451
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[Analysis and prevention of road traffic fatalities in Sichuan Province]. HUA XI YI KE DA XUE XUE BAO = JOURNAL OF WEST CHINA UNIVERSITY OF MEDICAL SCIENCES = HUAXI YIKE DAXUE XUEBAO 1997; 28:442-4. [PMID: 10683965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
This is an epidemiological survey of the fatalities from road traffic accidents in Sichuan. All fatal accidents that occurred in Sichuan from January 1994 to December 1994 were analysed. The mortalities per million kilometers of vehicle travel, per 100,000 registered motor vehicles and per 100,000 resident population were 4.35, 42.41 and 3.92 respectively. These figures were compared with international death rates and those reported by other countries. The results showed that Sichuan had higher mortalities per million kilometers of vehicle travel and per 100,000 registered vehicles but lower mortality per 100,000 resident population, compared with some industrialized and rich develeping countries. The majority of the victims were males aged 21 to 40. Road traffic fatalities constituted the leading cause of all accident deaths. The cost of road accidents in Sichuan was estimated to be sixty million Yuan. Further strategies and methods to minimize the rate of such accidents have been suggested.
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452
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[Computer simulation of system controlling--application to designing of anti-shock resuscitation therapy for burn injured patient]. SHENG WU YI XUE GONG CHENG XUE ZA ZHI = JOURNAL OF BIOMEDICAL ENGINEERING = SHENGWU YIXUE GONGCHENGXUE ZAZHI 1997; 14:269-73. [PMID: 11326848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
The computer simulation of aim-controlling of changes in the circulative plasma volume, plasma protein concentration, hematocrit and electrolytes for five burn injured patients during their shock phase was carried out by using back-propagation algorithm of the simulation system. Based on the aim-controlling, the better resuscitation therapy protocol for the patient was given by computer. The clinical application in five cases of the burns showed that the new method helped us to make individualized clinical anti-shock resuscitation formula for the burn injured patient more reasonable.
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453
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[Application of gas chromatography to identification of Clostridium difficile]. Se Pu 1997; 15:216-8. [PMID: 15739360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
Abstract
With chromatograph produced in our country, the gas chromatograms of fatty acid metabolites of five strains of Clostridium difficile isolated from stool of patients with tumor and one strain for control were compared and analysed by using stainless steel chromatographic column, 15% modified polyethylene glycol stationary phase nitrogen carriergas 140 degrees C column temperature and 190 degrees C detector temperature. The chromatograms of the isolated strains and the control strain were found to be extremely similar. All of them were peaks of acetic, propionic, isobutyric, butyric, isovaleric, valeric, and isocaproic acid. In comparison, the peaks of acetic, butyric, and isocaproic acid were higher, those of the isobutyric and isovaleric acid were medium and those of propionic and valeric acid were lower. Moreover, a low, flat peak appeared at 14th minute and was similar to that of p-cresol reported by Berg et al. The results of our experiment revealed that gas chromatography may be used as a simple, quick method for the identification of Clostridium difficile.
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454
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[A clinical study of correlation between ablation depth and corneal subepithelial haze after photorefractive keratectomy]. [ZHONGHUA YAN KE ZA ZHI] CHINESE JOURNAL OF OPHTHALMOLOGY 1997; 33:204-6. [PMID: 10437037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
OBJECTIVE To assess the correlation between excimer laser ablation depth and corneal subepithelial haze in correction of myopia. METHODS The results of 31 cases (62 eyes) of myopic anisometropia on whose both eyes photorefractive keratectomy (PRK) was performed at the same time were analyzed. The bilateral eyes of each patient were divided into two groups: The lower myopic eyes (-9.13 +/- 3.53 D) were in the control group and the higher myopic eyes (-14.10 +/- 4.17 D) in the treatment group. The follow-up periods were 6 to 12 months (mean, 10 months). RESULTS There is significant difference (P < 0.05) in the haze between the two groups after PRK. CONCLUSION The higher the correction of myopia, the more dangerous the occurrence of the haze following PRK.
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455
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Changes in mononuclear phagocyte microtubules after endotoxin stimulation. II. Changes in microtubule composition. Am J Respir Cell Mol Biol 1997; 16:127-32. [PMID: 9032119 DOI: 10.1165/ajrcmb.16.2.9032119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Microtubules are integral components of the cytoskeleton of human cells and are composed of alpha- and beta-tubulin as well as a variable number of microtubule-associated proteins. In monocytes and macrophages, microtubules bind endotoxin and partly regulate endotoxin-induced inflammatory events such as cytokine production. Endotoxin causes a rapid alteration in monocyte microtubule stability. To characterize the effect of endotoxin on mononuclear phagocyte microtubule composition, Western blots and flow cytometry were performed on human monocytes and the monocyte/macrophage-like cell line THP-1. Compared to unstimulated monocytes, monocytes stimulated with endotoxin for 18 h had increased quantities of alpha-, beta-, and tyrosinated alpha-tubulin as well as microtubule-associated protein-2. PMA-differentiated THP-1 cells had increased levels of alpha-tubulin, beta-tubulin, microtubule-associated protein-5, microtubule-associated protein-2, and tau after endotoxin stimulation. These results indicate that endotoxin can alter mononuclear phagocyte microtubules by causing an increase in certain microtubule component proteins.
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456
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Changes in mononuclear phagocyte microtubules after endotoxin stimulation. I. Changes in microtubule stability. Am J Respir Cell Mol Biol 1997; 16:119-26. [PMID: 9032118 DOI: 10.1165/ajrcmb.16.2.9032118] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Microtubules are in a dynamic equilibrium of polymerization and depolymerization. In monocytes and macrophages, microtubules bind endotoxin and partly regulate inflammatory events such as cytokine production. To characterize the morphologic differences between alveolar macrophage and blood monocyte microtubules after LPS stimulation, cells were examined by immunofluorescent microscopy and laser confocal microscopy. Fresh monocytes contained an average of 26 microtubules per cell which significantly increased to 31 microtubules per cell following a 30-min exposure to LPS (P < 0.001). Using a nocodazole-based assay of microtubule dynamic instability, the half-life of fresh unstimulated human monocyte microtubules was approximately 18 s and extended to 26 s following a 30-min exposure to LPS. In vitro maturation of monocytes for 18 h increased microtubule stability but not number. Compared to monocytes, alveolar macrophage microtubules were longer, more numerous, and much more stable. These results suggest that alveolar macrophage microtubules are more numerous and stable than blood monocyte microtubules and that LPS causes an increase in monocyte microtubule number and stability.
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457
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Detection of IL-5 and IL-1 receptor antagonist in bronchoalveolar lavage fluid in acute eosinophilic pneumonia. J Allergy Clin Immunol 1996; 97:1366-74. [PMID: 8648034 DOI: 10.1016/s0091-6749(96)70206-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Acute eosinophilic pneumonia is an idiopathic cause of respiratory failure, characterized by very high numbers of alveolar eosinophils without significant blood eosinophilia. OBJECTIVE The purpose of this study was to determine which cytokines are associated with acute eosinophilic pneumonia. METHODS Soluble IL-1 type II receptor and the cytokines IL-1 beta, IL-1ra, IL-3, IL-5, granulocyte-macrophage colony-stimulating factor, and tumor necrosis factor-alpha were measured in serum and in bronchoalveolar lavage fluid from two patients with acute eosinophilic pneumonia during both acute and convalescent phases. RESULTS Compared with patients with adult respiratory distress syndrome, the patients with acute eosinophilic pneumonia had high bronchoalveolar lavage fluid levels of IL-5, IL-1ra, and soluble type II IL-1 receptor but not IL-1 beta, tumor necrosis factor-alpha, IL-3, or granulocyte-macrophage colony-stimulating factor. Bronchoalveolar lavage fluid levels of IL-5 and IL-1ra fell after resolution of symptoms. In the serum of patients with acute eosinophilic pneumonia, IL-5 was not detectable, and IL-1ra was initially high but fell after corticosteroid treatment. CONCLUSION Acute eosinophilic pneumonia is characterized by locally high levels of IL-5, IL-1ra, and soluble type II IL-1 receptor in the alveolar space.
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458
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Facial casting as a method to help identify severely disfigured corpses. J Forensic Sci 1996; 41:518-20. [PMID: 8656197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The authors apply a previously reported method for facial casting of severely disfigured corpses, which allowed a three-dimensional cast to be made. This method involved several stages: face restoration, casting by elastomer, then three-dimensional positive image building. This technique seems to be useful in all cases of severe disfiguration of the face, particularly by trauma.
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459
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The improved PAS-ELISA method for the diagnosis of the pathogen for banana mosaic heart rot disease. CHINESE JOURNAL OF BIOTECHNOLOGY 1996; 12:195-200. [PMID: 9093763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
As a fast and practical immunological test, ELISA has been widely applied both in research and diagnosis of plant viruses [1]. In its research utility, PAS-ELISA has been proven as an effective measure to obtain CMV-free micropropagated plantlets. In large-scale micropropagation of banana plantlets, we have been using it in our Quality Control Department to prepare CMV-free and/or TMV-free germplasm. From large-scale testing, we have found that component(s) in banana tissue can cause a nonspecific reaction which severely interferes with the diagnostic results, making the average optical density (OD490nm) value a much higher false positive, leading to an abnormally high percentage loss of the germplasm prepared. The procedure for preparation of the antigen extract from banana tissue has been modified to eliminate the false positive.
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460
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[Statistical analysis of 4,547 burn patients and the mortality in different periods]. ZHONGHUA ZHENG XING SHAO SHANG WAI KE ZA ZHI = ZHONGHUA ZHENG XING SHAO SHANG WAIKF [I.E. WAIKE] ZAZHI = CHINESE JOURNAL OF PLASTIC SURGERY AND BURNS 1995; 11:335-338. [PMID: 8697245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
4,547 burn patients from 1983-1993 were reviewed by analysing the general data, mortality, and the causes of the death, and the mortality of 606 burn patients in different periods from 1958 to 1993. The purpose was to present some statistical and epidemiological data. The results showed: The incidence of burn injury in children, whose ages were less than 5 years, reached 36.2%, and the causes of burn was mainly thermal injury. The total mortality was 3.2%, and the main cause of the death was burn wound sepsis. No significant difference in the relationship between the mortality and the burn wound area was observed in these burn patients. In different age groups, the size of III degree burn, which accounted for higher mortality, was much different. The incidence of burn wound sepsis, which was the main cause of mortality, was on the increase, as the analysis of 606 burn patients in four different periods from 1958-1963 showed. In regard to the cure rate, the improvement had not been obvious since 1983.
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461
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Abstract
The authors developed an original method for casting the face of putrefied corpses, which allowed a three-dimensional facial cast of an individual to be made. This method used several stages: face restoration by subcutaneous injections of specific materials, casting by elastomer, then three-dimensional positive image building. This technique enabled the person to be recognized and then identified, and seems to be useful in such difficult cases.
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462
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Copper deficiency alters isomyosin types and levels of laminin, fibronectin and cytochrome c oxidase subunits from rat hearts. Comp Biochem Physiol B Biochem Mol Biol 1995; 111:61-7. [PMID: 7749637 DOI: 10.1016/0305-0491(94)00226-k] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The relative amounts of cardiac proteins such as laminin, fibronectin, cytochrome c oxidase, and isomyosin types were studied by gel electrophoresis and Western blotting in control and copper-deficient Sprague-Dawley rats of both sexes fed their respective diets from weanling for 3 weeks. Isomyosin types appeared to shift from V1 to greater levels of V3 in copper deficient rats for both genders. Male copper deficient rats had increased cardiac levels of fibronectin, decreased laminin levels, cardiac hypertrophy and anemia. Both male and female rats fed copper-deficient diet had lower levels of cytochrome c oxidase (CCO) subunit IV, and low liver copper, and high heart-to-body weight ratios compared with their respective controls.
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463
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Decreased tobacco-glycoprotein-induced lymphocyte proliferation in vitro in pulmonary eosinophilic granuloma. Am J Respir Crit Care Med 1995; 151:145-50. [PMID: 7812544 DOI: 10.1164/ajrccm.151.1.7812544] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Pulmonary eosinophilic granuloma is a disorder caused by localized collections of proliferating histiocytes in the lung. Little is known about its etiology except that the majority (58 to 97%) of patients are current or ex-smokers, making the potential etiologic role of tobacco products an important area for research. Tobacco glycoprotein (TGP) is a potent immunostimulator that has been isolated from cigarette smoke. TGP-specific lymphocyte proliferation, and cytokine production in vitro, were measured in three patients with pulmonary eosinophilic granuloma in remission and in three closely matched normal subjects with similar smoking histories. One patient with eosinophilic granuloma of bone and a matched control subject were also studied. Peripheral blood mononuclear cells were cultured with TGP, the recall antigen streptokinase (SK), and the mitogen concanavalin A (Con A). All three of the patients with pulmonary eosinophilic granuloma exhibited significant decreases in lymphocyte stimulation to TGP, despite normal responses to SK and Con A. In contrast, the response of the patient with eosinophilic granuloma of bone was higher than her matched control. The mean responses of the patients with pulmonary eosinophilic granuloma to TGP was significantly lower than the mean of nondiseased smokers or of normal nonsmokers. Twenty-four-hour culture supernatants were collected and assayed for cytokine levels (IL-1, IL-2, and IL-6). TGP-stimulated IL-2 production was significantly lower in the patients with pulmonary eosinophilic granuloma than in the normal subjects, confirming the reduced T-cell proliferative response.(ABSTRACT TRUNCATED AT 250 WORDS)
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464
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Abstract
Two patients with advanced multiple myeloma were treated with oral low-dose cyclosporin A. one without other therapy and one in conjunction with chemotherapy to which the patient had been previously unresponsive. Both patients had objective laboratory and clinical responses. In the patient treated with cyclosporin A alone, decreasing serum IL-6 and beta-2-microglobulin levels fell as the clinical response evolved. Cyclosporin A deserves further evaluation in the therapy of multiple myeloma.
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465
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An experimental methodology for the study of postmortem changes in toxic concentrations of drugs, using secobarbital as an example. J Forensic Sci 1994; 39:1300-4. [PMID: 7964567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Postmortem changes in alcohol and drug concentrations are well known today. The authors used an HPLC assay of barbiturates in postmortem tissue, and developed a rat model in order to evidence postmortem changes in toxics concentrations. Postmortem changes in secobarbital concentrations were evidenced using a rat-secobarbital model. This work emphasizes the difficulty of postmortem toxicology, as concentrations found at the time of autopsy may be different from concentrations at the time of death.
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466
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Abstract
The synthesis and characteristics of a binuclear ligand N,N,N',N'-tetrakis (2'-benzimidazolyl methyl)-1,4-diethylene amino glycol ether (EGTB) and its series of coordination compounds containing copper(II), iron(III), and manganese(II) with and without exogenous bridging ligand which was imidazolate ion (Im-), bipyridine (bpy), or 1,10-phenanthroline (phen) are reported. Depending on the redox potentials by cyclic voltammetry, the coordination compounds can act as catalysts for the dismutation of superoxide radicals (O2-). The detection of the rate constant of the reaction of superoxide ion with nitroblue tetrazolium (NBT) which is inhibited by superoxide dismutase (SOD) and its model compounds of the EGTB system has been performed by a modified illumination method. The rate constants kQ of the catalytic dismutation have been obtained.
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467
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Abstract
Our laboratory previously noted an increase in thymocyte mitogenic activity in the urine of many elderly patients. The present study was performed to verify this finding and to determine if this activity was actually due to an increase in interleukin-1 (IL-1). IL-1 levels were measured in the urine of 33 healthy, ambulatory, elderly subjects (ages 83-95 years), using both a murine thymocyte bioassay, measuring activation by the incorporation of tritiated thymidine and an MTT dye reduction assay. There was a significant increase in urine IL-1 in 85% of elderly individuals. In the MTT dye reduction assay, mean elderly urine IL-1 levels were 0.88 U/ml, in comparison with a young control group (ages 23-37 years) in which urine IL-1 levels were very low (mean IL-1 < or = 0.05 U/ml). Urine levels of IL-1 beta were also measured by using a sensitive immunoassay (ELISA) and were found to be significantly increased in the elderly (mean = 57.4 pg/ml), compared to the young (mean = 2.5 pg/ml). In contrast, IL-2 levels in urine were very low, with no difference between the young and the elderly. Mean urine protein and creatinine levels did not differ significantly between young and old, and did not account for the increase in urine IL-1 levels. Although its immunologic significance is not yet understood, this striking increase in IL-1 is an unusual and interesting finding that merits further investigation.
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468
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Effects of low copper intake on dimethylhydrazine-induced colon cancer in rats. PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE. SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE (NEW YORK, N.Y.) 1992; 201:94-7. [PMID: 1528914 DOI: 10.3181/00379727-201-43485] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Rats fed low copper show a high incidence of dimethylhydrazine (DMH)-induced colon tumors compared with rats fed very high Cu. The difference could be due to Cu deficiency in the low group or to Cu toxicity in the high group. In the present study, rats fed low Cu (0.2 ppm) showed greater DMH-stimulated colon tumorigenesis than rats fed adequate Cu (8 ppm). Differences were seen in the number of rats developing tumors (5 of 11 vs 1 of 10), total tumors (7 vs 2), and average tumor mass (1.02 g vs 0.29 g). Low Cu intake did not cause any general DMH toxicity as assessed by body weight gain. To prevent Cu deficiency-induced mortality, low Cu feeding was begun in postweanling rats (weight, about 80 g) housed in groups of five to six, rather than individually. This limited the effects of low Cu feeding to only a moderate Cu deficiency based on several parameters, including three Cu antioxidant enzyme activities. Group-housed rats fed marginal Cu levels (2.5 ppm) showed normal Cu status, and DMH produced only one tumor in 10 rats. In conclusion, high DMH-induced colon tumorigenesis can be found in rats with low activities of Cu antioxidant enzymes.
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469
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Electrocardiographic activity and cardiac function in copper-restricted rats. PROCEEDINGS OF THE SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE. SOCIETY FOR EXPERIMENTAL BIOLOGY AND MEDICINE (NEW YORK, N.Y.) 1992; 200:78-84. [PMID: 1533287 DOI: 10.3181/00379727-200-43396] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The temporal sequence of events leading to cardiac dysfunction during copper restriction in the Long-Evans rat was studied over a 6-week period. Weanling rats were fed either copper-adequate (6 mg Cu/kg diet, n = 25) or copper-restricted (less than 1 mg Cu/kg diet, n = 25) diets for varying periods of time for up to 6 weeks. Beginning at 2 weeks after weaning and weekly thereafter, five rats from each diet were evaluated for cardiac function, and sacrificed, and indicators of copper deficiency were determined on several tissues. Electrocardiograms began showing indications of cardiac disease at Week 3 in the copper-restricted rats, at which time cardiac hypertrophy and other signs of copper deficiency were apparent. Greater QT intervals and QRS amplitudes were observed in copper-restricted rats at various weeks. Peak + and - dP/dt maxs did not differ by diet copper treatment for any of the time intervals studied, nor was any notable difference in developed left ventricular pressure apparent. Hematocrit and liver copper levels were decreased in copper-restricted rat hearts at all weeks. These results suggest that the onset of cardiac dysfunction in copper deficiency is rapid, with both dysfunction and hypertrophy apparent within 3 weeks after copper restriction and when liver copper levels have declined.
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470
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Copper deficiency in a genetically hypertensive cardiomyopathic rat: electrocardiogram, functional and ultrastructural aspects. J Nutr 1991; 121:1026-34. [PMID: 2051221 DOI: 10.1093/jn/121.7.1026] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The effect of copper deficiency on cardiac function and structure was studied in a strain of rats (SHHS/Mcc-cp) known to develop cardiac failure as adults. Restriction of dietary copper (less than or equal to 1 mg/kg vs. 6 mg/kg in adequate diets) at weaning in both sexes for a 6-wk period produced cardiac hypertrophy. Male rats developed more severe copper-deficiency symptoms than their female counterparts. In both sexes of copper-deficient rats, there was an increase in cardiac length, width, free ventricular wall thickness and septum thickness. Electrocardiographic tracings revealed greater QRS height among male copper-deficient rats. Heart rate also was substantially reduced in this group. The increased volume of myocardium occupied by mitochondria in the copper-deficient male rats might result in increased electrical resistance that would increase the QRS height; hypertrophy or anemia also could be contributory. Some male copper-deficient rats had prolongation of the QRS in a bundle branch block pattern. Maximal rates of rise and fall for left ventricular pressure were reduced in male copper-deficient rats. The gross histology indicated that this type of heart failure was more concentric than eccentric. The copper-deficient male rat may serve as a useful model for studying the concentric cardiac hypertrophy that occurs in humans.
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471
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Characterization of a human interleukin 1 inhibitor. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 1985; 134:3882-6. [PMID: 3872905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Human urine contains a specific inhibitor of interleukin 1 (IL 1) that is found in increased amounts during fever. This inhibitor was purified by using a sequence of ammonium sulfate fractionation, DEAE cellulose ion-exchange chromatography, molecular sieve chromatography on Sephacryl S-200, affinity chromatography on concanavalin A (Con A) Sepharose, and polyacrylamide gel electrophoresis. Two peaks of IL 1 inhibitory material were eluted from the polyacrylamide gels. One peak contained three proteins of 29, 32, and 67 kd, respectively, which could be visualized by silver staining. The second peak contained only a small amount of the 67 kd protein. A partially purified inhibitor fraction was found to cross-react with antisera directed against two low m.w. urine trypsin inhibitors that are cleavage products of the serum inter-alpha-trypsin inhibitor. Although these findings suggest that the urine IL 1 inhibitor may be related to the inter-alpha-trypsin inhibitor, a more exact identification will require either a homogeneous inhibitor preparation or a monospecific antiserum.
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472
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Characterization of a human interleukin 1 inhibitor. THE JOURNAL OF IMMUNOLOGY 1985. [DOI: 10.4049/jimmunol.134.6.3882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Human urine contains a specific inhibitor of interleukin 1 (IL 1) that is found in increased amounts during fever. This inhibitor was purified by using a sequence of ammonium sulfate fractionation, DEAE cellulose ion-exchange chromatography, molecular sieve chromatography on Sephacryl S-200, affinity chromatography on concanavalin A (Con A) Sepharose, and polyacrylamide gel electrophoresis. Two peaks of IL 1 inhibitory material were eluted from the polyacrylamide gels. One peak contained three proteins of 29, 32, and 67 kd, respectively, which could be visualized by silver staining. The second peak contained only a small amount of the 67 kd protein. A partially purified inhibitor fraction was found to cross-react with antisera directed against two low m.w. urine trypsin inhibitors that are cleavage products of the serum inter-alpha-trypsin inhibitor. Although these findings suggest that the urine IL 1 inhibitor may be related to the inter-alpha-trypsin inhibitor, a more exact identification will require either a homogeneous inhibitor preparation or a monospecific antiserum.
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473
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Abstract
The urine of febrile patients has been found to contain high concentrations of an inhibitor of interleukin 1 (IL-1)-induced thymocyte proliferation. The inhibitor is specific for IL-1 and does not block the effects of interleukin 2 (IL-2) or phytohemagglutin (PHA) on thymocytes, and it is not nonspecifically toxic for these cells. IL-1 inhibitor can be found in the urine of normal individuals and afebrile patients, but is present in increased concentrations in the urine of patients with fever of diverse etiologies. Preliminary physicochemical characterization indicates that the inhibitor is a 20-40-kdalton protein.
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474
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[Microscopic observation of the adherence of Streptococcus mutans]. SICHUAN YI XUE YUAN XUE BAO = ACTA ACADEMIAE MEDICINAE SICHUAN 1983; 14:57-61. [PMID: 6573028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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