Two unlinked recessive mutations (ks-1 and ks-2 ) have been induced in Paramecium tetraurelia stock 51. Wild-type survives and grows when up to 30 mm KCl is added to the medium, but the mutants cease to grow and die when added KCl reaches 20-25 m m. These K(+)-sensitives have been crossed to stocks containing the K(+)-resistant genes, fA (very resistant) and kA (moderately resistant). All four ...

Kaposi sarcoma (KS) is an endothelial malignancy caused by human herpes virus-8 (HHV-8) infection. The epidemic and iatrogenic forms of childhood KS result from a profound and acquired T cell deficiency. Recent studies have shown that classic KS of childhood can result from rare single-gene inborn errors of immunity, with mutations in WAS, IFNGR1, STIM1, and TNFRSF4. The pathogenesis of the end...

Periorbital vasculitis is a previously unreported complication of Kawasaki syndrome (KS). We describe an infant with severe KS refractory to initial management with salicylate and intravenous immunoglobulin (IVIG). Retreatment with IVIG and high-dose pulsed steroids was required for persistent fever and inflammatory manifestations. Despite aggressive medical therapy, a large left coronary arter...

We conducted a clinical trial of oral valganciclovir, a drug with in vitro activity against Kaposi sarcoma (KS)-associated herpesvirus (KSHV), in classic KS. Five human immunodeficiency virus-seronegative participants received valganciclovir for up to six 4-week cycles at doses used for cytomegalovirus infection. None of the study subjects showed an objective response; KS progressed in 4 subjec...

BACKGROUND The spectrum of Kaposi's sarcoma (KS) has been expanded to include pre-KS lesions. CASE PRESENTATION We report, for the first time, a case providing direct histological evidence of the development of early (in-situ) KS from mediastinal lymphatic vessels in the setting of chronic lymphedema in an HIV-positive patient. Spindle-shaped and endothelial cells in these early KS-appearing ...

Kaposi's sarcoma (KS) is a multicentric, malignant neoplastic vascular disease, mainly involving skin and mucosae, characterised by the proliferation of endothelial cells. The aetiology of KS still is unknown. Nonetheless, it has been reported that several epidemiological and environmental factors may play a role in its pathogenesis. Viral factors (i.e. human herpes virus 8, HHV-8) have also be...

Kaposi sarcoma (KS) is the most frequent AIDS-defining cancer worldwide. KS-associated herpesvirus (KSHV) is the etiological agent of KS, and the virus is also associated with two lymphoproliferative diseases. Both KS and KSHV-associated lymphomas, are cancers of unique molecular composition. They represent a challenge for cancer treatment and an opportunity to identify new mechanisms of transf...

Kaposi's sarcoma (KS) associated with AIDS (AIDS-KS) is the most prevalent neoplasia among patients with AIDS. Its incidence has decreased dramatically in recent years due to the widespread use of highly active antiretroviral therapy (HAART). Paradoxically, in relation to the introduction of HAART it may occur a worsening or development of AIDS-KS despite the improvement of the immune function....

Cell lines derived from Kaposi sarcoma lesions of patients with AIDS (AIDS-KS cells) produce several cytokines, including an endothelial cell growth factor, interleukin 1 beta, and basic fibroblast growth factor. Since exposure to human immunodeficiency virus increases interleukin 6 (IL-6) production in monocytes and endothelial cells produce IL-6, we examined IL-6 expression and response in AI...

BACKGROUND AND PURPOSE Kaposi's sarcoma (KS) is a spindle cell malignancy of endothelial cell origin. The tumor has been demonstrated to be associated with human herpesvirus 8 (HHV-8) or Kaposi's sarcoma-associated herpesvirus-like virus (KSHV). Previous studies have revealed the distribution of unique viral strains in different ethnic populations. Eastern Taiwan has an ethnically mixed populat...