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SCT Recipients (sct + recipient)

Distribution by Scientific Domains

Medical Sciences	83%

Selected Abstracts

Quantitative temporal and spatial distribution of adenovirus type 2 correlates with disease manifestations and organ failure during disseminated infection

JOURNAL OF MEDICAL VIROLOGY, Issue 2 2008
Dirk Forstmeyer
Abstract Disseminated adenovirus (HAdV) infections are serious complications in allogenic stem cell transplant (SCT) recipients. Quantitative HAdV DNA detection in blood samples demonstrated the association of high virus loads with disease and improved early diagnosis. However, the pathogenesis of disseminated HAdV disease, for example sources of HAdV DNA shedding in the blood stream and association of HAdV replication sites with disease manifestations, remained obscure. In this report, 24 bioptic and autoptic organ and tissue samples of an adult SCT recipient suffering from disseminated infection were quantitatively analyzed for HAdV DNA. Results indicate subsequent virus replication in the colon, bone marrow and liver as origin of HAdV DNAemia, which increased from 1.4,×,104 copies/ml to a peak of 2,×,109 copies/ml over a period of 84 days in spite of antiviral therapy. Symptoms as diarrhoea, bone marrow failure and hepatic failure were clearly linked to high HAdV DNA concentrations in affected organs. For example, the HAdV DNA level was 2.2,× 103 copies/cell in a colon biopsy when the patient suffered from diarrhoea whereas only 1.1,× 101 copies/cell were detected when symptoms had improved. Focal HAdV infection of the liver as demonstrated by laser microdissection was followed by fulminant virus replication with 1.3,×,105 copies of HAdV DNA/cell causing terminal hepatic failure. In conclusion, pathogenesis of disseminated HAdV disease was associated with virus replication in affected organs and not immune mediated as suggested recently by a fatal case of gene therapy with a non-replication competent HAdV-C5 vector. J. Med. Virol. 80:294,297, 2008. © 2007 Wiley-Liss, Inc. [source]

Acyclovir-resistant herpes simplex virus pneumonia post-unrelated stem cell transplantation: A word of caution

PEDIATRIC TRANSPLANTATION, Issue 8 2007
Haydar Frangoul
Abstract: HSV causes serious complications in immunocompromised patients, especially SCT recipients. Although ACV is an effective antiviral prophylaxis, the emergence of ACV resistance is a growing problem. The authors describe two cases of fatal ACV-resistant HSV in two pediatric patients following unrelated donor SCT. Despite the in vitro sensitivity of the HSV isolates to foscarnet, both patients failed to respond to foscarnet therapy. Other antiviral therapies should be considered in those patients who fail to show rapid clinical improvement. [source]

Ex vivo generation of cytokine-induced killer cells (CD3+ CD56+) from post-stem cell transplant pediatric patients against autologous,Epstein,Barr virus,transformed lymphoblastoid cell lines

PEDIATRIC TRANSPLANTATION, Issue 5 2007
Sawang Petvises
Abstract:, EBV-PTLDs affect as high as 20% of SCT recipients especially those with T-cell depleted grafts while high mortality rates were also noted. Adoptive allogeneic and autologous CTLs have a therapeutic potential in this setting. However, the process of expansion of these cells is tedious and time consuming in both allogeneic and autologous CTL generation. For the allogeneic SCT, another major obstacle is unavailability of donors especially in an unrelated SCT setting. The aim of the present study was therefore to investigate the efficacy of autologous CIK cells (CD3+ CD56+) against autologous EBV-LCLs from post-SCT pediatric patients. We could demonstrate that CIK cells can be generated within two wk and did show the significant cytotoxicity against autologous EBV-LCLs. CIK cells may provide a potent tool for use in post-transplantation adoptive immunotherapy. [source]

Recommendations for immunizations in stem cell transplantation

PEDIATRIC TRANSPLANTATION, Issue 2003
Deborah C. Molrine
Abstract: Investigations over the past decade have documented that there is a decline in immunity to vaccine preventable diseases in many SCT recipients. The majority of immunization studies conducted in SCT recipients to date support the use of multi-dose regimens for most protein and polysaccharide-conjugate vaccine antigens. The consensus immunization schedule recommended by ACIP/IDSA/ASBMT provides guidance for centers to utilize available vaccines in their SCT populations. With the exception of pneumococcal disease, a schedule beginning at 12 months after SCT is reasonable given the low incidence of disease in HSCT recipients for most of the recommended vaccines and improved immune reconstitution in most recipients by one year post transplant. SCT recipients respond poorly to unconjugated pneumococcal polysaccharide vaccine and the development of polysaccharide-protein conjugate vaccines against S. pneumoniae holds promise to impact potentially on clinical disease in this population. In addition, the strategy of donor immunization may also be effective in eliciting early protective immune responses to vaccine antigens. Future challenges will be the development of safe and effective vaccines against the viral pathogens responsible for considerable morbidity and mortality after SCT. [source]

Caregiver and patient marital satisfaction and affect following hematopoietic stem cell transplantation: a prospective, longitudinal investigation

PSYCHO-ONCOLOGY, Issue 3 2003
Shelby Langer
The process of stem cell transplantation (SCT) is both intra and inter dependent; like patients, spousal caregivers (CGs) are affected by the experience. Few empirical investigations have focused on the needs of CGs or dyadic differences over the course of adaptation,the foci of the present study. SCT recipients and spousal CGs (n=131 dyads) completed the Profile of Mood States (POMS) and the Dyadic Adjustment Scale at three time points: pre-transplant, 6 months post-transplant and 1 year post-transplant. A separate, non-medical group completed the POMS as a normative sample. CGs reported higher levels of depression and anxiety as compared to patients and non-medical norms. With respect to marital satisfaction, couples were matched in their perceptions of the relationship prior to transplantation but grew mismatched over time. Six months and 1 year post-transplant, CGs reported lower levels of marital satisfaction relative to their patient counterparts. Counter to prediction, change in CG marital satisfaction (from pre-transplant to 1 year post-transplant) was predicted only by CG gender, not patient physical, nor psychosocial characteristics. Findings offer implications for person-specific and relationship-protective interventions. Copyright © 2002 John Wiley & Sons, Ltd. [source]