Investigators from the University of Ferrara, Italy have found evidence suggesting that high levels of U94 in ciHHV6 may predispose to the formation of marker chromosomes. A patient with diffuse large B-cell lymphoma positive for inherited chromosomally integrated HHV-6A and HHV-6A was also found in a marker chromosome, an abnormal piece of chromosome that is seen in some leukemia and lymphomas.
Investigators at Yale University warn that hypersensitivity-associated HHV-6 lymphadenopathy can have the same presentation as lymphoma.
Biopsies from patients with 5 types of lymphoproliferative disorders of the ocular adnexa, were found to contain HHV-6 DNA in 9 of 70 (12.9%) samples. While an overall detection rate of 12.9% is significant, HHV-6 was even more prevalent among those with benign lymphoproliferative disorders; HHV-6 was found in 22.7% of those with IgG4-related ophthalmic disease and 28.6% of those with orbital reactive lymphoid hyperplasia.
A group from the National Institute of Neurological Disorders and Stroke, NIH, has reported finding Epstein-Barr Virus (EBV) and HHV-6 but no cytomegalovirus (CMV) in astrocytomas, a brain tumor comprising approximately one quarter of all gliomas diagnosed. The group used digital droplet PCR (ddPCR), a technique that is highly precise but less sensitive than nested PCR and immunohistochemistry, techniques that have been used in previous studies.
A recent study from investigators at Chongqing University in China explored the involvement of three viruses in the progression of pituitary adenomas (PA). The authors suggest that the HPV-16 and HHV-6 viruses activate the TLR3/ NF-kB signaling pathway which in turn contributes to the progression and proliferation of invasive pituitary adenomas.
Since the discovery of chromosomally integrated HHV-6 (ciHHV-6), investigators have wondered about the potential consequences of having chromosome integrated HHV-6 in the genome.
Scottish study finds inheritance of ciHHV-6 does not increase the risk of developing cHL
A group from Finland’s Helsinki University Hospital has published preliminary evidence to suggest HHV-6B may be involved in the development of adenomatous gastrointestinal polyps
A research team from Riga Stradins University in Latvia has reported that the activation of HHV-6B and HHV-7 in patients with gastrointestinal cancer may lead to a marked decrease in lymphocytes and worsening of immunosuppression.
Investigators from Nanjing Medical University have found HHV-6 latent infection in glioma tissues, and have isolated a strain of HHV-6A from the glioma cyst.
A thorough investigation of the association between HHV-6 and Hodgkin’s lymphoma finds the presence of HHV-6 in a majority of nodular sclerosis cases of HL.