You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["Outcome", "Participant", "Intervention"].

Please return the output as a JSON object of the format: {"Participant" : ["patients with COPD", ...], "Intervention" : ["Atenolol", ...], "Outcome" : ["blood pressure", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Effect of resistance exercise contraction mode and protein supplementation on members of the STARS signalling pathway . The striated muscle activator of Rho signalling ( STARS ) pathway is suggested to provide a link between external stress responses and transcriptional regulation in muscle . However , the sensitivity of STARS signalling to different mechanical stresses has not been investigated . In a comparative study , we examined the regulation of the STARS signalling pathway in response to unilateral resistance exercise performed as either eccentric ( ECC ) or concentric ( CONC ) contractions as well as prolonged training ; with and without whey protein supplementation . Skeletal muscle STARS , myocardian-related transcription factor-A ( MRTF-A ) and serum response factor ( SRF ) mRNA and protein , as well as muscle cross-sectional area and maximal voluntary contraction , were measured . A single-bout of exercise produced increases in STARS and SRF mRNA and decreases in MRTF-A mRNA with both ECC and CONC exercise , but with an enhanced response occurring following ECC exercise . A 31 % increase in STARS protein was observed exclusively after CONC exercise ( P < 0.001 ) , while pSRF protein levels increased similarly by 48 % with both CONC and ECC exercise ( P < 0.001 ) . Prolonged ECC and CONC training equally stimulated muscle hypertrophy and produced increases in MRTF-A protein of 125 % and 99 % , respectively ( P < 0.001 ) . No changes occurred for total SRF protein . There was no effect of whey protein supplementation . These results show that resistance exercise provides an acute stimulation of the STARS pathway that is contraction mode dependent . The responses to acute exercise were more pronounced than responses to accumulated training , suggesting that STARS signalling is primarily involved in the initial phase of exercise-induced muscle adaptations .
{"Intervention": ["acute exercise", "accumulated training", "resistance exercise", "exercise", "protein supplementation", "ECC", "resistance exercise contraction mode", "ECC exercise", "eccentric ( ECC ) or concentric ( CONC ) contractions", "CONC exercise", "whey protein supplementation", "prolonged training"], "Outcome": ["MRTF-A protein", "total SRF protein", "acute stimulation of the STARS pathway", "STARS", "whey protein supplementation .", "pSRF", "MRTF-A mRNA with both ECC and CONC exercise", "STARS protein", "SRF mRNA"], "Participant": []}