This work is done in IIT-M (Indian Institute of Technology- Madras) with help of Indian Academy of Science during June 2011-Oct 2011 under Dr Karunagaran Devarajan sir
INTRODUCTION
ROLE IN CELL LINE CHARACTERIZATION
CAUSES OF TRANSFORMATION
METHODS OF TRANSFECTION
CHARACTERISTICS OF TRAANSFORMED CELLS
GENETIC INSTABILITY
IMMORTALIZATION
ABRERANT GROWTH CONTROL
TUMORIGENECITY
CHROMOSOMAL ABERATION
APPLICATION
CONCLUSION
REFERENCE
INTRODUCTION
ROLE IN CELL LINE CHARACTERIZATION
CAUSES OF TRANSFORMATION
METHODS OF TRANSFECTION
CHARACTERISTICS OF TRAANSFORMED CELLS
GENETIC INSTABILITY
IMMORTALIZATION
ABRERANT GROWTH CONTROL
TUMORIGENECITY
CHROMOSOMAL ABERATION
APPLICATION
CONCLUSION
REFERENCE
In the field of biotechnology there are many industrial applications that result in biotech products that we use everyday at home. Some of these are food science applications that utilize enzymes to produce or make improvements in the quality of different foods. In the dairy industry, some enzymes are required for the production of cheeses, yogurt and other dairy products, while others are used in a more specialized fashion to improve texture or flavour.
Isolation and Purification of Enzymes
Enzymes are unstable molecules with a definite physico chemical organization. Even a slight change in this organization reduces the activity of enzyme and sometimes the enzyme is totally inactivated.
Therefore, the enzymes have to be isolated under controlled conditions of pH, ionic strength and temperature. Since they are proteinaceous in nature, standard extraction and purification procedures for enzymes are the same as those used for proteins except that the activity of the enzyme is assayed at each of the following four steps of extraction and purification.
Purification of Enzymes - Enzyme purification involves three steps, electrophoresis. These three techniques described in the following text
1.Dialysis
2.Chromatography.
This presentation covers the introduction to Insect Cell Culture. Also covers its general information about cell culture practices followed in the lab. It covers culture media, the source of cells for culture and examples of the cell line with their culture conditions.
Introduction.
Properties of Stem Cells.
Key Research events.
Embryonic Stem Cell.
Stem cell Cultivation.
Stem cells are central to three processes in an organism.
Research & Clinical Application of stem cell.
Research patents.
Conclusion.
Reference.
In the field of biotechnology there are many industrial applications that result in biotech products that we use everyday at home. Some of these are food science applications that utilize enzymes to produce or make improvements in the quality of different foods. In the dairy industry, some enzymes are required for the production of cheeses, yogurt and other dairy products, while others are used in a more specialized fashion to improve texture or flavour.
Isolation and Purification of Enzymes
Enzymes are unstable molecules with a definite physico chemical organization. Even a slight change in this organization reduces the activity of enzyme and sometimes the enzyme is totally inactivated.
Therefore, the enzymes have to be isolated under controlled conditions of pH, ionic strength and temperature. Since they are proteinaceous in nature, standard extraction and purification procedures for enzymes are the same as those used for proteins except that the activity of the enzyme is assayed at each of the following four steps of extraction and purification.
Purification of Enzymes - Enzyme purification involves three steps, electrophoresis. These three techniques described in the following text
1.Dialysis
2.Chromatography.
This presentation covers the introduction to Insect Cell Culture. Also covers its general information about cell culture practices followed in the lab. It covers culture media, the source of cells for culture and examples of the cell line with their culture conditions.
Introduction.
Properties of Stem Cells.
Key Research events.
Embryonic Stem Cell.
Stem cell Cultivation.
Stem cells are central to three processes in an organism.
Research & Clinical Application of stem cell.
Research patents.
Conclusion.
Reference.
An Integrated Approach To Drug Discovery Using Parallel SynthesisGraham Smith
An Integrated Approach To Drug Discovery Using Parallel Synthesis. The history of parallel chemistry for lead discovery at Pfizer Sandwich from begining to outsourcing
Assay of adsorbed diptheria vaccine and adsorbed tetanusRAGHAV DOGRA
diphtheria and tetanus vaccine, assay method, lethal dose method, Method A. challenge toxins in the guinea pig, Method B. challenge toxins in mice, Determination of antibodies in the guinea pig, guidelines .
Anoxia presentation during the AI symposium in Taiwan, March 2015Harm Kiezebrink
During the Symposium on managing outbreaks of Avian Influenza in Taiwan, the main subject was managing the outbreaks without breaching animal welfare during the culling operations. Although it seams impossible, this can be done using the Anoxia method (see also www.N2GF.com for more information), under the condition that the entire process is been taking into account: killing of animals, carcass disposal, transport & logistic, Occupational Health & Safety, environmental issues, pest control, contact between animals and humans: all these factors contribute to the risks of spreading. If one factor fails, the virus can escape and infect the next flock, making it needed to kill more birds. For that reason, all factors are equally important to maintain animal welfare during outbreak situations.
In a number of recently published studies, Professor Stegeman (University of Utrecht, Holland) explains that serologic spreading of viruses is related to human contacts with contaminated infected animals, carcasses, manure and materials infected/suspected animals; movements of farm labourers, products, equipment etc. Most of these contacts (and movements) take place prior, during, and after the culling procedure, whereas the quantity and the intensity of the contacts - thus this human contact/materials are decisive factors for the serologic spreading of viruses to enter farms and most likely play an important role in spreading between farms. Suspicion/infection of farm animals inevitably leads to preventive culling of all farm animals within the direct proximity. For that reason, the serologic spread of viruses has become a major animal welfare indicator that has to be taken into consideration as such.
Each culling procedure features its own unique contact pattern between animals and humans and is based on applied culling, disposal and transport technique. These contact patterns related to the specific combination of applied methods, defines the major contribution factors for spreading of infections. Therefore should the potential risks of these procedures be evaluated and rated on the art and the intensity of the potential contact between animals and humans/materials, prior, during and after the procedure.
Therefore, the entire procedure of killing, disposal and transportation is therefore considered as Major Interest, in terms of animal welfare.
This is the 3th presentation of a series of documents, presented during the conference on the application of the Anoxia method for euthanizing animals. The conference is held in Canberra (Australia) on February 21, 2014. The conference is organized by Anoxiatec Pty for representatives of animal welfare organizations, Australian animal health authorities and the industry and gives an overview of more scientific based information on the Anoxia method.
Back Rapid lead compounds discovery through high-throughput screeningrita martin
High-throughput screening process are used by today most of the drug discovery industries, this process helps pharmaceutical researches to make drug discovery process faster and also increase the quality and quantity of drugs production. This process in combination with robotics, data processing and control software, liquid handling devices and sensitive detectors allows a researcher to quickly conduct millions of chemical, genetic or pharmacological tests
High throughput screening (HTS) at iNovaciaiNovacia AB
iNovacia offers high quality high-throughput screening services supported by a compound collection and screening libraries of highest international standards. iNovacia has a broad experience with all major target families and assay types.
Although commonly used in other settings, defining animal welfare as part of a corporate CSR setting is not new.
There are many ways to define CSR. What they have in common is that CSR describes how companies manage their business processes to produce an overall positive impact on society. The phenomenon CSR is a value concept that is susceptible to particular ideological and emotional interpretations. Different organizations have framed different definitions - although there is considerable common ground between them.
Some important national players of the food chain at different steps (mainly food retailers and food services) have included animal welfare in their CSR.
A brief presentation on cell counting and cell viability assays. For cell cytotoxicity assays, you can check my profile where I have uploaded a separate file.
Prepared in July 2015
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Basavarajeeyam is an important text for ayurvedic physician belonging to andhra pradehs. It is a popular compendium in various parts of our country as well as in andhra pradesh. The content of the text was presented in sanskrit and telugu language (Bilingual). One of the most famous book in ayurvedic pharmaceutics and therapeutics. This book contains 25 chapters called as prakaranas. Many rasaoushadis were explained, pioneer of dhatu druti, nadi pareeksha, mutra pareeksha etc. Belongs to the period of 15-16 century. New diseases like upadamsha, phiranga rogas are explained.
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
MANAGEMENT OF ATRIOVENTRICULAR CONDUCTION BLOCK.pdfJim Jacob Roy
Cardiac conduction defects can occur due to various causes.
Atrioventricular conduction blocks ( AV blocks ) are classified into 3 types.
This document describes the acute management of AV block.
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
Phone Us ❤85270-49040❤ #ℂall #gIRLS In Surat By Surat @ℂall @Girls Hotel With...
Cell lines Basics
1. Basics of Cell Culture
K. Manohar Babu
Research Scholar
Under Guidance of
Dr. M. Hema Prasad
Dept. Of Toxicology
Institute Of Genetics and Hospital for Genetic Diseases
Work is carried in IIT-M
As a part of Summer Research Program
By - Indian Academy of Sciences
During ---Aug to Oct -2011
2. Introduction
• Cell culture is the process by which animal cells
or plant cells are grown under controlled
conditions.
• Cell culture was first successfully undertaken by
Ross Harrison in 1907
• Roux in 1885 for the first time maintained
embryonic chick cells in a cell culture
3. Types of celllines
• On the basis of morphology or on their functional characteristics. They
are divided into three.
• Epithelial like-attached to a substrate and appears flattened and
polygonal in shape Ex: Adherent cell lines
• Cervical cancer celllines: HeLa
• Breast cancer celllines: MCF-7
• Lymphoblast like- cells do not attach remain in suspension with a
spherical shape Ex: Suspension cell lines
• Leukemia celllines: K562
• Fibroblast like- cells attached to an substrate appears elongated
and bipolar
• Carotid celllines: HacCat
5. Topics to be covered………
• General maintenance of cell lines
• Media preparation
• Cell count and seeding
• Trypsinization of cell lines
• Cryopreservation
• Drug sensitivity assay
• Drug calculation
• MTT assay/Alamar blue assay
• Cell cycle analysis by flow cytometry
• Soft Ager assay
• Wound healing assay
• DNA damage by Hoechst nuclear staining
6. Why is cell culture used for?
Areas where cell culture technology is currently playing a major role.
• Model systems for
Studying basic cell biology, interactions between disease
causing agents and cells, effects of drugs on cells, process and
triggering of aging
• Toxicity testing
Study the effects of new drugs
• Cancer research
Study the function of various chemicals, virus & radiation to
convert normal cultured cells to cancerous cells
• Virology : Cultivation of virus for vaccine production.
• Genetic Engineering : Production of commercial proteins e.g. polio,
rabies, hepatitis B & measles
• Gene therapy
7. Primary culture
• Cells when surgically or enzymatically removed from an
organism and placed in suitable culture environment will
attach and grow are called as primary culture
• Primary cells have limited life span
• Cells such as macrophages and neurons do not divide in
vitro so can be used as primary cultures
Continous celllines
Cell lines which either occur spontaneously or induced virally
or chemically transformed into Continous cell lines
-Fast growth and have aneuploid chromosome number
-ability to grow upto higher cell density
-stop expressing tissue specific genes
8. Culture media
• Choice of media depends on the type of cell being cultured
• Commonly used Medium are EMEM,DMEM etc.
• Media is supplemented with antibiotics viz. penicillin,
streptomycin etc.
• Prepared media is filtered and incubated at 4 C
9. Trypsinization of cell lines/ Passazing:
• Culture flasks were observed under 10X microscope, if cell lines are
confluent proceed for trypsinization.
• Nutrient media (DMEM) is removed and washed with 1 ml of PBS
buffer discard the buffer.
• 500 ul of tripsin is added to the culture flask and incubate at 37oC for
5 min in CO2 incubator.
• Observe the cell under the microscope. Cells will be round and
detaching from the surface. Mix well by using pipet.
• Take the detached cells by pipette to 1 ml ependroff and centrifuge
at1500 RMP for 4 min.
• Add fresh nutrient medium and resuspend
10. Cell count and seeding
• Celllines after confluent, trypsinized and collected in 1 ml eppendroff.
• Cells were centrifuged, decanted the supernent and resuspended with 1 ml
fresh medium
• 10 ul of Suspended culture is diluted with 90ul of fresh medium.
• 10 ul of diluted culture is loaded in hemocytometer.
• Count the number of cells in four different chambers
12. Cell viability
• Cell viability is determined by staining the cells
with trypan blue
• As trypan blue dye is permeable to non-viable cells
or death cells whereas it is impermeable to this dye
• Stain the cells with trypan dye and load to
haemocytometer and calculate % of viable cells
- % of viable cells= Nu. of unstained cells x 100
total nu. of cells
13. Cryopreservation
• After trypsinization some cells are stored at low temperature i.e Liquid
nitrogen
• Cells were washed with PBS
• In a two ml eppendroff, 10% DMSO is taken and 90% of FBS. To the
mixture of solution pellet is added and kept at -80 oC and then liquid
nitrogen.
• 4. The cell stored at -80 oC is viable up to 6 months
• Cell stored at -160 oC (i.e liquid nitrogen) viable for 2 years
14. Detection of contaminants
• In general indicators of contamination are turbid culture
media, change in growth rates, abnormally high pH, poor
attachment, multi-nucleated cells, inclusion bodies and
cell lysis
• Yeast, bacteria & fungi usually shows visible effect on the
culture
• Mycoplasma detected by direct DNA staining with
intercalating fluorescent substances e.g. Hoechst 33258
• The best and the oldest way to eliminate contamination is
to discard the infected cell lines directly
15. Basic equipments used in cell culture
• Laminar cabinet-Vertical are preferable
• Incubation facilities- Temperature of 25-30 C for insect &
37 C for mammalian cells, co2 2-5% & 95% air at 99%
relative humidity. To prevent cell death incubators set to
cut out at approx. 38.5 C
• Refrigerators- Liquid media kept at 4 C, enzymes (e.g.
trypsin) & media components (e.g. glutamine & serum) at
-20 C
• Microscope- An inverted microscope with 10x to 100x
magnification
• Tissue culture ware- Culture plastic ware treated by
polystyrene
16. Topics to be covered………
• General maintenance of cell lines
• Media preparation
• Cell count and seeding
• Trypsinization of cell lines
• Cryopreservation
• Drug sensitivity assay
• Drug calculation
• MTT assay/Alamar blue assay
• Cell cycle analysis by flow cytometry
• Soft Ager assay
• Wound healing assay
• DNA damage by Hoechst nuclear staining
17. Drug calculations
• Find out the solubility of given extract/ product in water,
DMSO or alcohol.
• If the extract is crude (mixture of components or plant
derived substance) prepare 1 mg/ml solution.
• If it is known compound take directly molar
concentrations i.e 10 nm, 100 nm, 1000 nm, 10 um, 50 um
etc.
• Day 1: Seed 5000 cells/well in 96 well plate, let the cells
grow for 24 hours at 370C in CO2 incubator.
• Day 2: Change the media aseptically to all wells. One row
untreated, one row vehicle control or solvent treated and
rest of the wells are treated with increasing concentrations
in triplicate.
• Day3: Let the exposure of drug and cell lines for 24 hours.
After exposure time proceed for MTT or Alamar blue
assay.
18. S.No Size Seeding density Cells at Trypsin-0.05% Growth Media
confluence EDTA –0.53 mM
Culture Dishes
1 35 mm 0.3 X 106 1.2 X 106 1 ml 2 ml
2 60 mm 0.8 X 106 3.2 X 106 2 ml 3 ml
3 100 mm 2.2 X 106 8.8 X 106 3 ml 10 ml
4 150 mm 5.0 X 106 20 X 106 8 ml 20 ml
Culture plates
1 6 well 0.3 X 106 1.2 X 106 2 ml 3-5 ml
2 12 well 0.1 X 106 0.4 X 106 1 ml 1-2 ml
3 24 well 0.05 X 106 0.2 X 106 0.5 ml 0.5-1 ml
Culture Flasks
1 T-25 0.7 X 106 2.8 X 106 3 ml 3-5 ml
2 T-75 2.1 X 106 8.4 X 106 5 ml 8-10 ml
3 T-160 4.6 X 106 18.4 X 106 10 ml 30. l
19. Alamar blue assay
• Alamar Blue works as a cell viability and proliferation indicator
through the conversion of resazurin to resorufin. Resazurin, a non-
fluorescent indicator dye, is converted to highly red fluorescent
resorufin via reduction reactions of metabolically active cells. The
amount of fluorescence produced is proportional to the number of
living cells.
Resazurin (Purple) Resorufin (Red)
20. • Principle of Flowcytometry:
• A beam of laser light of a single wavelength is directed onto
a hydrodynamically-focused stream of liquid.
• A number of detectors are aimed at the point where the stream passes
through the light beam: one in line with the light beam (Forward
Scatter or FSC) and several perpendicular to it (Side Scatter or SSC)
and one or more fluorescencedetectors..
• Each suspended particle from 0.2 to 150 micrometers passing through
the beam scatters the ray, and fluorescent chemicals excited into
emitting light at a longer wavelength than the light source. This
combination of scattered and fluorescent light is picked up by the
detectors, and, by analysing fluctuations in brightness at each
detector .
• FSC correlates with the cell volume and SSC depends on the inner
complexity of the particle (i.e., shape of the nucleus, the amount and
type of cytoplasmic granules or the membrane roughness).
21. Cell cycle analysis by flow cytometry
• Seed cells in a 12 well plate with 4X105 cells/well cell densities.
Label the wells accordingly the treatment.
• Incubate for 24 hours at 37oC in 5% CO2 incubator. Remove the spent
medium and add 500-750 ul of medium containing the drug at
required concentration.
• Allow the drug, medium to stand for required exposure time.
• Harvest the cells, i.e collect the cells in spent medium, The cells in the
wells are washed with PBS-EDTA and remove by tripsinization,
which is then collected in the same tube used for cells collected in
spent , Add 300 ul of PBS-EDTA, resuspend cells by tapping
• Count the cells using tryptophan blue inclusion assay. Count all cells
(live + dead), estimate the cell density.
• Add 700 ul of 70% ethanol (ice cold) to the suspended cell solution
with mild vertexing during drop wise addition of 70% ethanol.
• Keep these fixed cells in 4oC until analysis in flow cytometery
22. • Centrifuge cells at 3000 rpm for 5 min., Decant supernent.
• Wash with ice cold PBS containing 1%FBS and re-centrifuge.
• Decant supernent and resuspend cell pellet in 300 ul PBS-EDTA
• Add 5 ul of 10 mg/ml RNase and incubate for 1 hour at 37 oC
• 1mg/ml propidium Iodide is added to final concentration of10 ug/ml
(3ul).
• Keep in dark at 4oC (If stored)
• Analyze in flow cytometer at 488nm
23. Soft Ager assay
• Melt 1% Agar (DNA grade) in microwave, cool to 40°C in a
waterbath. Warm 2X RPMI + 20% FCS to 40°C in waterbath.
Allow at least 30 minutes for temperature to equilibrate.
• Mix equal volumes of the two solutions to give 0.5% Agar + 1X
RPMI + 10% FCS.
• Add 1.5mL/ 35 mm dish (2.5mL), allow to set. The plates can be
stored at 4°C for up to 1 week.
• Top Agar
• Melt 0.7% Agar (DNA grade agarose) in microwave, cool to 40°C
in a waterbath. Also warm 2X RPMI + 20% FCS to the same
temperature.
• Require 5,000 cells/35mm plate. Add 0.1ml of cell suspension to
centrifuge tubes.
• For plating add 3mL (5mL) 2X RPMI + 10% or 20% FCS and
3mL (5mL) 0.7% Agar to tube with cells,
• Incubate assay at 37°C in humidified incubator for 10 - 14 days.
• Stain plates with 0.5mL of 0.005% Crystal Violet for >1 hour,
count colonies using a dissecting microscope.
24. Wound healing assay
• The assay is a “wound gap” in a cell monolayer is
created by scratch, followed by monitoring the
“healing” of this gap by cell migrating and growth
towards the center of the gap, hereby filling up the
“gap”. Factors that alter the motility and growth of
the cell can lead to increased or decreased rate of
“healing” of the gap.
25. • Cells were grown in DMEM supplemented with 10% FBS.
• Cells were seeded into 24-well tissue culture plate, they
should reach ~70-80% confluence as a monolayer.
• Gently scratch the monolayer with a new 1 ml pipette tip
across the center of the well. Scratch a straight line in one
direction.
• After scratching, gently wash the well twice with medium
to remove the detached cells. Replenish the well with fresh
medium.
• Grow cells for additional 48 hours (or the time required).
• Wash the cells twice with 1x PBS then fix the cells with
3.7% paraformaldehye for 30 minutes.
• Fixed cells are stained with 1% Crystal Violet in 2%
ethanol for 30 minutes.
26. DNA damage by Hoechst nuclear staining
• Count cells.
• To confluent cell lines, aspirate the media and replace with
fresh media
• Mix gently. Add 5 μl of Hoechst 33342 stock solution and
mix again. Incubate at 37oC for 45 min.
• Preparation of Hoechst 33342 stock solution:
• Dissolve 1 mg of Hoechst 33342 powder in 1 ml of
distilled water. Store at 2-8oC protected from light for up
to 1 month.
27. Effect of IL-18 cytokine on different
Cancer cell lines and combinational
effect with Curcumin
Under supervision of
Dr. Karunagaran Devarajan
Dept. of Biotechnology, IIT-M
28. IL-18 is also called as Interferon inducing factor-g
IL-18 is a pro inflammatory cytokine with anti
cancer activity
Schismatic representation of IL-18 gene and promoter polymorphism
29. S. Polym Res Type of Patient Associated/N Cancer out Author & year
N orphi ults Cancer s Vs come
o sm Control
-607
C/A
IL-18
polycystic ovary 118 Vs 79
1 C Not Associated Protective role Yang et al., 2010
syndrome Chinese
73 Vs 97 Farjadfar
2 A IL-18 lung cancer Associated cancer risk
Iranian Et al., 2009
232 Vs
3 A IL-18 GI cancers 312 Associated Protective role Haghshenas et al., 2009
Iranian
Nasopharyngeal 250 Vs 270
4 A IL-18 Associated cancer risk Nong et al., 2009
carcinoma Chinese
85 Vs 158
5 A IL-18 ovarian cancer No t Associated No role Samsami et al., 2009
Iranian
6 A IL-18 breast cancer 250 Vs 206 Associated Protective role Khalili et al., 2009
head and neck
7 A IL-18 squamous cell 111 Vs 212 Not Associated No role Asefi et al., 2009
carcinoma
Indian Increased Cancer
8 C IL-18 Cervical cancer Associated Sobti et al., 2008
opulation risk
nasopharyngeal 163 Vs 164 Increased cancer
9 A IL-18 Not Associated Farhat et al., 2008
carcinoma Tunisian risk
hepatocellular Increased risk of
10 C IL-18 Associated Bouzgarrou et al., 2008
carcinoma Cancer
11 A IL-18 oral cancer 149 Vs 89 Not associated No role Vairaktaris et al., 2007
Esophageal
235 Vs 250
12 C IL-18 squamous cell Associate Increased risk Wei et al., 2007
Chinese
carcinoma
265 Vs 280
13 A IL-18 prostate cancer Associate Increased risk Liu et al., 2007
Chinese
30. Hypothesis: IL-18 cytokine therapeutical
response depends on type of cancer.
• Some cancers are very sensitive and give good response to
IL-18 and inhibit tumor development and some types may
resistant and not influenced by IL-18.
• Aim: To evaluate effect of IL-18 in different cell lines
and to find out IC 50 value of IL-18 and Curcumin on
different cell lines.
• Methodology: Different cell lines are tested against IL-18
and finding sensitivity of IL-18 in different cell lines. Cell
cycle analyses, MTT assay, RT-PCR are performed to see
the sensitivity.
• Possible outcome: Different cell line might have different
IC50 values; this data may be useful for those conducting
clinical studies with recombinant IL-18 therapy.
31. • Curcumin is a anti inflammatory agent and
IL-18 is pro inflammatory cytokine.
• Combination of these two agents might
effective in anti cancer therapy.
Treatment with IL-18 alone
Treatment with Curcumin alone
Treatment with IL-18 along with IC50
value of curcumin
Treatment with Curcumin along with
standard value of IL-18
56. Conclusion
IL-18 enhances cell proliferation in HeLa, K-562
and HacCat cell lines but not in MCF-7
IL-18 increase IC50 value of curcumin in K562
cell lines and HeLa cell lines, infers may provide
drug resentence.
Recombinant IL-18 may not best choice of drug
for Breast cancers