathologyimmune checkpoint inhibitorskidney transplantation

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Area of Science:

  • Nephrology
  • Immunology
  • Oncology

Background:

  • Immune checkpoint inhibitors (ICIs) are vital in cancer therapy but pose risks for kidney transplant recipients, often leading to rejection.
  • Distinguishing ICI-associated rejection from acute interstitial nephritis (AIN) is challenging due to overlapping histopathology.
  • Understanding these entities is crucial for managing kidney transplant patients on ICIs.

Purpose of the Study:

  • To investigate the molecular differences and similarities between ICI-associated rejection and ICI-associated AIN.
  • To identify potential biomarkers for differentiating these conditions using gene expression analysis.
  • To improve diagnostic accuracy and clinical management strategies for kidney transplant patients.

Main Methods:

  • Utilized NanoString technology to analyze the expression of 725 immune-related genes in 75 archival kidney biopsies.
  • Included discovery and validation cohorts comprising various kidney pathologies, including ICI-associated conditions and controls.
  • Employed principal component analysis to assess gene expression patterns and identify differentiating markers.

Main Results:

  • Identified significant molecular overlap between ICI-associated AIN and T cell-mediated rejection (TCMR).
  • Discovered and validated *IFI27* (an IFN-α-induced transcript) as a highly accurate biomarker distinguishing ICI-associated TCMR from ICI-associated AIN.
  • Observed that both ICI-associated TCMR and ICI-associated AIN showed greater molecular similarity to drug-induced AIN than to pure TCMR, suggesting hypersensitivity mechanisms.

Conclusions:

  • Despite molecular similarities, biopsy-based *IFI27* gene expression can reliably differentiate ICI-associated rejection from ICI-associated AIN.
  • This finding offers a potential diagnostic tool to guide clinical management in kidney transplant recipients.
  • Highlights the importance of gene expression profiling in understanding complex immune-related kidney diseases.