Link to the paper: https://www.mdpi.com/2075-1729/12/11/1871#

The paper discusses a method using KSC Fixation Tubes (KFTs) to carry and fix biology during suborbital space flights, allowing for human-tended research on short-term gravitational effects in biological systems.

The KFTs are activated at different stages of the flight to fix the plants, and RNA-seq analysis shows that plants behave consistently in KFTs compared to petri-plates.

The enclosed environment of the KFTs, required for flight in human spacecraft, leads to reproducible transcriptomic alterations in plants over time.

The study also suggests that transcriptomic responses to suborbital spaceflight can be examined using this approach, as demonstrated by the responses to clinorotation during the simulated flight.

Contribution of this paper

The paper contributes by discussing a method using KSC Fixation Tubes (KFTs) to carry and fix biology during suborbital space flights, allowing for human-tended research on short-term gravitational effects in biological systems.

It demonstrates that plants behave consistently in KFTs compared to petri-plates, and RNA-seq analysis shows reproducible transcriptomic alterations over time in the KFTs.

The study also suggests that this approach can be used to examine transcriptomic responses to suborbital spaceflight, as evidenced by the responses to clinorotation during the simulated flight.

The paper also highlights the potential of human suborbital spaceflight as a complementary opportunity for researchers to conduct human-tended microgravity-related experiments, which can better recapitulate a laboratory bench experiment than automated locker payloads.

The practical implications of this paper are:

The practical implications of this paper are that it presents a method using KSC Fixation Tubes (KFTs) to carry and fix biology during suborbital space flights, enabling human-tended research on short-term gravitational effects in biological systems.

This method allows for hands-on plant molecular biology experiments in the suborbital environment, expanding the platforms from which space-related experiments can be conducted.

The use of KFTs as a vessel to house samples in space is a novel approach, and the data suggests that KFTs can be readily adapted for this purpose.

The enclosed environment of the KFTs provides a safely contained space for the biology, allowing for consistent plant health for several hours, providing ample time for human-tended experiments during the suborbital flight.

The study also demonstrates that plants within KFTs exhibit robust changes in gene expression during simulated microgravity, indicating the potential for capturing transcriptomic responses to the high g and microgravity portions of a suborbital flight.

Overall, this paper opens up new possibilities for conducting hands-on research in suborbital space, contributing to the advancement of science and technology for future space exploration.

The methods used in this paper include:

Utilizing KSC Fixation Tubes (KFTs) to carry biology to suborbital space and fix that biology at certain stages of flight.

Inserting plants on support media into the sample side of KFTs preloaded with RNAlater in the fixation chamber.

Activating the KFTs at various stages of a simulated flight to fix the plants.

Conducting RNA-seq analysis on tissue samples housed in KFTs to compare plant behavior in KFTs to petri-plates.

Growing plants on wire mesh coupons suspended into growth media within square Petri plates before placing them into KFTs.

Simulating a suborbital flight profile by leaving the KFTs undisturbed in a vertical orientation for a specific time period.

Actuating the KFTs at different time points to assess plant transcriptomic responses to the flight profile.

Harvesting plant tissues at each time point and conducting RNA-seq analysis to analyze gene expression patterns.

Data used in the study

The data used in this paper includes RNA-seq analysis conducted on tissue samples housed in KSC Fixation Tubes (KFTs) to compare plant behavior in KFTs to petri-plates.

The paper also mentions previous suborbital flight experiments using plants grown on a gel matrix, which showed that the plants adhered well to the gel matrix without sustaining any damages.

In a time-course experiment modeling a suborbital flight profile, root tissues and leaf tissues harvested from the KFTs at different time points were compared to control samples to analyze gene expression patterns.

The study also deposited Illumina Sequencing data to the Gene Expression Omnibus repository under the National Center for Biotechnology Information database, with the accession number GSE214377.

Overall, the data used in this paper includes gene expression profiles of plants in KFTs at different stages of a simulated flight, as well as comparisons to control samples and previous experiments.

The results of this paper are:

The paper presents the utilization of KSC Fixation Tubes (KFTs) for human-tended plant biology experiments in suborbital space flights, eliminating the need for complex automation.

The KFTs were used to carry biology to space and fix the plants at different stages of a simulated flight.

RNA-seq analysis conducted on tissue samples housed in KFTs showed consistent plant behavior compared to petri-plates, with roots adjusting to hypoxia and leaves adjusting to changes in photosynthesis.

The study suggests that transcriptomic responses to suborbital spaceflight can be examined using this approach, as plants exhibited expected reproducible transcriptomic alterations over time in the KFTs.

The data also indicate that KFTs can be adapted for carrying biological samples to space in a safely contained fashion, providing a tractable initialization of hands-on research in suborbital space.

The study highlights the potential for capturing transcriptomic responses to high g and microgravity portions of a suborbital flight using KFTs.

The paper also discusses best practices for experiment setup and conducting RNA-seq analysis to reliably report on the transcriptome of plant samples during a suborbital flight.

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