@article{pmid36410115,

title = {Comprehensive morphometric assessment of deltoid muscle development in children: A cross-sectional study},

author = {Teresinha Evangelista and Malick Kandji and Emmanuelle Lacene and Anaïs Chanut and Mai Thao Bui and Rudy Marty and Laurent Buffat and Kenneth Knoblauch and Brian B Rudkin and Norma Beatriz Romero},

doi = {10.1016/j.ebiom.2022.104367},

issn = {2352-3964},

year  = {2022},

date = {2022-12-01},

urldate = {2022-12-01},

journal = {EBioMedicine},

volume = {86},

pages = {104367},

abstract = {BACKGROUND: Normative values for different morphometric parameters of muscle fibres during paediatric development, i.e. from 0 to 18 years, are currently unavailable. They would be of major importance to accurately evaluate pathological changes and could be used as reference biomarkers for evaluating treatment response in clinical trials, or physiological adjustments in sports or ageing.



METHODS: Data were derived from 482 images with a total of 33 094 fibres from 10 μm cross-sections of snap-frozen muscle from 83 deltoid muscle biopsies from patients, 0-18 years, without neuromuscular pathology stained with ATPase 9.4. Data was acquired and analysed with patented image analysis algorithms from "CARPACCIO.cloud". Several parameters were extracted or calculated, including cross-sectional area (CSA), fibre type, circularity, as well as the Minimum diameter of Feret (MinFeret).



FINDINGS: This study illustrates changes in quantitative parameters for muscle morphology over the course of paediatric development and the pivotal changes occurring around puberty. Only fibre size parameters (MinFeret, CSA) are dependent on gender, and only after puberty. All other parameters vary in a similar manner for females and males. The proportion of type 1 fibres is essentially constant from birth to age 10, decreasing to ≈40% by age 18. Circularity decreases with age, to plateau after age 10 for both fibre types.



INTERPRETATION: Normative values and reference charts for muscle fibre types in this age range have been generated to allow comparison of data from patients in pathology laboratories working on neuromuscular diseases.



FUNDING: BPI FRANCE, PULSALYS, Association de l'Institut de Myologie, French National Research Agency (ANR), LABEX CORTEX of Université de Lyon.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{pmid36065187,

title = {CD8 memory precursor cell generation is a continuous process},

author = {Helena Todorov and Margaux Prieux and Daphne Laubreton and Matteo Bouvier and Shaoying Wang and Simon de Bernard and Christophe Arpin and Robrecht Cannoodt and Wouter Saelens and Arnaud Bonnaffoux and Olivier Gandrillon and Fabien Crauste and Yvan Saeys and Jacqueline Marvel},

doi = {10.1016/j.isci.2022.104927},

issn = {2589-0042},

year  = {2022},

date = {2022-09-01},

urldate = {2022-09-01},

journal = {iScience},

volume = {25},

number = {9},

pages = {104927},

abstract = {In this work, we studied the generation of memory precursor cells following an acute infection by analyzing single-cell RNA-seq data that contained CD8 T cells collected during the postinfection expansion phase. We used different tools to reconstruct the developmental trajectory that CD8 T cells followed after activation. Cells that exhibited a memory precursor signature were identified and positioned on this trajectory. We found that these memory precursors are generated continuously with increasing numbers arising over time. Similarly, expression of genes associated with effector functions was also found to be raised in memory precursors at later time points. The ability of cells to enter quiescence and differentiate into memory cells was confirmed by BrdU pulse-chase experiment . Analysis of cell counts indicates that the vast majority of memory cells are generated at later time points from cells that have extensively divided.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Silic2022,

title = {Gene profiling reveals a contact allergy signature in most  positive Amerchol L-101 patch test reactions},

author = {Linda Ljungberg Silic and Marine-Alexia Lefevre and Ola Bergendorff and Simon De Bernard and Julien Nourikyan and Laurent Buffat and Audrey Nosbaum and Magnus Bruze and Jean-Franc cois Nicolas and Cecilia Svedman and Marc Vocanson},

year  = {2022},

date = {2022-07-01},

urldate = {2022-07-01},

journal = {Contact Dermatitis},

volume = {87},

number = {1},

pages = {40--52},

publisher = {Wiley},

abstract = {BACKGROUND: Diagnosis of contact allergy (CA) to Amerchol L-101 

 (AL-101), a marker for lanolin allergy, is problematic. Positive 

 patch test reactions are frequently doubtful or weakly positive 

 and difficult to associate with clinical relevance. OBJECTIVE: 

 To gain further insight on the allergic or irritant nature of 

 skin reactions induced by AL-101 patch test. METHODS: We 

 re-tested in a dose-response fashion, 10 subjects with AL-101 CA 

 and performed comprehensive transcriptomic analysis (gene 

 arrays, quantitative real-time polymerase chain reaction 

 [qRT-PCR]) of samples of their skin reactions. RESULTS: Eight of 

 the 10 CA subjects reacted positively upon re-test, whereas two 

 did not react. Most of AL-101 positive patch tests expressed an 

 allergy signature with strong activation of gene modules 

 associated with adaptive immunity and downregulation of 

 cornification pathway genes. In addition, the breadth of gene 

 modulation correlated with the magnitude of patch test reactions 

 and the concentration of AL-101 applied. However, we observed 

 that some of the positive patch test reactions to AL-101 

 expressed no/few allergy biomarkers, suggesting the induction of 

 an irritant skin inflammation in these samples. CONCLUSIONS: 

 This study confirms that AL-101 is an allergen that can cause 

 both contact allergy and contact irritation. Our results also 

 highlight that molecular profiling might help to strengthen 

 clinical diagnosis.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}