Evidence map›Paper›PMID 29126431›Full record

ArticleParasites & vectors2017

Successful long-term maintenance of Mansonella perstans in an in vitro culture system.

Abdel Jelil Njouendou, Manuel Ritter, Winston Patrick Chounna Ndongmo, Chi Anizette Kien, Gandjui Tchamatchoua Victor Narcisse, Fanny Fri Fombad, Dizzle Bita Tayong, Kenneth Pfarr, Laura E Layland, Achim Hoerauf and 1 more

Abstract read
In one paragraph

Article in Parasites & vectors, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing 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

19 citing papers in PubMed.

  1. Article
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  3. Large-scale production ofFrontiers in tropical diseases · 2024
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  4. Comparative development of human filariaeFrontiers in tropical diseases · 2024
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  5. Journal of parasitic diseases : official organ of the Indian Society for Parasitology · 2023
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  12. Complete Mitochondrial Genome Sequence ofMicrobiology resource announcements · 2020
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  13. Dataset onData in brief · 2020
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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.

Abdel Jelil NjouendouParasite and Vector Research Unit (PAVRU), Department of Microbiology and Parasitology, University of Buea, Buea, Cameroon.
Manuel RitterInstitute of Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Bonn, Germany. manuel.ritter@ukb.uni-bonn.de.
Winston Patrick Chounna NdongmoParasite and Vector Research Unit (PAVRU), Department of Microbiology and Parasitology, University of Buea, Buea, Cameroon.
Chi Anizette KienParasite and Vector Research Unit (PAVRU), Department of Microbiology and Parasitology, University of Buea, Buea, Cameroon.
Gandjui Tchamatchoua Victor NarcisseParasite and Vector Research Unit (PAVRU), Department of Microbiology and Parasitology, University of Buea, Buea, Cameroon.
Fanny Fri FombadParasite and Vector Research Unit (PAVRU), Department of Microbiology and Parasitology, University of Buea, Buea, Cameroon.
Dizzle Bita TayongParasite and Vector Research Unit (PAVRU), Department of Microbiology and Parasitology, University of Buea, Buea, Cameroon.
Kenneth PfarrInstitute of Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Bonn, Germany.
Laura E LaylandInstitute of Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Bonn, Germany.
Achim HoeraufInstitute of Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Bonn, Germany.
Samuel WanjiParasite and Vector Research Unit (PAVRU), Department of Microbiology and Parasitology, University of Buea, Buea, Cameroon.

Funding

Deutsche Forschungsgemeinschaft HO 2009/10-1
6 · The paper itself

Abstract

backgroundApproximately 114 million people are infected with Mansonella perstans in large proportions of Africa. In contrast to other filariae that infect humans, M. perstans-infected individuals show no distinct pathology or specific clinical picture, indicating a well-tuned adaptation to the host. In addition, since M. perstans adult worms reside in serous cavities which are difficult to access, research has been hindered and there is a paucity of knowledge about the biology of M. perstans, especially the development of the different life stages as well as M. perstans-driven immune responses. Thus in this study, an in vitro culture system was developed which allows an in-depth analysis of M. perstans.

resultsCulicoides species were caught in Ediki (Kumba), Southwest Region within Cameroon following a blood meal on a microfilaremic donor that had 1500 microfilariae/ml of peripheral blood and kept in captivity for 12 days at 23 °C. In a pilot experiment, 15 infective larvae were obtained from the midges and co-cultured with a confluent monolayer of monkey kidney epithelial cells (LLC-MK2) in DMEM medium supplemented with 10% FBS for up to 77 days. The resulting survival rates of 33% revealed that the cell-conditioned medium was suitable for long-term maintenance of M. perstans worms. To confirm these preliminary observations, 249 infective larvae were cultured for 50 days and their development was monitored daily and microscopically graded for motility. In total, 170 (68.3%) filariae survived and 124 (49.8%) larvae moulted between days 21-30 to become L5 stage larvae which were motile and showed continuous vigorous movement.

conclusionWe have established an in vitro culture system for the generation and long-term maintenance of viable M. perstans worms. This technique will be an important tool to study parasite biology and development, the role in host immunity, and might be helpful to discover novel treatment strategies against this filariae.

Indexed as

AnimalsCameroonCell LineCeratopogonidaeCoculture TechniquesCulture MediaEpithelial CellsHaplorhiniHumansKidneyLarvaMansonellaMansonelliasisMicrofilariaeTime FactorsCulture MediaIn vitro cultureL3 infective larvaeLong-term maintenanceMansonella perstansWorms

Identifiers

PMID29126431
PMCPMC5681788

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.