first_imgBy Dialogo December 20, 2011 Approximately 450 members of a Colombian gang working for drug traffickers, made up largely of former paramilitaries, are expected to turn themselves in to the authorities before the end of 2011, Colombian news media said. The daily El Tiempo, citing official sources, reported that the surrender, coordinated by the Public Prosecutor’s Office, is expected to take place before the end of the year, and it specified that the Colombian Catholic Church has also played a mediating role in this process. “Everything is all ready for around 450 members of the Anti-subversive Popular Revolutionary Army of Colombia (Erpac) to surrender to law enforcement,” the daily said, attributing its information to high-ranking officials. For its part, Radio Caracol indicated that it had confirmed with “government sources,” which it did not reveal, that the militants are expected to turn themselves in before the end of 2011. In statements to Semana magazine in November, the gang’s leader, Eberto López Montero, alias ‘Caracho,’ had already announced his intention to turn himself in with several hundred men. The former militants are expected to surrender to local law enforcement in a ceremony organized in Meta and Guaviare departments, where it is even expected that 60 gang leaders will turn themselves in. “Eberto López Montero, alias ‘Caracho,’ and Germán Ramírez Devia, ‘Vacafiada,’ are at the head of the group, the two outlaws who assumed command of the group following the death of the previous leader and founder ‘Cuchillo’ [‘Knife’] and who initiated contact with the authorities several months ago, through their lawyers,” El Tiempo specified. In December 2010, Colombian authorities killed “Cuchillo,” for whom the United States was offering a reward of 2.5 million dollars. This would be the first surrender of this magnitude since the large demobilizations of paramilitary militias produced by the negotiations between Álvaro Uribe’s administration (2002-2010) and the extreme right-wing United Self-Defense Forces of Colombia (AUC), between 2003 and 2006. Erpac is characterized by the authorities as a gang made up largely of former paramilitaries and drug traffickers and represents the greatest risk to public order, according to the Colombian police.last_img read more

first_imgThe modified common cold viruses behind high-profile COVID-19 vaccine candidates from China’s CanSino Biologics and Russia’s Gamaleya Institute have been studied for decades, but are still not widely used.The following are some details of their development, how they work and past and potential future uses: When were these viruses first used in medical research? Vectors are materials used as mechanisms to carry genetic information into human cells. Modified viruses that cannot replicate on their own and so will not cause infection can be used as vectors to carry genes from the target virus into human cells to induce an immune response against that virus.Ad5 vectors were tested in early gene therapy, which aims to install a missing gene or replace a mutated or damaged one. They were largely abandoned after an 18-year-old died in 1999 from an immune system overreaction after receiving a large dose during a gene therapy trial.Some researchers believe the strong immune response that caused problems with gene therapy makes these vectors well suited to vaccines, where much lower doses are used and a protective immune response is the objective.Have ad5 vectors been successful in the past?At McMaster University in Canada, Graham and collaborators developed a variety of Ad5 vectors, including for a rabies vaccine used on wild raccoons in the province of Ontario.He and other researchers began developing an Ad5-based vaccine against Severe Acute Respiratory Syndrome (SARS) in 2003 and published preclinical data. It was set aside when that pandemic ended.In 2011, CanSino licensed an experimental tuberculosis vaccine based on Ad5 from McMaster researchers.The Chinese company’s focus later shifted to an Ad5-based Ebola vaccine at the request of the Chinese military, according to Dr. Thomas Evans, current chief scientific officer at Vaccitech, who was involved with the tuberculosis project. The Ebola vaccine was approved for military use in 2017.Russia’s Gamaleya Research Institute, which developed Russia’s coronavirus vaccine, also used the Ad5 platform to develop an Ebola vaccine, which they said has been administered to about 2,100 people.What else is under development using ad5 vectors?In addition to the Ad5-based COVID-19 vaccines, an inhaled version of the experimental tuberculosis vaccine is still under development at McMaster, Dr. Zhou Xing told Reuters. His team is also in the early stages of developing an inhaled COVID-19 vaccine, testing Ad5 and another vector based on a chimpanzee adenovirus. Topics :center_img The modified adenovirus type 5 (Ad5) viruses used in these vaccines grow in a human kidney cell line called HEK293 that was created by Canadian researcher Dr. Frank Graham at a Dutch lab in the 1970s and first used to make viral vectors in the 1980s.Graham planned to use HEK293 cells to study mechanisms underlying cancer, and distributed them to researchers all over the world.”The cells became tremendously widespread and popular” among researchers, said Graham, now retired in Italy.What are vectors used in vaccines and how do they work?last_img read more