Regulatory proteins for the activated third and fourth components of complement (C3b and C4b) in mice. I. Isolation and characterization of factor H: the serum cofactor for the C3b/C4b inactivator (factor I)

Factor H, purified from mouse EDTA-plasma using a 4-step procedure, consists of a single polypeptide chain of Mr 150,000 on SDS-PAGE. Mouse H (Hmo) was required for the cleavage of fluid-phase mouse C3b by mouse I (Imo). The final product of degradation of fluid-phase mouse C3b was iC3b, consisting of fragments of the alpha'-chain (alpha'-70, alpha'-43) linked by disulfide bonds to an intact beta-chain. Imo alone was capable of cleavage of membrane-bound mouse C3b and of generating iC3b. The addition of Hmo nevertheless had an enhancing effect on Imo activity, but cleavage did not proceed beyond iC3b. These observations suggest that one important function of Hmo is to permit the inactivation of fluid-phase C3b, and to inhibit irreversibly its activity. The concentration of H in the plasma of male and female BALB/c mice was not significantly different. Among different inbred strains of mice, large differences were observed in the plasma levels of H, and plasma H levels were positively correlated with the plasma levels of C3. This observation, taken together with the well known role of H in the control of the activation of the alternative pathway, suggests that the turnover of C3 is controlled to some extent by H.     

Effects of Dextrose Gel in Newborns at Risk for Neonatal Hypoglycemia in a Baby-Friendly Hospital

ObjectiveTo describe the effects of the introduction of dextrose gel to the neonatal hypoglycemia (NH) protocol on exclusive breastfeeding rates at discharge and NICU admission rates among clinically well newborns born at 35 weeks gestation or greater who were at risk for NH in a Baby-Friendly hospital.DesignQuasi-experimental, pre- and postintervention.SettingA suburban, Baby-Friendly hospital with approximately 2,000 births annually.ParticipantsClinically well newborns born at 35 weeks gestation or greater at risk for NH who were admitted to the mother–baby unit.MethodsWe compared 198 newborns at risk for NH born in the 6-month period before the introduction of dextrose gel (November 15, 2016, through May 14, 2017) versus 203 newborns born in the 6-month period after the introduction (May 15, 2017, through November 14, 2017). In the preintervention group, the NH protocol included blood glucose monitoring, prolonged skin-to-skin contact, feeding, and dextrose administered intravenously. In the postintervention group, oral dextrose gel was added to the NH protocol.ResultsWe found no differences in maternal or newborn characteristics between the pre- and postintervention groups. Dextrose gel was given to 50 newborns (approximately 25%) of 203 in the postintervention group. The proportion of newborns who were exclusively breastfed at discharge was similar between groups (56.6% of 198 vs. 59.1% of 203, p = .62), as were the NICU admission rates for hypoglycemia (2.5% of 198 vs. 1.5% of 203, p = .50).ConclusionsIn a suburban Baby-Friendly hospital, introduction of dextrose gel into the NH protocol had no significant effect on exclusive breastfeeding at discharge or NICU admission rates.     

Antimicrobial activity and chemical composition of Mentha pulegium L. essential oil

ETHNOPHARMACOLOGICAL RELEVANCE: The flowering aerial parts of Mentha pulegium L. (Labiatae) has been traditionally used for its antiseptic properties for treatment of infectious diseases. AIM OF THE STUDY: In order to validate its antiseptic properties with respect to traditional uses, we have screened the antimicrobial activity of flowering aerial parts of Mentha pulegium L. essential oil against different microorganisms. MATERIALS AND METHODS: This oil was obtained using hydrodistillation method and analyzed by GC and GC/MS. The antimicrobial activity was achieved using disc diffusion method and microbroth dilution assay. RESULTS: Analysis of the essential oil revealed the presence of piperitone (38.0%), piperitenone (33.0%), alpha-terpineol (4.7%), and pulegone (2.3%) as the major components. The results showed a significant activity against microorganisms especially Gram-positive bacteria with inhibition zones and minimal inhibitory concentration values in the range of 8-21mm and 0.25-4mul/ml, respectively, whereas the least susceptible were Gram-negative bacteria especially Escherichia coli. CONCLUSIONS: This investigation showed that the oil of Mentha pulegium L. has a potent antimicrobial activity and the Iranian Mentha pulegium L. oil belongs to piperitone/piperitenone type. Further research is required to evaluate the practical values of therapeutic applications.     

葛根素治疗急性脑梗死患者的临床研究

目的：探讨葛根素治疗急性脑梗死的效果。方法：选择发病6～72h的急性脑梗死患者240例，随机分为葛根素治疗组120例和低分子右旋糖酐对照组120例，两组治疗前后测定血液流变学指标，并对比研究其疗效。结果：治疗组基本痊愈72例（60％），显著进步36例（30％），总显效（基本痊愈＋显著进步）108例（90％），对照组基本痊愈16例（13．3％），显著进步18例（15％），总显效（基本痊愈＋显著进步）34例（28．3％）。治疗组的疗效明显优于对照组。血液流变学改变，与治疗前比也有显著改善，治疗组优于对照组。结论：葛根素治疗急性脑梗死患者效果显著，且并无严重毒副作用。     

How Much Glucose Is in the Gel Used to Treat Neonatal Hypoglycemia?

ObjectiveTo compare glucose concentrations in three sections of individual tubes and among tubes of commercial oral glucose gels commonly used to treat neonatal hypoglycemia in the United States (Glutose 15 [Perrigo, Minneapolis, MN] and Insta-Glucose [Valeant Pharmaceuticals North America LLC, Bridgewater, NJ]).DesignA quantitative laboratory study.MethodsWe measured glucose concentrations in aliquots taken from the top, middle, and bottom sections of three different lots and in whole tubes from different lots of Glutose 15 and Insta-Glucose. We measured the glucose content in the gel using hexokinase and glucose-6-phosphate dehydrogenase enzymes on the Siemens ADVIA 1800 analyzer (Siemens Healthcare Diagnostics, Inc., Tarrytown, NY).ResultsThe percent difference observed among the three sections of the Glutose 15 tubes was 12.3% to 53.8%. The difference among the three sections of the Insta-Glucose tubes was 40.7% to 79.6%. The concentration of glucose gel is labeled as 40%, but the actual concentration in aliquots of Glutose 15 ranged from 39.64% to 70.96%. The actual concentration in aliquots of Insta-Glucose ranged from 16.45% to 27.47%. The difference in the concentration of glucose among three lots of whole tubes of Glutose 15 was 1.6%, and the difference in concentration among three lots of whole tubes of Insta-Glucose was 8.8%. In Glutose 15, the concentration ranged from 48.3% to 49.1%, and Insta-Glucose, the concentration ranged from 17.2% to 18.8%.ConclusionGlucose was not uniformly distributed within tubes of Glutose 15 and Insta-Glucose, and this may account for variable results on the efficacy of oral glucose gel as a treatment for neonatal hypoglycemia.     

Four pentacyclic triterpenoids with antifungal and antibacterial activity from Curtisia dentata (Burm.f) C.A. Sm. leaves

ETHNOPHARMACOLOGICAL RELEVANCE: Curtisia dentata is used in southern Africa to treat various diseases of bacterial and fungal origin in humans and animals to such a degree that the species is vulnerable and declining [Dold, A.R., Cocks, M.L., 2001. Traditional veterinary medicine in the Alice district of the Eastern Cape Province, South Africa. South African Journal of Science 97, 375-379]. Preliminary studies indicated good activity against Candida albicans. AIM OF THE STUDY: The phytochemistry and antimicrobial activity of this plant species has not been extensively investigated, and a closer examination of the compounds responsible for antimicrobial activity was warranted. MATERIALS AND METHODS: Broth microdilution assay and bioautography were used to evaluate antibacterial and antifungal activity in Curtisia dentata leaf extracts and fractions. Bioassay-directed fractionation using column chromatography yielded four compounds characterised by spectroscopic methods. RESULTS: Lupeol (1), betulinic acid (2), ursolic acid (3) and 2alpha-hydroxyursolic acid (4) were isolated from Curtisia dentata leaves. Betulinic acid, ursolic acid and 2alpha-hydroxyursolic acid appreciably inhibited fungal growth with MIC values ranging from 8 to 63mug/mL. CONCLUSIONS: The isolation of four antibacterial and antifungal triterpenoids is reported for the first time from Curtisia dentata. This study provides information on the antimicrobial compounds of this species, as well as a preliminary rationale for the use in traditional South African medicine.     

Antimicrobial activity of the crude extracts and five flavonoids from the twigs of Dorstenia barteri (Moraceae)

The aim of this study was to evaluate the antimicrobial activity of the crude extract of the twigs of Dorstenia barteri (DBT) as well as that of four of the five flavonoids isolated from this extract. Gram-positive bacteria (six species), Gram-negative bacteria (12 species) and fungi (four species) were used. The agar disc diffusion test was used to determine the sensitivity of the tested samples while the well micro-dilution was used to determine the minimal inhibition concentrations (MIC) and the minimal microbicidal concentration (MMC) of the active samples. The results of the disc diffusion assay showed that DBT, isobavachalcone (1), and kanzonol C (4) prevented the growth of all the 22 tested microbial species. Other compounds showed selective activity. The inhibitory activity of the most active compounds namely compounds 1 and 4 was noted on 86.4% of the tested microorganisms and that of 4-hydroxylonchocarpin (3) was observed on 72.7%. This lowest MIC value of 19.06microg/ml was observed with the crude extract on seven microorganisms namely Citrobacter freundii, Enterobacter aerogens, Proteus mirabilis, Proteus vulgaris, Bacillus megaterium, Bacillus stearothermophilus and Candida albicans. For the tested compounds, the lowest MIC value of 0.3microg/ml (on six of the 22 organisms tested) was obtained only with compound 1, which appeared as the most active compound. This lowest MIC value (0.3microg/ml) is about 4-fold lower than that of the RA, indicating the powerful and very interesting antimicrobial potential of isobavachalcone (1). The antimicrobial activities of DBT, as well as that of compounds 1, 3, 4, amentoflavone (5) are being reported for the first time. The overall results provide promising baseline information for the potential use of the crude extracts from DBT as well as some of the isolated compounds in the treatment of bacterial and fungal infections.     

白术多糖葡萄糖的含量测定

目的 :研究和分析测定白术多糖、葡萄糖的含量 .方法 :采用水提醇沉法提取白术多糖 ,用硫酸 苯酚法在 4 89.3nm处用紫外分光光度法测定 ,用酶法在 5 0 5nm处测定葡萄糖的含量 .结果 :浙江白术与怀化白术多糖含量差异较大 ,测得结果平均回收率 10 3.1% ,RSD为 1.16 % .结论 :简便 ,快速 ,准确 ,可靠 ,可用于不同产地白术的鉴别和质量控制     

Graft Transit Time Has No Effect on Outcome of Unrelated Donor Hematopoietic Cell Transplants Performed in Australia and New Zealand: A Study from the Australasian Bone Marrow Transplant Recipient Registry

A previous study found that platelet recovery and mortality were worse in recipients of myeloablative bone marrow transplants where graft transit times were longer than 20 hours. This retrospective study of unrelated myeloablative allogeneic transplantation performed within Australia and New Zealand analyzed transplant outcomes according to graft transit times. Of 233 assessable cases, 76 grafts (33%) were sourced from bone marrow (BM) and 157 (67%) from peripheral blood. Grafts sourced from Australia and New Zealand (47% of total) were associated with a median transit time of 6 hours versus 32 hours for overseas sourced grafts (53% of total). Graft transit temperature was refrigerated in 85%, ambient in 6%, and unknown in 9% of cases, respectively. Graft transit times had no significant effect on neutrophil or platelet engraftment, treatment-related mortality, overall survival, and incidence of acute or chronic graft-versus-host disease. Separate analysis of BM grafts, although of reduced power, also showed no significant difference in either neutrophil or platelet engraftment or survival between short and longer transport times. This study gives reassurance that both peripheral blood stem cell and especially BM grafts subjected to long transit times and transported at refrigerated temperatures may not be associated with adverse recipient outcomes.