Fluctuations of Histone Chemical Modifications in Breast, Prostate, and Colorectal Cancer: An Implication of Phytochemicals as Defenders of Chromatin Equilibrium.

Natural substances of plant origin exert health beneficiary efficacy due to the content of various phytochemicals. Significant anticancer abilities of natural compounds are mediated via various processes such as regulation of a cell's epigenome. The potential antineoplastic activity of plant natural substances mediated by their action on posttranslational histone modifications (PHMs) is currently a highly evaluated area of cancer research. PHMs play an important role in maintaining chromatin structure and regulating gene expression. Aberrations in PHMs are directly linked to the process of carcinogenesis in cancer such as breast (BC), prostate (PC), and colorectal (CRC) cancer, common malignant diseases in terms of incidence and mortality among both men and women. This review summarizes the effects of plant phytochemicals (isolated or mixtures) on cancer-associated PHMs (mainly modulation of acetylation and methylation) resulting in alterations of chromatin structure that are related to the regulation of transcription activity of specific oncogenes, which are crucial in the development of BC, PC, and CRC. Significant effectiveness of natural compounds in the modulation of aberrant PHMs were confirmed by a number of in vitro or in vivo studies in preclinical cancer research. However, evidence concerning PHMs-modulating abilities of plant-based natural substances in clinical trials is insufficient.

Malaria in hyperendemic region of Uganda has seasonal variations and is associated with low mortality.

OBJECTIVE: Majority of malaria cases in hyper-endemic areas have seasonal variations. The aim of this short research note is to refer and assess seasonal variability and mortality of malaria in Ngogwe in southeast Uganda in 2011/2012 season. METHODS: We analyzed clinical records of patients admitted to Buikwe-Ngogwe Hospital in the period from July 1, 2011 to August 25, 2012 to assess seasonality of malaria. RESULTS: Altogether, 23,675 patients were admitted to Buikwe-Ngogwe Hospital due to fever illness and 14,940 malaria-positive samples were obtained (63.1%) from these patients. We have observed significantly higher number of malaria cases in December compared to period of June - November (p<0.01). Mortality rate was only 0.48%. CONCLUSION: Interestingly, we have observed seasonal variability in malaria occurrence in Ngogwe, Southeast Uganda, which is, not correlating with rainy season but with movement of population to the areas closer to Lake Victoria. However, despite of high prevalence, mortality of this disease remained low. The reasons for low mortality are probably a good access to health care facility and adaptation of artemisinin-based combinational therapy for documented malaria.

Gene polymorphisms in bladder cancer.

In Europe, cancer of the bladder is the fourth most common cancer among men, accounting for 7% of total cancers. In the USA, bladder cancer is the fifth most common cancer in men and seventh in women. This disease is three times more common in men than in women. Several risk factors, such as cigarette smoking and occupational chemical exposure, contribute to bladder cancer development. The balance between activation and detoxification of carcinogens affects the amount of DNA damage that accumulates in cells. The entire process leading to DNA damage and subsequent repair of the damage involves a host of enzymes, many of which are polymorphic. Polymorphisms in metabolic enzyme genes and repair genes may cause alterations in protein product functions that can finally lead to genomic instability and carcinogenesis. In this article, we review the polymorphisms in a number of genes that have been found to be the modulators of bladder cancer risk. Improved understanding of the molecular biology of urothelial malignancies is helping to more clearly define the role of new prognostic indices and multidisciplinary treatment for this disease.