Octavian Buda

Non-coding RNAs: The cancer genome dark matter that matters!

Abstract Protein-coding genes comprise only 3% of the human genome, while the genes that are transcribed into RNAs but do not code for proteins occupy majority of the genome. Once considered as biological darker matter, non-coding RNAs are now being recognized as critical regulators in cancer genome. Among the many types of non-coding RNAs, microRNAs approximately 20 nucleotides in length are best characterized and their mechanisms of action are well generalized. microRNA exerts oncogenic or tumor suppressor function by regulation of protein-coding genes via sequence complementarity. The expression of microRNA is aberrantly regulated in all cancer types, and both academia and biotech companies have been keenly pursuing the potential of microRNA as cancer biomarker for early detection, prognosis, and therapeutic response. The key involvement of microRNAs in cancer also prompted interest on exploration of therapeutic values of microRNAs as anticancer drugs and drug targets. MRX34, a liposome-formulated miRNA-34 mimic, developed by Mirna Therapeutics, becomes the first microRNA therapeutic entering clinical trial for the treatment of hepatocellular carcinoma, renal cell carcinoma, and melanoma. In this review, we presented a general overview of microRNAs in cancer biology, the potential of microRNAs as cancer biomarkers and therapeutic targets, and associated challenges.

Shake the Disease. Georges Marinesco, Paul Blocq and the Pathogenesis of Parkinsonism, 1893.

James Parkinson, in his “Essay on the Shaking Palsy” from 1817 described for the first time the disease that later on carried his name. Its anatomical substrate remained controversial for over 100 years. The first case that suggested the association between Parkinson’s disease and substantia nigra was published in 1893 Blocq and Marinesco, two scientists who worked at Salpêtrière. The article described a 38 years-old man, with tuberculosis, who was admitted to the Charcot’s neurological ward because he also showed signs of unilateral Parkinsonism. During the autopsy, the investigators found a tubercle that destroyed the right substantia nigra. As the patient had overactive reflexes on the left side and the symptomatology matched exactly the localization of the tumor, Blocq and Marinesco suggested the Parkinsonism to be more likely a complication of tuberculosis and not an incidental finding. In this article, we will discuss the contribution of these two authors to the elucidation of the pathology of Parkinson’s disease, and highlight how even a single case report may play an essential role in the development of knowledge in biomedical sciences.

Nuevas tecnologías en biomedicina: Opiniones de médicos jóvenes de Rumania

The purpose of this article is to summarize the way young medical professionals view these modern biomedical procedures and their moral acceptability. Materials and methods: A survey, filled in online, analyzing items in four main areas: genetic techniques, cloning, stem cell research, and assisted reproduction. Results: Most subjects agreed that the right to the genetic material should be a fundamental human right and that genetic engineering should be used if it could lead to the elimination os severe genetic diseases like cystic fibrosis and thalassemia. The least acceptance rate was obtained for techniques that would either change physical traits (like eye or hair color) or augment them. Most subjects agreed that the prenatal screening should be mandatory, and if the screening detects a severe congenital malformation the physician should recommend therapeutic abortion. Most subjects disagreed that cloning of any type, either therapeutic or reproductive, using human, animal, or vegetal genetic material. Most subjects agreed with the collection and storage of cord blood stem cells and the use of adult stem cells, and most of them disagreed with the creation of embryos specifically for obtaining stem cells. Conclusions: Even if the national legislation in this area is very scarce, the responses have usually identified the highly controversial techniques. If however the national legislation has elements similar to the items from the survey, they tended to take the respective items as morally acceptable without trying to analyze them critically.

NEW TECHNOLOGIES IN BIOMEDICINE. OPINIONS OF YOUNG ROMANIAN PHYSICIANS

The purpose of this article is to summarize the way young medical professionals view these modern biomedical procedures and their moral acceptability. Materials and methods: A survey, filled in online, analyzing items in four main areas: genetic techniques, cloning, stem cell research, and assisted reproduction. Results: Most subjects agreed that the right to the genetic material should be a fundamental human right and that genetic engineering should be used if it could lead to the elimination os severe genetic diseases like cystic fibrosis and thalassemia. The least acceptance rate was obtained for techniques that would either change physical traits (like eye or hair color) or augment them. Most subjects agreed that the prenatal screening should be mandatory, and if the screening detects a severe congenital malformation the physician should recommend therapeutic abortion. Most subjects disagreed that cloning of any type, either therapeutic or reproductive, using human, animal, or vegetal genetic material. Most subjects agreed with the collection and storage of cord blood stem cells and the use of adult stem cells, and most of them disagreed with the creation of embryos specifically for obtaining stem cells. Conclusions: Even if the national legislation in this area is very scarce, the responses have usually identified the highly controversial techniques. If however the national legislation has elements similar to the items from the survey, they tended to take the respective items as morally acceptable without trying to analyze them critically.

Novas tecnologias em biomedicina: Opiniões de jovens médicos romenos

The purpose of this article is to summarize the way young medical professionals view these modern biomedical procedures and their moral acceptability. Materials and methods: A survey, filled in online, analyzing items in four main areas: genetic techniques, cloning, stem cell research, and assisted reproduction. Results: Most subjects agreed that the right to the genetic material should be a fundamental human right and that genetic engineering should be used if it could lead to the elimination os severe genetic diseases like cystic fibrosis and thalassemia. The least acceptance rate was obtained for techniques that would either change physical traits (like eye or hair color) or augment them. Most subjects agreed that the prenatal screening should be mandatory, and if the screening detects a severe congenital malformation the physician should recommend therapeutic abortion. Most subjects disagreed that cloning of any type, either therapeutic or reproductive, using human, animal, or vegetal genetic material. Most subjects agreed with the collection and storage of cord blood stem cells and the use of adult stem cells, and most of them disagreed with the creation of embryos specifically for obtaining stem cells. Conclusions: Even if the national legislation in this area is very scarce, the responses have usually identified the highly controversial techniques. If however the national legislation has elements similar to the items from the survey, they tended to take the respective items as morally acceptable without trying to analyze them critically.