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Biomedical subjects

J P Nicholson

Publications and source records attributed to J P Nicholson.

25 records · Page 2Linked to original sources
PubMed1983

Cigarette smoking and renovascular hypertension.

A retrospective cohort study to investigate the association between smoking and renal artery stenosis compared 71 patients with documented renovascular hypertension and 308 age-matched control patients with essential hypertension. 94% (30/32) of men and 74% (29/39) of women with renal artery stenosis had smoked cigarettes compared with only 43% (64/150) of men and 41% (65/158) of women in the control group. This striking relation was true for both patients with fibromuscular disease (71% smokers; 15/21) and patients with atherosclerotic lesions (88% smokers; 44/50). All renal artery stenosis groups had significantly higher systolic and diastolic blood pressures than the relevant control group. When the groups were stratified according to blood pressure, there were significantly more smokers in the renal artery stenosis group at every level of blood pressure.

Diastole↗
PubMed1983

Pheochromocytoma and prazosin.

Prazosin was used to control the signs and symptoms of excessive alpha-adrenergic activity in four patients with pheochromocytomas. Long-term dosage requirements were predicted by the blood pressure response to a single 1-mg oral dose. However, surgical management of the pheochromocytomas was inadequate with prazosin alone, and intravenous phentolamine was required to suppress the pressor surges generated by the tumor during surgical manipulation and excision.

Adult↗
PubMedDate not supplied

Coacervate microspheres as carriers of recombinant adenoviruses.

The therapeutic utility of recombinant adenoviruses (rAds) is limited in part by difficulties in directing the viruses to specific sites and by the requirement for bolus administration, both of which limit the efficiency of target tissue infection. As a first step toward overcoming these limitations, rAds were encapsulated in coacervate microspheres comprised of gelatin and alginate followed by stabilization with calcium ions. Ultrastructural evaluation showed that the microspheres formed in this manner were 0.8-10 microM in diameter, with viruses evenly distributed. The microspheres achieved a sustained release of adenovirus with a nominal loss of bioactivity. The pattern of release and the total amount of virus released was modified by changes in microsphere formulation. Administration of the adenovirus-containing microspheres to human tumor nodules engrafted in mice showed that the viral transgene was transferred to the tumor cells. It is concluded that coacervate microspheres can be used to encapsulate bioactive rAd and release it in a time-dependent manner.

Adenoviridae↗