Establishment and characterization of a squamous cell carcinoma of the vulva in tissue culture and immunologic evaluation of the host

Establishment and characterization of two squamous cell carcinoma cell lines (HYVC and HMVC) derived from vulva

Two cell lines, HYVC and HMVC, were established from cultures of the squamous cell carcinoma removed from the vulva of females of 37 and 46 years old, respectively. These cell lines were very similar in their biological characteristics, such as morphology (polygonal), growth pattern (32-43 hr of population doubling time, 50-25% of plating efficiency), heterotransplantability (1 x 10(7) cells produced squamous cell carcinomas in the nude mice), genetics (75-78 of modal chromosomal number), and producing the tumor markers (SCC and TPA). The HPV-DNA was not detected in either the HYVC or HMVC lines by using L1-PCR methods, however, it was detected in the HYVC using E6/E7-PCR.

Fibronectin and anchorage-independent and anchorage-dependent growth of benign and malignant cell lines

The presence of fibronectin in three "malignant" (AU-471, AU-436, LT-2) and two "benign" (BHK-21, WI-38) cell lines was demonstrated with a fluorescent antibody technique; two malignant (AU-471, AU-436) cell lines were fibronectin-negative and one (LT-2) retained fibronectin expression. One "benign" cell line (WI-38) expressed fibronectin, the other (BHK-21) did not. Anchorage-independent soft agar (AISA) growth correlated better with loss of fibronectin than with malignant potential. All three fibronectin-negative cell lines (benign and malignant) grew anchorage-independently (AU-471, AU-436, BHK-21), and both fibronectin-positive cell lines were anchorage-dependent (LT-2, WI-38). Surprisingly, the addition of Clg to anchorage-independent cells increased their anchorage-independent soft-agar cloning efficiency, but had no effect on anchorage-dependent cell lines. Anti-Clg antibodies decreased AISA growth. The effect of Clg on anchorage-independent growth varied with the concentration, and also between cell lines, and a variation in effect was noted between anchorage-independent (AISA) and anchorage-dependent (in flasks) growth even in the same cell line.

Effects of antibodies to choriogonadotropin in malignant growth. I. Rat 3230 AC mammary adenocarcinoma

To determine whether the in vivo production of antibodies against choriogonadotropin (CG) could modify the relationship between host and malignant growth, the effects of preimmunization with a conjugate of the beta-subunit of CG and tetanus toxoid (CG beta-tt) on the development and growth of lung metastasis following I.V. injection of R 3230 rat mammary adenocarcinoma cells into Fischer 344 female rats have been investigated. This neoplasm has been previously demonstrated to synthesize CG-like material. A test group of 70 animals and two matched control groups of 15 animals each were used. One of the control groups was untreated and the other received tetanus toxoid only. All the control animals had multiple lung foci of neoplastic cells ten days after seeding, as has been previously observed, and CG antibodies were undetectable. In contrast, a significant titer of anti-CG was found in all preimmunized animals. At the same time, the pretreated animals rarely had a few small neoplastic nodes in the entire lung sections at the standard 8--10 days post-seeding. The protective effects of preimmunization with CG beta-tt were further demonstrated by the animals living 20 days post-seeding, the absence of lung pathology in the ones killed thereafter, and by six animals that were left alive and have not shown any deterioration for more than six months after the administration of the cell suspension.