scholarly journals THE EFFECTS OF BACTERIAL ENDOTOXIN ON LIPIDE METABOLISM

1959 ◽  
Vol 110 (2) ◽  
pp. 293-309 ◽  
Author(s):  
V. S. LeQuire ◽  
J. D. Hutcherson ◽  
R. L. Hamilton ◽  
M. E. Gray
Keyword(s):  
Total Serum ◽  
Initial Increase ◽  
Total Serum Cholesterol ◽  
Moderate Increase ◽  
Progressive Decrease ◽  
Thorium Dioxide ◽  
Metabolic Alterations ◽  
Intravenous Injections ◽  
Bacterial Endotoxins ◽  
Shwartzman Reaction

Single intravenous injections of Shear's polysaccharide in varying dosages invariably produced an elevation in the levels of the total serum lipides 24 hours after injection of endotoxin. The total serum cholesterol and lipide phosphorus were also affected, although they did not change with smaller doses of endotoxin and were rarely elevated to the same degree as were the total serum lipides. The degree of elevation of the serum lipides was apparently related to the amount of endotoxin injected up to a certain point, beyond which there was no further increase. There were two types of response to endotoxin by the serum lipides, a moderate increase and an uncontrolled increase. Higher dosages of endotoxin and fasting apparently increased the incidence of the latter response. No direct correlation could be made between serum lipide responses and histologic evidence typical of the generalized Shwartzman reaction following this regimen of endotoxin injection. The Shwartzman reaction did occur with greater frequency and with lower dosages of endotoxin in fasted animals. Animals given repeated injections of endotoxin showed an initial increase in serum lipides followed by a progressive decrease to normal levels as tolerance to the febrile action of endotoxin appeared. The febrile tolerance as well as the unresponsiveness of the serum lipides to endotoxin was abolished by thorium dioxide (thorotrast) in these animals. In similar experiments a "breakthrough" of lipide unresponsiveness to endotoxin was obtained by increasing the amount of endotoxin injected. Some of the implications of these results for the metabolic alterations produced by bacterial endotoxins are discussed.

scholarly journals THE PREVENTION OF THE GENERALIZED SHWARTZMAN REACTION WITH SODIUM WARFARIN

1958 ◽  
Vol 107 (3) ◽  
pp. 377-381 ◽  
Author(s):  
Sandor S. Shapiro ◽  
Donald G. McKay
Keyword(s):  
Disseminated Intravascular Coagulation ◽  
Control Group ◽  
Cortical Necrosis ◽  
Renal Cortical Necrosis ◽  
Intravascular Coagulation ◽  
Intravenous Injections ◽  
Bacterial Endotoxins ◽  
Shwartzman Reaction ◽  
Kidney Liver ◽  
Intravenous Sodium

Using intravenous sodium warfarin, rabbits were rendered hypoprothrombinemic and subjected to two intravenous injections of Shear's polysaccharide. None of the 9 animals surviving the required period of time developed bilateral renal cortical necrosis or histologic thrombi in the kidney, liver, spleen, or lungs. In a control group of 7 animals treated only with endotoxin, 6 developed bilateral renal cortical necrosis. It is concluded that the prothrombin complex is necessary for the production of the generalized Shwartzman reaction by bacterial endotoxins and that this phenomenon is essentially a process of disseminated intravascular coagulation.

scholarly journals HOST-PARASITE FACTORS IN GROUP A STREPTOCOCCAL INFECTIONS

1960 ◽  
Vol 111 (2) ◽  
pp. 255-284 ◽  
Author(s):  
Dennis W. Watson
Keyword(s):  
Scarlet Fever ◽  
Intravenous Injections ◽  
Streptolysin O ◽  
Bacterial Endotoxins ◽  
Group A ◽  
Shwartzman Reaction ◽  
Host Parasite ◽  
Parasite Factors ◽  
Pyrogenic Activity

The factors present in streptococcal lesion extracts (SLE) which enhanced the lethal and tissue-damaging properties of Gram-negative bacterial endotoxins and streptolysin O were identified with the scarlet fever group of toxins. Toxic manifestations attributed to this group of toxins included lethality, cardiotoxic and other tissue damage, enhancement of toxicity, and pyrogenicity. Of these, the measurement of febrile response in American Dutch rabbits was the most useful parameter of toxicity. In rabbits, repeated daily intravenous injections of 0.125 Lf of a purified erythrogenic toxin immunizes specifically against the pyrogenic activity; this technique was used to type the toxins and to distinguish them from exogenous and endogenous pyrogens; non-specific pyrogens, such as streptococcal endotoxin, were not found in SLE. All types of the Lancefield Group A streptococci tested produced one or or more immunologically distinct toxins in vivo in contrast to Groups B and C which did not produce them; toxins A and B, previously distinguished by neutralization of rash-inducing activity in the skin, were produced in vivo. The A toxin was the most common, as indicated by its presence in extracts prepared with Types 28, 12, 17, and 10 (NY-5); B toxin was found in 10 (NY-5) and 19. A new toxin, designated C, was obtained from a Type 18. In American Dutch rabbits, purified toxin at a concentration of 15 Lf (900,000 STD) neither gave a Dick test nor prepared the skin for the local Shwartzman reaction; by this route, however, in contrast to classical endotoxins, they enhance the lethal and tissue-damaging properties of sublethal doses of these and other toxins. These properties of the immunologic distinct exotoxins as demonstrated in American Dutch rabbits suggest by analogy their importance in the pathogenesis of streptococcal disease in man. Evidence that might implicate them in sequelae, in addition to scarlet fever, is discussed.

Liquoid Induced Stasis and the Generalized Shwartzman Reaction

1979 ◽  
Vol 41 (04) ◽  
pp. 804-810 ◽  
Author(s):  
Knut Nordstoga
Keyword(s):  
Red Cells ◽  
Renal Lesions ◽  
Intravenous Injections ◽  
Shwartzman Reaction ◽  
Glomerular Capillaries

SummaryThe composition of the occlusive material within dilated glomerular capillaries, following intravenous injections of Liquoid in blue foxes, was studied electron microscopically; it was found that it mainly consisted of a debris in which disintegrated red cells constituted the major component. Damaged platelets and necrotic endothelial remnants were other components. These observations were interpreted as a result of glomerular stasis, and it was concluded that stasis in glomerular capillaries is a basic event in the development of the renal lesions accompanying the generalized Shwartzman reaction.

scholarly journals Lipolytic Postbiotic from Lactobacillus paracasei Manages Metabolic Syndrome in Albino Wistar Rats

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 472
Author(s):  
Ali Osman ◽  
Nashwa El-Gazzar ◽  
Taghreed N. Almanaa ◽  
Abdalla El-Hadary ◽  
Mahmoud Sitohy
Keyword(s):  
Metabolic Syndrome ◽  
Lipid Metabolism ◽  
Lipolytic Activity ◽  
Control Level ◽  
Serum Triglyceride ◽  
Positive Control ◽  
Lactobacillus Paracasei ◽  
Total Serum ◽  
Albino Rats ◽  
Total Serum Cholesterol

The current study investigates the capacity of a lipolytic Lactobacillus paracasei postbiotic as a possible regulator for lipid metabolism by targeting metabolic syndrome as a possibly safer anti-obesity and Anti-dyslipidemia agent replacing atorvastatin (ATOR) and other drugs with proven or suspected health hazards. The high DPPH (1,1-diphenyl-2-picrylhydrazyl) and ABTS [2,2′-azino-bis (3-ethyl benzothiazoline-6-sulphonic acid)] scavenging activity and high activities of antioxidant enzyme such as superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-px) of the Lactobacillus paracasei postbiotic (cell-free extract), coupled with considerable lipolytic activity, may support its action against metabolic syndrome. Lactobacillus paracasei isolate was obtained from an Egyptian cheese sample, identified and used for preparing the postbiotic. The postbiotic was characterized and administered to high-fat diet (HFD) albino rats (100 and 200 mg kg−1) for nine weeks, as compared to atorvastatin (ATOR; 10 mg kg−1). The postbiotic could correct the disruption in lipid metabolism and antioxidant enzymes in HFD rats more effectively than ATOR. The two levels of the postbiotic (100 and 200 mg kg−1) reduced total serum lipids by 29% and 34% and serum triglyceride by 32–45% of the positive control level, compared to only 25% and 35% in ATOR’s case, respectively. Both ATOR and the postbiotic (200 mg kg−1) equally decreased total serum cholesterol by about 40% and 39%, while equally raising HDL levels by 28% and 30% of the positive control. The postbiotic counteracted HFD-induced body weight increases more effectively than ATOR without affecting liver and kidney functions or liver histopathology, at the optimal dose of each. The postbiotic is a safer substitute for ATOR in treating metabolic syndrome.

scholarly journals Urinary Bisphenol A and Hypertension in a Multiethnic Sample of US Adults

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Anoop Shankar ◽  
Srinivas Teppala
Keyword(s):  
Diabetes Mellitus ◽  
Bisphenol A ◽  
Animal Studies ◽  
Smoking Status ◽  
Human Study ◽  
Positive Association ◽  
Total Serum ◽  
Total Serum Cholesterol ◽  
Race Ethnicity ◽  
Traditional Risk Factors

Background. Bisphenol A (BPA) is a common chemical used in the manufacture of polycarbonate plastics and epoxy resins, with >93% of US adults having detectable BPA levels in urine. Recent animal studies have suggested that BPA exposure may have a role in several mechanisms involved in the development of hypertension, including weight gain, insulin resistance, thyroid dysfunction, endothelial dysfunction, and oxidative stress. However, no previous human study has examined the association between markers of BPA exposure and hypertension.Methods. We examined urinary BPA levels in 1380 subjects from the National Health and Nutritional Examination Survey 2003-2004. Main outcome-of-interest was hypertension, defined as blood pressure-reducing medication use and/or blood pressures >140/90 mm of Hg (n=580).Results. We observed a positive association between increasing levels of urinary BPA and hypertension independent of confounding factors such as age, gender, race/ethnicity, smoking, body mass index (BMI), diabetes mellitus and total serum cholesterol levels. Compared to tertile 1 (referent), the multivariate-adjusted odds ratio (95% confidence interval) of hypertension associated with tertile 3 was 1.50 (1.12−2.00);P-trend = 0.007. The association was consistently present in subgroup analyses by race/ethnicity, smoking status, BMI, and diabetes mellitus.Conclusions. Urinary BPA levels are associated with hypertension, independent of traditional risk factors.

Influence of short-term dexfenfluramine therapy on glucose and lipid metabolism in obese non-diabetic patients

1993 ◽  
Vol 128 (3) ◽  
pp. 251-258 ◽  
Author(s):  
Per H Andersen ◽  
Bjørn Richelsen ◽  
Jens Bak ◽  
Ole Schmitz ◽  
Niels S Sørensen ◽  
...  
Keyword(s):  
Lipid Metabolism ◽  
Serum Insulin ◽  
Whole Body ◽  
Glucose Disposal ◽  
Total Serum ◽  
Total Serum Cholesterol ◽  
Diabetic Patients ◽  
Obese Patients ◽  
Short Term ◽  
Glucose And Lipid Metabolism

In a short-term (eight days) double-blind crossover study involving 10 obese patients, the effects of dexfenfluramine on glucose and lipid metabolism were examined. The protocol comprised whole body in vivo measurements (hyperinsulinemic euglycemic clamp in combination with indirect calorimetry) and in vitro studies of isolated adipocytes (lipolysis and glucose transport). All study participants were weight stable during the study period (103.1±3.2, placebo vs 103.3±3.1 kg, dexfenfluramine, NS). The following parameters were significantly reduced after dexfenfluramine treatment: fasting levels of plasma glucose (6.2±0.2 vs 5.7±0.2 mmol/l, p<0.01), serum insulin (168.0±14.5 vs 138.9±7.9 pmol/l, p<0.05), serum C-peptide (0.68±0.03 vs 0.58±0.02 nmol/l, p<0.05) and total serum cholesterol (6.07±0.41 vs 5.48±0.38 mmol/l, p< 0.01). In the basal state glucose oxidation rate was significantly reduced by 36% (p<0.001), whereas non-oxidative glucose disposal was significantly increased by 41% (p<0.01), following dexfenfluramine treatment. Insulin-stimulated (2 mU·kg−1·min−1) glucose disposal rate tended to be increased (18%, p=0.10) after dexfenfluramine. In conclusion, dexfenfluramine possesses beneficial regulatory effects on glucose and lipid metabolism in non-diabetic obese patients, independently of weight loss.

scholarly journals SIMILARITY OF HOST RESPONSES ELICITED BY POLYSACCHARIDES OF ANIMAL AND PLANT ORIGIN AND BY BACTERIAL ENDOTOXINS

1957 ◽  
Vol 106 (1) ◽  
pp. 77-97 ◽  
Author(s):  
Maurice Landy ◽  
Murray J. Shear ◽  
Keyword(s):  
Host Responses ◽  
Mouse Tissue ◽  
Rabbit Skin ◽  
Biological Phenomena ◽  
Hemorrhagic Necrosis ◽  
Bacterial Endotoxins ◽  
Shwartzman Reaction ◽  
Sarcoma 37 ◽  
Kidney Liver ◽  
Plant Sources

Ten polysaccharides, isolated from various animal and plant sources, were selected for comparison with 2 bacterial polysaccharides, typical of Gram-negative endotoxins. The tissue sources were: mouse (kidney, liver, lung, stomach, Sarcoma 37, and Carcinoma 241-6); rabbit skin and chick embryo skin; and tangerine and Bryonia root. The bacterial endotoxins were those of S. typhosa and Serr. marcescens. Their relative potency was determined in inducing the following host effects: fever, tolerance to pyrogenic action, leucocytic changes, the Shwartzman reaction, damage to Sarcoma 37, dermal hemorrhagic-necrosis by epinephrine, enhancement of antibody production, and lethality. Some of the polysaccharides were consistently active in all the host reactions studied; except for pyrogenic activity at high dosage, the other polysaccharides were consistently negative throughout. The mouse tissue polysaccharides elicited all the effects studied; in some instances their potency approached those of the bacterial polysaccharides. It is pointed out that elicitation of the above array of biological phenomena, hitherto considered characteristic of bacterial endotoxins, can be obtained with polysaccharides from animal and plant tissues.

scholarly journals Functional Probiotic Assessment andIn VivoCholesterol-Lowering Efficacy ofWeissellasp. Associated with Arid Lands Living-Hosts

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Imene Fhoula ◽  
Amel Rehaiem ◽  
Afef Najjari ◽  
Donatella Usai ◽  
Abdellatif Boudabous ◽  
...  
Keyword(s):  
Cell Lines ◽  
Density Lipoprotein ◽  
Lipoprotein Cholesterol ◽  
Membrane Properties ◽  
Total Serum ◽  
Total Serum Cholesterol ◽  
High Cholesterol Diet ◽  
Carbohydrate Utilization ◽  
Acid And Bile Tolerance

The research and the selection of novel probiotic strains from novel niches are receiving increased attention on their proclaimed health benefits to both humans and animals. This study aimed to evaluate the functional properties ofWeissellastrains from arid land living-hosts and to select strains with cholesterol-lowering propertyin vitroandin vivo, for use as probiotics. They were assessed for acid and bile tolerance, antibiotic susceptibility, membrane properties, antibacterial activity, antiadhesive effect against pathogens to host cell lines, and cholesterol assimilationin vitro. Our results showed that the majority of strains revealed resistance to gastrointestinal conditions. All the strains were nonhemolytic and sensitive to most of the tested antibiotics. They also exhibited high rates of autoaggregation and some of them showed high coaggregation with selected pathogens and high adhesion ability to two different cell lines (Caco-2 and MIM/PPk). Particularly,W. halotoleransF99, from camel feces, presented a broad antibacterial spectrum against pathogens, reducedEnterococcus faecalisandEscherichia coliadhesion to Caco-2 cells, and was found to reduce,in vitro, the cholesterol level by 49 %. Moreover,W. halotoleransF99 was evaluated for the carbohydrate utilization as well as the serum lipid metabolism effect in Wistar rats fed a high-cholesterol diet.W. halotoleransF99 showed an interesting growth on different plant-derivative oligosaccharides as sole carbon sources. Compared with rats fed a high-fat (HF) diet withoutWeissellaadministration, total serum cholesterol, low-density lipoprotein cholesterol, and triglycerides levels were significantly (p<0.001) reduced inW. halotoleransF99-treated HF rats, with no significant change in high-density lipoprotein cholesterol HDL-C levels. On the basis of these results, this is the first study to report thatW. halotoleransF99, from camel feces, can be developed as cholesterol-reducing probiotic strain. Further studies may reveal their potential and possible biotechnological and probiotic applications.

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