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Biomedical subjects

V Arcocha

Publications and source records attributed to V Arcocha.

17 recordsLinked to original sources

Renal artery rupture secondary to pretransplantation Candida contamination of the graft in two different recipients.

Infected graft transplantation is an unwelcome complication that may lead to serious consequences in the immunosuppressed host. It can be caused by infection of the donor or by contamination of the organ during harvest, preservation and handling, or at transplantation. With current donor evaluation protocols, the risk of transmitting infections by exogenous contaminated grafts seems to be more frequent than true donor-transmitted infections. Nevertheless, although rare and usually free of clinically significant sequelae, if contamination is by some virulent organisms such as Staphylococcus aureus, gram-negative bacilli, or fungi, severe complications may occur. We report the clinical outcome of liver, heart, and kidney recipients from a single donor. Both renal allografts had to be removed because of renal artery rupture secondary to Candida albicans infection. Careful donor evaluation before transplantation, unusually early presentation of mycosis leading to anastomotic renal artery disruption, the histopathologic findings of the grafts, and the absence of Candida infection in the liver and heart recipients make us believe that exogenous contamination of the grafts occurred during donor procedure, kidney processing, or at transplantation. In summary, because infected grafts can lead to serious complications, besides careful donor screening, it is important to achieve early recognition of contaminated organs by culturing the perfusate to start specific antibiotic or antifungal therapy after transplantation if necessary and avoid the rare but, in this case, fatal consequences of these infections.

Adolescent↗

Secondary hyperparathyroidism exacerbation: a rare side-effect of interferon-alpha?

Recombinant human interferon alpha (alpha IFN) is the only treatment with proven benefit for chronic hepatitis C virus (HCV) infection. Nevertheless its use in some susceptible individuals has led to the development or aggravation of different autoimmune conditions. We report the case of a 20 year old woman on peritoneal dialysis with chronic lobular hepatitis secondary to HCV infection who developed de novo psoriasis 9 months after starting treatment with alpha-IFN. In addition to psoriasis, alpha-IFN prescription was also concurrent with an unexpected and refractory secondary hyperparathyroidism exacerbation initially characterized by a marked reduction of serum calcium levels and a consequential increase of PTH. Both complications disappeared after drug withdrawal. The clinical sequence makes an alpha-IFN-induced autoimmune side effect the most plausible hypothesis. The case is discussed and some possible etiopathogenic factors are briefly reviewed.

Adult↗

Voluntary ingestion of Cortinarius mushrooms leading to chronic interstitial nephritis.

'Magic mushrooms' ingestion among the drug-using population has become a popular cheap way to get hallucinogenic effects which is not free of complications. One of these is acute renal failure related to Cortinarius genus intake. This one greatly resembles 'magic mushrooms' and confusion is possible for inexperienced collectors. We report the case of a young male ex-drug addict who developed acute tubulointerstitial nephritis after voluntary ingestion of Cortinarius orellanus. The clinical picture was preceded by a long latency period, had an insidious course without any data of hepatoxicity and evolved to a chronic state. Renal biopsy showed nonspecific histopathological findings. In summary, it is important to bear this possibility in mind when facing an acute tubulointerstitial nephritis of unknown origin in a drug-taking patient.

Acute Kidney Injury↗

Direct effect of deferoxamine on hemoglobin synthesis in patients on hemodialysis treated with recombinant human erythropoietin.

We have studied the response of hemoglobin (Hb), hematocrit, reticulocytes, mean corpuscular volume, ferritin, serum iron, total iron-binding capacity (TIBC) and the transferrin saturation index in 9 patients on chronic hemodialysis (HD) with minimal aluminum overload who were treated with recombinant human erythropoietin (rHuEPO) when a single dose of deferoxamine (DFO; 40 mg/kg b.w.) was administered. Analytical determinations were performed basally and 48 h, 7 days and 14 days after a DFO test. Hb increased from a basal value of 10 +/- 0.28 to 10.7 +/- 0.33 (p < 0.05), 10.4 +/- 0.33 (p < 0.05) and 10.1 +/- 0.31 g/dl (NS), respectively, and similar increases were seen with the hematocrit. Serum iron increased from 52 +/- 7.62 to 89.2 +/- 14.48 (p < 0.01), 94 +/- 18.73 (p < 0.01) and 85 +/- 14.01 micrograms/dl (p < 0.01), respectively. TIBC and ferritin did not change but the transferrin saturation index increased significantly. DFO produces an immediate improvement of the anemia in HD patients treated with rHuEPO and who have minimal aluminium accumulation: it should be related to an increased iron availability to erythroid precursors either releasing stored iron or decreasing aluminum-bound transferrin.

Aged↗

Carnitine deficiency in haemodialysed patients.

Free carnitine, acylcarnitine and total carnitine concentrations have been determined in the sera of chronic renal insufficiency patients undergoing regular haemodialysis treatment and in those of healthy controls. The most striking difference was found to be the high proportion of acylated carnitine (23.4 mumol/l) in the haemodialysed patients. Free carnitine and acylcarnitine levels were not completely restored between successive dialysis treatments, making levels measured immediately before the third weekly sessions significantly lower than those measured before the first session (p less than 0.01). In patients monitored throughout 25 wk of treatment, there was an exponential decay of both total serum carnitine levels (Spearman's r = -0.993, p less than 0.001) and free carnitine levels (Spearman's r = -0.972, p less than 0.001). It is suggested that in the absence of exogenous supplies of carnitine, endogenous synthesis is unable to make up for losses due to dialysis treatment, and that carnitine deficiency consequently ensues.

Adolescent↗

Carnitine concentrations in dialysed and undialysed patients with chronic renal insufficiency.

Free carnitine, acylcarnitine and total carnitine serum concentrations have been measured in chronic renal insufficiency patients under conservative treatment, in patients under regular haemodialysis treatment and in healthy controls. In the undialysed patients the levels of free carnitine, acylcarnitine and total carnitine were all clearly higher than those of the control group. The free carnitine and total carnitine levels of undialysed subjects were also higher than in regularly haemodialysed patients, showing that dialysis produces plasma carnitine losses that are not compensated for by endogenous synthesis of carnitine (this finding supports published reports of tissue carnitine deficiency in patients undergoing regular haemodialysis). The acylcarnitine levels of dialysed and undialysed patients were not significantly different, however; both were very much higher than that of control group. The hypercarnitinaemia of the patients under conservative treatment suggests that the impairment of renal function causes a reduction in the elimination of carnitine via the kidney.

Adult↗