World Journal of AIDS, 2011, 1, 131-135
doi:10.4236/wja.2011.14018 Published Online December 2011 (http://www.SciRP.org/journal/wja)
Copyright © 2011 SciRes. WJA
HIV/STIs and Pregnancy Prevention, Using a
Cervical Barrier and Microbicide
Alfred A. Shihata1, Steven A. Brody2
1Scripps Institution of Medicine and Science, San Diego, USA; 2Department Endocrinology & Metabolism, School of Medicine,
University of California, La Jolla, USA.
E-mail: firstname.lastname@example.org, email@example.com
Received August 5th, 2011; revised September 27th, 2011; accepted October 13th, 2011.
Objectives: 1) HIV prevention, using a mechanical cervical barrier in combination with microbicide. 2) Prevention of
pregnancy. 3) Shield the cervix to prevent sperm penetration and Gonorrhea, Chlamydia and HIV virus invasion. Me-
thods: We investigated a new FDA approved cervical barrier FemCap (Figure 1). The FemCap is a contraceptive de-
vice that is designed with a unique delivery system for microbicides on its cervical and vaginal sides (Figure 2) to en-
sure better coverage, and retention of gel on the cervix and va gina. We also compared the acceptability and adh erence
with the FemCap, and retention of a stained vaginal lubricant when delivered with the FemCap versus the vaginal lu-
bricant when delivered using a traditional vag inal applicator (Figure 3). We used th e same vaginal applicator utilized
in the CAPRISA 004  study, to deliver Tenofovir microbicide. Thirty women compared the use of a vaginal applica-
tor to deliver a high viscosity stained vaginal lubricant before and after intercourse, versus the FemCap to deliver the
same lubricant once before intercourse. The acceptability and efficacy of this delivery system was evaluated. Results:
Forty percent (12) women missed the application of the lubricant with the vaginal applicator before intercourse and
10% missed it after intercourse. Amongst FemCap users (3) wom en (10%) missed application of the vaginal lubricant
before intercourse and all of them inserted it after intercourse. The stained gel was better retained over the cervix
(Figure 4) by single application with the FemCap versus two applications with the traditional applicator (Figure 3).
Conclusions: Women in this study preferred the FemCap due to elimination of leakage and the single application, me-
thod versus two applications with the traditional vaginal applicator. The use of the FemCap, can prevent pregnancy,
HIV mother-to-child tran smission, enhance compliance and retention of gel over the cervix and vagina that may poten-
tially prevent STIs and increase the efficacy of Tenofovir.
Keywords: HIV Prevention, Mi crobi ci de Tenofovir, FemCap Delivery System
Despite numerous effective evidence-based preventive
interventions, such as the condom [2,3], circumcision,
Tenfovir gel , the HIV pandemic is still outpacing all
the above methods. Therefore the importance of innova-
tive practices employing the a bo ve mentioned methods as
well as novel interventions are need ed.
Women are the fastest growing population affected by
sexually transmitted infections and Acquired Immune
Deficiency Syndrome (STIs/AIDS) worldwide . Women
are biologically vulnerable, and suffer disproportionately
more from the consequences of unplanned pregnancy and
The cervix is the main portal of entry for the HIV virus.
This is due to the presence of high concentration of the
Chemokine receptors CCR5 and CRX4 on the cervix .
Gonorrhea and Chlamydia are intracellular organisms and
they invade and colonize the endocervical canal. These
non-ulcerative STIs, when present, enhance the invasion
of HIV . Covering the cervix by a cervical barrier in
combination of spermicide/microbicide can 1) prevent
sperm penetration 2) potentially prevent Gonorrhea Ch-
lamydia, and 3) potentially prevent HIV virus invasion of
With no cure or vaccine anticipated in the near future,
HIV continues to spread despite the availability of the
condom and other preventive measures. Vaginal micro-
bicides are a female-initiated new class of drugs that are
intended to prevent the transmission of STIs/HIV fr om the
male to the female and from the female to the male. They
come in gels, creams, suppositories, films, and tablets.
HIV/STIs and Pregnancy Prevention, Using a Cervical Barrier and Microbicide
Almost all microbicides, even lemon juice and soap and
water, can kill the fragile HIV virus in-vitro. Some mi-
crobicides when inserted into the vagina, including,
Nonoxynol-9 , Cellulose Sulfate , Pro 2000  and
Carragaurd  failed to prevent HIV/AIDS infections in
Tenofovir gel, a nucleotide reverse transcriptase in-
hibitor, was shown to significantly reduce the risk for HIV
transmission in CAPRISA 004 . Tenofovir vaginal gel
reduced the likelihood of HIV acquisition by an estimated
39% overall. Among women with good (>80%) (self-
reported), compliance, HIV seroconversion was 54%
lower in the Tenofovir arm compared with the placebo
arm (P = 0.025). Among those who had poor adherence
(self-reported) with Tenofovir application (<50%), the
reduction in HIV seroconversion in the Tenofovir arm
was only 28%. Tenofovir 1% gel would have far less
systemic absorption, side effects or developing resistance
and would have much higher concentration in the vagina
if compared with oral antiretroviral pre-exposure pro-
phylaxis. To improve on our previous study  and to
enhance detection of the vaginal lubricant we, mixed two
drops of Gentian Violet dye with every 10 ml of the lu-
bricant, and also increased the number of the participants.
This research in progress to validate and verify the re-
sult of our previous published article  .It should be
noted that the addition of the Gentian violet dye was a
major improvement over our previous research. The ad-
dition of the dye greatly enhanced the detection of re-
tained gel over the cervix and vagina (Figure 4). This
clearly distinguished the abse nce of the gel when applied
with the traditional vaginal applicator (Figure 5). We
considered the increase of participants from 20 to 30 is
also a major improvement, which markedly in creased the
power of the study. This is despite the difficulty of re-
cruitment of women to use a stained gel.
This is work in progress to validate our previous pilot
study  to compare the adherence, retention and effi-
cacy of two microbicide delivery systems. The FemCap
and the conventional vaginal applicator used in the CA-
PRISA 004 study to deliver the tenofovir gel.
The FemCap is a new contraceptive device, (Figure 1)
[12-19] that i s desi g ned with a unique del i ve ry sy st em for
the microbicide on its cervical and vaginal sides (Figure
2). The aim of this design is to allow for better adherence,
coverag e, dist r ibut i on a nd r et ent io n o f t he g el for u p to 24
We intended to build upon the partial success of the
Tenofovir gel 1% in prevention of HIV acquisition. We
investigated the feasibility and acceptability of the Fem-
Cap microbicide delivery system as an alternative to the
traditional vaginal applicator that was used in CAPRISA
004  ((Figure 3). Participants selected for this study
were ages 18 to 40 years, were not pregnant, and did not
desire to be pregnant during the 4 week study duration.
All subjects were free from sexually transmitted diseases
and reported being sexually active. Thirty participants
(40% of wh om were sterilized an d 6 0% of whom were on
hormonal contraception), signed an informed consent and
underwent a complete physical and pelvic exam as well as
cervical colposcopic evaluation.
Fifteen women (Group A) were randomly assigned to
use the vaginal applicator, (Figure 3) and the other 15
women (Group B) were assigned to use the FemCap
(Figure 2) to deliver a high viscosity vaginal lubricant
stained with Gentian violet dye, as a substitute fo r Teno-
fovir gel for two weeks.
After one week of wash over group (A) then crossed
over an d us ed the Fem Cap an d gr oup (B) us ed t he va gina l
applicator for two additional weeks. Participants were
instructed to record and report the use of the vaginal ap-
plicator and the FemCap and any side effects on a calen-
Figure 1. New FDA approved cervical barrier FemCap.
Figure 2. FemCap cervical and vaginal sides.
Copyright © 2011 SciRes. WJA
HIV/STIs and Pregnancy Prevention, Using a Cervical Barrier and Microbicide133
dar. This facilitated a comparison between compliance
with the vaginal applicator to deliver a vaginal lubricant
before and after intercourse and with the FemCap to de-
liver the same lubricant only once before intercourse for
four weeks. Women in both groups had an average three
acts of intercourse per week.
We provided participants with hygienic pads to monitor
the expulsion of the stained gel.
We swabbed each participant’s vagina and introitus for
the presence or absence of the stained lubricant at 6, and
12, hours after insertion of the lubricant using both de-
vices. In addition cervical colposcopic exam was per-
formed and the cervix was swabb ed 24 hours after in ser-
tion of the lubricant using the applicator and the FemCap.
Finally the investigators conducted in-depth interviews
with each of these 30 women as to what they thought the
reasons might be why they inserted or failed to insert gel.
None of the participants reported any significant side
effects using either device. Naked eye examination and
colposcopy did not show any significant lesions over the
cervix or the vagina. Women reported increased leakage
of the stained lubricant from the vagina following the use
of the vaginal applicator. This was verified by the pres-
ence of the stained gel on the hygienic pads.
Participants preferred the use of the FemCap, due to
elimination of leakage and the single a pplicati on protoc ol,
versus two applications with the vaginal applicator.
Women also stated that it was much easier to remember
one application with the FemCap for a span of 24 hours,
versus two applications, one before intercourse, (which
was unpredictable) and a second application after inter-
Twelve women (40%) reported that they missed the
application of the stained lubrican t more than once before
intercourse by using the vaginal applicator and three dif-
ferent women (10%) missed it after intercourse. Nine
women 30% failed to apply the lubrican t with the vaginal
applicator after the cross over. With the FemCap, only
three women (10%) missed application of the stained
vaginal lubricant before intercourse and two different
women missed it after the cross-over Swabbing and col-
poscopy of the cervix and vagina after 6,12 and 24 hours,
in women who used the FemCap and the vaginal appli-
cator showed the following: The stained vaginal lubricant
was present over the cervix (Figure 4), and to a lesser
degree on t he upper vagina with m any bare a reas, and was
absent over the lower vagina and introitus 24 hours after
application with the FemCap. We failed however to detect
the presence of the st ained vaginal lu bricant after 12 hours
on the cervi x or the vagina (Figure 5) in wo men who use d
the vaginal applicator Table 1.
Therefore according to this study, a single application
of the stained vaginal lubricant using the FemCap deliv-
ery system has proven to have better acceptability, com-
pliance, gel distribution, and retention than two applica-
tions by the vaginal applicator.
Figure 3. Traditional vaginal applicator.
Figure 4. Retained gel over the cervix and vagina.
Figure 5. The vagina.
Copyright © 2011 SciRes. WJA
HIV/STIs and Pregnancy Prevention, Using a Cervical Barrier and Microbicide
Copyright © 2011 SciRes. WJA
Table 1. Comparison between distribution and retention of the vaginal lubricant.
after gel application
Stained Vaginal Lubricant applied with t he F emCap once
The Vaginal Applicator
Stained Lubricant applied with the vaginal applicator t wi ce
before and after intercourse
Cervix Stained lubricant present (Figure 4) Absent (Figure 5)
Upper vagina Present with many bare spots (Figure 4) Absent (Figure 5)
Introitus Absent Absent (Figure 5)
According to the CAPRISA 004 study  report, “In-
adequate adherence is the most serious challenge to ob-
taining an accurate estimate of product efficacy. “This
highlights the need to seek higher levels of adherence
and effectiveness with Tenofovir gel and to develop oth-
er effective prevention strategies for use in combination
with Tenofovir gel”.
Based on the CAPRISA 004  result report above,
we investigated the feasibility and acceptability of an
alternative to the vaginal applicator (Figure 3) used in
CAPRISA 004. We agree with the authors of CAPRISA
004 study that poor adheren ce with Tenofovir application
was a major factor in its partial success. Prevention of the
spread of HIV transmission should be the front and cen-
tre of research studies. Adherence with Tenofovir gel
application significantly affected HIV seroconversion in
the CAPRISA 004 study.
This study validate and verify our previous pilot study
 to improve on the adherence and retention and thus
the effectiveness of Tenofovir gel microbicide applica-
tion. We utilized the FemCap delivery system to deliver
a stained vaginal lubricant as a substitute for Tenofovir
gel. We realize that the number of participants is small to
make a judgment about levels of compliance in relation
to type of product, however a larger study is planned that
will provide the tissue concentration level of Tenofovir
and a meaningful statistical analysis.
This methodology allowed us to compare compliance,
as well as the presence or absence of the stained vaginal
lubricant over the cervix and vagina after 24 hours. Fu-
ture studies will be conducted to show the exact inhibi-
tory level of Tenofovir in the epithelial surface of the
cervix and vagina at 6, 12, and 24 hours when applied
with the applicator and FemCap.
Participants were coun seled on the importance of hon-
est and truthful reporting for each and every time they
used the vaginal applicator and the FemCap. The major-
ity of women, 80%, liked the fact that they only needed
to use the FemCap once before intercourse and reapply it
after intercourse only if they neglected to use it before
intercourse. They also liked the lack of leakage of the
stained lubricant from the vagina and the FemCap is
proven to preven t pregnancy an d thus prev ent mother – to
child HIV transmission and could maintain contact be-
tween the microbicide and the cervix and vagina for up
to 24 hours.
Even a modest enhancement of adherence and reten-
tion of the gel, due to the higher acceptability of the
FemCap/ microbicide delivery system, has the potential
to increase Tenofovir effectiveness and save millions of
lives. The FemCap is well accepted among American
women  as well as African women . If this sim-
ple strategy could reduce the risk of STI/HIV transmis-
sion, it would have an enormous impact worldwide. An-
other advantage of using the FemCap is the prevention of
unintended pregnancy and thus prevents the transmission
of the HIV virus from mother-to-child. Future studies are
needed to proof this concept and explore the safety of
Tenofovir gel app li cat i o n usi ng thi s n ovel d e vi ce.
This pilot study illustrated, that, participants had higher
acceptability of the FemCap due to elimination of leak-
age and the single application of the vaginal lubricant,
versus two applications with the vaginal applicator. The
use of the FemCap, can prevent pregnancy, HIV mother-
to-child transmission, and will enhance compliance, dis-
tribution and retention of gel over the cervix that may
potentially prevent STIs and increase the efficacy of Te-
This paper was prepared at the request of Jing Guo the
Editor of World Journal of AIDS (WJA). We are in-
debted to th e women who consented to p articipate in this
research study, and to Dr. Ramez Eskander who edited
this manuscript. No funding was requested or received
from any institution. The authors are responsible for the
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