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Biomedical subjects

A Salo

Publications and source records attributed to A Salo.

44 records · Page 3Linked to original sources
PubMed1989

Deletion 3q27----3qter in an infant with mild dysmorphism, parietal meningocele, and neonatal miliaria rubra-like lesions.

Deletion 3q27----3qter in an infant is described. A chromosomal abnormality was suspected because of minor facial dysmorphism and closed parietal meningocele. On the first day of life, a large exudative inflammation appeared on the skin of her back, which completely resolved after 1 week. Biopsy showed dilated sweat gland openings resembling miliaria rubra, which has not been previously reported in this age group. It is unclear if the skin change was due to the chromosomal abnormality. The meningocele was repaired at age 8 months. At age 20 months, slight neurodevelopmental delay was evident, the main features being hypertonicity and inability to walk without support. The patient has two healthy sisters, and prometaphase chromosome studies in both parents were normal. This infant represents the first example of del3q27----3qter and the first reported association of meningocele with an abnormality of chromosome 3.

Abnormalities, Multiple↗
PubMed1989

CGRP-immunoreactive sensory nerve fibers in the submandibular gland of the rat.

Indirect immunofluorescence technique was used to study the occurrence and distribution of CGRP immunoreactivity in the submandibular gland of normal rats and after unilateral sensory and sympathetic denervations. In normal rats, CGRP-immunoreactive nerve fibers and nerve trunks were seen around or in close contact with interlobular salivary ducts as well as around small blood vessels of the gland. Occasionally, CGRP-immunoreactive nerve fibers were also detected between or around the acini of the gland. The submandibular ganglia contained CGRP-immunoreactive nerve fibers, but the ganglion cells were not immunoreactive for CGRP. The trigeminal ganglion contained a population of CGRP-immunoreactive, mainly small sized ganglion cells and nerve fibers distributed throughout the ganglion. Unilateral electrocoagulation of the trigeminal nerve caused a significant reduction in the number of immunoreactive nerve fibers in the gland, although some fibers still were present in the ipsilateral glandular tissue. Unilateral superior cervical ganglionectomy caused no detectable effect on the number of CGRP-immunoreactive nerve fibers in the gland. The present results suggest that the rat submandibular gland contains CGRP-immunoreactive nerve fibers both around blood vessels and in glandular secretory elements. Denervation experiments support the view that the majority, but perhaps not all of them originate from the trigeminal ganglion.

Animals↗
PubMed1989

Calcitonin gene-related peptide (CGRP) in the regulation of salivary secretion.

The occurrence of calcitonin gene-related peptide (CGRP) in nerves in the submandibular gland was studied by using indirect immunofluorescence technique. The functional significance of CGRP was further evaluated by using an in vitro method for demonstration of protein and peroxidase secretion. CGRP-immunoreactive nerve fibers were observed mainly around large ducts and around blood vessels in the stromal part of submandibular gland. A moderate amount of CGRP-immunoreactivity were seen around the secretory acini as well. In vitro, CGRP increased significantly total protein and peroxidase secretion. SDS gel electrophoresis revealed 20 different protein bands both in normal and stimulated samples. After CGRP-stimulation 13 out of these 20 bands showed more intensive staining in this semi-quantitative analysis. The present results demonstrate that the secretory elements of the rat submandibular gland are innervated by CGRP-IR nerve fibers and that CGRP has a significant effect on protein secretion in vitro. Thus our results support the view that CGRP has a direct stimulatory effect on salivary secretion.

Animals↗
PubMed1978

Ultraviolet radiation--induced chromosomal abnormalities in fetal fibroblasts from New Zealand black mice.

Fibroblasts from New Zealand Black mouse fetuses manifest increased frequency of chromosomal breaks and interchanges after exposure to ultraviolet radiation when compared with cells from BABL/c fetuses. This chromosomal instability is similar to what has been reported in cells from patients with xeroderma pigmentosum and may be related to the chromosomally abnormal clones and malignancy previously reported in adult New Zealand Black mice.

Animals↗
PubMed1978

Agnogenic myeloid metaplasia: a clonal proliferation of hematopoietic stem cells with secondary myelofibrosis.

The glucose-6-phosphate dehydrogenase (G-6-PD) types and chromosomes of hematopoietic and other tissues were determined in a woman with agnogenic myeloid metaplasia. The patient was heterozygous at the X-linked G-6-PD locus so that both B and A isoenzymes were found in nonhematopoietic cells. In contrast, only one G-6-PD type was found in granulocytes, red cells, and platelets. She also had a distinctive chromosome abnormality in blood cells but not in other tissues. These results indicate that agnogenic myeloid metaplasia is a disorder of a pluripotent stem cell and provide strong evidence that it is of clonal origin. In contrast to blood cells, the patient's cultured marrow "fibroblasts" had normal chromosomes and both B and A G-6-PD types, suggesting that the marrow fibrosis is a secondary abnormality. Thus, at least in this case of agnogenic myeloid metaplasia, the hematopoietic cell proliferation appears to be clonal, and, by inference, possibly neoplastic, whereas the marrow fibrosis is probably not clonal, and therefore appears to be secondary.

Aged↗