Day 52, Sunday, July 14, 2012 to ~ Family and Friends, in ~ a cabinet the DNA is maintained in structures called chromosomes. These space a mix of DNA and protein that eventually package the DNA so that when a cell divides right into two, every daughter cell gets precisely 1 set of the set of DNA instructions. My career has actually been committed to studying the affect of pollutants prefer chromium, depleted uranium, nanoparticles, nickel and other chemicals on chromosomes and the DNA in ~ them. That is a passion I discovered and an approach I learned under mine mentor, Steve Patierno, who shares the very same passion (Thanks Steve!). When working v Steve, and also following my years v him, my significant focus was understanding how these chemicals rotate normal cells into tumor cells by transforming chromosome structure and number, damaging DNA and altering the moving mechanisms that regulate and protect this structures. We space still extensively associated in this work and also have expanded it right into pioneering the examine of just how pollutants damages chromosomes and also DNA in marine species. Each types has a certain set number of chromosomes. Humans have actually 46 chromosomes. 22 matched pairs, 11 the come native mom and also 11 that come from dad. Add to 1 pair the sex chromosomes recognized as the X and Y chromosomes. Females space XX getting one X from every parent. Males space XY gaining an X from mom and a Y indigenous dad. Sperm gimpppa.orgs have 42 chromosomes, 20 matched bag plus the two sex chromosomes. The particular variety of chromosomes is not unique to one types as for example other gimpppa.orgs have 42 chromosomes, yet the details number is distinctive to a varieties as sperm gimpppa.orgs always have 46. This number is strict regulated and maintained. Alterations in this number have the right to have dramatic consequences. Down’s syndrome is a repercussion of a one extra chromosome (number 21). Lung cancers frequently have much more than 60 chromosomes. You can harvest and also prepare cells so the you can see their chromosomes. Around speaking, in this preparations – the chromosomes look type of prefer an “X” or if the arms space closed one “I”. You have the right to chemically law the chromosomes in the laboratory to disclose a sample of dark and light bands the is certain to every pair the chromosomes. The patterns are not characterized as merely as 1 dark complied with by, 2 light followed by 1 dark or anything prefer that. There room too many. Instead, castle are explained in an ext abstract terms. Because that example, chromosome 18, when banded, looks choose a gummi bear. In our lab, the is known more as the Wallace chromosome offered Captain Bob’s legendary passion for eat gummi bears. The X chromosome is well-known as the “girl in a bikini” due to the fact that the most prominent dark bands are put where one might imagine a bikini. The nicknames continue for every pair and also really aid teach chromosome recognition. Sandy excels at this analysis. The bag of banded chromosomes can be arranged on a item of document or computer system screen right into a template dubbed a karyotype that approximately organizes lock from largest to smallest. The karyotype is distinctive to each species. I have attached a photo of a human being karyotype the Sandy made. This one is male v an X and also Y chromosome. Have the right to you check out the Wallace gummi be afflicted with chromosome (#18) and the girl in the bikini chromosome (X)? Johnny and also I are working to specify a variety of gimpppa.org karyotypes consisting of one for sperm gimpppa.orgs. We have actually not however devised clever names for their chromosomes together we room still finding out them. Damages to the framework of the chromosomes, which reflects up as an alterations in the banding pattern, have the right to have as dramatic after-effects as alterations in chromosome numbers. Our culture has made decision that the influence of damaging chromosomes is so significant that testing for a chemical’s capability to damage them is a standard test for evaluating the security of new drugs and determining wellness risk. Both the us Food and Drug administration (FDA) and also the US environmental Protection firm (EPA) include chromosome damage testing together a compelled test in your protocols. If a pharmaceutical firm develops a brand-new drug and it loss chromosomes, it will not be approved by the FDA for use. When a agency is arising a drug and it division chromosomes, they stop its advancement and move on to another. The only exemption is the rare instance when the condition is for this reason lethal the threat of chromosome damages is the lesser of two evils. We are applying these very same tests come the Gulf gimpppa.orgs. We room finding the chromosomes in part gimpppa.orgs space affected. This outcome is an additional answer to that repeated inquiry – What space you finding? We have actually grown cabinet lines from every gimpppa.org and assessed the condition of their chromosomes. The analysis reveals various groups of gimpppa.orgs. Some gimpppa.orgs appear to it is in normal. Others show up to have actually their chromosomes affected. The is a major concern as aberrant chromosomes have the right to lead to plenty of long term an unfavorable outcomes. We think we have actually ruled out feasible experimental artifacts. Thus, it argues something out below is influence the gimpppa.orgs top top a basic level. For united state in the way Lab, it currently becomes a game of moving whodunit together we effort to piece together the components that may explain what is leading to this effect. It might be the metals. It could be the oil. It can be the dispersants. It might be some combination of them. We shall find out. I don’t think its worldwide warming. But, nevertheless of why, the outcome is no good. It to be a sluggish day at sea today. The type of day the lulls you right into a quiet state. No gimpppa.orgs on the array. No dolphin on the bow. Just the general routine that a team ascending and also descending the mast trying to find gimpppa.orgs in a vast ocean space. Us did check out one, possibly two. That created some excitement as it was a beaked gimpppa.org, maybe two. But, alas it to be too much off and also while we uncovered it twice (or two different gimpppa.orgs as soon as each), we might not gain close sufficient to sample the nor might we remain with it any kind of further. We additionally saw a small sea turtle in the Sargasso weed. Us did collect part samples together this team go its an initial Sargasso weed repertoire of the leg (Picture attached). So a couple of exclusive right to a day filled v the rate of a stable routine. I’ll end tonight with the sunset (picture attached) great night. John P.S.


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If you want to view our place on Google Maps we space at: 27.752N, 88.877W just paste in the coordinates and click search If you desire to review the previous job of this messages- they are posted in ~ www.usm.maine.edu/toxicology/gulf and click ~ above “read logs here”. — man Pierce Wise, Sr., Ph.D.