Evidence map›Paper›PMID 33927233›Full record

ArticleScientific reports2021

Urinary neopterin of wild chimpanzees indicates that cell-mediated immune activity varies by age, sex, and female reproductive status.

Jacob D Negrey, Verena Behringer, Kevin E Langergraber, Tobias Deschner

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
1.0field-weighted citation impact, top 27% 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

15 citing papers in PubMed, 18 citations in OpenAlex.

  1. Minimal Evidence of Inflammaging in Naturalistic Chimpanzee Populations.American journal of biological anthropology · 2026
    Article
  2. Review
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  4. Review
  5. Article
  6. Comparison of age-related inflammation and oxidative stress in two lemur species.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2025
    Article
  7. Article
  8. Neopterin extendsmicroPublication biology · 2025
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Evolutionary Approaches in Aging Research.Cold Spring Harbor perspectives in medicine · 2022
    Review
  14. Article
  15. Article
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

4 authors at 4 institutions in 2 countries.

Jacob D NegreyDepartment of Anthropology, Boston University, Boston, MA, 02215, USA. negrey@wisc.edu.
Verena BehringerEndocrinology Laboratory, German Primate Center, Leibniz Institute for Primate Research, 37077, Göttingen, Germany.
Kevin E LangergraberSchool of Human Evolution and Social Change, Arizona State University, Tempe, AZ, 85287, USA.
Tobias DeschnerInterim Group Primatology, Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103, Leipzig, Germany. deschner@eva.mpg.de.
Arizona State University · USGerman Primate Center · DEMax Planck Institute for Evolutionary Anthropology · DEUniversity of Wisconsin–Madison · US

Funding

Cumulative Life Course Effects on Aging and Health in a Long-Lived Primate ModelR37AG049395 · NIA · UNIVERSITY OF NEW MEXICO · PI Elizabeth Vinson Lonsdorf, Melissa Emery Thompson · 2022 to 2026
$3.2M
Biodemography of Aging in Wild ChimpanzeesR01AG049395 · NIA · UNIVERSITY OF NEW MEXICO · PI MITANI, JOHN CARY, ROSATI, ALEXANDRA G · 2015 to 2019
$2.9M
NIA NIH HHS 5R01AG049395NIA NIH HHS R01 AG049395NIA NIH HHS R37 AG049395
6 · The paper itself

Abstract

The study of free-living animal populations is necessary to understand life history trade-offs associated with immune investment. To investigate the role of life history strategies in shaping proinflammatory cell-mediated immune function, we analyzed age, sex, and reproductive status as predictors of urinary neopterin in 70 sexually mature chimpanzees (Pan troglodytes) at Ngogo, Kibale National Park, Uganda. In the absence of clinical signs of acute infectious disease, neopterin levels significantly increased with age in both male and female chimpanzees, as observed in humans and several other vertebrate species. Furthermore, males exhibited higher neopterin levels than females across adulthood. Finally, females with full sexual swellings, pregnant females, and post-reproductive females, the oldest individuals in our sample, exhibited higher neopterin levels than lactating females and cycling females without full swellings. Variation in females' neopterin levels by reproductive status is consistent with post-ovulatory and pregnancy-related immune patterns documented in humans. Together, our results provide evidence of ample variation in chimpanzee immune activity corresponding to biodemographic and physiological variation. Future studies comparing immune activity across ecological conditions and social systems are essential for understanding the life histories of primates and other mammals.

Indexed as

Immunity, CellularReproductive Physiological PhenomenaAgingAnimalsAnimals, WildFemaleLactationMaleMenstrual CycleNeopterinPan troglodytesPostmenopausePregnancySex CharacteristicsNeopterin

Identifiers

PMID33927233
PMCPMC8085242
OpenAlexW3158582649

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.