Normal CMC Research Articles

Aktivitas Antidiabetes Serbuk Semut Jepang (Tenebrio molitor Linn.) pada Mencit Swiss Webster Jantan yang Diinduksi Aloksan

Diabetes mellitus is a disease caused by metabolic disorders with hyperglycemia conditions that can occur due to impaired insulin secretion, insulin sensitivity or both. Semut Jepang (SJ) are used by people of Indonesians as a drug to reduce blood sugar levels, but have not been scientifically studied as antidiabetic. Therefore, this study aims to examine the antidiabetic activity of Japanese ant powder in mice. Method: The study was carried out using the antihyperglycemic method in mice induced by alloxan. In the antihyperglycemic method in alloxan induced mice, mice were divided into 6 groups, namely 1% normal Na CMC control group (not alloxan induced), 1% Na CMC pain control group (alloxan induced), glibenclamide 5 mg / kg bw comparison group, and 3 test groups were given Japanese ant powder with a dose of 9 mg / kg bw (SJ 9), 45 mg / kg bw (SJ 45), and 90 mg / kg bw (SJ 90). Blood glucose levels were measured on the first day, day 3, day 7, and day 14. Results: The use of SJ 45 and SJ 90 were better in lower blood glucose compared to the glibenclamide comparison group. Conclusion: Japanese ant powder at doses of 45 and 90 mg / kg bw give an antidiabetic effect that is better than glibenklamid 5 mg / kg bw in reducing blood glucose levels in mice induced by alloxan.
 
 Keyword : Semut jepang powder, diabetes mellitus, blood glucose level

Study of effect of Nigella sativa on prevention of nephrotoxicity induced by colistin in experimental animals

ABSTRACTBackground: Nigella sativa, a widely used medicinal plant throughout the world belongs to family ranunculaceae. Its Seeds and oil have a long history of folklore usage in various traditional systems of medicines and food. This study was performed to evaluate the protective effect of Nigella sativa oil (NSO) on kidney when simultaneously given with colistin sulfate (CS) which induces tubular damage in rats.Methods: Animals were treated for 7 days: Group I (n=6) with normal saline and CMC, Group II, III and IV with 300.000IU/kg/day of CS (n=6). Group III and Group IV with NSO at the dose of 1 and 2ml/kg per orum prior to CS administration. All the animals were sacrificed on 8th day. Afterwards, the plasma creatinine (pCr), blood urea, renal tissue level of malondialdehyde (MDA), reduced glutathione (GSH) and renal histology were performed.Results: Colistin sulfate induced tubular damage, increased the plasma creatinine (pCr), blood urea and MDA levels and decreased the reduced glutathione (GSH). However, simultaneous treatment with Nigella sativa oil at the dose of 1ml/kg and 2ml/kg for one week produced dose dependant improvement in tubular damage and reduced the biochemical alteration.Conclusions: It could be concluded that, Colistin sulfate induced nephrotoxicity is ameliorated by NS oil especially in higher dose of (2ml/kg). This nephroprotective effect is ascribed to free radical scavenging and potent antioxidant activity in Nigella sativa.

Fluorescence behavior of cis-methyl orange stabilized in cationic premicelles

The cis-isomer of methyl orange (MO), stabilized in cationic premicelles, has been found to be fluorescence active when excited at wavelength ≤270nm. An intense fluorescence band with maximum at 575nm along with a broad moderate intensity band in the range of 370-530nm and a low intensity band at 361nm have been observed. The major band at 575nm has been attributed to S1→S0 (n-π(*)) fluorescence unlike the other azobenzenes where the S2→S0 (π-π(*)) fluorescence is usually reported. UV-Vis spectral and surface tension study indicate that the dye exists in the trans form in dye-surfactant ionpair (DSIP) at very dilute concentrations of the surfactant. But the polar cis-isomer is stabilized by micellization of the DSIPs as the concentration of the surfactant is increased. The fluorescence and hence the cis-isomer again disappear when normal micelles are formed above the normal CMC of the surfactant. It has been suggested that the symmetry forbidden S1→S0 (n-π(*)) transition of MO becomes allowed due to the formation of the twisted cis-form. TD-DFT calculations have been used as an auxiliary tool to identify the possible structures and electronic transitions responsible for the specific absorption and fluorescence properties of MO observed in presence of premicellar cationic surfactants.

ACTIVITY OF ETHANOLIC EXTRACT FROM Justicia gendarussa Burm. LEAVES ON DECREASING THE URIC ACID PLASMA

The effect of Justicia gendarussa leaves extract has been investigated using oxonate-induced hyperuricemic male albino rats. In this experiment thirty five male albino rats were divided randomly into seven groups. There were three group doses variations of J. gendarussa extract that were 1.3 g/kg bw, 2.6 g/kg bw and 5.2 g/kg bw; two comparison groups that were allopurinol 0.68 g/kg bw and herbal “X” 0.85 g/kg bw; and two control groups that were induced control potassium oxonate 0.25 mg/kg bw and normal control CMC 0,5 %. Intraperitoneal administration of potassium oxonate 0.25 mg/kg bw was given one hour before administration of test drugs in eight day and plasma uric acid was measured in rats after two hours. Plasma uric acid was measured by spectrophotometric on 520 nm with enzymatic method. The results showed that all extracts could reduced uric acid level of rats. The decreasing potency of uric acid level was equal to doses increase, so the best result that can reduce uric acid level was J. gandarussa extract at a dose 5.2 g/ kg bw. This results indicated that J. gendarussa leaves extract may be effective for the prevention and the treatment of hyperuricemia. Keywords: enzymatics, hyperuricemia, Justicia gendarussa Burm, spectrophotometric

Physicochemical and Conformational Studies on BSA−Surfactant Interaction in Aqueous Medium

In this paper, results of physicochemical studies on the interaction of bovine serum albumin (BSA) with alkyltrimethylammonium bromide (ATAB), pentaethylene glycol mono-n-dodecyl ether (C12E5), and sodium dodecyl sulfate (SDS) under the experimental conditions of phosphate buffer at pH 7 in the presence of 10 mM sodium bromide (NaBr), maintaining the ionic strength of the overall solution at micro = 0.015 M, have been presented and discussed. Here, BSA-ATAB corresponds to a polyion-surfactant system bearing opposite charges. BSA precipitated out of the solution on addition of ATAB solution over a certain range of ATAB concentration, the concentration range being dependent on the particular member of the ATAB family. In our earlier reports on the precipitation of oppositely charged polymer-surfactant, the tensiometric profile for surfactant addition in polymer solution differed significantly from that expected from addition of surfactant in the dispersion medium. In the present study, the precipitation process could hardly affect the smoothness of the tensiometric profile. This indicates the interaction process is operative in bulk solution. Microcalorimetric profiles also evidenced an extra hump in the interaction profile at lower surfactant concentrations, without much affecting the dilution enthalpograms beyond micellization. This interaction appeared unimodal and the extent of interaction increased with increasing tail length of ATAB, evidencing the hydrophobic effect to be an important factor. Addition of salt (NaBr) also affected the nature of interaction: at lower concentration of NaBr, the interaction was mildly assisted, whereas 50 mM NaBr fairly assisted the interaction. The nonionic surfactant C12E5 modestly interacted with BSA. The anionic amphiphile SDS, on the other hand, interacted with BSA in two distinctly different stages, as evidenced from the tensiometric profile. The complexity of the BSA-SDS tensiometric isotherm compared to that of BSA-ATAB arose from the presence of cationic binding sites adjacent to hydrophobic patches of BSA in its native state, so that electrostatic and hydrophobic interactions can cooperatively operate side by side. The interfacial saturation occurred at a lower concentration in the presence of BSA compared to the normal cmc of SDS under identical solution conditions in the absence of BSA, which was slightly delayed for nonionic C12E5. The multitechnique approach evidenced that different experimental techniques probe different physicochemical phenomena and an attempt to show the concurrence of the break points in different techniques is only diluting the essence of this area.

Structure of Sodium Dodecyl Sulfate Bound to a Poly(NIPAM) Microgel Particle

Dynamic light scattering, small-angle neutron scattering, and binding isotherm measurements have been performed on an aqueous poly(N-isopropylacrylamide) microgel particle in the presence of the surfactant sodium dodecyl sulfate (SDS). In the presence of the microgel, at concentrations just above the normal cmc the surfactant existed as small, polymer-bound aggregates of less than five monomer units rather than larger micelles. This is in stark contrast to other homopolymer/surfactant systems such as SDS/poly(ethylene oxide) where the polymer-bound micelles have structures similar to those of free micelles obtained without polymers. Both dynamic light scattering and small-angle neutron scattering measurements showed that the microgel swells in the presence of surfactant. Two surfactant concentrations (1% w/w and 0.3% w/w) were used for the neutron scattering experiments, and through selective deuteration of the solvent, the different components, either the poly(N-isopropylacrylamide) gel or the SDS, were ...

Phase conditions, hydrodynamic features and salt influence in the polymer-amphiphile interaction for the EHEC/SDS/water system

Two fractions of ethyl(hydroxy)ethyl cellulose, EHEC, and their interactions with sodium dodecyl sulphate, SDS, have been investigated. The effect of salt on these interactions was explored. The more hydrophobic fraction exhibits a cloud point (CP) of 30°C, and the more hydrophilic fraction has a CP around 65°C. The properties of the systems were studied by means of hydrodynamic (viscosity), equilibrium dialysis and cloud point measurements. Dye solubilization was used to obtain indications of cluster formation on the polymer backbone. The equilibrium dialysis shows a steep binding beginning at a critical surfactant concentration indicating a cooperative effect in the EHEC/SDS/water system. It is found that when the degree of binding is moderate and only 10–20% of the value at saturation, the specific viscosity effects occur and solutions containing high polymer concentrations pass a marked maximum in viscosity. It is shown that the maximum in viscosity and the collcoil interaction, expressed as Huggins constant,kH, appear a composition with the same fractional amount of SDS adsorbed to both EHEC fractions. It was found that the onset of redistribution and increase in viscosity were shifted to higher SDS concentrations, although still below the normal CMC, for the EHEC fraction with a high CP. When small amounts of salt are present in the EHEC/SDS/water solutions, the CP curves develop a pronounced minimum at low SDS concentrations. The redistribution of SDS to the polymers starts immediately in the presence of salt, but the viscosity of the solutions is affected only in a very narrow composition interval.

Interactions between Water-Soluble Cellulose Derivatives and Surfactants. 1. The HPMC/SDS/Water System

The system hydroxypropyl methyl cellulose (HPMC)/sodium dodecyl sulfate (SDS)/water has been investigated over an extended composition interval from infinite dilution to a polymer concentration above the critical overlap concentration (c * ) and a surfactant concentration up to ∼3 times the normal critical micelle concentration (cmc). The aim has been to characterize the redistribution (adsorption) of surfactant to the polymer and to investigate the system properties as a function of this adsorption. Several methods such as viscometry, equilibrium dialysis, cloud point determinations, dye solubilization, and fluorescence spectroscopy have been utilized. The onset of adsorption begins at ∼4.3 mM, and then it increases as an increasingly cooperative phenomenon to a saturation maximum in a region below the normal cmc (∼8 mM). This maximum approaches the normal cmc as the polymer concentration approaches zero. SDS adsorbs in a cooperative manner in the form of clusters, the average aggregation number (N) of which decreases with decreasing polymer concentration from ∼50 for 0.2% HPMC to 20-25 at infinite dilution. The solubilization capacity of the HPMC/SDS/water system is somewhat less than previously reported for the ethyl hydroxyethyl cellulose/SDS/water system. Important rheological effects (high viscosity) are observed in a fairly limited composition range beginning at the onset of adsorption and ending long before adsorption saturation is reached. The maximum capacity of adsorption averaged over the entire polymer chain is found to be of the order of one adsorbed amphiphile molecule per polymer monomer unit.

Induction of Aggregate Formation of Cationic Polysoaps and Surfactants by Low Concentrations of Additives in Aqueous Solution

The induction of aggregate formation of cationic polysoaps ((CL)-Copol C1-12), cetyltrimethylammonium bromide (CTAB), n-dodecyltrimethylammonium bromide (DTAB), and n-dodecylmethyldiallylammonium bromide (DMDAAB) by low concentrations of Methyl Orange (10(-5)-10(-4) M) and anionic surfactants (concentrations below their cmc's) in aqueous solutions was studied using UV-vis absorption and fluorescence spectroscopy. Reduced viscosities were also investigated as a function of polysoap concentration in the presence of low concentrations of the same additives. It was found that the cationic polysoaps, CTAB, DTAB, and DMDAAB aggregate far below their normal cmc in the presence of Methyl Orange in aqueous solution. The cationic polysoaps exhibited an about 5-fold decrease of the reduced viscosity in the presence of the hydrophobic anionic additives but no decrease of the reduced viscosity was found in the presence of hydrophobic nonionic additives and cationic additives (CTAB, DTAB). Depending on the length of the alkyl chains of the organic anionic additives, a conformational transition of the cationic polysoaps was indicated by changes of the reduced viscosity. Pyrene was used as a fluorescence probe to investigate the conformational state of the cationic polysoap CL-Copol C1-12 in the presence of low concentrations of additives. Pyrene fluorescence spectra revealed the formation of hydrophobic microdomains in the presence of the hydrophobic anionic additives depending on the length of alkyl chains. These domains were not observed in the case of hydrophobic cationic additives and nonionic additives.

NMR study of polymer surfactant interaction in the system HPMC/SDS/water

The interaction between the nonionic water soluble polysaccharide hydroxypropylmethyl cellulose (HPMC) and the low molecular weight amphiphile sodiumdodecyl sulphate (SDS) has been studied by NMR1H-chemical shift measurements and by self-diffusion NMR measurements. The polymer concentration has been kept sufficiently dilute to avoid coil overlap and the SDS composition range goes from zero up to well above the normal CMC point. Although a different fraction was used, the present results agree well with previous results for the same system obtained by techniques other than NMR and show very clear break points that can be related to the polymer surfactant interaction. Furthermore, it can be inferred from the chemical shift measurements that the structure of the micellar clusters are similar whether polymer is present or not. From a combination of chemical shift and self diffusion measurements it is also found that neither the size nor the shape of the clusters seem to change significantly in the composition interval investigated.

Low c-kit Expression of Cultured Mast Cells of mi / mi Genotype May Be Involved in Their Defective Responses to Fibroblasts That Express the Ligand for c-kit

Mutant mice of mi/mi genotype are osteopetrotic and deficient in tissue mast cells due to a defect in osteoclasts and mast cells. In an effort to further understand the mechanisms behind why mi/mi mouse-derived cultured mast cells (mi/mi-CMC) responded to interleukin-3 (IL-3), but not to the proliferative stimuli presented by fibroblasts, mi/mi-CMC and congenic normal (+/+) mouse-derived CMC (+/+-CMC), both of which expressed the phenotypic characteristics of immature mast cells, were cocultured with Swiss albino/3T3 fibroblasts in a medium containing IL-3. In the in vitro CMC/fibroblast coculture, mi/mi-CMC did not acquire the phenotypes of connective tissue-type mast cells (CTMC), while +/+-CMC did. In addition, attachment of mi/mi-CMC to the fibroblasts was found to be significantly lower than that of +/+-CMC. Because the interaction of c-kit product with its ligand (stem cell factor [SCF]) is known to play an important role not only in proliferation and differentiation of mast cells but also in attachment of CMC to fibroblasts, the expression and function of c-kit were investigated in mi/mi-CMC and +/+-CMC. Recombinant rat SCF (rrSCF164) induced a dose-dependent proliferation of +/+-CMC. Also, rrSCF164 induced +/+-CMC to acquire the phenotypes of CTMC in the medium containing IL-3. By contrast, rrSCF164 did not stimulate the proliferation of mi/mi-CMC nor induce a phenotypic change of the cells from immature mast cells to mature, CTMC-like mast cells. Immunoblotting with antiphosphotyrosine antibody showed that rrSCF164 induced considerable tyrosine phosphorylation of 145- to 165-Kd protein, the product of c-kit, in +/+-CMC, whereas tyrosine phosphorylation of the protein was barely detectable in mi/mi-CMC. Northern blot and flow cytometry analyses showed that mi/mi-CMC expressed much less c-kit at both protein and message levels than +/+-CMC. Further, mi/mi-CMC were found to differ from +/+-CMC in the expression of mouse mast cell protease-6 (MMCP-6) and MMCP-2 messenger RNA transcripts. These results suggest that the gene product of the mi locus may be important in regulating the expression of gene products such as c-kit, and that mast cell deficiency of mi/mi mice appears to be due, at least in part, to impaired signaling through the c-kit receptor because of the low c-kit expression.

Low c-kit expression of cultured mast cells of mi/mi genotype may be involved in their defective responses to fibroblasts that express the ligand for c-kit

Mutant mice of mi/mi genotype are osteopetrotic and deficient in tissue mast cells due to a defect in osteoclasts and mast cells. In an effort to further understand the mechanisms behind why mi/mi mouse-derived cultured mast cells (mi/mi-CMC) responded to interleukin-3 (IL-3), but not to the proliferative stimuli presented by fibroblasts, mi/mi-CMC and congenic normal (+/+) mouse-derived CMC (+/+-CMC), both of which expressed the phenotypic characteristics of immature mast cells, were cocultured with Swiss albino/3T3 fibroblasts in a medium containing IL- 3. In the in vitro CMC/fibroblast coculture, mi/mi-CMC did not acquire the phenotypes of connective tissue-type mast cells (CTMC), while +/+- CMC did. In addition, attachment of mi/mi-CMC to the fibroblasts was found to be significantly lower than that of +/+-CMC. Because the interaction of c-kit product with its ligand (stem cell factor [SCF]) is known to play an important role not only in proliferation and differentiation of mast cells but also in attachment of CMC to fibroblasts, the expression and function of c-kit were investigated in mi/mi-CMC and +/+-CMC. Recombinant rat SCF (rrSCF164) induced a dose- dependent proliferation of +/+-CMC. Also, rrSCF164 induced +/+-CMC to acquire the phenotypes of CTMC in the medium containing IL-3. By contrast, rrSCF164 did not stimulate the proliferation of mi/mi-CMC nor induce a phenotypic change of the cells from immature mast cells to mature, CTMC-like mast cells. Immunoblotting with antiphosphotyrosine antibody showed that rrSCF164 induced considerable tyrosine phosphorylation of 145- to 165-Kd protein, the product of c-kit, in +/+- CMC, whereas tyrosine phosphorylation of the protein was barely detectable in mi/mi-CMC. Northern blot and flow cytometry analyses showed that mi/mi-CMC expressed much less c-kit at both protein and message levels than +/+-CMC. Further, mi/mi-CMC were found to differ from +/+-CMC in the expression of mouse mast cell protease-6 (MMCP-6) and MMCP-2 messenger RNA transcripts. These results suggest that the gene product of the mi locus may be important in regulating the expression of gene products such as c-kit, and that mast cell deficiency of mi/mi mice appears to be due, at least in part, to impaired signaling through the c-kit receptor because of the low c-kit expression.

MR in renal disease: importance of cortical-medullary distinction.

The diagnostic value of MR contrast between renal cortex and medulla (CMC) as an indicator of renal disease was retrospectively studied in 51 patients (9 patients with obstructive disease, 7 with inflammatory disease, 12 with various noninfectious parenchymal medical disease, 5 with vascular disease, 2 with diffuse neoplastic disease, 7 with hemosiderosis, and 10 with renal trauma [blunt trauma and 9 postlithotripsy]). Additionally, normal kidneys from 20 control subjects were studied. On T1-weighted spin-echo images (SE 500/30), CMC was visible in all the normal kidneys (19% contrast +/- 2% SD). A decrease in or an absence of CMC on T1-weighted images (SE 500/28) was found to be a sensitive but nonspecific sign in most of the renal diseases studied. CMC was visibly preserved at normal levels in 7 of the 9 kidneys traumatized by lithotripsy and in all 4 kidneys with acute renal obstruction; CMC was above normal in kidneys with hemosiderosis. In conclusion, alteration in CMC is a sensitive but nonspecific indicator of renal disease. Furthermore, normal CMC can be seen in the presence of renal pathology.