Human papilloma virus and Human papilloma virus vaccines Текст научной статьи по специальности «Фундаментальная медицина»

IBRAHIM A. ABDELAZIM1, MOHANNAD ABU-FAZA2, M. HUSSAIN1, G.A. ZHURABEKOVA3, A.D. BALMAGAMBETOVA3,

S.S. ZHUMAGULOVA4, A.N. KALKENOVA5

HUMAN PAPILLOMA VIRUS AND HUMAN PAPILLOMA VIRUS VACCINES

Ain Shams University1,1, Cairo, Egypt, Ahmadi Kuwait Oil Company (KOC) Hospital2, Kuwait West Kazakhstan Marat Ospanov State Medical University3, Aktobe, Kazakhstan Regional perinatal center of Aktobe city4, Aktobe, Kazakhstan Shalkar District Hospital5, Aktobe, Kazakhstan

К.м.н., доцент

Кафедра внутренней медицины факультета последипломного образования Моб. тел.: +3 805 09723993

3.

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Background. The main purpose behind the development of HPV vaccines was to prevent cervical cancers. Gardasil vaccine, manufactured by Merck Company, called a quadrivalent vaccine because it protects against four HPV types; 6, 11, 16 and 18. FDA has approved Gardasil for use in females for the prevention of cervical cancer and some vulvar and vaginal cancers caused by HPV types 16 and 18 and for use in males and females for prevention of genital warts caused by HPV types 6 and 11.

Cervarix manufactured by GalaxoSmithkline (GSK) Company, called a bivalent vaccine because it targets two HPV types: 16 and 18. FDA approved Cervarix for use in females for prevention of cervical cancer caused by HPV types 16 and 18.

Neither of both vaccines has been proven to provide complete protection against other HPV types and about 30 percent of cervical cancers will not be prevented by these vaccines. Because both vaccines don't protect against all HPV infections that cause cervical cancer, it is important for vaccinated women to continue the cervical cancer screening program as for women who have not been vaccinated.

Key words: Human Papilloma Virus, Human Papilloma Virus Vaccines, cervical and vaginal cancer.

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Human Papilloma Virus (HPV) and its B. types. HPVs group contains more than 100 related viruses. Each virus in this group given a specific number. HPVs are called papilloma viruses because some types of HPV Virus cause warts or papillomas. HPVs are attracted to the squamous epithelial

High-risk HPV types

Low grade changes, high grade and .. .

b b , b b How common is HPV?

pre-cancers changes in the cervix. Genital or anal cancers[2]. High-risk HPV types include.

(transmission by genital contact without sexual intercourse is not common, but possible). Infection has been reported in women without any sexual intercourse.

It is not spread through blood or body fluids (this why transmission from mother to newborn during delivery is rare and it cause warts in the infant's throat called JRP. Because this method of transmission is rare and the cesarean section is not sure to prevent the transmission of the HPV, so cesarean section is not recommended for delivery of the mothers with genital HPV unless the warts caused by HPV block the birth canal[3].

Risk factors for genital HPV infection. Starting sexual activity at age < 16 years (increase duration of exposure).

Sexual relations with many partners. Practicing sex with one who had multiple sexual relations.

HPV16, HPV18, HPV31, HPV35, | #

cells in the body (skin, anus, vulva, vagina, cervix, head of the penis and throat) [1].

HPV39, HPV45, HPV51, HPV52, HPV

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Genital HPV is a very common virus. In the United States, over 6 million people get HPV infection every year. Half of the infections occur at age between 15 - 25 years[4].

I. About 60 HPV types cause non

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genital warts (hands & feet).

mucus membrane in vagina & anus). A.

II. About 40 HPV types cause ano-genital lesions (Mucosal types = attack the

Low-risk HPV types (HPV type 6 & 11) Ano-genital warts = Condyloma acuminatum

Low grade changes in the cervix JRP = Juvenile

Low Risk and High Risk HPVs. Low risk HPV types can cause genital warts, low grade changes in the cervix, JRP.

High risk HPV types can cause low & high grade & pre-cancer changes, in the cervix.

How HPV Works?

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1.

Mode of transmission of HPV

infection

respiratory papillomatosis (warts of the throat). 2.

Direct sexual contact during vaginal, ^ # oral or anal sex.

Direct skin to skin contact

The HPV virus infects epithelial tissues through micro-abrasions, leading to entry of the virus into basal epithelial cells. At this point, the viral genome is transported to the nucleus and the virus using the DNA of the cells to form DNA of the virus (infected cells become the machine working for viral replication). Each infected cell forming a copy number between 10-200 viral genomes.

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• The viral E6/E7 proteins inactivate two tumor suppressor protein, p53 (E6) and (retinoblastoma protein) pRb (E7), thus pushing the cell cycle forwards, with inhibition of the natural tumor suppressor factors.

• Once HPV invades a cell, the cell considered infected, and the virus can be transmitted. Several months or years may pass before any lesions can be clinically detected. The interval from infection to clinically detectable disease (latent period) [5,6].

Symptoms of HPV infection

□ No symptoms at all

□ Genital warts

Prognosis of HPV infection

□ 90% of cases, the body's immune system clear the HPV infection within 2 years (high and low risk viruses).

□ 10% of cases the immune system cannot clear the HPV from the cells and the immune system suppressed the infection (not destroyed completely) to an extremely low level (not detected by lab tests). In this situation, few cells of the cervix still contain HPV virus, and the virus will be activated if the immunity suppressed. This explains that the changes in the cervix may suddenly appear many years after normal Pap smear without any new sexual contact. The infected cells with HPV will change to high-grade SIL (HSIL=CIN 2 & 3)[7].

Relation between HPV and cancer cervix> 99% of cancer cervix are HPV related and >70% are related to HPV 16 & 18.

• About 500,000 pre-cancerous cell changes of the cervix, vagina and vulva are diagnosed each year in the United States and more than 50% of these changes are related to HPV 16 &18.

HPV 16 & 18 (high risk group) which causing the high grade changes in the cervix, are responsible also, for low grade changes in the cervix [8,9]. HPV Related Cancers

• Vulva, vagina and cervix

• Anus

• Penis and urethra

• Tongue and tonsils

HPV related cancers in men HPV have been linked to cancer of the penis (rare) and anus (not rare). Carcinoma of the anus is common in men and women who practice anal sex (anal sex increases the risk of exposure to HPV infection).

There are no tests approved to detect HPV infection in men.

In gay, and bisexual some authors use anal Pap smear to diagnose pre-cancerous changes of the anus [10]. HPV can be treated? Although, HPV itself cannot be treated

90% of genital HPV infection destroyed by the body's immune system within 2 years (both high risk and low risk HPV types).

Most of the cell changes that come from HPV infection (warts, pre-cancers or early cancers lesions) can be diagnosed and treated.

HPV can be prevented?

• The only sure way to prevent HPV is to stop completely all sexual activity.

• Being faithful (means you and your partner practicing sex with each other and no one else).

• Using a condom EVERY time when you have sex (condoms not always protect from HPV, but they may reduce the risk of HPV infection)

• Getting one of the HPV vaccines BEFORE being exposed to HPV. Vaccines to prevent HPV

Two vaccines are available to prevent specific types of HPV and to prevent the cancers linked to those types of HPV: Gardasil® and Cervarix®.

Both vaccines prevent the 2 types of HPV (16 & 18) that responsible for 70% of cancer cervix.

Gardasil also protects against the 2 types of HPV (6 & 11) that responsible for 90% of genital warts.

The vaccine does not protect against all of the HPV types that can cause cervical cancer.

The vaccines should not be

considered a substitute for routine Pap smear [10].

How do HPV vaccines work?

The vaccine is formed of the unique surface components of HPV which is L1 protein

in formcalled virus like particles (VLP), VPL are lacking the viral DNA (non infectious), so they stimulate the immune system to produce an antibodies response to protect the cells against new HPV infection. Although these vaccines can prevent HPV infection, they do not eliminate the existing HPV infections from infected cells.

Gardasil

VLPS are assembled from L1 protein of HPVS types 6, 11, 16 and 18 (Qurivalent of Merck) by yeast by cell disruption then purified by multiple chemical tests and absorbed on Aluminum Adjuvant (Amorphous Aluminmum Hydroxy phosphate) AAH-Gardaisl.

Content of Gardasil

• 20 mcg of HPV 6 L1 protein

• 40 mcg of HPV 11 L1 protein

• 40 mcg of HPV 16 L1 protein

• 20 mcg of HPV 18 L1 protein

Before Approval of Gardasil

1991, VLPs produces by Australian investigators, can activate the immune system, but were not similar in their structure as infectious VLPs.

1993, the national Cancer Institute (NCI) was able to generate VLPs that were morphologically correct and similar to infectious HPV.

Gardasil was tested in more than 21,000 girls and women in many countries around the world with no deaths or serious side effects reported during those trials.

Gardasil Approval

FDA approved Gardasil for use

In females aged 9-26 years for prevention of HPV types 16 and 18 and cancers related to those types of HPVs.

In males and females for prevention of HPV types 6 and 11 and genital warts caused by those types of HPVs.

More than 24 million doses of the vaccine had been distributed in USA and more than 40 million doses have been distributed worldwide.

Gardasil Safety

December, 2008, the Vaccine Adverse Event Reporting System (VAERS) had received a total of 12,424 reports of potential side effects following Gardasil vaccination (6% of those reports were serious side effects):

32 cases of death, each death has been reviewed by FDA and CDC and they explained that the deaths were occurred due to other causes as drug abuse, diabetes, DVT and heart failure.

Guillain-Barre Syndrome (GBS), the CDC and FDA concluded that the number of GBS cases reported was within the range and not related to the vaccine.

DVT & Pulmonary embolism, occurred more than expected with Gardasil, and because the DVT not common in young women receiving the vaccine. This report is under study by CDC and FDA.

Allergic reactions & fainting attacks are not higher after Gardasil vaccination compared to other vaccines (A 15 minute waiting interval is recommended).

The Gardasil should be used primarily in women at high risk for cervical cancer, because the death rate for cervical cancer is low (3/100,000 women) which is similar to the rate of serious side effects reported after Gardasil (3.4/100,000 doses distributed). Cervarix

VLPs assembled from the L1 proteins of HPV types 16 & 18 (Bivalent, GSK).

Cervarix is designed originally by GSK to protect against HPV types 16 & 18, additionally, some cross protection against HPV types 31 & 45 were proved in clinical trials [10].

Content of Cervarix The L1 protein of the HPV is created by recombinant activity in the baculovirus.

• 20 mcg of HPV 16 L1 protein

• 20 mcg of HPV 18 L1 protein

• + the unique adjuvant AS04 (Aluminum salts + Monophosphoryl lipid) (AS04-Cervarix)

Before approval of cervarix The safety of Cervarix was tested in almost 24,000 girls and women in many countries around the world. There were

no deaths linked to the vaccine. The most common side effects were redness or swelling at the injection site or headaches, stomach upset and muscle aches after the

vaccine.

Approval of cervarix Australia Approval (May 2007)

fl irnnûor I I l*\ I r\ A rvr\r/M/ol ^

European

(September 2007)

Union

Approval

FDA Approval (October 2009)

FDA Approved Cervarix for use in females for prevention of HPV types 16 and 18 and cancer related to those types

of HPVs.

Safety of Cervarix

• • Like Gardasil, fainting is a risk after getting Cervarix and a 15 minute

waiting period is recommended after

vaccination.

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• • Unrelated Deaths, 2009, 1 14 years old schoolgirl died hours after receiving Cervarix vaccination in England. A full post-mortem identified the cause of death to be from malignant tumor of chest. Gardasil or Cervarix

• 1. Diane Harper (involved in clinical trials of both vaccines), said that the main purpose behind the development of these HPV vaccines was to prevent cervical cancer and for this indication, Cervarix is the better of the 2 vaccines due to ;

• Cervarix protect for longer duration than Gardasil (6.4 versus 5 years)[1].

• Cervarix gives cross protection for another two types of high risk HPV (31 & 45), in addition to HPV 16 & 18.

• The antibody titers induced by

Cervarix are superior to those

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induced by Gardasil (2.3-4.8 fold higher one month after the 3 doses

of the vaccines)[1]. • Antigen specific memory B-cells response 2.7 fold higher with Cervarix than Gardasil one month

after 3 doses of vaccination, this is due to the unique adjuvant system

in Cervarix.

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• 2. Vicky Debold, director of patient safety at the National Vaccine Information Center (NVIC), said that; her view was colored after listening

to reports of adverse events from parents whose daughters suffered after vaccination with Gardasil. She said also, I'm not sure what is going on, but there are many patients with problems such as demyelinating conditions or even deaths and

I wonder if there is a tendency toward a hyper-stimulating of the immune system that results in such catastrophic outcomes. She suspects that there are individuals who might be susceptible to adverse effects, because of pre-existing conditions or genetic vulnerability.

3. The only advantage of Gardasil over Cervarix is protection against HPV 6 & 11, causing male genital warts by using Gardasil for boys 9 to

II years old.

The trials showed that the antibodies titer after Gardasil dropped off within 2 years, which raises the concern that any protection offered by Gardasil decreased by the time, when these boys become sexually active.

The genital warts are not life-threatening and the male genital cancers that the vaccine offers protection against them (penile and anal cancer) are not common. FDA recommendations for the HPV vaccines:

for females before any type of sexual contact in a series of 3 doses within 6 months (at 0, 2 & 6 months for Gardasil and 0, 1 & 6 months for Cervarix).

FDA recommended the HPV vaccines for females between 9-26 years for prevention of HPV 16 & 18. Gardasil for males between 9-11 for prevention of HPV 6 & 11. Benefits of HPV Vaccines: Both vaccines prevent the 2 types of HPV (16 & 18) that cause 70% of cervical cancers.

Gardasil also protect against the 2 types of HPV (6 & 11) that cause 90% of genital warts.

Cervarix gives cross protection against HPV types 31 & 45.

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The FDA & CDC staid that; the vaccine only prevents infection but cannot prevent the progression of the disease once a person is already infected.

Contraindications of HPV vaccines: Woman, who developed a life threatening allergic reaction to an earlier dose of HPV vaccines, should not continue the series of vaccination.

HPV vaccines in pregnant and lactating women

Woman, who finds out that she was pregnant when she got the vaccine, is encouraged to continue pregnancy and she will restart the vaccine series after delivery.

Gardasil is given lactating women (approved), but the Cervarix is not approved.

Duration of vaccination and booster doses:

FDA & CDC said that the vaccine will protect for just 4 years, and booster doses will be needed regularly every 4 years.

Screening for HPV before the vaccine: Screening for HPV is not recommended before vaccination Because a positive HPV test result will not tell us which types of HPV are present

Even after infection with one type of HPV, the vaccine could protect against other types of HPV. The need Pap smear after vaccination:

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■ The vaccine will not protect against all types of HPV (protect against 16 & 18 causing 70% of cervical cancer).

■ FDA & CDC said that; the vaccine should not replace a yearly exam and Pap smear.

Get Healthy Cervix

1. Get a Pap smear (the Pap smear can diagnose cervical changes and when treated properly the progress to cervical cancer is prevented).

2. Follow the Doctor's Recommendations; if he recommends colposcopic examination after abnormal Pap smear.

3. Get Vaccinated with the HPV Vaccines

4. Practice Safe Sex

5. Report Symptoms to Your Doctor (Which may indicate cervical problem)

• Pain related to sexual intercourse

• Post-coital bleeding or abnormal bleeding(menorrhagia, metrorrhagia)

• Offensive vaginal discharge REFERENCES

1. De Vuyst, H.; Clifford, G. M.; Nascimento, M. C.; Madeleine, M. M.; Franceschi, S. (2009). «Prevalence and type distribution of human papillomavirus in carcinoma and intraepithelial neoplasia of the vulva, vagina and anus: A meta-analysis». International Journal of Cancer 124 (7): 1626-1636.

2. «FDA approves Gardasil 9 for prevention of certain cancers caused by five additional types of HPV» (press release). 10 December 2014. Retrieved 9

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January 2015.

3. Dunne, EF; Unger, ER; Sternberg, M (February 2007). «Prevalence of HPV infection among females in the United States». JAMA: the journal of the American Medical Association 297 (8): 813-19.

4. Cottler L, Garvin EC, Callahan C (September 2006). «Condom use and the risk of HPV infection». The New England Journal of Medicine 355 (13): 1388-9.

5. Arteaga, Arkaitz. «The Shape and Structure of hpv». Retrieved January 15, 2015.

6. «FDA Licenses New Vaccine for Prevention of Cervical Cancer and Other Diseases in Females Caused by Human Papillomavirus». U.S. Food and Drug Administration. 2006-06-08. Retrieved

2009-11-13.

7. Parkin, D. M.; Bray, F.; Ferlay, J.; Pisani, P. (2005). «Global Cancer Statistics, 2002». CA: A Cancer Journal for Clinicians 55 (2): 74-108.

8. Parkin, D. M.; Bray, F.; Ferlay, J.; Pisani, P. (2005). «Global Cancer Statistics, 2002». CA: A Cancer Journal for Clinicians 55 (2): 74-108.

9. «The Genital HPV Infection Fact Sheet». Centers for Disease Control and Prevention (CDC). 2009-11-24. Retrieved

2010-02-13.

10. Kohout, T; Stewart, A. «New Report Examines Laws that Would Mandate HPV Vaccine for Young Women». Jacobs Institute for Women's Health, George Washington University. Retrieved 2010-02-13.

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TYMIH

IBRAHIM A. ABDELAZIM1, MOHANNAD ABU-FAZA2, M. HUSSAIN1, r.A. ЖУРАБЕКОВА3, A.Д. БАЛМАГАМБЕТОВА3, С.С. ЖУМАГУЛОВА4, A.H. КАЛКЕНОВА5

АДАМ ПАПИЛЛОМАСЫ ВИРУСЫ ЖЭНЕ АДАМ

ПАПИЛЛОМАСЫ ВИРУСЫНА КАРСЫ ЕКПЕЛЕР

Айн Шаймс университетi, Каир, Египет1, Кувейт Ойл Компани «КОК» ауруханасы2, Ахмади, Кувейт Марат Оспанов атында^ Батыс Казакстан мемлекетпк

медицина университетi3, Актебе, Казахстан Облыстык перинаталдык орталыfы4, Актебе, Казахстан

Шалкар аудандык ауруханасы5, Актебе, Казакстан

АПВ карсы екпе жасаудын непзп максаты жатыр мойны Kатерлi ¡апнщ алдын алу болатын. Мерк Компани компаниясы жасаfан Гардасил екпесi АПВ 6, 11, 16 жэне 18 - терт титнен Kорfайтындыктан квадривалентт екпе деп аталады. Азык-тулт пен дэрндэрмек саласын бакылау баскармасы эйелдерде АПВ 16 жэне 18 титнен болатын жатыр мойны Kатерлi idri мен кейбiр турпайы жэне вагиналды катерл1 iсiктердiн алдын алу ушш Гардасилдi колдануды макулдады жэне АПВ 6 жэне 11 титнен болатын ерлер мен эйелдердщ су^р ушт кондиломынын алдын алу Yшiн екпен колдануды макулдады.

Глаксосмиткляйн (ГСК) компаниясында ендiрiлетiн Церварикс АПВ-нын екi тит: 16 жэне 18 типiне арналfандыктан, екiваленттi екпе деп аталады. Церварикс эйелдерде АПВ 16 жэне 18 титмен болатын жатыр мойны катерлi ¡стнщ алдын алу Yшiн колдануfа Азык-тYлiк пен дэрi-дэрмек саласын бакылау баскармасымен макулданды.

Екi екпенщ де жатыр мойны катерлi iсiгiне экелт соfатын барлык инфекциялар мен АПВ-нын баска да типтерiнен толык Kорfанысты камтамасыз ете алатындыfына накты дэлел жок болfандыктан, осы екпелердiн кемеп жатыр мойны катерл1 iсiктерiнiн 30 пайызы жаfдайында колданылмайды. Екпе жасалмаfан эйелдер сиякты, екпе жасалfан эйелдер де жатыр мойны катерлi idri скринингшщ баfдарламасын жалfастыруы кажет.

Нег'1зг'1 свздер: адам папилломасы вирусы, адам папилломасы вирусына к,арсы екпелер, жатыр мойны к,атерлi iсiгi жэне к,ынаптын к,атерлi iсiгi.

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РЕЗЮМЕ

Ibrahim A. Abdelazim1, Mohannad Abu-Faza2, M. Hussain1 , r.A. Журабекова3, A.Д. Балмагамбетова3, С.С. Жумагулова4, A.H. Калкенова5

ВИРУС ПАПИЛЛОМЫ ЧЕЛОВЕКА И ВАКЦИНЫ ПРОТИВ ВИРУСА ПАПИЛЛОМЫ ЧЕЛОВЕКА

Университет Айн Шамс, Каир, Египет1, Больница Кувейт Ойл Компани «КОК»2, г. Ахмади, Кувейт Западно-Казахстанский Государственный Медицинский Университет имени Марата Оспанова3, Актобе, Казахстан Областной перинатальный центр4, Актобе, Казахстан Шалкарская районная больница5, Актобе, Казахстан

Основной целью разработки вакцин против ВПЧ было предотвращение рака шейки матки. Вакцина Гардасил, произведенная компанией Мерк Компани, называется квадривалентной вакциной, так как она защищает от четырех типов ВПЧ: 6, 11, 16 и 18. Управление по контролю за продуктами и лекарствами одобрило применение Гардасил для профилактики рака шейки матки и некоторых вульварных и вагильнальных раков у женщин, вызванных 16 и 18 типами ВПЧ и одобрило применение вакцины для профилактики остроконечных кондилом у мужчин и женщин, вызванных 6 и 11 типами ВПЧ.

Церварикс производства Глаксосмиткляйн (ГСК) компании, называется двухвалентной вакциной, так как он предназначен для двух типов ВПЧ: 16 и 18. Церварикс одобрен Управлением по контролю за продуктами и лекарствами к применению для профилактики рака шейки матки у женщин, вызванного типами 16 и 18 ВПЧ.

Около 30 процентов случаев рака шейки матки не будет предотвращено с помощью этих вакцин, так как нет доказательства, что обе вакцины могут обеспечить полную защиту от всех инфекций и других типов ВПЧ, которые вызывают рак шейки матки. Для вакцинированных женщин важно продолжить программу скрининга рака шейки матки, как и для женщин, которые не были вакцинированы.

Ключевые слова: вирус папилломы человека, вакцины против вируса папилломы человека, рак шейки матки и рак влагалища.