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https://www.readbyqxmd.com/read/28811528/prenatal-hypoxia-leads-to-hypertension-renal-renin-angiotensin-system-activation-and-exacerbates-salt-induced-pathology-in-a-sex-specific-manner
#1
S L Walton, H Bielefeldt-Ohmann, R R Singh, J Li, T M Paravicini, M H Little, K M Moritz
Prenatal hypoxia is associated with growth restriction and adverse cardiovascular outcomes. Here, we describe renal and cardiovascular outcomes in ageing mouse offspring prenatally exposed to hypoxia (12% O2) from embryonic day 14.5 until birth. At 12 months of age, both male and female offspring exposed to prenatal hypoxia had elevated mean arterial pressure. Glomerular number was reduced by 25% in hypoxia-exposed male, but not female, offspring and this was associated with increased urinary albumin excretion, glomerular hypertrophy and renal fibrosis...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28804978/birthweight-and-serum-uric-acid-in-american-adolescents
#2
Erika T Rhone, J Bryan Carmody
Elevated serum uric acid is associated with hypertension and chronic kidney disease. We evaluated the relationship between birthweight and uric acid in a nationally representative sample of 5390 US adolescents aged 12-15 in the National Health and Nutrition Examination Survey from 1999 to 2012. There was an inverse association between birthweight and uric acid after adjustment for sex, age, race, obesity, and dietary sodium intake. Each 1 kg increase in birthweight was associated with decreased uric acid by 0...
August 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28802883/neoadjuvant-therapy-for-localized-and-locally-advanced-renal-cell-carcinoma
#3
REVIEW
Ahmet Bindayi, Zachary A Hamilton, Michelle L McDonald, Kendrick Yim, Frederick Millard, Rana R McKay, Steven C Campbell, Brian I Rini, Ithaar H Derweesh
Neoadjuvant Targeted Molecular Therapy in the setting of localized and locally advanced renal cell carcinoma has emerged as a strategy to render primary renal tumors amenable to planned surgical resection in settings where radical resection or nephron-sparing surgery was not thought to be safe or feasible. Presurgical tumor reduction has been demonstrated in a number of studies including a recently published randomized double-blind placebo-controlled study, and an expanding body of literature suggests benefit in select patients...
August 9, 2017: Urologic Oncology
https://www.readbyqxmd.com/read/28794066/insights-into-cellular-and-molecular-basis-for-urinary-tract-infection-in-autosomal-dominant-polycystic-kidney-disease
#4
Chao Gao, Long Zhang, Ye Zhang, Darren Paul Wallace, Reynold I Lopez-Soler, Paul J Higgins, Wenzheng Zhang
Urinary tract infection (UTI) is a broad term referring to an infection of the kidneys, ureters, bladder and/or urethra. Due to its prevalence, frequent recurrence and rising resistance to antibiotics, UTI has become a challenge in clinical practice. Autosomal dominant polycystic kidney disease (ADPKD) is the most common monogenic disorder of the kidney and is characterized by the growth of fluid-filled cysts in both kidneys. Progressive cystic enlargement, inflammation and interstitial fibrosis result in nephron loss with subsequent decline in kidney function...
August 9, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28791668/obesity-related-glomerulopathy-pathogenesis-pathologic-clinical-characteristics-and-treatment
#5
REVIEW
Tianhua Xu, Zitong Sheng, Li Yao
In light of the rapid increase in the number of obesity incidences worldwide, obesity has become an independent risk factor for chronic kidney disease. Obesity-related glomerulopathy (ORG) is characterized by glomerulomegaly in the presence or absence of focal and segmental glomerulosclerosis lesions. IgM and complement 3 (C3) nonspecifically deposit in lesions without immune-complex-type deposits during ORG immunofluorescence. ORG-associated glomerulomegaly and focal and segmental glomerulosclerosis can superimpose on other renal pathologies...
August 8, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28790143/structural-and-functional-changes-in-human-kidneys-with-healthy-aging
#6
REVIEW
Musab S Hommos, Richard J Glassock, Andrew D Rule
Aging is associated with significant changes in structure and function of the kidney, even in the absence of age-related comorbidities. On the macrostructural level, kidney cortical volume decreases, surface roughness increases, and the number and size of simple renal cysts increase with age. On the microstructural level, the histologic signs of nephrosclerosis (arteriosclerosis/arteriolosclerosis, global glomerulosclerosis, interstitial fibrosis, and tubular atrophy) all increase with age. The decline of nephron number is accompanied by a comparable reduction in measured whole-kidney GFR...
August 8, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28774704/lim-kinase-function-and-renal-growth-potential-role-for-lim-kinases-in-fetal-programming-of-kidney-development
#7
Alexander J Sparrow, Dylan Sweetman, Simon J M Welham
AIMS: Maternal dietary restriction during pregnancy impairs nephron development and results in offspring with fewer nephrons. Cell turnover in the early developing kidney is altered by exposure to maternal dietary restriction and may be regulated by the LIM-kinase family of enzymes. We set out to establish whether disturbance of LIM-kinase activity might play a role in the impairment of nephron formation. MAIN METHODS: E12.5 metanephric kidneys and HK2 cells were grown in culture with the pharmacological LIM-kinase inhibitor BMS5...
July 31, 2017: Life Sciences
https://www.readbyqxmd.com/read/28760814/sall1-nurd-interaction-regulates-multipotent-nephron-progenitors-and-is-required-for-loop-of-henle-formation
#8
Jeannine M Basta, Lynn Robbins, Darcy R Denner, Grant R Kolar, Michael Rauchman
The formation of the proper number of nephrons requires a tightly regulated balance between renal progenitor cell self-renewal and differentiation. The molecular pathways that regulate the transition from renal progenitor to renal vesicle are not well understood. Here we show that Sall1interacts with the Nucleosome Remodeling and Deacetylase Complex (NuRD) to inhibit premature differentiation of nephron progenitor cells. Disruption of Sall1-NuRD in vivo in knock-in mice (ΔSRM) resulted in accelerated differentiation of nephron progenitors and bilateral renal hypoplasia...
July 31, 2017: Development
https://www.readbyqxmd.com/read/28753888/intraoperative-imaging-techniques-to-support-complete-tumor-resection-in-partial-nephrectomy
#9
REVIEW
Marlène C H Hekman, Mark Rijpkema, Johan F Langenhuijsen, Otto C Boerman, Egbert Oosterwijk, Peter F A Mulders
CONTEXT: With more complex kidney tumors treated by nephron-sparing surgery (NSS), complete tumor resection is becoming increasingly challenging. Intraoperative imaging may improve the establishment of negative surgical margins. OBJECTIVE: To discuss intraoperative imaging techniques that may help achieve complete tumor resection in NSS of renal tumors. EVIDENCE ACQUISITION: PubMed was searched for English articles on intraoperative imaging during NSS of renal cell carcinoma published after 2005, and a reference search of retrieved articles was performed...
May 12, 2017: European Urology Focus
https://www.readbyqxmd.com/read/28753855/ischemia-and-functional-recovery-from-partial-nephrectomy-refined-perspectives
#10
Wen Dong, Jitao Wu, Chalairat Suk-Ouichai, Elvis Caraballo Antonio, Erick M Remer, Jianbo Li, Joseph Zabell, Sudhir Isharwal, Steven C Campbell
BACKGROUND: Nephron mass preservation is a key determinant of functional outcomes after partial nephrectomy (PN), while ischemia plays a secondary role. Analyses focused specifically on recovery of the operated kidney appear to be most informative, yet have only included limited numbers of patients. OBJECTIVE: To evaluate the relative impact of parenchymal preservation and ischemia on functional recovery after PN using a more robust cohort allowing for more refined perspectives about ischemia...
March 3, 2017: European Urology Focus
https://www.readbyqxmd.com/read/28735987/estimated-nephron-number-of-the-donor-kidney-impact-on-allograft-kidney-outcomes
#11
T Schachtner, P Reinke
BACKGROUND: Low birth weights have been associated with a reduction in nephron number with compensatory hypertrophy of existing glomeruli. The impact of donor birth weight as an estimate of nephron number on allograft function, however, has not been examined. METHODS: We collected donor birth weight, kidney weight, and volume from 91 living kidney donor-recipient pairs before nephrectomy and after 12, 36, and 60 months. Nephron number was calculated from donor birth weight and age...
July 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28729036/molecular-mechanisms-of-renal-aging
#12
REVIEW
Roland Schmitt, Anette Melk
Epidemiologic, clinical, and molecular evidence suggest that aging is a major contributor to the increasing incidence of acute kidney injury and chronic kidney disease. The aging kidney undergoes complex changes that predispose to renal pathology. The underlying molecular mechanisms could be the target of therapeutic strategies in the future. Here, we summarize recent insight into cellular and molecular processes that have been shown to contribute to the renal aging phenotype.The main clinical finding of renal aging is the decrease in glomerular filtration rate, and its structural correlate is the loss of functioning nephrons...
July 17, 2017: Kidney International
https://www.readbyqxmd.com/read/28722118/at2-r-deficiency-mediated-podocyte-loss-via-activation-of-ectopic-hedgehog-interacting-protein-hhip-gene-expression
#13
Min-Chun Liao, Xin-Ping Zhao, Shiao-Ying Chang, Chao-Sheng Lo, Isabelle Chenier, Tomoko Takano, Julie R Ingelfinger, Shao-Ling Zhang
Angiotensin II type 2 receptor (AT2 R) deficiency in AT2 R knockout (KO) mice has been linked to congenital abnormalities of the kidney and urinary tract; however, the mechanisms by which this occurs are poorly understood. In this study, we examined whether AT2 R deficiency impaired glomerulogenesis and mediated podocyte loss/dysfunction in vivo and in vitro. Nephrin-cyan fluorescent protein (CFP)-transgenic (Tg) and Nephrin/AT2 RKO mice were used to assess glomerulogenesis, while wild-type and AT2 RKO mice were used to evaluate maturation of podocyte morphology/function...
July 19, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28711069/preterm-birth-and-its-impact-on-renal-health
#14
Valerie A Luyckx
Preterm birth occurs in approximately 10% of all births worldwide. Preterm infants have reduced nephron numbers at birth in proportion to gestational age, and are at increased risk of neonatal acute kidney injury as well as higher blood pressure, proteinuria, and chronic kidney disease later in life. Rapid catch-up growth in preterm infants, especially if resulting in obesity, is a risk factor for end-stage kidney disease among children with proteinuric renal disease. Preterm birth, however, is a risk factor not only for the infant because mothers who deliver preterm have an increased risk of having subsequent preterm deliveries as well as hypertension, cardiovascular disease, and renal disease later in life...
July 2017: Seminars in Nephrology
https://www.readbyqxmd.com/read/28706894/developmental-origins-and-nephron-endowment-in-hypertension
#15
REVIEW
Shari Gurusinghe, Anita Tambay, Christine B Sethna
Primary hypertension continues to be one of the main risk factors for cardiovascular disease worldwide. A stable intrauterine environment is critical for the future development and health of the fetus. The developing kidney has been found to be especially vulnerable during this time period, and epidemiological studies have demonstrated that an adverse in utero environment is associated with an increased risk of hypertension and chronic kidney disease. Macro- and micronutrient deficiencies as well as exposure to tobacco, alcohol, and certain medications during gestation have been shown to negatively impact nephrogenesis and reduce one's nephron number...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28683731/nephron-development-and-extrarenal-features-in-a-child-with-congenital-nephrotic-syndrome-caused-by-null-lamb2-mutations
#16
Jiro Kino, Hiroyasu Tsukaguchi, Takahisa Kimata, Huan Thanh Nguyen, Yorika Nakano, Noriko Miyake, Naomichi Matsumoto, Kazunari Kaneko
BACKGROUND: Congenital nephrotic syndrome (CNS) is a rare disorder caused by various structural and developmental defects of glomeruli. It occurs typically as an isolated kidney disorder but associates sometimes with other systemic, extrarenal manifestations. CASE PRESENTATIONS: An infant presented with severe CNS, which progressed rapidly to renal failure at age of 3 months and death at 27 months. The clinical phenotypes and genetic causes were studied, including the renal pathology at autopsy...
July 6, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28614683/single-nephron-glomerular-filtration-rate-in-healthy-adults
#17
Aleksandar Denic, Jerry Mathew, Lilach O Lerman, John C Lieske, Joseph J Larson, Mariam P Alexander, Emilio Poggio, Richard J Glassock, Andrew D Rule
BACKGROUND: The glomerular filtration rate (GFR) assesses the function of all nephrons, and the single-nephron GFR assesses the function of individual nephrons. How the single-nephron GFR relates to demographic and clinical characteristics and kidney-biopsy findings in humans is unknown. METHODS: We identified 1388 living kidney donors at the Mayo Clinic and the Cleveland Clinic who underwent a computed tomographic (CT) scan of the kidney with the use of contrast material and an iothalamate-based measurement of the GFR during donor evaluation and who underwent a kidney biopsy at donation...
June 15, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28570550/dissection-and-culture-of-mouse-embryonic-kidney
#18
Bejan Aresh, Christiane Peuckert
The goal of this protocol is to describe a method for the dissection, isolation, and culture of mouse metanephric rudiments. During mammalian kidney development, the two progenitor tissues, the ureteric bud and the metanephric mesenchyme, communicate and reciprocally induce cellular mechanisms to eventually form the collecting system and the nephrons of the kidney. As mammalian embryos grow intrauterine and therefore are inaccessible to the observer, an organ culture has been developed. With this method, it is possible to study epithelial-mesenchymal interactions and cellular behavior during kidney organogenesis...
May 17, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28490528/combining-new-tools-to-assess-renal-function-and-morphology-a-holistic-approach-to-study-the-effects-of-aging-and-a-congenital-nephron-deficit
#19
Stefania Geraci, Jorge Chacón-Caldera, Luise Anne Cullen-McEwen, Lothar R Schad, Carsten Sticht, Victor G Puelles, John F Bertram, Norbert Gretz
Recently, new methods for assessing renal function in conscious mice (transcutaneous assessment) and for counting and sizing all glomeruli in whole kidneys (MRI) were described. In the present study, these methods were used to assess renal structure and function in aging mice, and in mice born with a congenital low nephron endowment. Age-related nephron loss was analysed in adult C57BL/6 mice (10-50 weeks of age) and congenital nephron deficit was assessed in glial cell line-derived neurotrophic factor heterozygous (GDNF HET) null mutant mice...
May 10, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28481398/evolutionary-trade-offs-in-kidney-injury-and-repair
#20
REVIEW
Yutian Lei, Hans-Joachim Anders
Evolutionary medicine has proven helpful to understand the origin of human disease, e.g. in identifying causal roles of recent environmental changes impacting on human physiology (environment-phenotype mismatch). In contrast, diseases affecting only a limited number of members of a species often originate from evolutionary trade-offs for usually physiologic adaptations assuring reproductive success in the context of extrinsic threats. For example, the G1 and G2 variants of the APOL1 gene supporting control of Trypanosoma infection come with the trade-off that they promote the progression of kidney disease...
May 8, 2017: Histology and Histopathology
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