1.
Toxicology Secrets
by Ling Louis J | FACMT, Richard F. Clark MD FACEP | MD, Timothy Erickson | DABAT, John H. Trestrail III RPh FAACT.
Edition: 1st ed.Material type: Publisher: New Delhi: Hanley & Belfus, 2001Availability: Items available for loan: UVAS Library [Call number: 615.9 Ling 17122 1st 2001 Pharmacology] (1).
2.
Proteomic And Genomic Analysis Of Methicillin-Resistant Staphylococcus Aureus And Efficacy Of Indigenous Medicinal Plants Essential Oils
by Sarwat Ali Raja | Prof. Dr. Muhammad Ashraf | Dr. Tayyaba Ijaz | Dr. Aqeel Javeed | Prof. Dr. Aftab Ahmed Anjum.
Material type: ; Literary form:
not fiction
Publisher: 2015Dissertation note: A Cohort study (prospective and observational) was performed to study the prevalence of Methicillin resistant Staphylococcus aureus from the healthy individuals of community, hospitalized patients and associated health-care workers and indigenous plants essential oils were screened as new, improved & potent antibacterial/s against resistant strains of MRSA.
The method involved isolation and identification of MRSA from surgical wounds of hospitalized patients & associated health care workers in a tertiary care hospital in Lahore and healthy volunteers from the community. Plant essentials oils & extracts were evaluated for their antibacterial activity against selected MRSA isolates. Oils were recovered by steam distillation using an all-glass distillation assembly. Then in vitro sensitivity and MICs of plant essential oils were determined using vancomycin and linezolid as commercial standards. The essential oils were screened further for the active constituents by column chromatography using various solvents and identification of compounds were performed by GC/MS analysis and the fractions which showed prompt results were evaluated for antimicrobial activity against the MRSA isolates in quest to find new therapeutic options. Finally effective essential oils and their active fractions were studied for their toxicity using in vitro Genotoxic assays such as Ames and Comet assays. To further ensure their beneficial effects antimutagenic effect of the essential oils were also studied.
Prevalence of S. aureus among patients was 52.9%, in HCWs 86.5% and in community 74% with an overall percentage of 72.6%. Among S. aureus those declared as MRSA were 91.8% from patients, 50.6% from HCWs and 59.5% from community with an overall percentage of 62.2% MRSA. Among the isolated MRSA overall 90.6% were Coagulase positive and 75.2% were biofilm positive.
SUMMARY
211
The pattern of MRSA resistance against current antibiotics have shown an overall increase in the resistance with maximum shown for lincomycin followed by tetracycline, ampicillin, fusidic acid, amoxicillin and piperacillin with tazobactam. The most effective options among current regime were tigecyclin, amikacin and meropenem showing an overall least resistance. Resistance against linezolid was observed with an overall percentage of 25.6 % and vancomycin 33.3% by disc diffusion method.
The MRSA isolates resistant to one or more groups of antibiotics were declared as MDRs. Among patients and health-care workers all were declared as MDRs where as in community 93.1% isolates were MDRs.
Upon Protein profiling using whole cell proteins 44 bands of the polypeptides were produced with molecular size 10-200kDa from the three sampling groups and were categorized into 5 clusters showing an overall significance correlation with each other explaining an interesting fact that all these strains were interlinked establishing the fact of flow of hospital acquired MRSA in the community and vice versa. This analysis also gave an insight in explaining the fact of horizontal transmission of infection within the hospital.
Keeping in view the raise in resistance among current available antibiotics indigenous medicinal plants essential oils were screened for active constituents exhibiting anti-bacterial effects against MRSA isolates.
Maximum yield was obtained from Carum copticum followed by Cuminum cyminum and minimum yield was obtained in case of Zingiber officinale. Upon qualitative analysis of all five essential oils Carum copticum essential oil showed zones of inhibition greater than the standards vancomycin and linezolid followed Cuminum cyminum and Zingiber officinale in all three
SUMMARY
212
sampling groups. Anethum sowa and Myristica fragrans essential oils showed no activity against MRSA.
Minimum inhibitory concentration of the three essential oils determined by micro broth dilution method indicated that Carum copticum showed least value in all three types of MRSA isolates followed by Zingiber officinale and Cuminum cyminum.
Effective essential oils were further fractioned using silica gel gravity columns. All the fractions obtained were screened for the anti-bacterial activity against all three types of MRSA isolates. Only fraction F1 of Carum copticum showed activity greater than pure essential oil and the two commercial standards of vancomycin and linezolid.
For the identification of active constituents GC/MS analysis was performed on all three essential oils and their respective fractions. In case of fraction F1 the most dominant constituents were Carvacrol, p-Cymene, Ʈ-Terpinene and Apiol. In other two plants none of the fractions were effective. Therefore it was concluded to use pure essential oils in case of Zingiber officinale and Cuminum cyminum rather than their individual fractions and incase of Carum copticum Fraction F1 has shown superior activity.
Finally these essential oils were tested for possible mutagenic effect using bacterial reversion mutation assay and Comet assay. No mutagenic effects were observed at MIC and above doses. These effective essential oils were also evaluated for possible antimutagenic effect. Both Carum copticum and Zingiber officinale essential oils showed strong antimutagenic effects and weak antimutagenic effect by Cuminum cyminum. Upon analysis of nuclear damage none of the plants essential oils and fraction F1 of Carum copticum showed genotoxic effects and indicated to be safe. Thus from the study it was concluded that Carum copticum essential oil and its fraction F1 were the most effective to be further investigated as an alternative treatment for MRSA infections. Availability: Items available for loan: UVAS Library [Call number: 2410-T] (1).
3.
Evaluation Of Antiviral Activity And Embryonic Toxicity Of Momordica Charantia Against Newcastle Disease Virus
by Muhammad Usman Ahmed (2013-VA-565) | Dr. Muhammad Adil Rasheed | Dr. Aqeel Javeed | Dr. Imran Altaf.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Plant products play a vital role in the management of various ailments due to their therapeutic activity. A wide range of active phytochemicals peptides have been found to have therapeutic uses against various functionally and genetically diverse viruses. Newcastle disease virus causes respiratory diseases in humans, birds and other mammals, representing one of the foremost threats to public health.
In this study, the antiviral activity of Momordica charantia L. and Ribavirin against Newcastle disease virus was evaluated in-ovo. For each extract of the plant M. charantia and ribavirin 40 embryonated eggs were assigned to 8 groups containing 5 eggs in each group (six groups for antiviral, six groups for embryonic toxicity, and two groups were kept positive and negative control respectively) and marked them with lead pencil. The aqueous and ethanolic extracts of Momordica charantia L. was prepared by using soxhlet extraction technique. From the extract, six different dilutions i.e. 160mg/ml, 80mg/ml, 40mg/ml, 20mg/ml, 10mg/ml and 5mg/ml of the aqueous and ethanolic extracts were prepared in normal saline whereas; six different dilutions i.e. 15μg/ml, 20μg/ml, 25μg/ml, 30μg/ml, 35μg/ml and 40μg/ml of ribavirin were made in normal saline.
With ND virus the different concentrations of the extracts of plant were mixed and 0.2 ml of this suspension was injected to 9th to 10th day embryonated eggs along with positive and negative controls having only virus and normal saline correspondingly. Ribavirin, standard drug, was inoculated by following the mentioned manner. These inoculated embryonated chicken eggs were incubated at 370C and were checked after 12 – 72 hours. After 72 hours of post inoculation, all the eggs were chilled at 40C in fridge for overnight stretch of time and the allantoic fluid was collected.
Summary
64
The embryo survival percentage, positive or negative spot haemagglutination activity and determination of virus titre by haemagglutination test confirmed the antiviral activity. The embryonic toxicity effects of Momordica charnatia aqueous and ethanolic extracts and ribavirin was assessed by merely inoculating the extracts of respective concentrations as used for antiviral activity in embryonated chicken eggs and incubating for 72 hours. The outcomes were analyzed by ANOVA by means of SPSS. Availability: Items available for loan: UVAS Library [Call number: 2384-T] (1).
4.
Evaluation Of Immunomodulatory Activity Of Ketorolac In Mice
by Mahtab Anwer (2013-VA-846) | Dr. Aqeel Javeed | Dr. Muhammad Ovais Omer | Dr. Aamir Ghafoor.
Material type: ; Literary form:
not fiction
Publisher: 2015Dissertation note: Ketorolac is one of the non-steroidal anti-inflammatory drugs (NSAIDs) commonly prescribed to treat postoperative pain and reduced stress response.The present study was designed to evaluate the immunomodulatory activity of ketorolac.In each assay, 25 mice were used. All the mice were divided randomly into 5 groups. Each group had 5 mice. Negative control group was treated with solvent, positive control group was treated with cyclophosphamide and other three groups were injected intraperitoneally at the three different doses of ketorolac (2mg/kg, 4mg/kg and 8mg/kg). Delayed type hypersensitivity assay (DTH) and cyclophosphamide induced neutropenia assays were performed to evaluate the cell-mediated immune activity of ketorolac. While, the effect of ketorolac on humoral immunity was determined by performing heamagglutination assay and mice lethality test.It was observed that significant reduction in skin thickness and white blood cells and neutropenia in dose dependent manner of ketorolac treated groups (8mg/kg ketorolac > 4mg/kg ketorolac > 2mg/kg ketorolac).Significant reduction in HAtiter values in dose dependent manner of ketorolac treated groups were also evaluated (8mg/kg ketorolac >4mg/kg ketorolac >2mg/kg ketorolac).In mice lethality assay, mortality ratio was maximum in 8mg/kg ketorolac treated group which was 100%. In 4mg/kg ketorolac group and positive control group showed the 80% mortality and 2mg/kg ketorolac treated group showed the 40% mortality. Minimum mortality was observed in negative control group. From these results, ketorolac exhibited the immunosuppressive effect. This study may have potential impacts of ketorolac in clinical applications besides its analgesic and anti -inflammatory properties. Availability: Items available for loan: UVAS Library [Call number: 2441-T] (1).
5.
Veterinary Pharmacology & Toxicology / 6th ed
by Roy,B.k.
Edition: 6thMaterial type: ; Literary form:
not fiction
Publisher: India: Kalyani Publishers; 2015Availability: Items available for loan: UVAS Library [Call number: 636.0895 Roy 31374 6th 2015 Pharmacology] (1).
6.
Katzung & Trevor's Pharmacology Examination and Board Review / 11th ed
by Trevor, Anthony J | Katzung, Bertman G | Kruidering-Hall, Marieke.
Edition: 11th ed.Material type: ; Literary form:
not fiction
Publisher: USA: Mcgraw Hill; 2015Availability: Items available for loan: UVAS Library [Call number: 6396.0895 Trevor 31399 11th Pharmacology] (2).
7.
Evaluation Of Antibacterial Activity Of Ciprofloxacin Alone And In Combination With Diclofenac Sodium Against Different Pathogenic Bacteria
by Mehwish Khan (2014-VA-816) | Dr. Muhammad Adil Rasheed | Dr. Muhammad Ovais Omer | Dr. Muhammad Nawaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: Antibiotic resistance is an international public health problem as a result of an excessive and indiscriminate antibiotics usage, which has resulted in emergence of MDR microorganisms. This study is designed for the evaluation of antibacterial activity of different dilutions of Diclofenac sodium alone and in combination with Ciprofloxacin by using well diffusion method against bacterial pathogens to improve the quality of life of patients and minimize the chances of infections.
Different dilutions of Diclofenac sodium alone and in combination with Ciprofloxacin were checked for antibacterial activity againstEscherichia coli, Staphylococcus aureus, Klebseilla pneumonia and Salmonella enterica. Three isolates of each bacterium were obtained from Microbiology department, University of Veterinary and Animal sciences, Lahore. The pathogens were tested for their sensitivity to ciprofloxacin, amoxicillin and azithromycin. The sensitivity was checked by disc diffusion method. Their zones of inhibition was measured in mm and compared with the CLSI standards. All the available bacteria were sensitive to ciprofloxacin.
Well diffusion method was used to measure the antibacterial activity of ciprofloxacin. For this purpose, 100 µg of ciprofloxacin was used and three concentrations of 100µg, 200µg and 300µg of diclofenac sodium were used. Diclofenac sodium when used with the ciprofloxacin in higher concentrations, it caused the increase in the zone of inhibition significantly among all the bacteria. Maximum antibacterial activity of drugs combination was seen with E.coliamong all the bacteria.Synergism between diclofenac sodium and ciprofloxacin was found to be statistically significant (P ≤ 0.01) when compared with the individual effects of the ciprofloxacin
Collected data was analyzed by using statistic package for social sciences (SPSS, windows version, Chicago, IL, USA). Analysis of Variance (ANOVA) and descriptive statistics was appliedusing graphpad prism 5.03.
This study indicates that Diclofenac sodium in combination with Ciprofloxacin against Escherichia coli,Staphylococcusaureus, Klebseilla pneumonia and Salmonella entericamay be effective and used as a synergistic combination to achieve more effective outcomes for disease management. This can be experimented further to evaluate these effects and prove to be major leap towards the increasing antibacterial resistance globally.
Availability: Items available for loan: UVAS Library [Call number: 2569-T] (1).
8.
Evaluation Of Antiviral Activity Of Opuntia Delliniand Carica Papayaagainst Newcastle Disease Virus
by Rizwan Aslam Rai (2008-VA-578) | Dr. Aqeel Javeed | Dr. Habib-ur-Rehman | Dr. Qamar Niaz.
Material type: ; Literary form:
not fiction
Publisher: 2016Dissertation note: This Study was designed to find out the antiviral activity of Opuntia dellini and Carica
papaya against Newcastle disease virus.
In this study three different concentrations(2%,4% and 8%) of aquous extracts of fresh leaves of Opuntia dellini andCarica papaya leaves were evaluated for their antiviral activity by injecting into 10 days old live embryonated broiler chicken eggs, through chorioallantoic sac route. For each drug (Opuntia dellini and Carica papaya), embryonated eggs were treated with three different concentrations to evaluate toxicity and to check the antiviral efficacy. Embryonated eggs were treated with the suspensions of three different concentration of drug with 4HA titer ofNewcastle disease virus(NDV)
In case of Opuntia delliniiall the three concentrations used were non toxic for embryos but antiviral effect was observed only by 4gm and 8gm/100ml concentrations of the respective extracts of respective plant.Carica papaya leaves extract, 2gm, 4gm and 8gm/100ml were failed to check viral replication, but were not lethal for chicken embryos.
Thewhole data contained constant values so only descriptive statistics was applied to evaluate results and for comparison studies.
So it is concluded that Both plants are non toxic for embyonated chick eggs as all embyos were alive in groups C1,C2 and C3, whileOpuntia dellinishowed antiviral effect against NDV at 4 gm and 8 gm/100ml doses as all embryos remained alive in groups, D1,D2, D3.Whereas Carica papaya extract could not show antiviral effect as embryos died in their respective groups D1, D2, and D3. As outcome it investigated that Opuntia dellini can be used in poultry flocks to avoid Newcastle disease.
Availability: Items available for loan: UVAS Library [Call number: 2761-T] (1).
