関連する実験動画
Updated: Feb 14, 2026

11:28
Culturing Microglia from the Neonatal and Adult Central Nervous System
Published on: August 9, 2013
28.9K
新生児のクロミプラミン曝露は,成人ラットにおけるエピディジマのセロトニンシグナル伝達とプログラム精子機能不全を妨害する
Herlinda Bonilla-Jaime1, Ofelia Limón-Morales1, Ernesto Rodríguez-Tobón2
1Laboratorio de Psicobiológia Conductual, Departamento de Biología de la Reproducción, Universidad Autónoma Metropolitana-Iztapalapa, Mexico City 09340, Mexico.
International journal of molecular sciences
|February 13, 2026
まとめ
選択的セロトニン再吸収阻害剤 (SSRI) であるクロミプラミン (CMI) に新生児の被曝は, epididymis のセロトニンシステムを変化させることで,永久に精子の質を害します. この初期のSSRI曝露は,5-HTホメオスタシスを破壊し,長期的な生殖機能障害につながります.
科学分野:
- 生殖生物学 生殖生物学
- 神経内分泌学の神経内分泌学
- 発達毒理学 発達毒理学
背景:
- セロトニン再吸収抑制剤 (SSRI) は,成人の精子の品質に影響を及ぼします.
- エピディディミスは精子の成熟に不可欠なセロトナーギー系を持っています.
- このシステムに対する新生児のSSRI曝露の影響は不明です.
研究 の 目的:
- 新生児のクロミプラミン (CMI) 曝露が発達中の epididymal serotonin (5-HT) システムを破壊するかどうかを調査する.
- この障害が永久的な精子機能不全を引き起こすかどうかを判断する.
主な方法:
- 新生児のオスラットは,産後8日から21日までCMI (30mg/kg) を受けた.
- 精子パラメータ (濃度,活力,形質,運動性) は3ヶ月後に評価されました.
- セロトニンのレベルは,丸と頭蓋骨 (caput, cauda) の領域で測定されました.
主要な成果:
- 新生児のCMI曝露は,長期間,地域特有の5-HTレベルにおける長期間,地域特有の変化を引き起こしました (キャプットで減少し,キューダで増加しました).
- 丸の5-HTレベルは影響を受けなかった.
- 5-HTホメオスタシスの変化は,精子濃度,生存能力,正常な形状,運動率の低下と相関する.
- ミトコンドリアの活動の増加と活性酸素種が精子で観察されました.
結論:
- エピディジマのセロトナーギー系は,新生児のSSRIプログラミングの重要なターゲットです.
- 早期のSSRI曝露は,変化した5-HTホメオスタシスを通して持続的な精子欠陥につながる可能性があります.
- この研究は,新生児のSSRI曝露と成人男性の不妊症の間のメカニズム的なリンクを確立しています.
関連する概念動画
Sperm Transport
3.7K
The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...
The maturation phase occurs in the epididymis, where sperm...
3.7K
Drugs Affecting GI Tract Motility: Serotonin Receptor Agonists
1.0K
Serotonin, a crucial neurotransmitter synthesized by enterochromaffin cells, plays a cardinal role in regulating gastrointestinal (GI) motility. With over 90% of the body's total serotonin in the GI tract, its influence on digestive processes is profound. Serotonin is swiftly released upon various stimuli, such as food boluses or certain drugs, triggering intrinsic sensory neurons in the myenteric plexus and extrinsic vagal and spinal sensory neurons. This leads to the activation of the...
1.0K
Adult Stem Cells
33.9K
Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
33.9K
Sperm Structure and Semen Composition
11.6K
During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
11.6K
Endocrine Signaling
68.2K
Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.
68.2K
Bacterial Signaling
41.3K
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
41.3K

