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TT Viruses
Eleven years ago the circular DNA of a novel single-stranded virus has been cloned and partially characterized by Nishizawa and Okamoto and their colleagues. According to the initials of the patient from whom the isolate originated, the virus was named TT virus. This name has been subsequently changed by the International Committee on Taxonomy of Viruses (ICTV) into Torque teno virus, permitting the further use of the abbreviation TTV. Although initially suspected to play a role in non A –E hepatitis, subsequent studies failed to support this notion. Within a remarkably short period of time it became clear that TT viruses are widely spread globally, infect a large proportion of all human populations studied thus far and represent an extremely heterogeneous group of viruses, now labelled as Anelloviruses. TT virus-like infections have also been noted in various animal species. The classification of this virus group turns out to be difficult, their DNA contains between 2200 and 3800 nucleotides, related so-called TT-mini-viruses and a substantial proportion of intragenomic recombinants further complicate attempts to combine these viruses into a unifying phylogenetic concept.
TT Viruses
Eleven years ago the circular DNA of a novel single-stranded virus has been cloned and partially characterized by Nishizawa and Okamoto and their colleagues. According to the initials of the patient from whom the isolate originated, the virus was named TT virus. This name has been subsequently changed by the International Committee on Taxonomy of Viruses (ICTV) into Torque teno virus, permitting the further use of the abbreviation TTV. Although initially suspected to play a role in non A –E hepatitis, subsequent studies failed to support this notion. Within a remarkably short period of time it became clear that TT viruses are widely spread globally, infect a large proportion of all human populations studied thus far and represent an extremely heterogeneous group of viruses, now labelled as Anelloviruses. TT virus-like infections have also been noted in various animal species. The classification of this virus group turns out to be difficult, their DNA contains between 2200 and 3800 nucleotides, related so-called TT-mini-viruses and a substantial proportion of intragenomic recombinants further complicate attempts to combine these viruses into a unifying phylogenetic concept.
Advances in Cancer Research
Volume 68 of Advances in Cancer Research continues the tradition of publishing up-to-date reviews and "hot" topics in cancer research. This volume begins with a "Foundations in Cancer Research" article by Harald zur Hausen that reviews his years of research on the idea that cancer can be triggered by infection. The structure and function of the cytokine receptor superfamily and its association with leukemias are discussed in depth by James Ihle. Marcia Hall and Gordon Peters review the evidence indicating that genetic abnormalities hinder the function of certain cyclins and their inhibitors. The most widely studied protooncogene, c-myc, is reviewed by Marie Henriksson and Bernhard Lüscher; the chapter focuses on the function of c-myc as a transcription factor rather than on the effects of gene translocation and activation on malignancies. Ham Werner and Derek LeRoith present data on the role that insulin-like growth factors play on cell growth and regulation. In the final chapter, Olli-P. Kallioniemi and Tapio Visakorpi investigate the field of prostate cancer and, more importantly, the biological reason and natural history behind the growth of this cancer.
13TH WORLD CANCER CERVIX ERADICATION DAY
Cancer Cervix is the 4th most common cancer in women around the world. India accounts for approximately 25% of global prevalence. A study published in 2014 stated the crude incidence rate of cancer cervix is 20.2 per one lakh population in our country. In our state, Odisha, there has been a gross increase of incidence approximately by 4% between 2008 and 2011. Also, cancer cervix is the leading cause of cancer death in women in under developed countries. Pap smear has been the gold standard screening test for cervical cancer since its introduction in 1949. It has helped reducing the cervical cancer mortality rates roughly to half. New technology like immunocytochemistry assay for the simulta...
Nobel Lectures In Physiology Or Medicine (2006-2010)
Physiology or medicine was the third prize area Alfred Nobel mentioned in his will. Nobel had an active interest in medical research. He came into contact with Swedish physiologist Jöns Johansson through Karolinska Institute around 1890. Johansson worked for a brief period in Nobel's laboratory in Sevran, France during the same year. The Nobel Prize in Physiology or Medicine is awarded by the Nobel Assembly at Karolinska Institute. This volume is a collection of the Nobel lectures delivered by the Nobel Laureates, together with their biographies and the presentation speeches for the period 2006-2010.List of Laureates and their award citations:(2006) Andrew Z Fire and Craig C Mello — for t...
Human Papillomavirus (HPV)-Associated Oropharyngeal Cancer
Head and neck squamous cell carcinoma (HNSCC), the sixth most prevalent cancer worldwide, remains a very difficult disease to treat and cure despite intensive investigation into molecular etiologies and tumor progression pathways. Due to public health efforts encouraging smoking cessation, the overall incidence of HNSCC has decreased in recent years in many countries. In contrast, the incidence of oropharyngeal squamous cell carcinoma (OPSCC) has increased significantly, and this subtype of HNSCC is commonly associated with human papillomavirus (HPV) infection. Moreover, individuals with HPV-positive OPSCC are generally younger and are frequently non-smokers, suggesting that HPV-associated O...
