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Query: UMLS:C0024530 (malaria)
 44,886 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Abnormal interactions between red blood cells (RBCs) and vascular endothelial cells (ECs) are crucial factors in causing vascular pathology in several diseases, including vaso-occlusive crises in sickle cell anemia and the development of vascular complications in diabetes mellitus and malaria. A mechanistic understanding of the specific nature of RBC-EC interactions and ensuing functional consequences can provide insights into the pathophysiology of RBC-related vascular disorders and a rational basis for developing novel therapies. This review discusses in vitro experimental models that are commonly used for investigating RBC-EC interactions, and current knowledge of the molecular mechanisms of RBC-EC adhesion and EC functions modulated by RBCs. Because blood flow-induced mechanical forces and convective mass transfer play significant roles in regulating vascular events, it is necessary to develop advanced dynamic experimental models for elucidating RBC-EC interactions under well-controlled, physiologically relevant mechanical environments.
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PMID:In vitro studies of erythrocyte-vascular endothelium interactions. 1475 21

This year's conference provided newer insights on the complications of antiretroviral therapy, as well as into the complications that arise from HIV infection itself. Many presentations at the conference centered around metabolic complications of therapy, including lipid abnormalities, diabetes, body composition changes, bone disorders, and cardiovascular disease. New data on complications of HIV infection itself were presented, including those on coinfections with hepatitis B, C, and herpes simplex viruses, malaria, and tuberculosis, as well as complications that are important during pregnancy. This article summarizes these presentations.
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PMID:Complications of HIV disease and antiretroviral therapy. Highlights of the 11th Conference on Retroviruses and Opportunistic Infections, February 8-11, 2004, San Francisco, California, USA. 1511 28

The G to A single nucleotide polymorphisms (SNPs), at position -376, -308 and -238 in the promoter of the tumor necrosis factor alpha (TNF) gene, have been independently correlated with numerous diseases. Alleles TNF(-376A) and TNF(-238A) are normally found throughout the world with very low frequencies. We investigated the frequency of these SNPs in Sicilian subjects hospitalized after traumatic brain injury and in three groups of subjects from northern Sardinia: healthy subjects and individuals with multiple sclerosis or ischemic stroke. While no significant difference was found between healthy and disease subjects, the frequency of TNF(-376A) and TNF(-238A) was elevated up to 10 times in Sardinia compared to Sicily and other populations throughout the world. These elevated frequencies may be the result of genetic drift or of selective pressure on TNF itself or on neighboring genes, including the HLA. Malaria, endemic to Sardinia until the end of the 1940s, and the bubonic plague, are among the possible causes of selection. These findings indicate that Sardinia is an ideal location to further elucidate the correlation between TNF or HLA polymorphisms and diseases, including multiple sclerosis and type-I diabetes, present with an unusually high frequency and co-morbidity in Sardinia.
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PMID:High frequency of TNF alleles -238A and -376A in individuals from northern Sardinia. 1514 31

We have previously reported that infection with Plasmodium yoelii, Plasmodium chabaudi, or injection of extracts from malaria-parasitized red blood cells induces hypoglycemia in normal mice and normalizes the hyperglycemia in streptozotocin (STZ)-diabetic mice. P yoelii glycosylphosphatidylinositols (GPIs) were extracted in chloroform:methanol:water (CMW) (10:10:3), purified by high-performance thin layer chromatography (HPTLC) and tested for their insulin-mimetic activities. The effects of P yoelii GPIs on blood glucose were investigated in insulin-resistant C57BL/ks-db/db diabetic mice. A single intravenous injection of GPIs (9 and 30 nmol/mouse) induced a significant dose-related decrease in blood glucose (P < .001), but insignificantly increased plasma insulin concentrations. A single oral dose of 2.7 micromol GPIs per db/db mouse significantly lowered blood glucose (P < .01). P yoelii GPIs in vitro (0.062 to 1 micromol/L) significantly stimulated lipogenesis in rat adipocytes in a dose-dependent manner both in the presence and absence of 10(-8) mol/L insulin (P < .01). P yoelii GPIs stimulated pyruvate dehydrogenase phosphatase (PDH-Pase) and inhibited both cyclic adenosine monophosphate (cAMP)-dependent protein kinase A and glucose-6-phosphatase (G6Pase). P yoelii GPIs had no effect on the activity of the gluconeogenic enzymes fructose-1,6-bisphosphatase (FBPase) and phosphoenolpyruvate carboxykinase (PEPCK). This is the first report of the hypoglycemic effect of P yoelii GPIs in murine models of type 2 diabetes. In conclusion, P yoelii GPIs demonstrated acute antidiabetic effects in db/db mice and in vitro. We suggest that P yoelii GPIs, when fully characterized, may provide structural information for the synthesis of new drugs for the management of diabetes.
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PMID:Improvement of glucose homeostasis in obese diabetic db/db mice given Plasmodium yoelii glycosylphosphatidylinositols. 1528 Oct 17

Renal failure remains a serious cause of mortality in Yemen. Our region has 1.25 million population and our hospital is the central hospital, which has a nephrology department and performs dialysis for the region. Between January 1998 and December 2002, we admitted 547 patients; including children, with acute renal failure (ARF) and chronic renal failure (CRF). CRF was observed in 400 patients, an incidence of 64 per million per year and a prevalence of 320 per million. ARF occurred in 147 persons with an incidence of 23.5 per million per year and a prevalence of 117.5 patients per million. Of all patients, 72% were adults (age range, 20-60 years) with a male preponderance. As a tropical country, malaria (27.9%), diarrhea (13.6%), and other infectious diseases were the main causes. Next most common were obstructive diseases causing CRF and ARF (26.8% and 12.9%, respectively), mainly urolithiasis, Schistosomiasis, and prostatic enlargement. However the cause of CRF in 57.5% of patients was unknown as most persons presented late with end-stage disease (64.7%), requiring immediate intervention. Other causes, such as hepatorenal syndrome, snake bite, diabetes mellitus, and hypertension, showed low occurrence rates. Patients presented to the hospital mostly in severe uremia and without a clear history of prior medications. The major findings were vomiting, acidosis, and hypertension with serum creatinine values ranging between 2.8-45 mg/dL (mean value, 13.4 mg/dL). Anemia was observed in 80.4% of CRF versus 62.6% of ARF patients. Hypertension prevalence was 65.5% among CRF patients, of whom 25% were in hypertensive crisis, whereas among ARF the prevalence was only 26.5%.
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PMID:Renal failure in Yemen. 1535 Apr 75

In order to competently advise people who are planning to travel abroad the doctor needs information both about the planned journey (the mode of travel, the itinerary, the time of the trip) and about possible preexisting health problems. The area where the traveller intends to stay determines the specific risk of endemic diseases such as malaria, dengue-fever, yellow-fever etc. The recommendations for prophylaxis of malaria and for the different vaccinations are constantly modified and can be attained from the internet. Pre-existing health hazards such as cardiovascular diseases, diabetes mellitus, HIV-infection need to be assessed. Special consideration should be taken for pregnant women. The traveller returning from an endemic malarious area who feels ill or is febrile is a medical emergency and must be assessed for the possibility of having malaria since nontreated malaria in non-immune people has a very high mortality rate. Diarrhea is a common problem but is rarely dangerous. Long standing or bloody diarrhea, however, calls for a thorough search for the responsible pathogen. Healthy return travellers do not need a check-up examination because there are virtually no consequences for treatment.
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PMID:[Travellers in medical practice]. 1577 39

CD36 is a multiligand receptor associated with a broad array of physiological processes and involved in markedly diverse disorders, including atherosclerosis, insulin resistance and diabetes, dyslipidemia, tumor angiogenesis, and host defense against Plasmodium falciparum. CD36 deficiency has proved to be common, particularly in ethnic groups such as African Americans and Asians. CD36 is commonly expressed on blasts in acute monocytic leukemia, megakaryoblastic leukemia, and erythroleukemia. The role of CD36 in sickle cell crises and cerebral malaria is debatable. As a receptor for thrombospondin 1, CD36 plays a role in the regulation of angiogenesis, which may be a therapeutic strategy for controlling the dissemination of malignant neoplasms. The future challenge will be to further understand the mechanisms by which CD36 affects these diverse functions and to design therapeutic strategies that can alter the course of the diseases.
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PMID:CD36: a multiligand molecule. 1579 May 50

There is no doubt about the extensive medical knowledge of Cervantes at his time and some biographers affirm that he was a physician. Probably, part of this knowledge was the legacy of his father, a barber and surgeon, that bequeathed to him several medical books. However, there is an almost absolute ignorance related to his ailments and the cause of his death. Apart from a possible malaria, some authors have diagnosed him liver cirrhosis and diabetes mellitus, taking in account the Cervantes's own testimony, with hydropsy and uncontrollable thirst as important findings. However, some others explanations like heart failure are possible and certain data suggest terminal renal failure as his last illness.
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PMID:[Miguel de Cervantes: medical knowledge, ailments, and death]. 1601 11

The IMAP/IAN family of AIG1-like GTPases is conserved among vertebrates and angiosperm plants and has been postulated to regulate apoptosis, particularly in context with diseases such as cancer, diabetes, and infections. The human genes were recently renamed as gimap for GTPase of the immunity associated protein (GIMAP) family. Here we extend this new nomenclature to the murine gimap gene family. All gimap genes of the mouse are clustered on chromosome 6B with eight functional members and one pseudogene. The mGIMAP proteins contain one GTP-binding site and display molecular masses between 33 and 38 kDa except for the very unusual 77 kDa mGIMAP8 protein, which is the first characterized protein containing three GTP-binding domains. Northern blot analysis revealed expression of mgimap8 predominantly in the thymus. The low expression level observed in the spleen was further suppressed by Plasmodium chabaudi malaria. Confocal laser scanning microscopy demonstrated localization of mGIMAP8 at ER, Golgi, and mitochondria. Overexpression of mGIMAP8 could significantly impair anisomycin-induced activation of caspase 3. Our data support the view that mGIMAP8 exerts an anti-apoptotic effect in the immune system and is involved in responses to infections.
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PMID:Malaria-suppressible expression of the anti-apoptotic triple GTPase mGIMAP8. 1608 18

Now, at the dawn of the third millennium, non-communicable diseases are sweeping the entire globe. There is an increasing trend in developing countries, where the demographic and socio-economic transition imposes more constraints on dealing with the double burden of infectious and non-infectious diseases in a poor environment, characterized by ill-health systems. It is predicted that, by 2020, non-communicable diseases will cause seven out of every ten deaths in developing countries. Among non-communicable diseases, special attention is devoted to cardiovascular disease, diabetes, cancer and chronic pulmonary disease. The burden of these conditions affects countries worldwide but with a growing trend in developing countries. Preventative strategies must take into account the growing trend of risk factors correlated to these diseases. In parallel, despite the success of vaccination programmes for polio and some childhood diseases, other diseases like AIDS, tuberculosis, malaria and dengue are still out of control in many regions of the globe. This paper is a brief review of recent literature dealing with communicable and non-communicable diseases in developing countries. It gives a global view of the main diseases and their impact on populations living in low- and middle-income nations.
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PMID:The double burden of communicable and non-communicable diseases in developing countries. 1627 15


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