Drug Resistance in Bacteria: History, Genetics and Biochemistry

1993 ◽  
Vol 21 (1) ◽  
pp. 1-14 ◽  
Author(s):  
S Mitsuhashi

The significance of the discovery of prontosil in 1932 as the initiating step in the development of the modern era of antimicrobial chemotherapy is reviewed. The history of the discovery and the development of chemotherapeutic agents, from penicillin in 1929 to present-day antibiotics, are summarized. The various mechanisms by which bacteria are able to overcome the protective effects of these therapeutic agents (from the sulphonamides to the new fluoroquinolones) and develop resistance to them are discussed in detail. Attempts to elucidate the mechanisms by which resistance to chemotherapeutic agents develops are vital to the future of antimicrobial chemotherapy.

2019 ◽  
Vol 18 (30) ◽  
pp. 2544-2554 ◽  
Author(s):  
Sumit Biswas

Since their discovery in the 1990’s, the study of a class of non-coding, single-stranded RNAs, christened the microRNAs has opened up new vistas in the field of cancer biology. MicroRNAs bind to their target mRNAs to act as either oncogenes or tumour suppressors. With the near-complete elucidation of the biogenesis pathway, and the advent of rapid sequencing technologies, microRNAs have slowly cemented their place as essential biomarkers for delineating the progression, metastasis, relapse or drug resistance of cancer. Being crucial players in the cancer pathway, there has been considerable urgency in designing molecules - both at the nucleotide and non-nucleotide level to counter the effects of their binding. A number of different approaches have yielded quite a body of compounds which have been found to be effective in the treatment of various tumours across many different organs. In this study, the focus is on the review of the timeline of discovery and characterization of microRNAs, underlining their importance in different cancers, shedding light on the discovery of anti-microRNA compounds and illustrating their uses in deriving new strategies to combat cancer.


2021 ◽  
Vol 9 ◽  
pp. 205031212110670
Author(s):  
Zemene Demelash Kifle ◽  
Meklit Tadele ◽  
Eyerusalem Alemu ◽  
Tadele Gedamu ◽  
Akeberegn Gorems Ayele

Despite recent advances in cancer diagnosis, prevention, detection, as well as management, the disease is expected to be the top cause of death globally. The chemotherapy approach for cancer has become more advanced in its design, yet no medication can cure enough against all types of cancer and its stage. Thus, this review aimed to summarize a recent development of new therapeutic agents and novel drug targets for the treatment of cancer. Several obstacles stand in the way of effective cancer treatment and drug development, including inaccessibility of tumor site by appropriate drug concentration, debilitating untoward effects caused by non-selective tissue distribution of chemotherapeutic agents, and occurrence of drug resistance, which leads to cross-resistance to a variety of drugs. Resistance to treatment with anticancer drugs results from multiple factors and the most common reason for acquiring drug resistance is marking and expelling drugs that prevent cancer cells to be targeted by chemotherapeutic agents. Moreover, insensitivity to drug-induced apoptosis, alteration, and mutation of drug target and interference/change of DNA replication are other main causes of treatment failure.


2001 ◽  
Vol 6 (3) ◽  
pp. 172-176 ◽  
Author(s):  
Lawrence A. Pervin

David Magnusson has been the most articulate spokesperson for a holistic, systems approach to personality. This paper considers three concepts relevant to a dynamic systems approach to personality: dynamics, systems, and levels. Some of the history of a dynamic view is traced, leading to an emphasis on the need for stressing the interplay among goals. Concepts such as multidetermination, equipotentiality, and equifinality are shown to be important aspects of a systems approach. Finally, attention is drawn to the question of levels of description, analysis, and explanation in a theory of personality. The importance of the issue is emphasized in relation to recent advances in our understanding of biological processes. Integrating such advances into a theory of personality while avoiding the danger of reductionism is a challenge for the future.


2019 ◽  
Vol 50 (1) ◽  
pp. 1-6
Author(s):  
Katja Corcoran ◽  
Michael Häfner ◽  
Mathias Kauff ◽  
Stefan Stürmer

Abstract. In this article, we reflect on 50 years of the journal Social Psychology. We interviewed colleagues who have witnessed the history of the journal. Based on these interviews, we identified three crucial periods in Social Psychology’s history, that are (a) the early development and further professionalization of the journal, (b) the reunification of East and West Germany, and (c) the internationalization of the journal and its transformation from the Zeitschrift für Sozialpsychologie to Social Psychology. We end our reflection with a discussion of changes that occurred during these periods and their implication for the future of our field.


2016 ◽  
Vol 19 (3) ◽  
pp. 229-247 ◽  
Author(s):  
Hugo Klappenbach ◽  
Ana Maria Jacó-Vilela

2007 ◽  
pp. 87-103
Author(s):  
R. Nureev

The article is devoted to the history of reception and interpretation of the ideas of Marx and Engels. The author considers the reasons for divergence between Marxist and neoclassical economic theories. He also analyzes the ways of vulgarization of Marx’s theory and the making of Marxist voluntarism. It is shown that the works of Marx and Engels had a certain potential for their over-simplified interpretations. The article also considers academic ("Western") Marxism and evaluates the prospects of Marxist theory in the future.


2017 ◽  
pp. 5-21 ◽  
Author(s):  
E. Yasin

The article is devoted to major events in the history of the post-Soviet economy, their influence on forming and development of modern Russia. The author considers stages of restructuring, market reforms, transformational crisis, and recovery growth (1999-2011), as well as a current period which started in2011 and is experiencing serious problems. The present situation is analyzed, four possible scenarios are put forward for Russia: “inertia”, “mobilization”, “decisive leap”, “gradual democratic development”. More than 30 experts were questioned in the process of working out the scenarios.


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