scholarly journals André Boivin: A pioneer in endotoxin research and an amazing visionary during the birth of molecular biology

2019 ◽  
Vol 26 (3) ◽  
pp. 165-171
Author(s):  
Jean-Marc Cavaillon

André Boivin (1895–1949) started his career in Marseille as a biochemist. Soon after the discovery of insulin, he worked on its purification, allowing for the treatment of local patients. He later moved to Strasbourg and set-up a microtitration technique of small carbon molecules and a method for quantifying purine and pyrimidine bases. His main scientific contribution occurred in Bucharest, where he was recruited to organize the teaching of medicinal chemistry. Together with Ion and Lydia Mesrobeanu, at the Cantacuzene Institute, they were the first to characterize the biochemical nature of endotoxins, which he termed the “glucido-lipidic antigen.” After joining the Institut Pasteur annex near Paris, he worked with Gaston Ramon pursuing his research on smooth and rough LPS. Additionally, with Albert Delaunay, he researched the formation of exotoxins and antibodies (Abs). He was nominated assistant-director of the Institut Pasteur in 1940. He initiated research on bacterial DNA and RNA, and was the first to hypothesize on how RNA fits into gene function. In 1947 he moved for a second time to Strasbourg, accepting a position as a Professor of Biological Chemistry. After his premature death at the age of 54, the French academies mourned his loss and recognized him as one of their outstanding masters of biochemistry, microbiology, immunology, and molecular biology.

2001 ◽  
Vol 114 (10) ◽  
pp. 1797-1798
Author(s):  
K. Plant

Essential Molecular Biology, Vol. 1, 2nd edn edited by T. A. Brown Oxford University Press (2000) 240 pages. ISBN 0–19-963642-7 pound29.95 I have heard it said (though not to my face) that practical molecular biology is somewhat akin to cookery, and I have to admit (though not to my fellow Molecular Biologists) that there is an element of truth in this. Of course, our ovens are cooler, and our pie dishes smaller, but often it is a case of mixing ingredients in the right proportions and baking at 37 degrees C for an hour. In this book Brown becomes the Delia Smith of molecular biology, starting with how to boil an egg, before proceeding to more complex recipes. It is utterly and unashamedly aimed at the complete novice. As more and more branches of biology use molecular techniques, and as a constant flow of graduates take up the yoke of research, there will always be a demand for this type of manual. Of course, it is possible to find variants of a lot of these methods on the Internet, but, as these often include only the protocol, the complete novice is probably better off with a specifically designed manual. Another option is to go for the kit approach, but, in the same way as opening a tin of beans doesn't make you a chef, I whole heartedly agree with Brown when he says, ‘do not get the idea that using kits is the same as being a molecular biologist.’ In most branches of biology a bit of genuine molecular expertise can only enhance one's future job prospects! One of the things I liked about this book is its no-nonsense style, particularly those chapters written by the Editor. There is plenty of sound advice, not just on the molecular techniques but on how to be a good scientist in general. Although the advice starts with the basics, it isn't patronising to those experienced in other fields. One piece of advice that particularly tickled me was that, if your hand is too unsteady to load a gel, you should give up caffeine; I'm not sure whether the pain would be worth the gain! The first chapter deals with all the basic issues, from planning (not just how to do it, but is it worthy of your time, which is something we should all think about occasionally) to safety (which nasties you'll be using, what precautions to take, with internet sites referenced to fill in the details) and what equipment you'll need to run the experiments. In a nutshell, the rest of the book deals with microbiology for molecular biologists and molecular biology for everyone else. This includes DNA and RNA isolation, electrophoresis and cloning (generating, propagating and identifying recombinant DNA molecules, not the Dolly-the-sheep variety). There is a second volume to the set, which (based on the contents of the first edition) should cover making and screening libraries, the polymerase chain reaction, sequencing and gene expression studies. Bear in mind that to get very far you will need to buy the second volume, which is not yet published. It has been more than a decade since the first edition of this well-known and respected manual was published; so one would think its first update is about due. However, compared with the first edition, most chapters have very few changes. This is probably in the nature of such a basic manual - for example, good microbial practice doesn't change much. Only a couple of chapters have been extensively rewritten; those describing DNA extraction now include more recent resin-based methods. So to the crux of the matter: would I recommend buying it? Well, if you're a complete novice with little backup, I definitely think it is worth investing in a decent manual, and this one does have a nice comfortable feel to it. If you've already got a copy of the previous edition and are wondering whether to upgrade, I would say that the few improvements in these very basic techniques do not really make it worth spending the pound30 that this volume costs. That said, I rather suspect that the second volume, which deals with more complex techniques, will show far more technical advances and should complete your progression from culinary incompetence to cordon bleu.


2017 ◽  
Vol 114 (11) ◽  
pp. 2898-2903 ◽  
Author(s):  
Bharat N. Gawande ◽  
John C. Rohloff ◽  
Jeffrey D. Carter ◽  
Ira von Carlowitz ◽  
Chi Zhang ◽  
...  

The nucleobases comprising DNA and RNA aptamers provide considerably less chemical diversity than protein-based ligands, limiting their versatility. The introduction of novel functional groups at just one of the four bases in modified aptamers has recently led to dramatic improvement in the success rate of identifying nucleic acid ligands to protein targets. Here we explore the benefits of additional enhancement in physicochemical diversity by selecting modified DNA aptamers that contain amino-acid–like modifications on both pyrimidine bases. Using proprotein convertase subtilisin/kexin type 9 as a representative protein target, we identify specific pairwise combinations of modifications that result in higher affinity, metabolic stability, and inhibitory potency compared with aptamers with single modifications. Such doubly modified aptamers are also more likely to be encoded in shorter sequences and occupy nonoverlapping epitopes more frequently than aptamers with single modifications. These highly modified DNA aptamers have broad utility in research, diagnostic, and therapeutic applications.


2010 ◽  
Vol 31 (3) ◽  
pp. 142 ◽  
Author(s):  
Stephen Davis

The identification of fungi in a general microbiology laboratory using traditional techniques has always been problematic for several reasons. These include the requirement for trained personnel to identify the fungi, as well as the fact that many fungi take much longer than bacteria to grow, making identification of these organisms in a timely fashion difficult. An additional complication is that some fungi do not show characteristic structures, making identification by traditional techniques difficult, if not impossible. DNA sequencing for the identification of fungal cultures can be easily established in a laboratory that is set up for bacterial DNA sequencing. This technology, when complemented with appropriate levels of training in classical fungal identification, will extend the mycological capabilities of a general microbiology laboratory.


2019 ◽  
Vol 8 (2) ◽  
pp. 179
Author(s):  
BAYU ARYA BAGASKARA ◽  
I GEDE PUTU WIRAWAN ◽  
MADE SRITAMIN ◽  
I GUSTI AYU DIAH YUNITI

Citrus (Citrus nobilis L.) Propagation Through Culture In Vitro Using Seed From Infected Plants Of Citrus Vein Phloem Degeneration (CVPD) Disease. The sample was taken in Belancan Village, Kintamani District, Bangli Regency, and invitro culture was conducted in UPT. Genetics Resource and Molecular Biology Laboratory in February to June 2018. This research purposes were to get the new citrus plant from citrus seed infected of CVPD disease explants with culture in vitro and found the presence of the bacterium Liberobacter asiaticus in results of citrus plants culture in vitro. The sampling method is using plants appearance. Obtained sample 1 is a plant that shows severe symptoms of CVPD disease and sample 2 plants that show no symptoms of CVPD disease. Seed Sample is cultured with MS0 medium for 8 WAP then proceed to acclimatization. The results of this research showed that the seed explants from both samples were able to grow well and did not have the characteristic of CVPD disease, but explant seed sample 2 in vitro culture result showed that the bacterial DNA bacterium Liberobacter asiaticus pathogen CVPD disease does exist in length 1160bp, so it cannot be expected to produce CVPD-free crops.


1950 ◽  
Vol 7 (19) ◽  
pp. 35-61 ◽  

The sudden and premature death of Clifford Dobell on 23 December 1949, in London, deprived the scientific world of one of the outstanding protozoologists of all time—a man who had made important and lasting contributions to biology, medicine and the history of science. Clifford Dobell (though christened Cecil Clifford, he never used the first of these names) was born on 22 February 1886 at Birkenhead, in Cheshire. He was the eldest son and the second of the five children of William Blount Dobell (1859-1927), and his wife Agnes née Thornely (1852-1942). The Dobells are an ancient English family, probably descended from Angles who settled in Kent and Sussex before the Norman Conquest. Their name is in Domesday Book but its derivation is not certainly known; in the older records it is spelt variously, but since about 1600 the present form has been usual in the main branch of the family, to which Clifford belonged. Clifford’s father, William Blount, was left motherless when only three years old. At the age of seventeen, when his father emigrated to America with his second family, he went to Birkenhead, where he worked in the office of the Lancashire Coal Company for a few years, until he set up as a coal merchant on his own account. In his twenty-fourth year (1883) he married Agnes Thornely, who also early became an orphan and was brought up by her grandfather, Samuel Thornely of Liverpool, and a spinster aunt, Caroline Thornely. Agnes had a good education for a girl of her generation—at school she learnt German, French and some Italian, and had excellent instruction in music. She was very musical indeed, and could play the piano, the violin and the organ well enough to make her wish to take up music professionally after leaving school: but her grandfather would not hear of it. Clifford’s love and appreciation of music were undoubtedly inherited from his mother: his father was quite unmusical.


2020 ◽  
Vol 64 (5) ◽  
pp. 463-470
Author(s):  
Sule Canberk ◽  
Verena Tischler ◽  
Marianne Engels

In June 2019, a lung symposium was held at the 42nd European Congress of Cytology in Malmö, Sweden. Due to the current importance of cytological samples in the diagnoses and molecular analysis to set up the utmost management of lung cancer patients, cytologists from different countries shared the experience of their institutions. The place of the cytological samples gains more and more importance on the potential long-term survival gain through personalized medicine and this harbors the improvement of the guidelines both in pathology and cytology field. In this symposium, the new 6-tiered reporting system for pulmonary cytology proposed by the Papanicolaou Society of Cytopathology and detailed cytomorphological approach to lung carcinoma including lookalike lesions and DNA- and RNA-based analysis of cytology material have been discussed. The cytopathologist plays a pivotal role in ensuring success of a correct triage for the cytology material to be sure of the adequacy and quality of the yield from the rapid on-site evaluation till the report which should encompass molecular profile in rational patient management.


2020 ◽  
Vol 51 (6) ◽  
pp. 593-604
Author(s):  
Maja Zakošek Pipan ◽  
Janko Mrkun

The long-standing hypothesis that the neonatal microbiome is acquired during and after birth has been challenged by recent studies in humans using advanced molecular technologies, which identified bacteria and bacterial DNA and RNA in amniotic fluid, placenta, and meconium. Similar studies have recently been conducted on canine neonates, giving a description of the gut microbiota of newborn puppies and a comparison of different types of parturition on theirdevelopment. In this review, we summarize the current knowledge of microbiome and microbial alterations in the canine gut, vagina and oral cavity throughout pregnancy, and their effects on the microbiome of the placenta and the meconium in neonatal puppies. We further compare the microbiome knowledge gained in the last decade on human neonates and draw parallels with canine pregnancy and the neonatal microbiome.


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