, Volume 68, Issue 4, pp 1301–1314 | Cite as

Impaired telomerase activity hinders proliferation and in vitro transformation of Penaeus monodon lymphoid cells

  • P. Jayesh
  • S. Vrinda
  • P. Priyaja
  • Rosamma Philip
  • I. S. Bright SinghEmail author
Original Research


Retaining terminal transferase activity of telomerase, the ribonucleoprotein enzyme which add telomeric repeats on chromosome end is thought to be required to prevent cellular ageing. Additionally, telomerase considered as a marker for cell proliferation and immortalization in eukaryotes. We examined telomerase activity in tissues and lymphoid cell culture of Penaeus monodon. Along with telomerase activity, telomere repeats and an attempt on identification of telomerase reverse transcriptase (PmTERT) were made. Telomeric repeat amplification protocol revealed that telomerase-dependent telomeric lengthening has been taking place in P. monodon and the adult tissues were retaining this capacity throughout their lifespan with the highest activity in ovary, testis and lymphoid organ. However, telomerase activity could not be detected in lymphoid cells in culture. The canonical telomeric repeats added by telomerase of lymphoid tissue extract were identified as TTAGG, but pentameric repeats GGTTA and AGGTT were also added by the telomerase. PmTERT protein sequence (partial) shared 100 % identity with the TERT sequence of Daphnia pulex, 27 % sequence identity with Purple sea urchin and 24–25 % with Zebra fish. Undetectable telomerase activity in lymphoid cell culture supports the hypothesis that the inadequate telomerase activity or gene expression may be a reason that prevents neoplastic transformation and spontaneous immortalization of the cells in vitro. Thus, it is envisaged that telomerase activation in lymphoid cells may surmount cellular ageing for in vitro transformation and cell line establishment.


Telomerase Telomere PmTERT gene Telomerase reverse transcriptase Penaeus monodon Lymphoid cell culture 



This research was supported by Department of Biotechnology, Government of India (BT/PR8050/AAQ/03/289/2006 and BT/PR5126/AAQ/3/591/2012). The first author thanks DBT for Fellowship.


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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • P. Jayesh
    • 1
    • 2
  • S. Vrinda
    • 1
  • P. Priyaja
    • 1
  • Rosamma Philip
    • 2
  • I. S. Bright Singh
    • 1
    Email author
  1. 1.National Centre for Aquatic Animal HealthCochin University of Science and TechnologyKochiIndia
  2. 2.Department of Marine Biology, Microbiology and BiochemistryCochin University of Science and TechnologyKochiIndia

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