This document discusses methods for clinical testing, specifically 3D cell culture and organ-on-chip technologies. It notes that animal testing is time-consuming, costly, and often does not predict human outcomes. Organ-on-chip technologies use microfabrication and microfluidics to create microenvironments that better simulate human physiology and organs. This allows for testing of drugs and toxins using human cells in a way that may replace animal models. Examples discussed include a lung-on-a-chip to study pulmonary edema and a proposed "body on a chip" with 3D printed miniature organs to improve drug development and reduce costs.
An organ-on-a-chip (OOC) is a multi-channel 3-D microfluidic cell culture chip that simulates the activities, mechanics and physiological response of entire organs and organ systems, a type of artificial organ
An organ-on-a-chip (OOC) is a multi-channel 3-D microfluidic cell culture chip that simulates the activities, mechanics and physiological response of entire organs and organ systems, a type of artificial organ. It constitutes the subject matter of significant biomedical engineering research, more precisely in bio-MEMS. The convergence of labs-on-chips (LOCs) and cell biology has permitted the study of human physiology in an organ-specific context, introducing a novel model of in vitro multicellular human organisms. One day, they will perhaps abolish the need for animals in drug development and toxin testing.
Organ-on-a-chip technology provides a novel in vitro platform with a possibility of reproducing physiological functions of in vivo tissue, more accurately than conventional cell-based model systems. Many newly arising diseases result from complex interaction between multiple organs.
What are Organs-on-chips?
The Organs-on-Chips are crystal clear, flexible polymers about the size of a computer memory stick that contain hollow channels fabricated using computer microchip manufacturing techniques.
These channels are lined by living cells and tissues that mimic organ-level physiology.
Microfluidics and organ on a chip technology is an interdisciplinary field of medical and engineering. It will replace the current methods of testing efficacy of drug viz. cells in dishes test and animal testing.
An organ-on-a-chip (OOC) is a multi-channel 3-D microfluidic cell culture chip that simulates the activities, mechanics and physiological response of entire organs and organ systems, a type of artificial organ
An organ-on-a-chip (OOC) is a multi-channel 3-D microfluidic cell culture chip that simulates the activities, mechanics and physiological response of entire organs and organ systems, a type of artificial organ. It constitutes the subject matter of significant biomedical engineering research, more precisely in bio-MEMS. The convergence of labs-on-chips (LOCs) and cell biology has permitted the study of human physiology in an organ-specific context, introducing a novel model of in vitro multicellular human organisms. One day, they will perhaps abolish the need for animals in drug development and toxin testing.
Organ-on-a-chip technology provides a novel in vitro platform with a possibility of reproducing physiological functions of in vivo tissue, more accurately than conventional cell-based model systems. Many newly arising diseases result from complex interaction between multiple organs.
What are Organs-on-chips?
The Organs-on-Chips are crystal clear, flexible polymers about the size of a computer memory stick that contain hollow channels fabricated using computer microchip manufacturing techniques.
These channels are lined by living cells and tissues that mimic organ-level physiology.
Microfluidics and organ on a chip technology is an interdisciplinary field of medical and engineering. It will replace the current methods of testing efficacy of drug viz. cells in dishes test and animal testing.
33D Printing Organ on a Chip, Jan Eite Bullema, TNO Industrial Science
The goal of this so-called deep dive exploration is to identify business potential of biomimetic microfluidic systems (organ-on-a-chip).
One of the most attractive applications of organ-on-a-chip at the moment appears to be mimicking human’s physiological responses for medicine development.
Efficacy of medicine is a big challenge for the pharmaceutical industry. Depending on the illness specific drugs can have an efficacy of less than 30 %.
Drug efficacy is one of the topics addressed by the Netherlands by an "Over de grenzen" KNAW program.
In the presentation I will focus on recent -3D Printing developments- in the field of organ / organ-on-a-chip printing. Just to give an impression of the awesome, fantastic, amazing, wow - no - WOW!!- developments. Since a few years organs are printed in the lab, and I will start with some examples of printed organs bones, kidneys, blood vesels, livers, ears, that can be made at the moment. Then I will dive deeper into organ-on-a-chip, a true micro sysmtems topic - my area of expertise here- , and explain a little on what organs-on-chip are. Subsequent I will go into various technologies for 3D printing of cell and bio materials. And I will finish with some ideas on organ printing that are trully amazing, most impressive are Craig Venter's .
Stem cells and nanotechnology in regenerative medicine and tissue engineeringDr. Sitansu Sekhar Nanda
Alexis Carrel, winner of the Nobel Prize in Physiology or Medicine in 1912 and the father of whole-organ transplant, was the first to develop a successful technique for end to end arteriovenous anastomosis in transplantation.
Multiorgan Microdevices for ADME Evaluatio and Drug Design:-
Multi-organ micro-devices are microfluidic devices that gives the information of human metabolism by connecting the fluidic streams from several on-chip in vitro tissue cultures with each other in a physiologically relevant manner. Multi-organ micro-devices can predict tissue-tissue interactions that occur as a result of metabolite travel from one tissue to other tissues in vitro. These systems are capable of simulating human metabolism, including the conversion of a pro-drug to its effective metabolite as well as its subsequent active metabolite and toxic side effects. Since tissue-tissue interactions in the human body can play a significant role in determining the success of new pharmaceuticals, the development and use of multi-organ micro-devices present an opportunity to improve the drug development process. The devices have the potential to predict potential toxic side effects with higher accuracy before a drug enters the expensive and time consuming phase of clinical trials. Further, when operated with human biopsy samples, the devices could be a way for the development of individualized medicine. Since single organ devices are testing platforms for tissues that can later be combined with other tissues within multi-organ devices, we will also mention single organ devices where appropriate in the discussion those seems large area of interest in current research for individualized medicine and drug resistance study.
A presentation on Tissue Engineering made by Deepak Rajput. It was presented as a seminar requirement at the University of Tennessee Space Institute in Spring 2009.
3D BIO PRINTING USING TISSUE AND ORGANSsathish sak
3D bio printing is the process of creating cell patterns in a confined space using 3D printing technologies.
3D bio printing is the layer by layer method to deposit materials known as bioinks to create tissue like structure.
Currently, bioprinting can be used to print tissues and organs to help research drug and pills.
33D Printing Organ on a Chip, Jan Eite Bullema, TNO Industrial Science
The goal of this so-called deep dive exploration is to identify business potential of biomimetic microfluidic systems (organ-on-a-chip).
One of the most attractive applications of organ-on-a-chip at the moment appears to be mimicking human’s physiological responses for medicine development.
Efficacy of medicine is a big challenge for the pharmaceutical industry. Depending on the illness specific drugs can have an efficacy of less than 30 %.
Drug efficacy is one of the topics addressed by the Netherlands by an "Over de grenzen" KNAW program.
In the presentation I will focus on recent -3D Printing developments- in the field of organ / organ-on-a-chip printing. Just to give an impression of the awesome, fantastic, amazing, wow - no - WOW!!- developments. Since a few years organs are printed in the lab, and I will start with some examples of printed organs bones, kidneys, blood vesels, livers, ears, that can be made at the moment. Then I will dive deeper into organ-on-a-chip, a true micro sysmtems topic - my area of expertise here- , and explain a little on what organs-on-chip are. Subsequent I will go into various technologies for 3D printing of cell and bio materials. And I will finish with some ideas on organ printing that are trully amazing, most impressive are Craig Venter's .
Stem cells and nanotechnology in regenerative medicine and tissue engineeringDr. Sitansu Sekhar Nanda
Alexis Carrel, winner of the Nobel Prize in Physiology or Medicine in 1912 and the father of whole-organ transplant, was the first to develop a successful technique for end to end arteriovenous anastomosis in transplantation.
Multiorgan Microdevices for ADME Evaluatio and Drug Design:-
Multi-organ micro-devices are microfluidic devices that gives the information of human metabolism by connecting the fluidic streams from several on-chip in vitro tissue cultures with each other in a physiologically relevant manner. Multi-organ micro-devices can predict tissue-tissue interactions that occur as a result of metabolite travel from one tissue to other tissues in vitro. These systems are capable of simulating human metabolism, including the conversion of a pro-drug to its effective metabolite as well as its subsequent active metabolite and toxic side effects. Since tissue-tissue interactions in the human body can play a significant role in determining the success of new pharmaceuticals, the development and use of multi-organ micro-devices present an opportunity to improve the drug development process. The devices have the potential to predict potential toxic side effects with higher accuracy before a drug enters the expensive and time consuming phase of clinical trials. Further, when operated with human biopsy samples, the devices could be a way for the development of individualized medicine. Since single organ devices are testing platforms for tissues that can later be combined with other tissues within multi-organ devices, we will also mention single organ devices where appropriate in the discussion those seems large area of interest in current research for individualized medicine and drug resistance study.
A presentation on Tissue Engineering made by Deepak Rajput. It was presented as a seminar requirement at the University of Tennessee Space Institute in Spring 2009.
3D BIO PRINTING USING TISSUE AND ORGANSsathish sak
3D bio printing is the process of creating cell patterns in a confined space using 3D printing technologies.
3D bio printing is the layer by layer method to deposit materials known as bioinks to create tissue like structure.
Currently, bioprinting can be used to print tissues and organs to help research drug and pills.
The void between preclinical testing and clinical trials of drugs reveals a crucial roadblock to efficient drug discovery. This plan defines an apporach to bioengineer structurally representative human tissues in vitro using the power of outstanding international academic collaborations.
collaboration
3D-Bioprinting coming of age-from cells to organsDaniel Thomas
Over the past decade, annual spending on pharmaceutical development to treat many endocrinological systems has increased exponentially.
Currently, preclinical studies to test the safety and efficiency of new drugs, use laboratory animals and traditional 2D cell culture models. Neither of these methods are completely accurate reflections of how a drug will react in a human patient.
A solution has emerged in the form of 3D-Bioprinting technology, developed for the scalable, accurate and repeatable deposition of biologically active materials. With advances in this biomanufacturing technology, durable biological tissues for use in testing new pharmaceutical products are now being harnessed and refined.
A feature run by the monthly magazine for the polo community highlighting the latest in cutting edge regenerative therapy and how it has been translated for equine veterinary use from the human medical world.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
8. Introduction
Drug Testing in animal models is time consuming, costly and often does not predict the adverse effects in
humans and also 60% of animal models are not able to predict the toxicity .(Hamelton et al 2011)
3D Culture models have recently garnered great attention .
They promote levels of cell differentiation not possible in conventional 2D Culture systems.
3D Culture systems is a large microfabrication technologies from the microchip industry and microfluidics.
It approaches to create cell culture microenvironments
This technology supports both tissue differentiation and recapitulate the tissue-tissue
interfaces, spatiotemporal micro gradients and mechanical microenvironments of living organs.
This organs on chips permit the study of human physiology in an organ specific context, enable novel in
vitro disease models, and could potentially serve as replacements of animals used in drug development and
toxin testing
9.
10. Failure to predict human drug
toxicity
50% of Drug Candidates are failed in clinical trails due to the toxicity.
Post marketing with draw or limited use of drugs to adverse drug effects
Drug metabolism as a key determinant of species-species differences in
drug toxicology.
The development of safe and effective drugs is currently hampered by
the poor predictive power of existing preclinical animals that often lead
to failure of drug compounds and late development after they enter in to
the human clinical trials.
Huh et al 2011
11.
12.
13.
14.
Miniature human organs made by 3D printing could create a "body on a chip" that enables better
drug testing. That futuristic idea has become a new bioprinting project.
The 2-inch "body on a chip" would represent a realistic testing ground for understanding how the
human body might react to dangerous diseases, chemical warfare agents and new drugs intended
to defend against biological or chemical attacks.
Such technology could speed up drug development by replacing less-ideal animal testing or the
simpler testing done on human cells in petri dishes — and perhaps save millions or even billions
of dollars from being wasted on dead-end drug candidates that fail in human clinical trials.
Microscale engineering technologies are combined with cultured living human cells to create
microfluidic devices that replicate the physiological and mechanical microenvironment of whole
living organs.
15. 3D Cell Culture
It is defined as the culture of living cells within the microfabricated devices having 3D
structures that mimic tissue and organ specific microarchitechture.
Cell cultures in 3D matrix gels are referred to as 3D ECM gel cultures, 3D gel cultures or
conventional 3D cultures.
Microengineering techniques such as Photolithography, replica modeling and microcontact
printing are well suited to create structures with defined shapes and positions on the
micrometer scale .
That can be used to position cells and tissues control cell shape and function, and create
highly structured 3D culture microenvironments.
16.
17. An Organ-on-a-Chip (OC) is a multi-channel 3-D microfluidic cell culture chip that simulates the
activities, mechanics and physiological response of entire organs and organ systems.
It constitutes the subject matter of significant biomedical engineering research, more precisely in bioMEMS.
The convergence of Lab-on-Chips (LOCs) and cell biology has permitted the study of human physiology in
an organ-specific context, introducing a novel model of in vitro multicellular human organisms.
One day, they will perhaps abolish the need for animals in drug development and toxin testing.
Nevertheless, building valid artificial organs requires not only a precise cellular manipulation, but a detailed
understanding of the human body’s fundamental intricate response to any event.
A common concern with Organs-on-Chips lies in the isolation of organs during testing. “If you don’t use as
close to the total physiological system that you can, you’re likely to run into troubles” says William
Haseltine, founder of Rockville, MD. Microfabrication, microelectronics and microfluidics offer the
prospect of modeling sophisticated in vitro physiological responses under accurately simulated conditions.
18.
19. Microfluidics: The use of microfabrication techniques from the
IC industry to fabricate channels, chambers, reactors, and
active components on the size scale of the width of a human
hair or smaller
Credit: Dr. Karen Cheung, UBC ECE
20.
Sample savings – nL of enzyme, not mL
Faster analyses – can heat, cool small volumes
quickly
Integration – combine lots of steps onto a single
device
Novel physics – diffusion, surface tension, and
surface effects dominate
This can actually lead to faster reactions!
21. • Three PDMS layers are aligned and irreversibly
bonded to form two sets of three parallel
microchannels separated by a 10-mm-thick
PDMS membrane containing an array of
through-holes with an effective diameter of 10
mm. Scale bar, 200 mm.
• After permanent bonding, PDMS etchant is
flowed through the side channels. Selective
etching of the membrane layers in these channels
produces two large side chambers to which
vacuum is applied to cause mechanical
stretching. Scale bar, 200 mm.
• Images of an actual lung- on-a-chip microfluidic
device viewed from above.
PDMS:Poly dimethylsiloxane
ECM : Fibronectin, collagen
22. Cating
PDMS
Membrane
Etching the
membrane
with TBAF
& NMP
Apply
Hydrostatic
Pressure
&Vacume
Bound
irreversibly
with the two
layers
Run the
etchant
solution
Pre
polymered
the layers
Photolithograph
y of
microchannels
Coat with the binding layer
and incubate at 65 c
overnight
Upper chamber
is Alveolar
chamber
Lower chamber
Blood flow
23.
24.
25. Biologically inspired design of a human breathing lung-on-a-chip microdevice.
•
The microfabricated lung mimic device uses
compart- mentalized PDMS microchannels to
form an alveolar-capillary barrier on a
thin, porous, flexible PDMS membrane coated
with ECM.
• The device recreates physiological breathing
movements by applying vacuum to the side
chambers and causing mechanical stretching of
the PDMS membrane forming the alveolarcapillary barrier.
• During inhalation in the living
lung, contraction of the diaphragm causes a
reduction in intrapleural pressure (Pip), leading
to distension of the alveoli and physical
stretching of the alveolar-capillary interface.
26. .
IL-2 therapy is associated with vascular leakage that causes excessive fluid accumulation
(edema) and fibrin deposition in the alveolar air spaces.
27. Endothelial exposure to IL-2 (1000 U/ml) causes liquid in the lower microvascular channel to leak
into the alveolar chamber (days 1 to 3) and eventually fill the entire air space (day 4).
• During IL-2 treatment, prothrombin (100 mg/ml) and fluorescently labeled fibrinogen (2 mg/ml) introduced
into the microvascular channel form fluorescent fibrin clots (white) over the course of 4 days.
• A fluorescence confocal microscopic image
shows that the fibrin deposits (red) in (D) are found on the upper surface of the alveolar epithelium
(green). (F) The clots in (D) and (E) are highly fibrous networks, as visualized at high image.
33. Organ
Rationale
Cell Lines
Characteristics
Liver
Marrow
(Hematopoietic)
p450 activity
sensitive to chemo
dose limiting toxicity
Hep-G2/C3A
MEG-01
Tumor
(Sensitive)
Tumor (MDR)
(Resistant)
initial tumor primary
type
resistant tumors can
MES-SA
hepatoma
megakaryoblast line
attachment/suspension
inducible attachment
uteran sarcoma
sensitive to doxorubicin
variant
selected for resistance
to doxorubicin
MES-SA/DX-5
34. Application to Study Multidrug Resistance Suppressors
Other Tissues/ Debubbler
Device on peristaltic pump
in incubator
Sensitive Tumor
Cells (MES-SA)
Liver Cells (HepG2/C3-A)
Resistant Tumor Cells
(MES-SA/DX-5)
Bone Marrow Blood
Cells (MEG-01)
All cells labeled with cell tracker green before experiment
We need better tools and we need to provide a dynamic environment for our cells
We need to build an engineer and provide a concept mechanisms to the cells and build a engineer a home away from home that is called ….
Here cells feels the dynamic environment and provide the mechanical strains experience how the cells feel in the body and some people try to grow the cells on a dishes and some try to work with small organs in lab and some test on animal testing. But here they are not doing that.
IL-2 Induced pulmonary edema is modeled in a microengineered lung on a chip that reproduces the lung microarchitechture and breathing induced cyclic mechanical distortion of the alveolar capillary interface. The top portion is the air portion is the alveolar space and the bottom portion is the liquid called vascular channel.