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Biomedical subjects

A Acevedo

Publications and source records attributed to A Acevedo.

89 records · Page 5Linked to original sources
PubMed1977

Plasma-cell granuloma of the gingiva.

A case of plasma-cell granuloma of the attached gingiva has been presented. The lesion was pedunculated and, clinically, resembled a traumatic fibroma. The microscopic picture was that of plasma-cell granuloma. Serum electrophoresis and radiographs were normal. A diagnosis of plasma-cell granuloma confirms a benign lesion of the oral cavity which must not be confused with the plasmacytoma, a possible precursor to multiple myeloma. This case emphasized the need for biopsy of lesions in order to establish a diagnosis. Only by biopsy and histologic study can rare lesions be diagnosed and their incidence studied.

Diagnosis, Differential↗
PubMed1977

Amyloidosis associated with multiple myeloma.

Amyloidosis is a rare, fatal disease caused by deposition of a sulfated mucopolysaccharide in various tissues and organs. Seven to ten per cent of patients with multiple myeloma, a disease of abnormal myeloid cells, have associated amyloidosis. A case of amyloidosis associated with multiple myeloma is described and a differential diagnosis for oral amyloidosis is presented to familiarize the practitioner with this entity.

Amyloidosis↗
PubMedDate not supplied

Effect of cigarette smoking upon the finger circulation in normal and diabetic subjects.

The basal finger blood flow and the reaction to cigarette smoking was studied among diabetic patients with neuropathy and non-diabetic controls. Both the basal blood flow and the reaction to cigarette smoking were lower among diabetics. The diminution of the basal blood flow was believed to be secondary to the diabetic microangiopathy. The absence of vasoconstriction was attributed to a blockade of the neurologic mechanism involved. The site of the blockade remains open.

Diabetes Complications↗
PubMedDate not supplied

A species-conserved NK cell antigen receptor is a novel vimentin-like molecule.

The role of a novel, evolutionarily conserved function-associated molecule (FAM) in NK cell function has been examined in several species. This molecule has previously been shown to mediate NK and NK-like recognition functions in fish NCC and human NK cells. We now show that this molecule is distributed in those tissues that contain NK cells in mice and rats. Further, we show that this molecule functions as an antigen receptor on NK cells of these species. That is, monoclonal antibodies directed against this FAM inhibit NK cell cytotoxic function and trigger signal transduction pathways in each of the species. Finally, we present evidence that this putative antigen receptor is a vimentin-like molecule which functions to mediate all NK or NK-like recognition functions in a variety of species.

Animals↗
PubMedDate not supplied

A kinetic analysis of platelet monoamine oxidase activity in patients with panic attacks.

A kinetic analysis of platelet monoamine oxidase (MAO) was performed in 22 patients with panic disorder and 14 normal controls, using tyramine as a substrate. Patients and controls did not differ significantly for either Km or Vmax, when same sex contrasts were carried out. The results do not support some studies that have shown elevated MAO activity in patients with panic attacks. The reasons for the discrepancies between previous studies and the present one are explored.

Adult↗
PubMedDate not supplied

Effect of intra-arterial reserpine in patients suffering from Raynaud's phenomenon.

Several papers have established the beneficial effect of Reserpine applied intra-arterially in patients suffering from Raynaud's phenomenon. In the present study this effect was investigated in 15 patients, some of whom had been submitted previously to sympathectomy, and in healthy controls. A solution of 1.25 mg Reserpine in 10 ml normal saline was injected in the course of one minute in the brachial artery. Blood pressure, pulse rate, bilateral finger venous occlusion plethysmography and fingertip temperature measurements were carried out for two hours following the injection. Later, venous occlusion plethysmographic and clinical controls were continued weekly, until the Reserpine effect had ceased. Normal subjects, patients suffering from Raynaud's phenomenon undergoing no surgical treatment and those submitted to preganglionic sympathectomy showed a conspicuous increase in digital blood flow, while in one patient, who had stellectomy the fingerflow remained unchanged. This effect remained chiefly located on the injected side. There were no blood pressure or pulse rate changes while in the lying position. Hypotension by passive orthostasis was observed two hours after the injection. The possible mechanism of Reserpine is discussed.

Adult↗