Adishesh M

Alnafakh R

Baird DM

Button L

DeCruze SB

Drury J

Hapangama D

Jones RE

Kamal A

Kirwan J

Saretzki G

Simon S

Telomeres are transcribed as long non-coding RNAs called TERRAs (Telomeric repeat 19 containing RNA) that participate in a variety of cellular regulatory functions. High telomerase 20 activity (TA) is associated with endometrial cancer (EC). This study aimed to examine the levels of 21 three TERRAs, transcribed at chromosomes 1q-2q-4q-10q-13q-22q, 16p, and 20q in healthy (n=23) 22 and pathological (n=24) human endometrium and to examine their association with cellular 23 proliferation, TA and telomere lengths. EC samples demonstrated significantly reduced levels of 24 TERRAs for Chromosome 16p (Ch-16p) (P&lt;0.002) and Chromosome 20q (Ch-20q) (P= 0.0006), when 25 compared with the postmenopausal samples. No significant correlation was found between TERRA 26 levels and TA but both Ch-16p and Ch-20q TERRA levels negatively correlated with the proliferative 27 marker Ki67 (r=-0.35, P=0.03 and r=-0.42, P=0.01 respectively). Evaluation of single telomere length 28 analysis (STELA) at XpYp telomeres demonstrated a significant shortening in EC samples when 29 compared with healthy tissues (P=0.002). We detected TERRAs in healthy human endometrium and 30 observed altered individual TERRA-specific levels in malignant endometrium. The negative 31 correlation of TERRAs with cellular proliferation along with their significant reduction in EC may 32 suggest a role for TERRAs in carcinogenesis and thus future research should explore TERRAs as 33 potential therapeutic targets in EC

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Human endometrial carcinogenesis is associated with significant reduction in Long non-coding RNA, TERRA

Human endometrial carcinogenesis is associated with significant reduction in Long non-coding RNA, TERRA

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