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Nagami GT, Kraut JA. The Role of the Endocrine System in the Regulation of Acid-Base Balance by the Kidney and the Progression of Chronic Kidney Disease. Int J Mol Sci 2024; 25:2420. [PMID: 38397097 PMCID: PMC10889389 DOI: 10.3390/ijms25042420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 02/07/2024] [Accepted: 02/16/2024] [Indexed: 02/25/2024] Open
Abstract
Systemic acid-base status is primarily determined by the interplay of net acid production (NEAP) arising from metabolism of ingested food stuffs, buffering of NEAP in tissues, generation of bicarbonate by the kidney, and capture of any bicarbonate filtered by the kidney. In chronic kidney disease (CKD), acid retention may occur when dietary acid production is not balanced by bicarbonate generation by the diseased kidney. Hormones including aldosterone, angiotensin II, endothelin, PTH, glucocorticoids, insulin, thyroid hormone, and growth hormone can affect acid-base balance in different ways. The levels of some hormones such as aldosterone, angiotensin II and endothelin are increased with acid accumulation and contribute to an adaptive increase in renal acid excretion and bicarbonate generation. However, the persistent elevated levels of these hormones can damage the kidney and accelerate progression of CKD. Measures to slow the progression of CKD have included administration of medications which inhibit the production or action of deleterious hormones. However, since metabolic acidosis accompanying CKD stimulates the secretion of several of these hormones, treatment of CKD should also include administration of base to correct the metabolic acidosis.
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Affiliation(s)
- Glenn T. Nagami
- Nephrology Section, VA Greater Los Angeles Healthcare System, Los Angeles, CA 90073, USA;
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
| | - Jeffrey A. Kraut
- Nephrology Section, VA Greater Los Angeles Healthcare System, Los Angeles, CA 90073, USA;
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA
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2
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Moyer J, Wilson MW, Sorrentino TA, Santandreu A, Chen C, Hu D, Kerdok A, Porock E, Wright N, Ly J, Blaha C, Frassetto LA, Fissell WH, Vartanian SM, Roy S. Renal Embolization-Induced Uremic Swine Model for Assessment of Next-Generation Implantable Hemodialyzers. Toxins (Basel) 2023; 15:547. [PMID: 37755973 PMCID: PMC10536310 DOI: 10.3390/toxins15090547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 08/22/2023] [Accepted: 08/30/2023] [Indexed: 09/28/2023] Open
Abstract
Reliable models of renal failure in large animals are critical to the successful translation of the next generation of renal replacement therapies (RRT) into humans. While models exist for the induction of renal failure, none are optimized for the implantation of devices to the retroperitoneal vasculature. We successfully piloted an embolization-to-implantation protocol enabling the first implant of a silicon nanopore membrane hemodialyzer (SNMHD) in a swine renal failure model. Renal arterial embolization is a non-invasive approach to near-total nephrectomy that preserves retroperitoneal anatomy for device implants. Silicon nanopore membranes (SNM) are efficient blood-compatible membranes that enable novel approaches to RRT. Yucatan minipigs underwent staged bilateral renal arterial embolization to induce renal failure, managed by intermittent hemodialysis. A small-scale arteriovenous SNMHD prototype was implanted into the retroperitoneum. Dialysate catheters were tunneled externally for connection to a dialysate recirculation pump. SNMHD clearance was determined by intermittent sampling of recirculating dialysate. Creatinine and urea clearance through the SNMHD were 76-105 mL/min/m2 and 140-165 mL/min/m2, respectively, without albumin leakage. Normalized creatinine and urea clearance measured in the SNMHD may translate to a fully implantable clinical-scale device. This pilot study establishes a path toward therapeutic testing of the clinical-scale SNMHD and other implantable RRT devices.
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Affiliation(s)
- Jarrett Moyer
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
- Silicon Kidney, San Ramon, CA 94583, USA
| | - Mark W. Wilson
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
| | - Thomas A. Sorrentino
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
| | - Ana Santandreu
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
| | - Caressa Chen
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
| | - Dean Hu
- Outset Medical, San Jose, CA 95134, USA
| | | | - Edward Porock
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
| | - Nathan Wright
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
- Silicon Kidney, San Ramon, CA 94583, USA
| | - Jimmy Ly
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
- Silicon Kidney, San Ramon, CA 94583, USA
| | - Charles Blaha
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
- Silicon Kidney, San Ramon, CA 94583, USA
| | - Lynda A. Frassetto
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
| | - William H. Fissell
- Silicon Kidney, San Ramon, CA 94583, USA
- Division of Nephrology & Hypertension, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Shant M. Vartanian
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
| | - Shuvo Roy
- Departments of Bioengineering & Therapeutic Sciences, Surgery, Medicine, and Radiology & Biomedical Imaging, University of California, San Francisco, CA 94143, USA; (J.M.)
- Silicon Kidney, San Ramon, CA 94583, USA
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Kim EJ, Chen C, Gologorsky R, Santandreu A, Torres A, Wright N, Goodin MS, Moyer J, Chui BW, Blaha C, Brakeman P, Vartanian S, Tang Q, David Humes H, Fissell WH, Roy S. Feasibility of an implantable bioreactor for renal cell therapy using silicon nanopore membranes. Nat Commun 2023; 14:4890. [PMID: 37644033 PMCID: PMC10465514 DOI: 10.1038/s41467-023-39888-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 07/03/2023] [Indexed: 08/31/2023] Open
Abstract
The definitive treatment for end-stage renal disease is kidney transplantation, which remains limited by organ availability and post-transplant complications. Alternatively, an implantable bioartificial kidney could address both problems while enhancing the quality and length of patient life. An implantable bioartificial kidney requires a bioreactor containing renal cells to replicate key native cell functions, such as water and solute reabsorption, and metabolic and endocrinologic functions. Here, we report a proof-of-concept implantable bioreactor containing silicon nanopore membranes to offer a level of immunoprotection to human renal epithelial cells. After implantation into pigs without systemic anticoagulation or immunosuppression therapy for 7 days, we show that cells maintain >90% viability and functionality, with normal or elevated transporter gene expression and vitamin D activation. Despite implantation into a xenograft model, we find that cells exhibit minimal damage, and recipient cytokine levels are not suggestive of hyperacute rejection. These initial data confirm the potential feasibility of an implantable bioreactor for renal cell therapy utilizing silicon nanopore membranes.
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Affiliation(s)
- Eun Jung Kim
- University of California, San Francisco, CA, USA
| | - Caressa Chen
- University of California, San Francisco, CA, USA
| | | | | | | | - Nathan Wright
- University of California, San Francisco, CA, USA
- Silicon Kidney LLC, San Ramon, CA, USA
| | | | | | | | - Charles Blaha
- University of California, San Francisco, CA, USA
- Silicon Kidney LLC, San Ramon, CA, USA
| | | | | | - Qizhi Tang
- University of California, San Francisco, CA, USA
| | - H David Humes
- University of Michigan, Ann Arbor, MI, USA
- Innovative Biotherapies Inc, Ann Arbor, MI, USA
| | - William H Fissell
- Silicon Kidney LLC, San Ramon, CA, USA
- Vanderbilt University Medical Center, Nashville, TN, USA
| | - Shuvo Roy
- University of California, San Francisco, CA, USA.
- Silicon Kidney LLC, San Ramon, CA, USA.
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Laguerre M, Bouvier N, Guleryuz K, Doerfler A, Parienti JJ, Ait Said K, Tillou X. Sexual Dysfunction Improvement after Kidney Transplantation: A Prospective Study in Men and Women. INTERNATIONAL JOURNAL OF SEXUAL HEALTH : OFFICIAL JOURNAL OF THE WORLD ASSOCIATION FOR SEXUAL HEALTH 2020; 33:1-8. [PMID: 38596472 PMCID: PMC10807801 DOI: 10.1080/19317611.2020.1842575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 10/18/2020] [Accepted: 10/20/2020] [Indexed: 04/11/2024]
Abstract
Objectives To assess the influence of renal transplantation on sexual function. Methods Prospective study including all patients who underwent a kidney transplantation between January 2013 and February 2015. Sexual function was measured before, at 6, 12 months after transplantation and at the last follow-up with IIEF (International Index of Erectile Function) and FSFI (Female Sexual Function Index questionnaires). Results Median FSFI total score significantly increased in women at 6 months. In men, median IIEF total score significantly increased at one year. Conclusion Our study provides evidence suggesting that successful transplantation can improve normal sexual function in both men and women with chronic kidney failure.
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Affiliation(s)
- Mélanie Laguerre
- Department of Urology and transplantation of CHU of CAEN, CHRU de Caen, Caen, France
| | - Nicolas Bouvier
- Department of Nephrology and transplantation of CHU of CAEN, CHRU de Caen, Caen, France
| | - Kerem Guleryuz
- Department of Urology and transplantation of CHU of CAEN, CHRU de Caen, Caen, France
| | - Arnaud Doerfler
- Department of Urology and transplantation of CHU of CAEN, CHRU de Caen, Caen, France
| | | | - Khelifa Ait Said
- Department of Urology and transplantation of CHU of CAEN, CHRU de Caen, Caen, France
| | - Xavier Tillou
- Department of Urology and transplantation of CHU of CAEN, CHRU de Caen, Caen, France
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5
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Ali S, Dave NN. Sexual Dysfunction in Women With Kidney Disease. Adv Chronic Kidney Dis 2020; 27:506-515. [PMID: 33328067 DOI: 10.1053/j.ackd.2020.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/02/2020] [Accepted: 07/15/2020] [Indexed: 12/23/2022]
Abstract
Sexual health is inversely associated with estimated glomerular filtration rate and is associated with adverse cardiovascular outcomes, depression, poor self-image, and impaired quality of life. Many women with chronic kidney disease (CKD) and ESKD experience symptoms of sexual dysfunction which is underrecognized secondary to a variety of factors including physicians' discomfort in discussing sexual health, patients' reluctance to bring up sexual health, difficulty in the assessment of sexual health in comparison to men, and the overall lack of well-conducted clinical studies in women. The pathophysiology is not fully understood but likely involves changes in sex hormones throughout the hypothalamic-pituitary-ovarian axis. Proper evaluation of this axis is necessary as treatment is tailored to these findings and can improve outcomes. A comprehensive assessment of sexual dysfunction inclusive of women with varying gender identification and sexual orientation, partnered with recognition and treatment of contributing factors as well as identifying the underlying cause, is paramount. With the lack of studies, particularly in women with CKD, treatment options, in some cases, can be considered unchartered territory. In this article, we will review available evidence on the pathophysiology, clinical manifestations, and treatment for sexual dysfunction in women with CKD and ESKD.
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Caretto A, Caldara R, Castiglioni MT, Scavini M, Secchi A. Pregnancy after pancreas-kidney transplantation. J Nephrol 2020; 33:1009-1018. [DOI: 10.1007/s40620-020-00860-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 09/07/2020] [Indexed: 01/06/2023]
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Szpotanska-Sikorska M, Mazanowska N, Kociszewska-Najman B, Wielgos M, Pietrzak B. Unintended pregnancies and family planning among women after kidney or liver transplantation. J Matern Fetal Neonatal Med 2018; 33:1346-1352. [PMID: 30251568 DOI: 10.1080/14767058.2018.1518420] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Background: To evaluate the incidence of unplanned pregnancies in female organ transplant recipients.Methods: In a single-center cross-sectional study 252 women aged 18-45 years who underwent kidney or liver transplantation were asked to fill in a survey form.Results: 217 (86%) women were enrolled in the study. Fifty-three percent of women declared 181 pregnancies, of which 30% (54/181) were unplanned. Women more frequently consulted their conception with a doctor post-transplantation (74 versus 88%, p = .064). The number of unplanned pregnancies decreased post-transplantation (34 versus 20%, p = .051). The mean time elapsed from an organ transplant to unintended conception was 27.0 ± 12.5 (3.0-63.0) months. Women with longer (>24 months) rather than shorter (≤24 months) time elapsed from the transplant became pregnant less frequently (38 versus 15%, p = .060). In 70% (38/54) of unplanned pregnancies women did not use any birth control. All cases of conceptions within the post-transplant year were unintentional. Every third woman, who underwent the transplantation up to 1 year before the study enrolment, was unaware of the necessity to prevent the pregnancy.Conclusions: Although unwanted pregnancies occur more frequently in the early post-transplant period, it seems that women after kidney or liver transplantation seem to plan their pregnancies more carefully.
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Affiliation(s)
| | - Natalia Mazanowska
- 1st Department of Obstetrics and Gynaecology, Medical University of Warsaw, Warsaw, Poland
| | | | - Miroslaw Wielgos
- 1st Department of Obstetrics and Gynaecology, Medical University of Warsaw, Warsaw, Poland
| | - Bronislawa Pietrzak
- 1st Department of Obstetrics and Gynaecology, Medical University of Warsaw, Warsaw, Poland
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Hassan K, Elimeleh Y, Shehadeh M, Hassan F, Rubinchik I. Associations of Peritoneal Glucose Load With Male Sexual Dysfunction and Depression in Peritoneal Dialysis Patients. Ther Apher Dial 2018; 22:380-388. [DOI: 10.1111/1744-9987.12663] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 10/31/2017] [Accepted: 12/01/2017] [Indexed: 11/26/2022]
Affiliation(s)
- Kamal Hassan
- Faculty of Medicine in the Galilee; Bar-Ilan University; Safed Israel
- Department of Nephrology and Hypertension; Galilee Medical Center; Nahariya Israel
| | - Yotam Elimeleh
- Faculty of Medicine in the Galilee; Bar-Ilan University; Safed Israel
| | - Mona Shehadeh
- Biochemistry Laboratory; Galilee Medical Center; Nahariya Israel
| | - Fadi Hassan
- Internal Medicine Department E; Galilee Medical Center; Nahariya Israel
| | - Irina Rubinchik
- Department of Nephrology and Hypertension; Galilee Medical Center; Nahariya Israel
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Hassan K, Elimeleh Y, Shehadeh M, Fadi H, Rubinchik I. The relationship between hydration status, male sexual dysfunction and depression in hemodialysis patients. Ther Clin Risk Manag 2018; 14:523-529. [PMID: 29559788 PMCID: PMC5856048 DOI: 10.2147/tcrm.s147723] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Background Disturbances in sexual function are common among dialysis patients. Normal erections require a complex balance of physiological, psychological, emotional, hormonal, neurological and vascular factors. This study examined a possible association of overhydration (OH) with male sexual dysfunction and depression in hemodialysis (HD) patients. Patients and methods This cross-sectional study assessed hydration status by whole-body bioimpedance spectroscopy in patients on maintenance HD for more than 12 months. Patients were categorized according to OH to extracellular water (ECW) ratio: OH/ECW ratio >0.15 and OH/ECW ratio ≤0.15. Sexual function was assessed using the International Index of Erectile Function (IIEF) score. Psychological status was evaluated using the Beck Depression Inventory (BDI) score. Serum sex hormones were determined. Results Of 39 stable participants on HD, 53.8% were overhydrated (OH/ECW ratio >0.15) and 46.2% not overhydrated (OH/ECW ratio ≤0.15). Of participants with OH/ECW ratio >0.15, 85.7% had mild to severe ED, and 71.4% had abnormal BDI scores, ranging from mild mood disturbance to severe depression. Compared to patients with OH/ECW ratio ≤0.15, BDI scores, serum estradiol and plasma hsCRP were higher (18.48±8.34 vs 10.61±5.46, p<0.001; 140.10±44.51 vs 126.10±32.26, p=0.034; and, 17.70±12.14 vs 9.76±8.79, p=0.013; respectively) in those with OH/ECW ratio >0.15, while their IIEF score, serum total testosterone and dehydroepiandrosterone (DHEA) were lower (12.81±7.31 vs 41.44±23.79, p<0.001; 8.97±5.43 vs 14.10±8.30, p=0.013; and 85.31±55.14 vs 133.3±95.48, p=0.029; respectively). The OH/ECW ratio correlated inversely with the IIEF score (r=−0.69, p<0.001) and positively with BDI scores (r=0.64, p<0.001). IIEF scores were inversely correlated with BDI scores (r=−0.54, p<0.001). Conclusion OH in HD patients was found to be associated with a higher prevalence of sexual dysfunction and depression, lower serum levels of total testosterone and DHEA, and higher levels of serum estradiol.
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Affiliation(s)
- Kamal Hassan
- Faculty of Medicine in the Galilee, Bar-Ilan University, Safed, Israel.,Department of Nephrology and Hypertension, Galilee Medical Center, Nahariya, Israel
| | - Yotam Elimeleh
- Faculty of Medicine in the Galilee, Bar-Ilan University, Safed, Israel
| | - Mona Shehadeh
- Biochemistry Laboratory, Galilee Medical Center, Nahariya, Israel
| | - Hassan Fadi
- Internal Medicine Department E, Galilee Medical Center, Nahariya, Israel
| | - Irina Rubinchik
- Department of Nephrology and Hypertension, Galilee Medical Center, Nahariya, Israel
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Normand G, Brunner F, Badet L, Buron F, Catton M, Massardier J, Esposito L, Grimbert P, Mourad G, Serre JE, Caillard S, Karam G, Cantarovich D, Morelon E, Thaunat O. Pregnancy outcomes in simultaneous pancreas and kidney transplant recipients: a national French survey study. Transpl Int 2017; 30:893-902. [DOI: 10.1111/tri.12983] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 11/20/2016] [Accepted: 05/08/2017] [Indexed: 11/27/2022]
Affiliation(s)
- Gabrielle Normand
- Department of Transplantation, Nephrology and Clinical Immunology; Hospices Civils de Lyon; Lyon France
| | - Flora Brunner
- Department of Transplantation, Nephrology and Clinical Immunology; Hospices Civils de Lyon; Lyon France
| | - Lionel Badet
- Department of Urology and Transplant Surgery; Hospices Civils de Lyon; Lyon France
| | - Fanny Buron
- Department of Transplantation, Nephrology and Clinical Immunology; Hospices Civils de Lyon; Lyon France
| | - Marielle Catton
- Department of Gynecology and Obstetrics; Femme-Mère Enfants Hospital; Hospices Civils de Lyon; Lyon France
| | - Jérôme Massardier
- Department of Gynecology and Obstetrics; Femme-Mère Enfants Hospital; Hospices Civils de Lyon; Lyon France
| | - Laure Esposito
- Department of Nephrology and Organ Transplantation; CHU Rangueil; Toulouse France
| | - Philippe Grimbert
- Nephrology and Renal Transplantation and CIC-BT 504 Department; Henri Mondor Hospital; APHP; Créteil France
- INSERM U955; Paris Est University; Créteil France
| | - Georges Mourad
- Department of Nephrology; Hospital Lapeyronie; CHU Montpellier; Montpellier France
| | - Jean E. Serre
- Department of Nephrology; Hospital Lapeyronie; CHU Montpellier; Montpellier France
| | - Sophie Caillard
- Department of Nephrology-Transplantation; Strasbourg University Hospital; Strasbourg France
| | - Georges Karam
- Institute of Transplantation Urology and Nephrology (ITUN); Nantes University Hospital; Nantes France
| | - Diego Cantarovich
- Institute of Transplantation Urology and Nephrology (ITUN); Nantes University Hospital; Nantes France
| | - Emmanuel Morelon
- Department of Transplantation, Nephrology and Clinical Immunology; Hospices Civils de Lyon; Lyon France
- International Center for Infectiology Research (CIRI); French National Institute of Health and Medical Research (INSERM) Unit 1111; Ecole Normale Supérieure de Lyon; CNRS, UMR 5308; Claude Bernard Lyon 1 University; Lyon France
| | - Olivier Thaunat
- Department of Transplantation, Nephrology and Clinical Immunology; Hospices Civils de Lyon; Lyon France
- International Center for Infectiology Research (CIRI); French National Institute of Health and Medical Research (INSERM) Unit 1111; Ecole Normale Supérieure de Lyon; CNRS, UMR 5308; Claude Bernard Lyon 1 University; Lyon France
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11
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McKay DB, Adams PL, Bumgardner GL, Davis CL, Fine RN, Krams SM, Martinez OM, Murphy B, Pavlakis M, Tolkoff-Rubin N, Sherman MS, Josephson MA. Reproduction and Pregnancy in Transplant Recipients: Current Practices. Prog Transplant 2016; 16:127-32. [PMID: 16789701 DOI: 10.1177/152692480601600206] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Many transplant physicians are faced with questions from their patients about the safety and long-term consequences of pregnancy following transplantation. To better understand how pregnancies are managed and to clarify the outcome of pregnancy after transplantation, a survey questionnaire was developed and mailed to all medical and surgical directors of transplant centers throughout the United States; responses were obtained from 59.1% of the transplant centers. Although many opinions were collected, most respondents conceded that their opinions were based on personal experience rather than evidence-based. The underutilization of existing information was revealing and highlighted a need for an evidence-based approach to care of the pregnant transplant recipient and her offspring. The survey results, reported in this article, led to formation of a consensus conference to determine the optimal approach to pregnant transplant recipients and to define what is currently known and unknown about reproduction and transplantation.
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Affiliation(s)
- Dianne B McKay
- Scripps Clinic and The Scripps Research Institute, La Jolla, Calif, USA
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12
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Initial evidence demonstrating the association between the vascular status in surgically resected renal parenchymal pathology and sexual function. Int J Impot Res 2014; 27:90-4. [PMID: 25471317 DOI: 10.1038/ijir.2014.38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Revised: 08/17/2014] [Accepted: 10/18/2014] [Indexed: 11/08/2022]
Abstract
Our goal is to evaluate the association between histopathology of glomerulosclerosis (GS) and atherosclerosis (AS) in the nephrectomized normal parenchyma together with patients' background, and erectile dysfunction (ED) of patients treated with radical nephrectomy (RN) for renal cell carcinoma (RCC). ED was assessed with the International Index of Erectile Function in 65 patients who were less than age 70 years at the time of questionnaire. Glomeruli status was assessed by the extent of global GS. AS was graded based on lumen occlusion and frequency of involvement. Patients' backgrounds included any comorbidities, post-RN renal insufficiency, tumor pathology, demographics and social status. The presence of diabetes mellitus and lack of a spouse were independent predictors for severe ED, whereas G0/1 AS was an independent predictor for mild/no ED. The extent of global GS was significantly lower in patients with mild/no ED than in other patients. Our study represents the first report identifying healthy arterial status in the renal parenchyma as a significant indicator of favorable erectile function and that the evaluation of AS severity is not a superior indicator of severe ED in the presence of comorbidities or social status among patients treated with RN.
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13
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Sejima T, Honda M, Takenaka A. Renal parenchymal histopathology predicts life-threatening chronic kidney disease as a result of radical nephrectomy. Int J Urol 2014; 22:14-21. [PMID: 25195572 DOI: 10.1111/iju.12612] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2014] [Accepted: 08/03/2014] [Indexed: 01/20/2023]
Abstract
The preoperative prediction of post-radical nephrectomy renal insufficiency plays an important role in the decision-making process regarding renal surgery options. Furthermore, the prediction of both postoperative renal insufficiency and postoperative cardiovascular disease occurrence, which is suggested to be an adverse consequence caused by renal insufficiency, contributes to the preoperative policy decision as well as the precise informed consent for a renal cell carcinoma patient. Preoperative nomograms for the prediction of post-radical nephrectomy renal insufficiency, calculated using patient backgrounds, are advocated. The use of these nomograms together with other types of nomograms predicting oncological outcome is beneficial. Post-radical nephrectomy attending physicians can predict renal insufficiency based on the normal renal parenchymal pathology in addition to preoperative patient characteristics. It is suggested that a high level of global glomerulosclerosis in nephrectomized normal renal parenchyma is closely associated with severe renal insufficiency. Some studies showed that post-radical nephrectomy severe renal insufficiency might have an association with increased mortality as a result of cardiovascular disease. Therefore, such pathophysiology should be recognized as life-threatening, surgically-related chronic kidney disease. On the contrary, the investigation of the prediction of mild post-radical nephrectomy renal insufficiency, which is not related to adverse consequences in the postoperative long-term period, is also promising because the prediction of mild renal insufficiency might be the basis for the substitution of radical nephrectomy for nephron-sparing surgery in technically difficult or compromised cases. The deterioration of quality of life caused by post-radical nephrectomy renal insufficiency should be investigated in conjunction with life-threatening matters.
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Affiliation(s)
- Takehiro Sejima
- Division of Urology, Department of Surgery, Tottori University Faculty of Medicine, Yonago, Japan
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Satta E, Magno C, Galì A, Inferrera A, Granese R, Aloisi C, Buemi M, Bellinghieri G, Santoro D. Sexual dysfunction in women with diabetic kidney. Int J Endocrinol 2014; 2014:346834. [PMID: 25276130 PMCID: PMC4167806 DOI: 10.1155/2014/346834] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Accepted: 08/12/2014] [Indexed: 12/04/2022] Open
Abstract
Few studies address alteration of sexual function in women with diabetes and chronic kidney disease (CKD). Quality of life surveys suggest that discussion of sexual function and other reproductive issues are of psychosocial assessment and that education on sexual function in the setting of chronic diseases such as diabetes and CKD is widely needed. Pharmacologic therapy with estrogen/progesterone and androgens along with glycemic control, correction of anemia, ensuring adequate dialysis delivery, and treatment of underlying depression are important. Changes in lifestyle such as smoking cessation, strength training, and aerobic exercises may decrease depression, enhance body image, and have positive impacts on sexuality. Many hormonal abnormalities which occur in women with diabetes and CKD who suffer from chronic anovulation and lack of progesterone secretion may be treated with oral progesterone at the end of each menstrual cycle to restore menstrual cycles. Hypoactive sexual desire disorder (HSDD) is the most common sexual problem reported by women with diabetes and CKD. Sexual function can be assessed in women, using the 9-item Female Sexual Function Index, questionnaire, or 19 items. It is important for nephrologists and physicians to incorporate assessment of sexual function into the routine evaluation protocols.
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Affiliation(s)
- Ersilia Satta
- Department of Internal Medicine, Unit of Nephrology and Dialysis, University of Messina, 98100 Messina, Italy
- Dialysis Center, “Dialnefro”, Clinica Mariarosaria, 80045 Pompei, Italy
- *Ersilia Satta:
| | - Carlo Magno
- Department of Urology, University of Messina, 98100 Messina, Italy
| | - Alessandro Galì
- Department of Urology, University of Messina, 98100 Messina, Italy
| | | | - Roberta Granese
- Department of Pediatric, Gynecological, Microbiological and Biomedical Sciences, University of Messina, 98100 Messina, Italy
| | - Carmela Aloisi
- Department of Internal Medicine, Unit of Nephrology and Dialysis, University of Messina, 98100 Messina, Italy
| | - Michele Buemi
- Department of Internal Medicine, Unit of Nephrology and Dialysis, University of Messina, 98100 Messina, Italy
| | - Guido Bellinghieri
- Department of Internal Medicine, Unit of Nephrology and Dialysis, University of Messina, 98100 Messina, Italy
| | - Domenico Santoro
- Department of Internal Medicine, Unit of Nephrology and Dialysis, University of Messina, 98100 Messina, Italy
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Scherer A, Günther OP, Balshaw RF, Hollander Z, Wilson-McManus J, Ng R, McMaster WR, McManus BM, Keown PA. Alteration of human blood cell transcriptome in uremia. BMC Med Genomics 2013; 6:23. [PMID: 23809614 PMCID: PMC3706221 DOI: 10.1186/1755-8794-6-23] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Accepted: 06/04/2013] [Indexed: 11/17/2022] Open
Abstract
Background End-stage renal failure is associated with profound changes in physiology and health, but the molecular causation of these pleomorphic effects termed “uremia” is poorly understood. The genomic changes of uremia were explored in a whole genome microarray case-control comparison of 95 subjects with end-stage renal failure (n = 75) or healthy controls (n = 20). Methods RNA was separated from blood drawn in PAXgene tubes and gene expression analyzed using Affymetrix Human Genome U133 Plus 2.0 arrays. Quality control and normalization was performed, and statistical significance determined with multiple test corrections (qFDR). Biological interpretation was aided by knowledge mining using NIH DAVID, MetaCore and PubGene Results Over 9,000 genes were differentially expressed in uremic subjects compared to normal controls (fold change: -5.3 to +6.8), and more than 65% were lower in uremia. Changes appeared to be regulated through key gene networks involving cMYC, SP1, P53, AP1, NFkB, HNF4 alpha, HIF1A, c-Jun, STAT1, STAT3 and CREB1. Gene set enrichment analysis showed that mRNA processing and transport, protein transport, chaperone functions, the unfolded protein response and genes involved in tumor genesis were prominently lower in uremia, while insulin-like growth factor activity, neuroactive receptor interaction, the complement system, lipoprotein metabolism and lipid transport were higher in uremia. Pathways involving cytoskeletal remodeling, the clathrin-coated endosomal pathway, T-cell receptor signaling and CD28 pathways, and many immune and biological mechanisms were significantly down-regulated, while the ubiquitin pathway and certain others were up-regulated. Conclusions End-stage renal failure is associated with profound changes in human gene expression which appears to be mediated through key transcription factors. Dialysis and primary kidney disease had minor effects on gene regulation, but uremia was the dominant influence in the changes observed. This data provides important insight into the changes in cellular biology and function, opportunities for biomarkers of disease progression and therapy, and potential targets for intervention in uremia.
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Bragazzi NL, Puente GD. Chronic Kidney Disease, Spirituality and Religiosity: A Systematic Overview with the List of Eligible Studies. Health Psychol Res 2013; 1:e26. [PMID: 26973911 PMCID: PMC4768585 DOI: 10.4081/hpr.2013.e26] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 02/04/2013] [Accepted: 02/04/2013] [Indexed: 11/25/2022] Open
Abstract
Chronic Kidney Disease (CKD) has a tremendous psychological burden, which sometimes is overlooked or underestimated in the daily clinical routine practice, since in the health care process physicians prefer to focus on the objective aspects of the pathology. In this contribution, we make a systematic overview of the relationship between spirituality/religiosity and CKD, an emerging theme which only recently has raised interest from the scientific community despite its importance. We investigate different variables, axis and categories (from the quality of life to customer’s satisfaction, treatment adherence and therapeutic alliance, clinical parameters, as well as overall survival, and coping strategies adopted by the patient). Moreover, we underpin the principal clinically relevant implications (like the possibility of psycho-therapeutic interventions based on the spiritual and religious attitudes of the patient) and we discuss the main gaps, methodological barriers and difficulties in the field, fostering and advocating further research and clinical studies. This last aspect, together with the quality assessment of the studies, will be further explored in the second part of the study.
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Affiliation(s)
| | - Giovanni Del Puente
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, Section of Psychiatry, University of Genoa , Italy
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Zedan H, Kamal EE, El Shazly A, Abd El Rahman MZ, Shawky A. Impact of renal failure and haemodialysis on semen parameters and reproductive hormones. HUMAN ANDROLOGY 2013; 3:16-20. [DOI: 10.1097/01.xha.0000423417.30409.55] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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18
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Hirshfeld-Cytron J, Gracia C, Woodruff TK. Nonmalignant diseases and treatments associated with primary ovarian failure: an expanded role for fertility preservation. J Womens Health (Larchmt) 2011; 20:1467-77. [PMID: 21827325 DOI: 10.1089/jwh.2010.2625] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Cancer treatments can be detrimental to fertility; recent literature has focused on the efforts of fertility preservation for this patient population. It should be recognized, however, that several nonmalignant medical conditions and therapeutic interventions could be similarly hazardous to fertility. Some of these nonmalignant diseases and their treatments that can adversely impact the reproductive axis are gastrointestinal diseases, rheumatologic disorders, nonmalignant hematologic conditions, neurologic disorders, renal disorders, gynecologic conditions, and metabolic diseases. Their negative effects on reproductive function are only now being appreciated and include impaired ovarian function, endocrine function, or sexual function and inability to carry a pregnancy to term. Complications and comorbidities associated with certain diseases may limit the success of established fertility preservation options. Recent advances in fertility preservation techniques may provide these patients with new options for childbearing. Here, we review several fertility-threatening conditions and treatments, describe current established and experimental fertility preservation options, and present three initiatives that may help minimize the adverse reproductive effects of these medical conditions and treatments by raising awareness of the issues and options: (1) increase awareness among practitioners about the reproductive consequences of specific diseases and treatments, (2) facilitate referral of patients to fertility-sparing or restorative programs, and (3) provide patient education about the risk of infertility at the time of diagnosis before initiation of treatment.
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Affiliation(s)
- Jennifer Hirshfeld-Cytron
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
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19
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20
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Workeneh BT, Mitch WE. Review of muscle wasting associated with chronic kidney disease. Am J Clin Nutr 2010; 91:1128S-1132S. [PMID: 20181807 DOI: 10.3945/ajcn.2010.28608b] [Citation(s) in RCA: 185] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Muscle wasting increases the morbidity and mortality associated with chronic kidney disease (CKD) and has been attributed to malnutrition. In most patients, this is an incorrect diagnosis because simply feeding more protein aggravates uremia. Instead, there are complex mechanisms that stimulate loss of skeletal muscle, involving activation of mediators that stimulate the ATP-dependent ubiquitin-proteasome system (UPS). Identified mediators of muscle protein breakdown include inflammation, metabolic acidosis, angiotensin II, and neural and hormonal factors that cause defects in insulin/insulin-like growth factor I (IFG-I) intracellular signaling processes. Abnormalities in insulin/IGF-I signaling activate muscle protein degradation in the UPS and caspase-3, a protease that disrupts the complex structure of muscle proteins to provide substrates for the UPS. During the cleavage of muscle proteins, caspase-3 leaves behind a characteristic 14-kD actin fragment in the insoluble fraction of muscle, and characterization of this fragment identifies the presence of muscle catabolism. Thus, it could become a marker of excessive muscle wasting, providing a method for early detection of muscle wasting. Another consequence of activation of caspase-3 in muscle is stimulation of the activity of the proteasome, which increases the degradation of muscle proteins. Treatment strategies for blocking muscle wasting include correction of metabolic acidosis, which can suppress muscle protein losses in patients with CKD who are or are not being treated by dialysis. Correcting acidosis also improves bone metabolism in CKD and hence should be a goal of therapy. Exercise training is a potentially beneficial approach, but more information is needed to optimize exercise regimens. Replacing testosterone deficits can improve muscle mass in men, but dosing and side effects in women have not been adequately tested. Although insulin resistance occurs early in the course of CKD, there are no effective means of correcting it. Consequently, new therapies that can safely suppress muscle wasting are needed.
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Affiliation(s)
- Biruh T Workeneh
- Division of Nephrology, Baylor College of Medicine, Houston, TX, USA
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21
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Usdin TB, Paciga M, Riordan T, Kuo J, Parmelee A, Petukova G, Camerini-Otero RD, Mezey E. Tuberoinfundibular Peptide of 39 residues is required for germ cell development. Endocrinology 2008; 149:4292-300. [PMID: 18483145 PMCID: PMC2553379 DOI: 10.1210/en.2008-0419] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Tuberoinfundibular peptide of 39 residues (TIP39) was identified as a PTH 2 receptor ligand. We report that mice with deletion of Tifp39, the gene encoding TIP39, are sterile. Testes contained Leydig and Sertoli cells and spermatogonia but no spermatids. Labeling chromosome spreads with antibodies to proteins involved in recombination showed that spermatogonia do not complete prophase of meiosis I. Chromosomes were observed at different stages of recombination in single nuclei, a defect not previously described with mutations in genes known to be specifically involved in DNA replication and recombination. TIP39 was previously shown to be expressed in neurons projecting to the hypothalamus and within the testes. LH and FSH were slightly elevated in Tifp39(-/-) mice, suggesting intact hypothalamic function. We found using in situ hybridization that the genes encoding TIP39 and the PTH 2 receptor are expressed in a stage-specific manner within seminiferous tubules. Using immunohistochemistry and quantitative RT-PCR, TIP39 expression is greatest in mature testes, and appears most abundant in postmeiotic spermatids, but TIP39 protein and mRNA can be detected before any cells have completed meiosis. We used mice that express Cre recombinase under control of a spermatid-specific promoter to express selectively a cDNA encoding TIP39 in the testes of Tifp39(-/-) mice. Spermatid production and fertility were rescued, demonstrating that the defect in Tifp39(-/-) mice was due to the loss of TIP39. These results show that TIP39 is essential for germ cell development and suggest that it may act as an autocrine or paracrine agent within the gonads.
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Affiliation(s)
- Ted B Usdin
- National Institute of Mental Health/National Institutes of Health, Bethesda, Maryland 20892, USA.
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22
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Abstract
Systemic illnesses are associated with alterations in the hypothalamic-pituitary-peripheral hormone axes, which represent part of the adaptive response to stressful events and may be influenced by type and severity of illness and/or pharmacological therapy. The pituitary gland responds to an acute stressful event with two secretory patterns: adrenocorticotropin (ACTH), prolactin (PRL) and growth hormone (GH) levels increase, while luteinizing hormone (LH), follicle-stimulating hormone (FSH) and thyrotropin (TSH) levels may either decrease or remain unchanged, associated with a decreased activity of their target organ. In protracted critical illness, there is a uniformly reduced pulsatile secretion of ACTH, TSH, LH, PRL and GH, causing a reduction in serum levels of the respective target-hormones. These adaptations are initially protective; however, if inadequate or excessive they may be dangerous and may contribute to the high morbidity and mortality risk of these patients. There is no consensus regarding the type of approach, as well as the criteria to use to define pituitary axis function in critically ill patients. We here provide a critical approach to pituitary axis evaluation during systemic illness.
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Affiliation(s)
- Marta Bondanelli
- Department of Biomedical Sciences and Advanced Therapies, University of Ferrara, Ferrara, Italy
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23
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Watnick S. Pregnancy and contraceptive counseling of women with chronic kidney disease and kidney transplants. Adv Chronic Kidney Dis 2007; 14:126-31. [PMID: 17395115 DOI: 10.1053/j.ackd.2007.01.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Women with kidney disease of childbearing age should expect proactive counseling regarding pregnancy and contraception. Discussions should include the impact of pregnancy on their kidney disease and the impact of kidney disease on maternal and fetal outcomes. However, nephrologists rarely discuss sexual dysfunction, infertility, menstrual irregularities, and contraception with their premenopausal women patients. This review will consider pregnancy-related issues to discuss when counseling women with all stages of chronic kidney disease. Issues related to contraception in women on dialysis, women with functioning kidney transplants, and those with chronic kidney disease will also be reviewed.
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Affiliation(s)
- Suzanne Watnick
- VA Dialysis Unit, Portland VA Medical Center, Oregon Health and Science University, Portland, OR 97239, USA.
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24
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Abstract
Endocrine abnormalities are common in patients with chronic kidney disease (CKD) and lead to sexual dysfunction, anemia, hyperparathyroidism, and altered mineral metabolism. Common clinical problems include disturbances in menstruation in women, erectile dysfunction in men, and decreased libido and infertility in both sexes. Organic factors tend to be prominent and are related to uremia and other comorbid illnesses. Psychological factors and depression may exacerbate the primary problem. Alterations in the hypothalamic-pituitary axis are seen early in CKD and tend to worsen after patients start dialysis. Hypogonadism plays a dominant role in male sexual function, whereas changes in hypothalamic-pituitary function predominate in female sexual dysfunction. In patients on dialysis, treatment strategies include optimizing dose of dialysis, correction of anemia with erythropoietin, and correction of hyperparathyroidism. Successful kidney transplantation may restore normal sexual function, especially in younger patients.
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25
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McKay D, Adams P, Bumgardner G, Davis C, Fine R, Krams S, Martinez O, Murphy B, Pavlakis M, Tolkoff-Rubin N, Sherman M, Josephson M. Reproduction and pregnancy in transplant recipients: current practices. Prog Transplant 2006. [DOI: 10.7182/prtr.16.2.j3324t64t6517u76] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Affiliation(s)
- Dianne B McKay
- Department of Immunology, Scripps Research Institute, La Jolla, Calif 92037, USA.
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Poulin S, Brossard JH, Noël R, Isenring P. Hypercalcaemia in a patient with membraneous nephropathy. Nephrol Dial Transplant 2006; 21:1434-8. [PMID: 16495289 DOI: 10.1093/ndt/gfl046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Sonya Poulin
- Nephrology Group, Hôpital L'Hôtel-Dieu de Québec Institution, Department of Medicine, Laval University, Québec (QC), G1R 2J6, Canada
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28
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Brandenburg VM, Ketteler M, Heussen N, Politt D, Frank RD, Westenfeld R, Ittel TH, Floege J. Lumbar bone mineral density in very long-term renal transplant recipients: impact of circulating sex hormones. Osteoporos Int 2005; 16:1611-20. [PMID: 15999293 DOI: 10.1007/s00198-005-1884-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2004] [Accepted: 02/14/2005] [Indexed: 10/25/2022]
Abstract
The influence of circulating sex hormones and gender on the bone mineral density (BMD) in long-term renal transplant recipients needs further investigation. We performed a retrospective analysis of lumbar BMD between 6 years and 20 years after renal transplantation. In 67 patients (47+/-12 years, 38 male) with a minimum interval of 72 months after transplantation, lumbar BMD measurements (dual energy X-ray absorptiometry) were performed (=complete cohort). Thirty-one patients (=longitudinal cohort) underwent at least three serial BMD measurements (mean follow-up 39+/-18 months, start at 86+/-22 months). All patients received prednisolone. In the complete cohort, BMD was significantly reduced in comparison to young healthy (mean T-score -1.33+/-1.40) and age-matched controls (mean Z-score -0.91+/-1.45) at 88+/-31 months (p<0.05). Osteopenia or osteoporosis were present in two-thirds of patients. In the longitudinal cohort, a mean annual lumbar BMD loss of -0.6+/-1.9% was detectable equivalent to a -0.03+/-0.15 reduction of Z-scores per year (regression analysis). Impact of hormonal status: In the complete cohort, postmenopausal status was associated with significantly lower BMD levels compared to men (p=0.0441). Women and men within the lowest tertile of sex hormone levels (LH, FSH, DHEAS, testosterone, progesterone, estradiol) did not exhibit significant differences in terms of lumbar BMD compared to those in the highest tertile. The mean annual bone loss was statistically indistinguishable between men and women. There was no significant correlation of sex hormone levels and BMD in men and premenopausal women. In postmenopausal women, however, low estradiol and high LH levels correlated with the extent of annual BMD loss (p<0.05). Our data confirm significantly reduced lumbar T-scores in the very late period after renal transplantation. The lumbar BMD decreased by -0.6+/-1.9% per year. In postmenopausal long-term renal transplant recipients, low estradiol levels were associated with accelerated bone loss.
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Affiliation(s)
- Vincent M Brandenburg
- Department of Nephrology, University Hospital, Rheinisch-Westfälische Technische Hochschule Aachen, 52057, Aachen, Germany.
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Larsson T, Nisbeth U, Ljunggren O, Jüppner H, Jonsson KB. Circulating concentration of FGF-23 increases as renal function declines in patients with chronic kidney disease, but does not change in response to variation in phosphate intake in healthy volunteers. Kidney Int 2004; 64:2272-9. [PMID: 14633152 DOI: 10.1046/j.1523-1755.2003.00328.x] [Citation(s) in RCA: 491] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND Hyperphosphatemia is a risk factor for the development of several different complications of chronic kidney disease (CKD), including secondary hyperparathyroidism and cardiovascular complications, due to the formation of calcium-phosphate deposits. Fibroblast growth factor-23 (FGF-23) is a recently discovered protein that is mutated in autosomal-dominant hypophosphatemic rickets, an inherited phosphate wasting disorder, and it may represent a novel hormonal regulator of phosphate homeostasis. We therefore hypothesized that FGF-23 levels may be altered in hyperphosphatemia associated with renal failure and that its concentration changes in response to different levels of phosphate intake. METHODS Using a two-site enzyme-linked immunosorbent assay (ELISA) detecting the C-terminal portion of FGF-23, serum concentration was measured in 20 patients with different stages of renal failure (creatinine range 155 to 724 micromol/L), in 33 patients with end-stage renal disease (ESRD) on dialysis treatment, and in 30 patients with functioning renal grafts. Furthermore, six healthy males were given oral phosphate binders in combination with low dietary phosphate intake for 2 days followed by 3 days of repletion with inorganic phosphate. FGF-23 levels were determined at multiple time points. RESULTS FGF-23 serum levels were significantly elevated in CKD with a strong correlation between serum creatinine and FGF-23 concentration. Independent correlations were also seen between FGF-23 and phosphate, calcium, parathyroid hormone (PTH), and 1,25(OH)2D3. No changes in serum FGF-23 levels were observed in volunteers following ingestion of oral phosphate binders/low dietary phosphate intake, which led to a decline in phosphate excretion or during the subsequent repletion with inorganic phosphate through oral phosphate and a normal diet. CONCLUSION Circulating FGF-23 was significantly elevated in patients with CKD and its concentration correlated with renal creatinine clearance. In healthy volunteers, FGF-23 levels did not change after phosphate deprivation or phosphate loading.
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Affiliation(s)
- Tobias Larsson
- Department of Medical Sciences, University Hospital, Uppsala, Sweden
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Lomasney LM, Demos TC, Francois C, Pangan A. Radiologic case study. Dermatomyositis with dystrophic soft-tissue calcifications. Orthopedics 2004; 27:191, 241-4. [PMID: 14992383 DOI: 10.3928/0147-7447-20040201-08] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Laurie M Lomasney
- Department of Radiology, Loyola University Medical Center, Maywood, Ill 60153, USA
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Brophy DF, Ripley EBD, Holdford DA. Pharmacoeconomic considerations in the health system management of anaemia in patients with chronic kidney disease and end stage renal disease. Expert Opin Pharmacother 2003; 4:1461-9. [PMID: 12943475 DOI: 10.1517/14656566.4.9.1461] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Anaemia is prevalent in patients with chronic kidney disease and end stage renal disease. If left untreated, it greatly affects patient survival, quality of life and functional status. Epoetin and darbepoetin are two biotechnology drugs that effectively stimulate the production of red blood cells. These drugs have been shown to significantly increase haemoglobin concentrations and improve quality of life. So far, there have been no head-to-head pharmacoeconomic studies that have compared epoetin to darbepoetin. Health system decision makers need to evaluate important considerations when comparing these agents. These considerations include drug acquisition costs, the patient population being treated, the location of drug administration (in-patient versus ambulatory) and federal government reimbursement. This review details these important pharmacoeconomic considerations.
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Affiliation(s)
- Donald F Brophy
- Department of Pharmacy, Virginia Commonwealth University/Medical College of Virginia School of Pharmacy, Richmond, Virginia 23298 0533, USA.
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