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Objective To analyze the impairment of renal allograft function in renal transplant recipients caused by BK virus infection after renal transplantation. Methods Clinical data of 210 recipients who underwent allogenic renal transplantation and received BK virus monitoring regularly were analyzed retrospectively. The incidence of BK viruria, viremia and BK virus nephropathy (BKVN) after renal transplantation was summarized. The effect of BK virus infection on renal allograft function and prognosis of renal allograft function after the removement of BK virus were analyzed. Results Among the 210 recipients, there were 46 cases with pure viruria, 46 cases with viremia complicated with viruria and 7 cases with BKVN confirmed by pathological biopsy. The level of serum creatinine (Scr) in the recipients with viremia after renal transplantation was linearly related to BK viral load in urine and blood (r=0.594, 0.672, both P<0.01). The level of Scr increased significantly when BK viral load in blood of the recipients with viremia was found positive for the first time, and increased continuously after viremia sustained. And the level of Scr decreased slightly when blood viral load turned to negative after treatment, but still significantly higher than before virus infection. All the above differences were statistically significant (all P<0.05). Compared with the basic level, there was no significant difference in the level of Scr of recipients with pure viruria during positive viruria (all P>0.05). Conclusions It will impair the renal allograft function when BK viremia occurs after renal transplantation, and it is necessary to monitor viral infection regularly. Once the blood BK virus is found positive, it shall be implemented immediately to reduce the intensity of immunosuppression as the preferred clinical intervention.
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Objective To explore the relationship of post-transplant major histocompatibility complex class I chain-related gene A(MICA)antibody status and renal allograft function in clinical stable phase.Methods Fifty-seven patients accepted renal allografts followed up for at least 6 months were detected with the levels and specialties of MICA antibodies by Flow PRATM beads.Simultaneously,their serum ereatinine levels were tested as well.The impact of MICA antibody status on renal allograft function was assessed.Results Among the 57 patients,38 cases showed no HLA and MICA antibody.11 cases had HLA antibodies but not MICA antibody,8 cases had MICA antibodies and 3 cases had both MICA and HLA antibodies.There were 5 patients with MICA019 antibodies.3 patients with MICA027 antibodies,2 patients with MICA018 antibodies,while 1 patient with MICA004 and MICA017 antibodies,respectively.There were 9 patients with antibody positive score higher than 6,accounting 75%(9/12).Except age,there was no significant difference between patients with positive and negative MICA antibodies in the aspects of blood transfusion history,CDC,and cold ischemia time(P＞0.05).The average ages were(32.5±7.9)years for MICA antibodypositive patients and were(43.0±1 0.4)years for MICA antibody-negative patients(P=0.008).MICA antibody-positive patients without HLA antibody had higher serum creatinine level[(117.20±12.30)μmol/L]than MICA and HLA antibody-negative patients[(89.40±28.95)μmol/L,P＜0.05].Conclusions The measurement of MICA antibodies has prognostic value in the assessment of patients without HLA antibodies after renal transplantation.MICA antibody positive has clear association with chronic renal allograft function decline.
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PURPOSE: Laparoscopic living donor nephrectomy has recently been emerged as a very attractive measure to the standard open surgical procedure for kidney transplantation (KTx) because of many advantages. But it also has some disadvantages such as technical difficulty, impaired early graft function and expensiveness. To overcome this shortcomings, we developed a new surgical method of retroperitoneoscopy assisted live donor nephrectomy. The method has been reported as an attractive surgical methods with many advantages to donor. But, recipient`s outcome is also equally important in living donor kidney transplantation. METHODS: We retrospectively studied recipient`s outcome between patients who received living donor kidneys from conventional open nephrectomies (Group I, n=247) and retroperitoneoscopy assisted nephrectomies (Group II, n=82) at our institution from March 1, 1997 and July 30, 2000. We compared postoperative complication, patient and graft survival and graft function between two groups for 12 months retrospectively. RESULTS: Demographic data such as age, sex, kidney weight/body weight ratio; ABO compatibility; degree of HLA matching and method of immunosuppression were not different between two groups (p>0.05). Complications, such as delayed graft function, acute rejection, ureter complication, graft failure, patients motality were not different. For the evaluation of graft function, we measured serum creatinine level for 12 months after trasplantation. There also was no difference of graft function between two groups. CONCLUSION: Recipient's outcome in patient received kidney by retroperitoneoscopy assisted live donor nephrectomy was similar to those of patient received kidney by conventional operation.