Evidence map›Paper›PMID 35009415›Full record

ArticleMaterials (Basel, Switzerland)2021

What Is the Cause of Toxicity of Silicone Oil?

Ying Chen, Yan Lam Ip, Liangyu Zhou, Pik Yi Li, Yee Mei Chan, Wai Ching Lam, Kenneth Kai Wang Li, David H Steel, Yau Kei Chan

Abstract read
In one paragraph

Article in Materials (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
–field-weighted citation impact
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

13 citing papers in PubMed.

  1. Article
  2. Review
  3. Article
  4. Carbon footprint of Pars plana vitrectomies in rhegmatogenous retinal detachment in Germany between 2013 and 2023 - A cohort study of fluorinated gas emissions.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2025
    Article
  5. Article
  6. Review
  7. A minimum specification dataset for liquid ocular endotamponades: recommendations by a European expert panel.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2024
    Article
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. 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

9 authors.

Ying ChenDepartment of Ophthalmology, The University of Hong Kong, Hong Kong, China.
Yan Lam IpDepartment of Ophthalmology, The University of Hong Kong, Hong Kong, China.
Liangyu ZhouDepartment of Ophthalmology, The University of Hong Kong, Hong Kong, China.
Pik Yi LiDepartment of Ophthalmology, The University of Hong Kong, Hong Kong, China.
Yee Mei ChanDepartment of Ophthalmology, The University of Hong Kong, Hong Kong, China.
Wai Ching LamDepartment of Ophthalmology, The University of Hong Kong, Hong Kong, China.ORCID 0000-0003-2057-9374
Kenneth Kai Wang LiDepartment of Ophthalmology, United Christian Hospital, Hong Kong, China.ORCID 0000-0001-9440-8063
David H SteelSunderland Eye Infirmary, Sunderland SR2 9HP, UK.
Yau Kei ChanDepartment of Ophthalmology, The University of Hong Kong, Hong Kong, China.ORCID 0000-0002-1044-2668

Funding

The University of Hong Kong Seed Fund for Basic Research for New Staff, and Start-up Fund
6 · The paper itself

Abstract

purposeTo investigate the toxicity of the low-molecular-weight components (LMWCs) in ophthalmic silicone oils (SilOils) on retinal cell lines.

methodsThe toxicity of six types of LMWCs were studied and compared with conventional SilOil 1000 cSt. In vitro cytotoxic tests of LMWCs, in both liquid and emulsified forms, on three retinal cell lines (Müller cells (rMC-1), photoreceptor cells (661W) and retinal pigment epithelial cells (ARPE-19)) were conducted using a transwell cell culturing system. The morphology and viability of cells were assessed by light microscopy and Cell Counting Kit-8 (CCK-8) assay at different time points (6, 24 and 72 h). The ARPE-19 apoptotic pathway was investigated by Mitochondrial Membrane Potential/Annexin V Apoptosis Kit at different time points (6, 24 and 72 h).

resultsApart from dodecamethylpentasiloxane (L5), all liquid LMWCs showed varying degrees of acute cytotoxicity on retinal cell lines within 72 h. Emulsified LMWCs showed comparable cytotoxicity with liquid LMWCs on retinal cell lines. Cyclic LMWCs, octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5) had significantly higher cytotoxicity when compared with their linear counterparts decamethyltetrasiloxane (L4) and L5 with similar molecular formula. Using ARPE-19 cells as an example, we showed that LMWCs induce the apoptosis of retinal cells.

conclusionsMost LMWCs, in both liquid and emulsified forms, can induce acute cytotoxicity. In addition, cyclic LMWCs are suspected to have higher cytotoxicity than their linear counterparts. Therefore, LMWCs are suspected to be the main cause of the long-term toxicity of ophthalmic SilOil, due to their toxicity and propensity to cause ophthalmic SilOil to emulsify. The amount of LMWCs should be considered as the paramount parameter when referring to the quality of SilOil.

Indexed as

emulsificationlow-molecular-weight component (LMWC)Müller cell (rMC-1)photoreceptor cell (661W)polydimethylsiloxaneretinal toxicity

Identifiers

PMID35009415
PMCPMC8745808

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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.