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LIFE09200604007 Tabish - Homi Bhabha National Institute

LIFE09200604007 Tabish - Homi Bhabha National Institute

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Results<br />

Objective 1<br />

To generate EBV LCLs from peripheral blood lymphocytes (PBLs) isolated from<br />

MPN patients and healthy controls - an established, in vitro model for genetic studies<br />

Long term genotype-phenotype correlation studies necessitate the availability<br />

of patient DNA sample and a continuous source of patient derived cells to avoid<br />

repeated blood sampling for multiple phenotypic assays. A major drawback for such<br />

studies is the lack of representative human cell lines providing a continuous source of<br />

basic biomolecules and a system to carry out various experimental investigations. This<br />

can be overcome to some extent by establishing LCLs by infecting peripheral blood<br />

lymphocytes with EBV which is known to immortalize human resting B cells in vitro<br />

giving rise to actively proliferating B-lymphoblastoid cell lines. Therefore blood<br />

samples were collected from patients with multiple primary cancers (MPN) of upper<br />

aero digestive tract (UADT) and healthy controls, to develop lymphoblastoid cell lines<br />

and isolate genomic DNA.<br />

4.1.1 Accrual and demographic characterization of study samples<br />

UADT MPN patients were accrued from the Cancer Genetics Clinic in Tata<br />

Memorial Hospital (TMH) where patients with familial history of cancers, rare genetic<br />

disorders and multiple primary cancers frequently visit for counselling. For this study<br />

blood sample from patients with at least one cancer in UADT were collected following<br />

Hong‟s criteria described in material and methods section-3.1. A total of 24 patients<br />

were taken for the study and preliminary analysis showed that majority of them had<br />

tobacco habits (n=20). The incidence of UADT MPN was almost equal in both the<br />

sexes with a male to female ratio of 6:4 in the study subjects with median age 53 years<br />

(age range 32-75 years). Tobacco habit varied between individuals in terms of type and<br />

amount consumed. Habit included smoking, tobacco chewing, tobacco with pan (betel<br />

quid) and areca nut chewing. Four out of 20 patients had a habit of alcohol<br />

consumption along with tobacco habit (Table 5, Fig. 6).<br />

84

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