human
The task is to decide the Hallmarks of Cancer (HOC) taxonomy of the article based on its abstract. The input is an abstract text. There are 10 topics you will need to decide whether the article is related to. Topics: sustaining proliferative signaling, evading growth suppressors, resisting cell death, enabling replicative immortality, inducing angiogenesis, activating invasion and metastasis, genomic instability and mutation, tumor promoting inflammation, cellular energetics, avoiding immune destruction. The output should be topics from the above 10 topics, that are related to the input article. Please note one article can be related to multiple topics. Output format: provide a semicolon-separated list of relevant topics.
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    INPUT: We have isolated rabbit kidney proximal tubular epithelial cell lines . The selection was based on their ability to form confluent monolayers on porous supports and to maintain receptor-mediated signal transduction and ion transport , characteristic of the proximal tubule . The isolation method consisted of several steps : ( 1 ) superficial cortical proximal tubule segments were microdissected and cultured on a matrix-coated porous support until cells formed a confluent monolayer ; ( 2 ) primary cultures showing hormone-regulated ion transport typical for the proximal tubule were selected and co-cultured with irradiated fibroblasts ; and ( 3 ) the epithelial cells surviving after several passages were expanded and passaged on porous substrates . Most of the cell lines developed in this manner were obtained by co-culture with irradiated fibroblasts producing a recombinant retrovirus encoding SV40 large T antigen and G418 resistance . However , SV40 T antigen expression was not essential for immortalization , since neither T antigen nor G418 resistance was detected in the isolated cell lines and co-culture with non-producing 3T3 cells gave similar results . One cell line ( vEPT ) has been characterized in some detail with respect to morphological , biochemical , and ion transport properties . This line forms confluent monolayers with apical microvilli , tight junctions , and convolutions of the basolateral plasma membrane . Once confluent , monolayers maintain conductances of 25 to 32 mS/cm2 for several weeks in culture and possess phlorizin-sensitive short-circuit current ( Isc ) in glucose containing media , indicative of apical Na(+)-glucose co-transport. vEPT cells also retain receptor and signaling mechanisms for angiotensin II ( Ang II ) . Apical and basal Ang II and 5,6-epoxy-eicosatrienoic acid ( 5,6-EET ) modulate the Isc in a manner similar to primary cultures . The cell lines share with primary cultures expression of the cytokeratins K8 , K10/K11 , and K19 ( "nomenclature " [ 21] ) . They also retain several receptor and signal transduction mechanisms . For example , Ang II , arachidonate , bradykinin , 5,6-EET , parathyroid hormone ( residues 1 through 34 ) , and purine nucleotides increase cytosolic Ca2+ , PTH elevates cAMP levels , and Ang II enhances proximal tubule-specific arachidonic acid metabolism .
    OUTPUT:

agent
enabling replicative immortality
The task is to decide the Hallmarks of Cancer (HOC) taxonomy of the article based on its abstract. The input is an abstract text. There are 10 topics you will need to decide whether the article is related to. Topics: sustaining proliferative signaling, evading growth suppressors, resisting cell death, enabling replicative immortality, inducing angiogenesis, activating invasion and metastasis, genomic instability and mutation, tumor promoting inflammation, cellular energetics, avoiding immune destruction. The output should be topics from the above 10 topics, that are related to the input article. Please note one article can be related to multiple topics. Output format: provide a semicolon-separated list of relevant topics.
    ###
    INPUT: We have isolated rabbit kidney proximal tubular epithelial cell lines . The selection was based on their ability to form confluent monolayers on porous supports and to maintain receptor-mediated signal transduction and ion transport , characteristic of the proximal tubule . The isolation method consisted of several steps : ( 1 ) superficial cortical proximal tubule segments were microdissected and cultured on a matrix-coated porous support until cells formed a confluent monolayer ; ( 2 ) primary cultures showing hormone-regulated ion transport typical for the proximal tubule were selected and co-cultured with irradiated fibroblasts ; and ( 3 ) the epithelial cells surviving after several passages were expanded and passaged on porous substrates . Most of the cell lines developed in this manner were obtained by co-culture with irradiated fibroblasts producing a recombinant retrovirus encoding SV40 large T antigen and G418 resistance . However , SV40 T antigen expression was not essential for immortalization , since neither T antigen nor G418 resistance was detected in the isolated cell lines and co-culture with non-producing 3T3 cells gave similar results . One cell line ( vEPT ) has been characterized in some detail with respect to morphological , biochemical , and ion transport properties . This line forms confluent monolayers with apical microvilli , tight junctions , and convolutions of the basolateral plasma membrane . Once confluent , monolayers maintain conductances of 25 to 32 mS/cm2 for several weeks in culture and possess phlorizin-sensitive short-circuit current ( Isc ) in glucose containing media , indicative of apical Na(+)-glucose co-transport. vEPT cells also retain receptor and signaling mechanisms for angiotensin II ( Ang II ) . Apical and basal Ang II and 5,6-epoxy-eicosatrienoic acid ( 5,6-EET ) modulate the Isc in a manner similar to primary cultures . The cell lines share with primary cultures expression of the cytokeratins K8 , K10/K11 , and K19 ( "nomenclature " [ 21] ) . They also retain several receptor and signal transduction mechanisms . For example , Ang II , arachidonate , bradykinin , 5,6-EET , parathyroid hormone ( residues 1 through 34 ) , and purine nucleotides increase cytosolic Ca2+ , PTH elevates cAMP levels , and Ang II enhances proximal tubule-specific arachidonic acid metabolism .
    OUTPUT:
