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Biomedical subjects

W Taylor

Publications and source records attributed to W Taylor.

241 records · Page 14Linked to original sources
PubMedDate not supplied

Atherosclerotic disease of the middle cerebral artery.

Three hundred and fifty-two patients with atherosclerotic middle cerebral artery stenosis (MCAS, 53%) or occlusion (MCAO, 47%) have been systematically studied. The study involved all patients entered into the EC/IC Bypass Study with isolated MCA disease or a tandem lesion predominating in the MCA ipsilateral to the ischemic events (18 patients with a tandem lesion of greater magnitude in the internal carotid artery were not included). The Asian patients represented 58% of all Asians entered into the EC/IC Bypass Study, whereas the white patients represented 18% of all whites and the black patients 34% of all blacks. Isolated TIAs were less frequent in MCAO (12%) than in MCAS (34%). Warning TIAs before a stroke occurred in one third of the cases. Presentation with stroke or isolated TIA was not influenced by sex, age, level of MCA obstruction, collateral circulation nor associated carotid disease. In MCAS, no major difference in presentation was found between severe and moderate stenosis. Pure motor hemiparesis occurred in 15% and pure sensory stroke in 2% of the patients with stroke and 30% of the MCA territory infarcts were small and limited to the lenticulocapsular area, confirming that so-called lacunar infarcts may be due to large vessel disease. During follow-up (42 months) of 164 medically-treated patients, further cerebrovascular events (TIA and stroke) occurred in 11.7% of the patients per year. In MCAO the stroke rate was 10.1% per patient-year and the ipsilateral infarct rate was 7.1% per patient-year. In MCAS, the stroke rate was 9.5% per patient-year and the ipsilateral stroke rate was 7.8% per patient-year.(ABSTRACT TRUNCATED AT 250 WORDS)

Cerebral Arteries↗
PubMedDate not supplied

Naturally occurring scrapie in Southdown sheep.

The purpose of this study was to characterize naturally occurring scrapie in the Southdown breed of sheep. Experimental subjects included 4 Southdown ewes admitted to the University of Missouri, College of Veterinary Medicine Large Animal Clinic. All 4 sheep had signs compatible with clinical scrapie. Cerebrospinal fluid (CSF) cell counts ranged from a low of 1 nucleated cell/microL to high of 4 cells/microL with a median of 3 cells/microL. Cerebrospinal protein concentrations ranged from 26 to 78 mg/dL with a median of 53 mg/dL. Immunoassay of the CSF for the 14-3-3 protein yielded positive results in 3 of the 4 sheep. Sequencing of the prion protein (PrP) gene revealed that all 4 sheep were homozygous for glutamine at codon 171 and, hence, were of the QQ genotype. Histopathologic examination of brain stem tissue sections revealed intracytoplasmic neuronal vacuolation and mild spongiform changes in the gray matter neuropil in all 4 ewes. The diagnosis of scrapie was confirmed by immunohistochemical staining for the abnormal PrP Our results suggest that the genetics of scrapie susceptibility are probably similar in Suffolk and Southdown sheep. Positive immunoassay results for the 14-3-3 protein were observed in 3 of the 4 sheep.

14-3-3 Proteins↗
PubMedDate not supplied

Risk factors associated with the use of sex hormones.

World wide, millions of women have been exposed to potentially carcinogenic steroids in the form of oral contraceptives. Neoplastic liver disease has been associated with the use of such agents, but a direct causal relationship has not been proved. Oral contraceptives may protect against some diseases. Other female sex hormones used in therapeutics probably carry little hazard. Anabolic androgen use is also associated with neoplastic liver disease. Arguments are put forward for caution in the use of male and female sex hormones in man, particularly in regions where possible initiating agents (viruses, oncogenes) may be endemic.

Anabolic Agents↗
PubMedDate not supplied

Phase II study of human lymphoblastoid interferon in patients with advanced renal carcinoma.

Twenty-two patients with measurable metastatic renal carcinoma were treated with human alpha lymphoblastoid interferon (Wellferon) (3 million units/m2 of body surface area) im three times a week for 6 weeks; 21 were evaluable for response and toxicity. One patient had a partial regression of disease lasting 39 weeks and another had a minor response. Six patients had partial or minor response in one area but no change in the disease elsewhere (mixed response); they were classified as having stable disease. An additional seven patients had no change in measurable disease and in six the disease progressed. The tumor regressions by metastatic site were four of 14 patients, pulmonary; three of four, soft tissue; one of nine, bone (? soft tissue); none of three, mediastinal; none of four, renal; none of five, liver; and none of ten, other abdominal sites of tumor. The side effects were fever (101 degrees F-103 degrees F), chills, malaise, anorexia, minor (10%-20%) decrease in performance status, and weight loss. We concluded that interferon had some activity against metastatic renal carcinoma, although clinically useful responses were quite infrequent. While lung metastases appeared to be more responsive than those at other sites, careful examination of the data suggests that this simply reflects differences in the bulk of the metastatic disease. Smaller metastases appear more likely to respond than bulky metastases.

Adult↗