Thursday, February 18, 2016

Florida Project: Stem Cell Provides Cure for Type 1 Diabetes

What is Type One Diabetes/ Juvenile Diabetes? : 
It is usually diagnosed in children and young adults. Only 5% of people with diabetes has this form. In Type One diabetes, the body does not produce insulin. The body breaks down the sugars and starches eaten into a simple sugar called glucose which is used for energy. Insulin is the hormone that the body needs to get glucose from the bloodstream to the cells of the body. Insulin treatment and other treatments are used to live long and healthy lives. (B) Living with T1D is a constant balancing act. People with T1D must regularly monitor their blood-sugar level, inject or continually infuse insulin through a pump, and carefully balance their insulin doses with eating and daily activities throughout the day and night.(C)

Type 1 diabetes (T1D) is an autoimmune disease in which a person’s pancreas stops producing insulin, a hormone people need to get energy from food. T1D strikes both children and adults at any age and suddenly. Its onset has nothing to do with diet or lifestyle. Though T1D’s causes are not yet entirely understood, scientists believe that both genetic factors and environmental triggers play a role. There is currently nothing you can do to prevent it, and there is no cure.(C) Scientists believe they may have moved a step closer to a cure for the type of diabetes that develops in childhood and usually leads to a lifetime of insulin injections.(A)
2016: The Possible Cure?:
Type 1 diabetes is usually diagnosed in children and young adults, and was previously known as juvenile diabetes. Only 5% of people with diabetes have this form of the disease.
In type 1 diabetes, the body does not produce insulin. The body breaks down the sugars and starches you eat into a simple sugar called glucose, which it uses for energy. Insulin is a hormone that the body needs to get glucose from the bloodstream into the cells of the body. With the help of insulin therapy and other treatments, even young children can learn to manage their condition and live long, healthy lives.
- See more at: http://www.diabetes.org/diabetes-basics/type-1/#sthash.DWtANr2q.dpuf
Type 1 diabetes is usually diagnosed in children and young adults, and was previously known as juvenile diabetes. Only 5% of people with diabetes have this form of the disease.
In type 1 diabetes, the body does not produce insulin. The body breaks down the sugars and starches you eat into a simple sugar called glucose, which it uses for energy. Insulin is a hormone that the body needs to get glucose from the bloodstream into the cells of the body. With the help of insulin therapy and other treatments, even young children can learn to manage their condition and live long, healthy lives.
- See more at: http://www.diabetes.org/diabetes-basics/type-1/#sthash.DWtANr2q.dpuf
By transplanting stem cells in mice with a 'reverse of the equivalent type 1 diabetes' allows for the replacement of cells in the pancreas which are damaged and therefore unable to produce insulin due to T1D. Without insulin, the body has difficulty absorbing sugars such as glucose from the blood. The disease usually first shows in childhood or early adulthood and used to be a killer, but glucose levels can now be monitored and regulated with insulin injections. These damaged B-cells (cells that normally produce insulin) are the prime targets of stem cell experiments. This is much more difficult than it sounds because Beta Cells/B-cells do not readily regenerate. (A)

Researchers in California reportin the 'Writing in the Journal Cell Stem Cell', Gladstone Institutes in San. Fran described how they collected skin cells known as fibroblasts from lab mice. They then treated the fibroblasts with unique cocktail of molecules and reprogramming factors. The cells were transformed into endoderm-like cells. These endoderm cells are found in the early stages of an embryo that eventually mature into the body's major organs (including the pancreas). (A) Another chemical cocktail was also used to transform the endoderm-like cells  into early pancreatic cells (aka: PPLCs). The initial goal was to coax PPLCs to mature into cells similar to B-cells to respond to the correct chemical signals and secrete insulin. Results of initial experiments which were performed on petri-dishes showed that they did do just that. (A)
The team then injected these cells into mice that had been genetically modified to have high glucose levels, mimicking the type 1 diabetes condition in humans. In just one week post-transplant the animals' glucose levels began to decrease approaching normal levels. Once the transplanted cells were removed there was an immediate spike in glucose levels. This showed the direct link between transplantation of PPLCs and reduced hyperglycemia (aka: high glucose levels). Two months post- transplant, the California researchers found that the pancreas like cells had turned into REAL fully functioning insulin secreting Beta cells had developed in the mice. These results show and prove that one day there might be a cure for type 1 diabetes in humans. (A)

Links:
(A)http://www.theguardian.com/society/2014/feb/06/scientists-closer-stem-cell-cure-type-1-diabetes
(C) http://jdrf.org/about/about-type-1-diabetes-t1d/

Frida Kahlo: Brain Surgery



INTRODUCTION:
Thanks to Karl Ove Knausgaard who, was inspired by the book 'Do No Harm' by British Neurosurgeon Henry Marsh, beautifully wrote an article for the New York Times called, "The Terrible Beauty of Brain Surgery" We now know of a new and rare form of brain cancer and the radical surgery to prolong patients’ lifespans. Located in Tirana, the capital city of Albania, 'Spitali Nene Teresa' is the hospital in which the operations are taking place.


Marsh studied philosophy, politics, and economics at Oxford University which gave him a keen interest in the Soviet Union. After the Cold War Ended, he began working pro bono at a neurosurgical ward in Kiev where conditions were primitive and appalling. The 2007 documentary, "the English Surgeon" showed some brutal operations where he worked. One operation where they used a Bosch drill (the kind you would buy at a hardware store) to open the skull. In another operation they used a wire saw that sent blood and dust flying. Marsh would send the surgeons medical equipment using his own car to load with instruments.(A)

Marsh went to Tirana to demonstrate a surgical procedure in which he helped pioneer. It was called, 'Awake Craniotomy'. This surgical technique is performed in patients with brain tumors in/near critical brain areas (i.e. motor or speech cortex also known as 'eloquent cortex') This procedure involves the removal of brain tumors such as gliomas and metastatic brain tumors. The patients are given 'asleep-awake-asleep' anesthesia. This means that the patient is sedated for the first part of the procedure when the neurosurgeon makes a small aperture in the patient's skull. At the critical phase during the tumor removal the patient is gently awakened. The brain areas around the tumor are then electrically stimulated.(C)
The patient is kept engaged by doctors asking him or her to read or answer simple questions while probing the exposed brain tissue with a mild current. If the stimulation inhibits or causes any form of hesitation in the patient’s performance that area is left alone. If the patient experiences confusion also indicates to the neurosurgeon to leave that specific area alone. The patients reactions are key to this operation as they assess as a neuro-monitoring technique or in other words a functional MRI (fMRI) to determine how much of the tumor can be removed. The patient goes back under sedation and the surgery is completed.(C) 

This procedure removes a kind of brain tumor that looks like the brain itself. These rare tumors are most common with younger patients of which there is no cure for. However, without 'Awake Craniotomy',  50% of the patients die within 5 years, and 80% within 10 years. The operation prolongs their lives by 10 to 20 or even sometimes more years.(A)
This type of surgery is used for a wide range of neurological problems such as epilepsy to an injury or an infection that lies within the brain. A craniotomy is usually preceded by an MRI scan. The surgeon can then use the resulting image to determine the best position and how much bone is needed to access the area of the brain with the specific problem. Although  functional MRI (fMRI) can show areas of the brain that are activated during speech and motion. There is a more accurate way in which results can be achieved which is through the mapping of these critical areas of the brain during brain surgery as the patient is awake. (B)
To distinguish between the tumor and healthy brain tissue, the patient is kept awake throughout the operation. During the procedure, the brain is stimulated with an electric probe so that the surgeon can see if and how the patient reacts. The team in Albania had been preparing for 6 months in which 2 cases were selected that were well suited to demonstrate the method.(A)

The procedure goes as follows; patient is put under anesthesia, his or her skull is then opened, skin and bone are moved aside to get access to the brain, then the patient is woken up carefully/gently, next a neuropsychologist engages the patient in conversation as a probe with mild electrical current is applied to the surface of the exposed brain. There is no pain for the patient because the brain has no pain receptors. If the patient's performance is hindered due to the probe stimulation the area stimulated is preserved.(B)
Marsh explained that as a neurosurgeon you are constantly tempted to remove the entire tumor, but if you go too far you remove too much and the consequences can be severe. These consequences may lead to full or partial paralysis of one side of the body or other functional impairments or personality changes. When the patient is awake, it allows for the surgeon to determine where the dividing line lies and to observe the consequences of the procedure directly and immediately and stop before any serious damage is done.(A)

In the Operating Room the patient's head is clamped down so no movement occurs when the operation is taking place. The upper part of the skull is removed. Inside, the pulsating brain can be seen. Monitors of the operating room show an enlarged image of the brain. In the middle, a pit had been scooped out. In the center of the pit was a white substance, shaped like a cube. The white cube, which appeared to be made of firmer stuff, was rubbery and looked like octopus flesh. It must be the tumor. When a patient has a tumor that is located near the region of the brain that controls motor and speech, a neurosurgeon may choose to perform the procedure while the patient is alert. (A)

If, when we are removing the tumor, you start to feel a little weak, then we’ll know that it’s time to stop. It is quite possible that after the operation there will be some weakness on your left side, but you almost certainly will get better. The risk of leaving you permanently paralyzed is not zero, but it is very small, less than 1 percent. I hope we can remove all of the tumor, but we might not, and you will need brain scans in the years to come. If there is no weakness after the operation, I hope you will be back to bricklaying in five or six weeks.(A)

The skull, now bare,  was then drilled making 3 holes. Next step was to cut from the first hole to the second then lastly to the third while blood and bone dust were being sucked away coming full circle. Then, the top of the skull which was cut in shape of a circle was taken out. Gently pulling the next flap like layer of the skull back, the brain is then exposed. The brain pulsated slowly. Then they would sew up the meninges back down.(A)

The operating team then has a limited amount of time, usually no more than two hours from the moment the skull is opened, during which to remove as much of the tumor as possible. The patient continues to talk and engage with doctors as the operation is performed. This process lessens the risk of cutting into the fibers that connect speech areas. When as much of the tumor as possible has been taken out, the patient is put back to sleep. The skull is then closed and the procedure completed.(B)

The sections of the skull that are removed vary in size, ranging from very small dime-sized pieces that are taken out in order to remove small tumors or drain blood clots to larger sections, called bone flaps, that are taken out to allow doctors to access the brain itself.(B) This step was to set the proper conditions for the second part of the operation for the next day. The whole process was reversed. They stitched the scalp back together. Since Albania is still a developing country with very poor and lack of resources, Marsh considered performing such an operation at such a high level to be a 'state of art'.(A)

The patient would be under general anesthesia, lying underneath blue surgical sheet with only the skull visible. Actual removal of the tumor would take place on the next day.  Under normal circumstances, Marsh would most often perform both steps in a single day however since this is a very new procedure within the Tirana Hospital, he would have to wait to finish til the second day. Operating Room the patient's head was clamped down but this time he was wide awake.  A small mapping device transmitted images of the brain upon the screen in which the image on the monitor would change as the position of the device changed. Before he began the operation, Marsh studied the monitor where the last brain scan was displayed.(A)
The stitches were removed. The scalp was then folded back showing a bare skull the lid was then removed and placed in a dish. Stitches in the meninges were then removed and the brain was once more exposed. The slightly pinker area of the exposed brain was the patient's tumor. Marsh explained that this specific area of the brain should be the sensory cortex. If he was wrong there will be movement.“In England, everyone would be lively and chatting away by now. Distraction is a good painkiller.” “Here the culture is different. It’s more vertical. In London, it’s horizontal. Ah, this churchlike silence!”(A)
At a strength of level 3 electricity was placed on the brain with a fork in which the patient felt a sensation in his face. When turning it up to level 5, the patient felt a sensation in the Left arm, face, and tongue. Marsh touched the brain again. However, this time the patient lifted his arm immediately into the air, it shook for a few seconds then laid back down. While they wheeled over the microscope, which was fastened by a mobile crane to a large machine, to which a monitor was also connected. Marsh bent over the microscope and began to operate.(A)

On a monitor, Marsh, could be seen digging a small hole within the tumor which looked identical to the surrounding brain tissue. With his left hand he made the blood congeal and with his right he used his suctioning device. He pulverized and remove tiny pieces of tissue, shred after shred. As the hole of the tumor grew, the stimulator was used once more but this time at level 8 until there was a reaction. The face, this time had a reaction. The center for facial movement, has to be left in peace insisted Marsh. Behind the innermost wall, seeming to swell out slightly, like a balloon about to burst was something purple. This walnutlike lump, composed of 100 billion brain cells so tiny and formed of human flesh.(A)

Marsh explained how they reached tumors that were lodged deep in the brain, which is, very loosely speaking, crumpled up like a sheet of paper, and therefore full of folds and ravines that you can push aside and move through. There are also so-called silent areas, which could be cut without damaging any of the brain’s functions. He told me about times when things had gone wrong, and the patient had died on the operating table in front of him. “I have killed people,” he said(A).

He 50 percent of surgery was visual, what you saw, and 50 percent was tactile, what you could touch. Brain surgery was a craft. To become good at it, you had to practice and sometimes make mistakes, in a profession where mistakes were fatal and impermissible. If your child has a brain tumor, you want the best surgeon. But to become the best, which is merely a question of gaining experience, you must first have operated on children without having experience. The particularities of operating on children is that their tissues are soft and very different from those of older people. A child is as fresh and clean on the inside as on the outside. However, the risks with children are greater because blood loss is very great with them.  The surgery is easy on the children because if they’re not in pain, they’re happy. (A)

CONCLUSION:
Tumors grew randomly, people died randomly, every day, everywhere. You could choose to keep this from sight behind numbers, behind statistics, behind the plastic drapes that made the patients faceless. His greatness was that he didn’t hide the smallness but instead used his insight into it to fight against everything that concealed it, the institutionalization of hospitals, the dehumanization of patients, all the rituals established by the medical profession to create distance and to turn the body into something abstract, general, a part of a system. Marsh had operated on an infant, only a few months old, and the operation went badly; the child died on the operating table. Marsh went in to see the parents in person. He told them that he had made a mistake, and that their child had died. He cried with them. “No doctor does that,” Fejzo had said. “No one.” (A)
LINKS:
(A) http://www.nytimes.com/2016/01/03/magazine/karl-ove-knausgaard-on-the-terrible-beauty-of-brain-surgery.html?_r=0
(B)http://www.pbs.org/pov/englishsurgeon/awake-brain-surgery/
(C) http://www.pacificneuroscienceinstitute.org/blog/brain-skull-base-tumors/the-evolution-of-awake-brain-surgery/
(D)http://movies.homeofthenutty.com/thumbnails.php?album=349

*These images are not mine! They were found on various tumblr sites- if any are yours please let me know so that I can give you credit! Thanks so much ~

Thursday, December 17, 2015

Alzheimers' Mice Cognitive Function Restored

INTRODUCTION:
Are you an athlete? Have you ever been on a sports team in High School or College? Do you exercise? Almost everyone will say yes to any of these questions and if so many of us have at some time or another drank an energy drink to give us a boost. Recent research in mice have shown that these very energy drinks contain in them a compound that clears Beta Amyloid Plaques of early stages of Alzheimer's in the brain of mice that contain a build up of plaque.

The results of the preliminary tests show that when this compound was added to their drinking water, it cleared the amyloid beta plaques from the mice that were suffering with Alzheimer like symptoms subsequently restoring their cognitive function to normal. Although it is still very early in research, these results give hope in potentially stopping the progression of the disease and in the prevention of amyloid plaques accumulating in the brain which kill off brain cells (a process known as neuro-degeneration).
BACKGROUND INFORMATION:
The definition of Alzheimer's Disease, (Thanks to Google Search Engine) is a progressive mental deterioration that can occur in middle or old age, due to generalized degeneration of the brain. It is the most common cause of premature senility. It is a disease that destroys memory and other mental functions. This is the most common form of dementia in which symptoms develop at a very steady state,  becoming increasingly worse as time progresses, becoming so severe as to interfere with a suffers' daily tasks.
RESEARCH: 
EPPS, the chemical in energy drinks, was discovered by researchers in Korea. Their most recent study included adding EPPS to the water mice were drinking from and found that the mice improved in maze tests and the extinction of plaques in their brains. Much more research is needed to see if the compound (similar to taurine- an Amino Acid found in Red Bull and other energy drinks) is effective for humans not just mice. There also needs more work to be done so that there are more chemicals discovered which are similar to EPPS that have the potential of improving dementia in humans. The side effects this compound has on humans is also unknown although none of the mice experienced any bad side effects.
CONCLUSION:
Patients who suffer from Alzheimer's have plaques that have built up over a decade or more causing serious damage and other mental impairments. Teams of researchers everywhere have tried to discover drugs that remove the amyloid plaques. One recent approach has been to design antibodies that bind to these plaques which then break them down.
 
This study has found a new chemical that could help to clear some forms of amyloid, the toxic protein that is a hallmark of Alzheimer’s disease. However, so far this has only been shown in mice, which do not fully replicate several of the important changes that we see in the brains and behaviors of people with dementia. Further expanding our understanding of Alzheimer’s disease all the time, and there are already a number of drugs in clinical testing that are targeted against amyloid. We hope that new findings will one day translate into real treatments for people living with dementia.
 
LINKS:
(A)http://www.theguardian.com/science/2015/dec/08/taurine-like-chemical-restores-cognitive-function-in-mice-with-alzheimers
(B)https://www.google.com/search?site=&source=hp&q=what+is+alzheimer%27s+disease&oq=what+is+alzheimer%27s+disease&gs_l=hp.3..0l10.578.9404.0.9489.28.21.0.0.0.0.758.4062.2-3j4j1j1j1.10.0....0...1.1.64.hp..18.10.4058.0.-K_nF7itJaI
(C)http://www.alz.org/alzheimers_disease_what_is_alzheimers.asp
(D)https://animationscreencaps.com/cinderella-2015/

*These are not my images! They were found on various Tumblr sites~if any are yours please let me know so I can give you credit! Thanks so much~Enjoy~

Friday, December 11, 2015

Virus' New Prey, Cancer

INTRODUCTION:
Melanoma, a type of skin cancer, is one of the most common forms of skin cancer related to skin cancer related deaths. Over exposure to UV light is the cause of melanoma.  According to the National Cancer Institute approximately 74,000 Americans will be diagnosed with melanoma and nearly 10,000 will die from the disease in 2015. (B)
 
Cancer hunting virus preys on cancer creates a new era of treatment for patients world wide. This specific new virus could play a key role in patients diagnosed with cancer and having none of the extreme side effects that chemotherapy causes. Treatments for cancer such as chemotherapy are very difficult on the patients physically emotionally and spiritually.
 
Cancer cells are hard to kill off as they spread quickly throughout the body. Patients often lose hair, have internal bleeding due to chronic nausea, and some even death.The first FDA-approved oncolytic virus therapy, for the treatment of melanoma lesions in the skin and lymph nodes. This treatment targets cancer cells and only cancer cells (leaving the healthy cells alone). The treatment then stimulates the immune system to fight the cancer itself in which T-VEC or  talimogene laherparepvec, (under the brand name IMlygic) uses a modified virus to hunt cancer cells. (A)

 TREATMENT:
The treatment consists of a series of injections in the melanoma lesions. A modified form of the herpes virus is what is being injected into each tumor. The genetic code of the virus was taken from a cold sore of a BioVex employee and then modified to kill only cancer cells. There are two modes of action in which this specifically modified virus can perform. It can attack the cancer cells directly or it can trigger the body's immune system to attack rogue cells once the virus is detected. Once the initial injection is performed, the second is given to the patient 3 weeks later, next additional doses are administered every 2 weeks for at least 6 months. This treatment takes place until there are no remaining lesions to treat or unless another treatment is needed to be performed. (A)
RESEARCH:
Study of 436 participants with metastatic melanoma (in which their tumors were not viable for surgical removal) were used to study the safety and efficacy of Imlygic. Lesions in the skin or lymph nodes were treated with Imlygic or a similar therapy treatment for at least 6 months or until no lesions remained. The results concluded that 16.3% of those who recieved Imlygic had decrease in size of their skin and lymph node lesions lasting for a min of 6 months. Whereas, 2.1% of those who recieved comparative therapy. Unfortunately, Imlygic did not show overall survival or have an effect on melanoma which spread to the brain, bone, liver, lungs, or other internal organs. (B) 

Since Imlygic is a modified version of a live oncolytic herpes virus type of therapy, herpes virus infect is possible. Therefore, this form of treatment should not be given to those with suppressed immune systems or those who are pregnant. Side effects of Imlygic treatment include fatigue, chills, fever, nausea, flu-like symptoms, and pain at the injection site. (B)
 
The Mayo Clinical studied mice who developed large tumors and once injected with the virus were completely absent. Viruses can increase a patients lifespan and even cure diseases such as cancer in the future. Dramatic results are needed from such studies so that treatments like chemotherapy and radiotherapy can be replaced with less traumatic therapies such as T-VEC. (A)

 ALTERNATIVES:
Current Oncological treatments (i.e. chemotherapy, radiotherapy) not only kill cancer cells, however damage the rest of the body. Viruses, on the other hand, can be modified to attack only cancer cells so that patients suffer less and have side effects comparable to a flu's symptoms. Cancer-hunting viruses have long been researched, experimented with, and thought of by scientists, researchers, as well as physicians to treat cancer. (A)
 
CONCLUSION:
Imlygic is a significant step in the battle against cancer. Melanoma lesions that cannot be removed completely by surgery are injected with Imlygic, where it replicates inside cancer cells and causes the cells to rupture and die. (B) There is still much progress being made for Imlygic treatment as well as a current number of several similar treatments in their 3rd stage of clinical testing.

LINKS:
(A)http://www.theguardian.com/society/2015/nov/02/fda-approval-imlygic-cancer-hunting-viral-treatment
(B)http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm469571.htm
(C)https://www.cancercommons.org/news/t-vecpembrolizumab-combination-demonstrates-safety-in-melanoma/
(D)https://animationscreencaps.com/brave-2012/

*These images are not mine! They were found on various tumblr sites- if any are yours please let me know so that I can give you credit for them! Thanks so much~

Wednesday, December 2, 2015