International Journal Of Biomedical Science[JOURNAL]
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200 papers
Gene Encoding Chitinase 3-Like 1 Protein (CHI3L1) is a Putative Oncogene.
Kavsan VM, Baklaushev VP, Balynska OV … +8 more , Iershov AV, Areshkov PO, Yusubalieva GM, Grinenko NP, Victorov IV, Rymar VI, Sanson M, Chekhonin VP
Int J Biomed Sci · 2011 Sep · PMID 23675241
An important task in understanding oncogenesis is the identification of those genes whose copy number and expression increase during tumorigenesis. Previously, in an effort to identify genes which could be used as molecu...
An important task in understanding oncogenesis is the identification of those genes whose copy number and expression increase during tumorigenesis. Previously, in an effort to identify genes which could be used as molecular markers for glial tumors, we compared gene expression in glioblastoma to the normal brain cells. Among the genes with the most pronounced increased expression in tumors there was CHI3L1, encoding the secreted chitinase 3-like 1 protein (also known as HC gp-39 or YKL-40). Expression of CHI3L1 was found increased significantly in various tumors in comparison with corresponding normal tissues. Here we show that CHI3L1 can decrease the doubling time of 293 cells. We have also demonstrated that CHI3L1 allows the anchorage-independent growth in soft agar and, in addition, stable CHI3L1 expression made 293 cells tumorigenic: these cells stimulate the initiation of tumors after their xenograft transplantation into the Wistar rat brains. Thus, the overexpression of CHI3L1 is likely to be critical in the development of some tumors and when we gain more information about mechanisms of CHI3L1 oncogenicity, it could be used as one of the potential targets for anticancer therapy.
Comparison of the anti-inflammatory and analgesic effects in rats of diclofenac-sodium, felbinac and indomethacin patches.
Takayama K, Hirose A, Suda I … +4 more , Miyazaki A, Oguchi M, Onotogi M, Fotopoulos G
Int J Biomed Sci · 2011 Sep · PMID 23675240
BACKGROUND: Topically applied nonsteroidal anti-inflammatory drugs (NSAIDs) are used widely for the treatment of pain and inflammation in musculoskeletal disorders. This study compared the analgesic and anti-inflammatory...
BACKGROUND: Topically applied nonsteroidal anti-inflammatory drugs (NSAIDs) are used widely for the treatment of pain and inflammation in musculoskeletal disorders. This study compared the analgesic and anti-inflammatory effects of patches of 1% diclofenac-sodium, 3.5% and 0.5% felbinac and 3.75% indomethacin in rats using the carrageenan-induced paw pad edema model and the brewer's yeast-induced hyper algesia model. Two studies were conducted: in the preliminary study, the patch was removed at 2 or 24 hrs after application, and in the main study the patch was removed at 2 hrs. The volume of the right hind paw and the pain threshold were assessed at 1, 3, 5, and 7 hrs after induction of inflammation in both studies. RESULTS: In the main study, the edema ratio in the 1% diclofenac group at 5 hrs after induction of inflammation and the AUEC (Area Under the Effect Curve) were significantly lower than in the control animals (p=0.009). The edema suppression rate in the 1% diclofenac group (12.1-33.2%) was higher than in the 3.5% and 0.5% felbinac and 3.75% indomethacin groups. The pain threshold ratio did not decrease in the 1% diclofenac group and it was significantly higher than in the control group at 3 (p=0.0004) and 5 hrs (p=0.029). The 1/AUEC was significantly lower than that in the control group (p=0.004) and the lowest among all the NSAID groups. CONCLUSIONS: This study demonstrated that the analgesic and anti-inflammatory effects of the 1% diclofenac sodium patch in a rat model may be exerted more promptly and persistently than with the 3.5% and 0.5% felbinac and 3.75% indomethacin patches.
Audit of Pediatric ENT Injuries.
Aremu SK, Alabi BS, Segun-Busari S … +1 more , Omotoso W
Int J Biomed Sci · 2011 Sep · PMID 23675239
BACKGROUND: Ear, Nose and throat (ENT) injuries are relatively common in children. Sometimes they may result in disfigurement or dysfunction of the affected parts. This study was aimed at the pattern and mechanisms of EN...
BACKGROUND: Ear, Nose and throat (ENT) injuries are relatively common in children. Sometimes they may result in disfigurement or dysfunction of the affected parts. This study was aimed at the pattern and mechanisms of ENT injuries encountered by children in Ilorin located in north central Nigeria. It is therefore our hope that the information will go a long way to assist other African countries as well in health care plans for children. OBJECTIVES: The study was aimed at determining the pattern and causes of ENT injuries in children in Ilorin. METHODOLOGY: This was a descriptive cross sectional, prospective study of all pediatrics patients aged 15 years and below who were managed between January 2005 and December 2009 (a period of 5 years) for ENT trauma in the accident & emergency unit, wards and clinics of University of Ilorin Teaching Hospital. Most of them were treated as out-patients; a few of them needed admission for some procedures. Patients with injuries to other areas than ENT were not included in this study. The data that were analyzed included the age, sex, presenting complaints, duration of symptoms prior to presentation, diagnoses, treatments and complications. RESULTS: Two hundred and seventy-one children were studied, of which 168 (62.0%) were males and 103 (38.0%) were females. Most of the children, 97 (35.8%), were between age group of 6-10 years, 81 (29.9%) aged 5 years and below, while the rest were 11-15 years of age. Injuries due to foreign bodies in Ear, Nose and Throat accounted for 80 (29.5%) of the causes. Falls accounted for 60 (24.4%) of cases while Road Traffic Injuries (RTI), 42 (15.5%) of cases. Bleeding was the commonest presenting symptom. Most of the children, 97 (35.8%) presented within 1 hour of injury while the least, 45 (16.6%), presented more than 8 hours after the injury. 132 (48.7%) had injuries in the Ear, 117 (43.2%) in the Nose and 22 (8.1%) in the Throat. CONCLUSION: ENT injuries in pediatrics are relatively common in our environment with injuries from FB insertion/ingestion being the commonest. This is closely followed by falls. Several disabilities and morbidity may result from the trauma like anosmia, facial palsy and permanently depressed nose. These have impact on psychology of the child. For these reason close monitoring of children by parents and care-givers cannot be overemphasized. Also these injuries are avoidable causes of death and disability in children.
Maternal Gestational Dietary Fat has Minimal Effects on Serum Lipid Profiles and Hepatic Glucose Transporter 2 and No Effect on Glucokinase Expression in Neonatal Wistar Rat Offspring.
Cerf ME, Williams K, Muller CJ … +1 more , Louw J
Int J Biomed Sci · 2011 Sep · PMID 23675238
The study investigated the effects of maternal diets, varying in fat content, on lipid profiles and the expression of hepatic glucose transporter 2 (GLUT2) and glucokinase (GK) in neonatal Wistar rat offspring. Dams were...
The study investigated the effects of maternal diets, varying in fat content, on lipid profiles and the expression of hepatic glucose transporter 2 (GLUT2) and glucokinase (GK) in neonatal Wistar rat offspring. Dams were maintained on diets of 10% (control), 20% (20F), 30% (30F) and 40% (40F) fat as energy throughout gestation; daily food intakes and weekly body weights were measured. Circulating fasting glucose, insulin and glucagon concentrations were determined in dams and their neonatal offspring. In neonates, total serum triglyceride, total and individual serum fatty acid concentrations, hepatic GLUT2 and GK mRNA and protein expression were determined. In dams, overall food intake of 20F (645.50 ± 25.26 g) and 40F (716.30 ± 14.15 g) dams was reduced compared to control (1007.00 ± 44.83 g) and 30F (924.50 ± 21.16 g) dams. The 20F neonates displayed elevated blood glucose concentrations (4.63 ± 0.153 mmol/l) compared to control neonates (4.14 ± 0.112 mmol/l). In 30F neonates, serum palmitoleic acid was reduced (1.63 ± 0.21% vs. 3.56 ± 0.38%) whereas stearic acid was elevated (10.05 ± 0.40% vs. 7.40 ± 0.72%) compared to control neonates. Further, the palmitoleic acid/palmitic acid ratio was reduced in 30F neonates (0.085 ± 0.009% vs. 0.165 ± 0.020% in control neonates). The 40F neonates displayed elevated GLUT2 immunoreactivity (22.86 ± 0.760%) compared to 20F (11.46 ± 2.701%) and 30F (6.45 ± 1.759%) neonates. Gestational programming with different dietary fat proportions minimally affects lipid profiles and hepatic GLUT2 immunoreactivity in neonatal offspring.
Liquid chromatographic methods for the determination of vildagliptin in the presence of its synthetic intermediate and the simultaneous determination of pioglitazone hydrochloride and metformin hydrochloride.
El-Bagary RI, Elkady EF, Ayoub BM
Int J Biomed Sci · 2011 Sep · PMID 23675237
Two reversed-phase liquid chromatographic (RP-LC) methods are described for the determination of two binary mixtures of hypoglycemic agents. In the first method, vildagliptin (VDG) was determined in the presence of 3-ami...
Two reversed-phase liquid chromatographic (RP-LC) methods are described for the determination of two binary mixtures of hypoglycemic agents. In the first method, vildagliptin (VDG) was determined in the presence of 3-amino-1-adamantanol (AAD), a synthetic intermediate and impurity of VDG. In the second method, pioglitazone hydrochloride (PGZ) and metformin hydrochloride (MET) were simultaneously determined in their binary mixture. Chromatographic separation in the two methods was achieved on a Symmetry(®) Waters C18 column (150 mm × 4.6 mm, 5 μm). In the first mixture, isocratic elution using a mobile phase of potassium dihydrogen phosphate buffer pH (4.6) - acetonitrile - methanol (30:50:20, v/v/v) at a flow rate of 1 mL min(-1) with UV detection at 220 nm was performed. In the second method, isocratic elution based on potassium dihydrogen phosphate buffer pH (4.6) - acetonitrile (60:40, v/v) at a flow rate of 1 mL min(-1) with UV detection at 210 nm was performed. Linearity, accuracy and precision were found to be acceptable over the concentration ranges of 5-200 μg mL(-1), 0.5-3 μg mL(-1) and 10-150 μg mL(-1) for VDG, PGZ and MET, respectively. The optimized methods were validated and proved to be specific, robust, precise and accurate for the quality control of the drugs in their pharmaceutical preparations.
Clinical study of advanced glycation end products in egyptian diabetic obese and non-obese patients.
Amin MN, Mosa AA, El-Shishtawy MM
Int J Biomed Sci · 2011 Sep · PMID 23675236
Advanced glycation end products (AGEs) are complex, heterogenous molecules generated by glycation and oxidation of proteins in vivo, which are thought to markedly increase in diabetic patients. One of the recently identi...
Advanced glycation end products (AGEs) are complex, heterogenous molecules generated by glycation and oxidation of proteins in vivo, which are thought to markedly increase in diabetic patients. One of the recently identified AGEs is carboxy methyl lysine (CML), which is the main ligand of receptors for advanced glycation end products (RAGE). The present study aimed to assess the effect of obesity on such pathways in presence and absence of Type 2 diabetes mellitus. CML, soluble receptors for advanced glycation end products (sRAGE), HbA1C, lipid profile, liver function tests and kidney function tests were determined in 29 diabetic obese, 29 diabetic non-obese, 15 non-diabetic obese and 15 non-diabetic non-obese subjects. The study compared obese and non-obese subjects in presence and absence of type 2 diabetes. The results showed a significant increase in CML and a significant decrease in sRAGE in each of the diabetic obese group when compared with the diabetic non-obese group and the non-diabetic obese group when compared with the non-diabetic non-obese group. A significant positive correlation was found between CML and markers of obesity (body mass index and waist/hip ratio). These results suggest that obesity can increase CML independent of diabetes and support the reports that CML could be generated from both sugars and lipids. The present study suggests that treatment using glycation inhibitors like aminoguanidine or recombinant sRAGE will not only retard the diabetic complications, but may also have a prophylactic effect.
Interleukin-2 Functions in Anaplastic Large Cell Lymphoma Cells through Augmentation of Extracellular Signal-Regulated Kinases 1/2 Activation.
Ito M, Zhao N, Zeng Z … +3 more , Zhou X, Chang CC, Zu Y
Int J Biomed Sci · 2011 Sep · PMID 23675235
In addition to intrinsic genetic alterations, the effects of the extrinsic microenvironment also play a pathological role in cancer development. Altered chemokine/cytokine networks in the tumor microenvironment may contr...
In addition to intrinsic genetic alterations, the effects of the extrinsic microenvironment also play a pathological role in cancer development. Altered chemokine/cytokine networks in the tumor microenvironment may contribute to the dysregulation of cellular functions in cancer cells. Anaplastic large cell lymphoma (ALCL) is an aggressive T-cell lymphoma caused by abnormal expression of anaplastic lymphoma kinase due to a chromosomal translocation. Notably, ALCL cells are also characterized by high-level expression of the high-affinity IL-2 receptor subunit CD25 on the cell surface. However, whether the IL-2/IL-2 receptor functions in ALCL cells and how this signaling affects the tumor remain unclear. In this study, we treated cultured ALCL cells with exogenous IL-2 and examined changes in cellular function and signaling pathways. IL-2 stimulated cell growth and augmented activation of the extracellular signal-regulated kinases 1/2 (ERK1/2) pathway. Additionally, IL-2 enhanced lymphoma cell survival by overcoming kinase inhibitor U0126-induced growth arrest and apoptosis. Subsequently, to identify the potential source of IL-2 for lymphoma cells in vivo, we performed gene expression and immunochemical analyses. RT-PCR revealed no IL-2 gene expression in cultured ALCL cells and ruled out the possibility of an IL-2 autocrine loop. Interestingly, immunostaining of lymphoma tumor tissues showed IL-2 protein expression in background cells within tumor tissue, but not in ALCL cells. Our findings demonstrate that IL-2 signaling plays a functional role in ALCL cells, and enhances lymphoma cell survival by increasing activation of the ERK1/2 pathway.
Comparison of Two Methods for Detecting Alternative Splice Variants Using GeneChip(®) Exon Arrays.
Fan W, Stirewalt DL, Radich JP … +1 more , Zhao L
Int J Biomed Sci · 2011 Sep · PMID 23675234
The Affymetrix GeneChip Exon Array can be used to detect alternative splice variants. Microarray Detection of Alternative Splicing (MIDAS) and Partek(®) Genomics Suite (Partek(®) GS) are among the most popular analytical...
The Affymetrix GeneChip Exon Array can be used to detect alternative splice variants. Microarray Detection of Alternative Splicing (MIDAS) and Partek(®) Genomics Suite (Partek(®) GS) are among the most popular analytical methods used to analyze exon array data. While both methods utilize statistical significance for testing, MIDAS and Partek(®) GS could produce somewhat different results due to different underlying assumptions. Comparing MIDAS and Partek(®) GS is quite difficult due to their substantially different mathematical formulations and assumptions regarding alternative splice variants. For meaningful comparison, we have used the previously published generalized probe model (GPM) which encompasses both MIDAS and Partek(®) GS under different assumptions. We analyzed a colon cancer exon array data set using MIDAS, Partek(®) GS and GPM. MIDAS and Partek(®) GS produced quite different sets of genes that are considered to have alternative splice variants. Further, we found that GPM produced results similar to MIDAS as well as to Partek(®) GS under their respective assumptions. Within the GPM, we show how discoveries relating to alternative variants can be quite different due to different assumptions. MIDAS focuses on relative changes in expression values across different exons within genes and tends to be robust but less efficient. Partek(®) GS, however, uses absolute expression values of individual exons within genes and tends to be more efficient but more sensitive to the presence of outliers. From our observations, we conclude that MIDAS and Partek(®) GS produce complementary results, and discoveries from both analyses should be considered.
Genetic variation and its role in malignancy.
Talseth-Palmer BA, Scott RJ
Int J Biomed Sci · 2011 Sep · PMID 23675233
Genetic variation has long been thought associated with common complex disease and has therefore been widely studied. Genetic variation in the human genome is present in many forms and have been summarised in this review...
Genetic variation has long been thought associated with common complex disease and has therefore been widely studied. Genetic variation in the human genome is present in many forms and have been summarised in this review. The potential role of DNA damage, DNA repair and environmental influence on genetic variation in the development of cancer will be discussed, before significant genome projects are reviewed. All the various forms of genetic variation have been associated with malignancies and have been extensively studied and this is a review of the state of the field. We also discuss the road ahead in fulfilling the ultimate goal in all cancer genetic studies, which is decreasing deaths caused by cancer.
Huntington's Disease: From Mutant Huntingtin Protein to Neurotrophic Factor Therapy.
Sari Y
Int J Biomed Sci · 2011 Jun · PMID 21841917
Huntington's disease (HD) is an inherited disorder characterized by neuronal dysfunction and degeneration in striatum and cerebral cortex. Although the signaling pathways involved in HD are not yet clearly elucidated, mu...
Huntington's disease (HD) is an inherited disorder characterized by neuronal dysfunction and degeneration in striatum and cerebral cortex. Although the signaling pathways involved in HD are not yet clearly elucidated, mutant huntingtin protein is a key factor in the induction of neurodegeneration. The mutant huntingtin protein alters intracellular Ca(2+) homeostasis, disrupts intracellular trafficking and impairs gene transcription. In this review, I emphasize the effects of mutant huntingtin protein in Ca(2+) handling and transcriptional factors. Transcriptional alterations are key factors in the deficits of several proteins involved in the cellular machinery. These proteins include neurotrophic factors such as brain-derived neurotrophic factor, fibroblast growth factor, glial-cell-line-derived neurotrophic factor, ciliary neurotrophic factor and neurturin that have been suggested to restore neuronal dysfunction, improve behavioral deficits and prolong the survival in animal models of HD. An understanding of the molecular pathways involved in neurodegeneration will shed light on the choice of neurotrophic factors targeting a specific neuronal population in HD and will consequently overcome behavioral deficits.
Oxidative Stress and its Implications for Future Treatments and Management of Alzheimer Disease.
Clark TA, Lee HP, Rolston RK … +8 more , Zhu X, Marlatt MW, Castellani RJ, Nunomura A, Casadesus G, Smith MA, Lee HG, Perry G
Int J Biomed Sci · 2010 Sep · PMID 21765811
Oxidative imbalance is one of the earliest manifestations of Alzheimer disease (AD) actually preceding the classic pathology of amyloid β deposits and neurofibrillary tangles. Clinical trials examining antioxidant modula...
Oxidative imbalance is one of the earliest manifestations of Alzheimer disease (AD) actually preceding the classic pathology of amyloid β deposits and neurofibrillary tangles. Clinical trials examining antioxidant modulation by a number of global interventions show efficacy, while simple supplementation has limited benefit suggesting complexity of multiple contributing factors. In this review, we highlight new insights regarding novel approaches to understanding and treating AD based on holistic views of oxidative balance including diet.
Luteolin Regulation of Estrogen Signaling and Cell Cycle Pathway Genes in MCF-7 Human Breast Cancer Cells.
Markaverich BM, Shoulars K, Rodriguez MA
Int J Biomed Sci · 2011 · PMID 21731475
cRNA microarray and real-time PCR (qPCR) studies identified a number of Estrogen Signaling Pathway (ESP) genes (GTF2H2, NCOR1, TAF9, NRAS, NRIP1, POLR2A, DDX5, NCOA3) and Cell Cycle Pathway genes (CCNA2, PCNA, CDKN1A, CC...
cRNA microarray and real-time PCR (qPCR) studies identified a number of Estrogen Signaling Pathway (ESP) genes (GTF2H2, NCOR1, TAF9, NRAS, NRIP1, POLR2A, DDX5, NCOA3) and Cell Cycle Pathway genes (CCNA2, PCNA, CDKN1A, CCND1, PLK1) in MCF-7 breast cancer cells that are regulated by the bioflavonoid luteolin. Chromatin immunoprecipitation (ChIP) studies revealed that luteolin modified histone H4 acetylation at the PLK-1 promoter suggesting that this bioflavonoid controls gene transcription via an epigenetic mechanism involving histone H4 acetylation. These findings are consistent with the anti-estrogenic and anti-proliferative properties of luteolin in normal and malignant cells.
Immune System as a Sensory System.
Dozmorov IM, Dresser D
Int J Biomed Sci · 2010 Sep · PMID 21686066
As suggested by the well-known gestalt concept the immune system can be regarded as an integrated complex system, the functioning of which cannot be fully characterized by the behavior of its constituent elements. Simila...
As suggested by the well-known gestalt concept the immune system can be regarded as an integrated complex system, the functioning of which cannot be fully characterized by the behavior of its constituent elements. Similar approaches to the immune system in particular and sensory systems in general allows one to discern similarities and differences in the process of distinguishing informative patterns in an otherwise random background, thus initiating an appropriate and adequate response. This may lead to a new interpretation of difficulties in the comprehension of some immunological phenomena.
High Prevalence of Iron Deficiency among Educated Hospital Employees in Switzerland.
Schuepbach RA, Bestmann L, Béchir M … +2 more , Fehr J, Bachli EB
Int J Biomed Sci · 2011 Jun · PMID 23675232
Iron deficiency is known to cause symptoms such as fatigue, depression and restless legs syndrome resulting in impaired quality of life and working capacity. We sought to examine the iron status of reportedly healthy ind...
Iron deficiency is known to cause symptoms such as fatigue, depression and restless legs syndrome resulting in impaired quality of life and working capacity. We sought to examine the iron status of reportedly healthy individuals by a framed study design in 58 highly educated Swiss hospital employees and to compare the use of non invasive tests for assessing iron deficiency (ID). A structured interview was used to assess health status, nutritional intake and potential blood loss, blood counts as well as parameters proposed to diagnose iron deficiency were determined. All subjects felt well and were working at their maximum capacity. The male subjects were neither anaemic nor had decreased iron parameters however 50% (23/46) of the women had a serum ferritin of below 22 μg/L, still 33% (15/46) of the women had a ferritin value below the more stringent cut off value of 15 μg/L. In 15% (7/46) of the women we diagnosed iron deficient anaemia. Red meat consumption correlated with ferritin values as did the menstrual blood loss which was estimated by asking the amount of tampons used. Of the additionally analysed iron parameters only the percentage of hypochromic erythrocytes, soluble transferrin receptor and transferrin values were significantly correlated with ferritin and reached an AUCROC of ≥0.7 indicating good predictive tests. Nevertheless neither soluble transferrin receptor nor transferrin showed diagnostic advantages for the diagnosis of ID compared to ferritin alone or together with erythrocyte parameters. Working in a hospital environment and having access to health education does not seem to correlate with prevention of ID or ID anaemia in female hospital employees.
Pattern of paediatric neurological disorders in port harcourt, Nigeria.
Frank-Briggs AI, D Alikor EA
Int J Biomed Sci · 2011 Jun · PMID 23675231
BACKGROUND: Paediatric Neurological disorders in developing countries are very challenging. This is due to its chronicity, late presentation and unavailability of modern diagnostic facilities in developing countries like...
BACKGROUND: Paediatric Neurological disorders in developing countries are very challenging. This is due to its chronicity, late presentation and unavailability of modern diagnostic facilities in developing countries like Nigeria. Lack of these modern technology and manpower contribute significantly to increased morbidity and mortality. This study demonstrates the pattern of neurological disorders and the challenges in management in a developing country. MATERIALS AND METHOD: This was a retrospective hospital based analysis of neurological disorders seen in the Paediatric neurology unit of the University of Port Harcourt Teaching hospital, Nigeria from January 2004 to December 2009. Descriptive statistics was used to present the result. RESULT: A total of 35,473 patients were seen in the Paediatric unit. Of these 2,379 had neurological disorders. This gave a prevalence of 6.7% of Paediatric neurological disorders. There were 1,431 males and 948 females (male: female ratio of 1.51:1.0). The age ranged from 3 months to 15 years. The age group 1->5 years accounted for the most affected age group constituting 87.7%. The most frequent Paediatric neurological disorders were epilepsy (24.6%), cerebral palsy (15.4%), and central nervous system infections (9.5%). CONCLUSIONSRECOMMENDATION: Wide spectrum of neurological disorders occur in our environment. The high incidence of epilepsy and cerebral palsy suggests that effort should be geared towards educating the populace about early diagnosis and prompt management.
Simultaneous determination of norfloxacin and tinidazole binary mixture by difference spectroscopy.
Abou-Taleb NH, El-Sherbiny DT, El-Wasseef DR … +2 more , Abu El-Enin MA, El-Ashry SM
Int J Biomed Sci · 2011 Jun · PMID 23675230
A simple and rapid difference spectroscopic method was developed for the simultaneous determination of binary mixture of norfloxacin (NF) and tinidazole (TZ) without prior separation. The proposed method depends upon mea...
A simple and rapid difference spectroscopic method was developed for the simultaneous determination of binary mixture of norfloxacin (NF) and tinidazole (TZ) without prior separation. The proposed method depends upon measuring the absorbance of NF at 291.6 nm which is the zero crossing point on the difference spectra of TZ in 0.1 N NaOH vs. 0.1 N HCl. Similarly, the absorbance of TZ was measured at 344.4 nm which is the zero crossing point on the difference spectra of NF. Beer's law was obeyed in the concentration range of 2-20 and 5-50 μg/mL for NF and TZ, respectively. The lower limits of detection (LOD) of NF and TZ are 0.23 and 0.36 μg/mL, respectively, while the lower limits of quantification (LOQ) of NF and TZ were 0.70 and 1.08 μg/mL, respectively. The precision of the method was satisfactory; the maximum value of relative standard deviations did not exceed 1.5% (n=10). The accuracy, expressed as recovery is between 98.25 and 101.8% with relative error of 0.29 and 0.23 for NF and TZ, respectively. The proposed method was successfully applied for the determination of both drugs in bulk powder, laboratory prepared mixture and commercial dosage forms such as tablets without interference from the commonly encountered excipients and additives. The results obtained are in good agreement with those obtained by the reference methods.
Herbal extract of gynostemma pentaphyllum decreases hepatic glucose output in type 2 diabetic goto-kakizaki rats.
Yassin K, Huyen VT, Hoa KN … +1 more , Ostenson CG
Int J Biomed Sci · 2011 Jun · PMID 23675229
The aim of the study was to explore the effect of Gynostemma pentaphyllum (GP) extract on hepatic glucose output (HGO) in spontaneously type 2 diabetic Goto-Kakizaki (GK) rats treated orally with GP or placebo extract 16...
The aim of the study was to explore the effect of Gynostemma pentaphyllum (GP) extract on hepatic glucose output (HGO) in spontaneously type 2 diabetic Goto-Kakizaki (GK) rats treated orally with GP or placebo extract 1600 mg/kg daily, during three days or three weeks. The three-week treatment of GP, but not three-day treatment, significantly reduced plasma glucose (PG) levels from 9.8 ± 0.6 to 6.8 ± 0.4 mmol/L (p=0.027) in GK rats, whereas PG levels were not significantly decreased in the placebo rats. Glucose tolerance assessed by an intra-peritoneal glucose tolerance test was significantly improved in GP treated compared to placebo treated group (areas under the glucose curves, AUCs, from 0 to 120 min were 1150 ± 200 vs. 1761 ± 87 mmol/L; p=0.013). The glucose response in an intra-peritoneal pyruvate tolerance test from minute 15 to minute 120, the AUC (15-120) was significantly lower in the GP group (415.5 ± 68.0 vs. 641.5 ± 41.8 mmol/L; p<0.05). In liver perfusions, the AUCs for HGO during 18 min (0-18 min) were significantly decreased in GP treated rats compared with control rats (302.8 ± 36.5 vs. 423.5 ± 44.7 μmol, p<0.05). The three-week GP treatment significantly reduced the hepatic glycogen content, but not glycogen synthase activity compared to placebo group (p<0.007). In conclusion, three-week treatment of GP extract exerted anti-diabetic effect in GK rats, reducing plasma glucose levels and HGO, suggesting that GP improves the hepatic insulin sensitivity by suppressing gluconeogenesis.
In-hospital death caused by pancreatic cancer in Spain: application with a bayesian network.
Alvaro-Meca A, Gil-Prieto R, Gil de Miguel A
Int J Biomed Sci · 2011 Jun · PMID 23675228
Pancreatic cancer is one of the least common tumors (2.1%), but it remains one of the most lethal. This lethality is primarily due to late stage diagnosis in the vast majority of patients. Here we demonstrate, using a Ba...
Pancreatic cancer is one of the least common tumors (2.1%), but it remains one of the most lethal. This lethality is primarily due to late stage diagnosis in the vast majority of patients. Here we demonstrate, using a Bayesian network, that we can determine a posteriori, with a high probability of success, the probability of in-hospital death of pancreatic cancer in hospitals across Spain with information related to the type of admission, the type of procedure, the primary diagnosis or the Charlson co-morbidity index. The advantages of using a Bayesian network are that it allows us to examine multiple hypotheses and to measure the effect of the introduction of variables on our hypotheses. Being able to determine deceases in the probability of survival based on hospital admission data, such as the diagnosis resulting in the present admission or the presence of co-morbidities, could facilitate the detection of deficiencies in the patient treatment and improve hospital management. Moreover, the control of related co-morbidities may have an impact on the in-hospital deaths of these patients.
The prevalence of serum immunoglobulin g antibody to Chlamydia trachomatis in subfertile women presenting at the university of port harcourt teaching hospital, Nigeria.
Jeremiah I, Okike O, Akani C
Int J Biomed Sci · 2011 Jun · PMID 23675227
OBJECTIVES: This study was undertaken to assess the prevalence of IgG antibody to Chlamydia trachomatis in subfertile patients at the University of Port Harcourt Teaching Hospital and to determine associated factors betw...
OBJECTIVES: This study was undertaken to assess the prevalence of IgG antibody to Chlamydia trachomatis in subfertile patients at the University of Port Harcourt Teaching Hospital and to determine associated factors between this and infertility. STUDY DESIGN: This case controlled study was conducted among 100 women presenting for infertility consultation at the University of Port Harcourt Teaching Hospital. One hundred women with normal intrauterine pregnancies attending the antenatal clinic were used as controls. A questionnaire was used to obtain information on their socio-demographic data, sexual and obstetric history administered to them. 2mls of venous blood was collected, labelled and sent to the laboratory. The presence of IgG antibody to Chlamydia trachomatis was determined. Hysterosalpingography was performed on all infertile women to assess tubal patency. Data management was with SPSS 15.0 for Windows(®) statistical software. RESULTS: The mean age of the subjects was 30 ± 3.1 years, median parity 0.5 and average life time sexual partner 3.7 ± 2.8. All the participants in the study were married. 62% of subjects had tertiary education. The Chlamydia trachomatis IgG antibody prevalence in the subfertile population was 74% and 51% in the control group, P<0.001. Tubal occlusion occurred in 58 (78.4%) of cases positive for chlamydia antibody. Pelvic inflammatory disease and mucopurulent discharge were the most common presentating symptoms among Chlamydia antigen positive infertile women, P<0.001. There was an association between subfertility and the number of life time sexual partners. There was an association between subfertility and non usage of condoms. CONCLUSION: The prevalence IgG antibody to Chlamydia trachomatis was significantly higher in women with subfertility compared to women with proven fertility. There was a strong association between Chlamydia antibody positivity and tubal occlusion. In a resource-poor country such as Nigeria, enzyme immunosorbent assay for chlamydial IgG antibodies may be substituted for HSG for the detection of tubal occlusion.
Lipid Profile in Relation to Anthropometric Measurements among College Male Students in Riyadh, Saudi Arabia: A Cross-Sectional Study.
Al-Ajlan AR
Int J Biomed Sci · 2011 Jun · PMID 23675226
BACKGROUND: Anthropometric measurements can easily reflect any changes in the lipid concentration in the human body. OBJECTIVES: The present work is aimed at studying lipid profile and its relation to anthropometric meas...
BACKGROUND: Anthropometric measurements can easily reflect any changes in the lipid concentration in the human body. OBJECTIVES: The present work is aimed at studying lipid profile and its relation to anthropometric measurements in college males from Riyadh, Saudi Arabia. SUBJECTS AND METHODS: This study was conducted from September 2006 to December 2008. 333 students aged 18-35 years of Riyadh College of Health Science - male section - participated in the study. Anthropometric measurements including weight, height, waist and hip circumferences were measured. Body Mass Index (BMI) was calculated. Fasting blood sugar and lipid profile including total cholesterol (TC), Low density lipoprotein cholesterol (LDL), high density lipoprotein cholesterol (HDL) and triglycerides (TG) were estimated. Socio-demographic data were collected from a questionnaire. RESULTS: Mean TC level was 4.227 ± 0.869 mmol/l, while for LDL, HDL and TG were 2.57 ± 0.724, 1.360 ± 0.545 and 1.385 ± 0.731 mmol/l, respectively. Mean TC level did not differ significantly across weight groups except among obese patients. Mean HDL, LDL and TG did not differ significantly among different groups at 5% level of significance. There was positive, statistically non-significant correlation between age and BMI. The correlation between age and all lipid parameters were statistically non-significant. There was positive correlation between BMI and TC and LDL, while there was a negative correlation between BMI and HDL. There was no correlation between BMI and triglycerides. CONCLUSION: BMI, waist and hip circumferences all increase with age. The level of TC, LDL and TG go high with increase in age and BMI.
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