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1.
Lab Anim ; 56(6): 540-549, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-35850552

RESUMO

The objective of this study was to describe prolonged surgical anaesthesia and recovery in fire salamanders (Salamandra salamandra) using tricaine methanesulfonate (MS-222). A total of 14 salamanders were anaesthetised for electromyography wire implantation. Sodium bicarbonate buffered solutions (0.5-4 g l-1) of MS-222 were prepared (adjusted to pH 7.0). Anaesthesia was induced by partial immersion in pre-oxygenated 3 g l-1 solution for 20 min. Buprenorphine (0.5 mg kg-1) was administered subcutaneously. During microsurgery, heart rate (HR), solution pH and temperature were recorded. Reflectance pulse oximeter (SpO2) (Masimo Rad-57) was recorded in two salamanders. Anaesthetic plane and MS-222 pH stability (pH 7.6) were maintained by renewing administration of oxygenated MS-222 solution (0.5-3 g l-1) onto swabs that partially covered the body. Recovery started at the end of surgery (MS-222 0 g l-1). Postoperatively, salamanders were given oral meloxicam (0.2 mg kg-1). Mean time for loss of righting reflex during induction was 13.7 ± 2.2 min. Duration of anaesthesia and time to recovery were 111 ± 24.2 and 31 ± 10.3 min, respectively. Due to complications, two salamanders did not recover. Baseline HR was 67.4 ± 34.5 beats/min, and it decreased significantly until recovery (p ≤ 0.0001). In two salamanders, baseline SpO2 was 85.5% ± 14.5, SpO2 during surgery was 61% ± 6.4, improving to 80.5% ± 2.1 on recovery.In conclusion, prolonged recovery anaesthesia is achievable with MS-222 dilutions in salamander. Reflectance SpO2 could prove valuable during immersion anaesthesia.


Assuntos
Anestesia , Salamandra , Animais , Aminobenzoatos , Anestesia/métodos , Mesilatos
2.
PLoS One ; 16(3): e0248204, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33720946

RESUMO

Copper (Cu), iron (Fe), and zinc (Zn) are essential trace minerals for the reproduction, growth, and immunity of mammalian herbivore populations. We examined the relationships between Cu, Fe, and Zn in soils, common plants, and hepatic stores of two wild herbivores to assess the effects of weather, sex, and population density on the transfer of trace minerals from soils to mammals during the growing season. Soils, grasses, woody browse, hispid cotton rats (Sigmodon hispidus), and white-tailed deer (Odocoileus virginianus) were sampled across 19 sites. Concentrations of Cu, Fe, and Zn in grasses and browse species were not correlated with concentrations of those minerals in soils sampled from the same areas. Leaves of woody browse were higher in Cu, lower in Fe, and similar in Zn when compared with grasses. Available concentrations of soils were positively related to liver Cu and Zn in hispid cotton rats, which was consistent with the short lives and high productivity of these small mammals that rely on grass seed heads. Interactions between soil concentrations and weather also affected liver Cu and Fe in deer, which reflected the greater complexity of trophic transfers in large, long-lived, browsing herbivores. Population density was correlated with liver concentrations of Cu, Fe, and Zn in hispid cotton rats, and concentrations of Cu and Fe in deer. Liver Cu was < 5 mg/kg wet weight in at least 5% of animals at two of eight sites for hispid cotton rats and < 3.8 mg/kg wet weight in at least 5% of animals at three of 12 sites for deer, which could indicate regional limitation of Cu for populations of mammalian herbivores. Our data indicate that supplies of trace minerals may contribute to density dependence of herbivore populations. Local population density may therefore influence the prevalence of deficiency states and disease outbreak that exacerbate population cycles in wild mammals.


Assuntos
Cobre/metabolismo , Cervos/fisiologia , Ferro/metabolismo , Sigmodontinae/fisiologia , Zinco/metabolismo , Animais , Cobre/análise , Feminino , Herbivoria , Ferro/análise , Fígado/química , Fígado/metabolismo , Masculino , Estações do Ano , Solo/química , Oligoelementos/análise , Oligoelementos/metabolismo , Zinco/análise
3.
Transpl Infect Dis ; 12(4): 371-4, 2010 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-20163566

RESUMO

'Transplant tourism,' the practice of traveling abroad to acquire an organ, has emerged as an issue in kidney transplantation. We treated a patient who developed invasive aspergillosis of the allograft vascular anastomosis after receiving a kidney transplant in Pakistan, prompting us to review the literature of invasive mycoses among commercial organ transplant recipients. We reviewed all published cases of infections in solid organ transplant recipients who bought their organs abroad and analyzed these reports for invasive fungal infections. Including the new case reported here, 19 cases of invasive fungal infections post commercial kidney transplant occurring in 17 patients were analyzed. Infecting organisms were Aspergillus species (12/19; 63%), Zygomycetes (5/19; 26%), and other fungi (2/19; 5%). Invasive mold infections were present at the transplanted graft in 6/17 patients (35%) with graft loss or death in 13/17 (76%) of patients and overall mortality (10/17) 59%. Invasive fungal infections, frequently originating at the graft site, have emerged as a devastating complication of commercial renal transplant and are associated with high rates of graft loss and death.


Assuntos
Comércio , Fungos/isolamento & purificação , Transplante de Rim/efeitos adversos , Micoses/microbiologia , Viagem , Idoso , Ásia , Aspergilose/microbiologia , Fungos/classificação , Humanos , Transplante de Rim/economia , Masculino , Oriente Médio , Mucormicose/microbiologia , Paquistão
4.
J Parasitol ; 104(1): 89-95, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-28985160

RESUMO

Next-generation sequencing methodologies open the door for evolutionary studies of wildlife parasites. We used 2 next-generation sequencing approaches to discover microsatellite loci in the pocket gopher chewing louse Geomydoecus aurei for use in population genetic studies. In one approach, we sequenced a library enriched for microsatellite loci; in the other approach, we mined microsatellites from genomic sequences. Following microsatellite discovery, promising loci were tested for amplification and polymorphism in 390 louse individuals from 13 pocket gopher hosts. In total, 12 loci were selected for analysis (6 from each methodology), none of which exhibited evidence of null alleles or heterozygote deficiencies. These 12 loci showed adequate genetic diversity for population-level analyses, with 3-9 alleles per locus with an average HE per locus ranging from 0.32 to 0.70. Analysis of Molecular Variance (AMOVA) indicated that genetic variation among infrapopulations accounts for a low, but significant, percentage of the overall genetic variation, and individual louse infrapopulations showed FST values that were significantly different from zero in the majority of pairwise infrapopulation comparisons, despite all 13 infrapopulations being taken from the same locality. Therefore, these 12 polymorphic markers will be useful at the infrapopulation and population levels for future studies involving G. aurei. This study shows that next-generation sequencing methodologies can successfully be used to efficiently obtain data for a variety of evolutionary questions.


Assuntos
Geômis/parasitologia , Iscnóceros/genética , Repetições de Microssatélites/genética , Parasitologia/métodos , Polimorfismo Genético , Animais , DNA/química , DNA/isolamento & purificação , Infestações por Piolhos/parasitologia , Infestações por Piolhos/veterinária , Polimorfismo Genético/genética , Doenças dos Roedores/parasitologia , Análise de Sequência/métodos , Análise de Sequência/veterinária
5.
Int J Tuberc Lung Dis ; 20(8): 1130-4, 2016 08.
Artigo em Inglês | MEDLINE | ID: mdl-27393551

RESUMO

SETTING: A 42-bed hospital operated by the Medical Research Council (MRC) Unit in The Gambia. OBJECTIVE: To devise, test and evaluate a cost-efficient uninterrupted oxygen system in the MRC Hospital. DESIGN: Oxygen cylinders were replaced with oxygen concentrators as the primary source of oxygen. An uninterruptable power supply (UPS) ensured continuity of power. Hospital staff were trained on the use of the new system. Eight years post-installation, an analysis of concentrator maintenance needs and costs was conducted and user feedback obtained to assess the success of the system. RESULTS: The new system saved at least 51% of oxygen supply costs compared to cylinders, with savings likely to have been far greater due to cylinder leakages. Users indicated that the system is easier to use and more reliable, although technical support and staff training are still needed. CONCLUSION: Oxygen concentrators offer long-term cost savings and an improved user experience compared to cylinders; however, some technical support and maintenance are needed to upkeep the system. A UPS dedicated to oxygen concentrators is an appropriate solution for settings where power interruptions are frequent but short in duration. This approach can be a model for health systems in settings with similar infrastructure.


Assuntos
Países em Desenvolvimento , Oxigenoterapia/instrumentação , Oxigênio/administração & dosagem , Administração por Inalação , Redução de Custos , Análise Custo-Benefício , Países em Desenvolvimento/economia , Desenho de Equipamento , Seguimentos , Gâmbia , Custos Hospitalares , Humanos , Oxigênio/economia , Oxigenoterapia/economia , Oxigenoterapia/métodos , Avaliação de Programas e Projetos de Saúde , Fatores de Tempo
6.
J Mol Biol ; 292(5): 1083-93, 1999 Oct 08.
Artigo em Inglês | MEDLINE | ID: mdl-10512704

RESUMO

The resonance assignments, secondary structure and backbone dynamics of the ETS domain of the transcription factor PU.1 have been determined for the free protein in solution by NMR spectroscopy. The secondary structure for the free ETS domain is similar to that observed in the crystal structure of the PU.1 protein complexed with DNA, except that helix alpha2 and recognition helix alpha3 are shorter for the free protein in solution. Backbone dynamics of the protein have been examined using amide hydrogen-deuterium exchange and (15)N laboratory-frame spin relaxation measurements. A significant probability of local unfolding of helix alpha2, which precedes the loop-helix-loop DNA recognition domain, is inferred from the very fast hydrogen-deuterium exchange for amide protons in this helix. The (15)N relaxation measurements indicate that the protein is partially oligomerized at a concentration of 2.5 mM, but monomeric at a concentration of 0.3 mM. The (15)N relaxation data for the low concentration sample were interpreted, using the model-free formalism, to provide insight into protein dynamics on picosecond-nanosecond and microsecond-millisecond time scales. High flexibility of the protein backbone is observed for the residues in the loop between alpha2 and alpha3. This loop is variable in length and in structure within the class of winged helix proteins and is partially responsible for binding to DNA. The dynamic properties observed for alpha2, alpha3 and the intervening loop may indicate a correlation between protein plasticity in particular structural elements and recognition of specific DNA sequences.


Assuntos
Ressonância Magnética Nuclear Biomolecular , Fragmentos de Peptídeos/química , Fragmentos de Peptídeos/metabolismo , Proteínas Proto-Oncogênicas/química , Proteínas Proto-Oncogênicas/metabolismo , Transativadores/química , Transativadores/metabolismo , Motivos de Aminoácidos , Sequência de Aminoácidos , Sequência Conservada , Proteínas de Ligação a DNA/química , Proteínas de Ligação a DNA/metabolismo , Deutério/metabolismo , Difusão , Hidrogênio/metabolismo , Cinética , Modelos Moleculares , Dados de Sequência Molecular , Ligação Proteica , Dobramento de Proteína , Estrutura Secundária de Proteína , Prótons , Solventes
7.
Transplant Proc ; 37(2): 1283-4, 2005 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-15848696

RESUMO

INTRODUCTION: Herein we report 10- to 15-year results of simultaneous pancreas-kidney (SPK) transplants in 135 type I and type II insulin-dependent diabetes mellitus (IDDM) patients. METHODS: Diabetes type was defined by the absence (type I) or presence (type II) of C-peptide. The freedom from dialysis and need for insulin defined graft survival. Patient survival was verified by record review and the Social Security Death Registry. The mean follow-up exceeded 100 months. RESULTS: Type II IDDM present in 28% of the 135 cohort, predominately among African-Americans (AA). The type II group was two-thirds AA (43% of the total AA patients) and 17% of the non-African-American (nAA) group. The difference between the two groups by C-peptide level was significant (P = .001). Type II patients had a higher body mass index, were slightly older at the onset of DM, but had similar duration of IDDM before ESRD. At 5 and 10 years, pancreas survival for type 1 DM was 71% and 49%; for type II DM it was 67% and 56% (P = .52). Kidney survival for type I DM was 77% and 50%; for type II it was 72% and 56% (P = .65). Patient survival for type I DM was 85% and 63%; for type II DM it was 73% and 70% (P = .98). CONCLUSIONS: We conclude that the outcomes of SPK transplants are equivalent regardless of diabetes type. Accordingly, the decision whether to perform pancreas transplants in diabetic recipients of kidney allografts should be based on general acceptance criteria not diabetes type.


Assuntos
Diabetes Mellitus Tipo 1/cirurgia , Diabetes Mellitus Tipo 2/cirurgia , Falência Renal Crônica/cirurgia , Transplante de Rim/fisiologia , Transplante de Pâncreas/fisiologia , Adulto , População Negra , Peptídeo C/sangue , District of Columbia , Seguimentos , Sobrevivência de Enxerto , Humanos , Transplante de Rim/mortalidade , Transplante de Pâncreas/mortalidade , Estudos Retrospectivos , Análise de Sobrevida , Fatores de Tempo , Resultado do Tratamento
8.
Transplant Proc ; 37(2): 699-700, 2005 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-15848506

RESUMO

BACKGROUND: The outcome differences between ethnic groups after kidney transplantation have led to the characterization of African Americans (AA) as having high immune risk. Several multicenter clinical trials have reported better outcomes when AA receive higher doses of immunosuppression (I/S), suggesting pharmacokinetic (PK) and pharmacodynamic (PD) differences. However, the donor source has not been cited as an risk factor for outcome. METHODS: Patient and graft survival rates of 469 AA were compared with 308 non-African Americans (nAA) who received kidney transplants between January 1, 1995 and December 31, 2002, and were followed-up through December 31, 2003. Gender, age, and I/S protocol were not different between the groups. Based on outcomes, open and laparoscopic donor groups were combined for analysis. Deceased donor kidneys comprised 49% of the AA kidneys but only 32% of the nAA kidneys (P < .000). Kaplan-Meier survival statistics were used for both patient and graft survival. RESULTS: Patient survival rates for AA compared with nAA at 1, 3, 5, and 7 years were not statistically different for living (log rank statistic, 1 df, P = .56) versus deceased donor kidneys (log rank statistic, 1 df, P = .15). Kidney graft survival rates for AA compared with nAA at 1, 3, 5, and 7 years for living donor were similar (log rank statistic, 1 df, P = .493), but significantly different for deceased donor kidneys (log rank statistic, 1 df, P = .026). CONCLUSIONS: The majority of living donation occurred between ethnically similar donor-recipient pairs, whereas deceased donors tended to be nAA. The difference demonstrated by donor source suggests that antigens may be more dissimilar or uniquely different between ethnic groups.


Assuntos
Negro ou Afro-Americano , Sobrevivência de Enxerto/fisiologia , Doadores Vivos , Adulto , Distribuição por Idade , Idoso , Cadáver , District of Columbia , Feminino , Humanos , Transplante de Rim/mortalidade , Transplante de Rim/fisiologia , Masculino , Pessoa de Meia-Idade , Grupos Raciais , Análise de Sobrevida , Doadores de Tecidos , Resultado do Tratamento
9.
Arch Intern Med ; 136(6): 682-7, 1976 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-1275624

RESUMO

Lymphocyte blastogenic transformation in response to plant lectins and allogenic cells was studied in patients with nonuremic, far-advanced, chronic renal failure and in healthy controls. Cell cultures were studied in the presence of normal sera, patient's sera, and with media of different buffering capacities. Minimal blastogenic depression was observed when patient's lymphocytes were cultured in indifferent plasma with effective bicarbonate buffering compared with the use of pooled patient's plasma or HEPES buffer. Fresh plasma in culture depressed concanavalin A (Con A) blastogenesis. The data suggest that, under optimal conditions, lymphocytes from patients with chronic severe renal insufficiency are more responsive to stimuli than previously reported and as a group are near normal control values. Further, the defect observed may be a result of intracellular acidosis.


Assuntos
Falência Renal Crônica/imunologia , Ativação Linfocitária , Diálise Renal , Adulto , Concanavalina A/farmacologia , Humanos , Falência Renal Crônica/sangue , Lectinas/farmacologia , Masculino , Mitógenos/farmacologia
10.
Gene ; 57(2-3): 203-11, 1987.
Artigo em Inglês | MEDLINE | ID: mdl-3692168

RESUMO

Initiation of replication of the resistance plasmid R1 is carefully regulated by the two negatively acting factors, CopA and CopB. It is shown here that the temperature-dependent runaway-replication phenotype of an R1 plasmid mutant is caused by two point mutations in each of the promoters for the genes of these control factors. Expression of the two genes is affected in the following way: (1) one C-to-T transition in the putative -35 box of the copB-repA operon creates a two- to three-fold stronger promoter from which expression is temperature-dependent; (2) another C-to-T transition in a G + C-rich area immediately downstream from the -10 box of the copA promoter reduces expression of the copA gene three-fold. The phenotypic consequences of the two mutations are discussed in the light of the current model for R1 replication control.


Assuntos
Replicação do DNA , Mutação , Fatores R , Sequência de Bases , Mapeamento Cromossômico , Fenótipo , Regiões Promotoras Genéticas , Temperatura , Transcrição Gênica
11.
Gene ; 28(1): 45-54, 1984 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-6329915

RESUMO

By insertion of a DNA fragment, containing the phage lambda pR promoter and the pM-promoted cI857 allele of the lambda repressor gene, in plasmid R1 upstream of the replication control genes, cloning vectors have been constructed which are present in one copy per chromosome at temperatures below 37 degrees C, and which display uncontrolled replication at 42 degrees C. Derivatives have been made which carry the R1 par region, stabilizing the plasmid at low temperature when grown in the absence of selection pressure. Cells harbouring these plasmids stop growing after 1-2 h incubation at 42 degrees C, and at this time 50% of the total DNA in the cells is plasmid DNA corresponding to more than 1000 plasmid molecules per cell. Concomitant with plasmid amplification at the high temperature, synthesis of plasmid-coded gene products is amplified, and these vectors can therefore be utilized for obtaining greatly enhanced yields of gene products that may be detrimental to the host cell when present in large amounts.


Assuntos
Regulação da Expressão Gênica , Vetores Genéticos , Plasmídeos , Replicação do DNA , DNA Bacteriano/biossíntese , DNA Recombinante/biossíntese , Óperon , Temperatura
12.
Transplantation ; 71(12): 1862-4, 2001 Jun 27.
Artigo em Inglês | MEDLINE | ID: mdl-11455272

RESUMO

BACKGROUND: There is controversy whether laparoscopic donor nephrectomy (LDN) is the procedure of choice for live kidney donors. The purpose of this survey therefore was to determine the current practices, attitudes, and plans regarding LDN in high-volume renal transplant centers. METHODS: Medical directors of the 31 highest volume kidney transplant centers were surveyed via telephone. Kidney transplant data for 1998 and 1999 were collected. RESULTS: The surveyed centers performed 5213 transplantations in 1998, representing 43% of all kidney transplantations done nationally. Twelve (39%) of the 31 centers performed LDN in 1998, increasing to 20 (65%) of 31 in 1999. Of 1174 live donor operations performed by the 20 centers in 1999, 365 (31%) were LDNs. Among the surveyed centers, four had no plans to begin an LDN program. The most commonly cited incentive for LDN was "shorter recovery time," whereas the most common disincentive was "concern about graft quality." A combination of observation and animate laboratory was the most commonly reported method of learning the LDN procedure. Six-month follow-up interviews found that 26 (84%) of 31 centers had performed LDN; only 1 of the 31 centers had no plans to perform LDNs. CONCLUSIONS: LDN may be the de facto procedure of choice for live donors within the next year. Efforts should now focus on improving techniques for performing and teaching this procedure.


Assuntos
Laparoscopia/estatística & dados numéricos , Doadores Vivos/estatística & dados numéricos , Nefrectomia/métodos , Nefrectomia/estatística & dados numéricos , Transplante de Órgãos/estatística & dados numéricos , Coleta de Dados , Humanos , Estados Unidos
13.
Transplantation ; 39(2): 151-6, 1985 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-3881854

RESUMO

Data collected prospectively on 3811 cadaver renal transplants performed between June 1977 and July 1982 by the 42 member institutions of the South-Eastern Organ Procurement Foundation (SEOPF) were analyzed to determine whether donor-recipient differences in sub-typic HLA-A,B specialties (splits) influenced outcome. The number of HLA-A,B antigens matched and mismatched between each donor and recipient was calculated in three ways: (1) considering all antigens and splits as distinct (not matched); (2) considering all splits as only matched with their corresponding typic antigen (but not with each other); and (3) considering all splits as matched with both their corresponding typic antigen as well as each other. Overall graft survival, graft loss from irreversible rejection, and patient survival stratified by the level of HLA match were the same using all three methods. In addition, using multivariate Cox regression analysis, the strong association between good HLA matching and increased graft survival was the same using all three methods of matching. Patients with a given number of mismatched antigens had no significant decrease in survival when additional splits were considered mismatched with each other or their corresponding typic antigen. These results suggest that matching of typic HLA-A,B antigens plays a highly significant role in reducing graft rejection but that donor-recipient differences in splits have a negligible effect on graft outcome.


Assuntos
Antígenos HLA/análise , Transplante de Rim , Sobrevivência de Enxerto , Humanos , Rim/imunologia , Fatores de Tempo
14.
Transplantation ; 20(5): 404-9, 1975 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-1108314

RESUMO

Thirty-four renal transplant recipients received drip infusion urograms from 2-24 days post-transplantation. Twenty-two patients exhibited changes in renal function within 1-4 days of the urogram that were indistinguishable from allograft rejection: a tender, swollen kidney, elevation of serum creatinine, oliguria, decreased urine sodium concentration, weight gain, and hypertension. Two patients developed acute tubular necrosis and required hemodialysis, but renal function in the remaining 20 patients improved after therapy for "graft rejection" with i.v. methyprednisolone sodium succinnate. Kidneys from older-age donors that were functioning suboptimally and kidneys which exhibited subsequent clinical allograft rejection were more at risk for contrast media toxicity. This suggests that occult vascular lesions may have been present in the allograft which were exacerbated when exposed to the irritant vascular effects of contrast media, producing a mild, reversible toxic nephritis. However, several kidneys with normal function and several kidneys which never exhibited rejection activity were also adversely affected by exposure to contrast media. It appears these agents should be used cautiously, if at all, in the early post-transplant period.


Assuntos
Diatrizoato de Meglumina/efeitos adversos , Diatrizoato/análogos & derivados , Rim/fisiopatologia , Creatinina/sangue , Dactinomicina/uso terapêutico , Rejeição de Enxerto/efeitos da radiação , Humanos , Rim/diagnóstico por imagem , Transplante de Rim , Metilprednisolona/uso terapêutico , Complicações Pós-Operatórias , Radiografia , Radioterapia , Fatores de Tempo , Transplante Homólogo
15.
Transplantation ; 67(2): 200-6, 1999 Jan 27.
Artigo em Inglês | MEDLINE | ID: mdl-10075581

RESUMO

BACKGROUND: The objective of this study was to determine if allopurinol (AL) and/or trifluoperazine (TFP) added to the Belzer machine preservation solution (MPS) improves the function of non-heart-beating donor (NHBD) canine kidneys. METHODS: Anesthetized canines underwent bilateral dissection of the renal vessels, obtaining baseline flow. After removing one kidney (heart-beating donor [HBD]), the dog was exsanguinated. After remaining in situ for 120 min (30-min warm ischemia time, 90-min cold ischemia time), the second kidney was removed (NHBD), flushed, biopsied, and weighed. The kidneys were machine-perfused separately for 20 hr, and pressure, flow, and resistance were measured serially. The kidneys were randomly assigned to a perfusate group (G): G1=MPS, G2=MPS+TFP, G3=MPS+AL, and G4=MPS+TFP+AL. Kidneys were implanted separately into a single recipient dog. Flow, resistance, and urine output were measured serially for 4 hr. Blood and urine samples and kidney biopsies were then obtained. All measurements were standardized to 100 g of kidney weight. RESULTS: HBD kidneys functioned better than NHBD kidneys in all groups, as expected. Although perfusate G1 was the most effective solution for HBD kidneys, the TFP additive (perfusate G2) more effectively reversed the vasospastic effects of ischemia/reperfusion for NHBD than the MPS solution (G1) with or without other additives. In HBD kidneys, the addition of AL resulted in the best creatinine clearance; however, AL was less effective than MPS alone in NHBD kidneys. TFP+AL together were completely ineffective in preserving renal function, regardless of whether the kidneys were from HBD or NHBD. CONCLUSIONS: MPS+TFP more effectively protected renal function against reperfusion injury in the NHBD than MPS alone, AL, or AL+TFP. AL exerts a salutary effect on creatinine clearance in HBD but not in the NHBD. The TFP and AL combination should not be used together with the MPS in machine preservation of kidneys.


Assuntos
Transplante de Rim/patologia , Transplante de Rim/fisiologia , Rim , Soluções para Preservação de Órgãos , Preservação de Órgãos/métodos , Circulação Renal/fisiologia , Traumatismo por Reperfusão/prevenção & controle , Adenosina , Alopurinol/farmacologia , Animais , Diurese/efeitos dos fármacos , Cães , Feminino , Glutationa , Parada Cardíaca , Insulina , Rim/efeitos dos fármacos , Rim/patologia , Rafinose , Circulação Renal/efeitos dos fármacos , Traumatismo por Reperfusão/patologia , Trifluoperazina/farmacologia
16.
Transplantation ; 65(5): 617-9, 1998 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-9521193

RESUMO

BACKGROUND: Use of tacrolimus (FK506), a potent immunosuppressive agent, has been reported to have a 10-20% incidence of insulin-dependent diabetes mellitus (IDDM) in adults, but the incidence of IDDM in pediatric renal transplant recipients treated with this agent is unknown. In this article, we report our single-center experience with FK506-induced IDDM in children. METHODS: Five consecutive living related donor pediatric renal transplants were reviewed retrospectively. RESULTS: All five patients developed IDDM lasting longer than 6 months. Mean follow-up time was 18.6 months. CONCLUSIONS: Pediatric patients may be at high risk for developing FK506-induced IDDM.


Assuntos
Diabetes Mellitus Tipo 1/induzido quimicamente , Transplante de Rim , Tacrolimo/efeitos adversos , Adolescente , Criança , Relação Dose-Resposta a Droga , Humanos
17.
Transplantation ; 68(12): 1910-1, 1999 Dec 27.
Artigo em Inglês | MEDLINE | ID: mdl-10628773

RESUMO

BACKGROUND: Notwithstanding the widely acknowledged organ-donor shortage coupled with the expanded waiting list for organs, many transplant programs have been reluctant to use kidneys from nonheartbeating donors. Some reasons expressed by those programs include a higher rate of delayed graft function, additional dialysis requirements, more medication usage, and inferior graft survival rates. To refute the common misperceptions, we reviewed our 4-year experience with 31 nonheartbeating donor kidneys recovered from uncontrolled donors (Maashticht classification) at our institution. METHODS: After cardiac arrest and declaration of death, all donors underwent intravascular and intraperitoneal cooling. Immediately after bilateral en bloc nephrectomy, kidneys were placed on the Waters MOX pulsatile preservation machine. Preservation parameters were monitored hourly, using pharmacologic agents (Stelazine, dexamethasone, Humulin R) as indicated by those parameters. RESULTS: The nonheartbeating donors ranged in age from 15 to 53 years, 83% were males, and 60% of deaths were caused by trauma. For the 21 recovered and transplanted at our center, delayed graft function occurred with 16 kidneys; there was no primary nonfunction. There was no obvious correlation between functional status and donor age. It was noted that the immediate-function kidneys had shorter warm ischemia and total preservation times compared with the delayed graft function group. Nineteen of the 21 grafts continue to function. All patients are surviving. CONCLUSIONS: This series suggests that to obtain excellent results with nonheartbeating donor kidneys certain principles should be followed: use machine preservation to resuscitate and evaluate viability, choose immunologically low-risk recipients, avoid immediate exposure to immunophilin antagonists, and perform biopsy frequently for allograft dysfunction to exclude low-grade rejection.


Assuntos
Sobrevivência de Enxerto , Transplante de Rim , Adolescente , Adulto , Cadáver , Feminino , Rejeição de Enxerto/etiologia , Humanos , Terapia de Imunossupressão , Rim/fisiopatologia , Masculino , Pessoa de Meia-Idade , Preservação de Órgãos , Cooperação do Paciente , Complicações Pós-Operatórias , Fatores de Tempo , Resultado do Tratamento
18.
Transplantation ; 71(1): 152-4, 2001 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-11211183

RESUMO

BACKGROUND: We have previously shown that our patient population of 60% minority races has end-stage renal disease primarily as a result of diabetes mellitus and hypertension. It therefore was logical to explore the restoration of normal insulin production and renal function by simultaneous pancreas-kidney (SPK) transplantation, without regard to race. This study represents new analyses integrating race with C-peptide status and reports the outcome of 136 SPK transplantations performed over the last 10 years. RESULTS: Of the 49 African-Americans with diabetes mellitus and end-stage renal disease, 60% were type I and 40% were type II, based on C-peptide levels. In comparison, only 16% of Caucasians were type II. The average age at onset of diabetes mellitus was 15.7 years for type I compared with 20.7 years for type II (P>0.05). The actuarial 10-year survival rates for the 136 SPKs were 91.79% (patient), 85.07% (pancreas), and 83.58% (kidney). The type I and type II survival rates were similar in the two diabetic groups. CONCLUSIONS: The data strongly suggest that pretransplant C-peptide status does not influence the outcome of SPK transplantation in patients with renal failure from diabetes mellitus. SPK transplants should be offered to all suitable diabetic patients with renal failure regardless of C-peptide status or race.


Assuntos
População Negra , Peptídeo C/metabolismo , Transplante de Rim/imunologia , Transplante de Pâncreas/imunologia , Diabetes Mellitus Tipo 1/cirurgia , Seguimentos , Sobrevivência de Enxerto/fisiologia , Humanos , Falência Renal Crônica/cirurgia , Fatores de Tempo
19.
Transplantation ; 64(11): 1607-9, 1997 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-9415567

RESUMO

BACKGROUND: We report the first documented case of pulmonary toxicity to mycophenolate mofetil in this article. METHODS: A 51-year-old woman experienced systemic reactions beginning 10 days after cadaveric renal transplantation. RESULTS: Recurrent respiratory failure and documented progressive pulmonary fibrosis ensued. Cultures were negative and other agents were discontinued. It was not until the mycophenolate was stopped did the patient improve. CONCLUSIONS: Mycophenolate mofetil can cause acute respiratory failure simulating opportunistic infection or pulmonary edema. If not recognized, this may lead to the rapid development of severe pulmonary fibrosis, some of which may not be reversible.


Assuntos
Imunossupressores/efeitos adversos , Ácido Micofenólico/análogos & derivados , Fibrose Pulmonar/induzido quimicamente , Insuficiência Respiratória/induzido quimicamente , Biópsia , Broncoscopia , Feminino , Humanos , Pulmão/patologia , Pessoa de Meia-Idade , Ácido Micofenólico/efeitos adversos , Fibrose Pulmonar/patologia , Insuficiência Respiratória/patologia
20.
Transplantation ; 66(12): 1694-7, 1998 Dec 27.
Artigo em Inglês | MEDLINE | ID: mdl-9884261

RESUMO

BACKGROUND: Recipient hepatitis C virus (HCV) seropositivity has been associated with inferior outcomes in renal transplantation (RTx). We sought to determine whether donor HCV+ status influenced the incidence of rejection, liver dysfunction, and graft survival in HCV+ recipients. METHODS: We reviewed 44 HCV+ recipients (R+) receiving RTx from HCV+ (D+) and HCV- (D-) donors between February 1991 and September 1996. All patients were followed to the end of the study period (mean=36 months, range=12-60 months). We compared the R+ group with a demographically matched cohort of 44 HCV- recipients (R-). RESULTS: Of the 44 R+, 25 (57%) had a total of 48 rejection episodes. Among the 44 R-, 32 (73%) had 58 rejection episodes (P>0.1). Within the R+ group, 28 were D+/R+; of these 14 (50%) had 27 rejection episodes, whereas among the 16 D-/R+, 11 (68%) had 21 rejection episodes (P>0.3). Graft and patient survival was similar in both the groups (86.4% and 91%, respectively). Liver dysfunction was slightly increased in the R+ group (4/44 vs. 0/44, P>0.1), with one death due to liver failure in this group. CONCLUSION: Donor HCV+ status had no influence on outcomes in HCV+ recipients after kidney transplantation in the short term. The incidence of rejection, graft loss, and mortality was comparable between the D+/R+ and D-/R+ groups. Furthermore, rejection, graft loss, and death were identical in R+ and R-groups throughout the 5-year study period. We therefore conclude that HCV+ recipients can safely receive kidney transplants without concern about donor HCV status or fear of adverse events from their own HCV+ status.


Assuntos
Hepatite C/complicações , Transplante de Rim/efeitos adversos , Doadores de Tecidos , Adulto , Idoso , Feminino , Rejeição de Enxerto , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
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