A bite-size podcast brought to you by the International Society of Glomerular Disease. Nephrologists and glomerular disease experts Dr. Kenar Jhaveri (Northwell Health/Hofstra University) and Dr. Koyal Jain (UNC Chapel Hill) take a lighthearted look at the latest research, discuss clinical practice, and interview leaders in glomerular medicine — all in a short enough time to listen on your coffee break.
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In this special bonus episode of the podcast, Koyal and Kenar provide a maximally useful review of minimal change disease, from diagnosis (including secondary causes to screen for) to treatment options, including how to decide which patients may do better with which therapies.
Can’t get enough minimal change? Check out Episode 6 (with Astrid Weins) and Episode 7 (with Felicitas Hengel and Nicola Tomas) for more on the potential role of anti-nephrin autoantibodies in MCD.
Kronbichler A, Barnini C, Matyjek A, Gauckler P, Bruchfeld A, Caravaca-Fontan F, Floege J, Frangou E, Mirioglu S, Moran SM, Stevens KI, Teng YKO, Steiger S. Antibody-mediated podocytopathies: a disease entity that implies immunotherapy. Nephrol Dial Transplant. 2024 Jul 17:gfae166. doi: 10.1093/ndt/gfae166. Epub ahead of print. PMID: 39020250.
Hengel FE, Dehde S, Lassé M, Zahner G, Seifert L, Schnarre A, Kretz O, Demir F, Pinnschmidt HO, Grahammer F, Lucas R, Mehner LM, Zimmermann T, Billing AM, Oh J, Mitrotti A, Pontrelli P, Debiec H, Dossier C, Colucci M, Emma F, Smoyer WE, Weins A, Schaefer F, Alachkar N, Diemert A, Hogan J, Hoxha E, Wiech T, Rinschen MM, Ronco P, Vivarelli M, Gesualdo L, Tomas NM, Huber TB; International Society of Glomerular Disease. Autoantibodies Targeting Nephrin in Podocytopathies. N Engl J Med. 2024 May 25. doi: 10.1056/NEJMoa2314471. Epub ahead of print. PMID: 38804512.
Watts AJB, Keller KH, Lerner G, Rosales I, Collins AB, Sekulic M, Waikar SS, Chandraker A, Riella LV, Alexander MP, Troost JP, Chen J, Fermin D, Yee JL, Sampson MG, Beck LH Jr, Henderson JM, Greka A, Rennke HG, Weins A. Discovery of Autoantibodies Targeting Nephrin in Minimal Change Disease Supports a Novel Autoimmune Etiology. J Am Soc Nephrol. 2022 Jan;33(1):238-252. doi: 10.1681/ASN.2021060794. Epub 2021 Nov 3. PMID: 34732507; PMCID: PMC8763186.
In this episode, Koyal and Kenar recap everything you need to know about IgAN for the board exam (or just to refresh yourself on the current state of knowledge) — from pathophysiology to treatment decisions. They also discover that nobody is really sure how to pronounce Peyer’s patches (hey, don’t blame us, they’re all the way over in the ileum) so make sure you read the show notes to settle that mystery and check out additional resources!
Board Review Bonus #1 - IgA Nephropathy
Online calculator to predict progression (International IgAN Prediction Tool at biopsy - Adults)
Rehnberg J, Symreng A, Ludvigsson JF, Emilsson L. Inflammatory Bowel Disease Is More Common in Patients with IgA Nephropathy and Predicts Progression of ESKD: A Swedish Population-Based Cohort Study. J Am Soc Nephrol. 2021 Feb;32(2):411-423. doi: 10.1681/ASN.2020060848. Epub 2020 Nov 11. PMID: 33177116; PMCID: PMC8054887.
MEST-C (Oxford classification):
Trimarchi H, Barratt J, Cattran DC, Cook HT, Coppo R, Haas M, Liu ZH, Roberts IS, Yuzawa Y, Zhang H, Feehally J; IgAN Classification Working Group of the International IgA Nephropathy Network and the Renal Pathology Society; Conference Participants. Oxford Classification of IgA nephropathy 2016: an update from the IgA Nephropathy Classification Working Group. Kidney Int. 2017 May;91(5):1014-1021. . Epub 2017 Mar 22. PMID: 28341274.
Episode 7: Felicitas Hengel and Nicola Tomas on a New Chapter in Anti-Nephrin Autoantibodies
Épisode 7
mercredi 5 juin 2024 • Durée 16:15
In this episode, we talk with Dr. Felicitas Hengel, MD and Dr. Nicola Tomas, MD (both at the University Medical Center Hamburg-Eppendorf) about their groundbreaking anti-nephrin autoantibody research that was just presented at the 2024 ERA Congress and published in the New England Journal of Medicine. Is this a game-changer for minimal change? How could this new understanding change diagnosis and treatment in the future? Are anti-nephrin autoantibodies the next PLA2R? What are the next steps for follow-up studies? And how do you do a big international study like this, anyway?
References:
The study:
Hengel FE, Dehde S, Lassé M, Zahner G, Seifert L, Schnarre A, Kretz O, Demir F, Pinnschmidt HO, Grahammer F, Lucas R, Mehner LM, Zimmermann T, Billing AM, Oh J, Mitrotti A, Pontrelli P, Debiec H, Dossier C, Colucci M, Emma F, Smoyer WE, Weins A, Schaefer F, Alachkar N, Diemert A, Hogan J, Hoxha E, Wiech T, Rinschen MM, Ronco P, Vivarelli M, Gesualdo L, Tomas NM, Huber TB; International Society of Glomerular Disease. Autoantibodies Targeting Nephrin in Podocytopathies. N Engl J Med. 2024 May 25. doi: 10.1056/NEJMoa2314471. Epub ahead of print. PMID: 38804512.
Watts AJB, Keller KH, Lerner G, Rosales I, Collins AB, Sekulic M, Waikar SS, Chandraker A, Riella LV, Alexander MP, Troost JP, Chen J, Fermin D, Yee JL, Sampson MG, Beck LH Jr, Henderson JM, Greka A, Rennke HG, Weins A. Discovery of Autoantibodies Targeting Nephrin in Minimal Change Disease Supports a Novel Autoimmune Etiology. J Am Soc Nephrol. 2022 Jan;33(1):238-252. doi: 10.1681/ASN.2021060794. Epub 2021 Nov 3. PMID: 34732507; PMCID: PMC8763186.
Episode 6: Astrid Weins on Anti-Nephrin Antibodies and Nephropathology
Épisode 6
vendredi 17 mai 2024 • Durée 17:23
In this episode, Kenar and Koyal interview Dr. Astrid Weins, MD, PhD, about nephropathology, new approaches to solving the mysteries of nephrotic syndrome, and her research on anti-nephrin antibodies in minimal change disease. Dr. Weins is Chief of Integrated Renal Pathology at Mass General/Brigham and an Assistant Professor of Pathology at Harvard.
Interested in this topic? Stay tuned for additional new research on anti-nephrin antibodies that will be presented in a Late-Breaking Clinical Trials session on May 25 at the 2024 ERA Congress.
References:
2022 JASN paper proposing nephrin auti-antibodies in MCD:
Watts AJB, Keller KH, Lerner G, Rosales I, Collins AB, Sekulic M, Waikar SS, Chandraker A, Riella LV, Alexander MP, Troost JP, Chen J, Fermin D, Yee JL, Sampson MG, Beck LH Jr, Henderson JM, Greka A, Rennke HG, Weins A. Discovery of Autoantibodies Targeting Nephrin in Minimal Change Disease Supports a Novel Autoimmune Etiology. J Am Soc Nephrol. 2022 Jan;33(1):238-252. doi: 10.1681/ASN.2021060794. Epub 2021 Nov 3. PMID: 34732507; PMCID: PMC8763186.
Examples of Julie Goodwin and Bill Smoyer’s work on the podocyte’s response to steroids:
Zhou H, Tian X, Tufro A, Moeckel G, Ishibe S, Goodwin J. Loss of the podocyte glucocorticoid receptor exacerbates proteinuria after injury. Sci Rep. 2017 Aug 29;7(1):9833. doi: 10.1038/s41598-017-10490-z. PMID: 28852159; PMCID: PMC5575043.
Bhayana S, Zhao Y, Merchant M, Cummins T, Dougherty JA, Kamigaki Y, Pathmasiri W, McRitchie S, Mariani LH, Sumner S, Klein JB, Li L, Smoyer WE; Pediatric Nephrology Research Consortium. Multiomics Analysis of Plasma Proteomics and Metabolomics of Steroid Resistance in Childhood Nephrotic Syndrome Using a "Patient-Specific" Approach. Kidney Int Rep. 2023 Mar 23;8(6):1239-1254. doi: 10.1016/j.ekir.2023.03.015. PMID: 37284673; PMCID: PMC10239920.
Episode 5: Industry Perspective with Jula Inrig: Endothelin Antagonism, IgAN, FSGS, Clinical Trial Career Paths, and the New Era of Nephrology Trials
Épisode 5
vendredi 26 avril 2024 • Durée 24:54
In this episode, Kenar and Koyal talk with Dr. Jula Inrig about endothelin physiology and different approaches to endothelin antagonism, trials of sparsentan in IgAN and FSGS, the art and science of clinical trial design, career paths in clinical research outside academia, and how we got to our current era of plentiful nephrology clinical trials.
Disclosure: Jula Inrig is the Chief Medical Officer of Travere Therapeutics, which is one of multiple corporate partners that provide financial support to ISGD. Dr. Inrig also serves independently on the ISGD Steering Committee as a representative of industry. Travere had no role in developing the interview questions, editing the episode, or otherwise determining the content of this podcast.
References
SONAR trial and effects of endothelin-A antagonism on heart failure:
Waijer SW, Gansevoort RT, Bakris GL, Correa-Rotter R, Hou FF, Kohan DE, Kitzman DW, Makino H, McMurray JJV, Perkovic V, Tobe S, Parving HH, de Zeeuw D, Heerspink HJL. The Effect of Atrasentan on Kidney and Heart Failure Outcomes by Baseline Albuminuria and Kidney Function: A Post Hoc Analysis of the SONAR Randomized Trial. Clin J Am Soc Nephrol. 2021 Dec;16(12):1824-1832. doi: 10.2215/CJN.07340521. Epub 2021 Dec 1. PMID: 34853062; PMCID: PMC8729501.
PROTECT trial:
Rovin BH, Barratt J, Heerspink HJL, Alpers CE, Bieler S, Chae DW, Diva UA, Floege J, Gesualdo L, Inrig JK, Kohan DE, Komers R, Kooienga LA, Lafayette R, Maes B, Małecki R, Mercer A, Noronha IL, Oh SW, Peh CA, Praga M, Preciado P, Radhakrishnan J, Rheault MN, Rote WE, Tang SCW, Tesar V, Trachtman H, Trimarchi H, Tumlin JA, Wong MG, Perkovic V; DUPRO steering committee and PROTECT Investigators. Efficacy and safety of sparsentan versus irbesartan in patients with IgA nephropathy (PROTECT): 2-year results from a randomised, active-controlled, phase 3 trial. Lancet. 2023 Dec 2;402(10417):2077-2090. doi: 10.1016/S0140-6736(23)02302-4. Epub 2023 Nov 3. PMID: 37931634.
Episode 4: NephMadness Special! Anna Burgner on Preeclampsia
Épisode 4
vendredi 1 mars 2024 • Durée 20:01
It's March, and that means it's time for NephMadness! Every year, our friends at AJKDBlog pit 16 unique regions of nephrology against each other in a basketball-style tournament. Prepare for the Preeclampsia region by listening to this special episode, where Anna Burgner from Vanderbilt University joins Kenar and Koyal to discuss recent discoveries in preeclampsia (the world's most common glomerulopathy).
Will the victor be Diagnosis and Treatment of Preeclampsia, or Risk Factors, Prevention, and Long-Term Sequelae in Preeclampsia? Learn more at ajkdblog.org and submit your picks at nephmadness.com by March 31!
References:
1. de Jesús GR, Lacerda MI, Rodrigues BC, Dos Santos FC, do Nascimento AP, Cristóvão Porto L, de Jesús NR, Levy RA, Klumb EM. Soluble Flt-1, Placental Growth Factor, and Vascular Endothelial Growth Factor Serum Levels to Differentiate Between Active Lupus Nephritis During Pregnancy and Preeclampsia. Arthritis Care Res (Hoboken). 2021 May;73(5):717-721. doi: 10.1002/acr.24360. Epub 2021 Apr 3. PMID: 32583963.
2. Cross SN, Ratner E, Rutherford TJ, Schwartz PE, Norwitz ER. Bevacizumab-mediated interference with VEGF signaling is sufficient to induce a preeclampsia-like syndrome in nonpregnant women. Rev Obstet Gynecol. 2012;5(1):2-8. PMID: 22582121; PMCID: PMC3349918.
3. Wiles K, Bramham K, Seed PT, Brockbank A, Nelson-Piercy C, Karumanchi SA, Lightstone L, Chappell LC. Placental and endothelial biomarkers for the prediction of superimposed pre-eclampsia in chronic kidney disease. Pregnancy Hypertens. 2021 Jun;24:58-64. doi: 10.1016/j.preghy.2021.02.010. Epub 2021 Feb 23. PMID: 33677420.
4. Tita AT, Szychowski JM, Boggess K, Dugoff L, Sibai B, Lawrence K, Hughes BL, Bell J, Aagaard K, Edwards RK, Gibson K, Haas DM, Plante L, Metz T, Casey B, Esplin S, Longo S, Hoffman M, Saade GR, Hoppe KK, Foroutan J, Tuuli M, Owens MY, Simhan HN, Frey H, Rosen T, Palatnik A, Baker S, August P, Reddy UM, Kinzler W, Su E, Krishna I, Nguyen N, Norton ME, Skupski D, El-Sayed YY, Ogunyemi D, Galis ZS, Harper L, Ambalavanan N, Geller NL, Oparil S, Cutter GR, Andrews WW; Chronic Hypertension and Pregnancy (CHAP) Trial Consortium. Treatment for Mild Chronic Hypertension during Pregnancy. N Engl J Med. 2022 May 12;386(19):1781-1792. doi: 10.1056/NEJMoa2201295. Epub 2022 Apr 2. PMID: 35363951; PMCID: PMC9575330.
Episode 3: Opeyemi Olabisi on APOL1-Mediated Kidney Disease and Community Engagement
Épisode 3
jeudi 11 janvier 2024 • Durée 15:28
We talk with Dr. Opeyemi Olabisi, MD, PhD, about the history and future of APOL1-mediated FSGS, the role of clinical researchers in building trust with patients, his innovative CARE and JUSTICE programs to bring kidney health screenings and research opportunities to the underrepresented African American community, and why his expertise as an MD/PhD in molecular biology led him to also become a leader in community engagement. The JAK-STAT pathway gets some love as well!
Disclosures: Dr. Olabisi reports receiving research funding from NIH and Icagen, and consulting for Maze Therapeutics and Podium Bio.
Episode 2: Kidney Week Micro-Interviews
Épisode 2
mercredi 22 novembre 2023 • Durée 10:51
In this episode of GN in Ten, Koyal and Kenar take the show on the road to Kidney Week to ask attendees about their favorite glomerular diseases. Listen closely for a surprise Shakespearean crossover!
Episode 1: Tobias Huber on ISGD and the Future of Glomerular Medicine
Épisode 1
mardi 19 septembre 2023 • Durée 10:46
International Society of Glomerular Disease President Prof. Dr. Tobias B. Huber of the University Medical Center Hamburg-Eppendorf discusses the mission of the society and his vision for the future of glomerular disease.
Welcome to GN in Ten from the International Society of Glomerular Disease! In this trailer, our hosts Dr. Kenar Jhaveri and Dr. Koyal Jain introduce themselves and the podcast.
Learn more about the International Society of Glomerular Disease (ISGD) at is-gd.org.
Heerspink HJL, Stefánsson BV, Correa-Rotter R, Chertow GM, Greene T, Hou FF, Mann JFE, McMurray JJV, Lindberg M, Rossing P, Sjöström CD, Toto RD, Langkilde AM, Wheeler DC; DAPA-CKD Trial Committees and Investigators. Dapagliflozin in Patients with Chronic Kidney Disease. N Engl J Med. 2020 Oct 8;383(15):1436-1446. doi: 10.1056/NEJMoa2024816. Epub 2020 Sep 24. PMID: 32970396.
EMPA-Kidney:
The EMPA-KIDNEY Collaborative Group; Herrington WG, Staplin N, Wanner C, Green JB, Hauske SJ, Emberson JR, Preiss D, Judge P, Mayne KJ, Ng SYA, Sammons E, Zhu D, Hill M, Stevens W, Wallendszus K, Brenner S, Cheung AK, Liu ZH, Li J, Hooi LS, Liu W, Kadowaki T, Nangaku M, Levin A, Cherney D, Maggioni AP, Pontremoli R, Deo R, Goto S, Rossello X, Tuttle KR, Steubl D, Petrini M, Massey D, Eilbracht J, Brueckmann M, Landray MJ, Baigent C, Haynes R. Empagliflozin in Patients with Chronic Kidney Disease. N Engl J Med. 2023 Jan 12;388(2):117-127. doi: 10.1056/NEJMoa2204233. Epub 2022 Nov 4. PMID: 36331190; PMCID: PMC7614055.
STOP-IgAN trial:
Rauen T, Eitner F, Fitzner C, Sommerer C, Zeier M, Otte B, Panzer U, Peters H, Benck U, Mertens PR, Kuhlmann U, Witzke O, Gross O, Vielhauer V, Mann JF, Hilgers RD, Floege J; STOP-IgAN Investigators. Intensive Supportive Care plus Immunosuppression in IgA Nephropathy. N Engl J Med. 2015 Dec 3;373(23):2225-36. doi: 10.1056/NEJMoa1415463. PMID: 26630142.
TESTING trial:
Lv J, Wong MG, Hladunewich MA, Jha V, Hooi LS, Monaghan H, Zhao M, Barbour S, Jardine MJ, Reich HN, Cattran D, Glassock R, Levin A, Wheeler DC, Woodward M, Billot L, Stepien S, Rogers K, Chan TM, Liu ZH, Johnson DW, Cass A, Feehally J, Floege J, Remuzzi G, Wu Y, Agarwal R, Zhang H, Perkovic V; TESTING Study Group. Effect of Oral Methylprednisolone on Decline in Kidney Function or Kidney Failure in Patients With IgA Nephropathy: The TESTING Randomized Clinical Trial. JAMA. 2022 May 17;327(19):1888-1898. doi: 10.1001/jama.2022.5368. PMID: 35579642; PMCID: PMC9115617.
Phase 3 trial of targeted-release budesonide (NefIgArd):
Barratt J, Lafayette R, Kristensen J, Stone A, Cattran D, Floege J, Tesar V, Trimarchi H, Zhang H, Eren N, Paliege A, Rovin BH; NefIgArd Trial Investigators. Results from part A of the multi-center, double-blind, randomized, placebo-controlled NefIgArd trial, which evaluated targeted-release formulation of budesonide for the treatment of primary immunoglobulin A nephropathy. Kidney Int. 2023 Feb;103(2):391-402. doi: 10.1016/j.kint.2022.09.017. Epub 2022 Oct 19. PMID: 36270561.
MAIN trial:
Hou FF, Xie D, Wang J, Xu X, Yang X, Ai J, Nie S, Liang M, Wang G, Jia N; MAIN Trial Investigators. Effectiveness of Mycophenolate Mofetil Among Patients With Progressive IgA Nephropathy: A Randomized Clinical Trial. JAMA Netw Open. 2023 Feb 1;6(2):e2254054. doi: 10.1001/jamanetworkopen.2022.54054. PMID: 36745456.
A note on pronunciation: We dug a little deeper after recording this, and following the people they’re named after, Jean Berger (a French speaker) and Johann Conrad Peyer (a German speaker), “Berger” should rhyme with “hooray” and “Peyer” should rhyme with “fire.” The more you know!
Disclosures:
ISGD receives general financial support from Boehringer Ingelheim, Travere Therapeutics, and Calliditas Therapeutics, among other companies, through corporate partnerships. None of these entities was involved in or had any influence on the content or editing of this episode.
Koyal Jain serves as principal site investigator for Kaneka’s FSGSALLAGE (NCT04065438) and FSGS Pediatric (NCT02235857) clinical trials.
Kenar Jhaveri is the National Scientific Lead for Otsuka's VISIONARY trial for IgA Nephropathy, and serves as a consultant for Otsuka, Novartis, and Calliditas.
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Pediatric cohort and rapid response to corticosteroids:
KHI project defining the relationship between proteinuria, GFR, and kidney failure in IgAN:
Thompson A, Carroll K, A Inker L, Floege J, Perkovic V, Boyer-Suavet S, W Major R, I Schimpf J, Barratt J, Cattran DC, S Gillespie B, Kausz A, W Mercer A, Reich HN, H Rovin B, West M, Nachman PH. Proteinuria Reduction as a Surrogate End Point in Trials of IgA Nephropathy. Clin J Am Soc Nephrol. 2019 Mar 7;14(3):469-481. doi: 10.2215/CJN.08600718. Epub 2019 Jan 11. PMID: 30635299; PMCID: PMC6419287.
Rossing P, Baeres FMM, Bakris G, Bosch-Traberg H, Gislum M, Gough SCL, Idorn T, Lawson J, Mahaffey KW, Mann JFE, Mersebach H, Perkovic V, Tuttle K, Pratley R. The rationale, design and baseline data of FLOW, a kidney outcomes trial with once-weekly semaglutide in people with type 2 diabetes and chronic kidney disease. Nephrol Dial Transplant. 2023 Aug 31;38(9):2041-2051. doi: 10.1093/ndt/gfad009. Erratum in: Nephrol Dial Transplant. 2024 Mar 27;39(4):724. PMID: 36651820; PMCID: PMC10469096.
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