Open Access Transdiaphragmatic Lymphatic Transport of Intraperitoneally Administered Marker in Hamsters

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Abstract:

Objective: To determine whether transdiaphragmatic transport in hamsters is similar to that described in other animals by examining transport of an intraperitoneally administered marker.

Methods: Monastral blue B suspension was administered intraperitoneally to 28 male Syrian hamsters (Mesocricetus auratus). Four hamsters each were euthanized 7, 15, and 30 min, and 1, 2, 3, and 24 h later. Specimens were examined microscopically for presence of marker.

Results: Marker was present in intrathoracic lymphatic vessels and cranial and caudal mediastinal lymph nodes by 7 min after its administration. The amount of marker in lymph nodes increased with time. The subcapsular distribution of marker was consistent with lymphatic transport. By 1 h after its administration, marker was present in the liver, spleen, bone marrow, and mesenteric and mandibular lymph nodes. Patterns of marker distribution in these tissues were consistent with hematogenous transport, but the amount of marker was considerably less than that in the intrathoracic lymph nodes at corresponding times.

Conclusions: Particulates were most likely translocated from the hamster peritoneal cavity to intrathoracic lymph nodes via transdiaphragmatic lymphatic vessels. A portion of the translocated particulates entered the blood, where they were distributed to a variety of tissues within a short time.

Document Type: Research Article

Publication date: October 1, 1999

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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