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Articles 361 - 390 of 2152
Full-Text Articles in Medical Specialties
Unusual Lymphomas Developing In Chronic Lymphocytic Leukemia, Sundara B. K. Raman, Sheikh M. Saeed, Joseph P. Abraham
Unusual Lymphomas Developing In Chronic Lymphocytic Leukemia, Sundara B. K. Raman, Sheikh M. Saeed, Joseph P. Abraham
Henry Ford Hospital Medical Journal
We report three patients with chronic lymphocytic leukemia (CLL) who developed malignant lymphomas of unusual character and modes of presentation. Two of the patients had received low doses of chlorambucil for several years before they developed malignant lymphoma, diffuse, large cell type (LCL). In one of these patients LCL manifested as a grossly evident osteolytic lesion. In the second patient LCL developed initially as a localized lesion in the iliac bone. Both patients died within a few weeks after LCL was diagnosed. The third patient, who was found to have CLL during a routine examination, did not receive any therapy …
T-Cell Lymphoma In Renal Transplant Recipient, Koichi Maeda, Leslie Bricker, Chan K. Ma, Michael J. Deegan
T-Cell Lymphoma In Renal Transplant Recipient, Koichi Maeda, Leslie Bricker, Chan K. Ma, Michael J. Deegan
Henry Ford Hospital Medical Journal
A 35-year-old woman, who had a renal transplant flve years ago, developed malignant lymphoma of the mediastinum. The lymphoma was of lymphoblastic type and had T-cell immunophenotype. Most transplant-related lymphomas are of B-cell type. T-cell lymphoma in this setting is extremely rare, and the mechanism of development may be different from that of B-cell lymphomas.
Obstructing Giant Pseudopolyposis Of The Colon In Ulcerative Colitis, Roberta E. Sonnino, Farouck N. Obeid
Obstructing Giant Pseudopolyposis Of The Colon In Ulcerative Colitis, Roberta E. Sonnino, Farouck N. Obeid
Henry Ford Hospital Medical Journal
Pseudopolyposis of the colon is a well-recognized local complication of ulcerative colitis. Giant pseudopolyposis is uncommon, and its presentation as a complete obstruction of the colon is a rare occurrence. We report such a case, where retrograde flow of barium on double-contrast barium enema was completely obstructed at midtransverse colon. After resection by total abdominal colectomy, pathology examination ofthe specimen confirmed massive pseudopolyposis without malignancy. A brief review of the pathology and current literature is presented.
Ocular Irrigating Solutions: A Comparison Between Balanced Salt Solution And L-410 (Po-Eis), Philip C. Hessburg, Paul M. Johnston
Ocular Irrigating Solutions: A Comparison Between Balanced Salt Solution And L-410 (Po-Eis), Philip C. Hessburg, Paul M. Johnston
Henry Ford Hospital Medical Journal
The ability of two ocular irrigating solutions to reduce postoperative corneal edema after intracapsular cataract extraction was compared using ultrasonic pachymetry. All patients had anterior chamber intraocular lenses implanted. The solutions were balanced salt solution and solution L-410 (PO-EIS), an eye irrigation solution containing dextran 40 and bicarbonate. Corneas irrigated with either solution showed no significant difference in postoperative edema. The use of L-410 (as an alternative to balanced salt solution) may not be necessary in intracapsular cataract extraction.
Melvin A. Block, Md, Gary B. Talpos
Melvin A. Block, Md, Gary B. Talpos
Henry Ford Hospital Medical Journal
No abstract provided.
Book Review: Guides To Clinical Aspiration Biopsy: Thyroid, John E. Brunner
Book Review: Guides To Clinical Aspiration Biopsy: Thyroid, John E. Brunner
Henry Ford Hospital Medical Journal
No abstract provided.
Thyroid C-Cell Hyperplasia And Micronodules In Close Relatives Of Men-2 A Patients: Pitfalls In Early Diagnosis And Reevaluation Of Criteria For Surgery, Cees J. M. Lips, John R. Leo, Marianne J. H. Berends, Werner H. Minder, A. P. Roeland Blok, Rolf A. Geerdink, Wil H. L. Hackeng, Jan M. M. Roelofs, Hans F. A. Vasen, Jan K. Vette
Thyroid C-Cell Hyperplasia And Micronodules In Close Relatives Of Men-2 A Patients: Pitfalls In Early Diagnosis And Reevaluation Of Criteria For Surgery, Cees J. M. Lips, John R. Leo, Marianne J. H. Berends, Werner H. Minder, A. P. Roeland Blok, Rolf A. Geerdink, Wil H. L. Hackeng, Jan M. M. Roelofs, Hans F. A. Vasen, Jan K. Vette
Henry Ford Hospital Medical Journal
In a large family with multiple endocrine neoplasia rype 2 A (MEN-2 A), 20 patients were identified by the diagnosis of medullary thyroid carcinoma (MTC) and/or pheochromocytomas. Another five subjects had neck surgery on the basis of slightly increased results of a C-cell provocative test. Retrospectively, however, although the immunohistochemical diagnosis of C-cell hyperplasia was confirmed, the diagnosis of MEN-2 was doubtful in these five subjects, and the C-cell hyperplasia observed was probably within the limits of normal variation. The occurrence of C-cell hyperplasia in a normal population was investigated by a C-cell provocative test, as well as in random …
Plasma And Tumor Levels Of Somatostatin (Srif) And Somatostatin Immunochemistry In Medullary Thyroid Carcinoma: Apparently Discrepant Preliminary Results, B. Franc, J. A. Chayvialle, E. Modigliani, C. Calmettes, B. Caillou, N. Dutrieux-Berger, C. Houdent, M. Kujas
Plasma And Tumor Levels Of Somatostatin (Srif) And Somatostatin Immunochemistry In Medullary Thyroid Carcinoma: Apparently Discrepant Preliminary Results, B. Franc, J. A. Chayvialle, E. Modigliani, C. Calmettes, B. Caillou, N. Dutrieux-Berger, C. Houdent, M. Kujas
Henry Ford Hospital Medical Journal
Eighteen cases of medullary thyroid carcinoma (MTC) (11 hereditary) had parallel measurements of basal plasma levels of somatostatin (SRIF), levels of SRIF extracted from fresh tumor tissue (radioimmunoassay), and immunohistochemistry (peroxidase-antiperoxidase method) using an anti-SRIF antibody on paraffin sections. Immunohistochemistry disclosed some cell positivity in nine cases (50%). Plasma levels of SRIF were above normal (> 50 pg/mL expressed in terms of the 14 amino acid SRIF peptide) in only two of 12 patients. Extraction of fresh tumor tissue detected SRIF in 60% of our cases: two patients > l.200pg/mg (equivalents 14). with the other positive values ranging between 13 and …
Impact Of Prospective Screening For Multiple Endocrine Neoplasia Type 2, Robert F. Gagel, Armen H. Tashjian Jr., Tim Cummings, Nick Papathanasopoulos, Seymour Reichlin
Impact Of Prospective Screening For Multiple Endocrine Neoplasia Type 2, Robert F. Gagel, Armen H. Tashjian Jr., Tim Cummings, Nick Papathanasopoulos, Seymour Reichlin
Henry Ford Hospital Medical Journal
Prospective annual screening for hereditary medullary thyroid carcinoma (MTC) in the J-kindred, currently a 117-member family with multiple endocrine neoplasia type 2A, began in 1969. During the initial screening, 12 patients were found to have MTC. Subsequent screening has detected C-cell abnormalities (C-cell hyperplasia or microscopic MTC) in 22 of 23 addilional family members thyroidectomized for abnormal calcium- or pentagastrin-provocative calcitonin (CT) test results. Seven of the initial 12 patients thyroidectomized in 1970 to 1971 and 19 of 23 individuals thyroidectomized since 1971 remain disease-free by all criteria; three patients thyroidectomized since 1971 have had clearly abnormal serum CT measurements …
Subtotal Adrenalectomy In Multiple Endocrine Neoplasia Type 2, Bertil Hamberger, Margareta Telenius-Berg, Bjorn Cedermark, Staffan Grondal, Bengt-Goran Hansson, Sigbritt Werner
Subtotal Adrenalectomy In Multiple Endocrine Neoplasia Type 2, Bertil Hamberger, Margareta Telenius-Berg, Bjorn Cedermark, Staffan Grondal, Bengt-Goran Hansson, Sigbritt Werner
Henry Ford Hospital Medical Journal
We report two patients in whom pheochromocytoma was treated by subtotal adrenalectomy leaving a rim of vascularized cortical tissue in situ. Both patients are doing well without cortisol supplementation although they have subnormal cortisol responses to ACTH stimulation.
Application Of Minisatellite Dna Probes To Linkage In Men-2, Bruce A. J. Ponder, Alec J. Jeffreys, Nicola E. Hartley, Clare Carter, Douglas F. Easton, Hakan Telenius, Margareta Telenius-Berg
Application Of Minisatellite Dna Probes To Linkage In Men-2, Bruce A. J. Ponder, Alec J. Jeffreys, Nicola E. Hartley, Clare Carter, Douglas F. Easton, Hakan Telenius, Margareta Telenius-Berg
Henry Ford Hospital Medical Journal
We describe the potential benefits and the limitations of the use of highly polymorphic minisatellite DNA probes for genetic linkage analysis of multiple endocrine neoplasia type 2A (MEN-2 A). The advantage of these probes is that up to 34 loci can be examined in a single experiment, and since the loci are highly polymorphic, almost every individual in every family is informative. The disadvantage is that the DNA fragment lengths of the alleles at any given locus differ from one family to another, so that families cannot be combined, and large single sibships are needed to obtain significant linkage data. …
One Large Kindred Excludes A Locus For Multiple Endocrine Neoplasia Type 2a From About 25% Of The Human Autosomal Genetic Map, Andrew J. Pakstis, Judith R. Kidd, Carmela M. Castiglione, Beth A. Pletcher, Patricia D. Murphy, Lindsay A. Farrer, Myron Genel, Kenneth K. Kidd
One Large Kindred Excludes A Locus For Multiple Endocrine Neoplasia Type 2a From About 25% Of The Human Autosomal Genetic Map, Andrew J. Pakstis, Judith R. Kidd, Carmela M. Castiglione, Beth A. Pletcher, Patricia D. Murphy, Lindsay A. Farrer, Myron Genel, Kenneth K. Kidd
Henry Ford Hospital Medical Journal
This report presents pairwise linkage results from our search for the locus of the gene (MEN2A) for the multiple endocrine neoplasia type 2A (MEN-2A) syndrome in one large kindred (the N kindred), clearly segregating for an autosomal dominant form. About 25% of the autosomal genome is excluded when these new results are combined with those we have published previously. The genetic markers employed are distributed across at least 19 of the 22 autosomes. Seven genetic markers whose chromosomal locations are not yet established have also been studied.
Immunohistochemistry In Medullary Thyroid Carcinoma: Prognosis And Distinction Between Hereditary And Sporadic Tumors, B. Franc, B. Caillou, A. M. Carrier, N. Dutrieux-Berger, J. Floquet, M. Houcke, E. Justrabo, F. Lange, A. Pages, C. Rigaud, A. Schwartz, M. Viennet, M. F. Lebodic
Immunohistochemistry In Medullary Thyroid Carcinoma: Prognosis And Distinction Between Hereditary And Sporadic Tumors, B. Franc, B. Caillou, A. M. Carrier, N. Dutrieux-Berger, J. Floquet, M. Houcke, E. Justrabo, F. Lange, A. Pages, C. Rigaud, A. Schwartz, M. Viennet, M. F. Lebodic
Henry Ford Hospital Medical Journal
In this retrospective study of 68 cases of medullary thyroid carcinoma (MTC), morphological features were studied, which could be helpful in prognosis and in the distinction between hereditary and sporadic forms of the disease. Necrosis within the tumors seemed to carry a poor prognosis. Bilateral MTC. unquestionable C-cell hyperplasia, glandular or follicular pattern, and thyroglobulin-positive cells seemed to be more prevalent in hereditary forms of the disease. A smaller proportion of calcitonin-immunoreactive cells were encountered in hereditary tumors than in sporadic tumors.
Different Mechanisms Of Calcitonin, Calcitonin Gene-Related Peptide, And Somatostatin Regulation By Glucocorticoids In A Cell Culture Of Human Medullary Thyroid Carcinoma, Gilbert J. Cote, Robert F. Gagel
Different Mechanisms Of Calcitonin, Calcitonin Gene-Related Peptide, And Somatostatin Regulation By Glucocorticoids In A Cell Culture Of Human Medullary Thyroid Carcinoma, Gilbert J. Cote, Robert F. Gagel
Henry Ford Hospital Medical Journal
We have employed the TT cell line, a model for the human medullary thyroid carcinoma cell, lo study the regulation of peptide hormone production by glucocorticoids. Complementary DNA probes were used to measure the calcitonin (CT), CT gene-related peptide (CGRP), and somatostatin (SRIF) mRNA levels. Dose-response experiments in serum-free medium showed that dexamethasone (six-day treatment) lowered somatostatin (to 1% of basal) and CGRP mRNA (to 50% of basal) and stimulated CT mRNA (threefold to thirteenfold) with a half-maximal effective concentration of 10−8 M. Time course studies for cells continuously exposed to 10−6 M dexamethasone showed a rapid (within …
The Second International Workshop On Multiple Endocrine Neoplasia Type 2 Syndromes, Bruce A. J. Ponder, Charles E. Jackson
The Second International Workshop On Multiple Endocrine Neoplasia Type 2 Syndromes, Bruce A. J. Ponder, Charles E. Jackson
Henry Ford Hospital Medical Journal
No abstract provided.
Screening In Medullary Thyroid Carcinoma, C. Calmettes
Screening In Medullary Thyroid Carcinoma, C. Calmettes
Henry Ford Hospital Medical Journal
The four-year experience of the French collaborative study on medullary thyroid carcinoma (MTC) has permitted improvement in family screening by a common discussion of data and a network of coordinators throughout France involved in the detection of new cases. Investigations have been directed at improving the discrimination between sporadic and hereditary forms of MTC and between individuals who have or have not inherited the disease within families.
Men-2 Syndrome: The Value Of Screening And Central Registration; A Study Of Six Kindreds In The Netherlands, H. F. A. Vasen, A. C. Nieuwenhuijzen Kruseman, A. M. J. Moers, C. J. M. Lips, E. K. M. Beukers, W. M. Wiersinga, R. A. Geerdink
Men-2 Syndrome: The Value Of Screening And Central Registration; A Study Of Six Kindreds In The Netherlands, H. F. A. Vasen, A. C. Nieuwenhuijzen Kruseman, A. M. J. Moers, C. J. M. Lips, E. K. M. Beukers, W. M. Wiersinga, R. A. Geerdink
Henry Ford Hospital Medical Journal
Since 1975, six families with the MEN-2A syndrome including 66 patients have been identified in The Netherlands. All these patients underwent thyroidectomy for C-cell hyperplasia and/or medullary thyroid carcinoma (MTC); eight were symptomatic (Group A), 51 were relatives of patients found to be affected (Group B), and seven had had a negative screening test that became positive (Group C). To assess the effect of screening, we compared these groups with respect to the occurrence of metastatic MTC at thyroidectomy and the results of the postoperative calcitonin (CT) tests. We found that 87% of Group A, 37% of Group B; and …
Characteristics Of A Family With The Men-2a Syndrome, Harm R. Haak, Arie C. Nieuwenhuijzen Kruseman
Characteristics Of A Family With The Men-2a Syndrome, Harm R. Haak, Arie C. Nieuwenhuijzen Kruseman
Henry Ford Hospital Medical Journal
Results of screening and follow-up in a family with the MEN-2A syndrome are described. Fourteen (83%) subjects at risk were affected with medullary thyroid carcinoma (MTC). Asymptomatic pheochromocytoma and parathyroid hyperplasia were found in two instances each. Intrathyroidal MTC without metastases was found in the four youngest subjects and was associated with normal basal but abnormal pentagastrin-stimulated calcitonin (CT) levels. In the ten subjects with abnormal basal CT levels, metastatic spread to at least regional lymph nodes was found. In eight of these ten subjects, total thyroidectomy with excision of affected lymph nodes and additional radioiodine did not return CT …
Multiple Endocrine Neoplasia Type 2a: A Northern Ireland And Australian Family, David R. Hadden, Fergus O'Reilly, Laurence Kennedy, Colin Russell
Multiple Endocrine Neoplasia Type 2a: A Northern Ireland And Australian Family, David R. Hadden, Fergus O'Reilly, Laurence Kennedy, Colin Russell
Henry Ford Hospital Medical Journal
A Northern Ireland/Australian family with multiple endocrine neoplasia type 2A is described. Three members of the first generation studied have died, two men (aged 35 and 51) as a result of metastatic medullary thyroid carcinoma and one woman (the index case, aged 50) due to hypertensive complications during thyroidectomy from an undiagnosed pheochromocytoma. All members of this family found by screening to have either medullary thyroid carcinoma or pheochromocytoma, or both, have been asymptomatic for their disease.
Screening For Early Asymptomatic Pheochromocytoma In Men-2, Margareta Telenius-Berg, Bertel Berg, Bertil Hamberger, Sten Tibblin
Screening For Early Asymptomatic Pheochromocytoma In Men-2, Margareta Telenius-Berg, Bertel Berg, Bertil Hamberger, Sten Tibblin
Henry Ford Hospital Medical Journal
Pheochromocytoma is a major cause of morbidity in multiple endocrine neoplasia type 2. We recommend a similar diagnostic screening approach for early asymptomatic pheochromocytoma as is generally accepted for asymptomatic medullary thyroid carcinoma. We present a new provocative test for early asymptomatic pheochromocytoma. Plasma epinephrine levels and epinephrine/dopamine ratios after physical exercise seem to have higher sensitivity than basal plasma catecholamine levels. Specificity is high especially for discrimination from neurovegetative lability, which is the clinically most important differential diagnosis.
Calcitonin Gene-Related Peptide And Calcitonin In Men-2 And Sporadic Pheochromocytomas: An Immunohistochemical Study, Lis Johannsen, Henrik Daa Schroder, Soren Schifter
Calcitonin Gene-Related Peptide And Calcitonin In Men-2 And Sporadic Pheochromocytomas: An Immunohistochemical Study, Lis Johannsen, Henrik Daa Schroder, Soren Schifter
Henry Ford Hospital Medical Journal
Ten pheochromocytomas (five from patients with multiple endocrine neoplasia type 2 and five sporadic) were stained immunohistochemically with antibodies to calcitonin (CT) and calcitonin gene-related peptide (CGRP) by means of the peroxidase-antiperoxidase method. CGRP positive cells were found in variable numbers in all of the investigated tumors. No demonstrable difference was noted between the hereditary tumors and the sporadic tumors. Staining with CT antibody also showed cells with a positive reaction in eight of ten tumors. The distribution of the two peptides was similar, and in some cells their coexistence was visualized. Pheochromocytomas thus represent an alternative site to medullary …
Calcitonin Gene Peptides: The Diagnostic Value Of Measurement In Medullary Thyroid Carcinoma, Samia I. Girgis, Catherine Lynch, Carmel J. Hillyard, John C. Stevenson, Patricia A. Hill, David W. R. Macdonald, Iain Macintyre
Calcitonin Gene Peptides: The Diagnostic Value Of Measurement In Medullary Thyroid Carcinoma, Samia I. Girgis, Catherine Lynch, Carmel J. Hillyard, John C. Stevenson, Patricia A. Hill, David W. R. Macdonald, Iain Macintyre
Henry Ford Hospital Medical Journal
The calcitonin gene encodes a family of peptides, at least three of which normally circulate in man: calcitonin (CT), a calcium-lowering hormone; katacalcin (KC), a peptide of unknown function; and calcitonin gene-related peptide (CGRP), a neuropeptide and potent vasodilator. In a study of 45 patients with medullary thyroid carcinoma (MTC), plasma CGRP was elevated in approximately 50% of cases. Furthermore, CGRP levels did not correlate with CT levels. However, plasma KC was elevated in all cases, with a good correlation with CT levels, as has been noted previously. Measurement of CT or KC appears to be superior to measurement of …
Clinical Value Of Calcitonin And Carcinoembryonic Antigen Doubling Times In Medullary Thyroid Carcinoma, Charles E. Jackson, Robert A. Norum, Gary B. Talpos, Carolyn S. Feldkamp, Armen H. Tashjian Jr.
Clinical Value Of Calcitonin And Carcinoembryonic Antigen Doubling Times In Medullary Thyroid Carcinoma, Charles E. Jackson, Robert A. Norum, Gary B. Talpos, Carolyn S. Feldkamp, Armen H. Tashjian Jr.
Henry Ford Hospital Medical Journal
Doubling times of basal and stimulated calcitonin (CT) levels and of random carcinoembryonic antigen (CEA) levels were compared over time in 11 patients with residual medullary thyroid carcinoma (MTC)—five with the sporadic MTC and six with the hereditary MTC. Four patients with an indolent form of the disease showed little change in CT levels over three to eight years and little change in CEA doubling times (42 to 70+ months). Seven patients showing rapid progression of disease had CT doubling times of three to 11 months and CEA doubling times of two to 12 months (however, one patient showed no …
Importance Of Ultrasound Examination For The Follow-Up Of Medullary Thyroid Carcinoma: Comparison With Other Localization Methods, Karin Frank, Friedhelm Raue, Dorothea Lorenz, Christian Herfarth, Reinhard Ziegler
Importance Of Ultrasound Examination For The Follow-Up Of Medullary Thyroid Carcinoma: Comparison With Other Localization Methods, Karin Frank, Friedhelm Raue, Dorothea Lorenz, Christian Herfarth, Reinhard Ziegler
Henry Ford Hospital Medical Journal
Ultrasound examinations for the follow-up of 41 patients with histologically proven medullary thyroid carcinoma (MTC) were done regularly at three- to six-month intervals. In patients with elevated serum calcitonin (CT) levels, other localization methods such as computed tomography, selective venous catheterization with measurement of CT levels, and fine-needle aspiration were performed. Thirty-four tumor recurrences in the neck were suspected by ultrasound examination in 23 patients with postoperatively elevated CT levels. The smallest occult MTC nodule had a diameter of 8 mm. One nodule was hyperechogenic with hypoechoic lesions, one was isoechoic with a halo, and all others were hypoechoic. Seventeen …
Radionuclide Imaging In Medullary Thyroid Carcinoma: Evaluation Of Two New Radiopharmaceuticals, S. E. M. Clarke, C. R. Lazarus, M. N. Maisey
Radionuclide Imaging In Medullary Thyroid Carcinoma: Evaluation Of Two New Radiopharmaceuticals, S. E. M. Clarke, C. R. Lazarus, M. N. Maisey
Henry Ford Hospital Medical Journal
We assessed the uptake of two new radiopharmaceuticals, 131I meta-iodo-benzylguanidine (MIBG) and 99mTc(V) dimercaptosuccinic acid (DMSA), in patients with histologically proven medullary thyroid carcinoma (MTC). MIBG detected tumor in 40% of patients with known primary or recurrent tumor. 99m Tc(V) DMSA successfully demonstrated primary and recurrent tumor in 86% of patients imaged, with true negative results in 100% of patients imaged after successful surgical resection and a false-negative rate of 14%. We therefore suggest that 99m Tc(V) DMSA is the imaging agent of choice in patients with both primary and recurrent disease. 131I MIBG, with its high false-negative rate, has …
A Two-Site Immunoradiometric Assay For Serum Calcitonin Using Monoclonal Anti-Peptide Antibodies, Philippe Motte, Malika Ait-Abdellah, Pascal Vauzelle, Paule Gardet, Claude Bohuon, Dominique Bellet
A Two-Site Immunoradiometric Assay For Serum Calcitonin Using Monoclonal Anti-Peptide Antibodies, Philippe Motte, Malika Ait-Abdellah, Pascal Vauzelle, Paule Gardet, Claude Bohuon, Dominique Bellet
Henry Ford Hospital Medical Journal
We have produced a library of monoclonal antibodies of various affinities by immunizing mice with synthetic calcitonin (CT) 1-32. These monoclonal antibodies defined two antigenic determinants on the molecule of CT. The first was located in the 11-17 region of the hormone: the second was present on the 26-32 portion of CT. The C-terminal epitope was restricted to the mature form of the hormone and immunologically silent on synthetic peptides with sequences analogous lo the biosynthetic precursors for CT. Using two high-affinity monoclonal antibodies, designated as CT07 and CT08, we developed a two-site immunoradiometric assay (m-lRMA) for serum CT. This …
In Vitro Secretion Of Peptides Of The Calcitonin Family: Calcitonin, Katacalcin, And Calcitonin Gene-Related Peptide, Friedhelm Raue, Hubert Serve, Eckard Rix, Reinhard Ziegler
In Vitro Secretion Of Peptides Of The Calcitonin Family: Calcitonin, Katacalcin, And Calcitonin Gene-Related Peptide, Friedhelm Raue, Hubert Serve, Eckard Rix, Reinhard Ziegler
Henry Ford Hospital Medical Journal
A tissue culture explant and a primary cell culture of malignant C-cells have been estabUshed to study the secretion pattern of calcitonin (CT), katacalcin (KC), and CT gene-related peptide (CGRP) in vitro under different conditions. Within the first five days of culture the spontaneous secretion of the peptides in both systems dropped to and remained at a constant level. With increasing calcium (Ca) concentration in the medium, a dose dependent release of CT, KC and, in cell culture, of CGRP was observed. BAY-K-8644. an analog of the Ca channel blocker nifedipine, enhanced the CT secretion to the same extent as …
Localization Of A Radiolabeled Monoclonal Antibody To Calcitonin In Rat Medullary Thyroid Carcinoma Allografts, Naguib A. Samaan, Kuo-Pao Yang
Localization Of A Radiolabeled Monoclonal Antibody To Calcitonin In Rat Medullary Thyroid Carcinoma Allografts, Naguib A. Samaan, Kuo-Pao Yang
Henry Ford Hospital Medical Journal
A radiolabeled anticalcitonin monoclonal antibody (MoAb) was testedfor tumor-localizing capability in WAG/Rij rats allografted with cultured medullary thyroid carcinoma cells (line 44-2). 131I-labeled anticalcitonin IgG was taken up by the tumors in a time-dependent and dose-dependent manner. Tumor tissue uptake of the injected MoAb was 0.7 to 1.3%/g of tumor tissue when tested with a dose range of 40 lo 250 μg/kg of body weight. Distribution ratios of the radiolabeled MoAb were 1.2:1 for tumor-to-blood and 2-20:1 for tumor-to-organs. In rats injected with control IgG, disiribution ratios of radioactivity were 0.4:1 for tumor-to-blood, and 0.6-2:1 for tumor-to-organs. These results suggested …
Studies Of Multiple Endocrine Neoplasia Type 2a Syndrome: Linkage Analyses And Comparison Of Constitutional And Tumor Genotypes, Hideo Tateishi, Shin-Ichiro Takai, Isamu Nishisho, Tetsuro Miki, Kazuyoshi Motomura, Makoto Okazaki, Akira Miyauchi, Tatsuro Ikeuchi, Kohtaro Yamamoto, Tatsuo Hattori, Yuichi Kumahara, Hideo Matsumoto, Tasuko Honjo, Takesada Mori
Studies Of Multiple Endocrine Neoplasia Type 2a Syndrome: Linkage Analyses And Comparison Of Constitutional And Tumor Genotypes, Hideo Tateishi, Shin-Ichiro Takai, Isamu Nishisho, Tetsuro Miki, Kazuyoshi Motomura, Makoto Okazaki, Akira Miyauchi, Tatsuro Ikeuchi, Kohtaro Yamamoto, Tatsuo Hattori, Yuichi Kumahara, Hideo Matsumoto, Tasuko Honjo, Takesada Mori
Henry Ford Hospital Medical Journal
Linkage analyses were carried out in nine Japanese kindreds with multiple endocrine neoplasia type 2A (MEN-2A) using polymorphic classical markers and DNA markers. We excluded close linkage of the MEN-2A gene (MEN2A) locus with Gm, JK, PGMl, and a DNA segment, D20S5, which is assigned to band 12 of the short arm of chromosome 20 (20p12.2). Assuming that MEN2A is recessive at the cellular level as in retinoblastoma (RB) and Wilms' tumor (WT). comparison of constitutional and tumor genotypes may be useful in the search for the MEN2A locus. When DNA samples from 12 patients with medullary thyroid carcinoma (MTC) …