Evidence map›Paper›PMID 34385315›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Effects of sex and aging on the immune cell landscape as assessed by single-cell transcriptomic analysis.

Zhaohao Huang, Binyao Chen, Xiuxing Liu, He Li, Lihui Xie, Yuehan Gao, Runping Duan, Zhaohuai Li, Jian Zhang, Yingfeng Zheng and 1 more

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 153 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
153citing papers in PubMed, 1 pooled it
–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

153 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Trial
  4. Article
  5. Review
  6. Article
  7. Article
  8. The long-lived immune system of centenarians.Nature reviews. Immunology · 2026
    Review
  9. Review
  10. CD31Physiological reports · 2026
    Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Science advances · 2026
    Article
  16. Article
  17. Article
  18. CD8Science China. Life sciences · 2026
    Review
  19. Article
  20. Article

93 more citing papers are in PubMed but not listed here.

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.

Zhaohao HuangState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China.ORCID 0000-0002-6958-2673
Binyao ChenState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China.
Xiuxing LiuState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China.
He LiState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China.
Lihui XieState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China.
Yuehan GaoState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China.
Runping DuanState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China.ORCID 0000-0003-3679-1660
Zhaohuai LiState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China.ORCID 0000-0002-9071-6031
Jian ZhangDepartment of Clinical Research Center, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China.
Yingfeng ZhengState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China; zhyfeng@mail.sysu.edu.cn suwr3@mail.sysu.edu.cn.
Wenru SuState Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou 510060, China; zhyfeng@mail.sysu.edu.cn suwr3@mail.sysu.edu.cn.ORCID 0000-0002-0506-6362

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Sex and aging influence the human immune system, resulting in disparate responses to infection, autoimmunity, and cancer. However, the impact of sex and aging on the immune system is not yet fully elucidated. Using small conditional RNA sequencing, we found that females had a lower percentage of natural killer (NK) cells and a higher percentage of plasma cells in peripheral blood compared with males. Bioinformatics revealed that young females exhibited an overrepresentation of pathways that relate to T and B cell activation. Moreover, cell-cell communication analysis revealed evidence of increased activity of the BAFF/APRIL systems in females. Notably, aging increased the percentage of monocytes and reduced the percentage of naïve T cells in the blood and the number of differentially expressed genes between the sexes. Aged males expressed higher levels of inflammatory genes. Collectively, the results suggest that females have more plasma cells in the circulation and a stronger BAFF/APRIL system, which is consistent with a stronger adaptive immune response. In contrast, males have a higher percentage of NK cells in blood and a higher expression of certain proinflammatory genes. Overall, this work expands our knowledge of sex differences in the immune system in humans.

Indexed as

Single-Cell AnalysisAdultAgedAgingCell CommunicationCytokinesFemaleGene Expression RegulationHumansImmunosenescenceMaleMiddle AgedSex FactorsT-LymphocytesTranscriptomeYoung AdultCytokinesagingcell–cell communicationimmune responsessexsingle-cell sequencing

Identifiers

PMID34385315
PMCPMC8379935

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.