Day :
- Clinical Pharmacology and Receptor Theory | Cardio Vascular Pharmacology | Pharmacokinetic and Pharmacodynamic | Drug Screening and Discovery | Topical Medicine and Infectious Diseases | Advances in Pharmacological Research | Biochemical Pharmacology
Location: Wien 1
Session Introduction
Gal Bitan
University of California, USA
Title: Biomarkers in brain-derived exosomes assist the diagnosis of neurodegenerative diseases
Time : 11:50-12:10
Biography:
Gal Bitan, PhD, received his PhD in organic chemistry from the Hebrew University of Jerusalem, Israel. Following postdoctoral training at Harvard Medical School and affiliated hospitals, he joined the faculty at UCLA where he is currently a Professor of Neurology. Dr. Bitan’s research program focuses on neurodegenerative diseases caused by abnormal protein self-assembly, such as Alzheimer’s and Parkinson’s diseases. He has made seminal contributions to the study of amyloid-protein oligomers and has been developing novel drug candidates and biomarker measurements for these diseases.
Abstract:
Statement of the Problem: Biomarkers for neurodegenerative diseases are urgently needed. Definite diagnosis for most diseases is possible only postmortem and the rates of misdiagnosis are high. Monitoring progression and treatment effects using clinical criteria is inefficient due to high variability. Current biomarker strategies, such as brain imaging and cerebrospinal fluid analysis have major drawbacks. An attractive alternative is analysis of biomarkers in brain-derived exosomes isolated from the blood. Methodology & Theoretical Orientation: We examined α-synuclein in neuronal and oligodendroglial exosomes as a diagnostic biomarker for distinguishing between Parkinson’s disease (PD) and multiple system atrophy (MSA). α-Synuclein deposition is found as Lewy bodies in PD and glial cytoplasmic inclusions, primarily in oligodendrocytes, in MSA. We compared cohorts of healthy control individuals, patients with PD, and patients with MSA. Findings: α- Synuclein concentration in both exosome populations were significantly higher in the two diseases than in the controls and in MSA relative to PD. The total α-synuclein levels separated MSA from control with high sensitivity and specificity, whereas the PD group separated only moderately from the other groups. However, the ratio between the α- synuclein levels in the oligodendroglial relative to the neuronal exosomes separated the two disease groups with high sensitivity and specificity. The ratio also correlated significantly with progression of motor symptoms in the PD group. Conclusion & Significance: Measurement of α-synuclein in brain-derived exosomes offers a minimally invasive means for analyzing biomarkers for PD and MSA, suggesting that in the relatively near future these two diseases could for the first time be diagnosed with high sensitivity and specificity, and their progression could be monitored, using a simple blood test.
Maria I. Yablonskaya
Research Medical University, Russian Federation
Title: The project of experimental testing of the hypothesis regarding the effect of sodium phenylbutyrate for reducing dopamine depletion in the brain in Lesch- Nyhan syndrome using new personalized genetic HPRT1-deficient mouse as a pharmacological model
Time : 12:10-12:30
Biography:
Maria I. Yablonskaya has passion in clinical genetics and especially in diagnostics and management of inherited metabolic diseases.
Abstract:
Lesch-Nyhan syndrome is an X-linked inborn error of purine metabolism which is caused by mutations in the HPRT1 gene encoding the purine recycling enzyme hypoxanthine-guanine phosphoribosyltransferase (HPTR), the prevalence is approximately 1:380000. The disease manifests during the first year of life and is characterized by uric acid overproduction and urate nephropathy combined with severe neurologic dysfunction including cognitive impairment, dystonia, choreoathetosis, spasticity and self-injurious behavior. Overproduction of uric acid is controlled well with allopurinol. But until now, there is no sufficiently effective pharmacologic therapy for neurologic dysfunction in Lesch-Nyhan syndrome. We hypothesized that HPRT deficiency leads to hyperactivation of guanine deaminase (GDA), which has the same localization and expression levels in the brain as HPRT. GDA irreversibly converts guanine to xanthine with the release of ammonia. Local excess of ammonia in brain structures triggers a cascade of pathological processes resulting in impaired transport and release of dopamine in the nigrostriatal pathway, hyperactivation of the NMDA receptors and combined hyperactivation of adenosine and dopamine receptors, neuronal insensitivity to exogenous dopamine. We offer to test the effect of ammonia binding remedy Sodium Phenylbutyrate for reducing dopamine depletion in the brain. To test this hypothesis, we created a new personalized genetic HPRT1-deficient mouse model. We used the CRISPR-Cas9 genomic editing system to introduce the deletion of 8Val in the first exon of the HPRT1 gene in the mouse model. This hemizygous mutation is the cause of Lesch-Nyhan syndrome in one of the patients observed in our clinic. Despite the fact that Hprt-deficient mice do not demonstrate a clinical complex characteristic of patients with Lesch-Nyhan syndrome, they have depletion of dopamine in the same brain structures. These models should be used in studies of brain metabolism and preclinical studies of the effectiveness of new treatments for this disease.
Galina S. Mal
Kursk State Medical University, Russia
Title: Forming statin response in patients with coronary heart disease in presence of acute respiratory viral infections by means of genetic markers
Time : 12:30-12:50
Biography:
Mal Galina Sergeevna throughout the 30 years dealing with the actual problems of cardiology, pharmacology and clinical pharmacology. In 1993 she defended her thesis and was awarded the degree of candidate of medical sciences. In 2005, defended her doctoral thesis and awarded the degree of doctor. Since 2005 she has been working as a professor of pharmacology. She is the author of 500 scientific papers. Develops issues of pharmacological correction of atherosclerosis of coronary heart disease, arterial hypertension. Studies pharmacogenetic approaches to the modification of the drug response in cardiac patients. Her approach to optimizing treatment is based on the pharmacokinetic, pharmacodynamic and pharmacogenetic aspects of the treatment of cardiac patients. That allows to implement personalized medicine in real life. She and her students present their work internationally.
Abstract:
Statement of the Problem: Development of CHD associated with atherosclerosis. One of the main pathogenetic causes of atherosclerosis development is inflammation, being an important atherogenesis component. Any acute infection may be the etiological factor which activates chronic inflammation in the atherosclerotic plaque, involving the cytokine system. A number of studies demonstrate the relation between an increase of cytokine level and the signs of atherosclerosis destabilization and CHD. The purpose of this study is to describe the drug response variability in CHD patients with an acute viral infection. Methodology & Theoretical Orientation: The study involved 170 CHD patients, 120 of whom also had infections (ARVI). The LDL-C and cholesterol levels were determined in the blood serum using an enzymatic method. Genotyping of polymorphisms IL-1β –511C>T, IL-6 –174G>C, IL-4 –589C>T, IL-10 –1082G>Ð was performed using a PCR method on the CFX96 Bio-Rad Laboratories amplifier (USA). Findings: Carriership of –511TT genotype were diagnosed with the lowest LDL-C level and a high HDL-C level (p<0.05), which confirmed the hypolipidemic statin effect. Carriers of –511СС genotype had the increased LDL-C levels. Carriership homozygous –1082GG genotype demonstrated the association with the level of Cholesterol (P=0.003). When the anti-inflammatory cytokine (IL-4, IL-10) level increased, C level decreased (P<0.05). The analysis of correlation between pro- /anti-inflammatory cytokine gene genotypes revealed the activity of genotypes –511TT (IL-1β gene), –174CC (IL-6 gene), –589TT (IL-4 gene), and –1082GG (IL-10 gene) in maintaining chronic inflammation stability (P=0.012).
Conclusion & Significance: The obtained correlations contributed to the preparation of personalized HLP pharmacotherapy algorithm in CHD patients in presence of ARVI. The presence of heterozygous –511CT genotype for –511C>T polymorphism of the IL-1β gene, homozygous –174GG genotype for –174G>C polymorphism of the IL-6 gene, and homozygous –1082AA genotype for polymorphism –1082G>A of the IL-10 gene did not lead to reaching the target LDL-C level.
Ayman Selim
October University for Modern Sciences and Arts (MSA), Egypt
Title: MicroRNA 103 inhibitor as a potential promising therapeutic target for myocardial infarction
Time : 13:40-14:00
Biography:
Abstract:
Myocardial infarction (MI) is myocardial cell death due to severe and prolonged ischemia produced from atherosclerosis-related coronary artery disease. MI triggers a cascade of events and reparative phases end with myocardial cell necrosis. MicroRNA (miR) is non-coding single stranded RNA that regulates protein expression. miR-103 is used to regulate expression of Fas-associated death domain (FADD) which decreases necroptosis of ischemic myocardium. The study aims to investigate the modulatory effect of up-regulating mRNAs translation processes of myocardial infarction induced with Isoprenaline HCL 100 mg/kg (ISO) by injecting miR-103 inhibitor. Eighteen mice (15-25 gm) were allocated into three groups; Group A (control) received normal saline, Group B received ISO and Group C received ISO and miR-103 inhibitor. Mice were sacrificed by cervical dislocation under urethane anesthesia. Blood and hearts samples were collected for biochemical analysis of miR103, FADD, receptor interacting protein kinase (RIPK), nuclear factor-kB (NF-kB), tumor necrosis factor-α (TNF-α), interleukine-6 (IL-6),Troponin-I and creatine kinase-MB (CK-MB). In addition, hearts were used for histopathological examination. Results showed that administration of miR-103 antagomir leads to increase in FADD protein levels in group C compared to A and B. While miR-103, RIPK, NF-kB, TNF-α and IL-6 showed high levels of expression in group B that is attenuated in group C. Troponin-I and CK-MB also supported the previous results. Histopathological test showed normal histological structure in groups A and C while focal degeneration in myocardium in B. Accordingly, these results indicate a promising suppression of MI manifestations upon inhibition of miR-103.
Bland Bayar
University of Duhok, Iraq
Title: MicroRNA 103 inhibitor as a potential promising therapeutic target for myocardial infarction
Time : 14:00-14:20
Biography:
Biography
Bland Bayar has is expertise in management and prevention of diabetes mellitus. He is a head of non communicable disease in Duhok city north of Iraq (Kurdistan) he is a clinician and part time lecturer at shexan polytechnic college and has many activities in prevention of non communicable and specially diabetes mellitus. This research was done to evaluate the role betatrophin and it is relation to type 2 diabetes mellitus patients.
Abstract:
Abstract
Aims: Recently, it was suggested that betatrophin has a role in controlling pancreatic b cell proliferation and lipid metabolism, however, its role in human subjects has not been established yet. The predicting role of betatrophin and MDA along with other biochemical indicators in type 2 diabetes mellitus (T2DM) in a sample of the Iraqi population was examined in the present investigation.
Methods: A total of 31 patients diagnosed with T2DM and 30 adult subjects without diabetes were matched in age and gender in a case-control study. Logistic and linear regression models were performed
to examine the role of MDA and betatrophin in T2DM and triglyceride, respectively.
Results: The study confirmed a higher concentration of LDL (124.45 vs. 102.70 mg/dL; P ¼.001) and TG (191.13 vs. 103.83 mg/dL; P < .0001), insulin (18.40 vs. 10.97 mU/mL; P < .0001), and Hs. CRP (5.39 vs. 2.80 mg/L; P ¼.033) in diabetic patients compared to the controls. No significant difference in betatrophin and MDA was found between diabetic patients and non-diabetic healthy subjects. The study
Showed triglyceride as the only predictor of T2DM (P ¼.028). Similarly, total cholesterol (P < .0001), HDL (P ¼.001), LDL (P < .0003), and MDA (P ¼.010) were shown as predictors of triglyceride in diabetic patients.
Conclusion: The present study that triglyceride is a direct and MDA is an indirect predictor for T2DM.
Samuel P.B.Drawbridge
BVetMed MRCVS, UK
Title: Finding a medical solution to calcium oxalate urolithiasis: Which agents have the best dissolution potential? An integrative review
Time : 14:20-14:40
Biography:
A practitioning veterinarian Samuel Drawbridge is very passionate about medicine, but also has a deep interest in chemistry. Pharmacology allows a combining of these two disciplines. His current research involves exploring medical solutions to calcium oxalate based urolithiasis. He hopes to develop a solution that could be used to dissolve calcium oxalate uroliths by direct irrigation of the urinary tract, as well as discovering those agents best suited for prevention of this disease. This research allowing him to improve the health and welfare of humans and animals, beyond that of working as a general practitioner.
Abstract:
Calcium urolithiasis is a disease of major concern given its high prevalence, welfare and economic implications, and complications associated with current treatment and prevention strategies. A large number of publications were evaluated in this review to determine chemicals most evidential of calcium oxalate dissolution potential, the most prevalent stone component. The relevant literature was sourced through a keyword search of several online databases, and studies included if they showed evidence of an agent exhibiting dissolution activity upon calcium oxalate powder, crystals or stones. A critical analysis of these chemicals was undertaken, to determine those most efficacious, whilst also considering safety of medical use. This evaluation revealed citrates to be the most promising candidates for future research, given in vivo and in vitro data. Other factors influencing dissolution were also considered, including the ability of the immune system to dissolve calcium oxalate crystals.
J Amin
University of South Florida, USA
Title: Orthosteric- versus allosteric-dependent activation of the GABAA receptor requires numerically distinct subunit level rearrangements
Time : 14:40-15:00
Biography:
J Amin laboratory has a primary interest in GABAA and NMDA receptor-channels. We have studied the structure/function relationship of subtypes of GABAA receptors to enhance our understanding of the molecular mechanism of action of sedative/hypnotic drugs. By co-expression of wild-type with anesthetic-sensitive subunits of GABAA receptors, we have determined the minimal number of subunits required for orthosteric- versus allosteric-dependent activation of GABAA receptor channels. The laboratory is also focused on drug discovery with particular interest in ketamine. In the last several years, we have synthesized a number of ketamine analogues and characterized their molecular actions on the NMDA and GABAA receptors. One oxime analogues of ketamine has shown great promise in terms of molecular signature on NMDA and GABAA receptors and in an animal model test for antidepressants.
Abstract:
Anesthetic molecules act on synaptic transmission via the allosteric modulation of ligand-gated chloride channels, such as hetero-oligomeric α1β2γ2 GABAA receptors. To elucidate the overall activation paradigm via allosteric versus orthosteric sites, we used highly homologous, but homooligomeric, ρ1 receptors that are contrastingly insensitive to anesthetics and respond partially to several full GABA α1β2γ2 receptor agonists. Here, we co-expressed varying ratios of RNAs encoding the wild-type and the mutated ρ1 subunits, which are anesthetic-sensitive and respond with full efficacy to partial GABA agonists, to generate distinct ensembles of receptors containing five, four, three, two, one, or zero mutated subunits. Using these experiments, we then demonstrate that, in the pentamer, three anesthetic-sensitive ρ1 subunits are needed to impart full efficacy to the partial GABA agonists. By contrast, five anesthetic-sensitive subunits are required for direct activation by anesthetics alone, and only one anesthetic-sensitive subunit is sufficient to confer the anesthetic-dependent potentiation to the GABA current. In conclusion, our data indicate that GABA and anesthetics holistically activate the GABAA ρ1 receptor through distinct subunit level rearrangements and suggest that in contrast to the global impact of GABA via orthosteric sites, the force of anesthetics through allosteric sites may not propagate to the neighboring subunits and, thus, may have only a local and limited effect on the ρ1 GABAA receptor model system.
Walid Y Tarsin
University of Tripoli, Libya
Title: Clinical benefit of training asthmatic Libyan patients on how to use metered dose inhalers by using 2Tone trainer
Time : 15:00-15:20
Biography:
Tarsin has his expertise in evaluation of drug delivery reproducibility from different inhalation products using Pharmacokinetic methods and In-vitro characterisation of inhaled products focussing on DPI and MDI. He had several Clinical trials using the inhalation profile recorder to determine the total emitted dose and the fine particle mass of different inhalers in vitro by means of inhalation simulator (The Electronic Lung). He focused on clinical trials to identify which inhaled product to prescribe to an asthmatic patient and those with Chronic Obstructive Pulmonary Disease (COPD) using the In-Check Dial.
He has built this model after years of experience in research, evaluation, teaching and administration in hospital and education institutions in the UK and Libya.
Abstract:
Bronchial asthma is a serious chronic inflammatory disease of the respiratory system. Aerosol inhalation as a route of drug delivery has become well-known in therapy of asthma. This study was aimed to evaluate if the use of 2Tone helps patients maintain the correct inhalation technique after training and can improve the clinical benefit. 125 Libyan adult asthmatic patients were engaged from Tripoli Medical Centre, 2017. At the first clinical visit; 38, 44 and 43 patients were included as C, VT and 2T groups, respectively. Their IFR through an MDI was measured using an In-Check Dial. Patients in 2T group were trained on how to use the 2Tone Trainer according to its PIL and practiced inhaling through this training aid to familiarize themselves with the different sounds according to the IFR. At the second clinic visit for all the patients was held six weeks later, each patient was assessed in the same manner as on the first visit. Results indicate a significant positive correlation between percent predicted FEV1 and PEFR with all AQLQ domains. Patients in the 2T group showed reduced IFR of about double that in VT group whereas in the C group, there was no significant difference in IFR. However, comparison of IFR between VT vs. 2T groups at visit one showed no statistical significant difference. On the other hand, at visit two, comparison between all the groups showed a highly significant difference. Thus, this study shows that 100% and 29% of the patients in the C and VT groups were inhaling at a high IFR while the 2T group shows only one patient (3%) was inhaling at the high flow rate while the rest of the patients managed to obtain the optimum IFR needed for the MDIs. Thus, the findings strongly recommend the importance of the use of the 2T device to train the patients to slow their IFR.
- Clinical Pharmacology and Receptor Theory | Cardio Vascular Pharmacology | Pharmacokinetic and Pharmacodynamic | Drug Screening and Discovery | Topical Medicine and Infectious Diseases | Advances in Pharmacological Research | Biochemical Pharmacology
Location: Wien 1
Session Introduction
Shirley Taniguchi
University of São Paulo, Brazil
Title: Pharmacological advice for clinical practice
Biography:
Shirley earned her M.S. in Pharmacology at the University of São Paulo in 1993. From 1994-1996, she worked as a researcher for the Japanese Ministry of Education in the Department of Pharmacology at the University of Kitasato in Tokyo. She has been an instructor in Pharmacology since 1997 and a researcher at the Medical School at the University of São Paulo (Faculdade de Medicina /Universidade de São Paulo). Shirley has been teaching undergraduate Pharmacology classes within Healthcare courses under the theme ‘Education to Prevent the Misuse of Drugs’.
Abstract:
Statement of the Problem: Treating drugs symptomatically, reversing drug side effects without considering the receptors involved, and combining drugs without following specific criteria, may result in inefficient attempts to resolve clinical events.
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Methodology & Theoretical Orientation: This was a retrospective survey of patients hospitalized in a large general hospital located in the city of São Paulo (Brazil) and individual patients treated at several hospitals in the region.
blockers such as phenytoin without accompanying cardiac function may
Conclusion & Significance: An individualized medical prescription should contain drugs selected based on their mechanism of action, half life, albumin binding rate, and predicted side effects. This would help reduce risks and increase the chances of therapeutic success.
Emelie Land
The University of Sydney, Australia
Title: The effects of inhaled rapamycin solid lipid particle size on transport across lung epithelial cells
Biography:
Emelie Landh completed her Bachelor in Medical Sciences, majoring in Pharmacology at the University of Sydney in 2013. She went on to complete a Graduate Diploma in pharmacology with the Respiratory Technology Group at the Woolcock Institute of Medical research at the University of Sydney in 2014. She is currently at the end of the second year of her PhD under the supervision of Dr. Hui Xin Ong with the Respiratory Technology Group. Her PhD project involves developing an inhaled combination treatment using Solid-Lipid Nanoparticles for treating Lymphangioleiomyomatosis (LAM).
Abstract:
Background:
Lymphangioleiomyomatosis (LAM) is a rare lung disease characterized by the uncontrolled growth of smooth like muscle cells (LAM cells) in the lungs that can spread to other body parts via the lymphatic system Current treatment for LAM is oral Rapamycin, which is limited by its low bioavailability (~15%) and side effects [1, 2]. It’s been shown that particles of approximately <1000nm with a negative surface charge are able to enter the lymphatic system [3].
Aim: The current study aimed to determine the optimum size of Rapamycin solid lipid nanoparticles (SLN) that will facilitate drug entry into the lymphatic system through the inhaled route in order to increase lung bioavailability, reduce systemic side effects and potentially have increased efficacy.
Methods: Three different sized (1-3) of Rapamycin-SLN: 200, 500 and 800nm, were produced by dissolving Rapamycin and glyceryl behenate in methanol and dichloromethane. The organic solvents were evaporated prior to mixing with hot Tween80 (1.5 %w/v) solution. The solution was either homogenized (1700rpm) or passed through a membrane with specified pore sizes mini-extruder before being freeze-dried overnight. Size and charge were determined using a Zetasizer. Transepithelial drug transport of the formulations was evaluated in-vitro using a Calu-3 air-liquid interface bronchial epithelial cell model.
Results: All Rapamycin-SLNs formulations had negative surface charge (table 1) and average particle sizes: 237 ± 1.8nm, 583 ± 1.3nm and 790 ± 2.3nm, respectively. The formulations showed varying encapsulation efficiencies ranging from 65.8 to 97.32%. The transport studies showed that 83 ± 4.2% and 68 ± 2.5 % of SLN200 and SLN500 formulations were transported, respectively, across the epithelium after 4hrs compared to 22 ± 2.15% of the SLN800 formulation.
Conclusion & Discussion: The current study showed that Rapamycin-SLN with negative surface charge and size of approximately 200nm is able to cross the lung epithelium faster than larger particles. Future studies will be expanded to evaluate the entry of these SLN particles into the lymphatic vessels in order to target the extra pulmonary LAM cells.
Femina Dawer
Grant Govt. Medical College and Sir J.J Hospital, India
Title: A prospective cross-sectional study to evaluate the economic burden of patients diagnosed with depression in a tertiary care hospital
Biography:
Femina Dawer a postgraduate resident in department of pharmacology, Grant Govt Medical College and Sir J.J Group of Hospitals, Mumbai, India is dedicated towards clinical research both in experimental and clinical aspects. Considering different modalities while doing a research helps in giving a wisdom to explore impact of various factors in treating a patient. With the intent of helping the population this study was conducted to explore the financial aspect and calculate the burden of the disease comparing it with international available data. Thus, helping the patients by spreading a word.
Abstract:
Abstract
Statement of the Problem: Depression is a common psychiatric disorder having important medical, social and psychological consequences. It is a disorder associated with enormous burden in terms of reduced quality of life as well as direct and indirect costs. It is a well -known fact that the majority of the economic burden of depression results from non- depression expenditures. Hence, the study was undertaken to evaluate economic burden of depression. The purpose of this study is to evaluate the cost off depression in terms of direct and indirect costs.
Methodology & Theoretical Orientation: 150 patients diagnosed with depression attending psychiatry OPD at Sir J.J. Group of Hospitals, Mumbai, fulfilling the inclusion criteria were explained about the study. Written informed consent were taken. Direct and Indirect costs were recorded in Structured Case Record Forms by interviewing the patients. Cost driving factors were identified.
Findings: Total annual direct cost was 6,378.16 INR while annual Indirect Cost was INR 16,860. Annual cost of Depression was 1NR 23,238.16/331.97 USD per patient. Total cost was 16.30% of per capita GDP 2018 among Depression patients in India. The annual economic burden of depression in India is 1.2% of GNP of India.
Conclusion & Significance: The indirect cost was almost thrice the direct costs. Hospitalisation cost and loss of working days due to depression was contributed the most to the direct costs and indirect costs respectively. Economic burden of Depression is found out to be 16.30% of per capita GDP in year 2018-2019.
Recommendation: Multi-centric studies to evaluate pharmaco-economic burden across the country and analyse the burden of the disease. Thus, shifting the approach to prevention rather treatment reducing the economic burden of the illness.
Sherri A Smith,
Relay Therapeutics, USA
Title: Pharmacokinetic and pharmacodynamic considerations for drugs binding to alpha-1-acid glycoprotein
Biography:
Sherri Smith is experienced in drug metabolism and pharmacokinetics (DMPK) of small molecules from discovery through clinical development in the pharmaceutical industry. Recent publication efforts have focused on explaining discrepancies in plasma protein binding values due to interference of plasticizers commonly used in blood collection bags, to highlight species, ontogeny, and disease state differences in expression of α-1-acid glycoprotein (AAG) and to provide examples where human PK of drugs have been impacted by preferential binding to AAG. The overall aim is to bring attention to the relevance of accurate measurement of fraction unbound for the prediction human PK and pharmacodynamics
Abstract:
Abstract
According to the free drug hypothesis only the unbound drug is available to act at physiological sites of action. Albumin, the most abundant plasma protein (~50 mg/mL), and alpha-1-acid glycoprotein (AAG, ~1 mg/mL) are both involved with drug binding and distribution. While albumin levels are similar across species, marked species, age, and disease state differences in AAG expression, homology and drug binding affinity have been reported. Drug binding to plasma proteins can help aid and improve the translation of pharmacokinetic/pharmacodynamic (PK/PD), safety margin predictions, and relationships from preclinical species to human as well as adults to neonates (Smith and Waters, 2019). The impact of AAG binding on PK has been reported for multiple drug/candidate molecules including pinometostat (Smith et al., 2016), vismodegib (Gianetti et al., 2011), imatinib (Widmer et al., 2006), and UCN-01(Fuse et al., 1998). Obtaining accurate fraction unbound (fu) values, especially for highly bound drugs, is critical to PK and safety predictions (Di et al., 2017). The role of plasticizers used in blood collection bags has recently been reported to contribute to inaccurate overestimation of fu for drugs that preferentially bind to AAG (Butler et al., 2015, Ingram et al., 2019). Experimental considerations as well as recommendations for understanding the potential impact of AAG on PK through drug discovery and early development will be reviewed.
Jun Li
The First Affiliated Hospital of Xinjiang Medical University, China
Title: Screening of kinase inhibitor library revealing lead compounds for treatment of cystic echinococcosis
Biography:
Biography
Jun Li is a professor of Xinjiang Medical University and a senior research fellow of State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asia, Xinjiang Medical University, Urumqi, China. He received her B. Sc from Xinjiang Medical University. In 2004, she obtained her PhD at the University of Queensland working on developing diagnosis tool for detecting cystic echinococcosis. She then spent 3 years working on PanBio for developing diagnosis kit for infectious diseases. From 2008-2013, she worked on molecular biology of Echinococcus as a senior research officer in Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia. She has published more than 30 papers/articles in the international journals in her research career.
Abstract:
Abstract
Aims: The metacestode stage of two Echinococcus species, E. granulosus sensu lato and E. multilocularis cause cystic echinococcosis (CE) and alveolar echinococcosis (AE), respectively. These diseases remarkably impact on the health of population. Although surgical removal of cyst is the cure treatment, about 90% of patients with echinococcal infection are treated by albendazole. However, as the drug is not parasiticidal, the patients with AE or CE have to take the drug for a long time, even for the whole life. The treatment of these diseases urgently need an effective drug.
Material and Methods: In the study, by using in vitro cultivation of E. granulosus protoscoleces and micro-cysts, we primarily screened 378 kinase inhibitors at 5 μM, which revealed 51 compounds showing killing efficacy. Further using 1 μM, 7 compounds were keeping killing efficacy in vitro. Dose-response assays revealed that 2 of the compounds, S2243 and S2895, had LC50 value below 2.5 μM. We then incubated cysts of E. granulosus collected from infected mice with S2895 and S2243 at 20 μg/L, which resulted in 60% of the cysts dead in 24 h. For in vivo efficacy trial, BALB/c mice were transferred with 50 micro-cysts and after 3 month postinfection, each of the mice was orally given these two drugs a dose of 15 mg/kg of body weight for one month. An increase in cyst mortality rate was observed compared to that of those collected from control mice.
Conclusions: Our study identifies that the two kinase inhibitors showed parasiticidal in both in vitro and in vivo, indicating these two inhibitor may be the lead-compounds for drug development against echinococcosis.
Biography:
Biography
Hesham R. El-Seedi working in the area of isolation, structure elucidation and synthesis of biologically active natural products from medicinal plants, marine and bee products. Recently, we started also a project on nanoparticles synthesis. Prof. Hesham is a former fellow of the Japanese Society of Promotion of Science (JSPS), Faculty of Science and Technology, Keio University, Japan, under direction of Prof. Shosuke Yamamura and Prof. S. Nishiyama. Throughout his carrier, he worked in pioneer internationally recognized laboratories including Geneva University, Switzerland, in collaboration with Prof. Kurt Hostettmann, Kunglia Tekniska Högskola (KTH), Stockholm, Sweden (since 2007), Faculty of Pharmacy, Uppsala Biomedical Center, Uppsala University,
Abstract:
Abstract
Statement of the Problem: According to the World Health Organization, two billion people will be aged 60 years or older by 2050. Aging is a major risk factor for a number of neurodegenerative disorders. These age-related disorders currently represent one of the most important and challenging health problems have impact on the economic and social. Therefore, much attention has been directed towards the design and development of neuroprotective agents derived from natural sources.
The honeybees (Apis mellifera L.) have several products, including honey, propolis, royal jelly, bee venom, and bee pollen. Bee products meet the criteria of being natural products that have long-recognized medicinal properties. Historically, bee products nutritional and medicinal values have been considered for thousands of years by Ancient Egyptian, Persians, Romans and Chinese in supplementary nutrition and alternative diets. Bee products are often sold as nutritional supplements and/or health products, and with potential anticancer, antimicrobial activities, antioxidant, anti-nociceptive, and anti-inflammatory. Bee products polyphenols have neuroprotective actions via quench biological reactive oxygen species that cause neurotoxicity and aging as well as the pathological deposition of misfolded proteins, such as amyloid beta.