Adult living-donor liver transplantation with ABO-incompatible grafts

BACKGROUND: Liver transplantation using ABO-incompatible grafts is rarely performed because the reported outcome is poorer than with compatible grafts. We report our positive experience with adult-to-adult living-donor liver transplant (LDLT) using ABO-incompatible grafts. METHODS: The immunosuppressive protocol consisted of plasmapheresis/intravenous immunoglobulin infusion before LDLT followed by thymoglobulin induction and splenectomy, maintenance with tacrolimus/cyclosporine (FK/CSA), mycophenolate mofetil, and a rapid steroid taper. Plasmapheresis was planned for up to 3 months after LDLT aiming at maintaining the anti-ABO titers level below 1:16. Liver biopsies were routinely stained for humoral rejection with complement 4d (C4d) and for biliary damage with cytokeratin 7. RESULTS: Between January 2003 and September 2004, five patients, mean age 59 years, received an ABO-incompatible LDLT. Patient and graft survival was 80% at mean follow-up of 43 months (range, 34-54) for the four surviving patients. One patient died 4 months after LDLT. Humoral rejection occurred in one patient whereas acute cellular rejection was diagnosed in four patients. CONCLUSIONS: ABO-incompatible LDLT can be performed with patient and graft survival similar to compatible LDLT. Minimization of immunosuppression is possible, and chronic biliary damage is not the norm. Better tools than complement 4d staining must be researched to diagnose the features of immunologic damage to the graft. If these results will be confirmed in a greater number of patients, ABO-incompatible LDLT may be proposed when ABO-compatible donors are not available or when the ABO-incompatible donor is the better candidate.     

Intraportal infusion therapy as a novel approach to adult ABO-incompatible liver transplantation

BACKGROUND: ABO-incompatible liver transplantation is associated with an extremely complicated postoperative course, especially when the recipients are adults. METHODS: Two adult patients underwent living-donor liver transplantation from ABO-incompatible donors. The antirejection therapy included multiple perioperative plasmapheresis, splenectomy, systemic triple immunosuppressive regimen with tacrolimus, methylprednisolone, and cyclophophamide, or azathioprine. In addition to these conventional approaches, we performed intraportal infusion therapy after transplantation with methylprednisolone, prostaglandin E1, and gabexate mesilate. RESULTS: With our protocol, antidonor blood group antibody titers in both cases remained low without any evidence of rejection or vascular complications throughout the postoperative course. Biliary complications were transient and resolved completely. The patients have now survived 30 and 12 months posttransplantation and have regained normal life activity with good liver function. CONCLUSIONS: Our experience has shown the feasibility of controlling rejection and other complications in adult ABO-incompatible liver transplantation under intraportal infusion therapy.     

Management of an ABO-Incompatible Lung Transplant

A 24-year-old woman with cystic fibrosis underwent bilateral sequential lung transplantation and unintentionally received an ABO incompatible graft (blood type A(1) graft into a type O recipient). The recipient had a high titer of IgG anti-A antibody (256 by the indirect antiglobulin test). Emergency treatment included antibody removal by plasmapheresis and additional immunosuppression with mycophenolate, rabbit antithymocyte globulin and polyspecific intravenous immunoglobulin. Subsequently, immunoadsorption and the anti-CD20 antibody rituximab were used to remove anti-A antibody and inhibit its resynthesis. Early graft function was good; one episode of rejection at Day 46 responded promptly to treatment with methylprednisolone. Subsequently, graft function continued to improve and anti-A antibody titers remained low. No infectious or other complications were encountered. The treatment regimen that we adopted may prove useful in other cases of unplanned ABO-incompatible organ transplants. The successful outcome suggests that planned ABO-incompatible lung transplants may be possible.     

A novel approach to successful ABO-incompatible high-titer renal transplantation

BACKGROUND: Currently the long-term outcome among recipients of ABO-incompatible renal transplantations is excellent in Japan. However, previous reports have documented poor outcomes in patients with high (> 1:256) anti-A/B antibody titers pretreatment. The immunosuppressive protocol for ABO-incompatible high-titer renal transplantation has remained a medical challenge. METHODS: We treated 3 patients with high (> 1:512) anti-A/B antibody titers prior to ABO-incompatible renal transplantation. Our immunosuppressive protocol was initiated 1 month prior to surgery and included mycophenolate mofetil (1 g/d) and low-dose steroid (methylprednisolone [8 mg/d]). Two doses of the anti-CD20 antibody rituximab, (150 mg/m(2)) were administered 2 weeks before and on the day of transplantation. We performed antibody removal with 6 to 8 sessions of plasmapheresis (plasma exchange or double-filtration plasmapheresis) before transplantation. Splenectomy was also performed on the day of transplantation. Postoperative immunosuppression followed the same regimen as ABO-compatible cases, in which calcineurin inhibitors were initiated 3 days before transplantation combined with 2 doses of basiliximab. RESULT: With this protocol, the anti-A/B antibody was reduced to below 1:16 in all cases. All 3 patients underwent successful transplantation with a mean current serum creatinine of 1.32 mg/dL (range, 1.22-1.50 mg/dL). There were no episodes of antibody-mediated rejection. No serious complications or side effects were encountered. CONCLUSIONS: A preconditioning protocol consisting of rituximab infusions, splenectomy, plasmapheresis, and pharmacologic immunosuppression enabled ABO-incompatible renal transplantation in patients with high (> 1:512) anti-A/B antibody titer.     

ABO-incompatible deceased donor liver transplantation with the use of antigen-specific immunoadsorption and anti-CD20 monoclonal antibody

In patients with fulminant liver failure requiring emergency liver transplantation, the only donor organ that becomes available may be ABO incompatible. The risk of graft failure because of antibody-mediated acute rejection is high, but can be reduced by various means. We reported a deceased donor ABO-incompatible liver allograft recipient who was treated with antigen-specific immunoadsorption in combination with anti-CD20 monoclonal antibody and conventional plasmapheresis and immunosuppression. The patient was a 33-yr-old male with blood group A who presented with subacute liver failure of unknown aetiology and received a blood group AB liver graft. Pretransplant he underwent plasmapheresis and received one dose of rituximab. The immunosuppressive regimen consisted of methylprednisolone, tacrolimus and mycophenolate mofetil. Despite regular post-operative plasmapheresis sessions, anti-B antibody titres increased. Antigen-specific immunoadsorption with depletion of anti-B antibodies was performed from day nine to day 17. Thereafter, anti-B IgM and IgG antibody titres remained low. After one month the patient was reoperated with hepaticojejunostomy because of bile duct necrosis and with reconstruction of a stenotic hepatic artery. A mild rejection was successfully treated with methylprednisolone four months post-transplant. At six months post-transplant there was a stricture of the biliary-enteric anastomosis, but the graft was well functioning. We conclude that antigen-specific immunoadsorption can be an important adjuvant therapy to control recipient anti-A/B antibody levels and prevent acute rejection in ABO-incompatible deceased donor liver transplantation.     

New protocol of immunosuppression for liver transplantation across ABO barrier: the use of Rituximab, hepatic arterial infusion, and preservation of spleen

INTRODUCTION: An ABO-incompatible (ABO-I) living donor liver transplantation (LDLT) is a challenge. Until 2000 systemic multidrug immunosuppression and splenectomy was the gold standard with poor results. Application of local administration with prostagrandin E1 (PGE1) and steroids via a portal vein (PV) catheter dramatically improved the survival from 20% to 60% but PV thrombus became a problem (35%). To solve it, an hepatic arterial (HA) catheter was used instead of a PV catheter and splenectomy was omitted. Although the PV thrombus problem was resolved, the ABO antibody titers significantly increased, and two cases of uncontrollable humoral rejection (HR) were experienced. In this study, Rituximab was introduced instead of splenectomy to decrease the antibody. We report the efficacy of prophylaxis with Rituximab for ABO-I LDLT. METHODS: Eight patients received. Rituximab at 2 to 14 days before LDLT. During the operation, the spleen was preserved. Methylpredonisolone and PGE1 were administered via an HA catheter for 2 to 3 weeks after LDLT in addition to an immunosuppressive regimen consisting of tacrolimus and steroids. Antibody titers were measured serially. RESULT: There was no clinical HR. Two patients died of complications unrelated to HR. The antibody titer decreased compared to patients without splenectomy/rituximab. B cells (CD19) were depleted from peripheral blood for up to 3 months. Cytomegalovirus infections were decreased compared to patients with splenectomy (P = .085). CONCLUSION: Rituximab prophylaxis and HA infusion therapy prevented clinical HR, which may provide a breakthrough to overcome the ABO blood-type barrier in liver transplantation.     

Successful case of adult ABO-incompatible liver transplantation: beneficial effects of intrahepatic artery infusion therapy: a case report

BACKGROUND: In Japan ABO-incompatible liver transplantation has been done on >100 occasions up to 2003. However, <30% are cases involving adults. The difficultly of ABO-incompatible liver transplantation is associated with the high frequency of humoral rejection and local disseminated intravascular coagulation (DIC), leading to many postoperative complications. We report a successful case of adult ABO-incompatible liver transplantation with the use of an intrahepatic artery infusion. METHODS: A 36-year-old man with Wilson disease, underwent living donor liver transplantation from an ABO-incompatible donor. The immunosuppressive therapy included multiple perioperative plasmaphereses, splenectomy, and treatment with tacrolimus, methylprednisolone, and cyclophosphamide. The dose and blood level of tacrolimus were the same as in ABO-compatible cases. In addition to these therapies, we administered an intrahepatic arterial infusion with prostaglandin (PG) E1 alone. RESULTS: After perioperative plasmapheresis and cyclophosphamide, antidonor blood group antibody titers remained undiluted and without vascular complications throughout the postoperative course, but there was a tendency for bleeding that continued for 10 days after transplantation. On postoperative day 10, a reexploration was performed for intraabdominal bleeding. During another operation on postoperative day 59 a biloma was found and drained. The patient has now survived for 120 days after transplantation with normal liver function. CONCLUSIONS: Beneficial effect of intrahepatic artery infusion with PGE1 seems to be useful in adult ABO-incompatible liver transplantation.     

Experiences and problems pre-operative anti-CD20 monoclonal antibody infusion therapy with splenectomy and plasma exchange for ABO-incompatible living-donor liver transplantation

BACKGROUND: ABO-incompatible living-donor liver transplantation (LDLT) requires a reduction of the anti-ABO antibody titer to <16 before transplantation, which is usually achieved by pre-operative plasma exchange (PE) or double-filtration plasmapheresis. ABO-incompatible transplantations have been performed after a splenectomy with heavy drug immunosupression plus B-cell-specific drugs. Here, we evaluated a pre-transplantation infusion protocol with an anti-CD20 monoclonal antibody (rituximab) for ABO-incompatible LDLT. METHODS: Between March 2002 and December 2005, 73 adult patients underwent LDLT without retransplantation in our institution. Among these cases, 57 were ABO-identical, 11 were ABO-compatible and five were ABO-incompatible. The rituximab infusion protocol consisted of a weekly infusion of rituximab (375 mg/m(2)) for three wk, which was administered to three of the five ABO-incompatible LDLT patients. All three patients underwent a pre-operative PE, as well as a splenectomy during the operation. A triple immunosuppression protocol of tacrolimus, low-dose steroids and mycophenolate mofetil (1500 mg/d) was administered post-operatively. In addition, the patients received a continuous intra-arterial infusion of prostaglandin E(1) and methylprednisolone, and a continuous intra-portal infusion of a protease inhibitor for three and two wk after transplantation, respectively. RESULTS: After the first rituximab infusion, the peripheral blood CD19(+) B cell count rapidly decreased to <1%. All three patients treated with rituximab subsequently received an ABO-incompatible LDLT, with donor/recipient blood groups of B/O, A(1)/B and A(1)/O. In two cases, the ABO-antibody level transiently increased post-operatively, then decreased and remained low. Rituximab infusion therapy did not develop any direct side effect except for mild allergic reaction to the first infusion, but post-operatively all three patients suffered a cytomegalovirus and were successfully treated with ganciclovir, and one patient had a MRSA-positive intra-abdominal abscess. Two patients are currently alive at 20 and 18 months respectively, and show normal graft-liver function. But one patient died of sepsis because of intra-abdominal abscess. CONCLUSIONS: Although the protocol of rituximab administration is a conventional and safe regimen with no major side effects, the development of a new protocol is needed for prevention of the infection with bone suppression.     

Living Donor Liver Transplantation with Special Reference to ABO-incompatible Grafts and Small-for-size Grafts

Living donor liver transplantation (LDLT) has developed on the basis of increased safety of conventional liver surgery and the need for expanding donor sources, especially in children. Indications for LDLT were soon extended to adult patients in Japan, where cadaveric donation was limited. The right liver is now routinely transplanted to adults to avoid small-for-size graft syndrome, even though the right liver graft has the disadvantages of less remaining donor liver and the question of donor safety. Assessing the suitable size or quality of the graft, as well as of the remnant donor liver, is one of the most important problems in adult LDLT. Although several tactics have been proposed to manage the small-for-size syndrome, their efficacy remains a question. We suggest that small-for-size syndrome is preventable by engaging in careful donor selection or using effective agents for hepatic microcirculatory disturbance control. Sometimes for LDLT only ABO-incompatible grafts are available from relatives, but they must be transplanted despite the expected poor outcome in adults and older children. To overcome the problems in this situation, we developed a novel protocol including intraportal infusion therapy with methylprednisolone, prostaglandin E₁, and gabexate mesylate. Two adult patients undergoing ABO- incompatible LDLT have now survived 53 and 35 months after transplantation with good liver function. However, the other two patients suffered thrombotic microangiopathy postoperatively and died owing to cerebral hemorrhage or multiple organ failure, respectively. Further investigation is needed to improve the outcome of liver transplantation across the ABO blood group barrier.This work was supported by grants-in-aid from the Ministry of Education, Science, and Culture and the Waksman Foundation of Japan.     

供受体ABO血型不合的肝移植围手术期处理

目的:探讨供受体ABO血型不合肝移植围手术期的处理方法及疗效。方法:回顾性分析我院实施的13例ABO血型不合肝移植的临床资料,对围手术期可能出现的并发症进行针对性预防,主要采用的措施包括血浆置换、术中显微镜下吻合肝动脉和胆道、切除脾脏、四联免疫抑制治疗,以及术后保持氧饱和度>95%、加强抗凝、预防感染等。结果:13例患者中,7例恢复良好,未出现并发症,其余6例患者中有3例出现急性排异反应,4例出现胆道非吻合口狭窄,4例死亡。结论:在供体缺乏而受者病情危急时,进行供受体ABO血型不合的肝移植是可行的,加强围手术期处理,有助于减少术后并发症,提高肝移植的疗效。     

Improved graft survival in ABO-incompatible living donor kidney transplantation

INTRODUCTION: We reviewed ABO-incompatible living donor kidney transplantations (LDKT) performed in our institute. PATIENTS: Fourteen ABO-incompatible LDKT were carried out in the first era (September 1990-August 1996) and 13 were in the second era (October 2001-July 2004). All patients were treated with sessions of plasmapheresis before transplantation to reduce antibody titers <1:8. In the second era, those with rebound increase of antibody titers >1:64 after repeated plasmapheresis were not subjected to transplantation. Posttransplantation immunosuppression consisted of cyclosporin, predonisone, azathioprine, gusperimus hydrochloride (DSG), and antilymphocyte globulin (ALG) in the first era, and tacrolimus, mycophenolate mofetil, predonisone, and DSG in the second era. Splenectomy was performed during the transplantation. Anticoagulant therapy was introduced in the second era. RESULTS: One-, 2-, and 5-year graft survival in the first era was 57%, 57%, and 50%, respectively, values that were significantly lower than those of ABO-compatible cases in the same period (n = 101), namely, 1-, 3-, and 5-year graft survival rates 93%, 83%, and 76%, respectively. The main reason for graft and patient losses was infectious complications. In the second era, no recipient suffered a severe infectious complication and 1- and 2-year graft survival rates were both 100%. Four patients in the first era and 1 in the second era experienced a graft rejection episode between 10 days and 14 months after transplantation, but they were successfully treated with steroid pulse therapy. CONCLUSION: Although patients with high blood group antibody titers remain problematic, ABO-incompatible LDKT is an increasingly viable option for patients whose only donor is blood group-incompatible.     

End-stage liver cirrhosis with severe autoimmune hemolytic anemia, treated by blood type-incompatible living donor liver transplantation: a case report

We present a case of successful living donor liver transplantation (LDLT) for liver cirrhosis caused by hepatitis B virus with severe autoimmune hemolytic anemia (AIHA) using an ABO-incompatible (ABOi) graft. The patient was a 47-year-old woman who had a history of ruptured esophageal varices, accumulation of intractable ascites, frequent hepatic encephalopathy and severe anemia, with a hemoglobin value of approximately 3 g/dL due to AIHA. We treated the patient by LDLT using an ABOi liver graft. The treatment strategy included anti-CD20 antibody, plasma exchange and transfusion before LDLT. The patient's anemia improved after surgery; she required only 2 units of irradiated red blood cell concentrates-leukocytes reduced. The patient was discharged from the hospital on postoperative day 35. Two years after surgery, the patient still shows normal hepatic and hematological findings. The immunomodulation protocol for ABOi LDLT was effective not only to avoid humoral reactions associated with ABOi LDLT, but also those associated with AIHA.     

Technical implications of living donor liver transplantation: a single-center experience

Liver transplantation for end-stage liver disease is the treatment of choice in current surgical practice. However, the shortage of cadaveric organs has limited this treatment option for many years. Living donor liver transplantation (LDLT) may be an option to overcome the organ shortage. In the present series we report a single-center experience with 39 LDLT performed from March 2000 to June 2003. The main indications for LDLT was hepatitis B cirrhosis (11 patients). The recipient hepatectomy was performed with caval preservation. The hepatic vein anastomosis was performed either to recipient hepatic vein or inferior vena cava. The portal vein anastomosis was performed either to the recipient's main or right portal branch. Biliary diversion was performed to the recipient biliary ducts if possible, otherwise to a jejunal loop in Roux-en-Y fashion. The survival rate at the end of one year was 71%. The leading cause of mortality was sepsis in five patients. Biliary complications developed in 20% of the recipients. All bile leaks were from the Roux-en-Y hepaticojejunostomy. Hepatic artery thrombosis was diagnosed in four patients by loss of hepatic blood flow on Doppler ultrasound. LDLT is a major surgical option for end-stage liver disease, particularly for countries with low rates of organ donation. However, there are technical challenges to be overcome such as small vessels from segmental grafts and multiple small bile ducts.     

Impact of recipient age on outcome of ABO-incompatible living-donor liver transplantation

BACKGROUND: Transplantation of hepatic grafts from ABO-incompatible donors is controversial because of the risk of hyperacute rejection mediated by preformed anti-ABO antibodies. The aim of the present study was to evaluate the outcome of liver transplants performed with ABO-incompatible living-donor livers and to detect risk factors for development of complications. METHODS: From June 1990 to February 2000, 66 patients, 10 months to 55 years old (median, 2 years old), received 68 ABO-incompatible living-donor liver grafts. The antibody titer and clinical course were followed prospectively during a period ranging from 3 to 11 years. RESULTS: The 5-year patient survival was 59%, 76%, and 80% for ABO-incompatible, ABO-compatible, and ABO-identical grafts, respectively (P<0.01). In patients <1 year old, > or =1 to <8, > or =8 to <16, and and > or =16 years old, 5-year survival was 76%, 68%, 53%, and 22%, respectively. The incidence of intrahepatic biliary complications and hepatic necrosis in ABO-incompatible living-related grafts (18% and 8%, respectively) was significantly (P<0.0001) greater than in ABO-compatible and ABO-identical grafts (both 0.6% and 0%, respectively). Predictive risk factors for increased mortality and morbidity were age greater than 1 year and elevated anti-ABO titers before transplantation. CONCLUSIONS: ABO-incompatible liver transplantation was carried out with relative safety in infants <1 year old but was not satisfactory in children >1 year in long-term follow-up. Patients aged >8 years remain at considerable risk of early fatal outcome because of hepatic necrosis, and new strategies to prevent antibody-mediated rejection are required.     

A Comparison of splenectomy versus intensive posttransplant antidonor blood group antibody monitoring without splenectomy in ABO-incompatible kidney transplantation

BACKGROUND: Although most protocols for ABO-incompatible kidney transplantation have employed splenectomy, its utility is unproven. The aim of the current study was to compare the outcomes of ABO-incompatible living donor kidney transplantation with splenectomy versus a protocol involving intensive posttransplant antibody monitoring to maintain low levels of antiblood group antibody. METHODS: We retrospectively studied all ABO-incompatible living donor kidney transplants at our institution between September 1999 and November 2004 (n=34). Prior to May 2003, all patients were included in a protocol involving pretransplant plasmapheresis and splenectomy at the time of transplant (n=23). After May 2003, splenectomy was not performed and a protocol that involved pretransplant anti-CD20 antibody and a more intensive posttransplant plasmapheresis regiment aimed at maintaining low levels of antiblood group antibody during the first 2 weeks following transplantation was utilized (n=11). RESULTS: Patient and graft survival was similar in the two groups. Humoral rejection occurred in 18% nonsplenectomized and 30% of splenectomized patients (P=0.68). Humoral rejection correlated with the baseline antibody titer in both groups. Individuals with elevated baseline antibody titer (> or =1:256) appear to be at high risk for humoral rejection regardless of protocol used. Antiblood group antibody levels 3 and 12 months after transplantation were similar in both groups. CONCLUSIONS: Splenectomy is not essential for successful ABO-incompatible kidney transplantation, although individuals with high baseline antidonor blood group antibody titers are at high risk for humoral rejection. The use of intensive posttransplant monitoring may help prevent antibody-mediated graft damage.     

Management of ABO-incompatible living-donor liver transplantation: Past and present trends

Based on the concept that the liver is a “privileged organ,” which resists acute rejection, Thomas Starzl introduced liver transplantation across the ABO blood group. However, with improved survival after liver transplantation came reports of an increased incidence of acute rejection, biliary and vascular complications, and decreased survival after ABO-incompatible liver transplantation. As a result, ABO-incompatible liver transplantations are performed only in emergencies when ABO-compatible grafts are unavailable. In living-donor liver transplantation (LDLT), donors are restricted to family members; therefore, breaking ABO blood group barriers becomes inevitable. This inevitable situation has forced liver transplant surgeons to exploit many innovative techniques to overcome the challenges of ABO-incompatible liver transplantation. This review looks at the history and current practices of ABO-incompatible LDLT to provide insight so that the protocol can be improved further.     

Antibody-mediated rejection after adult ABO-incompatible liver transplantation remedied by gamma-globulin bolus infusion combined with plasmapheresis

Adult ABO-incompatible liver transplantation has been known to be associated with markedly desperate outcomes. Antibody-mediated rejection (AMR) has been recognized as one of the primary causes of these desperate outcomes, but its clinical features and significance have not been well understood. Recently, some clinicians have succeeded in improving the outcome of adult ABO-incompatible liver transplantation. However, in some transplant patients undergoing these treatments, AMR has still led to graft losses. We recently encountered two patients suffering from AMR after adult ABO-incompatible liver transplantation and remedied their conditions with various therapeutic modalities including direct hepatic infusion therapy and gamma-globulin bolus infusion therapy combined with plasmapheresis. In this article, we describe the clinical features of these patients and the therapeutic strategies we applied. Furthermore, we show the histologic course of the recovery from AMR in the second patient, from whom we were able to extract serial liver biopsies.     

双重滤过血浆置换在ABO血型不合肝移植中的应用

目的  观察双重滤过血浆置换(DFPP)清除ABO血型不合肝移植患者血型抗体的效果和安全性。 方法  选取武警总医院2012年1月至2014年12月行ABO血型不合肝移植受者18例,定为血型不合组。术前检测受者的抗A或抗B血型抗体滴度＞1∶16者行DFPP;另选取同期符合输血原则的肝移植受者20例作为对照组。观察ABO血型不合肝移植受者应用DFPP的抗体滴度、血液生化指标变化情况,以及并发症发生情况;比较血型不合组和对照组受者的急性排斥反应发生率和病死率。 结果  18例患者中,15例术前抗A或抗B血型抗体滴度＞1∶16,行DFPP治疗。与DFPP前相比,DFPP后受者血型抗体滴度平均水平明显下降。血液生化检测发现,纤维蛋白原水平在DFPP后显著下降(P=0.0001)。20例次DFPP中,出现低血压3例次,出血3例次,恶心、呕吐1例次,管路凝血1例次,予对症治疗后好转。经DFPP处理过的血型不合组和对照组的急性排斥反应发生率和病死率比较,差异无统计学意义(均为P＞0.05)。 结论  DFPP能安全有效地降低血型抗体水平,减少肝移植术后急性排斥反应发生率,提高移植的成功率。     

ABO-incompatible adult living donor liver transplantation for hepatocellular carcinoma

Living donor liver transplantation (LDLT) offers timely transplantation for patients with hepatocellular carcinoma (HCC). If ABO-incompatible LDLT is feasible, the need for pretransplantation treatment may be eliminated, which may reduce overall morbidity. In this article, we have described 8 adult HCC patients who successfully underwent LDLT from ABO-incompatible donors. Antirejection therapy included multiple preoperative plasmaphereses, splenectomy, and an immunosuppressive regimen with tacrolimus, methylprednisolone, and mycophenolate mofetil. The maintenance dose of immunosuppression did not differ from that of the ABO-identical cases. In addition, we also performed intrahepatic arterial infusion of prostaglandin E1. In 5 patients, we administered a single dose of rituximab, a chimeric CD20 monoclonal antibody. As a result of this treatment, 6/8 patients are still alive. Our experience has shown that it is possible to control antibody-mediated humoral rejection and other complications in adult ABO-incompatible LDLT.     

Complications, resource utilization, and cost of ABO-incompatible living donor kidney transplantation

BACKGROUND: The transplantation of living donor renal allografts across blood group barriers requires protocols to reduce and maintain anti-blood group antibody at safe levels. These protocols lead to an increase in resource utilization and cost of transplantation and may result in increased complications. METHODS: In this retrospective study, we compared 40 ABO-incompatible to 77 matching ABO-compatible living donor renal allografts with respect to complications, resource utilization, and cost from day -14 to 90 days after transplantation. RESULTS: Overall, surgery-related complications and resource utilization were increased in the ABO-incompatible group, primarily due to the desensitization protocol and antibody-mediated rejection. In the absence of rejection, the mean number of complications was similar for both groups. ABO-incompatible kidney transplantation was approximately 38,000 US dollars more expensive than ABO-compatible transplants, but was cost effective when compared to maintaining the patient on dialysis while waiting for a blood group compatible deceased donor kidney. Actuarial graft and patient survival was similar in the two groups. CONCLUSIONS: We conclude that ABO-incompatible living donor kidney transplantation is a viable option for patients whose only donor is blood group incompatible despite the additional resource utilization and cost of therapy.