DETERMINATION OF VINDOLINE AND RUTIN CONTENT IN FIVE DIFFERENT MORPHOTYPES OF CATHARANTHUS ROSEUS LEAVES USING HPLC

Objective: To determine total phenolic and flavonoids contents and also quantify vindoline and rutin in different morphotypes of Catharanthus roseus using High-performance liquid chromatography (HPLC) method. Methods: Total flavonoids content (TFC) was determined by Aluminium chloride colorimetric and total phenolic content (TPC) was estimated by Folin-Ciocalteu reagent assay. The chromatographic separation was done by using a C18 column at room temperature and eluted with a mobile phase consisting of a mixture of phosphate buffer (pH=5.8) and acetonitrile at a flow rate of 1.0 ml/minute and detection was carried out at 254 nm. Results: TPC and TFC content was found highest in Cr00DP and lowest in Cr00WFSRE. Results also showed that the purple morphotypes Cr00DP gives more vindoline (0.3 mg/g) and rutin (18.57 mg/g) concentration compared to the pink morphotype Cr00PFRE contained 18.3 mg/g rutin and 0.2 mg/g vindoline. White morphotypes contained 0.383 mg/g rutin and 0.004 mg/g vindoline which was significantly less as compared to purple and pink morphotypes. Conclusion: The plant has significant number of alkaloids and flavonoids. The obtained outcomes from different morphotypes are thus significant for the purpose of vindoline and rutin isolation from Catharanthus roseus plant. These isolated bioactive phytoconstituents are a good candidate for further pharmacological and clinical study

GAS CHROMATOGRAPHY-MASS SPECTROMETRIC ANALYSIS AND IDENTIFICATION OF BIOACTIVE CONSTITUENTS OF CATHARANTHUS ROSEUS AND ITS ANTIOXIDANT ACTIVITY

Objective: The main objectives of this study were analysis of the phytochemicals produced by two different Catharanthus roseus morphotypes, i.e., pink and white flowered and evaluate it morphologically and phytochemically in terms of total phenolic content (TPC), total flavonoid content (TFC), antioxidant properties, and gas chromatography-mass spectrometry (GC-MS) analysis. Methods: Methanolic extracts of both morphotypes were prepared by Soxhlet apparatus. After extraction, the extracts were filtered and solvent removed by rotatory evaporator. TPC was determined by Folin–Ciocalteu reagent method and TFC was estimated by aluminum chloride colorimetric method. Antioxidant and free radical scavenging activities were estimated by superoxide dismutase and 1,1-diphenyl-2-picrylhydrazyl assay. GC-MS analysis was performed at Central Instrumentation Laboratory/ SAIF, Panjab University, Chandigarh.  Results: Pink-flowered C. roseus showed highest activities in terms of TPC, TFC, and antioxidant activity as compared to white-flowered C. roseus. 42 different bioactive compounds were detected in the methanolic extract of pink, while only 7 compounds were identified in white-flowered C. roseus. The identification was performed by GS-MS analysis mainly based on retention time, peak area, molecular formula, and molecular weight. Conclusion: The finding indicated that the pink-flowered C. roseus was phytochemically superior then the white one

Association between rheumatoid arthritis and periodontitis in an adult population - A cross sectional study

This investigation was aimed to analyse the existence of an association between rheumatoid arthritis and periodontitis among Indian subjects. Material and Methods: This observational study included a total of 110 individuals between 18-78 y

Structural Insight of Dopamine β-Hydroxylase, a Drug Target for Complex Traits, and Functional Significance of Exonic Single Nucleotide Polymorphisms

Human dopamine β-hydroxylase (DBH) is an important therapeutic target for complex traits. Several single nucleotide polymorphisms (SNPs) have also been identified in DBH with potential adverse physiological effect. However, difficulty in obtaining diffractable crystals and lack of a suitable template for modeling the protein has ensured that neither crystallographic three-dimensional structure nor computational model for the enzyme is available to aid rational drug design, prediction of functional significance of SNPs or analytical protein engineering. model of human DBH. The model provides structural insight into the active site, metal coordination, subunit interface, substrate recognition and inhibitor binding. It reveals that DOMON domain potentially promotes tetramerization, while substrate dopamine and a potential therapeutic inhibitor nepicastat are stabilized in the active site through multiple hydrogen bonding. Functional significance of several exonic SNPs could be described from a structural analysis of the model. The model confirms that SNP resulting in Ala318Ser or Leu317Pro mutation may not influence enzyme activity, while Gly482Arg might actually do so being in the proximity of the active site. Arg549Cys may cause abnormal oligomerization through non-native disulfide bond formation. Other SNPs like Glu181, Glu250, Lys239 and Asp290 could potentially inhibit tetramerization thus affecting function. prediction. Preliminary physicochemical tests validated the model. The model confirms, rationalizes and provides structural basis for several biochemical data and claims testable hypotheses regarding function. It provides a reasonable template for drug design as well

Study of vertical transmission of COVID-19 infection in COVID-19 positive obstetrical patients by comparing amniotic fluid and immediate neonatal COVID-19 RT-PCR

Background: The objective of this study was to estimate the incidence of vertical transmission COVID-19 by RT-PCR.Methods: In this hospital based prospective study, all COVID-19 positive pregnant women admitted in COVID ward in Muzaffarnagar medical college and hospital from April 2020 to January 2021 were included. A detailed history and examination was done and all routine investigations were done as per protocol. Samples were taken from amniotic fluid during vaginal delivery or caesarean section and collected in viral transport medium. Sample were also collected as nasal and oropharyngeal swab from neonate immediately after birth and sent for COVID 19 RT-PCR.Results: Out of total 50 cases; 43 (86%) neonates were delivered via LSCS and 7 (14%) by normal delivery, out of these 41 (82%) neonates were normal; 4 (8%) were IUGR, 2 (4%) were IUD, 2 (4%) were pre-term and 1 (2%) neonatal death. All 50 amniotic fluid as well as nasal and oropharyngeal samples of all neonates were negative by RT-PCR.Conclusions: Low vertical transmission may be due to the fact that antibodies are produced by mother that crosses the placenta and saves the fetus or there are highly specific immunological mediators in the placenta that do not allow the infection to pass to the fetus

The Band Gap in Silicon Nanocrystallites

The gap in semiconductor nanocrystallites has been extensively studied both theoretically and experimentally over the last two decades. We have compared a recent ``state-of-the-art'' theoretical calculation with a recent ``state-of-the-art'' experimental observation of the gap in Si nanocrystallite. We find that the two are in substantial disagreement, with the disagreement being more pronounced at smaller sizes. Theoretical calculations appear to over-estimate the gap. Recognizing that the experimental observations are for a distribution of crystallite sizes, we proffer a phenomenological model to reconcile the theory with the experiment. We suggest that similar considerations must dictate comparisons between the theory and experiment vis-a-vis other properties such as radiative rate, decay constant, absorption coefficient, etc.Comment: 5 pages, latex, 2 figures. (Submitted Physical Review B

A review on analytical method validation and its regulatory perspectives

Analytical methods plays vital role in the process of identification, separation and then quantification of chemical components in natural materials or synthetic materials based on their chemistry. The main purpose of the analytical method development and validation is to prove that proposed analytical method is accurate, specific, precise and robust in the pharmaceutical industry for analysis of a drug moiety. Analytical method development gives important information in the pharmaceutical industry, on the potency of a drug, the drug’s bioavailability, the drug’s stability and also its effects. The analytical method validation is essential for analytical method development and tested for specificity, linearity, accuracy, precision, range, detection limit, quantitation limit and robustness. In summary, analytical method development and validation confirms that an accurate, precise and reliable potency measurement of a pharmaceutical preparation can be performed. Keywords: HPLC, HPTLC, UPLC, GC, MS, SO

Gamma radiation induced variations in corn marigold (Glebionis segetum) and their RAPD-based genetic relationship

The present investigation was conducted during the kharif season of 2010-2012 to study hormesis, morphological and biochemical attributes associated with mutation and purification of novel types in corn marigold. The seeds of Glebionis segetum were treated with gamma rays (Source 60Co) at the dose of 20, 40, 60, 80 and 100 Gy were sown in the field along with control (un-irradiated seeds). Low doses of gamma irradiation resulted in hormesis and induced encouraging novelties, while the higher doses induced higher degree of abnormalities which led to mortality. The M2 seeds were sown to observe their characters and mutants in each population. Five promising mutants, viz. S1-S3 at 20 Gy and S4-S5 at 40 Gy gamma irradiation treatments were tagged, screened and checked for stability of characters for genetic study and possible uses of the traits. RAPD molecular marker technique was used for the study of genetic divergence and establishment of distinctiveness or similarity between the mutants developed as a result of mutagenic treatment

AN UPDATED REVIEW ON MODIFIED RELEASE TABLETS

For some time now modified drug release has been studied and used extensively during the development of pharmaceutical drug products because of its advantages over immediate release formulations. As per the forecasting by Global Business Intelligence (GBI) research, the growth in oral drug delivery market will uplift in the coming years. Modified release drug products allow at least a two-fold reduction in dosing when compared to a drug that is presented in a conventional immediate release form. Modified release drug products are designed to release active pharmaceutical ingredient over a longer duration of time; At least, longer than an immediate release (I.R) formulation. Many Pharmaceutical companies also utilize the proprietary advantages of Modified release formulations to extend the patent life cycle of commercial products thereby bringing in new business. Keywords: Immediate release (I.R), Modified release (M.R), Novel drug delivery systems (NDDS), Loading doze (LD), Maintenance doze (MD), New Drug Application (NDA