So I thought this
article was really interesting since Dr. Choudhary always talks about this
sort of thing in his genetics class. The article reminds us that there are only
two significant genes which are contributed by the Y chromosome. The question,
then, is whether or not the Y chromosome is still necessary. With recent
research, genes were taken from infertile male mice with only the two
contributed Y-linked genes and injected the immature spermatids into oocytes in
a lab setting. In the infertile male mice, the genes were still expressed, but
the gametes were never fully developed. The embryos were then transferred to
surrogate females and offspring were produced. This was also repeated using
additional Y-linked genes to test whether the addition of such genes resulted
in even greater success. The addition of genes increased the amount of viable
offspring. All offspring were also fertile. This shows that the Y chromosome
itself is simply the vessel which carries these genes. Hypothetically speaking,
this may mean that the X chromosome, if ever to obtain and carry these genes,
may one day take the place of the Y chromosome. This was all conducted using
advanced technology, though, so it’s still a long ways off. Talk about changing
the textbooks, though! Can you imagine if this were to occur in a few
generations (which is super unlikely, but humor me) how students would have to
be taught that the Y chromosome USED to determine the sex of a mammal?! We also
couldn’t joke anymore that everyone started out as a female, since it would
still basically be true!
Friday, November 22, 2013
Sunday, November 17, 2013
A Suicide Soapbox
First of all, this blog post is in no way relevant to what
we typically discuss; I simply would like to discuss something that is
important to me in hopes to maybe help someone at some point in time. I am
hoping to help bring awareness to this topic so that if ever faced with a
similar situation, you all could potentially help to save a life.
Tomorrow marks one year since my cousin’s premature death.
AJ was 22 years old who loved our country, life, and those people he shared it
with. AJ took his own life one year ago. This event was the fifth attempt at
taking his life, and he was pronounced brain dead a few hours after the event.
Despite being his fifth attempt at suicide, this was unexpected to our family.
The first time AJ attempted to take his life was as a senior in high school.
That time, he took a bunch of pills and wrote notes. He ended up vomiting a lot
of the pills back up, and the rest were pumped from his stomach since he was
quickly found after this attempt. A second attempt at his life was made about a
year or so later when he slit his wrists. Again, he lived through the attempt
and went on living life. Each time, AJ was provided help and counsel and once
he was “better” everyone went about their business. Each time, we didn’t know
why he was doing these things. Each time, he lived and perhaps we took that all
for granted.
Last year, we received a call from my uncle just a few days
before Thanksgiving. He told us that AJ had died. While our family had been
quite disconnected in recent years, this did not take away from the situation
at all. Later, we learned of the other two attempts at suicide, but again, no
why. To this day, we still do not know why AJ chose to take his life and we
probably will never know. If you had met him, you would have never guessed
these things about his past, or that he would end up taking his life. He was
the life of the party, he lit up the room whenever he entered, and he was one
of the comedians of the family. While we were not particularly close, with the
age gap between up and the distance between where we grew up, AJ was still my
cousin. Growing up, all of us were close and they say that cousins are your
first friends in life. AJ’s death really hit me, and it still is saddening to
this day.
If someone you know has voiced contemplating suicide, do not
take it lightly. Even if they get mad at you for helping or saying something,
don’t sit back and possibly let it happen. React, no matter their reaction,
because you just might save their life. I am a firm believer in everything
happens for a reason, but maybe your helping someone and saving their life has
a reason greater than of them taking their life. There are numerous websites, programs, and
hotlines that could be of great use. Also, you never know when just talking to
someone could make a difference.
Thanks for reading my story and taking it seriously. Even if you don’t
think this is relevant to you, you may unfortunately face this situation one
day. If this helps even one person, then there was a greater reason for writing
this post.
Friday, November 15, 2013
Antibiotic Resistance is on the rise
Antibiotic resistance is on the rise! As if we didn’t
already know that. Scientists have shown though, that antibiotic resistant
bacteria are found in the gut microbiome of children as young as six months
old. This
study sampled children from 6 months of age to 19 years. From this, over
2,500 resistance genes were found to be present in the normal gut flora of
bacteria. That is a 30% increase in the number of known resistance genes. This is
a growing problem since children receive so many antibiotics in this age range,
so these healthy flora are repeatedly being exposed to these drugs. Also, the
fact that children as young as six months were found to have resistant bacteria
in their gut microbiome is pretty disturbing. Infant guts are colonized over
time from their exposure to those individuals around them and by things they
touch and ingest. If these children who are barely old enough to start eating
soft foods have resistant bacteria in their guts, that means that antibiotic
resistance is really all around us. Scary stuff, since MRSA has been found to
kill more people in the U.S. annually than HIV.
Thursday, November 7, 2013
Baby Bias
A recent study
has shown that some doctors are making varied recommendations to their pregnant
patients based upon the method of conception. If women underwent assisted
reproductive technological (ART) conception, the doctors were less likely to
recommend that certain tests be conducted on the baby. Women who become pregnant
over the age of 35 are often more likely to have their babies tested for Down’s
Syndrome and other disorders/diseases, but women of this age group who did not conceive
naturally were not as highly referred to these tests.
These invasive procedures could put the baby at risk, so I
can understand how parents who had difficulty with fertility would be uneasy
with these procedures. I can’t understand, however, why doctors would not recommend
these procedures. As a doctor, why wouldn’t you recommend such routine tests
and just make sure the parents are well aware of the risks involved, then let
them make that decision? Some of these tests are so routine now that there isn’t
even an age range in which they limit the testing to. To me, this seems as
though the physicians are letting emotional or psychological factors influence
their job. Like I said, I understand the parents’ being uneasy, but why wouldn’t
the doctor want to educate their patients to the best of their abilities?
While the results of the tests and how the parents choose to
face such results are negligible for my argument, I want to know how you would
feel if you were a patient. Regardless of what the tests tell you, would you
still want your doctor to recommend such tests if you had conceived via ART
instead of naturally? Guys, you include your input too! Just because you don’t
carry the baby, it doesn’t mean you can’t have a say-so. (At least for the sake
of this blog!)
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