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5627. Topical vitamin-A-acid therapy for cutaneous metastatic melanoma.
Two patients with cutaneous metastatic melanoma were treated with a topical retinoid, beta-all-trans-retinoic acid. Complete regression of the treated lesions was noted in one patient and a partial response was seen in the other patient. The mechanism of anti-tumour action of the retinoids is not completely known but binding to intracytoplasmic receptors with promotion of cellular differentiation, alteration of membranes, and immunological adjuvant effects may be involved.
5632. Growth-stimulating factor in regenerating canine liver.
作者: T E Starzl.;A F Jones.;J Terblanche.;S Usui.;K A Porter.;G Mazzoni.
来源: Lancet. 1979年1卷8108期127-30页
Extracts from dog livers which had been regenerating for 24, 48, and 72 h after hepatectomy were infused for 6 h into the left portal vein of animals which had fresh portacaval shunts (Eck fistula) and which were killed 2 and 3 days later. The brief exposure to the 48-h and especially the 72-h regenerating liver extracts induced a delayed proliferative response predominantly in the left liver lobes, with a slight spillover effect to the right liver lobes but none to the kidney. The response reached its peak 3 days later. In the left but not the right liver lobes, both the 48-h and the 72-h regenerating liver extract reversed the atrophy ordinarily caused by Eck fistula in 3 days and partly prevented the ultrastructural hepatocyte deterioration characteristic of Eck fistula. The active liver extracts apparently contained a growth-control factor or factors which is (are) not insulin or glucagon.
5634. Asymptomatic endemic rotavirus infections in the newborn.
Between May 1, 1976, and May 14, 1977, 343 (32.5%) of 1056 5-day-old babies in newborn nurseries excreted rotaviruses. The infection-rate was highest during winter (49%). 76% of infected babies at this time were bottle-fed. 41% of neonates excreted low amounts of virus (less than or equal to 10(8) particles/g faeces); older children tended to excrete greater than 10(10) particles/g faeces. Infected breast-fed babies excreted less virus than those who were bottle-fed. Stools of breast-fed babies often contained clumps of complete "smooth" rotavirus particles. When the newborn nurseries were transferred to a newly built hospital wing, infection appeared in the new wards, including those admitting only new patients, within a short period. Infection was either mild (8%) or symptomless (92%), and even babies with symptoms required no treatment.
5635. Altered theophylline pharmacokinetics during acute respiratory viral illness.
The plasma half-life of theophylline was determined during and 1 month after serologically confirmed upper-respiratory-tract viral illness in six children with chronic asthma. In this group the plasma-theophylline half-life (mean = 419.8 min) was significantly longer during the acute stage of their illness than 1 month later (mean 249.9 min). There was no appreciable change in half-life in 4 patients who were febrile but in whom seroconversion did not occur. These preliminary results suggest that certain upper-respiratory-tract viral infections may affect theophylline metabolism.
5637. Rotavirus infections of neonates.
Faecal specimens from 628 newborn babies in the nurseries of six metropolitan hospitals were examined by electron microscopy for rotaviruses. 304 babies (49%) were found to be excreting virus. All those infected were in five nurseries; viruses were not detected in specimens from the sixth nursery. Two nurseries were studied for 9 mo and another for 11 mo and rotaviruses were found consistently in 40-50% of stools examined. There was no seasonal variation. None of the neonates under the age of one day were infected but by the age of three to four days approximately 50% were excreting virus. Most of those shedding virus were symptom-free but 84 (28%) had diarrhoea. Persisting endemic rotavirus infection is apparently common in hospital nurseries in Sydney. The virus is probably transmitted by environmental spread from neonate to neonate.
5638. Raised urinary fibrin-degradation products, complement, and IgG during an influenza-like illness.
Urine from eight normal controls in whom an influenza-like illness developed contained high concentrations of fibrin-degradation products (F.D.P.), IgG, and C3. The study was carried out when influenza A was prevalent in the community. However, a wide range of serological investigations revealed no evidence for influenza A or other viruses. The infection may have been caused by other viruses which produce upper-respiratory-tract infections and which are not readily diagnosed by serology. Urinary fibrin-degradation products are a well-known marker of glomerulonephritic activity and viral antigens may have induced an immune-complex glomerulonephritis in the 8 controls in whom an influenza-like disease developed. A larger normal population should be investigated during a virus epidemic.
5639. Balkan (endemic) nephropathy and a toxin-producing strain of Penicillium verrucosum var cyclopium: An experimental model in rats.
作者: J M Barnes.;P K Austwick.;R L Carter.;F V Flynn.;G C Peristianis.;W N Aldridge.
来源: Lancet. 1977年1卷8013期671-5页
Cultures of an isolate of Penicillium verrucosum var. cyclopium, obtained from stored maize in an area of Balkan (endemic) nephropathy--Vratza, Bulgaria--has consistently induced renal tubular lesions when force-fed to rats for 20 days. The lesions, confined to the lower reaches of the proximal convoluted tublues (pars recta and junctional zone), closely resemble the tubular changes in patients with Balkan nephropathy. Preliminary evidence suggests that this nephrotoxin-producing strain of P. verrucosum var. cyclopium may be implicated in the aetiology of Balkan nephropathy.
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