4351
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Li S. [Mottled enamel caused by the polluted air due to burning coal in the room]. ZHONGHUA KOU QIANG KE ZA ZHI [CHINESE JOURNAL OF STOMATOLOGY] 1983; 18:114-6. [PMID: 6580115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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4352
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Takahashi A, Li S, Horie K, Okamura H, Aso T. [Stress and neuroendocrinology--the effect of stress on serum LH, FSH and Prl levels]. NIHON RINSHO. JAPANESE JOURNAL OF CLINICAL MEDICINE 1983; 41:1015-20. [PMID: 6415320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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4353
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Li S, Pathak S. Karyological analysis of N-methyl-N'-nitro-N-nitrosoguanidine-transformed Syrian hamster cell lines using high resolution G-banding technique. Anticancer Res 1983; 3:117-20. [PMID: 6847129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The karyotypes of two Syrian hamster cell lines transformed by N-methyl-N'-nitro-N-nitrosoguanidine have been analyzed using high resolution G-banding technique. The change of gene dosage appears to be the main feature of the chromosome aberrations. One of the cell lines (BHLB4) has been passaged in vitro for 68 times and has a pseudodiploid chromosome number of 44. The most common feature of aberrations of this cell line is monosomy of chromosome 15 and in addition trisomy of chromosome 8. The other cell line (HEC5) was newly transformed, having a modal chromosome number of 50. In spite of the occurrence of trisomy of some autosomes, monosomy of chromosome 15 was still evident. No obvious structural changes were found even in G-banded prophase chromosomes. Our observations support the previous report on the monosomy of chromosome 15, as the most common feature of virally- and chemically-transformed Syrian hamster cell lines.
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4354
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Li S, Meistrich ML, Brock WA, Hsu TC, Kuo MT. Isolation and preliminary characterization of the synaptonemal complex from rat pachytene spermatocytes. Exp Cell Res 1983; 144:63-72. [PMID: 6840213 DOI: 10.1016/0014-4827(83)90442-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A method for preparation of the morphologically intact synaptonemal complex from rat pachytene spermatocytes is described. Pachytene spermatocytes were fractionated from rat testicular cells by centrifugal elutriation. Nuclei from fractionated pachytene cells were prepared and extensively digested with micrococcal nuclease. The digested nuclei were sedimented through 20% (w/v) sucrose containing 2 M NaCl by centrifugation. About 10% of total nuclear proteins and 1-2% of total genomic DNA was found to be associated with the residual structure. The residual structure, which contains mainly the synaptonemal complex, but may be still contaminated with other nuclear components including membrane and matrix, was stained with silver and examined under light microscopy. It was found that a silver-staining component of the synaptonemal complex is not grossly different from that in pachytene nuclei not subjected to digestion and extraction. Sodium dodecyl sulfate (SDS)-polyacrylamide gel electrophoresis revealed that virtually all the proteins in the residual structure are non-histones. The DNA isolated from the residual structure was about 135 base pairs (bp), long. The DNA was end-labeled and hybridized with a large excess of sonicated rat genomic DNA. The hybridization displayed a kinetics virtually identical to that of total nuclear DNA. We also prepared restricted DNA fragments associated with the residual structure. Southern blot analyses using a probe made from a recombinant DNA clone containing the albumin gene revealed that the DNA associated with the residual structure was not enriched (or depleted) in this gene sequence. Our results strongly suggest that (1) the synaptomenal complex may play a structural role to support the chromatin domains inside pachytene nucleus; and (2) a simple common DNA sequence in the chromatin domain is not required for association with the residual structure which contains morphologically intact synaptonemal complex in rat spermatocytes.
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4355
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Wang Z, Li S. [A preliminary study on the gene expression of aldolase isozymes and chromatin composition and transcription in Ehrlich ascites tumor and the host liver]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1982; 4:277-81. [PMID: 6219761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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4356
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Li S, Au WW, Schmoyer RL, Hsu TC. Baseline and mitomycin-C-induced sister chromatic exchanges ina melanoma and a colon tumor cell line. CANCER GENETICS AND CYTOGENETICS 1982; 6:243-8. [PMID: 6811127 DOI: 10.1016/0165-4608(82)90062-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Baseline and mitomycin C (MMC)-induced sister chromatid exchanges (SCEs) in two human tumor cell lines (a colon tumor and a melanoma) and in a normal fibroblast cell line were analyzed and compared. The tumor cells showed numerical and structural chromosomal abnormalities. Their baseline SCE rate was slightly, but not significantly, higher than that of the control. Each tumor cell line showed a dose-dependent increase in SCE frequency above the spontaneous level in its own specific manner. The response in the malanoma cell was consistently below that of the control, but only the response to the highest dose of MMC (10(-9) M) was significantly lower than that of the control. The response of the colon tumor cells varied with respect to that of the control. Thus, it appears that karyotypic instability in tumor cells is not necessarily associated with elevated baseline or induced SCE/chromosome rates. In addition, within each cell line dose group, the SCE frequency was proportional to the number of chromosomes. thus, the SCE/chromosome is a better expression of genetic damage than SCE/metaphase in analyses involving heteroploid cells.
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4357
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Li S, Fan MC, Li SS, Liu Y, Wang MS. [Studies on the mechanism of carcinogenesis. V. Differential changes in activities of enzymes involved in ornithine metabolism in early phase of hepatocarcinogenesis induced by diethylnitrosamine]. ZHONGGUO YI XUE KE XUE YUAN XUE BAO. ACTA ACADEMIAE MEDICINAE SINICAE 1982; 4:141-6. [PMID: 6215136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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4358
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Yoshimasa T, Nakao K, Ohtsuki H, Li S, Imura H. Methionine-enkephalin and leucine-enkephalin in human sympathoadrenal system and pheochromocytoma. J Clin Invest 1982; 69:643-50. [PMID: 7061706 PMCID: PMC371021 DOI: 10.1172/jci110491] [Citation(s) in RCA: 38] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
To elucidate the physiological and pathophysiological significance of methionine- and leucine-enkephalin (Met-and Leu-enkephalin, respectively) in human sympathoadrenal system, the contents of these peptides in normal human sympathetic nervous system, adrenal medulla, and pheochromocytomas were determined by specific radioimmunoassays combined with reverse-phase high-performance liquid chromatography. Met-enkephalin-LI and Leu-enkephalin-LI, respectively) were detected by radioimmunoassay in adrenal glands, adrenal medulla, stellate ganglia, sympathetic trunks, and celiac ganglia, and their contents in adrenal medulla were highest. Existence of authentic Met- and Leu-enkephalin was confirmed by reverse-phase high-performance liquid chromatography. Met-enkephalin was approximately 74% of Met-enkephalin-LI, whereas Leu-enkephalin was approximately 30% of Leu-enkephalin-LI in human adrenal medulla. The ratio of Met- to Leu-enkephalin was 2.6 in human adrenal medulla, whereas it was higher in sympathetic ganglia or trunks. In four cases of pheochromocytoma marked difference in Met- and Leu-enkephalin contents was found between medullary and extramedullary tumors. The contents were about three orders higher and the Met- to Leu-enkephalin ratio was lower in medullary than in extramedullary pheochromocytomas, reflecting the tissues where the tumors arose. These results suggest the physiological roles of Met- and Leu-enkephalin in sympathetic nervous system and adrenal glands and their pathophysiological significances in pheochromocytomas.
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4359
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Li S, Pathak S, Hsu TC. High resolution G-banding patterns of Syrian hamster chromosomes. CYTOGENETICS AND CELL GENETICS 1982; 33:295-302. [PMID: 7172760 DOI: 10.1159/000131775] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The late prophase, prometaphase, early metaphase, and metaphase chromosomes of Syrian hamster embryo fibroblast cells were G-banded using a technique combining actinomycin D pretreatment and Wright/Giemsa staining. Late prophase chromosomes have approximately twice as many bands as metaphase chromosomes, whereas prometaphase and early metaphase chromosomes have intermediate numbers of bands. An idiogram for metaphase and late prophase chromosomes is presented, and a nomenclatural system for identifying individual bands of Syrian hamster chromosomes is proposed.
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4360
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Chen G, Jiang C, Li S, Yang B, Jang D, Wang P, Yan J, He L. The role of the human caudate nucleus in acupuncture analgesia. ACUPUNCTURE ELECTRO 1982; 7:255-65. [PMID: 6131570 DOI: 10.3727/036012982816952053] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The role of the caudate nucleus in acupuncture analgesia was studied in 17 patients receiving caudate stimulation through chronic implanted electrodes to relieve intractable pain caused by late malignancy. Electrical stimulation of the head of the caudate nucleus provided relief from intractable pain in all 17 patients. The pain and pain tolerance threshold were elevated, the alteration in skin galvanic activity, respiratory movement and fingertip plethysmography elicited by a given painful stimulus were depressed. The analgesia required a period of induction and persisted for some time after cessation of stimulation; it showed no obvious segmental topography. These characteristics are similar to those observed in acupuncture analgesia. The effect of caudate stimulation was similar to that of electric needling in depressing the late component of the somatosensory evoked potentials (SEPs) recorded over the scalp and from the centrum medianum of the thalamus. Evoked potentials could be recorded from the caudate nucleus when an acupuncture point was electrically stimulated. The evoked potential record was a complex wave of positive and negative components, the peak latencies of main components being 100-180 msec for positive wave and 148-332 msec for negative wave components. The present study supports the supposition that the caudate nucleus may play a role in acupuncture analgesia. The possibility that the effect of caudate stimulation is brought on by inhibiting the activity of the medial thalamus is discussed.
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4361
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Song R, Gao X, Li S, Zuo Z. Surgical treatment of lymphedema of the lower extremity. Clin Plast Surg 1982; 9:113-7. [PMID: 7047045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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4362
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Misaki T, Dodo Y, Harioka T, Li S, Nakano Y, Torizuka K, Shimamura S, Furuta K. [Computed tomography of gravitation abscesses (report of a case) (author's transl)]. RINSHO HOSHASEN. CLINICAL RADIOGRAPHY 1981; 26:1351-3. [PMID: 7321252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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4363
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Zweben A, Li S. The efficacy of role induction in preventing early dropout from outpatient treatment of drug dependency. THE AMERICAN JOURNAL OF DRUG AND ALCOHOL ABUSE 1981; 8:171-83. [PMID: 7331974 DOI: 10.3109/00952998108999123] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A study was conducted to examine the impact of various role induction modalities in dealing with the problem of early dropout among substance abusing patients. Emphasis was placed on tracing the interdependency between patient misperceptions of treatment, termed level of discrepancy in treatment expectations (Level of DTE) and continuance. Results indicated that patients who were more favorably disposed to the program (low Level of DTE) were more likely to remain in care than those who were not (high Level of DTE) only if role induction was provided; in the absence of the pretreatment intervention, differences between high and low discrepant patients were virtually nonexistent. These data suggest that the real utility of role induction lies in its ability to confirm the expectations of low discrepant patients (in contrast to improving patient knowledge of therapy) while at the same time providing them with a mechanism to learn coping skills necessary for adjusting to a new program. For those classified as high discrepant patients, role induction alone was not sufficient to prevent early termination; the majority did not stay past four sessions. Implications for this group are that greater efforts should be made in responding to their concrete problems, actively engaging "significant other(s)" or providing them with an external support system in the form of a "buddy" at the point of entry, in order to forestall premature termination.
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4364
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Shepro D, Li S, Hechtman HB. Plasminogen activator activity of isolated cardiac muscle microvessel endothelial cells. Thromb Res 1980; 18:609-16. [PMID: 6774440 DOI: 10.1016/0049-3848(80)90215-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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4365
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Li S. [Population problems and theories in old China]. SICHUAN DA XUE XUE BAO = SICHUANDAXUE XUEBAO 1980:63-9. [PMID: 12178294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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4366
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Yang ZB, Li S. [Treatment with maintenance dose of digoxin; an analysis of 102 cases]. ZHONGHUA XIN XUE GUAN BING ZA ZHI 1980; 8:20-2. [PMID: 7449612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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4367
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Malbon CC, Li S, Fain JN. Hormonal activation of glycogen phosphorylase in hepatocytes from hypothyroid rats. J Biol Chem 1978; 253:8820-5. [PMID: 721817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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4368
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Yoshikawa K, Wada N, Li S, Yamamoto Y, Tomii H. [Studies of insulin determination by enzyme immunoassay. 2--factors affecting the test procedures]. HORUMON TO RINSHO. CLINICAL ENDOCRINOLOGY 1978; 26:693-8. [PMID: 352579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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4369
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Yoshikawa K, Wada N, Li S, Yamamoto Y, Tomii H. [Insulin determination with enzyme immunoassay (1)--with special reference to comparison with radioimmunoassay]. HORUMON TO RINSHO. CLINICAL ENDOCRINOLOGY 1978; 26:615-20. [PMID: 357048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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4370
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Chien S, Weinburg R, Li S, Li Y. Endo-beta-N-acetylglucosaminidase from fig latex. Biochem Biophys Res Commun 1976; 76:317-23. [PMID: 1027432 DOI: 10.1016/0006-291x(77)90727-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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4371
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4372
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Spector A, Li S, Sigelman J. Age-dependent changes in the molecular size of human lens proteins and their relationship to light scatter. INVESTIGATIVE OPHTHALMOLOGY 1974; 13:795-8. [PMID: 4411898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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4373
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Katz EP, Li S. The molecular packing of collagen in mineralized and non-mineralized tissues. Biochem Biophys Res Commun 1972; 46:1368-73. [PMID: 5012172 DOI: 10.1016/s0006-291x(72)80126-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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4374
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Li S, Arai J, Matsuki S, Asano S, Nishikawa T. [A case of nephrotic syndrome associated with cryptococcal meningitis]. NIHON NAIKA GAKKAI ZASSHI. THE JOURNAL OF THE JAPANESE SOCIETY OF INTERNAL MEDICINE 1970; 59:623-7. [PMID: 5466018 DOI: 10.2169/naika.59.623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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