Publications by authors named "Warren L Kupin"

Solid Organ Transplant (SOT) recipients are at significant higher risk for COVID-19 and due to immunosuppressive medication, the immunogenicity after vaccination is suboptimal. In the previous studies, booster method showed significant benefit in this population. In the current study, we compared using a mix-and-match method vs.

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Background: Primary FSGS manifests with nephrotic syndrome and may recur following KT. Failure to respond to conventional therapy after recurrence results in poor outcomes. Evaluation of podocyte B7-1 expression and treatment with abatacept (a B7-1 antagonist) has shown promise but remains controversial.

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A gentleman in his 60s with end-stage kidney disease status post kidney transplantation on prednisone and tacrolimus presented with generalised weakness for 7 days, associated with altered mental status. Investigations revealed pancytopenia, acute kidney injury, hypercalcaemia, decreased parathyroid hormone (PTH) and normal calcitriol levels. CT of the chest showed multifocal lung opacities suspicious for malignancy.

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Background: Previous studies have demonstrated inferior patient and graft survival following kidney transplant (KT) in HIV+/HCV+ coinfected patients compared to HIV+/HCV- recipients. However, these studies were conducted prior to the availability of direct-acting antiviral (DAA) agents and data in the modern era are lacking.

Methods: Single center retrospective study of HIV+/HCV+ coinfected KT recipients (2007-2017).

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Donor-derived infections (DDIs) are a very rare but potentially devastating complication of solid organ transplantation. Here we present a cluster of proven donor-derived cryptococcal infection in the kidney, liver, and lung recipients from a single donor. Remarkably, the onset of illness in the kidney and liver recipients occurred more than 8-12 weeks after transplantation, which is beyond the incubation period previously reported for donor-derived cryptococcosis.

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Antiretroviral therapy (ART) poses challenging drug-drug interactions with immunosuppressant agents in transplant recipients.  We aimed to determine the impact of specific antiretroviral regimens in clinical outcomes of HIV kidney transplant recipients.  A single-center, retrospective cohort study was conducted at a large academic center.

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By definition, viral-associated GN indicates the direct pathogenic relationship between active viral replication and the development of acute GN. This definition is in sharp contrast to the semantic label and pathophysiologic foundation behind postinfectious GN that uniquely develops only during a period of resolved and absent active infection. The primary example of postinfectious GN are the glomerular lesions described after a pharyngeal or cutaneous streptococcal infection and do not represent the clinical or immunologic pattern seen with viral-associated GN.

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Viruses are capable of inducing a wide spectrum of glomerular disorders that can be categorized on the basis of the duration of active viremia: acute, subacute, or chronic. The variable responses of the adaptive immune system to each time period of viral infection results mechanistically in different histologic forms of glomerular injury. The unique presence of a chronic viremic carrier state with either hepatitis C (HCV) or HIV has led to the opportunity to study in detail various pathogenic mechanisms of viral-induced glomerular injury, including direct viral infection of renal tissue and the development of circulating immune complexes composed of viral antigens that deposit along the glomerular basement membrane.

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Central diabetes insipidus (CDI) is characterized clinically by the presence of polyuria with the subsequent development of volume depletion and hypernatremia. In patients with dialysis-dependent end-stage renal disease (ESRD), neither of these findings can be expressed due to the absence of renal function. A 59-year-old woman with anuric ESRD of unknown etiology had been on peritoneal dialysis for 8 years prior to receiving a cadaveric allograft.

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