Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0021051 (immunodeficiency)
 71,517 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Diarrheal disease and its associated morbidities occur frequently in patients infected with human immunodeficiency virus (HIV) and may be associated with a decreased quality of life. We studied the spectrum of symptoms, measures of nutritional status, and the enteric pathogens associated with diarrheal disease in a group of 24 patients infected with HIV in Bangkok, Thailand compared with a group of 19 patients infected with HIV without diarrhea cared for at the same clinic. Patients with diarrhea appeared to have more advanced disease by CD4 cell counts and complained more frequently of symptoms such as anorexia, gas, and bloating than patients without diarrhea. Patients with diarrhea had a tendency toward a lower nutritional status, as measured by body mass index and mid arm circumference. Stool culture and examination revealed that enteric pathogens including Salmonella species and Cryptosporidium parvum sporidia were recovered at equal frequencies in patients with and without diarrhea (27% of the patients with diarrhea and 25% of the patients without diarrhea). Microsporidia was identified in one patient with diarrhea. It was not possible to identify a pathogen in 73% of the patients with diarrhea and 75% of the patients without diarrhea, suggesting that additional agents or factors may be responsible for the diarrheal symptoms in the patients with diarrhea. More extensive studies to identify potentially treatable pathogens in HIV-infected patients with diarrhea in Thailand are warranted and further attempts to better define the syndrome of pathogen-negative diarrheal disease in patients infected with HIV might result in the development of more targeted interventions in these patients.
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PMID:Diarrheal disease in patients infected with human immunodeficiency virus in Bangkok, Thailand. 1034 68

Diarrhoea is a problem, not only of the developing world, but also of the Western world. However, the economic implications of diarrhoeal diseases are particularly evident in the poorer countries. The most common worldwide cause of diarrhoea is intestinal infection and infants, pre-school children, the elderly, and those with congenital or acquired immunodeficiency run a high risk of contracting such infections. Diarrhoeal disease can be classified into three major clinical syndromes: acute watery diarrhoea, bloody diarrhoea, and persistent diarrhoea. A number of different micro-organisms can cause infectious diarrhoea, depending on the clinical setting. The development of oral rehydration solution has provided a simple approach to rehydration and maintenance of hydration in patients with acute watery diarrhoea, and has been implemented worldwide under the auspices of the World Health Organization. However, rehydration does not treat the diarrhoea itself, which will persist until the infection resolves. Since the drugs currently used for the treatment of diarrhoea, such as the opiate agents and antibiotics, have limitations, the search continues for a drug that acts predominantly on secretory pathways without affecting gastrointestinal motility. Novel therapeutic approaches include 5-HT(2) and 5-HT(3) receptor antagonists, calcium-calmodulin antagonists, and sigma-receptor agonists. Another approach has concentrated on the antisecretory role of the neurotransmitter, enkephalin, and has resulted in the development of the enkephalinase inhibitor, racecadotril. This drug has true antisecretory activity, and has demonstrated good efficacy and tolerability in clinical trials.
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PMID:Diarrhoea: a significant worldwide problem. 1071 3

Diarrheal disease is a major cause of childhood morbidity and mortality worldwide. Chronic enteropathy with subsequent persistent diarrhea and associated vicious cycles of malnutrition, increased gut permeability and secondary immunodeficiency are particularly devastating in the childhood population. The major causes of chronic enteropathy differ significantly between developed countries and developing countries. In developed countries, infectious and postinfectious diarrhea as well as abnormalities in immune response including celiac disease, food-induced allergic enteropathy and idiopathic inflammatory bowel disease account for most cases of chronic enteropathy. In developing countries, syndromic persistent diarrhea associated with malnutrition and secondary immunodeficiency due to human immunodeficiency virus (HIV) infection predominate as the major causes of chronic enteropathy. These latter two causes account for a disproportionate share of the more than 2.5 million deaths of children under 5 years of age due to diarrhea each year worldwide. From a practical perspective, diagnostic evaluation of chronic enteropathy in developing countries is often limited to identifying potential causative enteropathogens and antimicrobial treatment. Proper management with an emphasis on fluid homeostasis and protocolized nutritional therapy and rehabilitation is essential to successful treatment of syndromic persistent diarrhea.
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PMID:Chronic enteropathy: clinical aspects. 1724 93

Recent studies into the global causes of severe diarrhoea in young children have identified the protozoan parasite Cryptosporidium as the second most important diarrhoeal pathogen after rotavirus. Diarrhoeal disease is estimated to be responsible for 10.5% of overall child mortality. Cryptosporidium is also an opportunistic pathogen in the contexts of human immunodeficiency virus (HIV)-caused AIDS and organ transplantation. There is no vaccine and only a single approved drug that provides no benefit for those in gravest danger: malnourished children and immunocompromised patients. Cryptosporidiosis drug and vaccine development is limited by the poor tractability of the parasite, which includes a lack of systems for continuous culture, facile animal models, and molecular genetic tools. Here we describe an experimental framework to genetically modify this important human pathogen. We established and optimized transfection of C. parvum sporozoites in tissue culture. To isolate stable transgenics we developed a mouse model that delivers sporozoites directly into the intestine, a Cryptosporidium clustered regularly interspaced short palindromic repeat (CRISPR)/Cas9 system, and in vivo selection for aminoglycoside resistance. We derived reporter parasites suitable for in vitro and in vivo drug screening, and we evaluated the basis of drug susceptibility by gene knockout. We anticipate that the ability to genetically engineer this parasite will be transformative for Cryptosporidium research. Genetic reporters will provide quantitative correlates for disease, cure and protection, and the role of parasite genes in these processes is now open to rigorous investigation.
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PMID:Genetic modification of the diarrhoeal pathogen Cryptosporidium parvum. 2623 14