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Biomedical subjects

C Cavallotti

Publications and source records attributed to C Cavallotti.

At least 109 records · Page 6Linked to original sources
PubMed1981

Cholinergic nerves in the mesentery.

The cholinergic innervation of extravascular portions of rat mesentery was studied in normal as well as 6-hydroxydopamine (7 OHDA) sympathectomized animals. We observed the presence of a cholinergic innervation unaltered by 6 OHDA treatment in extra-vascular portions of mesentery. Cholinergic nerve fibers coming from paravascular nerves forms loop]-like structures that innervate the mesentery proper. Also the islands of adipocytes of mesentery seem to be provided with a cholinergic innervation. The findings are discussed.

Adipose Tissue↗
PubMed1981

Acetylcholinesterase containing nerve fibres in coronary circulation.

The cholinergic innervation of coronary arteries and veins has been studied in the human. Structures resembling cholinergic nerve fibres are localised at the level of the extraparenchymal branches of the coronary arteries, organised in the adventitial plexus. Neither the coronary veins nor the intraparenchymal blood vessels are provided with a cholinergic innervation. Those findings are discussed.

Acetylcholinesterase↗
PubMed1980

Beta adrenergic receptors in the parathyroid glands.

The location of beta-adrenoceptors in human parathyroid gland was studied using an immunohistochemical method. Frozen sections of human parathyroid glands, taken from surgical samples, were treated with (-)-alprenolol, washed and exposed to (-)-alprenolol antibodies conjugated with fluorescent dyes. The (-)-alprenolol was bound to the parathyroid principal cells and to the main blood vessels. On the contrary, adrenergic nerve fibres, demonstrated with formaldehyde fluorescence technique, were only located within the walls of main blood vessels. The findings are discussed.

Alprenolol↗
PubMed1980

Acetylcholinesterase-containing nerve fibers in the dura mater of guinea pig, mouse, and rat.

The cholinergic innervation of the dura mater in the guinea pig, mouse and rat has been investigated. The dura mater is provided with a cholinergic innervation. After short incubation times (4--6 hours) we found acetylcholinesterase (AChE)-containing nerve fibers in close relationship with the main meningeal blood vessels. After longer incubation times, AChE-containing nerve fibers appear also in the meningeal tissue proper. Chemical sympathectomy, performed with the neurotoxin 6-hydroxy-dopamine, does not seem to interfere with the pattern of the dural cholinergic innervation. The findings are discussed.

Acetylcholinesterase↗
PubMed1980

The cholinergic innervation of the aorta.

The cholinergic innervation of the aorta has been studied in some mammalian species. Cholinergic nerve fibers (CNF) are organized in the aorta of the rabbit, kid, lamb, and guinea pig in 2 plexuses. The plexuses of CNF consist of a superficial plexus localized in the adventitial layer and a deep one localized in the adventitial-medial transitional zone. Some CNF reach the outer layers of the media. In the aorta of the dog, mouse and rat CNF are organized in a single plexus localized in the adventitial layer. This nerve plexus is formed of CNF that for the most part are distributed to the vasa vasorum. The chemical sympathectomy don't alters the pattern of the cholinergic innervation of the aorta, indicating that stained CNF are parasympathetic in nature. The meaning of a cholinergic innervation of the aortic wall is discussed.

Animals↗
PubMed1979

Cholinergic nerves in blood vessels of the female reproductive system.

Cholinergic innervation of the blood vessels of the female reproductive system was investigated in human by the cholinesterase method. The following results were obtained: 1. The uterine and vaginal arteries are provided with a rich cholinergic innervation. 2. The ovarian, tubaric and ovarian-uterine artery are poorly innervated. 3. The ovarian and uterine vein are not provided with a cholinergic innervation.

Acetylcholinesterase↗
PubMed1979

Tests to localize free proteolytic enzymes in vivo by 14C-cysteine-aprotinin.

Aprotinin, a polyvalent protease inhibitor from bovine organs, has been labelled with 14C-cysteine in 6 M urea to produce a radioactive conjugate, without effect on the inhibitor activity. 138x10(3) dpm of radioactive product, containing 5 mg of protein (20.000 kal. inhibitor units) in 5 ml of Locke's solution were perfused in anesthetized rabbits via ascending aorta. Then the anesthetized rabbit was killed and specimens of some organs were admitted to autoradiographic analysis. Small intestine, ischiatic nerve and testis have been the most rich radiolabelled organs (+++). In kidney, stomach, large intestine, liver and eye the radiolabelled aprotinin was found in fair amounts (++); while in pancreas, spleen, spinal cord, brain, cava vein and aorta of rabbit the 14C-cysteine-Aprotinin was practically undetectable by autoradiography.

Animals↗
PubMed1978

Glucose-6-phosphate dehydrogenase in kidneys of lead-poisoned rats and adrenalectomized rats.

Glucose-6-phosphate dehydrogenase (G6PDH) activity, assayed biochemically, was significantly increased in kidney homogenates of lead-poisoned rats when compared with controls. Histochemically, G6PDH activity was greatly increased both in the distal tubules and the macula densa, but showed no significant changes in the proximal tubules. Biochemical assay of G6PDH in kidney homogenates of adrenalectomized rats was three times that in control animals. In this condition also, histochemical staining showed G6PDH activity to be increased in both macula densa and distal tubules. This demonstrates an increase in G6PHD in two completely different experimental conditions and suggests that the distal renal tubule in the rat might operate in functional unity with the macula densa.

Adrenalectomy↗
PubMed1977

Myosin-like microfilaments in the human normal and pathological testis.

The immunofluorescent staining of the human normal testis shows that both peritubular and tubular cells bind antimyosin-like antibodies. The same cells are provided with a large amount of microfilaments within the cytoplasm. The thin microfilaments observed by electron microscopy in various cells of the human testis likely correspond to the sites of immunofluorescent staining. In pathological specimens there can be observed a decrease in peritubular smooth muscle cells associated with a decrease in cytoplasmic microfilaments and in the immunofluorescent staining of some cells.

Cytoplasm↗
PubMed1977

The contractile nature of the tubular-like cells of the parietal layer of the Bowman's capsule in male mice. An immunochemical and ultrastructural study.

The tubule-like cells (TLC) of the parietal layer of the Bowman's capsule of the renal corpuscle in normal male mice are provided with bundles of thin microfilaments (50-70 A). Moreover, the ultrastructural observations demonstrated that similar thin filaments (50-70 A) are located in the flattened cells of the parietal layer of the Bowman's capsule and in the tubular cells. All the above cells bind antimyosin-like antibodies. Considering the correspondence between the immunochemical and ultrastructural findings, it is suggested that the microfilaments located in TLC contain a 'myosin-like' protein.

Animals↗
PubMed1977

[Adrenergic receptors in coronary arteries (author's transl)].

The relations between adrenergic nerve fibers and related receptors in the wall of the coronary arteries have been studied in man. On sections of these vessels morphological observations (H.E.) were carried out: histochemical staining of adrenergic mediators (Eranko reaction for norepinephrine, and Hillarp reaction for cathecolamines), and of beta-receptors by means of a beta-blocking fluorescent drug (pindolol-Visken LB 46). Our observations provide evidence of the presence of beta-receptors in the wall of the coronary arteries, but they are particularly concentrated in the periadventitial connective tissue, in the adventitia and in the intima-media transitional zone. Beta-adrenergic receptors are above all present in the most richly innervated part of the vascular wall, and are therefore in close rapport with adrenergic nerve fibers.

Adolescent↗