2024
Interleukin-16 is increased in dialysis patients but is not a cardiovascular risk factor
Brösecke F, Pfau A, Ermer T, Dein Terra Mota Ribeiro A, Rubenbauer L, Rao V, Burlein S, Genser B, Reichel M, Aronson P, Coca S, Knauf F. Interleukin-16 is increased in dialysis patients but is not a cardiovascular risk factor. Scientific Reports 2024, 14: 11323. PMID: 38760468, PMCID: PMC11101424, DOI: 10.1038/s41598-024-61808-7.Peer-Reviewed Original ResearchConceptsIL-16 levelsIL-16Dialysis patientsCardiovascular eventsConcentrations of IL-16Kidney failureUremic toxinsCardiovascular diseaseCompared to healthy individualsPlasma oxalate concentrationActivated immune cellsAssociated with cardiovascular diseaseIL-16 concentrationCytokine IL-16Cardiovascular risk factorsNo significant associationPlasma oxalateInflammatory markersImmune cellsCytokine concentrationsInterleukin-16US patientsCohort 1Cardiovascular outcomesHealthy individuals
2023
Challenges to Implementation of Community Health Worker-Led Chronic Obstructive Pulmonary Disease (COPD) Screening and Referral in Rural Uganda: A Qualitative Study using the Implementation Outcomes Framework
Ingenhoff R, Robertson N, Munana R, Bodnar B, Weswa I, Sekitoleko I, Gaal J, Kirenga B, Kalyesubula R, Knauf F, Siddharthan T. Challenges to Implementation of Community Health Worker-Led Chronic Obstructive Pulmonary Disease (COPD) Screening and Referral in Rural Uganda: A Qualitative Study using the Implementation Outcomes Framework. International Journal Of Chronic Obstructive Pulmonary Disease 2023, 18: 2769-2783. PMID: 38046984, PMCID: PMC10693197, DOI: 10.2147/copd.s420137.Peer-Reviewed Original ResearchConceptsChronic obstructive pulmonary diseaseImplementation Outcomes FrameworkCOPD screeningRural UgandaBurden of COPDReferral processCommunity health worker interventionHealth worker interventionObstructive pulmonary diseaseHealthcare providers' perceptionsCause of deathHigh patient volumeCommunity-based interventionsCHW supportCOPD awarenessCOPD careMiddle-income countriesPulmonary diseaseMedication accessBody of evidenceOutcomes FrameworkQualitative studyHealth outcomesProviders' perceptionsPatient volumePrinciples for task shifting hypertension and diabetes screening and referral: a qualitative study exploring patient, community health worker and healthcare professional perceptions in rural Uganda
Ingenhoff R, Munana R, Weswa I, Gaal J, Sekitoleko I, Mutabazi H, Bodnar B, Rabin T, Siddharthan T, Kalyesubula R, Knauf F, Nalwadda C. Principles for task shifting hypertension and diabetes screening and referral: a qualitative study exploring patient, community health worker and healthcare professional perceptions in rural Uganda. BMC Public Health 2023, 23: 881. PMID: 37173687, PMCID: PMC10176286, DOI: 10.1186/s12889-023-15704-w.Peer-Reviewed Original ResearchConceptsCommunity health workersNon-communicable diseasesHealthcare workersRural UgandaHealth workersCHW knowledgeNCD screeningDiabetes mellitusMiddle-income countriesCHW characteristicsHypertensionCHW programsCare deliveryHealthcare accessHealthcare professionalsReferralPatient accessHealthcare systemSuccessful program implementationDiabetesPatientsProfessionals' perceptionsFramework methodFocus group discussionsScreeningStrikingly conserved gene expression changes of polyamine regulating enzymes among various forms of acute and chronic kidney injury
Sieckmann T, Schley G, Ögel N, Kelterborn S, Boivin F, Fähling M, Ashraf M, Reichel M, Vigolo E, Hartner A, Lichtenberger F, Breiderhoff T, Knauf F, Rosenberger C, Aigner F, Schmidt-Ott K, Scholz H, Kirschner K. Strikingly conserved gene expression changes of polyamine regulating enzymes among various forms of acute and chronic kidney injury. Kidney International 2023, 104: 90-107. PMID: 37121432, DOI: 10.1016/j.kint.2023.04.005.Peer-Reviewed Original ResearchConceptsIschemia-reperfusion injuryKidney injuryKidney pathologyExperimental kidney injuryChronic kidney injuryUnilateral ureteral obstructionForms of injuryPolyamine synthesisCyclosporine treatmentArterial hypertensionKidney transplantationUreteral obstructionKidney levelsTissue injuryTubular castsHealthy kidneysHomeostasis contributesInjuryKidneyExperimental modelKidney cell linePutrescine contentReduced expressionGene expression changesTransplantationSLC26A1 is a major determinant of sulfate homeostasis in humans
Pfau A, López-Cayuqueo K, Scherer N, Wuttke M, Wernstedt A, Fassrainer D, Smith D, van de Kamp J, Ziegeler K, Eckardt K, Luft F, Aronson P, Köttgen A, Jentsch T, Knauf F. SLC26A1 is a major determinant of sulfate homeostasis in humans. Journal Of Clinical Investigation 2023, 133: e161849. PMID: 36719378, PMCID: PMC9888379, DOI: 10.1172/jci161849.Peer-Reviewed Original ResearchConceptsSulfate homeostasisIntervertebral disc disordersWhole-exome sequencingMajor determinantBack painPatient presentingMusculoskeletal healthDisc disordersPlasma sulfateSulfate reabsorptionFunctional expression assaysCartilage healthHomozygous mutationPotential targetPopulation studiesNumerous physiological processesRecent evidenceExome analysisHomeostasisHyposulfatemiaExpression assaysPivotal roleClinical geneticsAdditional variantsHumans
2022
Oxalate homeostasis
Ermer T, Nazzal L, Tio M, Waikar S, Aronson P, Knauf F. Oxalate homeostasis. Nature Reviews Nephrology 2022, 19: 123-138. PMID: 36329260, PMCID: PMC10278040, DOI: 10.1038/s41581-022-00643-3.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsConceptsKidney diseaseOxalate homeostasisAnti-inflammatory medicationsChronic kidney diseaseKidney replacement therapySudden cardiac deathProgressive kidney diseaseOutlook of patientsOxalate nephropathyCardiovascular complicationsSystemic inflammationCardiac deathReplacement therapySecondary hyperoxaluriaKidney failureElevated plasmaConsequent impairmentNovel therapeuticsPatientsDiseaseEffective elimination strategiesEndogenous sourcesHomeostasisElimination strategyExcretionAuthors’ Reply: Calcium-Based Phosphate Binders and Plasma Oxalate Concentration in Dialysis Patients
Pfau A, Knauf F. Authors’ Reply: Calcium-Based Phosphate Binders and Plasma Oxalate Concentration in Dialysis Patients. Journal Of The American Society Of Nephrology 2022, 33: 1428-1428. PMID: 35500939, PMCID: PMC9257799, DOI: 10.1681/asn.2022030359.Peer-Reviewed Original ResearchEffectiveness of a community health worker-delivered care intervention for hypertension control in Uganda: study protocol for a stepped wedge, cluster randomized control trial
Ingenhoff R, Nandawula J, Siddharthan T, Ssekitoleko I, Munana R, Bodnar B, Weswa I, Kirenga B, Mutungi G, van der Giet M, Kalyesubula R, Knauf F. Effectiveness of a community health worker-delivered care intervention for hypertension control in Uganda: study protocol for a stepped wedge, cluster randomized control trial. Trials 2022, 23: 440. PMID: 35610712, PMCID: PMC9128241, DOI: 10.1186/s13063-022-06403-9.Peer-Reviewed Original ResearchConceptsCommunity health workersNon-communicable diseasesUncontrolled hypertensionBlood pressureCardiovascular disease risk assessmentHealthy lifestyle counselingMonthly household visitsBlood pressure controlSub-Saharan African settingPatient-related factorsPrimary care levelStepped-wedge clusterMedical treatment outcomeMajority of LMICsMulti-component interventionDisease risk assessmentNCD clinicsHypertension controlHypertensive patientsLifestyle counselingAdult patientsHTN managementMiddle-income countriesMedication adherenceEntire cohortHemodialysis and biotransformation of erythrocyte epoxy fatty acids in peripheral tissue
Liu T, Dogan I, Rothe M, Kunz J, Knauf F, Gollasch M, Luft F, Gollasch B. Hemodialysis and biotransformation of erythrocyte epoxy fatty acids in peripheral tissue. Prostaglandins Leukotrienes And Essential Fatty Acids 2022, 181: 102453. PMID: 35633593, DOI: 10.1016/j.plefa.2022.102453.Peer-Reviewed Original ResearchConceptsRed blood cellsHD treatmentHemodialysis treatmentEnd-stage renal disease patientsHydroxyeicosatetraenoic acidHydroxyeicosapentaenoic acidSingle hemodialysis treatmentChronic kidney diseaseRenal disease patientsRenal replacement therapyFatty acid statusVenous blood samplesHydroxydocosahexaenoic acidEpoxy fatty acidsCause of mortalityLOX pathwayRenal failureFatty acidsKidney diseaseDisease patientsVenous bloodCardiovascular functionAcid statusArteriovenous differenceCardiovascular disease
2021
Dissection of Barrier Dysfunction in Organoid-Derived Human Intestinal Epithelia Induced by Giardia duodenalis
Holthaus D, Kraft M, Krug S, Wolf S, Müller A, Delgado Betancourt E, Schorr M, Holland G, Knauf F, Schulzke J, Aebischer T, Klotz C. Dissection of Barrier Dysfunction in Organoid-Derived Human Intestinal Epithelia Induced by Giardia duodenalis. Gastroenterology 2021, 162: 844-858. PMID: 34822802, DOI: 10.1053/j.gastro.2021.11.022.Peer-Reviewed Original ResearchMeSH KeywordsApoptosisCaco-2 CellsChloridesCyclic AMPCyclic AMP-Dependent Protein KinasesCystic Fibrosis Transmembrane Conductance RegulatorDuodenumElectric ImpedanceGiardia lambliaGiardiasisHumansInterleukin-1Intestinal MucosaIon TransportNF-kappa BOrganoidsParasite LoadSignal TransductionSolute Carrier Family 12, Member 2Tight JunctionsTranscriptomeTumor Necrosis Factor-alphaConceptsG. duodenalis infectionBarrier dysfunctionGiardia duodenalisHuman duodenal tissueIntestinal barrier dysfunctionHuman intestinal epitheliumResponse element-binding proteinTight junction compositionProtozoan Giardia duodenalisAdequate cellular modelsChronic casesMajor expression changesPathophysiological mechanismsBarrier breakdownDuodenal mucosaGastrointestinal illnessDuodenal tissueBarrier lossPathogenic eventsHuman organoid systemEpithelial barrierTranswell systemChloride secretionIntestinal epitheliumTight junction componentsDeterminants and Outcomes Associated With Urinary Calcium Excretion in Chronic Kidney Disease
Liu J, Tio M, Verma A, Schmidt I, Ilori T, Knauf F, Mc Causland F, Waikar S. Determinants and Outcomes Associated With Urinary Calcium Excretion in Chronic Kidney Disease. The Journal Of Clinical Endocrinology & Metabolism 2021, 107: e281-e292. PMID: 34390334, PMCID: PMC8684460, DOI: 10.1210/clinem/dgab574.Peer-Reviewed Original ResearchConceptsUrinary calcium excretionChronic kidney diseaseEnd-stage kidney diseaseCalcium excretionKidney diseaseChronic Renal Insufficiency Cohort (CRIC) StudyIncident end-stage kidney diseaseLevel of CKDSelf-identified black raceAtherosclerotic cardiovascular disease eventsSerum parathyroid hormoneCardiovascular disease eventsAdverse clinical eventsAdverse clinical outcomesStage kidney diseaseBaseline eGFRCKD progressionUrinary sodiumCause mortalityCohort studyLoop diureticsThiazide diureticsClinical outcomesParathyroid hormoneVascular calcificationAcceptability of patient-centered hypertension education delivered by community health workers among people living with HIV/AIDS in rural Uganda
Batte C, Mukisa J, Rykiel N, Mukunya D, Checkley W, Knauf F, Kalyesubula R, Siddharthan T. Acceptability of patient-centered hypertension education delivered by community health workers among people living with HIV/AIDS in rural Uganda. BMC Public Health 2021, 21: 1343. PMID: 34233648, PMCID: PMC8264981, DOI: 10.1186/s12889-021-11411-6.Peer-Reviewed Original ResearchConceptsCommunity health workersHIV/AIDSPatient-centered educationHealth workersRural UgandaSpecific health educationPrevalence of hypertensionManagement of hypertensionImproved health outcomesDisease-specific informationSelf-perceived skill levelFocus group discussionsMiddle-income countriesHypertension educationHealth facilitiesPatient questionsHypertensionHealth outcomesPLWHAHealth educationNakaseke districtHealth interventionsLMIC settingsFurther studiesHTN
2020
Pathophysiology and Treatment of Enteric Hyperoxaluria
Witting C, Langman C, Assimos D, Baum M, Kausz A, Milliner D, Tasian G, Worcester E, Allain M, West M, Knauf F, Lieske J. Pathophysiology and Treatment of Enteric Hyperoxaluria. Clinical Journal Of The American Society Of Nephrology 2020, 16: 487-495. PMID: 32900691, PMCID: PMC8011014, DOI: 10.2215/cjn.08000520.Peer-Reviewed Original ResearchConceptsEnteric hyperoxaluriaGastrointestinal disordersBariatric surgical proceduresCurrent therapeutic optionsAvailable treatment strategiesUrinary oxalate excretionKidney stone eventsLong-term efficacyKidney Health InitiativeNew therapeutic approachesComplicated obesityDietary modificationFat malabsorptionOxalate excretionTherapeutic optionsAdverse outcomesKidney failureStone eventsTreatment strategiesDietary oxalateSurgical proceduresTherapeutic approachesSevere casesHyperoxaluriaHealth initiativesStiripentol fails to lower plasma oxalate in a dialysis-dependent PH1 patient
Kempf C, Pfau A, Holle J, Müller-Schlüter K, Bufler P, Knauf F, Müller D. Stiripentol fails to lower plasma oxalate in a dialysis-dependent PH1 patient. Pediatric Nephrology 2020, 35: 1787-1789. PMID: 32418144, PMCID: PMC7385015, DOI: 10.1007/s00467-020-04585-5.Peer-Reviewed Original ResearchConceptsEnd-stage renal diseaseChronic kidney diseaseLactate dehydrogenase 5Urinary oxalateAdvanced chronic kidney diseaseAnti-convulsive drugsMultisystemic metabolic disorderLiver-kidney transplantationMajority of patientsCurrent standard treatmentTreatment of childrenHyperoxaluria type 1Anuric infantsPH patientsUox excretionRenal diseaseDravet syndromeKidney diseasePrimary hyperoxaluriaCompassionate useStandard treatmentPlasma concentrationsMetabolic disordersPromising drugEarly infancy
2019
P2X7 Receptor Stimulation Is Not Required for Oxalate Crystal-Induced Kidney Injury
Luz H, Reichel M, Unwin R, Mutig K, Najenson A, Tonner L, Eckardt K, Tam F, Knauf F. P2X7 Receptor Stimulation Is Not Required for Oxalate Crystal-Induced Kidney Injury. Scientific Reports 2019, 9: 20086. PMID: 31882798, PMCID: PMC6934555, DOI: 10.1038/s41598-019-56560-2.Peer-Reviewed Original ResearchConceptsIL-1ß releaseDendritic cellsKidney failureP2X7 receptorBone marrowNLRP3/CASPP2X7 receptor signalingProgressive kidney diseaseSuitable therapeutic targetProgressive kidney failureMonosodium urate crystalsHuman peripheral bloodKidney injuryRenal inflammationRenal injuryTubular damageWT miceIL-1ßKidney diseasePeripheral bloodCytokine releasePlasma creatinineMurine bone marrowInterleukin-1betaInflammasome activationTumor necrosis factor stimulates fibroblast growth factor 23 levels in chronic kidney disease and non-renal inflammation
Egli-Spichtig D, Imenez Silva P, Glaudemans B, Gehring N, Bettoni C, Zhang M, Pastor-Arroyo E, Schönenberger D, Rajski M, Hoogewijs D, Knauf F, Misselwitz B, Frey-Wagner I, Rogler G, Ackermann D, Ponte B, Pruijm M, Leichtle A, Fiedler G, Bochud M, Ballotta V, Hofmann S, Perwad F, Föller M, Lang F, Wenger R, Frew I, Wagner C. Tumor necrosis factor stimulates fibroblast growth factor 23 levels in chronic kidney disease and non-renal inflammation. Kidney International 2019, 96: 890-905. PMID: 31301888, DOI: 10.1016/j.kint.2019.04.009.Peer-Reviewed Original ResearchMeSH KeywordsAdultAnimalsCell LineCohort StudiesDisease Models, AnimalFemaleFibroblast Growth Factor-23Fibroblast Growth FactorsHumansInflammatory Bowel DiseasesInterleukin-10KidneyMaleMiceMice, TransgenicMiddle AgedNuclear Receptor Subfamily 4, Group A, Member 2Primary Cell CultureRenal Insufficiency, ChronicTumor Necrosis Factor-alphaConceptsChronic kidney diseaseTumor necrosis factorPlasma FGF23Kidney diseaseFGF23 expressionFGF23 levelsNecrosis factorGrowth factor 23 levelsFibroblast growth factor 23Inflammatory cytokines tumor necrosis factorCytokines tumor necrosis factorInflammatory bowel diseaseGrowth factor 23Normal kidney functionIL10-deficient micePopulation-based cohortAntibody-mediated neutralizationOrphan nuclear receptor Nurr1Nuclear receptor Nurr1Cause mortalityRenal inflammationTNF neutralizationBowel diseaseFactor 23Kidney functionA preliminary survey of practice patterns across several European kidney stone centers and a call for action in developing shared practice
Ferraro P, Arrabal-Polo M, Capasso G, Croppi E, Cupisti A, Ernandez T, Fuster D, Galan J, Grases F, Hoorn E, Knauf F, Letavernier E, Mohebbi N, Moochhala S, Petkova K, Pozdzik A, Sayer J, Seitz C, Strazzullo P, Trinchieri A, Vezzoli G, Vitale C, Vogt L, Unwin R, Bonny O, Gambaro G. A preliminary survey of practice patterns across several European kidney stone centers and a call for action in developing shared practice. Urolithiasis 2019, 47: 219-224. PMID: 30848320, DOI: 10.1007/s00240-019-01119-z.Peer-Reviewed Original ResearchConceptsKidney Stone CenterStone CenterPractice patternsUrine samplesRecruitment of patientsEvidence-based approachMore patientsInterventional studyReferral criteriaStone eventsUrine collectionKind of imagingClinical careBlood samplesFormal followMonthsPatientsVoluntary online questionnaireClinical fieldBaselineLaboratory analysisPilot surveyOnline questionnaireNephrolithiasisChallenges to hypertension and diabetes management in rural Uganda: a qualitative study with patients, village health team members, and health care professionals
Chang H, Hawley NL, Kalyesubula R, Siddharthan T, Checkley W, Knauf F, Rabin TL. Challenges to hypertension and diabetes management in rural Uganda: a qualitative study with patients, village health team members, and health care professionals. International Journal For Equity In Health 2019, 18: 38. PMID: 30819193, PMCID: PMC6394065, DOI: 10.1186/s12939-019-0934-1.Peer-Reviewed Original ResearchConceptsHealth care professionalsVillage health team membersHealth team membersCare professionalsRural UgandaPrevalence of hypertensionCommunity health workersIndividual health care professionalsUgandan health care systemHealth care systemLifestyle factorsDiabetes careDM managementHealth workersHypertensionPatientsNakaseke districtHealth system reformPreventable aspectsMedication accessibilityCare systemLack of awarenessRural settingsPotential roleDiabetes
2016
Oxalate, inflammasome, and progression of kidney disease
Ermer T, Eckardt KU, Aronson PS, Knauf F. Oxalate, inflammasome, and progression of kidney disease. Current Opinion In Nephrology & Hypertension 2016, 25: 363-371. PMID: 27191349, PMCID: PMC4891250, DOI: 10.1097/mnh.0000000000000229.Peer-Reviewed Reviews, Practice Guidelines, Standards, and Consensus StatementsConceptsChronic kidney diseaseProgressive renal failureRenal inflammationRenal failurePlasma oxalateKidney diseaseInflammasome activationElevated plasma oxalate levelsNOD-like receptor familyProgressive renal damageGlomerular filtration rateMore rapid progressionWarrants clinical trialsPlasma oxalate levelsRenal damageEnteric hyperoxaluriaMacrophage infiltrationIL-1βFiltration rateClinical trialsRapid progressionInflammasome proteinsMice protectsUrinary oxalatePyrin domain
2013
Dabigatran and Kidney Disease: A Bad Combination
Knauf F, Chaknos CM, Berns JS, Perazella MA. Dabigatran and Kidney Disease: A Bad Combination. Clinical Journal Of The American Society Of Nephrology 2013, 8: 1591-1597. PMID: 23868901, PMCID: PMC3805067, DOI: 10.2215/cjn.01260213.Peer-Reviewed Original ResearchConceptsAnticoagulant effectPharmacokinetic profileOral direct thrombin inhibitorContinuous renal replacement therapyRoutine laboratory monitoringSerious bleeding eventsHigh bleeding riskReduced kidney functionRenal replacement therapyDirect thrombin inhibitorDrug Administration approvalLaboratory monitoring testsBleeding eventsBleeding riskSerious bleedingThromboembolic complicationsDose adjustmentHemodialysis cathetersKidney functionKidney diseaseReplacement therapyLaboratory monitoringAdministration approvalClinical indicationsDrug levels