Werissaw Haileselassie, Tefera Mulugeta, Wondemagegnhu Tigeneh, Mirgissa Kaba, Wajana Lako Labisso. J Cancer Prev 2019;24:33-42. https://doi.org/10.15430/JCP.2019.24.1.33

Alterations in protein glycosylation patterns have potentially been targeted for biomarker discovery in a wide range of diseases including cancer. Although there have been improvements in patient diagnosis and survival for breast cancer (BC), there is no clinically validated serum biomarker for its early diagnosis. Here, we profiled whole serum and purified Immunoglobulin G (IgG) fraction N-glycome towards identification of non-invasive glycan markers of BC. We employed a comprehensive glycomics approach by integrating glycoblotting-based glycan purification with MALDI-TOF/MS based quantitative analysis. Sera of BC patients belonging to stages I-IV and normal controls (NC) were collected from Ethiopian women during 2015–2016. IgG was purified by affinity chromatography using protein G spin plate and further subjected to glycoblotting for glycan release. Mass spectral data were further processed and evaluated rigorously, using various bioinformatics and statistical tools. Out of 35 N-glycans that were significantly up-regulated in the sera of all BC patients compared to the NC, 17 complex type N-glycans showed profound expression abundance and diagnostic potential (AUC = 0.8–1) for the early stage (I and II) BC patients. Most of these glycans were core-fucosylated, multiply branched and sialylated structures, whose abundance has been strongly associated with greater invasive and metastatic potential of cancer. N-glycans quantified form IgG confirmed their abundance in BC patients, of which two core-fucosylated and agalactosylated glycans (m/z 1591, 1794) could specifically distinguish (AUC = 0.944 and 0.921, p ≤ 0.001) stage II patients from NC. Abundance of such structural features in IgG is associated with a decrease in its immunosuppressive potential towards tumor cells, which in part may correlate with the aggressive nature of BC commonly noticed in black population. Our comprehensive study has addressed for the first time both whole serum and IgG N-glycosylation signatures of native black women suffering from BC and revealed novel glyco-biomarkers with marked overexpression and distinguishing ability at early stage patients. Further studies on direct identification of the intact glycoproteins using a glycoprteomics approach will provide a deeper understanding of specific biomarkers towards their clinical utility.

Repetitive excessive alcohol intoxication leads to neuronal damage and brain shrinkage. We examined cytoskeletal protein expression in human post-mortem tissue from Brodmann’s area 9 of the prefrontal cortex (PFC). Brain samples from 44 individuals were divided into equal groups of 11 control, 11 alcoholic, 11 non-alcoholic suicides, and 11 suicide alcoholics matched for age, sex, and post-mortem delay. Tissue from alcoholic cohorts displayed significantly reduced expression of α- and β-tubulins, and increased levels of acetylated α-tubulin. Protein levels of histone deacetylase-6 (HDAC6), and the microtubule-associated proteins MAP-2 and MAP-tau were reduced in alcoholic cohorts, although for MAPs this was not significant. Tubulin gene expressions increased in alcoholic cohorts but not significantly. Brains from rats administered alcohol for 4 weeks also displayed significantly reduced tubulin protein levels and increased α-tubulin acetylation. PFC tissue from control subjects had reduced tubulin protein expression that was most notable from the sixth to the eighth decade of life. Collectively, loss of neuronal tubulin proteins are a hallmark of both chronic alcohol consumption and natural brain ageing. The reduction of cytosolic tubulin proteins could contribute to the brain volumetric losses reported for alcoholic patients and the elderly.

Background: The general population’s lack of awareness, limited knowledge, myths and misconceptions about breast and cervical cancers (CCs) is considered as a serious public health problem. Objective: This study was intended to assess the status of awareness and beliefs of people about cancer and breast and CCs in particular. Methods: A descriptive community-based cross-sectional survey was conducted on 345 study participants in Southern Ethiopia. A pretested, structured questionnaire that contained demographics and questions on the variables of exposure to biological and chemical carcinogenic agents, lifestyle and personal behavior was administered. Frequency distribution and proportions were used to describe the study population in relation to major variables. Results: The mean age of study participants was 25.19 (Range 15– 58). More than a third of the study participants heard about cancer from Mass Media followed by schools (28.5%) and treating physicians (6.7%). The proportion of study participants that knew about the association between smoking, alcohol intake and cancer development was 38.6% and 51.5%, respectively. Only 48% and 24.2% of the study participants heard about breast and CCs, respectively. The fact that 69.4% of the study participants had limited knowledge about the mode of transmission of the causative agents of CCs indicates that the study groups are at risk of acquiring the agent. Additionally, only 4.7% of the study participants were screened for CC and have poor breast self-examination experiences, indicating poor awareness and knowledge about the importance of screening programs. Conclusion: Comprehensive awareness and knowledge about cancer in general and breast and CCs in particular is lacking in southern Ethiopia. Early sexual debut, limited knowledge about the diseases and unfavorable lifestyle are the risk factors to be addressed in public health education.

Dessiet Oma, Maria Teklemariam, Daniel Seifu, Zelalem Desalegn, Endale Anberbir, Tamrat Abebe, Solomon Mequannent, Solomon Tebeje, Wajana Lako Labisso. J Cancer Prev 2023;28:64-74. https://doi.org/10.15430/JCP.2023.28.2.64

Wajana Lako LABISSO. Korean J Clin Lab Sci. 2023;55:121-31. https://doi.org/10.15324/kjcls.2023.55.3.121