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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Physiological and Transcriptional Responses of the Blood Clam Anadara kagoshimensis (Tokunaga, 1906) During Cadmium Exposure

by
Yuxin Ren
1,2,
Fei Li
3,
Xindong Xing
1,2,
Haocheng Li
4,
Hong Yu
5,
Huiru Liu
1,2,
Zhixiong Zhou
1,2,
Xiaoyu Wang
1,2,
Jian Liang
1,2,
Chunxiu Chen
5,
Yongjun Guo
1,2,* and
Shuang Liang
1,2,*
1
Tianjin Key Laboratory of Aquatic Ecology and Aquaculture, College of Fisheries, Tianjin Agricultural University, Tianjin 300384, China
2
Key Laboratory of Smart Breeding (Co-Construction by Ministry and Province, Ministry of Agriculture and Rural Affairs), Tianjin Agricultural University, Tianjin 300384, China
3
College of Fisheries and Economy, Tangshan Maritime Institute, Tangshan 063200, China
4
Agricultural and Rural Development Service Center of Binhai New Area, Tianjin 300452, China
5
Tianjin Fisheries Research Institute, Tianjin 300221, China
*
Authors to whom correspondence should be addressed.
Toxics 2026, 14(10), 883; https://doi.org/10.3390/toxics14100883
Submission received: 27 August 2026 / Revised: 27 September 2026 / Accepted: 30 September 2026 / Published: 30 September 2026
(This article belongs to the Section Ecotoxicology)
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Abstract

Cadmium (Cd) exposure can affect metal handling, metabolism and tissue condition in bivalves on different timescales. We examined these responses in the blood clam Anadara kagoshimensis (Tokunaga, 1906) exposed to a nominal Cd concentration of 100 μg/L. Respiration, tissue Cd, redox biomarkers and histology were assessed over 480 h, alongside hepatopancreas RNA profiles at 0 h, 24 h and 21 d. Oxygen consumption reached its lowest exposed mean at 96 h. At 480 h, Cd concentrations were 44.23 ± 8.99 μg/g dry weight in the hepatopancreas and 31.75 ± 1.81 μg/g in the gill. SOD and CAT activities followed tissue-specific trajectories, GSH content declined, and MDA showed non-monotonic changes. Histological observations included epithelial detachment and disruption of digestive tubule structure. Descriptive expression comparisons identified metal handling, redox, cell-death and immune-related candidates, with more twofold expression differences at 21 d than at 24 h. qRT-PCR examined ten selected targets using three tank-derived RNA samples per time. Together, the physiological measurements, tissue observations and exploratory expression profiles describe a tissue- and time-dependent response to Cd exposure and identify candidates for further functional study.
Keywords: blood clam; cadmium; tissue burden; oxidative stress; RNA sequencing; biological pooling blood clam; cadmium; tissue burden; oxidative stress; RNA sequencing; biological pooling
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MDPI and ACS Style

Ren, Y.; Li, F.; Xing, X.; Li, H.; Yu, H.; Liu, H.; Zhou, Z.; Wang, X.; Liang, J.; Chen, C.; et al. Physiological and Transcriptional Responses of the Blood Clam Anadara kagoshimensis (Tokunaga, 1906) During Cadmium Exposure. Toxics 2026, 14, 883. https://doi.org/10.3390/toxics14100883

AMA Style

Ren Y, Li F, Xing X, Li H, Yu H, Liu H, Zhou Z, Wang X, Liang J, Chen C, et al. Physiological and Transcriptional Responses of the Blood Clam Anadara kagoshimensis (Tokunaga, 1906) During Cadmium Exposure. Toxics. 2026; 14(10):883. https://doi.org/10.3390/toxics14100883

Chicago/Turabian Style

Ren, Yuxin, Fei Li, Xindong Xing, Haocheng Li, Hong Yu, Huiru Liu, Zhixiong Zhou, Xiaoyu Wang, Jian Liang, Chunxiu Chen, and et al. 2026. "Physiological and Transcriptional Responses of the Blood Clam Anadara kagoshimensis (Tokunaga, 1906) During Cadmium Exposure" Toxics 14, no. 10: 883. https://doi.org/10.3390/toxics14100883

APA Style

Ren, Y., Li, F., Xing, X., Li, H., Yu, H., Liu, H., Zhou, Z., Wang, X., Liang, J., Chen, C., Guo, Y., & Liang, S. (2026). Physiological and Transcriptional Responses of the Blood Clam Anadara kagoshimensis (Tokunaga, 1906) During Cadmium Exposure. Toxics, 14(10), 883. https://doi.org/10.3390/toxics14100883

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