Archive for category Research
I was interviewed, along with other fellow Chilean scientists, for a piece (in Spanish) on the publish-or-perish culture, the tyranny of the Impact Factor and the pressure on scientists to publish in top journals for career advancement, among other things. The article, written by Tania Opazo and entitled “The Tyranny of Scientific Publications”, appeared today in “La Tercera”.
Go check it out!
I was asked to write a letter of recommendation for someone. This is the first one I’ve ever written. Well, technically, I’ve written letters of recommendation before…but for myself; some professors I’ve asked letters from, have asked me to provide a draft they could then edit. I know this is usually frown upon by some people, but apparently this is more common that I imagined.
Anyway, let’s rephrase my statement from before: this is the first letter I’ve written for someone else. A former undergraduate student in our lab asked me to write a letter for her to apply to grad school in the US. It was great to be asked to do this, but agreeing to write one is a big responsibility. The idea is to describe the applicant’s strength and weaknesses, with regards to the program they are applying to; to describe whether they are a good fit for the program and mention why. Agreeing to write one, in my opinion, should be done with the idea that the writer is actually supportive of the applicant’s plan: you want the person to be able to be accepted into the program and I guess that if you can’t really recommend the person in an honest way, maybe you should simply decline to write it or mention your reservations to the student and let he/she decide whether he/she still would want you to write it.
I’m positive I’ll be writing more letters in the future, so I took this opportunity to study a little more about writing effective letters. I read a bunch of sample letters online and also read an addendum to the HHMI book “Making the Right Moves: A Practical Guide to Scientific Management for Postdocs and New Faculty”, entitled “Writing a Letter of Recommendation”. It was very useful and I recommend it. It includes a bunch of tips which were very helpful for knowing what to mention and what not to mention in the letter.
Basically I started by asking the student about her plans and why she wanted to join the program. In the end, I simply asked for her intention letter which included all this information. Knowing her goals and motivation for the specific program was very useful for drafting the letter. Additionally, I asked her to send me her CV and asked if there was any particular aspect she wanted me to specifically discuss in the letter. In her case, she wanted me to center my discussion around her research experience. Note that I did not ask her to tell me which aspect I should compliment; simply which one she wanted me to focus on. I asked this because people usually get letters from different people highlighting different aspects of their CV/training.
What I wrote
In the letter, I basically introduced myself and described my relationship to the student. In my case, we shared a lab bench for over a year and I taught a few classes in which she was a student. I then mentioned how I ranked her among all undergrads I’ve met in a similar setting (i.e. in the lab). People usually do this by saying something like “In my opinion, candidate x is among the top 5 percent of the students I have known”. I then went on to describe the project she worked on while in the lab and her findings, highlighting not only the technical side of the project (her knowledge of lab techniques, the ones she had to implement and troubleshoot, etc.), but also aspects of her personality (personal attributes) that I considered were relevant for its development (i.e. can work independently, has a critical mind, is determined, etc). The idea is to be specific, to denote that you truly know the candidate. I then discussed writing and oral communication skills, as they relate to how she communicated her scientific findings.
I thought it would also be relevant to mention some shortcomings she had when she joined that lab that have now been improved, with specific examples as to how this has changed. As stated in the HHMI document I mentioned above, “You don’t just have to describe the candidate as he or she is right now—you can discuss the development the person has undergone”.
Then I discussed how good a fit her skills are to the specific program she applied to and gave my impression about her likelihood to be a successful student in that program.
I finished the letter summarizing my enthusiasm for the candidate and highlighting the skills I think can make her a good asset to the program. The last line was just my offer to help if further information about the candidate was required. In all, the letter was 2 pages long.
I think I did an acceptable job. When the time comes that I start reading letters from others, I’ll probably learn more tips on writing letters, and I’ll try to make them more effective and help students as much as I can.
I hope she gets in!
Together with Paulo Canessa and Luis Larrondo, we wrote an extensive review on circadian rhythms in fungi, which was published in Advances in Genetics. We focused on the well-characterized clock of the ascomycete Neurospora crassa, describing the molecular basis of its pacemaker, together with how it synchronizes with the environment and how it controls the rhythmic expression of thousands of genes. We mostly centered our discussion on recent research on all of these topics. We also described several studies reporting rhythms in other fungi and towards the end of the article, we focused on the clock of the pathogenic fungus Botrytis cinerea, for which we have recently described a functional circadian clock that plays a major role in determining the outcome of the Arabidopsis-Botrytis interaction.
Here’s the info:
Around the Fungal Clock: Recent Advances in the Molecular Study of Circadian Clocks in Neurospora and Other Fungi
Advances in Genetics
Available online 27 October 2015
In Press, Corrected Proof
Alejandro Montenegro-Montero, Paulo Canessa, Luis F. Larrondo
Night follows day and as a consequence, organisms have evolved molecular machineries that allow them to anticipate and respond to the many changes that accompany these transitions. Circadian clocks are precise yet plastic pacemakers that allow the temporal organization of a plethora of biological process. Circadian clocks are widespread across the tree of life and while their exact molecular components differ among phyla, they tend to share common design principles. In this review, we discuss the circadian system of the filamentous fungus Neurospora crassa. Historically, this fungus has served a key role in the genetic and molecular dissection of circadian clocks, aiding in their detailed mechanistic understanding. Recent studies have provided new insights into the daily molecular dynamics that constitute the Neurospora circadian oscillator, some of which have questioned traditional paradigms describing timekeeping mechanisms in eukaryotes. In addition, recent reports support the idea of a dynamic network of transcription factors underlying the rhythmicity of thousands of genes in Neurospora, many of which oscillate only under specific conditions. Besides Neurospora, which harbors the best characterized circadian system among filamentous fungi, the recent characterization of the circadian system of the plant-pathogenic fungus Botrytis cinerea has provided additional insights into the physiological impact of the clock and potential additional functions of clock proteins in fungi. Finally, we speculate on the presence of FRQ or FRQ-like proteins in diverse fungal lineages.
Embracing minimal guidelines for the reporting of RT-qPCR experiments: responsibility lies on both ends
In mid-2012, Stephen A. Bustin, Jo Vandesompele and I decided to send a letter to the editor of a glam magazine asking for journals to demand authors to provide at least minimal information for the critical evaluation and reproducibility of published RT-qPCR experiments. The lack of information regarding these experiments is inversely proportional to the IF of the journal: the higher the IF, the lower the amount of information provided for these experiments (See Nat Methods. 2013 Nov;10(11):1063-7). It was no surprise then, considering that they were the ones we targeted in the letter (although not explicitly), that glam journals (you know which…) refused publishing the letter.
I found the letter searching for something else in my computer and decided to share it with you, just as it was written back in 2012. The main theme is as true as it was back then.
Stephen A. Bustinb
Jo Vandesompele c
a Department of Molecular Genetics and Microbiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile.
Email: email@example.com. Tel: (+562) 6862348
b Queen Mary University of London, UK
Email: firstname.lastname@example.org. Tel: (+44) 2073777000
c Center for Medical Genetics, Ghent University, Belgium
d Biogazelle, Zwijnaarde, Belgium.
Email: Joke.Vandesompele@UGent.be. Tel: (+32) 479353563.
To the Editor:
Reverse transcription real-time quantitative PCR (RT-qPCR) is currently the most widely used molecular method for the detection and quantification of RNA. RNA integrity and purity, primer sequences and their specificity, assay efficiency and identification of appropriate reference genes are just a few of the essential parameters that must be assessed and reported when using this quantitative technique. Most authors however, fail to include them, either in the methods or the online supplementary sections, with some arguably not even having performed the appropriate controls. As has been previously reported, this can lead to flawed data and wasted efforts in trying to reproduce results that can be, in some cases, artifacts and thus not biologically relevant1.
The MIQE guidelines2,3 were proposed to enhance experimental accuracy and transparency and to enable the research community to assess reported data and reproduce published qPCR experiments. The guidelines should be considered a complete “checklist” to be used as a reference for the reporting of results. While the response to these guidelines has been largely positive, in both commercial and research settings, most currently published articles that include qPCR experiments fail to properly report experimental procedures.
Although it is the authors’ task to embrace minimal guidelines that allow for reproducibility and transparency of their studies, journal editors have a responsibility to demand such information. Even though some publishers have implemented the MIQE guidelines or at least the bulk of the recommendations, many top-tier journals continue to publish research that grossly lacks the required information not only to reproduce the reported experiments, but also to evaluate properly the conclusions derived from them. Given that the number of retractions is on the increase, that the majority of retractions are caused by poor experimental protocols and that once published in the peer-reviewed literature, even a rebuttal does not affect a paper’s frequency of citation, we would like to issue a wakeup call to journal editors and publishers.
We urge journals to demand that all manuscripts include such minimum information, in the form of the MIQE or other guidelines, to ensure the accuracy and reproducibility of the reported results. The use of online supplementary sections makes the often used “space constraint” argument no longer valid.
1. Lanoix, D. et al. Quantitative PCR Pitfalls: The Case of the Human Placenta. Mol Biotechnol (2012).
2. Bustin, S.A. et al. The MIQE guidelines: minimum information for publication of quantitative real-time PCR experiments. Clin Chem 55, 611-622 (2009).
3. Bustin, S.A. et al. Primer sequence disclosure: a clarification of the MIQE guidelines. Clin Chem 57, 919-921 (2011).
ENCODE Project Consortium et al. 2012. An integrated encyclopedia of DNA elements in the human genome. Nature 489: 57-74.
Graur D, Zheng Y, Price N, Azevedo RB, Zufall RA, Elhaik E. 2013. On the immortality of television sets: “function” in the human genome according to the evolution-free gospel of ENCODE. Genome Biol Evol. 5:578-590.
Eddy S. 2012. The C-value paradox, junk DNA and ENCODE. Curr Biol. 22:R898– R899.
Eddy SR. 2013. The ENCODE project: missteps overshadowing a success. Curr. Biol. 23: R259-61.
Eddy SR. 2013. Is junk DNA bunk? A critique of ENCODE. Proc Natl Acad Sci U S A. 2013 Apr 2;110(14):5294-300.
Kellis M et al. 2014. Defining functional DNA elements in the human genome. Proc Natl Acad Sci U S A. 2014 Apr 29;111(17):6131-8.
Niu D-K, Jiang L. 2013. Can ENCODE tell us how much junk DNA we carry in our genome? Biochem Biophys Res Commun. 430:1340–1343.
Palazzo AF and Gregory TR. 2014. The Case for Junk DNA. PLoS Gentics 10 (5): e1004351
Doolittle, WF, Brunet TDP, Linquist S, Gregory TR (2014). Distinguishing between “function” and “effect” in genome biology. Genome Biol Evol (2014) doi: 10.1093/gbe/evu098
Quick and simple post, considering it is Jan 1st and I’m still tired from last night, and the fact that I just came back from, you guessed it, the lab.
Anyway, I wanted to know what the most recurring topics were on the top two glam journals during 2013, so I obtained the 2013 PubMed-indexed abstracts from Nature and Science using EBOT and then used Wordle to generate a word cloud.
Here are the results:
It’s pretty easy to do it for any other journal or for any other query in PubMed using Ebot. If you want to do something similar for say, your country or institution and you need help, let me know.