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Clinical Trial Summary

Aerobic exercise has been shown to trigger a variety of body responses which then trigger physiological adaptations. One of the physiological adaptations that occur is an increase in mitochondrial biogenesis. Mitochondria are organelles in cells that play a role in providing energy. An increase in the number of mitochondria will increase the supply of energy for muscle cell contraction, so that muscles do not get tired easily. Mitochondrial biogenesis is known to be regulated by Peroxisome proliferator-activated receptor gamma co-activator-1 alpha (PGC-1α), by inducing transcription of genes encoded by the nucleus and mitochondria. Peroxisome proliferator-activated receptor gamma co-activator-1 alpha is a protein which encoded by the PPARGC1A gene. PPARGC1A gene expression itself can be influenced by microRNA, a short non-coding RNA that can regulate gene expression by suppressing or degrading the target gene. In vitro studies show that PPARGC1A gene is a direct gene target of microRNA (miR)-23a. In human studies, aerobic exercise has been shown to reduce miR-23a levels in human muscles immediately after exercise. Another study found an increase in muscle PGC-1 alpha levels after exercise. In addition to being detectable in muscle, both miR-23a and PGC-1 alpha can be measured in blood plasma. However, whether exercise can reduce miR-23a levels while increasing PGC-1 alpha levels in circulation, still needs further research. Therefore, this study aims to examine whether aerobic exercise will reduce miR-23a levels and PGC-1 alpha levels in plasma. In addition, this study will also compare whether exercise intensity affects the expression of miR-23a and PGC-1 alpha. In this study, measurements will be made on blood plasma to reduce the level of invasiveness. Subjects will be asked to come to the laboratory three times. The first meeting consisted of an examination, while in the second and third meetings the subjects would be asked to run at a moderate or high intensity. Blood sampling will be done before and after exercise.


Clinical Trial Description

This study is a randomized cross-over trial with a pre and post intervention measurement. In general, each subject will be asked to run with moderate and vigorous intensity in a random order. Healthy males aged 18-25 were recruited through announcements on social media. Subjects who are willing to join are asked to fill out a form via google forms. Subjects who meet the inclusion and exclusion criteria will be asked to come to the laboratory. At the first meeting, participants will be examined to ensure the subject meets the criteria. The examinations conducted including measurement of body weight, body height, blood pressure, lung function, and electrocardiography. Body weight will be measured using a digital weight scale, while body height will be measured three times using a stadiometer. For measuring the a blood pressure, the subject was asked to lie down for at least 5 minutes. Blood pressure will be measured three times on the right arm using the Omron digital sphygmomanometer. Lung function examination including forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1) and maximal voluntary ventilation (MVV) will be measured using a spirometer. Following the standard procedure from American Thoracic Society/ European Respiratory Society regarding spirometry examination, measurements will be performed in an upright sitting position. Measurement of FVC and FEV1 will be performed at least three times, while MVV will be performed at least twice to obtain reliable and acceptable results. Only healthy subject will be included in the study. At least 48 hours to 14 days after the first meeting, subjects will be asked to come to the second and third meetings to do moderate or high intensity exercise in randomized order. Before and after exercise, 3 ml of blood will be drawn from the cubital vein and put in an Ethylenediamine tetra acetic acid (EDTA) tube to collect the plasma. The plasma will then be centrifuged to separate the plasma from the blood cells. Plasma is stored in the freezer -80 degrees celsius until it will be used. The microRNA levels before and after exercise will be measured using real time polymerase chain reaction (qPCR). In general, RNA extraction will be conduct using the plasma extraction kit, following by complement DNA synthesis and qPCR. Normalization will be conduct by adding 3.5 micro liters of cel-miR-39 spike in control to each sample. Quantification of the microRNA level will be expressed as 2-[(CT microRNA)-(CT cel-miR-39)]. Normality test will be performed using Shapiro-Wilk test. If the data is normally distributed, the statistical test of the measurement results before and after exercise at both intensities will be analyzed using independent t-test. Meanwhile, if the data is not normally distributed, statistical analysis will be done using Mann Whitney test. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT04985006
Study type Interventional
Source Gadjah Mada University
Contact
Status Active, not recruiting
Phase N/A
Start date October 1, 2020
Completion date February 1, 2022

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