Conquest of deficiency diseases. 10. Other deficiency diseases.
Explore the source record for details and available documents.
SEARCH · Search PubMed
Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Explore the source record for details and available documents.
Deficiency of red cell and lymphocyte adenosine deaminase (ADA) was found in children suffering from congenital combined immunologic deficiency. The parents had ADA levels intermediate between patients and controls. Complete lack of ADA activity was not found in normal subjects or in patients with a variety of other immunologic deficiency diseases.
Explore the source record for details and available documents.
Four classes of agents capable of producing human illness have been identified: toxicity, heredity, infection and deficiency. The leading paradigm for the etiology and pathophysiology of ischemic heart disease in the 20th century was that of intoxication by too much of the wrong kind of dietary fat. This overemphasis on lipid metabolism persists because important data are neglected and because of inattention to details. For example, heart disease risk does not correlate with fat intake within nations in contrast to between nations. Also development of ischemic heart disease involves inter alia arterial spasm, cardiac rhythm, metabolism of connective tissue, glucose and homocysteine, plus paraoxonase activity and thrombus formation which generally are unaffected by dietary fat. Homocysteine thiolactone accumulates when homocysteine is high. This lactone specifically inhibits lysyl oxidase which depends on copper to catalyze cross linking of collagen and elastin in arteries and bone. The lactone is hydrolyzed by paraoxonase, activity of which can be decreased by copper deficiency. Just as cholesterol was an important focus for heart disease as intoxication, homocysteine can become an excellent focus for a paradigm shift to heart disease as deficiency because supplementation with several nutrients can alter homocysteine metabolism and decrease its plasma concentration. These supplements include betaine, copper, folate, pyridoxine and vitamin B-12. Opportunities for research on ischemic heart disease as deficiency disease are plentiful.
Hexosaminidase deficiency diseases or GM2-gangliosidoses were originally described as infantile encephalopathies. Recently, hexosaminidase deficiencies have been found with different phenotypes, including juvenile and adult encephalopathies, cerebellar ataxias, and motor neuron diseases. Individual cases have resembled Ramsey-Hunt syndrome, olivopontocerebellar ataxia, Friedreich ataxia, amyotrophic lateral sclerosis, Kugelberg-Welander disease, Fazio-Londe disease, and Charcot-Marie-Tooth disease. Tremor, dystonia, spastic paresis, and psychosis have been seen. Since few diagnosable causes for these system atrophies are known, these patients should be tested for hexosaminidase deficiency. These recessive disorders fit a multiple loci/multiple alleles genetic scheme, and a clinical genetic classification is presented.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Serum immunoglobulin E concentration was studied in normal children and adults, in 25 patients with isolated IgA deficiency, and in 44 patients with ataxia telangiectasia using a double antibody radioimmunoassay. The geometric mean IgE level of the normal adult population studied was 105 ng/ml, with a broad 95% interval (5-2045 ng/ml). Individuals with concentrations less than 15 ng/ml were considered to be IgE deficient. IgE deficiency, defined in this way, was observed in 7 of 73 normal adults and was not found to be associated with respiratory tract disease.80% (35 of 44) of patients with ataxia telangiectasia (AT) were IgE deficient, 66% were IgA deficient, and 57% had combined IgE and IgA deficiencies. Although 45% of the patients with AT had respiratory tract disease, there was no correlation found between IgE deficiency or combined IgE and IgA deficiency and respiratory tract disease in these patients.11 of 25 individuals with isolated IgA deficiency were also IgE deficient. All 11 patients with both IgA and IgE deficiency were uniformly asymptomatic. However, there was an extremely high incidence (71%) of respiratory tract disease in IgA-deficient individuals who were not IgE deficient. These data fail to support the concept of a protective role for IgE in respiratory tract immunity. The possible role of IgE in the pathogenesis of respiratory tract disease in IgA-deficient patients is discussed.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.