Başkent Üniversitesi Yayınları
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Item Acute Tubular Necrosis After Renal Allograft Segmental Infarction: The Nephrotoxicity of Necrotic Material(Başkent Üniversitesi, 2008-12) Ardalan, Mohammad Reza; Shoja, Mohammadali Mohajel; Ghabili, Kamyar; Nasri, HamidObjectives: Renal allograft dysfunction can be caused by renal vessel thrombosis, acute tubular necrosis, hyperacute or acute rejection, nephrotoxicity induced by cyclosporine or tacrolimus, thrombotic microangiopathy, or urinary tract obstruction. Materials and Methods: We describe a renal transplant recipient in whom oliguria developed during the first week after transplant, although his early renal allograft function was good. Results: A Doppler ultrasonographic study revealed a lack of perfusion in the lower pole of the allograft. A perfusion defect was noted in the lower pole that was supplied by a polar artery, which had been damaged during engraftment. Light microscopy disclosed tubular cell necrosis without evidence of vascular or humoral rejection. Conclusions: We suggest that toxic molecules such as tumor necrosis factor-alpha released from a segmental infarcted area can induce tubular cell damage and necrosis leading to renal allograft dysfunction.Item Association Between Increased Body Mass Index, Calcineurin Inhibitor Use, and Renal Graft Survival(Başkent Üniversitesi, 2008-09) Ghahramani, Nasrollah; Hollenbeak, Christopher; Reeves, W. BrianObjectives: Using data from the US Renal Data System, we examined the relation between body mass index and graft survival as mediated through calcineurin inhibitor use. Materials and Methods: Adult patients who received a first kidney-only transplant, with at least 6 months’ survival were classified into 5 categories (underweight, normal, overweight, obese, and extremely obese) according to body mass index. Associations between calcineurin inhibitor use, body mass index categories, and outcomes were investigated. Results: Underweight and normal-weight recipients lived longer than the other 3 categories, regardless of calcineurin inhibitor use. Graft survival was significantly inferior among obese and extremely obese patients. Average graft survival was significantly higher for recipients with a normal body mass index than it was for overweight, obese, and extremely obese recipients. Risk ratio for graft failure was constant for the calcineurin inhibitor versus the noncalcineurin inhibitor group across all body mass index categories. Mean body mass index for the group with rejection episodes was similar to the group with no rejections; there was no correlation between body mass index and rejection risk. Conclusions: Increased body mass index is associated with inferior patient and graft survival, independent of calcineurin inhibitor use. Because we found no correlation between body mass index and risk of rejection, we assume that, at least after the initial 6 months, the adverse effect of obesity on graft outcome is partially mediated through nonimmunologic mechanisms. When analyzing graft and patient survival rates, we recommend that body mass index be considered a risk factor.Item Clinicoepidemiologic Study of Posttransplant Diabetes After Living-Donor Renal Transplant(Başkent Üniversitesi, 2008-03) Elmagd, Mogahid M Abu; Wahab, Ahmad M abd El; AMetwally, Abdel Hameed; Bakr, Mohammed A.Objectives: We sought to evaluate posttransplant diabetes mellitus with regard to its incidence, risk factors for occurrence, complications, impact on graft function, and impact on patient and graft survival rates. Materials and Methods: A total of 1580 patients received living-donor renal allografts at Mansoura University, Egypt, between March 1976 and November 2004. Of these, 286 recipients developed diabetes after transplant (diabetic group). These patients were matched with 316 kidney transplant recipients who did not develop diabetes after transplant (control group). A complete clinical history was obtained and a clinical examination was done. Laboratory analyses including urine analysis, complete blood count, total serum cholesterol, fasting and 2-hour postprandial plasma glucose, Hb A1c, serum creatinine, and creatinine clearance were obtained in all patients. In each patient, presence of hepatitis B and C was determined with polymerase chain reaction, and a graft biopsy was obtained to diagnose renal allograft rejection. Results: The onset of diabetes mellitus among our recipients occurred primarily during the first 6 months after transplant (in 52.4% of the patients). Significant correlations were found between posttransplant diabetes mellitus and the recipients’ age (P = .0001), obesity (P = .001), positive family history of diabetes mellitus (P = .001), hepatitis C virus infection (P = .039), cumulative dose of steroids in the first 3 months (P = .047), and calcineurin inhibitor-based immunosuppressive therapy (P = .001). Moreover, posttransplant diabetes mellitus significantly affected rates of coronary heart disease (P = .001), hypertension (P = .02), and hypercholesterolemia (P = .001). Graft survival was similar in both groups until 15-year follow-up, at which time graft survival began to decrease in patients with diabetes mellitus compared with those without diabetes mellitus (43.5% vs 53.6%, P = .013). Similarly, patient survival was similar until 8-year follow-up, at which time survival rates began to decline in patients with diabetes as compared with patients without diabetes (79.9% vs 86.1%, P = .001); this trend continued to the 15-year follow-up (60.6% vs 77.8%, P = .001). Conclusions: Posttransplant diabetes mellitus is a major problem that endangers patient and graft survival. In our population, the incidence of posttransplant diabetes mellitus was 18.2%. Further studies are recommended to screen for patients with impaired fasting glucose and impaired glucose tolerance for prediction, early detection, and better management of posttransplant diabetes mellitus.Item Renal Allograft Abscesses Following Transplant: Case Report and Literature Review(Başkent Üniversitesi, 2007-12) Shoja, Mohammadali M.; Varshochi, Mojtaba; Tubbs, R. Shane; Etemadi, Jalal; Ardalan, Mohamad R.Intrarenal and perinephric abscess formations are infrequent infectious complications in kidney allograft recipients. A 37-year-old man who was a victim of mustard gas chemical weapons from the Iran-Iraq war received a live-donor kidney transplant for end-stage renal disease. The posttransplant course was complicated by clinical rejection, which subsided after a 2-week infusion of antithymocyte globulin. One month subsequent to this, the patient presented with renal allograft dysfunction and multiple intrarenal abscesses. Culture from the purulent aspirate of a percutaneously drained renal abscess revealed multidrug-resistant Pseudomonas aeruginosa. A concomitant acute cytomegalovirus infection was detected based on positive serologic tests. Treatment with intravenous meropenem (3 g/day for 3 weeks) and oral ciprofloxacin was begun, which resulted in the complete resolution of the intrarenal abscesses. To our knowledge, this report represents the first description of pseudomonal renal abscesses in a renal transplant recipient. A review of the relevant literature is presented.Item Life in Death: an Overview of Solid Organ Transplant in Shiraz, Iran(Başkent Üniversitesi, 2007-12) Mehdizadeh, Alireza; Fazelzadeh, AfsoonAdvances in organ preservation, immunosuppression, and surgical procedures have resulted in improved outcomes and survival rates. However, regarding organ transplant in different communities, these advances raise major ethical, policy, and religious issues. Transplant progress in Iran, in relation to the rest of the world, has been slow at times and quick during others. Between 1988 and 1993, there was a rapid surge in experiments with tissue transplant in Iran, and the Shiraz Organ Transplantation Center, established in 1988, rose to become a pioneer of the most significant improvements, a leading center for organ transplant, and the only center for liver transplant in Iran. In this article, we review milestones in the development of a successful organ transplant program and implementation of legislation in Iran. The Shiraz model of transplant is a new program that attempts to overcome the problems of organ shortage. We provide a description of the Iranian model of transplant and its restrictions and examine the most promising future trends in this exciting field.Item Steroid Avoidance in Renal Transplant Patients Maintained on a Cyclosporine-based Protocol(2007-12) Ko, Tina Y; Julie A Haddy,; Sureshkumar, Kalathil K.; Breckenridge, Molly; Patel, Satish; Marcus, Richard J.; Sandroni, Stephen E.; McGill, Rita L.; Carpenter, Barbara J.; Nghiem, Dai D.Objective: The aim of this study was to analyze the effect of steroid avoidance, as compared with our pre-existing protocol that contained steroids, on renal allograft and patient survival. Secondary outcomes included body weight, diabetes, hyperlipidemia, and infection. Materials and Methods: This retrospective chart review of the results of steroid avoidance was performed in 169 patients who had undergone renal transplant between January 2000 and March 2002 and had received an immunosuppression regimen of cyclosporine, mycophenolate mofetil, and prednisone; and 148 patients who had undergone transplant between November 2002 and November 2004 who had received induction immunosuppression with a steroid taper by postoperative day 4 and were maintained on cyclosporine and mycophenolate mofetil. Results: One-year allograft survival rates, rejection-free graft survival rates, and patient survival rates were 88%, 76%, and 97%, respectively, in the steroid-maintenance group compared with 90%, 74%, and 96%, respectively, in the steroid-avoidance group (P = NS). No differences were detected in multiple secondary variables related to the metabolic effects of steroid therapy. Conclusions: These data suggest that steroid avoidance can be performed safely and effectively in patients on a cyclosporine-based protocol of immunosuppression. Longer follow-ups are suggested to determine the effects of limited steroid exposure on the metabolic profiles of patients.Item An Outbreak of Chickenpox in Adult Renal Transplant Recipients(Başkent Üniversitesi, 2007-06) Shahbazian, Heshmatollah; Ehsanpour, AliInfection with the varicella-zoster virus, the etiologic agent of chickenpox and herpes zoster, is more serious in immunosuppressed renal transplant recipients than it is in the general population. Chickenpox is a rare infection in adult renal transplant recipients; however, it is significant owing to the severity of its clinical features and its associated high mortality rate. To date, there are no reported outbreaks of primary varicella-zoster virus infection in adult renal transplant recipients. Here, we report 3 patients with chickenpox who presented to our center between May 2006 and June 2006.Item Cytomegalovirus Disease in Renal Transplant Recipients: A Single-Center Experience(Başkent Üniversitesi, 2007-06) Basri, Nawal; Abdullah, K. A. K.; Shaheen, F. A. M.Objectives: Cytomegalovirus is the most common viral infection following kidney transplant, with overall frequencies of 50% to 80% for the infection and 20% to 60% for cytomegalovirus disease. Materials and Methods: We retrospectively analyzed the medical records of 689 kidney transplant recipients at Jeddah Kidney Center in the Kingdom of Saudi Arabia between January 2000 and December 2005 for cytomegalovirus infection and disease. We examined the source of the donated kidneys (deceased versus living donor), the cytomegalovirus serostatus of the donor and recipient, the immunosuppressive protocol, the presence of cytomegalovirus prophylaxis, the clinical presentation of acute cytomegalovirus disease, the patient’s response to treatment, and the effect of cytomegalovirus disease on graft and patient survival. Results: Of 689 kidney transplant recipients, 25 (3.6%) had acute cytomegalovirus disease. All 25 patients had cytomegalovirus IgG positive/IgM negative test results prior to transplant. We noticed 2 distinct groups of patients: the first group included 9 patients with cytomegalovirus syndrome, 6 of whom received cytomegalovirus prophylaxis with ganciclovir. All patients in this group had low cytomegalovirus viral loads on polymerase chain reaction, mild disease, and responded to treatment with complete recovery and no adverse effects with respect to themselves or their grafts. The second group included 16 patients with invasive cytomegalovirus disease, 3 of whom received cytomegalovirus prophylaxis. All patients in this group had very high cytomegalovirus viral loads on polymerase chain reaction. Thirteen patients in this group (81%) responded to treatment with full recovery, and normal graft function was maintained in 10 (62%). Of the original 16 patients in this group, 3 (18.8%) died from cytomegalovirus disease and its complications. Conclusions: We report a low incidence (3.6%) of cytomegalovirus disease at our center. Cytomegalovirus prophylaxis was associated with a milder form of the disease. At our center, treatment of invasive cytomegalovirus disease produced a patient survival rate of 81% and a graft survival rate of 62%.Item Fungal Infections in Solid Organ Recipients(Başkent Üniversitesi, 2005-12) Badiee, Parisa; Kordbacheh, Parivash; Alborzi, Abdolvahab; Zeini, Farideh; Mirhendy, Hossein; Mahmoody, MahmoodBackground: Fungal infections are a major cause of morbidity and mortality after organ transplantation. The incidence of these infections has increased considerably over the last decade. Objectives: The aim of this study was to evaluate the incidence of fungal infections, to identify the most common fungal pathogens, and to determine the associated risk factors in solid organ recipients. Methods: One hundred twenty renal and 50 liver recipients were transplanted at the organ transplant unit of Nemazi Hospital in Shiraz, Iran, from September 2004 to August 2005 and were followed for fungal infections for at least 6 months. On admission to the hospital, all patients were evaluated for fungal colonization by mouth, vagina, urine, and rectal swabs cultured in Sabouraud Dextrose Agar. Samples of sputum, bronchoalveolar lavage, urine, cerebrospinal fluid (CSF), pleural tap, and tissue biopsy were evaluated by direct microscopic examination and were cultured for any clinical signs of fungal infections. Results: Fifty-four kidney recipients (45%) had Candida colonization in different sites of their bodies. Fungal infections presented in 13 of 120 recipients (10.8%). Five recipients had invasive fungal infections (3 had fungal pneumonitis and 2 had severe esophagitis), and 8 patients had cutaneous and mucocutaneous infections. All of the recipients with invasive fungal infections were colonized with Candida, and 2 of them died. Forty-two (84%) liver recipients had Candida colonization in different sites of their bodies. Fungal infections presented in 6 liver recipients. In 4 patients, invasive fungal infections occurred (2 fungal pneumonitis, 1 meningitis, and 1 severe esophagitis), 2 patients showed mucocutaneous infections. Three recipients with invasive fungal infections had Candida colonization. The mean time to diagnosis was 70 days after transplantation. The most common etiologic agent for fungal infections was Candida albicans. Conclusions: Renal and liver recipients with Candida colonization are at high risk for fungal infections and therefore, control of fungal colonization in liver and renal transplant candidates would reduce the risk of invasive fungal infections after transplantation.Item Middle East Society for Organ Transplantation (MESOT) Transplant Registry(Başkent Üniversitesi, 2004-12) Haberal, Mehmet A.; Shaheen, Faissal A. M.; Stephan, Antoine; Ghods, Ahad J.; Al-Rohani, Muhamed; Mousawi, Mustafa Al; Mohsin, Nabil; Ben, Taieb; Bakr, Adel; Rizvi, Adibul HasanDuring the seventies, sporadic renal transplants were performed in few MESOT-region countries, mainly Turkey, Iran, Egypt, and Lebanon. Since the introduction of cyclosporine in the early eighties, transplantation has become the preferred therapeutic modality for end-stage renal failure. In 1986, the Islamic theologians (Al Aloma) issued what became known as the Amman declaration, in which they accepted brain death and retrieval and transplantation of organs from living and cadaveric donors. Based on this and similar declarations, all Middle Eastern countries except Egypt passed laws that allow cadaveric transplantation and regulate live donations. Iran, Turkey, Saudi Arabia, Kuwait, Tunisia, Jordan, and Lebanon all have current active cadaveric programs and perform liver, heart, pancreas, and lung transplants. More than 5088 renal transplants/year are performed in the region with Iran leading with 1600. The cumulative number of renal transplant patients is now nearly 60,000. With a 2003 population of 600,682,175, the rate/million for renal transplantation in the MESOT region is a mere 9/million. Rates of renal transplantation range from 31/million in some countries to 0 in others. The major obstacle in establishing an accurate number of transplants is “tourist transplantation,” in which the same transplanted patients are registered in different countries. Although cadaveric programs have been active for more than 10 years, live-related and nonrelated transplants account for nearly 85% of the total transplants. The data presented were collected from MESOT representatives in the region and from publications. For proper compilation of the registry, a format is being proposed that will be presented at the Congress for review and adaptation. Even with the limited resources in the region, immunosuppressive drugs for induction and maintenance therapy are available and are used. Costs for transplantation and immunosuppressive therapy are either totally or heavily supported by governmental agencies.