Evidence map›Paper›PMID 36170380›Full record

ArticleScience robotics2022

Gastrointestinal tract drug delivery using algae motors embedded in a degradable capsule.

Fangyu Zhang, Zhengxing Li, Yaou Duan, Amal Abbas, Rodolfo Mundaca-Uribe, Lu Yin, Hao Luan, Weiwei Gao, Ronnie H Fang, Liangfang Zhang and 1 more

Open access · greenAbstract read
In one paragraph

Article in Science robotics, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
18.3field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

47 citing papers in PubMed, 146 citations in OpenAlex.

  1. Review
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  5. Miniature Soft Robot With Magnetically Reprogrammable Surgical Functions.Advanced materials (Deerfield Beach, Fla.) · 2026
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  11. Pharmaceutics · 2026
    Article
  12. Article
  13. Review
  14. Stable magnetic soft structures.Science advances · 2025
    Article
  15. Review
  16. Review
  17. Micro/Nano-Motors for Enhanced Tumor Diagnosis and Therapy.International journal of molecular sciences · 2025
    Review
  18. Article
  19. Review
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors at 1 institution in 1 country.

Fangyu ZhangDepartment of NanoEngineering and Chemical Engineering Program, University of California San Diego, La Jolla, CA 92093, USA.ORCID 0000-0002-6522-5230
Zhengxing LiDepartment of NanoEngineering and Chemical Engineering Program, University of California San Diego, La Jolla, CA 92093, USA.ORCID 0000-0002-0250-0936
Yaou DuanDepartment of NanoEngineering and Chemical Engineering Program, University of California San Diego, La Jolla, CA 92093, USA.ORCID 0000-0003-1420-9000
Amal AbbasDepartment of NanoEngineering and Chemical Engineering Program, University of California San Diego, La Jolla, CA 92093, USA.ORCID 0000-0001-5796-1601
Rodolfo Mundaca-UribeDepartment of NanoEngineering and Chemical Engineering Program, University of California San Diego, La Jolla, CA 92093, USA.
Lu YinDepartment of NanoEngineering and Chemical Engineering Program, University of California San Diego, La Jolla, CA 92093, USA.ORCID 0000-0002-5075-5263
Hao LuanDepartment of NanoEngineering and Chemical Engineering Program, University of California San Diego, La Jolla, CA 92093, USA.ORCID 0000-0003-1251-7480
Weiwei GaoDepartment of NanoEngineering and Chemical Engineering Program, University of California San Diego, La Jolla, CA 92093, USA.ORCID 0000-0001-5196-4887
Ronnie H FangDepartment of NanoEngineering and Chemical Engineering Program, University of California San Diego, La Jolla, CA 92093, USA.
Liangfang ZhangDepartment of NanoEngineering and Chemical Engineering Program, University of California San Diego, La Jolla, CA 92093, USA.ORCID 0000-0003-0637-0654
Joseph WangDepartment of NanoEngineering and Chemical Engineering Program, University of California San Diego, La Jolla, CA 92093, USA.ORCID 0000-0002-4921-9674
University of California San Diego · US

Funding

Tumor-Targeted Chemo-Immunotherapy for Osteosarcoma MetastasisR01CA200574 · NCI · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI LI, SHULIN, ZHANG, LIANGFANG · 2016 to 2020
$1.8M
Motorized delivery of bacterial antigens to mucosal barriers to enhance immunity against infectionR21AI159492 · NIAID · UNIVERSITY OF CALIFORNIA, SAN DIEGO · PI FANG, RONNIE H · 2022 to 2023
$435k
NCI NIH HHS R01 CA200574NIAID NIH HHS R21 AI159492
6 · The paper itself

Abstract

The use of micromotors for active drug delivery via oral administration has recently gained considerable interest. However, efficient motor-assisted delivery into the gastrointestinal (GI) tract remains challenging, owing to the short propulsion lifetime of currently used micromotor platforms. Here, we report on an efficient algae-based motor platform, which takes advantage of the fast and long-lasting swimming behavior of natural microalgae in intestinal fluid to prolong local retention within the GI tract. Fluorescent dye or cell membrane-coated nanoparticle functionalized algae motors were further embedded inside a pH-sensitive capsule to enhance delivery to the small intestines. In vitro, the algae motors displayed a constant motion behavior in simulated intestinal fluid after 12 hours of continuous operation. When orally administered in vivo into mice, the algae motors substantially improved GI distribution of the dye payload compared with traditional magnesium-based micromotors, which are limited by short propulsion lifetimes, and they also enhanced retention of a model chemotherapeutic payload in the GI tract compared with a passive nanoparticle formulation. Overall, combining the efficient motion and extended lifetime of natural algae-based motors with the protective capabilities of oral capsules results in a promising micromotor platform capable of achieving greatly improved cargo delivery in GI tissue for practical biomedical applications.

Indexed as

Fluorescent DyesMagnesiumAnimalsCapsulesDrug Delivery SystemsGastrointestinal TractMiceCapsulesFluorescent DyesMagnesium

Identifiers

PMID36170380
PMCPMC9884493
OpenAlexW4297502025

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.