Wednesday, March 27, 2019

Blood Vessels Built from a Patient's Cells Could Help People on Dialysis

Sofia Ricciarini
Mr. Ippolito
Current Event 20
March 27, 2019


Temming, Maria. “Blood Vessels Built from a Patient's Cells Could Help People on Dialysis.” Science News, 27 Mar. 2019, www.sciencenews.org/article/bioengineered-blood-vessels-patient-cells-dialysis?tgt=nr.


Scientists have made great progress in the development of bioengineered blood vessels. The new process entails stripping the insides from a deceased donor’s blood cells, multiplying them and eventually implanting them into a patient. The patient’s own cells then gradually migrate into the vessel, allowing them to serve as functional blood cells. This process, designed to be more effective than current options, has been highly successful in trials on patients receiving dialysis. The cells were not rejected by the patient’s immune system and the implanted vessels have since been populated with cells, as was expected.

There is always a high number of people in need of blood vessel implants. According to the article, “Hundreds of thousands of people in the United States alone require blood vessel implants for dialysis” (Temming). This is not including the masses of people who lost blood vessels as a result of injury of tumor removal. If this vessel transfusion eventually becomes a conventional procedure, it will undoubtedly save countless lives.

Overall, the article was very well written. It maintained contained concise detail, summarizing the history and mechanism of the procedure without in a way that was informative yet easily understood. I specifically like the use of a photograph of one such engineered vessel before and after implantation, showing how it would be inhabited by cells. However, I did feel that the article was lacking some information that could have helped deepen a reader’s understanding. For instance, Temming explains the use of authentic vessels is more efficient than using synthetic vessels with similar function. I would have been interested to know more about the alternative procedures currently existing and how they compare to the bioengineered blood vessels at hand.

Tuesday, March 26, 2019

Study Finds Shark Fins & Meat Contain High Levels of Neurotoxins Linked to Alzheimer's Disease

Caitlin Mooney
Mr. Ippolito
Current Event 20
3/26/19

"Study Finds Shark Fins & Meat Contain High Levels of Neurotoxins Linked to Alzheimer's Disease." Study Finds Shark Fins & Meat Contain High Levels of Neurotoxins Linked to Alzheimer's Disease. N.p., n.d. Web. 21 Nov. 2018.

In the article “Study finds shark fins & meat contain high level of neurotoxins linked to Alzheimer's disease”, this article explained how there were high concentrations of toxins in the fins and muscle in 10 different species of sharks. In a new study at the University of Miami, scientists found that those toxins are linked to neurodegenerative diseases including Alzheimers and ALS. This was discovered when fin and muscle tissue samples of the sharks found that there are concentrations of two toxins-mercury and BMAA (β-N-methylamino-L-alanine). These substances pose a threat to human health alone and an even higher risk together. Neil Hammerschlag, a research assistant professor at the UM Rosenstiel school explained, “Since sharks are predators, living higher up on the food web, their tissues tend to accumulate and concentrate toxins, which may not only pose a threat to shark health but also put the human consumers of shark parts at risk.”
About 16 % of the world's shark species are threatened with extinction, but now that we understand how consuming shark parts may be harmful the shark population may be saved. Although consuming sharks could harm people, the outcome is positive because these toxins are saving an overfished species. But many people could see this discovery as negative because it could ruin their favorite food or bring them out of their line of work.

Overall I thought that this article was well written I still think there are some ways the author could have improved his/her writing. The first way that the author could have improved the article was if he/she included his/her name because it is impossible for someone to correctly credit the text. Also, I think the author was a little biased because he/she only talked about the positive effects for sharks after finding the toxins. But besides those issues, I think that this article was easy to follow and I learned a lot about this worldwide problem.

“Sperm with Damaged DNA May Cause Some Repeat Miscarriages.”

Ella Stupart
Mr. Ippolito C Even
March 27, 2019
Current Event #20

Citation:
Cunningham, Aimee. “Sperm with Damaged DNA May Cause Some Repeat Miscarriages.” Science News, 26 Mar. 2019, www.sciencenews.org/article/sperm-damaged-dna-may-cause-some-repeat-miscarriages?tgt=nr.

In the article “Sperm with damaged DNA may cause some repeat miscarriages,”  Aimee Cunningham discusses the possibility of sperm being the cause of repeated miscarriages rather than issues with the female reproductive system. Cunningham introduces a study that was done where 49 men were tested whos partners’ lost their babies before the 20 week mark at least three times in a row. According to the article, the men in the study had double the amount of damaged sperm and four times the amount of harmful molecules than healthy men who were tested for reproductive issues. Endocrinologist, Bradley Anawalt, claims that traditionally doctors have focused on health problems with the women when repeated miscarriages occur. Using this method, 50% of cases of miscarriages were never solved. Issues with the sperm that were never discovered is likely the solution to this medical mystery. Previous methods of counting sperm were not reliable because their methods of determining whether sperm was viable or not was not standard. In this study, they measured the levels of reactive oxygen species in the sperm to determine whether or not sperm was healthy. High levels of these species in sperm can cause damage to the DNA.
This study is extremely important to new discoveries when it comes to miscarriages. Methods of helping couples get pregnant can result from this study and thousands of couples will be able to have children who previously lost hope. Hopefully there will be many babies born that wouldn’t have been if it weren’t for these discoveries. This may also lead to the discovery of other specific ways that miscarriages can occur and help doctors get a better understanding of how to help couples who have trouble getting pregnant or maintaining a pregnancy.
This was a well organized and informative article. The study was explained well and all of the information was introduced in chronological order. In order to improve this article, the author could have explained the importance of healthy sperm in maintaining a pregnancy. It would be helpful to know exactly why and how miscarriages occur so often with some couples and not with others. It would also be helpful if the author discussed whether a man is born with damaged sperm or whether certain life events can cause sperm not to be viable. I also wish the author included any findings or success stories that have resulted from this study.

Tuesday, March 19, 2019

Christopher Hutchins
Mr. Ippolito - Current Event 15
3/19/19

Brown, David W. “Neptune's Moon Triton Is Destination of Proposed NASA Mission.” The New York Times, The New York Times, 19 Mar. 2019, www.nytimes.com/2019/03/19/science/triton-neptune-nasa-trident.html.
As we enter the month of February, we may also be entering the end of a long journey. NASA’s Trident Mission is beginning to give signs of its death. The last time Neptune’s moons were observed was Voyager 2 in 1989. Since then, the planet has been a top priority. It is planning to look into the ocean worlds. NASA continues to send signals, waiting for a response, but there are thousands of possibilities that lead to an end with the mission. Trident will look for more signs of life, since the region was expanded past Mars. There are many signs of water, or an ocean on the moons of Neptune. Triton must be perfectly aligned in order for the mission to be a success.
This article is not extremely relevant to our understanding of the world today. It is just an alert about the mission that will go to one of Neptune’s Moons. Although, by raising awareness to other space projects such as the Trident, which will help us have a much greater understanding of the solar system, there becomes a public knowledge of the scapecraft and the work it is doing for the benefit of science and the origin of our planet. In the near future, when Earth becomes uninhabitable, we will need to find a new home, or face extinction. Having a stronger understanding of the planets around us will help us in the future.

After reading this article, I was very pleased with the structure, and the resources incorporated into the read. This article is quick and to the point. It is surrounded by images. The writing of the article was slightly casual, which was effective to someone who may have previous knowledge of the mission, but to those learning about it for the first time, this may have been a mistake by the author. Other than readjusting the language to a broader target audience, this article was very well written and is important for people to educate themselves on.

Monday, March 18, 2019

Tens of Thousands of Heart Patients May Not Need Open-Heart Surgery


Cassidy Mullen
Ippolito C Even
Current Event 19
March 18,  2019

Kolata, Gina. “Tens of Thousands of Heart Patients May Not Need Open-Heart Surgery.” The New York Times, The New York Times, 16 Mar. 2019, www.nytimes.com/2019/03/16/health/aortic-valve-replacement-heart.html.


Open heart surgery is considered one of the most frightening surgical procedures as a patient,
but a new minimally invasive procedure called TAVR has proven effective in two large clinical
trials focusing on young healthier patients. The TAVR procedure was previously only used on
older patients who would not likely survive open heart surgery, but now it has proven to lower
risk of disabling strokes and death in younger patients. In this procedure, a replacement aortic
valve is inserted through the patient's groin and threaded to the heart where it is placed into
the site of the old valve.


This new surgical method may change the standard patient care. The TAVR procedure only takes
days to recover from instead of months and does not involve cracking the chest and stopping the heart.
The Article states, “As many as 20,000 patients a year would be eligible for TAVR, in addition to
the nearly 60,000 intermediate- and high-risk patients who get the operation now.” This gives
me hope for future less invasive medical procedures that could save thousands of lives.

I like that the article identifies the reason why younger patients have not typically received
the procedure in the past which is because it is more common for younger patients to have
two flaps to the aortic valve instead of three. I am still curious why younger patients without
this condition have not received the TAVR procedure earlier and if some patients with two
flaps can receive this new procedure. I really like that Kolata acknowledged the economic
side of the Tavr valves and the idea that they are more expensive but if more companies
produce these valves competition will go up and prices should go down.  

Squid Share a Colorful Trick With Peacocks

Sunday Ladas
Mr. Ippolito
AP Biology C-EVEN
19 March 2019

Greenwood, Veronique. “Squid Share a Colorful Trick With
Peacocks.” The New York Times, The New York Times, 7 Mar.

Squid Share a Colorful Trick With Peacocks
By: Veronique Greenwood

Scientists have recently named squids the chameleons of the ocean after lots of strenuous studies. Scientists have studied the peculiar structures in the squids skin that interact with light, trying to understand how the animals change color so swiftly and with such precision. A recent study suggests that squid are chromatophores, they were originally thought to be animals with pigment embedded in their skin, are also equipped with tiny reflectors made of proteins. Researchers believe that the source for this color pigments are from a protein called reflectin. To test this protein to ensure their findings. They found that Light strikes arrays of reflectin, bounces around and refracts out, producing colors. Scientists also found that the squid control the movement of the reflectin that is on the outside of the chromatophores. They also found that is the the same movements that control the opening and closing of the structure’s mouth, manipulating both kinds of color simultaneously.
Discovering the protein in the squid called reflectin and how they have evolved over time is a major discovery that still has a long way to develop with many unanswered questions. We already have little bits and pieces of the puzzle and are close to figuring out the sources for the reflectin protein to so quickly become activated in a squid and how the squid controls it. From the squid protein that scientists have discovered that have evolved they have been shocking discoveries, and the continuous discovered is just a reminder of the evolution in the world. Everything evolve, maybe humans will evolve even more, how will the chromatophores of the squid develop in 400 million years from now?
I thought that this article was constructed in a exceptional manor, I feel that the author made very good points and the authors tone showed the point of view she favoured. It was evident that the author was interested and really liked the topic he was writing about. However, I felt that Veronique Greenwood (the author) could have done a better job looking out the other side of this topic, I felt that he just continued to state how amazing the discovery was and there was nothing to refute it the point or a lot more evidence to back up her argument. Lastly, I thought that he could have included more information about how the new pieces of evidence that has been discovered rather than just touching on a few pieces with not explanation.  Overall, I felt this piece was very well written, however, it could have been looking at the other side of the argument.

Sunday, March 17, 2019

An Hour of Light and Sound a Day Might Keep Alzheimer's at Bay.

Anabel Maldonado
Ippolito C Even
Current Event #19
March 17th, 2019

Chen, Angus. “An Hour of Light and Sound a Day Might Keep Alzheimer's at Bay.” Scientific American, Scientific American, 14 Mar. 2019, www.scientificamerican.com/article/an-hour-of-light-and-sound-a-day-might-keep-alzheimers-at-bay/.

When someone develops a disease, they begin taking prescribed drugs to help minimize the problem. However, what if I told you that there was a possible cure for Alzheimer's, and no drugs were needed… Recently, Michael Chen released an article that spoke about a discovery that could possibly cure alzheimer's. He stated that “Virtually all new treatments have failed in clinical trials. But new research is looking beyond drugs to see what relief might come from a simple LED light and a speaker.” Although this may seem crazy and unrealistic, there is reasoning to why this may work. The pulsing sounds and alterations in light could reverse certain signals in our brain that trigger Alzheimer's. They tested this discovery with mice (in 2015), and after dissecting the mice's’ brains they realized that the biological causes for Alzheimer's decreased. Also, they realized that the mice’s cognitive skills improved significantly as well. Although these lights and sounds could possibly be a solution to this traumatic disease, the scientists still do not fully understand why this could reverse the brain waves (that cause Alzheimer's). However, this discovery could help millions of lives and be a major breakthrough in science.

This discovery is life-changing and very beneficial for our society.  Alzheimer's is a very prevalent and traumatic disease. In fact after doing outside research, according to Alzheimer’s Association the most common cause of dementia, a general term for memory loss and other cognitive abilities serious enough to interfere with daily life. Alzheimer's disease accounts for 60 percent to 80 percent of dementia cases.” The fact that Alzheimer’s affects 60 to 80 percent of dementia emphasizes the attention this disease knows. Not only would this discovery help the people facing this disease, it would also benefit their families. In addition, the idea that a disease could be cured without medications (prescription drugs) is life-changing… if successful, this could be a breakthrough for our world scientifically.

This article was very well-written. I thought that Chen’s clear summary of this discovery was perfect. It was clear, eye-opening and intriguing. He was able to succeed because he defined any complicated terms and included clear transitions. For instance, when he stated, “One batch of mice formed neurofibrillary tangles inside their neurons—dysfunctional knots of a protein called tau that can lead to the cell’s death. Another batch of the mice developed amyloid beta plaques—sticky heaps of protein that dam the flow of communication between neurons.” However, there were certain things that he could have improved upon. For instance, he spoke a lot about the experiments with mice which resulted in the audience losing interest towards the end. If he were to summarize the experiment more and illustrate more of passionate tone this issue could have been easily fixed.

Friday, March 15, 2019

Alyssa Lee
Mr. Ippolito
Current Event #19
3/13/19

Saey, Tina Hesman. “Geneticists Push for a 5-Year Global Ban on Gene-Edited Babies.” Science News, 13 Mar. 2019, www.sciencenews.org/article/geneticists-push-5-year-global-ban-gene-edited-babies?tgt=nr.
With the advent of new human technology, gene-editing has become a hot-button topic worldwide.  Scientists, geneticists, and other biologist have developed a way in which the genetic information encapsulated in the DNA of an early embryo can be modified to reflect certain more favorable characteristics in an unborn child.  While this has the potential for doing an incredible amount of good for the world (including the eradication of physical deformities or debilitating illness), the emergence of this revolutionary technology is also responsible for a harrowing ethical question to arise: should we allow gene editing?  If so, on what terms? In the article “Geneticists Push for a 5-Year Global Ban on Gene-Edited Babies” by Tina Hesman Saey, the author discusses the push from geneticists for a moratorium banning the birth of genetically-modified children for five years until the scientific community can come to a consensus as to the limits of gene-editing in babies.  Additionally, this would “buy time for scientists to further test and refine CRISPR/Cas9 and other gene-editing tools to make them safer.” CRISPR-Cas9 is a gene-editing tool that facilitates simplified and more accurate gene editing, specifically in CRISPR, specialized stretches of DNA. This utilizes Cas9, an enzyme that can be used to truncate pieces of DNA from the overarching strand.  Due to the controversial nature of gene editing (especially in light of the incident where Jiankui He, a scientist in China, edited the DNA in the genes of embryos that resulted in the birth of two baby girls), a large proportion of the scientific community has agreed to try and put forth a moratorium to apply a moral argument in support of a temporary ban on gene editing due to the fact that scientists are still uncertain as to any potentially malevolent side effects of gene editing and the ways in which this power can be used in a morally incorrect way.  Among the signatories of this moratorium include two of the original innovators behind the CRISPR gene editing technique, Feng Zhang from the Massachusetts Institute of Technology and Harvard University and Emmanuelle Charpentier from the Max Planck Unit for the Science of Pathogens in Berlin. Despite some backlash against the document for being essentially “useless” (due to the fact that it is simply a matter of semantics, geneticist Paul Berg of Stanford University is one of many who insist on its significance, commenting, “Given that both conferences declared as irresponsible this kind of experiment, but in fact, it went ahead, says that we needed a little bit more than just clucking at the end of things.  We needed to say a little bit more and actually call for a moratorium.”
Gene editing on its face is not necessary a “bad” thing- in fact, it has boundless potential for curing terminal human illness, ensuring a longer human life expectancy, and generally raising the quality of life for human beings across the globe.  I myself know many individuals who suffer from birth defects and ailments that could be solved with the advent of gene editing, from Down Syndrome to cancer. However, gene editing can also be used in malevolent consequences on human beings; for instance, what if someone were to find a certain race or physical characteristic “unattractive” or “inferior” and attempt to eradicate that characteristic from human genetics forever through CRISPR-Cas9?  Not only is this detrimental for human beings in terms of a reduction of genetic diversity, but it also presents the greater community with a moral conundrum: is it morally correct to be able to eradicate a gene completely from the gene pool simply because it is deemed “inferior” to others? Many, if not most, would argue no- while it would be immensely helpful to use CRISPR in order to cure an incurable illness, it is outrageous to think that we could essentially “murder” a child on the basis of an unfavorable characteristic.  This situation that we find ourselves in is precisely what makes gene editing one of the defining debates of our era. It is a particularly unique issue because it blends scientific advancement and ethical reasoning together to give the global community- both scientific and not- quite a bit to think about. This also demonstrates the importance of a five-year moratorium, during which the scientific community could both further experiment with CRISPR to ensure its safety as well as educate the general population in order to provide us with a better understanding of where we as human beings stand in the midst of this scientific crisis.  
Personally, I thought that the author did an excellent job offering a number of different perspectives on the controversial issue of gene editing.  Due to the heated atmosphere surrounding the debate, it is necessary to add a number of viewpoints concerning a possible moratorium. I also found the author’s description of the moral argument to be very compelling, especially since she added a number of quotes from experts in this field to bolster her ethos as a reporter.  However, one aspect that I found this article to be lacking was a more in-depth scientific summary of CRISPR and the incidents surrounding its creation. Providing some background and history on the topic would have appealed to more readers who were perhaps not as knowledgeable about the issue, as opposed to readers being forced to do some research beforehand.  Additionally, the author could have explained why the scientific community did not try to appeal to the court in order to pass a law prohibiting gene editing for five years rather than just a moratorium.
Alisa Kanganis
AP Biology
March 13, 2019
Current Event 19

Wallis, Claudia. “Are All Our Organs Vital?  .” Scientific American, www.scientificamerican.com/article/are-all-our-organs-vital/.\

There is a handful of organs that are regarded as vestigial, and consequently, are often removed during surgery without concern - the most well known being the appendix, gallbladder, and tonsils. However, recent studies show that these organs may have more of an impact than previously thought. For instance, a 2017 study led by Heather Smith, an evolutionary biologist at Midwestern University, observed the function of the appendix in 533 species of mammals. The results strongly suggest that the organ plays an immunological and gastrointestinal role. Essentially, the appendix harbors a layer of gut bacteria that aids the immune system in attacking microbiome illnesses. Without these bacteria, people are “two and half times more likely to suffer a recurrence of infection with Clostridium difficile”, a dangerous strain of gut bacteria that thrives in the absence of friendlier types. Therefore, it may be a good idea to take the effects of removing organs into account before doing so.
Removing vestigial (or thought to be vestigial) organs does not have a profound effect on society. I am sure a good amount of people contract gut infections due to the loss of their appendix, but I would also assume the number of people that fall ill with appendicitis is much greater. However, I think looking into the effects of losing an organ, even if it is thought to be useless, is very important. That way, if someone does have to remove one, they can at least know the risks and avoid them.  

The greatest flaw with the article is that the author did not address the effect of keeping a vestigial organ that may be causing damage to its host. For example, someone with appendicitis cannot just leave their appendix in as it may rupture and cause sepsis, which is more fatal than an infection involving Clostridium difficile. It seems to me that the consequences of keeping an inflamed vestigial organ greatly outweigh the benefits.

Tuesday, March 12, 2019

AP Biology Genetic Disease Projects

          For their third project, the AP Biology classes were asked to research a genetic disease. This was to include the spreadsheet they built to illustrate Hardy Weinberg Equation that show gene frequencies will remain almost constant if their FIVE requirements are met. Stable gene frequencies would mean that evolution would not occur. Their presentation involved the research they completed on the disease they chose to model.

           The final presentation must include the following sections/information: 

History of the Disease

         A description of when the disease was first identified and by whom.

Symptoms of the Disease

          A description and discussion of how the disease affects those who have the disease and also how it may affect their families.

Cause of the Disease

          A description and discussion of the known/hypothesized etiology of the disease. Be sure to be very specific in this section, if possible describe the exact “mutation” that is thought to produce the ineffective products that are at the root of the disease.


Treatments for the Disease

          A description of any procedures that may be used to alleviate/cure the affected individual’s symptoms.

Identification of the Disease

          A description of any protocols that may be used to determine carriers and/or individuals who might have the disease and the probabilities of their passing the disease to their offspring.

Bioethical Considerations

          A description and discussion of any ethical problems/considerations that may arise in relation to the disease.

The following students' Powerpoint presentations can be seen by clicking on the provided links, which will upload their Powerpoint/Google/Prezi Shows:

Charlotte C. - Paranoid Schizophrenia
Clara D. - Open-Angle Glaucoma
Sunday L. - Anophthalmia
Anabel M. - Fragile X
Cassidy M. - Neural Tube Defects
Raphael M. - Cerebral Palsy
Anna N. - Werner Syndrome
Jack P. - Sickle Cell Anemia
Isabella P. - Cooley's Anemia
Ella S. - Bipolar Disorder
Szilvia S. - Von Rechlinghausen's Neurofibromatosis
Harry V. - Diabetes

James A. - Cleft Lip/Cleft Palate
Alexandra B. - Familial Mediterranean Fever
Joseph D. - Menkes Disease
Luke F. - Beta Thalassemia
Michael G. - Hemophilia
Christopher H. - Coloboma
Alisa K. - Fatal Familial Insomnia
Gabrielle L. - Schizophrenia
Brian L. - Cystic Fibrosis
Paul M. - Color Blindness
Caitlin M. - Alzheimer's Disease
Sofia R. - Down Syndrome
Finn S. - Charcot-Marie Tooth Disease
Grace S. - Asperger's Syndrome
Anton T. - Fibrodysplasia Ossificans Progressiva

Three students chose to create triptych posters to present their diseases:
Layla B. - Marfan's Disease
Alyssa L. - Von-Hippel Lindau Disease



Emily P. Alpha-1 Antitrypsin Deficiency