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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 64 (1999), S. 144-147 
    ISSN: 1432-0827
    Keywords: Key words: Osteoporosis — Leprosy — Hypogonadism — Male.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Abstract. We measured the bone mineral density (BMD) of 353 leprosy patients (197 males 50–89 years old, average age 70.2; and 156 females 53–90 years old, average age 72.9) and serum levels of free testosterone (FT) in 81 males. The BMD of the lumbar vertebrae (L2–L4), diaphysis of the radius (1/3 radius), and the neck of the femur (neck) was measured using DXA (QDR 4500). The BMD of −2.5 SD YAM (young adult mean) in Japanese men and women was used as the cutoff value for osteoporosis in the respective genders: BMD of L2–L4, 0.751 g/cm2 (male), 0.747 g/cm2 (female); 1/3 radius, 0.655 g/cm2 (male), 0.550 g/cm2 (female); neck, 0.581 g/cm2 (female). The percentages of males with osteoporosis were 31.3% in the 50th, 32.9% in the 60th, 44.9% in the 70th, and 40.7% in the 80th decade at L2–L4. Similarly, the percentages were 33.3%, 58.3%, 74.3%, and 75.0%, respectively, at 1/3 radius. Among females, the percentages were 22.2%, 41.3%, 44.9%, and 68.8%, respectively, at L2–L4; 0%, 42.9%, 89.5%, and 78.6%, respectively, at 1/3 radius; and 11.1%, 38.6%, 67.7%, and 84.6% respectively, at neck. FT in men ranged from almost 0 to normal at each decade and BMD levels were significantly correlated with FT in all three regions of the skeleton (P 〈 0.0001). More than 30% of osteoporosis was found at each decade and FT may be one of the main factors affecting BMD in male leprosy patients.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0428
    Keywords: Keywords Type II diabetes mellitus ; extracellular matrix ; glomerulosclerosis ; type IV collagen ; Otsuka-Long-Evans-Tokushima-Fatty rat.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Aims/hypothesis. Advanced glycation end products (AGEs) participate in the pathogenesis of diabetic nephropathy. We reported earlier that OPB-9195, a synthetic thiazolidine derivative and novel inhibitor of advanced glycation, prevented progression of diabetic glomerulosclerosis by lowering serum concentrations of advanced glycation end products and reducing their deposition in the glomeruli. Here, we examined their contribution and that of growth factors, such as transforming growth factor-β (TGF-β) and vascular endothelial growth factor (VEGF), to the progression of diabetic nephropathy. We also investigated the expression of type IV collagen in the kidneys of Otsuka-Long-Evans-Tokushima-Fatty (OLETF) rats, a Type II (non-insulin-dependent) diabetes mellitus model, after treatment with OPB-9195. Methods. Using northern blots and immunohistochemical techniques, we determined the renal expression of TGF-β and type IV collagen mRNAs and proteins in OLETF rats. We also examined OPB-9195's effects on renal expression of VEGF mRNA and protein. Results. Concomitant increases in TGF-β and type IV collagen expression were observed at each point in time in OLETF rats not given OPB-9195. In contrast, OPB-9195 treatment greatly suppressed the renal expression of TGF-β, VEGF and type IV collagen mRNAs and proteins to that seen in non-diabetic rats. Conclusion/interpretation. Since OPB-9195, an AGE-inhibitor, prevented the progression of diabetic nephropathy by blocking type IV collagen production and suppressing overproduction of two growth factors, TGF-β and VEGF, in diabetic rats, this compound warrants further investigation. [Diabetologia (1999) 42: 579–588]
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have measured the electrical resistivity ρ and the thermal conductivity κ of Sr 14−x A x Cu 24 O 41(A = Ca and La) single crystals. The Arrhenius plot of ln ρ vs T −1 gives two kinds of activation energy with a boundary temperature T ρ . The activation energy at T 〈 T ρ is in approximate agreement with the spin gap in the ladder estimated from the NMR measurements, suggesting that holes in the ladder are paired and localized at T 〈 Tρ. The observed κ has been analyzed to be composed of κ ph , κ spin and κ hole due to phonons, spins and holes, respectively. The κ ph exhibits a small peak at ∼ 30 K in every direction of every single-crystal. The contribution of κ spin is observed along the c-axis except for x(Ca) ≥ 6, and the spin gap, which corresponds to the spin excitation from spin-singlet to spin-triplet, has been estimated to be ∼ 420 K. For x(Ca) ≥ 6, the spin gap, which corresponds to the destruction of spin-singlet pairs i. e. the dissociation of hole pairs, has been estimated from κ along the c-axis at T 〉 T ρ to decrease with increasing x(Ca).
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1617-4623
    Keywords: Key words Peptidoglycan ; Cell wall hydrolase gene ; N-acetylmuramoyl-L-alanine amidase ; Bacillus polymyxa var. colistinus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The cwlV gene, which encodes Bacillus polymyxa var. colistinus autolysin was cloned and sequenced. cwlV comprises a 1497-bp ORF and encodes a polypeptide of 499 amino acid (aa) residues (Mr of 53,707 Da). The N-terminal sequence of the mature 23-kDa CwlV protein is NSXGKKVVVIDAGXGAKD(X, undetermined aa); this processed form corresponds to the C-terminal portion (183 aa, Mr of 20,050 Da) of the cwlV ORF. Sequencing of the flanking region revealed that another putative autolysin gene, cwlU, is located upstream of cwlV. cwlU encodes a polypeptide of 524 aa and its deduced sequence is 34.9% identical to the full-length sequence of CwlV. Downstream of cwlV, the genes for a deduced lipoprotein (OrfW), an endonuclease III homolog (Nth), a non-homologous OrfX, a glutathione peroxidase homolog (Gpx), and the N-terminal region of OrfZ containing a ATP/GTP-binding site motif were found. Northern blotting and primer-extension analyses revealed that cwlU is transcribed as a single cistron, but cwlV is transcribed with orfW. The unprocessed forms of CwlV and CwlU (VΔS and UΔS, respectively) and their predicted mature forms (Vcat and Ucat, respectively) were expressed in, and purified from, Escherichia coli. Enzyme analysis indicated that VΔS and Vcat exhibit low and high cell wall hydrolase activities toward B. polymyxa cell wall, respectively, but UΔS and Ucat exhibit almost no and low cell wall hydrolase activities, respectively.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-5036
    Keywords: Al tolerance ; 1 ; 3-β-glucan ; K leakage ; plasma membrane ; protoplasts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Experiments were carried out to identify the primary site for aluminium (Al) toxicity in roots. Al accumulated in large amounts in the younger and outer cells in roots of pea and was retarded when the ionic strength of the Al solution was high. Cell destruction was extensive in the regions with high Al accumulation. The accumulation of Al in, and potassium (K) leakage from, the root tip were in the order pea〉maize〉rice, the same order as their sensitivity to Al. The protoplasts from the root tip portion of pea incubated with Al showed a wrinkled and uneven surface. The protoplasts progressively shrank and eventually collapsed. Viability decreased in this process. In the control protoplasts of maize, β-glucan formation was uniform on the spherical surfaces, whereas it was spotty in the Al-treated protoplasts; the cell wall material of the latter contained partly 1, 3-β-glucan which is known to be synthesised by 1, 3-β-glucan synthase embedded in the plasma membrane. These results suggest that the specific site for Al toxicity is the plasma membrane of younger and outer cells in roots and that Al tolerance depends largely on the integrity of the plasma membrane.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 31 (1996), S. 2481-2486 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The fluorine doping process of pure silica “soot” with various type of fluorine gases in the vapour-phase axial deposition (VAD) sintering process was investigated in detail. This investigation showed that the doping level is proportional to the 1/4 power of the concentration of the fluorine gas, and the achievable reduction of relative refractive index is −0.75% with this process. The kinetic investigation clarified that the fluorine doping process consists of the doping and dissociation reactions; the former reaction obeys the 1/2 power of the SiF4 partial pressure and the latter the two power of fluorine content [SiO1.5F], where SiO1.5F represents a silicon tetrahedron consisting of one fluorine and three bridging oxygen atoms in glass. The fluorine content is proportional to the 1/4 power of the SiF4 partial pressure at an equilibrium where the doping reaction is in competition with the dissociation reaction.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1437-9813
    Keywords: Extracorporeal membrane oxygenation ; High-frequency oscillatory ventilation ; Congenital diaphragmatic hernia ; Oxygenation index ; Alveolararterial oxygen gradient
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Although respiratory management with high-frequency oscillatory ventilation (HFOV) has generally been used for neonates with congenital diaphragmatic hernia (CDH), entry criteria for extracorporeal membrane oxygenation (ECMO) based on data from patients who underwent HFOV have not yet been reported. To establish entry criteria for ECMO in such patients, we retrospectively studied 36 neonates with CDH treated by HFOV in our institutions between 1986 and 1994. From the admission records, preductal and postductal arterial blood gas data and HFOV ventilation conditions for 72 h after admission were extracted. Oxygenation index (01) and alveolar-arterial oxygen gradient (A-aD02) time interval combinations were calculated. Patients were divided into two groups: candidates for ECMO (n = 22) who underwent ECMO (n = 18) or died without ECMO (n = 4); and non-candidates (n = 14), who survived without ECMO. Blood gas data in patients placed on ECMO were comparable to those in patients who died without ECMO: mean pre- and postductal OI for 4 h 〉 30, postductal A-aD02 ≥620 mmHg for 4 h, postductal A-aD02 ≥580 mmHg for 8 h, and postductal A-aD02 ?550 mmHg for 12 h showed better sensitivity with a specificity of more than 90% compared to entry criteria that had previously been used in our institutions: a postductal OI 〉40 for 4 h and postductal A-aDO2 ≥610 mmHg for 8 h. In addition, a combination of preand postductal OI 〉30 for 4 h indicated a sensitivity of 95.5% and a specificity of 92.9%.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1437-9813
    Keywords: Prenatal diagnosis ; Congenital diaphragmatic hernia ; Pulmonary hypoplasia ; High-frequency oscillatory ventilation ; Extracorporeal membrane oxygenation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The outcome of fetuses with congenital diaphragmatic hernia (CDH) has been reported to be fatal when pulmonary hypoplasia (PH) is severe. As an indicator of PH, we attempted to measure the lung-thorax transverse area ratio (L/T) using ultrasonic echography. Immediate postnatal surgery was performed using high-frequency oscillatory ventilation (HFOV) and sometimes followed by extracorporeal membrane oxygenation (ECMO). Eighteen fetuses were treated and 14 survived. L/T correlated well with the best preductal arterial blood gas data before surgical reduction during manual ventilation and HFOV, while preductal PO2 and alveolar-arterial oxygen differences from patients managed with HFOV were better than those in patients with manual ventilation. Although L/T also correlated with the duration of O2 therapy and hospitalization in survivors without major anomalies, there was no significant difference between L/T in survivors and nonsurvivors. Because delayed institution of ECMO and complications related to ECMO management seemed to be a major cause of death in non-survivors, the unsalvageable L/T due to PH was estimated to be below 0.06 for HFOV and below 0.1 for conventional ventilation based on the correlation between L/T and preductal P02. These results suggest that L/T is a useful indicator of PH in patients with CDH and also that HFOV is advantageous in treating CDH with PH. The advantage of prenatal diagnosis in predicting unsalvageable L/Ts, should be considered in the therapeutic strategy.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 13 (1998), S. 602-604 
    ISSN: 1437-9813
    Keywords: Key words Biliary atresia ; Portal hypertension ; Jejunopathy ; Gastroenteropathy ; Endoscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This paper describes a rare case of biliary atresia (BA) in which massive postoperative bleeding developed due to portal hypertensive enteropathy. A 15-year-old boy had been doing well after Kasai's operation for BA. At around the age of 6 years he developed recurrent episodes of esophageal variceal bleeding and underwent esophageal transection, splenectomy, sclerotherapy, and embolization of the left gastric vein. At the age of 15 years he suddenly developed abdominal pain, hematemesis, and massive tarry stools. His hemoglobin level was 6.3 g/dl. Endoscopy showed several small, polypoid lesions in the jejunum beyond Treitz' ligament. The source of the bleeding was one of these lesions located in the proximal jejunojejunostomy of the Roux-en-Y loop. Because he had repeated episodes of melena, he underwent partial resection of the jejunum under endoscopic guidance. He has since been free of gastrointestinal (GI) bleeding. From this experience, we conclude that the polypoid lesions of an enteropathy may be a cause of massive GI bleeding in the postoperative portal hypertension of BA.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1437-9813
    Keywords: Key words Prenatal diagnosis ; Congenital cystic adenomatoid malformation of the lung ; Pulmonary sequestration ; Fetal ultrasound
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We examined the clinical significance of the lung-thorax transverse-area ratio (L/T) in fetuses with cystic lung disease (CLD). The transverse section of the thorax was analyzed at the level of the 4-chamber view of the heart. L/T was calculated as the bilateral normal lung area divided by the thoracic area. Within a 9-year period, ultrasonography was performed in 15 fetuses with CLD, 13 of which were histologically diagnosed: congenital cystic adenomatoid malformation of the lung (CAM; n = 8), pulmonary sequestration (n = 4), and bronchial atresia (n = 1). Although the initial L/T measurement (29.6 ± 4.2 weeks) showed significantly lower values than in the controls, the final measurement (36.4 ± 1.6 weeks) indicated that the L/T in CLD excluding CAM was significantly higher than that in CAM. Six patients with a final L/T of less than 0.21 required mechanical ventilation immediately after birth. Two of these patients died, and the autopsy findings indicated pulmonary hypoplasia. In these cases, a significant correlation was observed between the maximal value of L/T and preductal alveolar-arterial oxygen difference (A-aDO2), although the final L/T was not correlated to A-aDO2. These results indicate that serial measurements of L/T may be useful in the diagnosis of CLD and may help to predict postnatal respiratory conditions.
    Type of Medium: Electronic Resource
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