Future

Our study enables us to collect specific substances using DNA strands like a spider. This time, the “enemies”(targets) were DNA hydrogels but in the future we can achieve the following by divising the system so that we can collect other substances as well.

1. Functions as an immune in vivo

We got the idea of the "DNA spider" from the Phagocytic cells in the body of organisms. The DNA targets collecting system flows through the bloodstream and adsorbs targets marked by the DNA hydrogel just like the phagocytic cells would do with foreign substances marked by antibodies. By using this we can exclude antigens that we cannot exclude by the human immune system. The "DNA spider" injected from the outside would collect the antigens and the human immunes system would then exclude the DNA spider itself as an alien substance. These mechanisms can be used clinically as a revolutionary Immunomodulator. For example, we can mark cancer cells that has PD-1 ligands such as PD-L1 or PD-L2 which is treated using [1]opdivo currently; a medicine with a very high price; and make them the target of innate immune system.
We may also be able to completely exclude viruses that can hide from the immune system, or [2]phagosite dead cells that were not recognized by macrophages. [3]Unrecognized dead cells are known to cause intractable autoimmune diseases.

2. Solution for Environmental Problems

If the target is a pollutant, we can apply this to water conditioning. We can also collect rare resources by designing the resource as target.

3. Contribution to Biology

We can effectively collect live microbes by designing the microbes as targets.

Reference
[1] OPDIVO https://www.opdivo.jp
[2] Akiko Shiratsuchi (2015). 自然免疫としての細胞貪食によるアポトーシス細胞と細菌の排除機構と意義. 化学と生物 53, 38-41.
[3]Rikinari Hanayama, Masato Tanaka, Kay Miyasaka, Katsuyuki Aozasa, Masato Koike, Yasuo Uchiyama, Shigekazu Nagata (2004). Autoimmune Disease and Impaired Uptake of Apoptotic Cells in MFG-E8-Deficient Mice. Science 304(5674), 1147-1150.

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