Results 81 to 90 of about 7,796 (196)

Expression and Localization of a Testis‐Specific Heat Shock Protein (CfHSP70‐2) During Spermatogenesis in the Spruce Budworm, Choristoneura fumiferana (Clem.)

Archives of Insect Biochemistry and Physiology, Volume 122, Issue 4, August 2026.
This study discovered CfHSP70‐2, a heat shock protein expressed in the testis of a forest lepidopteran pest spruce budworm, Choristoneura fumiferana, during late pupal and adult stages primarily found in round spermatids during spermatogenesis. Heat shock, starvation, and chemical heat shock protein activators were unable to alter expression.
Guoxing Quan, Hannah Soares
wiley   +1 more source

Epididymosome‐Supplemented Extender Induces Changes in Morpho‐Functional Traits and microRNA Levels of Post‐Thaw Sperm and Improves Embryo Developmental Potential

Molecular Reproduction and Development, Volume 93, Issue 8, August 2026.
ABSTRACT While molecular signature contributes to sperm quality and fertility potential, sperm may lost key molecules during cryopreservation. Since sperm cells are transcriptionally inert and rely on interactions with epididymosomes (epEVs) to acquire molecules, herein, we investigated the effects of the addition of epEVs to the cryopreservation ...
Laura Gabrielli Haupenthal, Maria Alice de Almeida, Cibele Maria Prado, Amanda Nespolo Silva, Gabriela Melendes Schneider, Paola Maria da Silva Rosa, Flávio Vieira Meirelles, Juliano Coelho da Silveira, Felipe Perecin, Maíra Bianchi Rodrigues Alves   +9 more
wiley   +1 more source

Acute Dietary Zinc Deficiency Impairs Sperm Motility but Not Gonadal mRNA Methylation in Mice

Molecular Reproduction and Development, Volume 93, Issue 8, August 2026.
Male and female mice were fed a control or zinc‐deficient diet for 6 days. In males, cauda epididymal sperm were analyzed for number, motility, and morphology, and testes were assessed by histology, while m6A mRNA methylation was measured in the testis and liver of males and the ovary and liver of females.
Ngozi O. Ibadin, Francisco J. Diaz
wiley   +1 more source

Identification of differentially expressed genes in human testis biopsies with defective spermatogenesis

Reproductive Medicine and Biology
Purpose Sperm morphology and motility are major contributors to male‐factor infertility, with many genes predicted to be involved. This study aimed to elucidate differentially expressed transcripts in human testis tissues of normal and abnormal ...
Shashika D. Kothalawala, Stefan Günther, Hans‐Christian Schuppe, Adrian Pilatz, Florian Wagenlehner, Sabine Kliesch, Liza O'Donnell, Daniela Fietz   +7 more
doaj   +1 more source

Karyotype depends on sperm head morphology in some amniote groups

Frontiers in Genetics
The karyotype of an organism is the set of gross features that characterize the way the genome is packaged into separate chromosomes. It has been known for decades that different taxonomic groups often have distinct karyotypic features, but whether ...
Eric M. Kramer, Eric M. Kramer, Joshua Enelamah, Hao Fang, P. A. Tayjasanant   +4 more
doaj   +1 more source

Three-dimensional reconstruction of rat sperm using volume electron microscopy

Acta Biochimica et Biophysica Sinica
Three-dimensional (3D) reconstruction serves as a crucial instrument for the analysis of biological structures. In particular, a comprehensive and accurate 3D ultrastructural examination of rat sperm is vital for understanding and diagnosing male ...
Liu Jiazheng, Lin Limei, Zhang Lina, Ma Hongtu, Chen Xi, Pang Keliang, Li Linlin, Han Hua   +7 more
doaj   +1 more source

FBXO24 modulates mRNA alternative splicing and MIWI degradation and is required for normal sperm formation and male fertility

eLife
Spermiogenesis is a critical, post-meiotic phase of male gametogenesis, in which the proper gene expression is essential for sperm maturation. However, the underFlying molecular mechanism that controls mRNA expression in the round spermatids remains ...
Zhiming Li, Xingping Liu, Yan Zhang, Yuanyuan Li, Liquan Zhou, Shuiqiao Yuan   +5 more
doaj   +1 more source

Notes on reproduction of Cascade frogs from California

California Fish and Wildlife Journal, 2020
Stephen R. Goldberg
doaj   +1 more source

PRAMEL12 orchestrates spermiogenesis to ensure male fertility in mice. [PDF]

J Biol Chem
Li N, Wang X, Li H, Wang Z.
europepmc   +1 more source

Transcription factor NFYA directs male meiotic entry by regulating accessible chromatin at meiotic promoters in mice. [PDF]

EMBO J
Säflund M, Askari M, Eghbali A, Abdi MM, Er DD, Östlund Farrants AK, Yu T, Özata DM.   +7 more
europepmc   +1 more source