Jump to:

RJ Reynolds

International Cancer Congress, Budapest, Aug. 21-27, 1986 (860821-860827).

Date: 22 Oct 1986
Length: 20 pages
505502211-505502230
Jump To Images
snapshot_rjr 505502211-505502230

Fields

Type
LETTER
Referenced Document
Risk of Lung Cancer From Passive Smoking, by Doll R. Penetration of A Tobacco Carcinogen Across Oral Mucosa in the Presence of Ethanol, by Squier Ca. Smoking or Health: the Role of Cancer Societies. Current Aspects of Cancer Epidemiology. Effects of Cigar
Copied
Hayes, J.
I Wdh
I Scs
I Hcm
Burger
I, D.D.
Recipient
Gertenbach, R.F.
Date Loaded
27 Feb 1998
Request
Mangini
Court
Order
19960800
1rfp48
1rfp53
4rfp9
Minnesota
1rfp93
Falise
1rfp1
Rogers
Cordova
1rfp29
Texas
Initial
Disclosure
Box
Rjr2148
Characteristic
Marginalia
Site
R&D
Biochem Biobehavioral
Hayes Aw
Group Dir
Named Person
Ussr Academy, O.F. Medical Sciences
Acs
Nci
Nih
Ti
Intl Cancer Congress
Intl Union Against Cancer
Eckhardt, S.
Mirand, E.
Roswell Park Memorial Institute
Assn, O.F. American Cancer Institutes
Doll, R.
Gray, N.
Hirayama, T.
Japans Natl Cancer Center
Radio Free Europe
Adams, L.
Chermann, J.C.
Pasteur Institute
Gallo, R.
Peto, R.
Radcliffe Infirmary
Trichopoulos, D.
Peto, J.
Institute, O.F. Cancer Research
Schuller, H.
Univ, O.F. Tn
Univ, O.F. Saskatchewan
Klaassen, D.J.
Grafstrom, R.
Stockholms Karolinska Institute
Harris, C.
Hardell, L.
Univ Hospital
Univ, O.F. Ia
American Helath Foundation
Rivenson, A.
Hoffman, D.
Hecht, S.
Mitsukaido Laboratories
Auerbach, O.
Garfinkel, L.
Veterans Administration Medical Cen
Kunze, M.
Univ, O.F. Vienna
Muir, C.
Heald, D.E.
Intl, A.G. For Research, O.N. Cancer
Gadberry, G.R.
Simpson, D.
Britains Action, O.N. Smoking & Health
Bjartveit, K.
Adenis, L.
Stjernsward, J.
Who
Centre Oscar Lambret
Stanley, K.
Univ, O.F. Bergen
Kvale, G.
Heuch, I.
Mackay, J.
Hong Kong Anticancer Society
Erickson, A.
Institute, O.F. Preventive Oncology
Jedrychowski, W.A.
Axelson, A.
Ryser, H.
Boston Univ
Band, P.
Cancer Control, A.G.
Maltoni, C.
Institute, O.F. Oncology
Vainio, H.
Barrett, J.C.
Zurhausen, H.
West German Cancer Research Center
Aoki, K.
Nagoya Univ
Fischinger, P.
Pershagen, G.
Natl Institute, O.F. Environmental, M.E.
Heinrich, U.
Mohr, U.
Fraunhofer Institute For Toxicolog
Cookfair, D.
St Univ, O.F. Ny
Schmidt, C.G.
Univ, O.F. Essen
West German Tumor Center
Clark, R.L.
Univ, O.F. Tx
Reagan
Gorbachev
Wyngaarden, J.
Blokhin, N.
Author
Zahn, H.
Zahn, L.
Leonard Zahn & Assoc
UCSF Legacy ID
yto15d00

Document Images

Text Control

Highlight Text:

OCR Text Alignment:

Image Control

Image Rotation:

Image Size:

Page 1: yto15d00 Log in for more options!
SUBJECT: International Cancer Congress, Budapest, Aug. 21-27, 1986 The logistics of the'congress were like M.urphy's Law -- any- thing that could go wrong did. Not even th-e scientific part could help -- that was generally old-hat.. "A-disaster" was the brief (and private) description of the'meeting by a Canadian researcher who represents his country in international cancer matters. He was right on target. Comedy or disaster, or both, the quadrennial meeting of the International Union Against Cancer (UICC,. which is headquartered in Geneva, Switzerland) played to a full house of about 8,000 attendees from 82:-countries and, for the first time, featured a series of international satellite telecasts. A fairly large press contingent, predominantly European and mostly Hungarian, was present to report the event. Several Italian newsmen came because a pharmaceutical company in their homeland had paid their way; the company sponsored a session on an anticancer drug it had de- veloped and also subsidized the congress's daily news letter, a four-page publication that blatantly promoted the company's prod- ucts and also had several antismoking stories during the week. Other writers seemed to have similar benefactors. The subject of smoking and health arose early and often:_even before the official opening ceremony, congress secretary-general SANDOR ECKHARDT of Budapest referred to it during the first of many press conferences. He noted in part that in countries such as Norway and Scotland, where there are strong antismoking cam- paigns, the incidence of lung cancer is beginning to fall. : There were two press offices and one room for press conferen- ces. One, for English-speaking writers, was under the direction of EDWARD MIRAND of Roswell Park Memorial Institute, Buffalo, NY, secretary-general of the 1982 cancer congress and now secretary- treasurer of the Association.of American Cancer Institutes. The ,. .. ... other was directed by 'a Hungarian-'and '='Was,-_-.for-press .- people from Iron'Curtain countries; -the_Hungarian'nominallyYWas in charge of the entire-press'operation;"but virtually all =t~ie-maferial -- and available to'~the -pr _.ess°-came _ ....~fi~o _.__m.~ interviewees -- avail` ' Mirand's -sector. Major. news_ attention":to_".s~inokiing_'and"-;`'cancer ;;developed• early in the meeting because of°-a -press releasethat"_•cited some selected commen,ts from a paper._by -Sir'RICHARD'DOI.L: -on` risks _'of active and passive smoke exposure; stories`, appe.ared,°-in _~many newspapers in a number-of west European nations. As the ~meeting''-,progressed, the eona ahn PUBLIC RELATIONS COUNSEI andamdatmhwa P ; .• ... 0 *13 LINCOLN ROAD •P.O. BOX 223 •GREAT NECK. N.Y. 11022 •(516)452-5715
Page 2: yto15d00 Log in for more options!
2. .3 • + y media people were exposed to other well-known antitobacco acti- • vists from around e the world, several of whom were invited to the r~.. press room foi~`-interviews. They included NIGEL GRAY of Melbourne, Australia, and TAKESHI HIRAYAMA from Tokyo, where he formerly was the chief epidemiologist at Japan's National Cancer Center. Doll was videotaped for an international television broadcast. A few writ r attended ll i t rt ~' oki A e s ac ua y . some sess ons on sm er repo ng. for Radio Free Europe, based in London,"-flew-in for two days of coverage; his first, and biggest, story was on smoking and can- cer. The medical, writer for a Houston: paper was there and she also.filed at least two stories.on smoking. The program contained several sessions dealing specifically with various aspects of smoking, including cessation and anti- smoking legislation. Additionally, numerous presentations on the subject were:scheduled for various other sessions. Most of the material was familiar and so were many of the speakers. One pre- , sentation, by a United States scientist,.,was different, if not new; it was ignored or overlooked by the press. (See item No. 2 below.) ~ Many top American Cancer Society (ACS) officers were in Buda- pest and participated in various sessions dealing with smoking. None was a scientist. LANE ADAMS, who recently retired after many years as the society's executive vice president, gave.a plenary lecture. The ACS also had an exhibit with an antismoking theme. The congress site was an old exposition area several miles f rom downtown Budapest. It consisted of a number of utilitarian buildings, many of them seemingly large enough to-contain several football fields each, constructed in helter-skelter fashion on several acres of land. None of the buildings was air conditioned. Meeting rooms in many of the structures had only partial walls -- a speaker in one "room" was heard next door and down the line. In buildings where there were full walls, there were no public ad- dress systems in the rooms, and only a-few rooms had individual' radio receivers. Slide projectors and other equipment were some-;' what less than modern. Many speakers and listeners had a diffi- cult and frustrating time. (This despite the fact that Hungary received more than the normal amount of financial support, espe- cially _ _ cially from the U.S.) ffici l na • a Top UICC o l program s-from the U.S.-didn t see the fi until they arrived in Budapest for the congress. This document i tak , s i . s i th g,` s es -had numerous m om er ,.ag- , ome_amus ssions; etc n o .gravating to affected participants."For."example,:paper No..1098 on the program was followed by No.,5045, then No. 4950; this was a common occurrence.y,Some,numbers were omitted entirely. Discov- ering when: and where'certain papers were being. given became an ering ~ adventure at times. The problem was compounded by-the fact that o the speakers were listed-in a separate document -which also had ~, , numerous errors., _P •_ .'''.. ~> .'l. . ... .3: . u-:. 0 Several prominent cancer -researchers commented privately_..",on. ~ ^' the overall poor scientific quality of the program and vowed that ., 0 4 N ~~ . . .
Page 3: yto15d00 Log in for more options!
.:f . 3: the level would be considerably higher at the 1990 congress (in Hamburg, West Germany). However, there were some informative and interesting presentations during the meeting• that included 18 major lectures, 4 special and 12 plenary lectures, 82 symposia, 79 round-table conferences, 5 audiovisual sessions, 190 poster discussions, and more than 4,200 individual poster presentations. Unfortunately, some rather awful material crept in, especially in the-poster sessions. Apparently not all, the sessions had been ref- ereedi, One of the most important scientific reports of the congress came at a session on AIDS (this seemed to attract the biggest turnout of the congress): JEAN-CLAUDE CHERMANN of the Pasteur Institute in Paris disclosed he'd found the AIDS virus present in mosquitoes and certain other blood-sucking insects in Africa. ROBERT GALLO, a leading AIDS researcher at the U.S. National Cancer Institute, questioned the significance of the finding. (Later, and privately, he said he'd been "shafted" by the Frenchman.) For the first time at such congresses, significant attention was paid to the subject of cancer nursing. Indeed, 100 U.S. nur- ses were at the meeting as the result of a grant. There also were the expected sessions on oncogenes (and antioncogenes), immunol- ogy, environmental carcinogens, and cancer therapy (mostly animal work reported by U.S. scientists; human chemotherapy studies of great variety and number reported by Japanese and Italian inves-• tigators). And so on. The highlights: the the Imperial Cancer Research Fund Unit at Radcliffe Infirmary in Oxford, U.K. Doll got considerable new.s attention in several European na- tions because of a press release, headlined "Risk of Lung Cancer From Passive Smoking," citing his claim"that "up to-half the lung cancer deaths among nonsmokers may be-due to passive smoking. The quotation; if not-.a-little 'inaccurate,~7rtas at.least-incom- plete. Doll -had a summary`ofy data' from-'=,-10 ."` studies (in the U.S., Japan, Greece, Hong Kong,_ and the U.K.) on the-'risk,of_.lung can- cer in nonsmokers by-their spouse's smoking habits. Here's what L" 0 ~ he actually wrote: ~ f.- _. . .r . - *'1 `- .. . . , .. . ... ... . ,r _... . . . . .., ., . . , . . . . . ;. _ 0 1. Doll was a busy participant. He was scheduled to give the same paper at twQ.different sessions (morning and afternoon) on the same day. He literally halved the paper, which dealt with the risks of active and passive smoking, and had a different title"'. for each session). The previous day he delivered- a paper by the' (temporarily) absent RICHARD PETO, his protege and colleague at (of.the studies)--are.consistent with an "The great majority increase in risk, when,..the'-spouse smokes,, " ; of 20. to. 50x. I t need not be assumed,-however, that the-risk is the-same in;all,coun- tries, as differences in culture and in housing may well affect .., .. ~ .
Page 4: yto15d00 Log in for more options!
_ 4. _ , - L the relative amounts of smoke to which a person is involuntarily exposed by the habits or his or her spouse. Nor can it be assumed that the estimated risks are real, as they depend on the accuracy of smoking histories,and it is possible that self-reported non- smokers -have, in fact, smoked actively to a small extent that is correlated with their spouses' habits unless they have been in- terrogated in much greater detail than they commonly are. If, however, the risks are real, they :can constitute only a-fraction of the total risk as all nonsmokers, whether married to smokers or not, must be exposed involuntarily to:'smoke from other sour- ces. A third test, namely examination of the:trend in incidence in nonsmokers is doomed to -failure as*the rarity of lung cancer in nonsmokers will ensure that measurements of its incidence are too imprecise for changes of a likely size to be detected. "I conclude, therefore, that exposure to tobacco smoke in the ambient atmosphere must be assumed __ to____ cause._. some risk of_ lung cancer, but that the -size of the risk is-uncertain. It may, how- ever, be large enough to account for up to 50% of the risk of lung cancer that i-s-actually observed in nonsmokers." f r In the same paper, but not cited in the press release or, so far as is known, in press stories, Doll discussed a recent review that claimed various animal carcinogens exist in tobacco smoke. He continued: "Unfortunately, it is impossible to estimate the risk that these ambient chemicals may induce, partly because we do not know which of the chemicals in tobacco smoke is respon- - sible for its carcinogenic effect in active smokers and partly because the_ physical state_of__the__various chem.i_cals_-___and_ their _ _ distribution within the respiratory tract is (sic) different when they are inspired actively and passively." - - Doll discussed passive smoke exposure at a morning session that purportedly was to deal with the role of cancer societies in. smoking and health. He was-cochair and lead-off speaker at an af-.. ternoon session on "Analytic Epidemiology!'__ that had a talk on -- passive smoking by DIMITRI TRICHOPOULOS of Athens. He'd leave that topic to Trichopoulos, he said, and would talk about other things, such as the effect of changing cigarette consumption pat- erns and lung cancer mortality trendsn in different countries. (Trichopoulos said nothing new.)> The mean tar delivery in many nations.,is now less than half what it was in the 1950s, he said, but.the-effect on..risk reduc- -- .-_---_---_ ------ tion is is unclear. Lung- cancer mortality rates at-young ages, 35-44 years, have risen in seven countries (Czechoslovakia +17%, France +23%, West Germany +22%, Hungary. +43%,.Italy +7%, Japan +15%, Poland +12%) and fallen-:in five_'-(Australia -15%,. England and Wales -35%, Hong Kong -45%,, The Netherlands -53%, U.S. -32%). In the 65-74-year bracket, there were slight reductions in Hungary and Czechoslovakia, but increases in the other 10 coun- tries, with the highest being in Italy (+44%), Japan (+36%), Hong Kong (+34%), Poland (+32%), and France (+-28%). r., 0 0 w .;
Page 5: yto15d00 Log in for more options!
, In England, Doll said, the reduction in lung cancer deaths in younger aged men probably was due to lower tar yields, not to lower cigarette consumption. "Differences in the trends in tar delivery are, I suspect, major contributors to the differences between the two groups of countries," he said. "Certainly, there has been very much less reduction in Czechoslovakia, Hungary and Poland, where the average delivery has remained above 20 milli- grams (mg), and in France, where it remained above 20 mg until recently, than there has been in Australia, England and Wales, and the U.S.A." (The above figures are for men, Doll said, but broadly similar trends exist for women.) (Doll and JULIAN PETO, Institute -of Cancer Research, Sutton, UK, have written an editorial in the October issue of the "Bri- tish Journal of Cancer" in which they say that the evidence sup- porting an association between passive smoking and lung cancer is consistent with an increased risk of 20-30%.) . 2. In an aftei^noon session on the last day of the meeting, HILDEGARD SCHULLER- of the University of Tennessee in Knoxville offered a theory as to how cigarette smoking may induce small cel l 1 ung cancer ( SCLC ): 'The carbon monoxide ( CO ) in -the . smoke -+. creates an oxygen..imbalance in the lung that.leads.to an,.-influx . of endocrine cells, which.rarely are,found:,.in.the,lung. Nitr.osa= ; mines in the-smoke activate the endocrine cells,.;reactive metabo= Glites are::;formed ,, and the- • cells';.eventual.ly,.,ar,e,,.:..tra,n,sf..o.rmed into":,, t$C.[.C-- a Schuller said she developed her theory after experiments in which she used#nitrosodiethylamine -°(DEN),~ a tobacco carcinogen,4 in various human lung cancer cell lines and in hamsters. She was withholding details, she said, because the work is to appear soon in "Cancer-Research." (She's previously reported data saying~'.DEN"#' given to hamsters. induced-,pulmonary adenocarcinomas derived,;fromt;' C1'a"ra-ce11s.;She's been using this model for several years.) , In the hamster part of her work, the animals were given DEN and exposed to CO in an oxygen chamber. All the animals died in about 8 weeks. Their lungs had "lots of tumors" as well as hemor- rhages; the tumors were composed of pulmonary endocrine cells. At the outset, Schuller said that aidous'•,~4~ce11~ . . . _. w . ,.. ..,, -,,-. . _, ... r. . . ~ano'.er~.~:atidN>SCLG,,"t`were=-.ths~'wmost~.~~QAu'ep~~:tYpea~,,o~~'"liup~~:'rCancer,~ in:~ r .•c } t he U':S, ~zY S~nG:e ~ t.hP n,~'~: hp$4.bStg C'pulmooerYX ;~ad~no9 ~F;ctnomas ; ,hav"e become# the most ~T.fr.equent~,.typipkpf.~_0 lyng'3;mal~gnan,cy;~ M okers;y~;she •~ .. . Esai,,dy5 ;~thile ,sq~amous:': Garlcer:o l~as~.;d.eCr.erased~iny incid,ence;~ ~'a,hd~'SCLCeti, Ehas,recn~ined ,.at~+:i^about~t,he,~.sameslevel;..~Later, .an1it~gdthat ' . , .. ~ +s .Y +M M w, . . ~~LC~,was~ ~rare~in, kiuinans"~'arid~~irik~c~omestio4;and~experimental-animal`s. Schuller is planning further experiments in which the levels of CO and oxygen to which the DEN-treated hamsters are exposed can be adjusted so as to control the influx of pulmonary endo- crine cells. She wants to give the animals SCLC and keep them ,
Page 6: yto15d00 Log in for more options!
~. -. .. 6. , I alive to see if metastases develop. She worries "a great deal" about the so-called "safe" ciga- rettes, Schuller said, because smokers compensate by smoking more of them. While these cigarettes have lower levels of polycyclic aromatic hydrocarbons, they still contain carcinogenic nitrosa- mines. 3. Lung cancer in females may be more dependent on endogenous factors than is lung cancer in males, according to a hypothesis advanced by scientists at the University of Saskatchewan in-Sas- katoon, Canada. Data from questionnaires answered by 927 lung cancer patients (742 males, 233 females) or their relatives and from the local tumor registry, persuaded D.J. KLAASSEN and colleagues to theorize that females may be more susceptible to the hazards of smoking than men. A poster report noted that females were diagnosed at an earli- er mean age than were men, a finding consistent for each major histologic type ofg lung cancer. Of the females, 42% were diag- nosed before age 60; the figure for males was 25.6%. Female patients were significantly more likely to be nonsmok- ers than were male patients. Among current smokers, the females began smoking at an older age, and smoked fewer years and fewer cigarettes daily than did male patients. The females had more lung adenocarcinomas and fewer squamous cell lung cancers than did the males. Very few female patients were exposed to known or suspected carcinogens or pulmonary ir- ritants at work or elsewhere. 4. ROLAND GRAFSTROM of Stockholm's Karolinska Institute repor- ted that aldehydes in tobacco smoke caused various cytotoxic and genotoxic effects in cultures of human bronchial epithelial cells (HBE) and fibroblasts. Of the aldehydes tested, ~;ae,rolein' was the most cytotoxic in regard to HBE survival and also had potent adverse effects on fibroblasts. Generally speaking, the experiments undertaken by Grafstrom and others (a coauthor was CURTIS HARRIS, National Cancer Insti- tute, Bethesda, MD) showed a variety of adverse reactions induced by the aldehydes tested. These included genotoxic endpoints such as mutations, DNA single strand breaks, DNA protein crosslinks, DNA interstrand breaks, and inhibition of DNA repair. Many of the effects were qualitatively and quantitatively similar in cells derived from human bronchus, buccal mucosa or skin. ` _ The results, Grafstrom said, show (t.~'tb~a~cc~o'~*sinoke:dza'I`dehyde r y' ._h.~ ~e~cer~`~a+.Var~.e,t ofi:eff6ct~sr;,"t`tiat'- relate:r to,;;mGlti.s_tagq,,Cari,cinogen=,j .•
Page 7: yto15d00 Log in for more options!
esis in HBE. He noted that aldehydes also occur in vehicular exhaust and in various occupational sources. 5. Richard Peto, in the talk given for him by Doll, cast_part of his comments in the form of advice to Britain's national health authorities -on how to reduce smoking in England. A good part of the paper was a repeat of material from the lengthy re- port he and _Doll wrote several years ago, primarily"on the U.S. situation. _ Smoking is the "overwhelming" factor in human cancer, he said, and causes about one-third of all cancer deaths in the U.K. and the U.S. The figure for the European Economic Community is 25% and "rising fast." Next in importance is alcohol, which is re- sponsible for about 3% of all deaths. Smoking causes additional deaths as a result of heart disease and lung ailments. Priorities should be established for decreasing the hazards in cigarettes and reducing cigarette consumption. The authorities must make adults "confidently" aware of the risk of smoking: about one-fourth of smokers will die six years earlier than they would die if they didn't smoke. There's almost nothing else that is "remotely comparable" in importance to the smoking problem. Peto decried media coverage of "minor" pollutants, saying it detracts from public attention to true cancer-causing agents such as cigarette smoke. New chemicals are being introduced but are being properly controlled. Also, news reports about significant findings from experimental cancer research lead the public to think that smoking is just one of many causes of the disease. As for diet, there's no conclusive evidence regarding nutri- tion and cancer. The protective or preventive effect of vitamins is not supported by valid studies. Many current dietary recommen- dations are based on incomplete data. Nutrition fads should be avoided. (At this session, L. HARDELL of University Hospital in Umea, Sweden, gave a paper in which he discussed various environmental carcinogens, among them dioxin ("Agent Orange"). He accused Doll of "selling out" for having said, apparently recently, that diox- in was not harmful. Doll did not respond.) , 6. "Penetration of a tobacco carcinogen across oral mucosa in the presence of ethanol" was the title of a poster presentation by C.A. SQUIER, University of Iowa, Iowa City. It claimed there was evidence for a synergistic effect between tobacco and alcohol in the_development of oral cancer, but that the reason for the effect was unclear. A po'ssible explanation is that alcohol en- hances the penetration of carcinogens across the oral tissue. v = .V r, h . To study this possibility, measurements were made of the per- meability of porcine oral mucosa to a tobacco-derived carcinogen,
Page 8: yto15d00 Log in for more options!
8. nitrosonornicotine (NNN), in the presence of 5% or 50% alcohol. Three regions of oral tissue were used -- gingiva, floor of mouth and buccal cavity; they represented 83 specimens from 16 pigs. Radiolabeled NNN was used in a solution that contained nicotine; the concentrations approximated those found at the mucosal surface of a tobacco user. - - The penetration of NNN across oral mucosa was found not to be significantly changed in the presence of 50% alcohol. However, there was a significant increase in the permeability of gingiva and floor of mouth mucosa, but not buccal mucosa, in the presence of 5% alcohol. This increase occurred after far shorter exposures (1-2 hours) for floor of mouth mucosa than for gingiva• (12-20 hours). The findings suggest that 5% alcohol may act as a vehicle for the transport of tobacco carcinogens across oral mucosa. The findings are in accord with epidemiologic studies showing that the floor of the mou.th is a high risk area for oral cancer.and that there is an increased relative risk of oral cancer for heavy smokers and drinkers. The latter statement applies particularly to those individuals who drink beverages with a low alcohol con- tent, such as beer and wine. 7. A poster from scientists at the American Health Foundation in Valhalla, NY, reported studies in which cancers were induced in rats by the use of smokeless tobacco. The authors were A. RIVENSON, DIETRICH HOFFMANN and STEPHEN HECHT. Ninety-one rats were treated surgically to create a canal in the lower lip. The canal was filled 5 times a week for 28 months with either snuff powder (30 rats), snuff enriched with its own water extract (30 rats) or the extracted residue of snuff (21). The remaining 10 animals served as a control group for monitoring the effects of surgery only. The results: Rats treated with-snuff had 1 squamous cell can- cer:-. of the oral cavity,,, 1 squamous cell papilloma of the hard palate and 1 meningioma. Treatment with enriched snuff caused 1 squamous cell papilloma of the floor of the mouth and 1 nasal olfactory tumor. Treatment with extracted snuff induced 1 squa- mous cell papilloma of the hard palate. The controls had no tu- mors. In a parallel study, rats were treated daily for 30 months by swabbing the oral cavity with either a water extract of snuff (30 rats), snuff enroched with two tobacco-deried nitrosamines (30), water containing the two nitrosamines (30), or water (21). In the group treated with the nitrosamines, 8/30 rats had oral tumors and C/30 had lung cancers. The incidence of tumors in the other groups was not significant compared to controls. A!- ., 8. "Effects tract tumors, of cigarette smoke and vitamin C on respiratory oral leukoplakia and costochondral hyperplasia N N ~ 00
Page 9: yto15d00 Log in for more options!
induced by diethylnitrosamine (DEN) in hamsters" -- TAKANORI HARADA, Mitsukaido Laboratories, Tokyo. This poster described an experiment in which male Syrian golden-hamsters receiving 12 weekly subcutaneous injections of DEN-were subjected to cigarette smoke inhalation and maintained on a diet with or without 1% vitamin C_ supplement for 58 weeks. Various types of respiratory tract- tumors, oral leukoplakic lesions and costochondral (relating to -rib- cartilage) hype.rplasia were found in the DEN-treated animals.=The incidence of tumors in the nasal cavity, larynx and trachea= and of oral leukoplakic lesions was significantly higher in the smoke-exposed hamsters than in the control animals. Hamsters that got the vitamin C supplement had significantly lower incidences of nasal cavity tumors and oral leukoplakic lesions and showed much earlier appearance of the tracheal tumors than did the smoke-exposed animals without the vitamin supple- ment. Also, appiearance of the costochondral hyperplasia 'was significantly earlier and the incidence was higher in the vitamin C-supplemented hamsters. The findings indicate that the induction of upper respiratory tract tumors and oral leukoplakic tumors by DEN could be provoked by cigarette smoke and that the provoking effect on the develop-. ment of nasal cavity tumors and oral leukoplakic lesions might be inhibited by vitamin C. However, the occurrence of tracheal tu- mors and costochondral hyperplasia seemed to be accelerated by vitamin C supplement. 9. OSCAR AUERBACH, Veterans Administration Medical Center, East Orange, NJ, was lead author of a poster on histologic type of lung cancer and asbestos exposure. One of the coauthors was LAWRENCE GARFINKEL, chief statistician of the American Cancer Society. Neither man was at the meeting._ The histologic types of lung cancer in 747 men and 107 women from three hospitals and one international study of insulation workers were evaluated. About half the cases were diagnosed from surgical slides and the other half from autopsy slides. Of these, 196 had asbestos exposure. Squamous cell cancer constituted the largest percentage of tumor types and was found with the same frequency in exposed *and nonexposed groups. Small cell carcinoma was found in 25% of as- bestos-exposed patients and in 15% of the nonexposed patients. Upper lobes of the lungs were involved in about two-thirds of the c-ases with asbestos exposure and lower lobes in the other third. Little difference was found in histologic type in cases regardless of whether upper or lower loves were involved. Cigarette smokers who smoked until their cancers were diag- nosed showed no difference in histologic type by amount smoked .1 h ~ 0 Ln ~ 0 N N ~ 1o
Page 10: yto15d00 Log in for more options!
10. , and slight but not statistically significant former smokers. differences from 10. Nigel Gray of Australia and MICHAEL KUNZE, professor of community and social medicine at the University of Vienna, co- chaired the session at which Doll spoke about passive smoking. There-were other speakers at the session,.which was on "Smoking or Health: the-Role of Cancer Societies." A. CALUM MUIR, 'of the International Agency for Research on Cancer, Lyon,--France, spoke on cancers other than of the lung that have been associated with tobacco. He discussed smokeless tobacco and the various forms in which it is used around the world. Smokeless tobacco, whether prepared commercially or by "artisans," increases the risk of oral cancer. As many as 400- million persons use smokeless tobacco (mostly in third world nations) and the result is an estimated 100,000 cancers in males and 50,000 in females annually; most of these cancers are in the oral cavity. + The tobacco companies, he said, f aced with lower cigarette sales in developed countries, are now promoting the use of "chew- ing snuff" in the form of "sachets" for oral use. "If the sale of these products, which do not carry any health warning, is allowed to continue, the toll of periodontal disease and oral cancer will be high." B. DON ELLIOT HEALD of Atlanta, chairman of the American Can- cer Society (ACS), said a major U.S. publisher will soon be issu- ing a stop-smoking program that includes a book and both audio and video cassettes. C. The ACS's new executive vice president, G. ROBERT GADBERRY (he recently succeeded Lane Adams), said the U.S. tobacco indus- try was spending $2-billion annually in advertising-promotion. At one point, he said there "may be asmany as 500,000 tobacco deaths each year (in the U.S.)." D. Kunze, who has long been involved in the UICC's smoking control program (headed by Gray), said such programs cannot succeed without the direct involvement of political activists. D. DAVID SIMPSON, head of Britain's Action on Smoking and Health, gave a brief "how-to-do-it" talk about getting and main- taining governmental support at every level in order to combat the "pervasive influence" of the tobacco industry, which is al- ways inviting politicians to sports and cultural events. E. KJELL BJARTVEIT of Oslo, architect of Norway's antismoking program, said smoking was decreasing so strongly in Norwegian youths`aged 16-20 years, he expected this group will be smoke- f ree by the year 2000 or soon thereafter. F. Gray said global antismoking efforts generally are succeed- ing. Smoking is falling at the rate of about 1% yearly in many r•

Text Control

Highlight Text:

OCR Text Alignment:

Image Control

Image Rotation:

Image Size: